Commit message: Fix buffer overflow in git diff

If PATH_MAX on your system is smaller than a path stored, it may cause
buffer overflow and stack corruption in diff_addremove() and diff_change()
functions when running git-diff

Signed-off-by: Dmitry Potapov <dpotapov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
CVE: CVE-2008-3546
CWE: CWE-119
Vulnerability description: Stack-based buffer overflow in the (1) diff_addremove and (2) diff_change functions in GIT before 1.5.6.4 might allow local users to execute arbitrary code via a PATH whose length is larger than the system's PATH_MAX when running GIT utilities such as git-diff or git-grep.

Project: git
File: diff.c

static void copy_file_with_prefix(FILE *file,
				  int prefix, const char *data, int size,
				  const char *set, const char *reset)
{
	int ch, nl_just_seen = 1;
	while (0 < size--) {
		ch = *data++;
		if (nl_just_seen) {
			fputs(set, file);
			putc(prefix, file);
		}
		if (ch == '\n') {
			nl_just_seen = 1;
			fputs(reset, file);
		} else
			nl_just_seen = 0;
		putc(ch, file);
	}
	if (!nl_just_seen)
		fprintf(file, "%s\n\\ No newline at end of file\n", reset);
}

Project: git
File: tree-diff.c

static char *malloc_fullname(const char *base, int baselen, const char *path, int pathlen)
{
	char *fullname = xmalloc(baselen + pathlen + 1);
	memcpy(fullname, base, baselen);
	memcpy(fullname + baselen, path, pathlen);
	fullname[baselen + pathlen] = 0;
	return fullname;
}

Project: git
File: diff.c

static unsigned char *deflate_it(char *data,
				 unsigned long size,
				 unsigned long *result_size)
{
	int bound;
	unsigned char *deflated;
	z_stream stream;

	memset(&stream, 0, sizeof(stream));
	deflateInit(&stream, zlib_compression_level);
	bound = deflateBound(&stream, size);
	deflated = xmalloc(bound);
	stream.next_out = deflated;
	stream.avail_out = bound;

	stream.next_in = (unsigned char *)data;
	stream.avail_in = size;
	while (deflate(&stream, Z_FINISH) == Z_OK)
		; /* nothing */
	deflateEnd(&stream);
	*result_size = stream.total_out;
	return deflated;
}

Project: git
File: revision.c

static int still_interesting(struct commit_list *src, unsigned long date, int slop)
{
	/*
	 * No source list at all? We're definitely done..
	 */
	if (!src)
		return 0;

	/*
	 * Does the destination list contain entries with a date
	 * before the source list? Definitely _not_ done.
	 */
	if (date < src->item->date)
		return SLOP;

	/*
	 * Does the source list still have interesting commits in
	 * it? Definitely not done..
	 */
	if (!everybody_uninteresting(src))
		return SLOP;

	/* Ok, we're closing in.. */
	return slop-1;
}

Project: git
File: diff.c

static void diff_words_show(struct diff_words_data *diff_words)
{
	xpparam_t xpp;
	xdemitconf_t xecfg;
	xdemitcb_t ecb;
	mmfile_t minus, plus;
	int i;

	memset(&xecfg, 0, sizeof(xecfg));
	minus.size = diff_words->minus.text.size;
	minus.ptr = xmalloc(minus.size);
	memcpy(minus.ptr, diff_words->minus.text.ptr, minus.size);
	for (i = 0; i < minus.size; i++)
		if (isspace(minus.ptr[i]))
			minus.ptr[i] = '\n';
	diff_words->minus.current = 0;

	plus.size = diff_words->plus.text.size;
	plus.ptr = xmalloc(plus.size);
	memcpy(plus.ptr, diff_words->plus.text.ptr, plus.size);
	for (i = 0; i < plus.size; i++)
		if (isspace(plus.ptr[i]))
			plus.ptr[i] = '\n';
	diff_words->plus.current = 0;

	xpp.flags = XDF_NEED_MINIMAL;
	xecfg.ctxlen = diff_words->minus.alloc + diff_words->plus.alloc;
	ecb.outf = xdiff_outf;
	ecb.priv = diff_words;
	diff_words->xm.consume = fn_out_diff_words_aux;
	xdi_diff(&minus, &plus, &xpp, &xecfg, &ecb);

	free(minus.ptr);
	free(plus.ptr);
	diff_words->minus.text.size = diff_words->plus.text.size = 0;

	if (diff_words->minus.suppressed_newline) {
		putc('\n', diff_words->file);
		diff_words->minus.suppressed_newline = 0;
	}
}

Project: git
File: diff.c

static int is_summary_empty(const struct diff_queue_struct *q)
{
	int i;

	for (i = 0; i < q->nr; i++) {
		const struct diff_filepair *p = q->queue[i];

		switch (p->status) {
		case DIFF_STATUS_DELETED:
		case DIFF_STATUS_ADDED:
		case DIFF_STATUS_COPIED:
		case DIFF_STATUS_RENAMED:
			return 0;
		default:
			if (p->score)
				return 0;
			if (p->one->mode && p->two->mode &&
			    p->one->mode != p->two->mode)
				return 0;
			break;
		}
	}
	return 1;
}

Project: git
File: revision.c

static void handle_one_reflog_commit(unsigned char *sha1, void *cb_data)
{
	struct all_refs_cb *cb = cb_data;
	if (!is_null_sha1(sha1)) {
		struct object *o = parse_object(sha1);
		if (o) {
			o->flags |= cb->all_flags;
			add_pending_object(cb->all_revs, o, "");
		}
		else if (!cb->warned_bad_reflog) {
			warning("reflog of '%s' references pruned commits",
				cb->name_for_errormsg);
			cb->warned_bad_reflog = 1;
		}
	}
}

Project: git
File: tree-diff.c

int diff_root_tree_sha1(const unsigned char *new, const char *base, struct diff_options *opt)
{
	int retval;
	void *tree;
	unsigned long size;
	struct tree_desc empty, real;

	tree = read_object_with_reference(new, tree_type, &size, NULL);
	if (!tree)
		die("unable to read root tree (%s)", sha1_to_hex(new));
	init_tree_desc(&real, tree, size);

	init_tree_desc(&empty, "", 0);
	retval = diff_tree(&empty, &real, base, opt);
	free(tree);
	return retval;
}

Project: git
File: diff.c

static void fn_out_consume(void *priv, char *line, unsigned long len)
{
	int i;
	int color;
	struct emit_callback *ecbdata = priv;
	const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO);
	const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN);
	const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET);

	*(ecbdata->found_changesp) = 1;

	if (ecbdata->label_path[0]) {
		const char *name_a_tab, *name_b_tab;

		name_a_tab = strchr(ecbdata->label_path[0], ' ') ? "\t" : "";
		name_b_tab = strchr(ecbdata->label_path[1], ' ') ? "\t" : "";

		fprintf(ecbdata->file, "%s--- %s%s%s\n",
			meta, ecbdata->label_path[0], reset, name_a_tab);
		fprintf(ecbdata->file, "%s+++ %s%s%s\n",
			meta, ecbdata->label_path[1], reset, name_b_tab);
		ecbdata->label_path[0] = ecbdata->label_path[1] = NULL;
	}

	/* This is not really necessary for now because
	 * this codepath only deals with two-way diffs.
	 */
	for (i = 0; i < len && line[i] == '@'; i++)
		;
	if (2 <= i && i < len && line[i] == ' ') {
		ecbdata->nparents = i - 1;
		len = sane_truncate_line(ecbdata, line, len);
		emit_line(ecbdata->file,
			  diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO),
			  reset, line, len);
		if (line[len-1] != '\n')
			putc('\n', ecbdata->file);
		return;
	}

	if (len < ecbdata->nparents) {
		emit_line(ecbdata->file, reset, reset, line, len);
		return;
	}

	color = DIFF_PLAIN;
	if (ecbdata->diff_words && ecbdata->nparents != 1)
		/* fall back to normal diff */
		free_diff_words_data(ecbdata);
	if (ecbdata->diff_words) {
		if (line[0] == '-') {
			diff_words_append(line, len,
					  &ecbdata->diff_words->minus);
			return;
		} else if (line[0] == '+') {
			diff_words_append(line, len,
					  &ecbdata->diff_words->plus);
			return;
		}
		if (ecbdata->diff_words->minus.text.size ||
		    ecbdata->diff_words->plus.text.size)
			diff_words_show(ecbdata->diff_words);
		line++;
		len--;
		emit_line(ecbdata->file, plain, reset, line, len);
		return;
	}
	for (i = 0; i < ecbdata->nparents && len; i++) {
		if (line[i] == '-')
			color = DIFF_FILE_OLD;
		else if (line[i] == '+')
			color = DIFF_FILE_NEW;
	}

	if (color != DIFF_FILE_NEW) {
		emit_line(ecbdata->file,
			  diff_get_color(ecbdata->color_diff, color),
			  reset, line, len);
		return;
	}
	emit_add_line(reset, ecbdata, line, len);
}

Project: git
File: diff.c

static void run_diff_cmd(const char *pgm,
			 const char *name,
			 const char *other,
			 const char *attr_path,
			 struct diff_filespec *one,
			 struct diff_filespec *two,
			 const char *xfrm_msg,
			 struct diff_options *o,
			 int complete_rewrite)
{
	if (!DIFF_OPT_TST(o, ALLOW_EXTERNAL))
		pgm = NULL;
	else {
		const char *cmd = external_diff_attr(attr_path);
		if (cmd)
			pgm = cmd;
	}

	if (pgm) {
		run_external_diff(pgm, name, other, one, two, xfrm_msg,
				  complete_rewrite);
		return;
	}
	if (one && two)
		builtin_diff(name, other ? other : name,
			     one, two, xfrm_msg, o, complete_rewrite);
	else
		fprintf(o->file, "* Unmerged path %s\n", name);
}

Project: git
File: diff.c

static void show_dirstat(struct diff_options *options)
{
	int i;
	unsigned long changed;
	struct dirstat_dir dir;
	struct diff_queue_struct *q = &diff_queued_diff;

	dir.files = NULL;
	dir.alloc = 0;
	dir.nr = 0;
	dir.percent = options->dirstat_percent;
	dir.cumulative = options->output_format & DIFF_FORMAT_CUMULATIVE;

	changed = 0;
	for (i = 0; i < q->nr; i++) {
		struct diff_filepair *p = q->queue[i];
		const char *name;
		unsigned long copied, added, damage;

		name = p->one->path ? p->one->path : p->two->path;

		if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) {
			diff_populate_filespec(p->one, 0);
			diff_populate_filespec(p->two, 0);
			diffcore_count_changes(p->one, p->two, NULL, NULL, 0,
					       &copied, &added);
			diff_free_filespec_data(p->one);
			diff_free_filespec_data(p->two);
		} else if (DIFF_FILE_VALID(p->one)) {
			diff_populate_filespec(p->one, 1);
			copied = added = 0;
			diff_free_filespec_data(p->one);
		} else if (DIFF_FILE_VALID(p->two)) {
			diff_populate_filespec(p->two, 1);
			copied = 0;
			added = p->two->size;
			diff_free_filespec_data(p->two);
		} else
			continue;

		/*
		 * Original minus copied is the removed material,
		 * added is the new material.  They are both damages
		 * made to the preimage.
		 */
		damage = (p->one->size - copied) + added;

		ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc);
		dir.files[dir.nr].name = name;
		dir.files[dir.nr].changed = damage;
		changed += damage;
		dir.nr++;
	}

	/* This can happen even with many files, if everything was renames */
	if (!changed)
		return;

	/* Show all directories with more than x% of the changes */
	gather_dirstat(options->file, &dir, changed, "", 0);
}

Project: git
File: diff-lib.c

int run_diff_files(struct rev_info *revs, unsigned int option)
{
	int entries, i;
	int diff_unmerged_stage = revs->max_count;
	int silent_on_removed = option & DIFF_SILENT_ON_REMOVED;
	unsigned ce_option = ((option & DIFF_RACY_IS_MODIFIED)
			      ? CE_MATCH_RACY_IS_DIRTY : 0);
	char symcache[PATH_MAX];

	if (diff_unmerged_stage < 0)
		diff_unmerged_stage = 2;
	entries = active_nr;
	symcache[0] = '\0';
	for (i = 0; i < entries; i++) {
		struct stat st;
		unsigned int oldmode, newmode;
		struct cache_entry *ce = active_cache[i];
		int changed;

		if (DIFF_OPT_TST(&revs->diffopt, QUIET) &&
			DIFF_OPT_TST(&revs->diffopt, HAS_CHANGES))
			break;

		if (!ce_path_match(ce, revs->prune_data))
			continue;

		if (ce_stage(ce)) {
			struct combine_diff_path *dpath;
			int num_compare_stages = 0;
			size_t path_len;

			path_len = ce_namelen(ce);

			dpath = xmalloc(combine_diff_path_size(5, path_len));
			dpath->path = (char *) &(dpath->parent[5]);

			dpath->next = NULL;
			dpath->len = path_len;
			memcpy(dpath->path, ce->name, path_len);
			dpath->path[path_len] = '\0';
			hashclr(dpath->sha1);
			memset(&(dpath->parent[0]), 0,
			       sizeof(struct combine_diff_parent)*5);

			changed = check_removed(ce, &st);
			if (!changed)
				dpath->mode = ce_mode_from_stat(ce, st.st_mode);
			else {
				if (changed < 0) {
					perror(ce->name);
					continue;
				}
				if (silent_on_removed)
					continue;
			}

			while (i < entries) {
				struct cache_entry *nce = active_cache[i];
				int stage;

				if (strcmp(ce->name, nce->name))
					break;

				/* Stage #2 (ours) is the first parent,
				 * stage #3 (theirs) is the second.
				 */
				stage = ce_stage(nce);
				if (2 <= stage) {
					int mode = nce->ce_mode;
					num_compare_stages++;
					hashcpy(dpath->parent[stage-2].sha1, nce->sha1);
					dpath->parent[stage-2].mode = ce_mode_from_stat(nce, mode);
					dpath->parent[stage-2].status =
						DIFF_STATUS_MODIFIED;
				}

				/* diff against the proper unmerged stage */
				if (stage == diff_unmerged_stage)
					ce = nce;
				i++;
			}
			/*
			 * Compensate for loop update
			 */
			i--;

			if (revs->combine_merges && num_compare_stages == 2) {
				show_combined_diff(dpath, 2,
						   revs->dense_combined_merges,
						   revs);
				free(dpath);
				continue;
			}
			free(dpath);
			dpath = NULL;

			/*
			 * Show the diff for the 'ce' if we found the one
			 * from the desired stage.
			 */
			diff_unmerge(&revs->diffopt, ce->name, 0, null_sha1);
			if (ce_stage(ce) != diff_unmerged_stage)
				continue;
		}

		if (ce_uptodate(ce))
			continue;

		changed = check_removed(ce, &st);
		if (changed) {
			if (changed < 0) {
				perror(ce->name);
				continue;
			}
			if (silent_on_removed)
				continue;
			diff_addremove(&revs->diffopt, '-', ce->ce_mode,
				       ce->sha1, ce->name);
			continue;
		}
		changed = ce_match_stat(ce, &st, ce_option);
		if (!changed) {
			ce_mark_uptodate(ce);
			if (!DIFF_OPT_TST(&revs->diffopt, FIND_COPIES_HARDER))
				continue;
		}
		oldmode = ce->ce_mode;
		newmode = ce_mode_from_stat(ce, st.st_mode);
		diff_change(&revs->diffopt, oldmode, newmode,
			    ce->sha1, (changed ? null_sha1 : ce->sha1),
			    ce->name);

	}
	diffcore_std(&revs->diffopt);
	diff_flush(&revs->diffopt);
	return 0;
}

Project: git
File: diff.c

static int parse_funcname_pattern(const char *var, const char *ep, const char *value)
{
	const char *name;
	int namelen;
	struct funcname_pattern *pp;

	name = var + 5; /* "diff." */
	namelen = ep - name;

	for (pp = funcname_pattern_list; pp; pp = pp->next)
		if (!strncmp(pp->name, name, namelen) && !pp->name[namelen])
			break;
	if (!pp) {
		pp = xcalloc(1, sizeof(*pp));
		pp->name = xmemdupz(name, namelen);
		pp->next = funcname_pattern_list;
		funcname_pattern_list = pp;
	}
	free(pp->pattern);
	pp->pattern = xstrdup(value);
	return 0;
}

Project: git
File: diff.c

int diff_opt_parse(struct diff_options *options, const char **av, int ac)
{
	const char *arg = av[0];

	/* Output format options */
	if (!strcmp(arg, "-p") || !strcmp(arg, "-u"))
		options->output_format |= DIFF_FORMAT_PATCH;
	else if (opt_arg(arg, 'U', "unified", &options->context))
		options->output_format |= DIFF_FORMAT_PATCH;
	else if (!strcmp(arg, "--raw"))
		options->output_format |= DIFF_FORMAT_RAW;
	else if (!strcmp(arg, "--patch-with-raw"))
		options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_RAW;
	else if (!strcmp(arg, "--numstat"))
		options->output_format |= DIFF_FORMAT_NUMSTAT;
	else if (!strcmp(arg, "--shortstat"))
		options->output_format |= DIFF_FORMAT_SHORTSTAT;
	else if (opt_arg(arg, 'X', "dirstat", &options->dirstat_percent))
		options->output_format |= DIFF_FORMAT_DIRSTAT;
	else if (!strcmp(arg, "--cumulative"))
		options->output_format |= DIFF_FORMAT_CUMULATIVE;
	else if (!strcmp(arg, "--check"))
		options->output_format |= DIFF_FORMAT_CHECKDIFF;
	else if (!strcmp(arg, "--summary"))
		options->output_format |= DIFF_FORMAT_SUMMARY;
	else if (!strcmp(arg, "--patch-with-stat"))
		options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_DIFFSTAT;
	else if (!strcmp(arg, "--name-only"))
		options->output_format |= DIFF_FORMAT_NAME;
	else if (!strcmp(arg, "--name-status"))
		options->output_format |= DIFF_FORMAT_NAME_STATUS;
	else if (!strcmp(arg, "-s"))
		options->output_format |= DIFF_FORMAT_NO_OUTPUT;
	else if (!prefixcmp(arg, "--stat")) {
		char *end;
		int width = options->stat_width;
		int name_width = options->stat_name_width;
		arg += 6;
		end = (char *)arg;

		switch (*arg) {
		case '-':
			if (!prefixcmp(arg, "-width="))
				width = strtoul(arg + 7, &end, 10);
			else if (!prefixcmp(arg, "-name-width="))
				name_width = strtoul(arg + 12, &end, 10);
			break;
		case '=':
			width = strtoul(arg+1, &end, 10);
			if (*end == ',')
				name_width = strtoul(end+1, &end, 10);
		}

		/* Important! This checks all the error cases! */
		if (*end)
			return 0;
		options->output_format |= DIFF_FORMAT_DIFFSTAT;
		options->stat_name_width = name_width;
		options->stat_width = width;
	}

	/* renames options */
	else if (!prefixcmp(arg, "-B")) {
		if ((options->break_opt = diff_scoreopt_parse(arg)) == -1)
			return -1;
	}
	else if (!prefixcmp(arg, "-M")) {
		if ((options->rename_score = diff_scoreopt_parse(arg)) == -1)
			return -1;
		options->detect_rename = DIFF_DETECT_RENAME;
	}
	else if (!prefixcmp(arg, "-C")) {
		if (options->detect_rename == DIFF_DETECT_COPY)
			DIFF_OPT_SET(options, FIND_COPIES_HARDER);
		if ((options->rename_score = diff_scoreopt_parse(arg)) == -1)
			return -1;
		options->detect_rename = DIFF_DETECT_COPY;
	}
	else if (!strcmp(arg, "--no-renames"))
		options->detect_rename = 0;
	else if (!strcmp(arg, "--relative"))
		DIFF_OPT_SET(options, RELATIVE_NAME);
	else if (!prefixcmp(arg, "--relative=")) {
		DIFF_OPT_SET(options, RELATIVE_NAME);
		options->prefix = arg + 11;
	}

	/* xdiff options */
	else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space"))
		options->xdl_opts |= XDF_IGNORE_WHITESPACE;
	else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change"))
		options->xdl_opts |= XDF_IGNORE_WHITESPACE_CHANGE;
	else if (!strcmp(arg, "--ignore-space-at-eol"))
		options->xdl_opts |= XDF_IGNORE_WHITESPACE_AT_EOL;

	/* flags options */
	else if (!strcmp(arg, "--binary")) {
		options->output_format |= DIFF_FORMAT_PATCH;
		DIFF_OPT_SET(options, BINARY);
	}
	else if (!strcmp(arg, "--full-index"))
		DIFF_OPT_SET(options, FULL_INDEX);
	else if (!strcmp(arg, "-a") || !strcmp(arg, "--text"))
		DIFF_OPT_SET(options, TEXT);
	else if (!strcmp(arg, "-R"))
		DIFF_OPT_SET(options, REVERSE_DIFF);
	else if (!strcmp(arg, "--find-copies-harder"))
		DIFF_OPT_SET(options, FIND_COPIES_HARDER);
	else if (!strcmp(arg, "--follow"))
		DIFF_OPT_SET(options, FOLLOW_RENAMES);
	else if (!strcmp(arg, "--color"))
		DIFF_OPT_SET(options, COLOR_DIFF);
	else if (!strcmp(arg, "--no-color"))
		DIFF_OPT_CLR(options, COLOR_DIFF);
	else if (!strcmp(arg, "--color-words"))
		options->flags |= DIFF_OPT_COLOR_DIFF | DIFF_OPT_COLOR_DIFF_WORDS;
	else if (!strcmp(arg, "--exit-code"))
		DIFF_OPT_SET(options, EXIT_WITH_STATUS);
	else if (!strcmp(arg, "--quiet"))
		DIFF_OPT_SET(options, QUIET);
	else if (!strcmp(arg, "--ext-diff"))
		DIFF_OPT_SET(options, ALLOW_EXTERNAL);
	else if (!strcmp(arg, "--no-ext-diff"))
		DIFF_OPT_CLR(options, ALLOW_EXTERNAL);
	else if (!strcmp(arg, "--ignore-submodules"))
		DIFF_OPT_SET(options, IGNORE_SUBMODULES);

	/* misc options */
	else if (!strcmp(arg, "-z"))
		options->line_termination = 0;
	else if (!prefixcmp(arg, "-l"))
		options->rename_limit = strtoul(arg+2, NULL, 10);
	else if (!prefixcmp(arg, "-S"))
		options->pickaxe = arg + 2;
	else if (!strcmp(arg, "--pickaxe-all"))
		options->pickaxe_opts = DIFF_PICKAXE_ALL;
	else if (!strcmp(arg, "--pickaxe-regex"))
		options->pickaxe_opts = DIFF_PICKAXE_REGEX;
	else if (!prefixcmp(arg, "-O"))
		options->orderfile = arg + 2;
	else if (!prefixcmp(arg, "--diff-filter="))
		options->filter = arg + 14;
	else if (!strcmp(arg, "--abbrev"))
		options->abbrev = DEFAULT_ABBREV;
	else if (!prefixcmp(arg, "--abbrev=")) {
		options->abbrev = strtoul(arg + 9, NULL, 10);
		if (options->abbrev < MINIMUM_ABBREV)
			options->abbrev = MINIMUM_ABBREV;
		else if (40 < options->abbrev)
			options->abbrev = 40;
	}
	else if (!prefixcmp(arg, "--src-prefix="))
		options->a_prefix = arg + 13;
	else if (!prefixcmp(arg, "--dst-prefix="))
		options->b_prefix = arg + 13;
	else if (!strcmp(arg, "--no-prefix"))
		options->a_prefix = options->b_prefix = "";
	else if (!prefixcmp(arg, "--output=")) {
		options->file = fopen(arg + strlen("--output="), "w");
		options->close_file = 1;
	} else
		return 0;
	return 1;
}

Project: git
File: diff.c

static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two)
{
	fprintf(file, "GIT binary patch\n");
	emit_binary_diff_body(file, one, two);
	emit_binary_diff_body(file, two, one);
}

Project: git
File: diff.c

static int diff_scoreopt_parse(const char *opt)
{
	int opt1, opt2, cmd;

	if (*opt++ != '-')
		return -1;
	cmd = *opt++;
	if (cmd != 'M' && cmd != 'C' && cmd != 'B')
		return -1; /* that is not a -M, -C nor -B option */

	opt1 = parse_num(&opt);
	if (cmd != 'B')
		opt2 = 0;
	else {
		if (*opt == 0)
			opt2 = 0;
		else if (*opt != '/')
			return -1; /* we expect -B80/99 or -B80 */
		else {
			opt++;
			opt2 = parse_num(&opt);
		}
	}
	if (*opt != 0)
		return -1;
	return opt1 | (opt2 << 16);
}

Project: git
File: revision.c

void add_object(struct object *obj,
		struct object_array *p,
		struct name_path *path,
		const char *name)
{
	add_object_array(obj, path_name(path, name), p);
}

Project: git
File: diff.c

static int diff_populate_gitlink(struct diff_filespec *s, int size_only)
{
	int len;
	char *data = xmalloc(100);
	len = snprintf(data, 100,
		"Subproject commit %s\n", sha1_to_hex(s->sha1));
	s->data = data;
	s->size = len;
	s->should_free = 1;
	if (size_only) {
		s->data = NULL;
		free(data);
	}
	return 0;
}

Project: git
File: diff.c

static void diffcore_apply_filter(const char *filter)
{
	int i;
	struct diff_queue_struct *q = &diff_queued_diff;
	struct diff_queue_struct outq;
	outq.queue = NULL;
	outq.nr = outq.alloc = 0;

	if (!filter)
		return;

	if (strchr(filter, DIFF_STATUS_FILTER_AON)) {
		int found;
		for (i = found = 0; !found && i < q->nr; i++) {
			struct diff_filepair *p = q->queue[i];
			if (((p->status == DIFF_STATUS_MODIFIED) &&
			     ((p->score &&
			       strchr(filter, DIFF_STATUS_FILTER_BROKEN)) ||
			      (!p->score &&
			       strchr(filter, DIFF_STATUS_MODIFIED)))) ||
			    ((p->status != DIFF_STATUS_MODIFIED) &&
			     strchr(filter, p->status)))
				found++;
		}
		if (found)
			return;

		/* otherwise we will clear the whole queue
		 * by copying the empty outq at the end of this
		 * function, but first clear the current entries
		 * in the queue.
		 */
		for (i = 0; i < q->nr; i++)
			diff_free_filepair(q->queue[i]);
	}
	else {
		/* Only the matching ones */
		for (i = 0; i < q->nr; i++) {
			struct diff_filepair *p = q->queue[i];

			if (((p->status == DIFF_STATUS_MODIFIED) &&
			     ((p->score &&
			       strchr(filter, DIFF_STATUS_FILTER_BROKEN)) ||
			      (!p->score &&
			       strchr(filter, DIFF_STATUS_MODIFIED)))) ||
			    ((p->status != DIFF_STATUS_MODIFIED) &&
			     strchr(filter, p->status)))
				diff_q(&outq, p);
			else
				diff_free_filepair(p);
		}
	}
	free(q->queue);
	*q = outq;
}

Project: git
File: diff.c

static void diff_words_append(char *line, unsigned long len,
		struct diff_words_buffer *buffer)
{
	if (buffer->text.size + len > buffer->alloc) {
		buffer->alloc = (buffer->text.size + len) * 3 / 2;
		buffer->text.ptr = xrealloc(buffer->text.ptr, buffer->alloc);
	}
	line++;
	len--;
	memcpy(buffer->text.ptr + buffer->text.size, line, len);
	buffer->text.size += len;
}

Project: git
File: diff.c

static long gather_dirstat(FILE *file, struct dirstat_dir *dir, unsigned long changed, const char *base, int baselen)
{
	unsigned long this_dir = 0;
	unsigned int sources = 0;

	while (dir->nr) {
		struct dirstat_file *f = dir->files;
		int namelen = strlen(f->name);
		unsigned long this;
		char *slash;

		if (namelen < baselen)
			break;
		if (memcmp(f->name, base, baselen))
			break;
		slash = strchr(f->name + baselen, '/');
		if (slash) {
			int newbaselen = slash + 1 - f->name;
			this = gather_dirstat(file, dir, changed, f->name, newbaselen);
			sources++;
		} else {
			this = f->changed;
			dir->files++;
			dir->nr--;
			sources += 2;
		}
		this_dir += this;
	}

	/*
	 * We don't report dirstat's for
	 *  - the top level
	 *  - or cases where everything came from a single directory
	 *    under this directory (sources == 1).
	 */
	if (baselen && sources != 1) {
		int permille = this_dir * 1000 / changed;
		if (permille) {
			int percent = permille / 10;
			if (percent >= dir->percent) {
				fprintf(file, "%4d.%01d%% %.*s\n", percent, permille % 10, baselen, base);
				if (!dir->cumulative)
					return 0;
			}
		}
	}
	return this_dir;
}

Project: git
File: diff-lib.c

static void diff_index_show_file(struct rev_info *revs,
				 const char *prefix,
				 struct cache_entry *ce,
				 const unsigned char *sha1, unsigned int mode)
{
	diff_addremove(&revs->diffopt, prefix[0], mode,
		       sha1, ce->name);
}

Project: git
File: diff.c

const char *diff_get_color(int diff_use_color, enum color_diff ix)
{
	if (diff_use_color)
		return diff_colors[ix];
	return "";
}

Project: git
File: revision.c

void mark_parents_uninteresting(struct commit *commit)
{
	struct commit_list *parents = commit->parents;

	while (parents) {
		struct commit *commit = parents->item;
		if (!(commit->object.flags & UNINTERESTING)) {
			commit->object.flags |= UNINTERESTING;

			/*
			 * Normally we haven't parsed the parent
			 * yet, so we won't have a parent of a parent
			 * here. However, it may turn out that we've
			 * reached this commit some other way (where it
			 * wasn't uninteresting), in which case we need
			 * to mark its parents recursively too..
			 */
			if (commit->parents)
				mark_parents_uninteresting(commit);
		}

		/*
		 * A missing commit is ok iff its parent is marked
		 * uninteresting.
		 *
		 * We just mark such a thing parsed, so that when
		 * it is popped next time around, we won't be trying
		 * to parse it and get an error.
		 */
		if (!has_sha1_file(commit->object.sha1))
			commit->object.parsed = 1;
		parents = parents->next;
	}
}

Project: git
File: tree-diff.c

int diff_tree_sha1(const unsigned char *old, const unsigned char *new, const char *base, struct diff_options *opt)
{
	void *tree1, *tree2;
	struct tree_desc t1, t2;
	unsigned long size1, size2;
	int retval;

	tree1 = read_object_with_reference(old, tree_type, &size1, NULL);
	if (!tree1)
		die("unable to read source tree (%s)", sha1_to_hex(old));
	tree2 = read_object_with_reference(new, tree_type, &size2, NULL);
	if (!tree2)
		die("unable to read destination tree (%s)", sha1_to_hex(new));
	init_tree_desc(&t1, tree1, size1);
	init_tree_desc(&t2, tree2, size2);
	retval = diff_tree(&t1, &t2, base, opt);
	if (DIFF_OPT_TST(opt, FOLLOW_RENAMES) && diff_might_be_rename()) {
		init_tree_desc(&t1, tree1, size1);
		init_tree_desc(&t2, tree2, size2);
		try_to_follow_renames(&t1, &t2, base, opt);
	}
	free(tree1);
	free(tree2);
	return retval;
}

Project: git
File: diff.c

static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o)
{
	if (diff_unmodified_pair(p))
		return;

	if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) ||
	    (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode)))
		return; /* no tree diffs in patch format */

	run_diff(p, o);
}

Project: git
File: diff-lib.c

static void show_new_file(struct oneway_unpack_data *cbdata,
			  struct cache_entry *new,
			  int cached, int match_missing)
{
	const unsigned char *sha1;
	unsigned int mode;
	struct rev_info *revs = cbdata->revs;

	/*
	 * New file in the index: it might actually be different in
	 * the working copy.
	 */
	if (get_stat_data(new, &sha1, &mode, cached, match_missing, cbdata) < 0)
		return;

	diff_index_show_file(revs, "+", new, sha1, mode);
}

Project: git
File: revision.c

static void file_add_remove(struct diff_options *options,
		    int addremove, unsigned mode,
		    const unsigned char *sha1,
		    const char *fullpath)
{
	int diff = REV_TREE_DIFFERENT;

	/*
	 * Is it an add of a new file? It means that the old tree
	 * didn't have it at all, so we will turn "REV_TREE_SAME" ->
	 * "REV_TREE_NEW", but leave any "REV_TREE_DIFFERENT" alone
	 * (and if it already was "REV_TREE_NEW", we'll keep it
	 * "REV_TREE_NEW" of course).
	 */
	if (addremove == '+') {
		diff = tree_difference;
		if (diff != REV_TREE_SAME)
			return;
		diff = REV_TREE_NEW;
	}
	tree_difference = diff;
	if (tree_difference == REV_TREE_DIFFERENT)
		DIFF_OPT_SET(options, HAS_CHANGES);
}

Project: git
File: diff.c

static void remove_tempfile_on_signal(int signo)
{
	remove_tempfile();
	signal(SIGINT, SIG_DFL);
	raise(signo);
}

Project: git
File: revision.c

static void add_message_grep(struct rev_info *revs, const char *pattern)
{
	add_grep(revs, pattern, GREP_PATTERN_BODY);
}

Project: git
File: revision.c

static int add_parents_only(struct rev_info *revs, const char *arg, int flags)
{
	unsigned char sha1[20];
	struct object *it;
	struct commit *commit;
	struct commit_list *parents;

	if (*arg == '^') {
		flags ^= UNINTERESTING;
		arg++;
	}
	if (get_sha1(arg, sha1))
		return 0;
	while (1) {
		it = get_reference(revs, arg, sha1, 0);
		if (it->type != OBJ_TAG)
			break;
		if (!((struct tag*)it)->tagged)
			return 0;
		hashcpy(sha1, ((struct tag*)it)->tagged->sha1);
	}
	if (it->type != OBJ_COMMIT)
		return 0;
	commit = (struct commit *)it;
	for (parents = commit->parents; parents; parents = parents->next) {
		it = &parents->item->object;
		it->flags |= flags;
		add_pending_object(revs, it, arg);
	}
	return 1;
}

Project: git
File: revision.c

static void add_pending_object_with_mode(struct rev_info *revs, struct object *obj, const char *name, unsigned mode)
{
	if (revs->no_walk && (obj->flags & UNINTERESTING))
		die("object ranges do not make sense when not walking revisions");
	if (revs->reflog_info && obj->type == OBJ_COMMIT &&
			add_reflog_for_walk(revs->reflog_info,
				(struct commit *)obj, name))
		return;
	add_object_array_with_mode(obj, name, &revs->pending, mode);
}

Project: git
File: diff.c

static void diff_fill_sha1_info(struct diff_filespec *one)
{
	if (DIFF_FILE_VALID(one)) {
		if (!one->sha1_valid) {
			struct stat st;
			if (!strcmp(one->path, "-")) {
				hashcpy(one->sha1, null_sha1);
				return;
			}
			if (lstat(one->path, &st) < 0)
				die("stat %s", one->path);
			if (index_path(one->sha1, one->path, &st, 0))
				die("cannot hash %s\n", one->path);
		}
	}
	else
		hashclr(one->sha1);
}

Project: git
File: diff.c

int git_diff_basic_config(const char *var, const char *value, void *cb)
{
	if (!prefixcmp(var, "diff.color.") || !prefixcmp(var, "color.diff.")) {
		int slot = parse_diff_color_slot(var, 11);
		if (!value)
			return config_error_nonbool(var);
		color_parse(value, var, diff_colors[slot]);
		return 0;
	}

	if (!prefixcmp(var, "diff.")) {
		const char *ep = strrchr(var, '.');
		if (ep != var + 4) {
			if (!strcmp(ep, ".funcname")) {
				if (!value)
					return config_error_nonbool(var);
				return parse_funcname_pattern(var, ep, value);
			}
		}
	}

	return git_color_default_config(var, value, cb);
}

Project: git
File: diff.c

static void builtin_checkdiff(const char *name_a, const char *name_b,
			      const char *attr_path,
			     struct diff_filespec *one,
			     struct diff_filespec *two, struct diff_options *o)
{
	mmfile_t mf1, mf2;
	struct checkdiff_t data;

	if (!two)
		return;

	memset(&data, 0, sizeof(data));
	data.xm.consume = checkdiff_consume;
	data.filename = name_b ? name_b : name_a;
	data.lineno = 0;
	data.color_diff = DIFF_OPT_TST(o, COLOR_DIFF);
	data.ws_rule = whitespace_rule(attr_path);
	data.file = o->file;

	if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
		die("unable to read files to diff");

	if (diff_filespec_is_binary(two))
		goto free_and_return;
	else {
		/* Crazy xdl interfaces.. */
		xpparam_t xpp;
		xdemitconf_t xecfg;
		xdemitcb_t ecb;

		memset(&xecfg, 0, sizeof(xecfg));
		xpp.flags = XDF_NEED_MINIMAL;
		ecb.outf = xdiff_outf;
		ecb.priv = &data;
		xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
	}
 free_and_return:
	diff_free_filespec_data(one);
	diff_free_filespec_data(two);
	if (data.status)
		DIFF_OPT_SET(o, CHECK_FAILED);
}

Project: git
File: tree-diff.c

void diff_tree_release_paths(struct diff_options *opt)
{
	free(opt->pathlens);
}

Project: git
File: diff.c

static void free_diffstat_info(struct diffstat_t *diffstat)
{
	int i;
	for (i = 0; i < diffstat->nr; i++) {
		struct diffstat_file *f = diffstat->files[i];
		if (f->name != f->print_name)
			free(f->print_name);
		free(f->name);
		free(f->from_name);
		free(f);
	}
	free(diffstat->files);
}

Project: git
File: revision.c

static struct object *get_reference(struct rev_info *revs, const char *name, const unsigned char *sha1, unsigned int flags)
{
	struct object *object;

	object = parse_object(sha1);
	if (!object)
		die("bad object %s", name);
	object->flags |= flags;
	return object;
}

Project: git
File: diff.c

void diff_debug_filepair(const struct diff_filepair *p, int i)
{
	diff_debug_filespec(p->one, i, "one");
	diff_debug_filespec(p->two, i, "two");
	fprintf(stderr, "score %d, status %c rename_used %d broken %d\n",
		p->score, p->status ? p->status : '?',
		p->one->rename_used, p->broken_pair);
}

Project: git
File: diff.c

static int populate_from_stdin(struct diff_filespec *s)
{
	struct strbuf buf;
	size_t size = 0;

	strbuf_init(&buf, 0);
	if (strbuf_read(&buf, 0, 0) < 0)
		return error("error while reading from stdin %s",
				     strerror(errno));

	s->should_munmap = 0;
	s->data = strbuf_detach(&buf, &size);
	s->size = size;
	s->should_free = 1;
	return 0;
}

Project: git
File: diff.c

void diff_setup(struct diff_options *options)
{
	memset(options, 0, sizeof(*options));

	options->file = stdout;

	options->line_termination = '\n';
	options->break_opt = -1;
	options->rename_limit = -1;
	options->dirstat_percent = 3;
	options->context = 3;

	options->change = diff_change;
	options->add_remove = diff_addremove;
	if (diff_use_color_default > 0)
		DIFF_OPT_SET(options, COLOR_DIFF);
	else
		DIFF_OPT_CLR(options, COLOR_DIFF);
	options->detect_rename = diff_detect_rename_default;

	options->a_prefix = "a/";
	options->b_prefix = "b/";
}

Project: git
File: revision.c

static void handle_reflog(struct rev_info *revs, unsigned flags)
{
	struct all_refs_cb cb;
	cb.all_revs = revs;
	cb.all_flags = flags;
	for_each_reflog(handle_one_reflog, &cb);
}

Project: git
File: revision.c

static int commit_match(struct commit *commit, struct rev_info *opt)
{
	if (!opt->grep_filter)
		return 1;
	return grep_buffer(opt->grep_filter,
			   NULL, /* we say nothing, not even filename */
			   commit->buffer, strlen(commit->buffer));
}

Project: git
File: diff.c

static const char *external_diff_attr(const char *name)
{
	struct git_attr_check attr_diff_check;

	if (!name)
		return NULL;

	setup_diff_attr_check(&attr_diff_check);
	if (!git_checkattr(name, 1, &attr_diff_check)) {
		const char *value = attr_diff_check.value;
		if (!ATTR_TRUE(value) &&
		    !ATTR_FALSE(value) &&
		    !ATTR_UNSET(value)) {
			struct ll_diff_driver *drv;

			for (drv = user_diff; drv; drv = drv->next)
				if (!strcmp(drv->name, value))
					return drv->cmd;
		}
	}
	return NULL;
}

Project: git
File: revision.c

static int handle_one_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data)
{
	struct all_refs_cb *cb = cb_data;
	struct object *object = get_reference(cb->all_revs, path, sha1,
					      cb->all_flags);
	add_pending_object(cb->all_revs, object, path);
	return 0;
}

Project: git
File: diff.c

static void builtin_diff(const char *name_a,
			 const char *name_b,
			 struct diff_filespec *one,
			 struct diff_filespec *two,
			 const char *xfrm_msg,
			 struct diff_options *o,
			 int complete_rewrite)
{
	mmfile_t mf1, mf2;
	const char *lbl[2];
	char *a_one, *b_two;
	const char *set = diff_get_color_opt(o, DIFF_METAINFO);
	const char *reset = diff_get_color_opt(o, DIFF_RESET);

	a_one = quote_two(o->a_prefix, name_a + (*name_a == '/'));
	b_two = quote_two(o->b_prefix, name_b + (*name_b == '/'));
	lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null";
	lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null";
	fprintf(o->file, "%sdiff --git %s %s%s\n", set, a_one, b_two, reset);
	if (lbl[0][0] == '/') {
		/* /dev/null */
		fprintf(o->file, "%snew file mode %06o%s\n", set, two->mode, reset);
		if (xfrm_msg && xfrm_msg[0])
			fprintf(o->file, "%s%s%s\n", set, xfrm_msg, reset);
	}
	else if (lbl[1][0] == '/') {
		fprintf(o->file, "%sdeleted file mode %06o%s\n", set, one->mode, reset);
		if (xfrm_msg && xfrm_msg[0])
			fprintf(o->file, "%s%s%s\n", set, xfrm_msg, reset);
	}
	else {
		if (one->mode != two->mode) {
			fprintf(o->file, "%sold mode %06o%s\n", set, one->mode, reset);
			fprintf(o->file, "%snew mode %06o%s\n", set, two->mode, reset);
		}
		if (xfrm_msg && xfrm_msg[0])
			fprintf(o->file, "%s%s%s\n", set, xfrm_msg, reset);
		/*
		 * we do not run diff between different kind
		 * of objects.
		 */
		if ((one->mode ^ two->mode) & S_IFMT)
			goto free_ab_and_return;
		if (complete_rewrite) {
			emit_rewrite_diff(name_a, name_b, one, two, o);
			o->found_changes = 1;
			goto free_ab_and_return;
		}
	}

	if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
		die("unable to read files to diff");

	if (!DIFF_OPT_TST(o, TEXT) &&
	    (diff_filespec_is_binary(one) || diff_filespec_is_binary(two))) {
		/* Quite common confusing case */
		if (mf1.size == mf2.size &&
		    !memcmp(mf1.ptr, mf2.ptr, mf1.size))
			goto free_ab_and_return;
		if (DIFF_OPT_TST(o, BINARY))
			emit_binary_diff(o->file, &mf1, &mf2);
		else
			fprintf(o->file, "Binary files %s and %s differ\n",
				lbl[0], lbl[1]);
		o->found_changes = 1;
	}
	else {
		/* Crazy xdl interfaces.. */
		const char *diffopts = getenv("GIT_DIFF_OPTS");
		xpparam_t xpp;
		xdemitconf_t xecfg;
		xdemitcb_t ecb;
		struct emit_callback ecbdata;
		const char *funcname_pattern;

		funcname_pattern = diff_funcname_pattern(one);
		if (!funcname_pattern)
			funcname_pattern = diff_funcname_pattern(two);

		memset(&xecfg, 0, sizeof(xecfg));
		memset(&ecbdata, 0, sizeof(ecbdata));
		ecbdata.label_path = lbl;
		ecbdata.color_diff = DIFF_OPT_TST(o, COLOR_DIFF);
		ecbdata.found_changesp = &o->found_changes;
		ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a);
		ecbdata.file = o->file;
		xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts;
		xecfg.ctxlen = o->context;
		xecfg.flags = XDL_EMIT_FUNCNAMES;
		if (funcname_pattern)
			xdiff_set_find_func(&xecfg, funcname_pattern);
		if (!diffopts)
			;
		else if (!prefixcmp(diffopts, "--unified="))
			xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10);
		else if (!prefixcmp(diffopts, "-u"))
			xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10);
		ecb.outf = xdiff_outf;
		ecb.priv = &ecbdata;
		ecbdata.xm.consume = fn_out_consume;
		if (DIFF_OPT_TST(o, COLOR_DIFF_WORDS)) {
			ecbdata.diff_words =
				xcalloc(1, sizeof(struct diff_words_data));
			ecbdata.diff_words->file = o->file;
		}
		xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
		if (DIFF_OPT_TST(o, COLOR_DIFF_WORDS))
			free_diff_words_data(&ecbdata);
	}

 free_ab_and_return:
	diff_free_filespec_data(one);
	diff_free_filespec_data(two);
	free(a_one);
	free(b_two);
	return;
}

Project: git
File: diff.c

void diffcore_std(struct diff_options *options)
{
	if (DIFF_OPT_TST(options, QUIET))
		return;

	if (options->skip_stat_unmatch && !DIFF_OPT_TST(options, FIND_COPIES_HARDER))
		diffcore_skip_stat_unmatch(options);
	if (options->break_opt != -1)
		diffcore_break(options->break_opt);
	if (options->detect_rename)
		diffcore_rename(options);
	if (options->break_opt != -1)
		diffcore_merge_broken();
	if (options->pickaxe)
		diffcore_pickaxe(options->pickaxe, options->pickaxe_opts);
	if (options->orderfile)
		diffcore_order(options->orderfile);
	diff_resolve_rename_copy();
	diffcore_apply_filter(options->filter);

	if (diff_queued_diff.nr)
		DIFF_OPT_SET(options, HAS_CHANGES);
	else
		DIFF_OPT_CLR(options, HAS_CHANGES);
}

Project: git
File: revision.c

static struct commit *get_revision_internal(struct rev_info *revs)
{
	struct commit *c = NULL;
	struct commit_list *l;

	if (revs->boundary == 2) {
		/*
		 * All of the normal commits have already been returned,
		 * and we are now returning boundary commits.
		 * create_boundary_commit_list() has populated
		 * revs->commits with the remaining commits to return.
		 */
		c = pop_commit(&revs->commits);
		if (c)
			c->object.flags |= SHOWN;
		return c;
	}

	if (revs->reverse) {
		int limit = -1;

		if (0 <= revs->max_count) {
			limit = revs->max_count;
			if (0 < revs->skip_count)
				limit += revs->skip_count;
		}
		l = NULL;
		while ((c = get_revision_1(revs))) {
			commit_list_insert(c, &l);
			if ((0 < limit) && !--limit)
				break;
		}
		revs->commits = l;
		revs->reverse = 0;
		revs->max_count = -1;
		c = NULL;
	}

	/*
	 * Now pick up what they want to give us
	 */
	c = get_revision_1(revs);
	if (c) {
		while (0 < revs->skip_count) {
			revs->skip_count--;
			c = get_revision_1(revs);
			if (!c)
				break;
		}
	}

	/*
	 * Check the max_count.
	 */
	switch (revs->max_count) {
	case -1:
		break;
	case 0:
		c = NULL;
		break;
	default:
		revs->max_count--;
	}

	if (c)
		c->object.flags |= SHOWN;

	if (!revs->boundary) {
		return c;
	}

	if (!c) {
		/*
		 * get_revision_1() runs out the commits, and
		 * we are done computing the boundaries.
		 * switch to boundary commits output mode.
		 */
		revs->boundary = 2;

		/*
		 * Update revs->commits to contain the list of
		 * boundary commits.
		 */
		create_boundary_commit_list(revs);

		return get_revision_internal(revs);
	}

	/*
	 * boundary commits are the commits that are parents of the
	 * ones we got from get_revision_1() but they themselves are
	 * not returned from get_revision_1().  Before returning
	 * 'c', we need to mark its parents that they could be boundaries.
	 */

	for (l = c->parents; l; l = l->next) {
		struct object *p;
		p = &(l->item->object);
		if (p->flags & (CHILD_SHOWN | SHOWN))
			continue;
		p->flags |= CHILD_SHOWN;
		gc_boundary(&revs->boundary_commits);
		add_object_array(p, NULL, &revs->boundary_commits);
	}

	return c;
}

Project: git
File: diff.c

static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len)
{
	struct diff_words_data *diff_words = priv;

	if (diff_words->minus.suppressed_newline) {
		if (line[0] != '+')
			putc('\n', diff_words->file);
		diff_words->minus.suppressed_newline = 0;
	}

	len--;
	switch (line[0]) {
		case '-':
			print_word(diff_words->file,
				   &diff_words->minus, len, DIFF_FILE_OLD, 1);
			break;
		case '+':
			print_word(diff_words->file,
				   &diff_words->plus, len, DIFF_FILE_NEW, 0);
			break;
		case ' ':
			print_word(diff_words->file,
				   &diff_words->plus, len, DIFF_PLAIN, 0);
			diff_words->minus.current += len;
			break;
	}
}

Project: git
File: tree-diff.c

static void show_entry(struct diff_options *opt, const char *prefix, struct tree_desc *desc,
		       const char *base, int baselen)
{
	unsigned mode;
	const char *path;
	const unsigned char *sha1 = tree_entry_extract(desc, &path, &mode);
	int pathlen = tree_entry_len(path, sha1);

	if (DIFF_OPT_TST(opt, RECURSIVE) && S_ISDIR(mode)) {
		enum object_type type;
		char *newbase = malloc_base(base, baselen, path, pathlen);
		struct tree_desc inner;
		void *tree;
		unsigned long size;

		tree = read_sha1_file(sha1, &type, &size);
		if (!tree || type != OBJ_TREE)
			die("corrupt tree sha %s", sha1_to_hex(sha1));

		init_tree_desc(&inner, tree, size);
		show_tree(opt, prefix, &inner, newbase, baselen + 1 + pathlen);

		free(tree);
		free(newbase);
	} else {
		char *fullname = malloc_fullname(base, baselen, path, pathlen);
		opt->add_remove(opt, prefix[0], mode, sha1, fullname);
		free(fullname);
	}
}

Project: git
File: diff.c

static char *quote_two(const char *one, const char *two)
{
	int need_one = quote_c_style(one, NULL, NULL, 1);
	int need_two = quote_c_style(two, NULL, NULL, 1);
	struct strbuf res;

	strbuf_init(&res, 0);
	if (need_one + need_two) {
		strbuf_addch(&res, '"');
		quote_c_style(one, &res, NULL, 1);
		quote_c_style(two, &res, NULL, 1);
		strbuf_addch(&res, '"');
	} else {
		strbuf_addstr(&res, one);
		strbuf_addstr(&res, two);
	}
	return strbuf_detach(&res, NULL);
}

Project: git
File: diff.c

static void fill_print_name(struct diffstat_file *file)
{
	char *pname;

	if (file->print_name)
		return;

	if (!file->is_renamed) {
		struct strbuf buf;
		strbuf_init(&buf, 0);
		if (quote_c_style(file->name, &buf, NULL, 0)) {
			pname = strbuf_detach(&buf, NULL);
		} else {
			pname = file->name;
			strbuf_release(&buf);
		}
	} else {
		pname = pprint_rename(file->from_name, file->name);
	}
	file->print_name = pname;
}

Project: git
File: diff.c

static void diff_summary(FILE *file, struct diff_filepair *p)
{
	switch(p->status) {
	case DIFF_STATUS_DELETED:
		show_file_mode_name(file, "delete", p->one);
		break;
	case DIFF_STATUS_ADDED:
		show_file_mode_name(file, "create", p->two);
		break;
	case DIFF_STATUS_COPIED:
		show_rename_copy(file, "copy", p);
		break;
	case DIFF_STATUS_RENAMED:
		show_rename_copy(file, "rename", p);
		break;
	default:
		if (p->score) {
			fputs(" rewrite ", file);
			write_name_quoted(p->two->path, file, ' ');
			fprintf(file, "(%d%%)\n", similarity_index(p));
		}
		show_mode_change(file, p, !p->score);
		break;
	}
}

Project: git
File: diff.c

static void diff_filespec_check_attr(struct diff_filespec *one)
{
	struct git_attr_check attr_diff_check;
	int check_from_data = 0;

	if (one->checked_attr)
		return;

	setup_diff_attr_check(&attr_diff_check);
	one->is_binary = 0;
	one->funcname_pattern_ident = NULL;

	if (!git_checkattr(one->path, 1, &attr_diff_check)) {
		const char *value;

		/* binaryness */
		value = attr_diff_check.value;
		if (ATTR_TRUE(value))
			;
		else if (ATTR_FALSE(value))
			one->is_binary = 1;
		else
			check_from_data = 1;

		/* funcname pattern ident */
		if (ATTR_TRUE(value) || ATTR_FALSE(value) || ATTR_UNSET(value))
			;
		else
			one->funcname_pattern_ident = value;
	}

	if (check_from_data) {
		if (!one->data && DIFF_FILE_VALID(one))
			diff_populate_filespec(one, 0);

		if (one->data)
			one->is_binary = buffer_is_binary(one->data, one->size);
	}
}

Project: git
File: diff.c

static void patch_id_consume(void *priv, char *line, unsigned long len)
{
	struct patch_id_t *data = priv;
	int new_len;

	/* Ignore line numbers when computing the SHA1 of the patch */
	if (!prefixcmp(line, "@@ -"))
		return;

	new_len = remove_space(line, len);

	SHA1_Update(data->ctx, line, new_len);
	data->patchlen += new_len;
}

Project: git
File: diff.c

static void setup_diff_attr_check(struct git_attr_check *check)
{
	static struct git_attr *attr_diff;

	if (!attr_diff) {
		attr_diff = git_attr("diff", 4);
	}
	check[0].attr = attr_diff;
}

Project: git
File: revision.c

static int handle_one_reflog(const char *path, const unsigned char *sha1, int flag, void *cb_data)
{
	struct all_refs_cb *cb = cb_data;
	cb->warned_bad_reflog = 0;
	cb->name_for_errormsg = path;
	for_each_reflog_ent(path, handle_one_reflog_ent, cb_data);
	return 0;
}

Project: git
File: diff.c

static void show_numstat(struct diffstat_t* data, struct diff_options *options)
{
	int i;

	if (data->nr == 0)
		return;

	for (i = 0; i < data->nr; i++) {
		struct diffstat_file *file = data->files[i];

		if (file->is_binary)
			fprintf(options->file, "-\t-\t");
		else
			fprintf(options->file,
				"%d\t%d\t", file->added, file->deleted);
		if (options->line_termination) {
			fill_print_name(file);
			if (!file->is_renamed)
				write_name_quoted(file->name, options->file,
						  options->line_termination);
			else {
				fputs(file->print_name, options->file);
				putc(options->line_termination, options->file);
			}
		} else {
			if (file->is_renamed) {
				putc('\0', options->file);
				write_name_quoted(file->from_name, options->file, '\0');
			}
			write_name_quoted(file->name, options->file, '\0');
		}
	}
}

Project: git
File: diff-lib.c

static void do_oneway_diff(struct unpack_trees_options *o,
	struct cache_entry *idx,
	struct cache_entry *tree)
{
	struct oneway_unpack_data *cbdata = o->unpack_data;
	struct rev_info *revs = cbdata->revs;
	int match_missing, cached;

	/*
	 * Backward compatibility wart - "diff-index -m" does
	 * not mean "do not ignore merges", but "match_missing".
	 *
	 * But with the revision flag parsing, that's found in
	 * "!revs->ignore_merges".
	 */
	cached = o->index_only;
	match_missing = !revs->ignore_merges;

	if (cached && idx && ce_stage(idx)) {
		if (tree)
			diff_unmerge(&revs->diffopt, idx->name, idx->ce_mode, idx->sha1);
		return;
	}

	/*
	 * Something added to the tree?
	 */
	if (!tree) {
		show_new_file(cbdata, idx, cached, match_missing);
		return;
	}

	/*
	 * Something removed from the tree?
	 */
	if (!idx) {
		diff_index_show_file(revs, "-", tree, tree->sha1, tree->ce_mode);
		return;
	}

	/* Show difference between old and new */
	show_modified(cbdata, tree, idx, 1, cached, match_missing);
}

Project: git
File: diff.c

const char *diff_unique_abbrev(const unsigned char *sha1, int len)
{
	int abblen;
	const char *abbrev;
	if (len == 40)
		return sha1_to_hex(sha1);

	abbrev = find_unique_abbrev(sha1, len);
	abblen = strlen(abbrev);
	if (abblen < 37) {
		static char hex[41];
		if (len < abblen && abblen <= len + 2)
			sprintf(hex, "%s%.*s", abbrev, len+3-abblen, "..");
		else
			sprintf(hex, "%s...", abbrev);
		return hex;
	}
	return sha1_to_hex(sha1);
}

Project: git
File: diff.c

void free_filespec(struct diff_filespec *spec)
{
	if (!--spec->count) {
		diff_free_filespec_data(spec);
		free(spec);
	}
}

Project: git
File: diff.c

static void emit_add_line(const char *reset, struct emit_callback *ecbdata, const char *line, int len)
{
	const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE);
	const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW);

	if (!*ws)
		emit_line(ecbdata->file, set, reset, line, len);
	else {
		/* Emit just the prefix, then the rest. */
		emit_line(ecbdata->file, set, reset, line, ecbdata->nparents);
		(void)check_and_emit_line(line + ecbdata->nparents,
		    len - ecbdata->nparents, ecbdata->ws_rule,
		    ecbdata->file, set, reset, ws);
	}
}

Project: git
File: diff.c

static int check_pair_status(struct diff_filepair *p)
{
	switch (p->status) {
	case DIFF_STATUS_UNKNOWN:
		return 0;
	case 0:
		die("internal error in diff-resolve-rename-copy");
	default:
		return 1;
	}
}

Project: git
File: revision.c

static int everybody_uninteresting(struct commit_list *orig)
{
	struct commit_list *list = orig;
	while (list) {
		struct commit *commit = list->item;
		list = list->next;
		if (commit->object.flags & UNINTERESTING)
			continue;
		return 0;
	}
	return 1;
}

Project: git
File: revision.c

static void add_grep(struct rev_info *revs, const char *ptn, enum grep_pat_token what)
{
	if (!revs->grep_filter) {
		struct grep_opt *opt = xcalloc(1, sizeof(*opt));
		opt->status_only = 1;
		opt->pattern_tail = &(opt->pattern_list);
		opt->regflags = REG_NEWLINE;
		revs->grep_filter = opt;
	}
	append_grep_pattern(revs->grep_filter, ptn,
			    "command line", 0, what);
}

Project: git
File: diff.c

static int scale_linear(int it, int width, int max_change)
{
	/*
	 * make sure that at least one '-' is printed if there were deletions,
	 * and likewise for '+'.
	 */
	if (max_change < 2)
		return it;
	return ((it - 1) * (width - 1) + max_change - 1) / (max_change - 1);
}

Project: git
File: diff.c

static void free_diff_words_data(struct emit_callback *ecbdata)
{
	if (ecbdata->diff_words) {
		/* flush buffers */
		if (ecbdata->diff_words->minus.text.size ||
				ecbdata->diff_words->plus.text.size)
			diff_words_show(ecbdata->diff_words);

		free (ecbdata->diff_words->minus.text.ptr);
		free (ecbdata->diff_words->plus.text.ptr);
		free(ecbdata->diff_words);
		ecbdata->diff_words = NULL;
	}
}

Project: git
File: diff.c

void diff_debug_queue(const char *msg, struct diff_queue_struct *q)
{
	int i;
	if (msg)
		fprintf(stderr, "%s\n", msg);
	fprintf(stderr, "q->nr = %d\n", q->nr);
	for (i = 0; i < q->nr; i++) {
		struct diff_filepair *p = q->queue[i];
		diff_debug_filepair(p, i);
	}
}

Project: git
File: diff.c

static void run_external_diff(const char *pgm,
			      const char *name,
			      const char *other,
			      struct diff_filespec *one,
			      struct diff_filespec *two,
			      const char *xfrm_msg,
			      int complete_rewrite)
{
	const char *spawn_arg[10];
	struct diff_tempfile *temp = diff_temp;
	int retval;
	static int atexit_asked = 0;
	const char *othername;
	const char **arg = &spawn_arg[0];

	othername = (other? other : name);
	if (one && two) {
		prepare_temp_file(name, &temp[0], one);
		prepare_temp_file(othername, &temp[1], two);
		if (! atexit_asked &&
		    (temp[0].name == temp[0].tmp_path ||
		     temp[1].name == temp[1].tmp_path)) {
			atexit_asked = 1;
			atexit(remove_tempfile);
		}
		signal(SIGINT, remove_tempfile_on_signal);
	}

	if (one && two) {
		*arg++ = pgm;
		*arg++ = name;
		*arg++ = temp[0].name;
		*arg++ = temp[0].hex;
		*arg++ = temp[0].mode;
		*arg++ = temp[1].name;
		*arg++ = temp[1].hex;
		*arg++ = temp[1].mode;
		if (other) {
			*arg++ = other;
			*arg++ = xfrm_msg;
		}
	} else {
		*arg++ = pgm;
		*arg++ = name;
	}
	*arg = NULL;
	fflush(NULL);
	retval = run_command_v_opt(spawn_arg, 0);
	remove_tempfile();
	if (retval) {
		fprintf(stderr, "external diff died, stopping at %s.\n", name);
		exit(1);
	}
}

Project: git
File: diff.c

static int parse_lldiff_command(const char *var, const char *ep, const char *value)
{
	const char *name;
	int namelen;
	struct ll_diff_driver *drv;

	name = var + 5;
	namelen = ep - name;
	for (drv = user_diff; drv; drv = drv->next)
		if (!strncmp(drv->name, name, namelen) && !drv->name[namelen])
			break;
	if (!drv) {
		drv = xcalloc(1, sizeof(struct ll_diff_driver));
		drv->name = xmemdupz(name, namelen);
		if (!user_diff_tail)
			user_diff_tail = &user_diff;
		*user_diff_tail = drv;
		user_diff_tail = &(drv->next);
	}

	return git_config_string(&(drv->cmd), var, value);
}

Project: git
File: revision.c

static struct commit *handle_commit(struct rev_info *revs, struct object *object, const char *name)
{
	unsigned long flags = object->flags;

	/*
	 * Tag object? Look what it points to..
	 */
	while (object->type == OBJ_TAG) {
		struct tag *tag = (struct tag *) object;
		if (revs->tag_objects && !(flags & UNINTERESTING))
			add_pending_object(revs, object, tag->tag);
		if (!tag->tagged)
			die("bad tag");
		object = parse_object(tag->tagged->sha1);
		if (!object)
			die("bad object %s", sha1_to_hex(tag->tagged->sha1));
	}

	/*
	 * Commit object? Just return it, we'll do all the complex
	 * reachability crud.
	 */
	if (object->type == OBJ_COMMIT) {
		struct commit *commit = (struct commit *)object;
		if (parse_commit(commit) < 0)
			die("unable to parse commit %s", name);
		if (flags & UNINTERESTING) {
			commit->object.flags |= UNINTERESTING;
			mark_parents_uninteresting(commit);
			revs->limited = 1;
		}
		return commit;
	}

	/*
	 * Tree object? Either mark it uniniteresting, or add it
	 * to the list of objects to look at later..
	 */
	if (object->type == OBJ_TREE) {
		struct tree *tree = (struct tree *)object;
		if (!revs->tree_objects)
			return NULL;
		if (flags & UNINTERESTING) {
			mark_tree_uninteresting(tree);
			return NULL;
		}
		add_pending_object(revs, object, "");
		return NULL;
	}

	/*
	 * Blob object? You know the drill by now..
	 */
	if (object->type == OBJ_BLOB) {
		struct blob *blob = (struct blob *)object;
		if (!revs->blob_objects)
			return NULL;
		if (flags & UNINTERESTING) {
			mark_blob_uninteresting(blob);
			return NULL;
		}
		add_pending_object(revs, object, "");
		return NULL;
	}
	die("%s is unknown object", name);
}

Project: git
File: diff.c

static void emit_line(FILE *file, const char *set, const char *reset, const char *line, int len)
{
	int has_trailing_newline = (len > 0 && line[len-1] == '\n');
	if (has_trailing_newline)
		len--;

	fputs(set, file);
	fwrite(line, len, 1, file);
	fputs(reset, file);
	if (has_trailing_newline)
		fputc('\n', file);
}

Project: git
File: diff.c

int diff_filespec_is_binary(struct diff_filespec *one)
{
	diff_filespec_check_attr(one);
	return one->is_binary;
}

Project: git
File: diff.c

int diff_unmodified_pair(struct diff_filepair *p)
{
	/* This function is written stricter than necessary to support
	 * the currently implemented transformers, but the idea is to
	 * let transformers to produce diff_filepairs any way they want,
	 * and filter and clean them up here before producing the output.
	 */
	struct diff_filespec *one = p->one, *two = p->two;

	if (DIFF_PAIR_UNMERGED(p))
		return 0; /* unmerged is interesting */

	/* deletion, addition, mode or type change
	 * and rename are all interesting.
	 */
	if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) ||
	    DIFF_PAIR_MODE_CHANGED(p) ||
	    strcmp(one->path, two->path))
		return 0;

	/* both are valid and point at the same path.  that is, we are
	 * dealing with a change.
	 */
	if (one->sha1_valid && two->sha1_valid &&
	    !hashcmp(one->sha1, two->sha1))
		return 1; /* no change */
	if (!one->sha1_valid && !two->sha1_valid)
		return 1; /* both look at the same file on the filesystem. */
	return 0;
}

Project: git
File: revision.c

static int add_parents_to_list(struct rev_info *revs, struct commit *commit, struct commit_list **list)
{
	struct commit_list *parent = commit->parents;
	unsigned left_flag;

	if (commit->object.flags & ADDED)
		return 0;
	commit->object.flags |= ADDED;

	/*
	 * If the commit is uninteresting, don't try to
	 * prune parents - we want the maximal uninteresting
	 * set.
	 *
	 * Normally we haven't parsed the parent
	 * yet, so we won't have a parent of a parent
	 * here. However, it may turn out that we've
	 * reached this commit some other way (where it
	 * wasn't uninteresting), in which case we need
	 * to mark its parents recursively too..
	 */
	if (commit->object.flags & UNINTERESTING) {
		while (parent) {
			struct commit *p = parent->item;
			parent = parent->next;
			if (parse_commit(p) < 0)
				return -1;
			p->object.flags |= UNINTERESTING;
			if (p->parents)
				mark_parents_uninteresting(p);
			if (p->object.flags & SEEN)
				continue;
			p->object.flags |= SEEN;
			insert_by_date(p, list);
		}
		return 0;
	}

	/*
	 * Ok, the commit wasn't uninteresting. Try to
	 * simplify the commit history and find the parent
	 * that has no differences in the path set if one exists.
	 */
	try_to_simplify_commit(revs, commit);

	if (revs->no_walk)
		return 0;

	left_flag = (commit->object.flags & SYMMETRIC_LEFT);

	for (parent = commit->parents; parent; parent = parent->next) {
		struct commit *p = parent->item;

		if (parse_commit(p) < 0)
			return -1;
		p->object.flags |= left_flag;
		if (!(p->object.flags & SEEN)) {
			p->object.flags |= SEEN;
			insert_by_date(p, list);
		}
		if(revs->first_parent_only)
			break;
	}
	return 0;
}

Project: git
File: tree-diff.c

static void skip_uninteresting(struct tree_desc *t, const char *base, int baselen, struct diff_options *opt)
{
	int all_interesting = 0;
	while (t->size) {
		int show;

		if (all_interesting)
			show = 1;
		else {
			show = tree_entry_interesting(t, base, baselen, opt);
			if (show == 2)
				all_interesting = 1;
		}
		if (!show) {
			update_tree_entry(t);
			continue;
		}
		/* Skip it all? */
		if (show < 0)
			t->size = 0;
		return;
	}
}

Project: git
File: diff.c

static char *pprint_rename(const char *a, const char *b)
{
	const char *old = a;
	const char *new = b;
	struct strbuf name;
	int pfx_length, sfx_length;
	int len_a = strlen(a);
	int len_b = strlen(b);
	int a_midlen, b_midlen;
	int qlen_a = quote_c_style(a, NULL, NULL, 0);
	int qlen_b = quote_c_style(b, NULL, NULL, 0);

	strbuf_init(&name, 0);
	if (qlen_a || qlen_b) {
		quote_c_style(a, &name, NULL, 0);
		strbuf_addstr(&name, " => ");
		quote_c_style(b, &name, NULL, 0);
		return strbuf_detach(&name, NULL);
	}

	/* Find common prefix */
	pfx_length = 0;
	while (*old && *new && *old == *new) {
		if (*old == '/')
			pfx_length = old - a + 1;
		old++;
		new++;
	}

	/* Find common suffix */
	old = a + len_a;
	new = b + len_b;
	sfx_length = 0;
	while (a <= old && b <= new && *old == *new) {
		if (*old == '/')
			sfx_length = len_a - (old - a);
		old--;
		new--;
	}

	/*
	 * pfx{mid-a => mid-b}sfx
	 * {pfx-a => pfx-b}sfx
	 * pfx{sfx-a => sfx-b}
	 * name-a => name-b
	 */
	a_midlen = len_a - pfx_length - sfx_length;
	b_midlen = len_b - pfx_length - sfx_length;
	if (a_midlen < 0)
		a_midlen = 0;
	if (b_midlen < 0)
		b_midlen = 0;

	strbuf_grow(&name, pfx_length + a_midlen + b_midlen + sfx_length + 7);
	if (pfx_length + sfx_length) {
		strbuf_add(&name, a, pfx_length);
		strbuf_addch(&name, '{');
	}
	strbuf_add(&name, a + pfx_length, a_midlen);
	strbuf_addstr(&name, " => ");
	strbuf_add(&name, b + pfx_length, b_midlen);
	if (pfx_length + sfx_length) {
		strbuf_addch(&name, '}');
		strbuf_add(&name, a + len_a - sfx_length, sfx_length);
	}
	return strbuf_detach(&name, NULL);
}

Project: git
File: revision.c

static void add_header_grep(struct rev_info *revs, const char *field, const char *pattern)
{
	char *pat;
	const char *prefix;
	int patlen, fldlen;

	fldlen = strlen(field);
	patlen = strlen(pattern);
	pat = xmalloc(patlen + fldlen + 10);
	prefix = ".*";
	if (*pattern == '^') {
		prefix = "";
		pattern++;
	}
	sprintf(pat, "^%s %s%s", field, prefix, pattern);
	add_grep(revs, pat, GREP_PATTERN_HEAD);
}

Project: git
File: diff.c

static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt)
{
	int fmt = opt->output_format;

	if (fmt & DIFF_FORMAT_CHECKDIFF)
		diff_flush_checkdiff(p, opt);
	else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS))
		diff_flush_raw(p, opt);
	else if (fmt & DIFF_FORMAT_NAME) {
		const char *name_a, *name_b;
		name_a = p->two->path;
		name_b = NULL;
		strip_prefix(opt->prefix_length, &name_a, &name_b);
		write_name_quoted(name_a, opt->file, opt->line_termination);
	}
}

Project: git
File: revision.c

int handle_revision_arg(const char *arg, struct rev_info *revs,
			int flags,
			int cant_be_filename)
{
	unsigned mode;
	char *dotdot;
	struct object *object;
	unsigned char sha1[20];
	int local_flags;

	dotdot = strstr(arg, "..");
	if (dotdot) {
		unsigned char from_sha1[20];
		const char *next = dotdot + 2;
		const char *this = arg;
		int symmetric = *next == '.';
		unsigned int flags_exclude = flags ^ UNINTERESTING;

		*dotdot = 0;
		next += symmetric;

		if (!*next)
			next = "HEAD";
		if (dotdot == arg)
			this = "HEAD";
		if (!get_sha1(this, from_sha1) &&
		    !get_sha1(next, sha1)) {
			struct commit *a, *b;
			struct commit_list *exclude;

			a = lookup_commit_reference(from_sha1);
			b = lookup_commit_reference(sha1);
			if (!a || !b) {
				die(symmetric ?
				    "Invalid symmetric difference expression %s...%s" :
				    "Invalid revision range %s..%s",
				    arg, next);
			}

			if (!cant_be_filename) {
				*dotdot = '.';
				verify_non_filename(revs->prefix, arg);
			}

			if (symmetric) {
				exclude = get_merge_bases(a, b, 1);
				add_pending_commit_list(revs, exclude,
							flags_exclude);
				free_commit_list(exclude);
				a->object.flags |= flags | SYMMETRIC_LEFT;
			} else
				a->object.flags |= flags_exclude;
			b->object.flags |= flags;
			add_pending_object(revs, &a->object, this);
			add_pending_object(revs, &b->object, next);
			return 0;
		}
		*dotdot = '.';
	}
	dotdot = strstr(arg, "^@");
	if (dotdot && !dotdot[2]) {
		*dotdot = 0;
		if (add_parents_only(revs, arg, flags))
			return 0;
		*dotdot = '^';
	}
	dotdot = strstr(arg, "^!");
	if (dotdot && !dotdot[2]) {
		*dotdot = 0;
		if (!add_parents_only(revs, arg, flags ^ UNINTERESTING))
			*dotdot = '^';
	}

	local_flags = 0;
	if (*arg == '^') {
		local_flags = UNINTERESTING;
		arg++;
	}
	if (get_sha1_with_mode(arg, sha1, &mode))
		return -1;
	if (!cant_be_filename)
		verify_non_filename(revs->prefix, arg);
	object = get_reference(revs, arg, sha1, flags ^ local_flags);
	add_pending_object_with_mode(revs, object, arg, mode);
	return 0;
}

Project: git
File: tree-diff.c

void diff_tree_setup_paths(const char **p, struct diff_options *opt)
{
	opt->nr_paths = 0;
	opt->pathlens = NULL;
	opt->paths = NULL;

	if (p) {
		int i;

		opt->paths = p;
		opt->nr_paths = count_paths(p);
		if (opt->nr_paths == 0) {
			opt->pathlens = NULL;
			return;
		}
		opt->pathlens = xmalloc(opt->nr_paths * sizeof(int));
		for (i=0; i < opt->nr_paths; i++)
			opt->pathlens[i] = strlen(p[i]);
	}
}

Project: git
File: diff.c

static void diff_flush_checkdiff(struct diff_filepair *p,
		struct diff_options *o)
{
	if (diff_unmodified_pair(p))
		return;

	if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) ||
	    (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode)))
		return; /* no tree diffs in patch format */

	run_checkdiff(p, o);
}

Project: git
File: diff-lib.c

static int get_stat_data(struct cache_entry *ce,
			 const unsigned char **sha1p,
			 unsigned int *modep,
			 int cached, int match_missing,
			 struct oneway_unpack_data *cbdata)
{
	const unsigned char *sha1 = ce->sha1;
	unsigned int mode = ce->ce_mode;

	if (!cached) {
		int changed;
		struct stat st;
		changed = check_removed(ce, &st);
		if (changed < 0)
			return -1;
		else if (changed) {
			if (match_missing) {
				*sha1p = sha1;
				*modep = mode;
				return 0;
			}
			return -1;
		}
		changed = ce_match_stat(ce, &st, 0);
		if (changed) {
			mode = ce_mode_from_stat(ce, st.st_mode);
			sha1 = null_sha1;
		}
	}

	*sha1p = sha1;
	*modep = mode;
	return 0;
}

Project: git
File: diff.c

static void show_stats(struct diffstat_t* data, struct diff_options *options)
{
	int i, len, add, del, total, adds = 0, dels = 0;
	int max_change = 0, max_len = 0;
	int total_files = data->nr;
	int width, name_width;
	const char *reset, *set, *add_c, *del_c;

	if (data->nr == 0)
		return;

	width = options->stat_width ? options->stat_width : 80;
	name_width = options->stat_name_width ? options->stat_name_width : 50;

	/* Sanity: give at least 5 columns to the graph,
	 * but leave at least 10 columns for the name.
	 */
	if (width < name_width + 15) {
		if (name_width <= 25)
			width = name_width + 15;
		else
			name_width = width - 15;
	}

	/* Find the longest filename and max number of changes */
	reset = diff_get_color_opt(options, DIFF_RESET);
	set   = diff_get_color_opt(options, DIFF_PLAIN);
	add_c = diff_get_color_opt(options, DIFF_FILE_NEW);
	del_c = diff_get_color_opt(options, DIFF_FILE_OLD);

	for (i = 0; i < data->nr; i++) {
		struct diffstat_file *file = data->files[i];
		int change = file->added + file->deleted;
		fill_print_name(file);
		len = strlen(file->print_name);
		if (max_len < len)
			max_len = len;

		if (file->is_binary || file->is_unmerged)
			continue;
		if (max_change < change)
			max_change = change;
	}

	/* Compute the width of the graph part;
	 * 10 is for one blank at the beginning of the line plus
	 * " | count " between the name and the graph.
	 *
	 * From here on, name_width is the width of the name area,
	 * and width is the width of the graph area.
	 */
	name_width = (name_width < max_len) ? name_width : max_len;
	if (width < (name_width + 10) + max_change)
		width = width - (name_width + 10);
	else
		width = max_change;

	for (i = 0; i < data->nr; i++) {
		const char *prefix = "";
		char *name = data->files[i]->print_name;
		int added = data->files[i]->added;
		int deleted = data->files[i]->deleted;
		int name_len;

		/*
		 * "scale" the filename
		 */
		len = name_width;
		name_len = strlen(name);
		if (name_width < name_len) {
			char *slash;
			prefix = "...";
			len -= 3;
			name += name_len - len;
			slash = strchr(name, '/');
			if (slash)
				name = slash;
		}

		if (data->files[i]->is_binary) {
			show_name(options->file, prefix, name, len, reset, set);
			fprintf(options->file, "  Bin ");
			fprintf(options->file, "%s%d%s", del_c, deleted, reset);
			fprintf(options->file, " -> ");
			fprintf(options->file, "%s%d%s", add_c, added, reset);
			fprintf(options->file, " bytes");
			fprintf(options->file, "\n");
			continue;
		}
		else if (data->files[i]->is_unmerged) {
			show_name(options->file, prefix, name, len, reset, set);
			fprintf(options->file, "  Unmerged\n");
			continue;
		}
		else if (!data->files[i]->is_renamed &&
			 (added + deleted == 0)) {
			total_files--;
			continue;
		}

		/*
		 * scale the add/delete
		 */
		add = added;
		del = deleted;
		total = add + del;
		adds += add;
		dels += del;

		if (width <= max_change) {
			add = scale_linear(add, width, max_change);
			del = scale_linear(del, width, max_change);
			total = add + del;
		}
		show_name(options->file, prefix, name, len, reset, set);
		fprintf(options->file, "%5d ", added + deleted);
		show_graph(options->file, '+', add, add_c, reset);
		show_graph(options->file, '-', del, del_c, reset);
		fprintf(options->file, "\n");
	}
	fprintf(options->file,
	       "%s %d files changed, %d insertions(+), %d deletions(-)%s\n",
	       set, total_files, adds, dels, reset);
}

Project: git
File: revision.c

void init_revisions(struct rev_info *revs, const char *prefix)
{
	memset(revs, 0, sizeof(*revs));

	revs->abbrev = DEFAULT_ABBREV;
	revs->ignore_merges = 1;
	revs->simplify_history = 1;
	DIFF_OPT_SET(&revs->pruning, RECURSIVE);
	DIFF_OPT_SET(&revs->pruning, QUIET);
	revs->pruning.add_remove = file_add_remove;
	revs->pruning.change = file_change;
	revs->lifo = 1;
	revs->dense = 1;
	revs->prefix = prefix;
	revs->max_age = -1;
	revs->min_age = -1;
	revs->skip_count = -1;
	revs->max_count = -1;

	revs->commit_format = CMIT_FMT_DEFAULT;

	diff_setup(&revs->diffopt);
	if (prefix && !revs->diffopt.prefix) {
		revs->diffopt.prefix = prefix;
		revs->diffopt.prefix_length = strlen(prefix);
	}
}

Project: git
File: revision.c

static int rev_compare_tree(struct rev_info *revs, struct tree *t1, struct tree *t2)
{
	if (!t1)
		return REV_TREE_NEW;
	if (!t2)
		return REV_TREE_DIFFERENT;
	tree_difference = REV_TREE_SAME;
	DIFF_OPT_CLR(&revs->pruning, HAS_CHANGES);
	if (diff_tree_sha1(t1->object.sha1, t2->object.sha1, "",
			   &revs->pruning) < 0)
		return REV_TREE_DIFFERENT;
	return tree_difference;
}

Project: git
File: tree-diff.c

static inline int diff_might_be_rename(void)
{
	return diff_queued_diff.nr == 1 &&
		!DIFF_FILE_VALID(diff_queued_diff.queue[0]->one);
}

Project: git
File: revision.c

static int rewrite_parents(struct rev_info *revs, struct commit *commit)
{
	struct commit_list **pp = &commit->parents;
	while (*pp) {
		struct commit_list *parent = *pp;
		switch (rewrite_one(revs, &parent->item)) {
		case rewrite_one_ok:
			break;
		case rewrite_one_noparents:
			*pp = parent->next;
			continue;
		case rewrite_one_error:
			return -1;
		}
		pp = &parent->next;
	}
	remove_duplicate_parents(commit);
	return 0;
}

Project: git
File: revision.c

static enum rewrite_result rewrite_one(struct rev_info *revs, struct commit **pp)
{
	for (;;) {
		struct commit *p = *pp;
		if (!revs->limited)
			if (add_parents_to_list(revs, p, &revs->commits) < 0)
				return rewrite_one_error;
		if (p->parents && p->parents->next)
			return rewrite_one_ok;
		if (p->object.flags & UNINTERESTING)
			return rewrite_one_ok;
		if (!(p->object.flags & TREESAME))
			return rewrite_one_ok;
		if (!p->parents)
			return rewrite_one_noparents;
		*pp = p->parents->item;
	}
}

Project: git
File: diff.c

static int reuse_worktree_file(const char *name, const unsigned char *sha1, int want_file)
{
	struct cache_entry *ce;
	struct stat st;
	int pos, len;

	/* We do not read the cache ourselves here, because the
	 * benchmark with my previous version that always reads cache
	 * shows that it makes things worse for diff-tree comparing
	 * two linux-2.6 kernel trees in an already checked out work
	 * tree.  This is because most diff-tree comparisons deal with
	 * only a small number of files, while reading the cache is
	 * expensive for a large project, and its cost outweighs the
	 * savings we get by not inflating the object to a temporary
	 * file.  Practically, this code only helps when we are used
	 * by diff-cache --cached, which does read the cache before
	 * calling us.
	 */
	if (!active_cache)
		return 0;

	/* We want to avoid the working directory if our caller
	 * doesn't need the data in a normal file, this system
	 * is rather slow with its stat/open/mmap/close syscalls,
	 * and the object is contained in a pack file.  The pack
	 * is probably already open and will be faster to obtain
	 * the data through than the working directory.  Loose
	 * objects however would tend to be slower as they need
	 * to be individually opened and inflated.
	 */
	if (!FAST_WORKING_DIRECTORY && !want_file && has_sha1_pack(sha1, NULL))
		return 0;

	len = strlen(name);
	pos = cache_name_pos(name, len);
	if (pos < 0)
		return 0;
	ce = active_cache[pos];

	/*
	 * This is not the sha1 we are looking for, or
	 * unreusable because it is not a regular file.
	 */
	if (hashcmp(sha1, ce->sha1) || !S_ISREG(ce->ce_mode))
		return 0;

	/*
	 * If ce matches the file in the work tree, we can reuse it.
	 */
	if (ce_uptodate(ce) ||
	    (!lstat(name, &st) && !ce_match_stat(ce, &st, 0)))
		return 1;

	return 0;
}

Project: git
File: diff.c

void diff_flush(struct diff_options *options)
{
	struct diff_queue_struct *q = &diff_queued_diff;
	int i, output_format = options->output_format;
	int separator = 0;

	/*
	 * Order: raw, stat, summary, patch
	 * or:    name/name-status/checkdiff (other bits clear)
	 */
	if (!q->nr)
		goto free_queue;

	if (output_format & (DIFF_FORMAT_RAW |
			     DIFF_FORMAT_NAME |
			     DIFF_FORMAT_NAME_STATUS |
			     DIFF_FORMAT_CHECKDIFF)) {
		for (i = 0; i < q->nr; i++) {
			struct diff_filepair *p = q->queue[i];
			if (check_pair_status(p))
				flush_one_pair(p, options);
		}
		separator++;
	}

	if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT)) {
		struct diffstat_t diffstat;

		memset(&diffstat, 0, sizeof(struct diffstat_t));
		diffstat.xm.consume = diffstat_consume;
		for (i = 0; i < q->nr; i++) {
			struct diff_filepair *p = q->queue[i];
			if (check_pair_status(p))
				diff_flush_stat(p, options, &diffstat);
		}
		if (output_format & DIFF_FORMAT_NUMSTAT)
			show_numstat(&diffstat, options);
		if (output_format & DIFF_FORMAT_DIFFSTAT)
			show_stats(&diffstat, options);
		if (output_format & DIFF_FORMAT_SHORTSTAT)
			show_shortstats(&diffstat, options);
		free_diffstat_info(&diffstat);
		separator++;
	}
	if (output_format & DIFF_FORMAT_DIRSTAT)
		show_dirstat(options);

	if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) {
		for (i = 0; i < q->nr; i++)
			diff_summary(options->file, q->queue[i]);
		separator++;
	}

	if (output_format & DIFF_FORMAT_PATCH) {
		if (separator) {
			if (options->stat_sep) {
				/* attach patch instead of inline */
				fputs(options->stat_sep, options->file);
			} else {
				putc(options->line_termination, options->file);
			}
		}

		for (i = 0; i < q->nr; i++) {
			struct diff_filepair *p = q->queue[i];
			if (check_pair_status(p))
				diff_flush_patch(p, options);
		}
	}

	if (output_format & DIFF_FORMAT_CALLBACK)
		options->format_callback(q, options, options->format_callback_data);

	for (i = 0; i < q->nr; i++)
		diff_free_filepair(q->queue[i]);
free_queue:
	free(q->queue);
	q->queue = NULL;
	q->nr = q->alloc = 0;
	if (options->close_file)
		fclose(options->file);
}

Project: git
File: diff.c

static void prep_temp_blob(struct diff_tempfile *temp,
			   void *blob,
			   unsigned long size,
			   const unsigned char *sha1,
			   int mode)
{
	int fd;

	fd = git_mkstemp(temp->tmp_path, PATH_MAX, ".diff_XXXXXX");
	if (fd < 0)
		die("unable to create temp-file: %s", strerror(errno));
	if (write_in_full(fd, blob, size) != size)
		die("unable to write temp-file");
	close(fd);
	temp->name = temp->tmp_path;
	strcpy(temp->hex, sha1_to_hex(sha1));
	temp->hex[40] = 0;
	sprintf(temp->mode, "%06o", mode);
}

Project: git
File: diff.c

static void prepare_temp_file(const char *name,
			      struct diff_tempfile *temp,
			      struct diff_filespec *one)
{
	if (!DIFF_FILE_VALID(one)) {
	not_a_valid_file:
		/* A '-' entry produces this for file-2, and
		 * a '+' entry produces this for file-1.
		 */
		temp->name = "/dev/null";
		strcpy(temp->hex, ".");
		strcpy(temp->mode, ".");
		return;
	}

	if (!one->sha1_valid ||
	    reuse_worktree_file(name, one->sha1, 1)) {
		struct stat st;
		if (lstat(name, &st) < 0) {
			if (errno == ENOENT)
				goto not_a_valid_file;
			die("stat(%s): %s", name, strerror(errno));
		}
		if (S_ISLNK(st.st_mode)) {
			int ret;
			char buf[PATH_MAX + 1]; /* ought to be SYMLINK_MAX */
			size_t sz = xsize_t(st.st_size);
			if (sizeof(buf) <= st.st_size)
				die("symlink too long: %s", name);
			ret = readlink(name, buf, sz);
			if (ret < 0)
				die("readlink(%s)", name);
			prep_temp_blob(temp, buf, sz,
				       (one->sha1_valid ?
					one->sha1 : null_sha1),
				       (one->sha1_valid ?
					one->mode : S_IFLNK));
		}
		else {
			/* we can borrow from the file in the work tree */
			temp->name = name;
			if (!one->sha1_valid)
				strcpy(temp->hex, sha1_to_hex(null_sha1));
			else
				strcpy(temp->hex, sha1_to_hex(one->sha1));
			/* Even though we may sometimes borrow the
			 * contents from the work tree, we always want
			 * one->mode.  mode is trustworthy even when
			 * !(one->sha1_valid), as long as
			 * DIFF_FILE_VALID(one).
			 */
			sprintf(temp->mode, "%06o", one->mode);
		}
		return;
	}
	else {
		if (diff_populate_filespec(one, 0))
			die("cannot read data blob for %s", one->path);
		prep_temp_blob(temp, one->data, one->size,
			       one->sha1, one->mode);
	}
}

Project: git
File: revision.c

static int rev_same_tree_as_empty(struct rev_info *revs, struct tree *t1)
{
	int retval;
	void *tree;
	unsigned long size;
	struct tree_desc empty, real;

	if (!t1)
		return 0;

	tree = read_object_with_reference(t1->object.sha1, tree_type, &size, NULL);
	if (!tree)
		return 0;
	init_tree_desc(&real, tree, size);
	init_tree_desc(&empty, "", 0);

	tree_difference = REV_TREE_SAME;
	DIFF_OPT_CLR(&revs->pruning, HAS_CHANGES);
	retval = diff_tree(&empty, &real, "", &revs->pruning);
	free(tree);

	return retval >= 0 && (tree_difference == REV_TREE_SAME);
}

Project: git
File: revision.c

static void add_ignore_packed(struct rev_info *revs, const char *name)
{
	int num = ++revs->num_ignore_packed;

	revs->ignore_packed = xrealloc(revs->ignore_packed,
				       sizeof(const char **) * (num + 1));
	revs->ignore_packed[num-1] = name;
	revs->ignore_packed[num] = NULL;
}

Project: git
File: diff.c

int git_diff_ui_config(const char *var, const char *value, void *cb)
{
	if (!strcmp(var, "diff.renamelimit")) {
		diff_rename_limit_default = git_config_int(var, value);
		return 0;
	}
	if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) {
		diff_use_color_default = git_config_colorbool(var, value, -1);
		return 0;
	}
	if (!strcmp(var, "diff.renames")) {
		if (!value)
			diff_detect_rename_default = DIFF_DETECT_RENAME;
		else if (!strcasecmp(value, "copies") ||
			 !strcasecmp(value, "copy"))
			diff_detect_rename_default = DIFF_DETECT_COPY;
		else if (git_config_bool(var,value))
			diff_detect_rename_default = DIFF_DETECT_RENAME;
		return 0;
	}
	if (!strcmp(var, "diff.autorefreshindex")) {
		diff_auto_refresh_index = git_config_bool(var, value);
		return 0;
	}
	if (!strcmp(var, "diff.external"))
		return git_config_string(&external_diff_cmd_cfg, var, value);
	if (!prefixcmp(var, "diff.")) {
		const char *ep = strrchr(var, '.');

		if (ep != var + 4 && !strcmp(ep, ".command"))
			return parse_lldiff_command(var, ep, value);
	}

	return git_diff_basic_config(var, value, cb);
}

Project: git
File: diff.c

void diff_debug_filespec(struct diff_filespec *s, int x, const char *one)
{
	fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n",
		x, one ? one : "",
		s->path,
		DIFF_FILE_VALID(s) ? "valid" : "invalid",
		s->mode,
		s->sha1_valid ? sha1_to_hex(s->sha1) : "");
	fprintf(stderr, "queue[%d] %s size %lu flags %d\n",
		x, one ? one : "",
		s->size, s->xfrm_flags);
}

Project: git
File: diff.c

static void show_file_mode_name(FILE *file, const char *newdelete, struct diff_filespec *fs)
{
	if (fs->mode)
		fprintf(file, " %s mode %06o ", newdelete, fs->mode);
	else
		fprintf(file, " %s ", newdelete);
	write_name_quoted(fs->path, file, '\n');
}

Project: git
File: revision.c

static void create_boundary_commit_list(struct rev_info *revs)
{
	unsigned i;
	struct commit *c;
	struct object_array *array = &revs->boundary_commits;
	struct object_array_entry *objects = array->objects;

	/*
	 * If revs->commits is non-NULL at this point, an error occurred in
	 * get_revision_1().  Ignore the error and continue printing the
	 * boundary commits anyway.  (This is what the code has always
	 * done.)
	 */
	if (revs->commits) {
		free_commit_list(revs->commits);
		revs->commits = NULL;
	}

	/*
	 * Put all of the actual boundary commits from revs->boundary_commits
	 * into revs->commits
	 */
	for (i = 0; i < array->nr; i++) {
		c = (struct commit *)(objects[i].item);
		if (!c)
			continue;
		if (!(c->object.flags & CHILD_SHOWN))
			continue;
		if (c->object.flags & (SHOWN | BOUNDARY))
			continue;
		c->object.flags |= BOUNDARY;
		commit_list_insert(c, &revs->commits);
	}

	/*
	 * If revs->topo_order is set, sort the boundary commits
	 * in topological order
	 */
	sort_in_topological_order(&revs->commits, revs->lifo);
}

Project: git
File: diff.c

int diff_result_code(struct diff_options *opt, int status)
{
	int result = 0;
	if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) &&
	    !(opt->output_format & DIFF_FORMAT_CHECKDIFF))
		return status;
	if (DIFF_OPT_TST(opt, EXIT_WITH_STATUS) &&
	    DIFF_OPT_TST(opt, HAS_CHANGES))
		result |= 01;
	if ((opt->output_format & DIFF_FORMAT_CHECKDIFF) &&
	    DIFF_OPT_TST(opt, CHECK_FAILED))
		result |= 02;
	return result;
}

Project: git
File: tree-diff.c

static char *malloc_base(const char *base, int baselen, const char *path, int pathlen)
{
	char *newbase = xmalloc(baselen + pathlen + 2);
	memcpy(newbase, base, baselen);
	memcpy(newbase + baselen, path, pathlen);
	memcpy(newbase + baselen + pathlen, "/", 2);
	return newbase;
}

Project: git
File: diff.c

static void print_line_count(FILE *file, int count)
{
	switch (count) {
	case 0:
		fprintf(file, "0,0");
		break;
	case 1:
		fprintf(file, "1");
		break;
	default:
		fprintf(file, "1,%d", count);
		break;
	}
}

Project: git
File: diff.c

void diff_addremove(struct diff_options *options,
		    int addremove, unsigned mode,
		    const unsigned char *sha1,
		    const char *concatpath)
{
	struct diff_filespec *one, *two;

	if (DIFF_OPT_TST(options, IGNORE_SUBMODULES) && S_ISGITLINK(mode))
		return;

	/* This may look odd, but it is a preparation for
	 * feeding "there are unchanged files which should
	 * not produce diffs, but when you are doing copy
	 * detection you would need them, so here they are"
	 * entries to the diff-core.  They will be prefixed
	 * with something like '=' or '*' (I haven't decided
	 * which but should not make any difference).
	 * Feeding the same new and old to diff_change()
	 * also has the same effect.
	 * Before the final output happens, they are pruned after
	 * merged into rename/copy pairs as appropriate.
	 */
	if (DIFF_OPT_TST(options, REVERSE_DIFF))
		addremove = (addremove == '+' ? '-' :
			     addremove == '-' ? '+' : addremove);

	if (options->prefix &&
	    strncmp(concatpath, options->prefix, options->prefix_length))
		return;

	one = alloc_filespec(concatpath);
	two = alloc_filespec(concatpath);

	if (addremove != '+')
		fill_filespec(one, sha1, mode);
	if (addremove != '-')
		fill_filespec(two, sha1, mode);

	diff_queue(&diff_queued_diff, one, two);
	DIFF_OPT_SET(options, HAS_CHANGES);
}

Project: git
File: diff.c

static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one)
{
	if (!DIFF_FILE_VALID(one)) {
		mf->ptr = (char *)""; /* does not matter */
		mf->size = 0;
		return 0;
	}
	else if (diff_populate_filespec(one, 0))
		return -1;
	mf->ptr = one->data;
	mf->size = one->size;
	return 0;
}

Project: git
File: diff.c

static void run_diff(struct diff_filepair *p, struct diff_options *o)
{
	const char *pgm = external_diff();
	struct strbuf msg;
	char *xfrm_msg;
	struct diff_filespec *one = p->one;
	struct diff_filespec *two = p->two;
	const char *name;
	const char *other;
	const char *attr_path;
	int complete_rewrite = 0;

	name  = p->one->path;
	other = (strcmp(name, p->two->path) ? p->two->path : NULL);
	attr_path = name;
	if (o->prefix_length)
		strip_prefix(o->prefix_length, &name, &other);

	if (DIFF_PAIR_UNMERGED(p)) {
		run_diff_cmd(pgm, name, NULL, attr_path,
			     NULL, NULL, NULL, o, 0);
		return;
	}

	diff_fill_sha1_info(one);
	diff_fill_sha1_info(two);

	strbuf_init(&msg, PATH_MAX * 2 + 300);
	switch (p->status) {
	case DIFF_STATUS_COPIED:
		strbuf_addf(&msg, "similarity index %d%%", similarity_index(p));
		strbuf_addstr(&msg, "\ncopy from ");
		quote_c_style(name, &msg, NULL, 0);
		strbuf_addstr(&msg, "\ncopy to ");
		quote_c_style(other, &msg, NULL, 0);
		strbuf_addch(&msg, '\n');
		break;
	case DIFF_STATUS_RENAMED:
		strbuf_addf(&msg, "similarity index %d%%", similarity_index(p));
		strbuf_addstr(&msg, "\nrename from ");
		quote_c_style(name, &msg, NULL, 0);
		strbuf_addstr(&msg, "\nrename to ");
		quote_c_style(other, &msg, NULL, 0);
		strbuf_addch(&msg, '\n');
		break;
	case DIFF_STATUS_MODIFIED:
		if (p->score) {
			strbuf_addf(&msg, "dissimilarity index %d%%\n",
					similarity_index(p));
			complete_rewrite = 1;
			break;
		}
		/* fallthru */
	default:
		/* nothing */
		;
	}

	if (hashcmp(one->sha1, two->sha1)) {
		int abbrev = DIFF_OPT_TST(o, FULL_INDEX) ? 40 : DEFAULT_ABBREV;

		if (DIFF_OPT_TST(o, BINARY)) {
			mmfile_t mf;
			if ((!fill_mmfile(&mf, one) && diff_filespec_is_binary(one)) ||
			    (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two)))
				abbrev = 40;
		}
		strbuf_addf(&msg, "index %.*s..%.*s",
				abbrev, sha1_to_hex(one->sha1),
				abbrev, sha1_to_hex(two->sha1));
		if (one->mode == two->mode)
			strbuf_addf(&msg, " %06o", one->mode);
		strbuf_addch(&msg, '\n');
	}

	if (msg.len)
		strbuf_setlen(&msg, msg.len - 1);
	xfrm_msg = msg.len ? msg.buf : NULL;

	if (!pgm &&
	    DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) &&
	    (S_IFMT & one->mode) != (S_IFMT & two->mode)) {
		/* a filepair that changes between file and symlink
		 * needs to be split into deletion and creation.
		 */
		struct diff_filespec *null = alloc_filespec(two->path);
		run_diff_cmd(NULL, name, other, attr_path,
			     one, null, xfrm_msg, o, 0);
		free(null);
		null = alloc_filespec(one->path);
		run_diff_cmd(NULL, name, other, attr_path,
			     null, two, xfrm_msg, o, 0);
		free(null);
	}
	else
		run_diff_cmd(pgm, name, other, attr_path,
			     one, two, xfrm_msg, o, complete_rewrite);

	strbuf_release(&msg);
}

Project: git
File: diff.c

void diff_change(struct diff_options *options,
		 unsigned old_mode, unsigned new_mode,
		 const unsigned char *old_sha1,
		 const unsigned char *new_sha1,
		 const char *concatpath)
{
	struct diff_filespec *one, *two;

	if (DIFF_OPT_TST(options, IGNORE_SUBMODULES) && S_ISGITLINK(old_mode)
			&& S_ISGITLINK(new_mode))
		return;

	if (DIFF_OPT_TST(options, REVERSE_DIFF)) {
		unsigned tmp;
		const unsigned char *tmp_c;
		tmp = old_mode; old_mode = new_mode; new_mode = tmp;
		tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c;
	}

	if (options->prefix &&
	    strncmp(concatpath, options->prefix, options->prefix_length))
		return;

	one = alloc_filespec(concatpath);
	two = alloc_filespec(concatpath);
	fill_filespec(one, old_sha1, old_mode);
	fill_filespec(two, new_sha1, new_mode);

	diff_queue(&diff_queued_diff, one, two);
	DIFF_OPT_SET(options, HAS_CHANGES);
}

Project: git
File: diff-lib.c

static int show_modified(struct oneway_unpack_data *cbdata,
			 struct cache_entry *old,
			 struct cache_entry *new,
			 int report_missing,
			 int cached, int match_missing)
{
	unsigned int mode, oldmode;
	const unsigned char *sha1;
	struct rev_info *revs = cbdata->revs;

	if (get_stat_data(new, &sha1, &mode, cached, match_missing, cbdata) < 0) {
		if (report_missing)
			diff_index_show_file(revs, "-", old,
					     old->sha1, old->ce_mode);
		return -1;
	}

	if (revs->combine_merges && !cached &&
	    (hashcmp(sha1, old->sha1) || hashcmp(old->sha1, new->sha1))) {
		struct combine_diff_path *p;
		int pathlen = ce_namelen(new);

		p = xmalloc(combine_diff_path_size(2, pathlen));
		p->path = (char *) &p->parent[2];
		p->next = NULL;
		p->len = pathlen;
		memcpy(p->path, new->name, pathlen);
		p->path[pathlen] = 0;
		p->mode = mode;
		hashclr(p->sha1);
		memset(p->parent, 0, 2 * sizeof(struct combine_diff_parent));
		p->parent[0].status = DIFF_STATUS_MODIFIED;
		p->parent[0].mode = new->ce_mode;
		hashcpy(p->parent[0].sha1, new->sha1);
		p->parent[1].status = DIFF_STATUS_MODIFIED;
		p->parent[1].mode = old->ce_mode;
		hashcpy(p->parent[1].sha1, old->sha1);
		show_combined_diff(p, 2, revs->dense_combined_merges, revs);
		free(p);
		return 0;
	}

	oldmode = old->ce_mode;
	if (mode == oldmode && !hashcmp(sha1, old->sha1) &&
	    !DIFF_OPT_TST(&revs->diffopt, FIND_COPIES_HARDER))
		return 0;

	diff_change(&revs->diffopt, oldmode, mode,
		    old->sha1, sha1, old->name);
	return 0;
}

Project: git
File: diff.c

static void checkdiff_consume(void *priv, char *line, unsigned long len)
{
	struct checkdiff_t *data = priv;
	const char *ws = diff_get_color(data->color_diff, DIFF_WHITESPACE);
	const char *reset = diff_get_color(data->color_diff, DIFF_RESET);
	const char *set = diff_get_color(data->color_diff, DIFF_FILE_NEW);
	char *err;

	if (line[0] == '+') {
		unsigned bad;
		data->lineno++;
		bad = check_and_emit_line(line + 1, len - 1,
		    data->ws_rule, NULL, NULL, NULL, NULL);
		if (!bad)
			return;
		data->status |= bad;
		err = whitespace_error_string(bad);
		fprintf(data->file, "%s:%d: %s.\n", data->filename, data->lineno, err);
		free(err);
		emit_line(data->file, set, reset, line, 1);
		(void)check_and_emit_line(line + 1, len - 1, data->ws_rule,
		    data->file, set, reset, ws);
	} else if (line[0] == ' ')
		data->lineno++;
	else if (line[0] == '@') {
		char *plus = strchr(line, '+');
		if (plus)
			data->lineno = strtol(plus, NULL, 10) - 1;
		else
			die("invalid diff");
	}
}

Project: git
File: diff.c

static int count_lines(const char *data, int size)
{
	int count, ch, completely_empty = 1, nl_just_seen = 0;
	count = 0;
	while (0 < size--) {
		ch = *data++;
		if (ch == '\n') {
			count++;
			nl_just_seen = 1;
			completely_empty = 0;
		}
		else {
			nl_just_seen = 0;
			completely_empty = 0;
		}
	}
	if (completely_empty)
		return 0;
	if (!nl_just_seen)
		count++; /* no trailing newline */
	return count;
}

Project: git
File: diff.c

static void emit_binary_diff_body(FILE *file, mmfile_t *one, mmfile_t *two)
{
	void *cp;
	void *delta;
	void *deflated;
	void *data;
	unsigned long orig_size;
	unsigned long delta_size;
	unsigned long deflate_size;
	unsigned long data_size;

	/* We could do deflated delta, or we could do just deflated two,
	 * whichever is smaller.
	 */
	delta = NULL;
	deflated = deflate_it(two->ptr, two->size, &deflate_size);
	if (one->size && two->size) {
		delta = diff_delta(one->ptr, one->size,
				   two->ptr, two->size,
				   &delta_size, deflate_size);
		if (delta) {
			void *to_free = delta;
			orig_size = delta_size;
			delta = deflate_it(delta, delta_size, &delta_size);
			free(to_free);
		}
	}

	if (delta && delta_size < deflate_size) {
		fprintf(file, "delta %lu\n", orig_size);
		free(deflated);
		data = delta;
		data_size = delta_size;
	}
	else {
		fprintf(file, "literal %lu\n", two->size);
		free(delta);
		data = deflated;
		data_size = deflate_size;
	}

	/* emit data encoded in base85 */
	cp = data;
	while (data_size) {
		int bytes = (52 < data_size) ? 52 : data_size;
		char line[70];
		data_size -= bytes;
		if (bytes <= 26)
			line[0] = bytes + 'A' - 1;
		else
			line[0] = bytes - 26 + 'a' - 1;
		encode_85(line + 1, cp, bytes);
		cp = (char *) cp + bytes;
		fputs(line, file);
		fputc('\n', file);
	}
	fprintf(file, "\n");
	free(data);
}

Project: git
File: revision.c

static void mark_blob_uninteresting(struct blob *blob)
{
	if (!blob)
		return;
	if (blob->object.flags & UNINTERESTING)
		return;
	blob->object.flags |= UNINTERESTING;
}

Project: git
File: tree-diff.c

static void show_tree(struct diff_options *opt, const char *prefix, struct tree_desc *desc, const char *base, int baselen)
{
	int all_interesting = 0;
	while (desc->size) {
		int show;

		if (all_interesting)
			show = 1;
		else {
			show = tree_entry_interesting(desc, base, baselen,
						      opt);
			if (show == 2)
				all_interesting = 1;
		}
		if (show < 0)
			break;
		if (show)
			show_entry(opt, prefix, desc, base, baselen);
		update_tree_entry(desc);
	}
}

Project: git
File: revision.c

static void gc_boundary(struct object_array *array)
{
	unsigned nr = array->nr;
	unsigned alloc = array->alloc;
	struct object_array_entry *objects = array->objects;

	if (alloc <= nr) {
		unsigned i, j;
		for (i = j = 0; i < nr; i++) {
			if (objects[i].item->flags & SHOWN)
				continue;
			if (i != j)
				objects[j] = objects[i];
			j++;
		}
		for (i = j; i < nr; i++)
			objects[i].item = NULL;
		array->nr = j;
	}
}

Project: git
File: diff.c

int diff_queue_is_empty(void)
{
	struct diff_queue_struct *q = &diff_queued_diff;
	int i;
	for (i = 0; i < q->nr; i++)
		if (!diff_unmodified_pair(q->queue[i]))
			return 0;
	return 1;
}

Project: git
File: diff.c

static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o,
			    struct diffstat_t *diffstat)
{
	if (diff_unmodified_pair(p))
		return;

	if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) ||
	    (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode)))
		return; /* no tree diffs in patch format */

	run_diffstat(p, o, diffstat);
}

Project: git
File: diff-lib.c

static void mark_merge_entries(void)
{
	int i;
	for (i = 0; i < active_nr; i++) {
		struct cache_entry *ce = active_cache[i];
		if (!ce_stage(ce))
			continue;
		ce->ce_flags |= CE_STAGEMASK;
	}
}

Project: git
File: diff.c

static void emit_rewrite_diff(const char *name_a,
			      const char *name_b,
			      struct diff_filespec *one,
			      struct diff_filespec *two,
			      struct diff_options *o)
{
	int lc_a, lc_b;
	int color_diff = DIFF_OPT_TST(o, COLOR_DIFF);
	const char *name_a_tab, *name_b_tab;
	const char *metainfo = diff_get_color(color_diff, DIFF_METAINFO);
	const char *fraginfo = diff_get_color(color_diff, DIFF_FRAGINFO);
	const char *old = diff_get_color(color_diff, DIFF_FILE_OLD);
	const char *new = diff_get_color(color_diff, DIFF_FILE_NEW);
	const char *reset = diff_get_color(color_diff, DIFF_RESET);
	static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT;

	name_a += (*name_a == '/');
	name_b += (*name_b == '/');
	name_a_tab = strchr(name_a, ' ') ? "\t" : "";
	name_b_tab = strchr(name_b, ' ') ? "\t" : "";

	strbuf_reset(&a_name);
	strbuf_reset(&b_name);
	quote_two_c_style(&a_name, o->a_prefix, name_a, 0);
	quote_two_c_style(&b_name, o->b_prefix, name_b, 0);

	diff_populate_filespec(one, 0);
	diff_populate_filespec(two, 0);
	lc_a = count_lines(one->data, one->size);
	lc_b = count_lines(two->data, two->size);
	fprintf(o->file,
		"%s--- %s%s%s\n%s+++ %s%s%s\n%s@@ -",
		metainfo, a_name.buf, name_a_tab, reset,
		metainfo, b_name.buf, name_b_tab, reset, fraginfo);
	print_line_count(o->file, lc_a);
	fprintf(o->file, " +");
	print_line_count(o->file, lc_b);
	fprintf(o->file, " @@%s\n", reset);
	if (lc_a)
		copy_file_with_prefix(o->file, '-', one->data, one->size, old, reset);
	if (lc_b)
		copy_file_with_prefix(o->file, '+', two->data, two->size, new, reset);
}

Project: git
File: revision.c

static void cherry_pick_list(struct commit_list *list, struct rev_info *revs)
{
	struct commit_list *p;
	int left_count = 0, right_count = 0;
	int left_first;
	struct patch_ids ids;

	/* First count the commits on the left and on the right */
	for (p = list; p; p = p->next) {
		struct commit *commit = p->item;
		unsigned flags = commit->object.flags;
		if (flags & BOUNDARY)
			;
		else if (flags & SYMMETRIC_LEFT)
			left_count++;
		else
			right_count++;
	}

	left_first = left_count < right_count;
	init_patch_ids(&ids);
	if (revs->diffopt.nr_paths) {
		ids.diffopts.nr_paths = revs->diffopt.nr_paths;
		ids.diffopts.paths = revs->diffopt.paths;
		ids.diffopts.pathlens = revs->diffopt.pathlens;
	}

	/* Compute patch-ids for one side */
	for (p = list; p; p = p->next) {
		struct commit *commit = p->item;
		unsigned flags = commit->object.flags;

		if (flags & BOUNDARY)
			continue;
		/*
		 * If we have fewer left, left_first is set and we omit
		 * commits on the right branch in this loop.  If we have
		 * fewer right, we skip the left ones.
		 */
		if (left_first != !!(flags & SYMMETRIC_LEFT))
			continue;
		commit->util = add_commit_patch_id(commit, &ids);
	}

	/* Check the other side */
	for (p = list; p; p = p->next) {
		struct commit *commit = p->item;
		struct patch_id *id;
		unsigned flags = commit->object.flags;

		if (flags & BOUNDARY)
			continue;
		/*
		 * If we have fewer left, left_first is set and we omit
		 * commits on the left branch in this loop.
		 */
		if (left_first == !!(flags & SYMMETRIC_LEFT))
			continue;

		/*
		 * Have we seen the same patch id?
		 */
		id = has_commit_patch_id(commit, &ids);
		if (!id)
			continue;
		id->seen = 1;
		commit->object.flags |= SHOWN;
	}

	/* Now check the original side for seen ones */
	for (p = list; p; p = p->next) {
		struct commit *commit = p->item;
		struct patch_id *ent;

		ent = commit->util;
		if (!ent)
			continue;
		if (ent->seen)
			commit->object.flags |= SHOWN;
		commit->util = NULL;
	}

	free_patch_ids(&ids);
}

Project: git
File: diff-lib.c

static int oneway_diff(struct cache_entry **src, struct unpack_trees_options *o)
{
	struct cache_entry *idx = src[0];
	struct cache_entry *tree = src[1];
	struct oneway_unpack_data *cbdata = o->unpack_data;
	struct rev_info *revs = cbdata->revs;

	if (idx && ce_stage(idx))
		skip_same_name(idx, o);

	/*
	 * Unpack-trees generates a DF/conflict entry if
	 * there was a directory in the index and a tree
	 * in the tree. From a diff standpoint, that's a
	 * delete of the tree and a create of the file.
	 */
	if (tree == o->df_conflict_entry)
		tree = NULL;

	if (ce_path_match(idx ? idx : tree, revs->prune_data))
		do_oneway_diff(o, idx, tree);

	return 0;
}

Project: git
File: revision.c

static struct commit *get_revision_1(struct rev_info *revs)
{
	if (!revs->commits)
		return NULL;

	do {
		struct commit_list *entry = revs->commits;
		struct commit *commit = entry->item;

		revs->commits = entry->next;
		free(entry);

		if (revs->reflog_info)
			fake_reflog_parent(revs->reflog_info, commit);

		/*
		 * If we haven't done the list limiting, we need to look at
		 * the parents here. We also need to do the date-based limiting
		 * that we'd otherwise have done in limit_list().
		 */
		if (!revs->limited) {
			if (revs->max_age != -1 &&
			    (commit->date < revs->max_age))
				continue;
			if (add_parents_to_list(revs, commit, &revs->commits) < 0)
				return NULL;
		}

		switch (simplify_commit(revs, commit)) {
		case commit_ignore:
			continue;
		case commit_error:
			return NULL;
		default:
			return commit;
		}
	} while (revs->commits);
	return NULL;
}

Project: git
File: diff.c

int diff_populate_filespec(struct diff_filespec *s, int size_only)
{
	int err = 0;
	if (!DIFF_FILE_VALID(s))
		die("internal error: asking to populate invalid file.");
	if (S_ISDIR(s->mode))
		return -1;

	if (s->data)
		return 0;

	if (size_only && 0 < s->size)
		return 0;

	if (S_ISGITLINK(s->mode))
		return diff_populate_gitlink(s, size_only);

	if (!s->sha1_valid ||
	    reuse_worktree_file(s->path, s->sha1, 0)) {
		struct strbuf buf;
		struct stat st;
		int fd;

		if (!strcmp(s->path, "-"))
			return populate_from_stdin(s);

		if (lstat(s->path, &st) < 0) {
			if (errno == ENOENT) {
			err_empty:
				err = -1;
			empty:
				s->data = (char *)"";
				s->size = 0;
				return err;
			}
		}
		s->size = xsize_t(st.st_size);
		if (!s->size)
			goto empty;
		if (size_only)
			return 0;
		if (S_ISLNK(st.st_mode)) {
			int ret;
			s->data = xmalloc(s->size);
			s->should_free = 1;
			ret = readlink(s->path, s->data, s->size);
			if (ret < 0) {
				free(s->data);
				goto err_empty;
			}
			return 0;
		}
		fd = open(s->path, O_RDONLY);
		if (fd < 0)
			goto err_empty;
		s->data = xmmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0);
		close(fd);
		s->should_munmap = 1;

		/*
		 * Convert from working tree format to canonical git format
		 */
		strbuf_init(&buf, 0);
		if (convert_to_git(s->path, s->data, s->size, &buf, safe_crlf)) {
			size_t size = 0;
			munmap(s->data, s->size);
			s->should_munmap = 0;
			s->data = strbuf_detach(&buf, &size);
			s->size = size;
			s->should_free = 1;
		}
	}
	else {
		enum object_type type;
		if (size_only)
			type = sha1_object_info(s->sha1, &s->size);
		else {
			s->data = read_sha1_file(s->sha1, &type, &s->size);
			s->should_free = 1;
		}
	}
	return 0;
}

Project: git
File: diff.c

static void show_name(FILE *file,
		      const char *prefix, const char *name, int len,
		      const char *reset, const char *set)
{
	fprintf(file, " %s%s%-*s%s |", set, prefix, len, name, reset);
}

Project: git
File: diff.c

void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp)
{
	if (queue->alloc <= queue->nr) {
		queue->alloc = alloc_nr(queue->alloc);
		queue->queue = xrealloc(queue->queue,
					sizeof(dp) * queue->alloc);
	}
	queue->queue[queue->nr++] = dp;
}

Project: git
File: revision.c

void add_pending_object(struct rev_info *revs, struct object *obj, const char *name)
{
	add_pending_object_with_mode(revs, obj, name, S_IFINVALID);
}

Project: git
File: revision.c

static int limit_list(struct rev_info *revs)
{
	int slop = SLOP;
	unsigned long date = ~0ul;
	struct commit_list *list = revs->commits;
	struct commit_list *newlist = NULL;
	struct commit_list **p = &newlist;

	while (list) {
		struct commit_list *entry = list;
		struct commit *commit = list->item;
		struct object *obj = &commit->object;
		show_early_output_fn_t show;

		list = list->next;
		free(entry);

		if (revs->max_age != -1 && (commit->date < revs->max_age))
			obj->flags |= UNINTERESTING;
		if (add_parents_to_list(revs, commit, &list) < 0)
			return -1;
		if (obj->flags & UNINTERESTING) {
			mark_parents_uninteresting(commit);
			if (revs->show_all)
				p = &commit_list_insert(commit, p)->next;
			slop = still_interesting(list, date, slop);
			if (slop)
				continue;
			/* If showing all, add the whole pending list to the end */
			if (revs->show_all)
				*p = list;
			break;
		}
		if (revs->min_age != -1 && (commit->date > revs->min_age))
			continue;
		date = commit->date;
		p = &commit_list_insert(commit, p)->next;

		show = show_early_output;
		if (!show)
			continue;

		show(revs, newlist);
		show_early_output = NULL;
	}
	if (revs->cherry_pick)
		cherry_pick_list(newlist, revs);

	revs->commits = newlist;
	return 0;
}

Project: git
File: diff.c

static void show_rename_copy(FILE *file, const char *renamecopy, struct diff_filepair *p)
{
	char *names = pprint_rename(p->one->path, p->two->path);

	fprintf(file, " %s %s (%d%%)\n", renamecopy, names, similarity_index(p));
	free(names);
	show_mode_change(file, p, 0);
}

Project: git
File: revision.c

static void file_change(struct diff_options *options,
		 unsigned old_mode, unsigned new_mode,
		 const unsigned char *old_sha1,
		 const unsigned char *new_sha1,
		 const char *fullpath)
{
	tree_difference = REV_TREE_DIFFERENT;
	DIFF_OPT_SET(options, HAS_CHANGES);
}

Project: git
File: revision.c

static void prepare_show_merge(struct rev_info *revs)
{
	struct commit_list *bases;
	struct commit *head, *other;
	unsigned char sha1[20];
	const char **prune = NULL;
	int i, prune_num = 1; /* counting terminating NULL */

	if (get_sha1("HEAD", sha1) || !(head = lookup_commit(sha1)))
		die("--merge without HEAD?");
	if (get_sha1("MERGE_HEAD", sha1) || !(other = lookup_commit(sha1)))
		die("--merge without MERGE_HEAD?");
	add_pending_object(revs, &head->object, "HEAD");
	add_pending_object(revs, &other->object, "MERGE_HEAD");
	bases = get_merge_bases(head, other, 1);
	add_pending_commit_list(revs, bases, UNINTERESTING);
	free_commit_list(bases);
	head->object.flags |= SYMMETRIC_LEFT;

	if (!active_nr)
		read_cache();
	for (i = 0; i < active_nr; i++) {
		struct cache_entry *ce = active_cache[i];
		if (!ce_stage(ce))
			continue;
		if (ce_path_match(ce, revs->prune_data)) {
			prune_num++;
			prune = xrealloc(prune, sizeof(*prune) * prune_num);
			prune[prune_num-2] = ce->name;
			prune[prune_num-1] = NULL;
		}
		while ((i+1 < active_nr) &&
		       ce_same_name(ce, active_cache[i+1]))
			i++;
	}
	revs->prune_data = prune;
	revs->limited = 1;
}

Project: git
File: revision.c

struct commit *get_revision(struct rev_info *revs)
{
	struct commit *c = get_revision_internal(revs);
	if (c && revs->graph)
		graph_update(revs->graph, c);
	return c;
}

Project: git
File: diff.c

static const char *diff_funcname_pattern(struct diff_filespec *one)
{
	const char *ident, *pattern;
	int i;

	diff_filespec_check_attr(one);
	ident = one->funcname_pattern_ident;

	if (!ident)
		/*
		 * If the config file has "funcname.default" defined, that
		 * regexp is used; otherwise NULL is returned and xemit uses
		 * the built-in default.
		 */
		return funcname_pattern("default");

	/* Look up custom "funcname.$ident" regexp from config. */
	pattern = funcname_pattern(ident);
	if (pattern)
		return pattern;

	/*
	 * And define built-in fallback patterns here.  Note that
	 * these can be overridden by the user's config settings.
	 */
	for (i = 0; i < ARRAY_SIZE(builtin_funcname_pattern); i++)
		if (!strcmp(ident, builtin_funcname_pattern[i].name))
			return builtin_funcname_pattern[i].pattern;

	return NULL;
}

Project: git
File: tree-diff.c

static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2, const char *base, int baselen, struct diff_options *opt)
{
	unsigned mode1, mode2;
	const char *path1, *path2;
	const unsigned char *sha1, *sha2;
	int cmp, pathlen1, pathlen2;
	char *fullname;

	sha1 = tree_entry_extract(t1, &path1, &mode1);
	sha2 = tree_entry_extract(t2, &path2, &mode2);

	pathlen1 = tree_entry_len(path1, sha1);
	pathlen2 = tree_entry_len(path2, sha2);
	cmp = base_name_compare(path1, pathlen1, mode1, path2, pathlen2, mode2);
	if (cmp < 0) {
		show_entry(opt, "-", t1, base, baselen);
		return -1;
	}
	if (cmp > 0) {
		show_entry(opt, "+", t2, base, baselen);
		return 1;
	}
	if (!DIFF_OPT_TST(opt, FIND_COPIES_HARDER) && !hashcmp(sha1, sha2) && mode1 == mode2)
		return 0;

	/*
	 * If the filemode has changed to/from a directory from/to a regular
	 * file, we need to consider it a remove and an add.
	 */
	if (S_ISDIR(mode1) != S_ISDIR(mode2)) {
		show_entry(opt, "-", t1, base, baselen);
		show_entry(opt, "+", t2, base, baselen);
		return 0;
	}

	if (DIFF_OPT_TST(opt, RECURSIVE) && S_ISDIR(mode1)) {
		int retval;
		char *newbase = malloc_base(base, baselen, path1, pathlen1);
		if (DIFF_OPT_TST(opt, TREE_IN_RECURSIVE)) {
			newbase[baselen + pathlen1] = 0;
			opt->change(opt, mode1, mode2,
				    sha1, sha2, newbase);
			newbase[baselen + pathlen1] = '/';
		}
		retval = diff_tree_sha1(sha1, sha2, newbase, opt);
		free(newbase);
		return retval;
	}

	fullname = malloc_fullname(base, baselen, path1, pathlen1);
	opt->change(opt, mode1, mode2, sha1, sha2, fullname);
	free(fullname);
	return 0;
}

Project: git
File: diff.c

void diff_free_filespec_blob(struct diff_filespec *s)
{
	if (s->should_free)
		free(s->data);
	else if (s->should_munmap)
		munmap(s->data, s->size);

	if (s->should_free || s->should_munmap) {
		s->should_free = s->should_munmap = 0;
		s->data = NULL;
	}
}

Project: git
File: diff.c

static void strip_prefix(int prefix_length, const char **namep, const char **otherp)
{
	/* Strip the prefix but do not molest /dev/null and absolute paths */
	if (*namep && **namep != '/')
		*namep += prefix_length;
	if (*otherp && **otherp != '/')
		*otherp += prefix_length;
}

Project: git
File: diff.c

int diff_flush_patch_id(struct diff_options *options, unsigned char *sha1)
{
	struct diff_queue_struct *q = &diff_queued_diff;
	int i;
	int result = diff_get_patch_id(options, sha1);

	for (i = 0; i < q->nr; i++)
		diff_free_filepair(q->queue[i]);

	free(q->queue);
	q->queue = NULL;
	q->nr = q->alloc = 0;

	return result;
}

Project: git
File: revision.c

int prepare_revision_walk(struct rev_info *revs)
{
	int nr = revs->pending.nr;
	struct object_array_entry *e, *list;

	e = list = revs->pending.objects;
	revs->pending.nr = 0;
	revs->pending.alloc = 0;
	revs->pending.objects = NULL;
	while (--nr >= 0) {
		struct commit *commit = handle_commit(revs, e->item, e->name);
		if (commit) {
			if (!(commit->object.flags & SEEN)) {
				commit->object.flags |= SEEN;
				insert_by_date(commit, &revs->commits);
			}
		}
		e++;
	}
	free(list);

	if (revs->no_walk)
		return 0;
	if (revs->limited)
		if (limit_list(revs) < 0)
			return -1;
	if (revs->topo_order)
		sort_in_topological_order(&revs->commits, revs->lifo);
	return 0;
}

Project: git
File: diff.c

static int similarity_index(struct diff_filepair *p)
{
	return p->score * 100 / MAX_SCORE;
}

Project: git
File: diff.c

int diff_setup_done(struct diff_options *options)
{
	int count = 0;

	if (options->output_format & DIFF_FORMAT_NAME)
		count++;
	if (options->output_format & DIFF_FORMAT_NAME_STATUS)
		count++;
	if (options->output_format & DIFF_FORMAT_CHECKDIFF)
		count++;
	if (options->output_format & DIFF_FORMAT_NO_OUTPUT)
		count++;
	if (count > 1)
		die("--name-only, --name-status, --check and -s are mutually exclusive");

	if (DIFF_OPT_TST(options, FIND_COPIES_HARDER))
		options->detect_rename = DIFF_DETECT_COPY;

	if (!DIFF_OPT_TST(options, RELATIVE_NAME))
		options->prefix = NULL;
	if (options->prefix)
		options->prefix_length = strlen(options->prefix);
	else
		options->prefix_length = 0;

	if (options->output_format & (DIFF_FORMAT_NAME |
				      DIFF_FORMAT_NAME_STATUS |
				      DIFF_FORMAT_CHECKDIFF |
				      DIFF_FORMAT_NO_OUTPUT))
		options->output_format &= ~(DIFF_FORMAT_RAW |
					    DIFF_FORMAT_NUMSTAT |
					    DIFF_FORMAT_DIFFSTAT |
					    DIFF_FORMAT_SHORTSTAT |
					    DIFF_FORMAT_DIRSTAT |
					    DIFF_FORMAT_SUMMARY |
					    DIFF_FORMAT_PATCH);

	/*
	 * These cases always need recursive; we do not drop caller-supplied
	 * recursive bits for other formats here.
	 */
	if (options->output_format & (DIFF_FORMAT_PATCH |
				      DIFF_FORMAT_NUMSTAT |
				      DIFF_FORMAT_DIFFSTAT |
				      DIFF_FORMAT_SHORTSTAT |
				      DIFF_FORMAT_DIRSTAT |
				      DIFF_FORMAT_SUMMARY |
				      DIFF_FORMAT_CHECKDIFF))
		DIFF_OPT_SET(options, RECURSIVE);
	/*
	 * Also pickaxe would not work very well if you do not say recursive
	 */
	if (options->pickaxe)
		DIFF_OPT_SET(options, RECURSIVE);

	if (options->detect_rename && options->rename_limit < 0)
		options->rename_limit = diff_rename_limit_default;
	if (options->setup & DIFF_SETUP_USE_CACHE) {
		if (!active_cache)
			/* read-cache does not die even when it fails
			 * so it is safe for us to do this here.  Also
			 * it does not smudge active_cache or active_nr
			 * when it fails, so we do not have to worry about
			 * cleaning it up ourselves either.
			 */
			read_cache();
	}
	if (options->abbrev <= 0 || 40 < options->abbrev)
		options->abbrev = 40; /* full */

	/*
	 * It does not make sense to show the first hit we happened
	 * to have found.  It does not make sense not to return with
	 * exit code in such a case either.
	 */
	if (DIFF_OPT_TST(options, QUIET)) {
		options->output_format = DIFF_FORMAT_NO_OUTPUT;
		DIFF_OPT_SET(options, EXIT_WITH_STATUS);
	}

	/*
	 * If we postprocess in diffcore, we cannot simply return
	 * upon the first hit.  We need to run diff as usual.
	 */
	if (options->pickaxe || options->filter)
		DIFF_OPT_CLR(options, QUIET);

	return 0;
}

Project: git
File: diff.c

static int diff_filespec_is_identical(struct diff_filespec *one,
				      struct diff_filespec *two)
{
	if (S_ISGITLINK(one->mode))
		return 0;
	if (diff_populate_filespec(one, 0))
		return 0;
	if (diff_populate_filespec(two, 0))
		return 0;
	return !memcmp(one->data, two->data, one->size);
}

Project: git
File: revision.c

void add_head_to_pending(struct rev_info *revs)
{
	unsigned char sha1[20];
	struct object *obj;
	if (get_sha1("HEAD", sha1))
		return;
	obj = parse_object(sha1);
	if (!obj)
		return;
	add_pending_object(revs, obj, "HEAD");
}

Project: git
File: diff.c

struct diff_filepair *diff_queue(struct diff_queue_struct *queue,
				 struct diff_filespec *one,
				 struct diff_filespec *two)
{
	struct diff_filepair *dp = xcalloc(1, sizeof(*dp));
	dp->one = one;
	dp->two = two;
	if (queue)
		diff_q(queue, dp);
	return dp;
}

Project: git
File: revision.c

static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
{
	struct commit_list **pp, *parent;
	int tree_changed = 0, tree_same = 0;

	/*
	 * If we don't do pruning, everything is interesting
	 */
	if (!revs->prune)
		return;

	if (!commit->tree)
		return;

	if (!commit->parents) {
		if (rev_same_tree_as_empty(revs, commit->tree))
			commit->object.flags |= TREESAME;
		return;
	}

	/*
	 * Normal non-merge commit? If we don't want to make the
	 * history dense, we consider it always to be a change..
	 */
	if (!revs->dense && !commit->parents->next)
		return;

	pp = &commit->parents;
	while ((parent = *pp) != NULL) {
		struct commit *p = parent->item;

		if (parse_commit(p) < 0)
			die("cannot simplify commit %s (because of %s)",
			    sha1_to_hex(commit->object.sha1),
			    sha1_to_hex(p->object.sha1));
		switch (rev_compare_tree(revs, p->tree, commit->tree)) {
		case REV_TREE_SAME:
			tree_same = 1;
			if (!revs->simplify_history || (p->object.flags & UNINTERESTING)) {
				/* Even if a merge with an uninteresting
				 * side branch brought the entire change
				 * we are interested in, we do not want
				 * to lose the other branches of this
				 * merge, so we just keep going.
				 */
				pp = &parent->next;
				continue;
			}
			parent->next = NULL;
			commit->parents = parent;
			commit->object.flags |= TREESAME;
			return;

		case REV_TREE_NEW:
			if (revs->remove_empty_trees &&
			    rev_same_tree_as_empty(revs, p->tree)) {
				/* We are adding all the specified
				 * paths from this parent, so the
				 * history beyond this parent is not
				 * interesting.  Remove its parents
				 * (they are grandparents for us).
				 * IOW, we pretend this parent is a
				 * "root" commit.
				 */
				if (parse_commit(p) < 0)
					die("cannot simplify commit %s (invalid %s)",
					    sha1_to_hex(commit->object.sha1),
					    sha1_to_hex(p->object.sha1));
				p->parents = NULL;
			}
		/* fallthrough */
		case REV_TREE_DIFFERENT:
			tree_changed = 1;
			pp = &parent->next;
			continue;
		}
		die("bad tree compare for commit %s", sha1_to_hex(commit->object.sha1));
	}
	if (tree_changed && !tree_same)
		return;
	commit->object.flags |= TREESAME;
}

Project: git
File: diff-lib.c

static inline void skip_same_name(struct cache_entry *ce, struct unpack_trees_options *o)
{
	int len = ce_namelen(ce);
	const struct index_state *index = o->src_index;

	while (o->pos < index->cache_nr) {
		struct cache_entry *next = index->cache[o->pos];
		if (len != ce_namelen(next))
			break;
		if (memcmp(ce->name, next->name, len))
			break;
		o->pos++;
	}
}

Project: git
File: diff.c

static const char *external_diff(void)
{
	static const char *external_diff_cmd = NULL;
	static int done_preparing = 0;

	if (done_preparing)
		return external_diff_cmd;
	external_diff_cmd = getenv("GIT_EXTERNAL_DIFF");
	if (!external_diff_cmd)
		external_diff_cmd = external_diff_cmd_cfg;
	done_preparing = 1;
	return external_diff_cmd;
}

Project: git
File: diff.c

static void diffstat_consume(void *priv, char *line, unsigned long len)
{
	struct diffstat_t *diffstat = priv;
	struct diffstat_file *x = diffstat->files[diffstat->nr - 1];

	if (line[0] == '+')
		x->added++;
	else if (line[0] == '-')
		x->deleted++;
}

Project: git
File: diff.c

void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1,
		   unsigned short mode)
{
	if (mode) {
		spec->mode = canon_mode(mode);
		hashcpy(spec->sha1, sha1);
		spec->sha1_valid = !is_null_sha1(sha1);
	}
}

Project: git
File: diff.c

static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1)
{
	struct diff_queue_struct *q = &diff_queued_diff;
	int i;
	SHA_CTX ctx;
	struct patch_id_t data;
	char buffer[PATH_MAX * 4 + 20];

	SHA1_Init(&ctx);
	memset(&data, 0, sizeof(struct patch_id_t));
	data.ctx = &ctx;
	data.xm.consume = patch_id_consume;

	for (i = 0; i < q->nr; i++) {
		xpparam_t xpp;
		xdemitconf_t xecfg;
		xdemitcb_t ecb;
		mmfile_t mf1, mf2;
		struct diff_filepair *p = q->queue[i];
		int len1, len2;

		memset(&xecfg, 0, sizeof(xecfg));
		if (p->status == 0)
			return error("internal diff status error");
		if (p->status == DIFF_STATUS_UNKNOWN)
			continue;
		if (diff_unmodified_pair(p))
			continue;
		if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) ||
		    (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode)))
			continue;
		if (DIFF_PAIR_UNMERGED(p))
			continue;

		diff_fill_sha1_info(p->one);
		diff_fill_sha1_info(p->two);
		if (fill_mmfile(&mf1, p->one) < 0 ||
				fill_mmfile(&mf2, p->two) < 0)
			return error("unable to read files to diff");

		len1 = remove_space(p->one->path, strlen(p->one->path));
		len2 = remove_space(p->two->path, strlen(p->two->path));
		if (p->one->mode == 0)
			len1 = snprintf(buffer, sizeof(buffer),
					"diff--gita/%.*sb/%.*s"
					"newfilemode%06o"
					"---/dev/null"
					"+++b/%.*s",
					len1, p->one->path,
					len2, p->two->path,
					p->two->mode,
					len2, p->two->path);
		else if (p->two->mode == 0)
			len1 = snprintf(buffer, sizeof(buffer),
					"diff--gita/%.*sb/%.*s"
					"deletedfilemode%06o"
					"---a/%.*s"
					"+++/dev/null",
					len1, p->one->path,
					len2, p->two->path,
					p->one->mode,
					len1, p->one->path);
		else
			len1 = snprintf(buffer, sizeof(buffer),
					"diff--gita/%.*sb/%.*s"
					"---a/%.*s"
					"+++b/%.*s",
					len1, p->one->path,
					len2, p->two->path,
					len1, p->one->path,
					len2, p->two->path);
		SHA1_Update(&ctx, buffer, len1);

		xpp.flags = XDF_NEED_MINIMAL;
		xecfg.ctxlen = 3;
		xecfg.flags = XDL_EMIT_FUNCNAMES;
		ecb.outf = xdiff_outf;
		ecb.priv = &data;
		xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
	}

	SHA1_Final(sha1, &ctx);
	return 0;
}

Project: git
File: diff.c

static void diffcore_skip_stat_unmatch(struct diff_options *diffopt)
{
	int i;
	struct diff_queue_struct *q = &diff_queued_diff;
	struct diff_queue_struct outq;
	outq.queue = NULL;
	outq.nr = outq.alloc = 0;

	for (i = 0; i < q->nr; i++) {
		struct diff_filepair *p = q->queue[i];

		/*
		 * 1. Entries that come from stat info dirtyness
		 *    always have both sides (iow, not create/delete),
		 *    one side of the object name is unknown, with
		 *    the same mode and size.  Keep the ones that
		 *    do not match these criteria.  They have real
		 *    differences.
		 *
		 * 2. At this point, the file is known to be modified,
		 *    with the same mode and size, and the object
		 *    name of one side is unknown.  Need to inspect
		 *    the identical contents.
		 */
		if (!DIFF_FILE_VALID(p->one) || /* (1) */
		    !DIFF_FILE_VALID(p->two) ||
		    (p->one->sha1_valid && p->two->sha1_valid) ||
		    (p->one->mode != p->two->mode) ||
		    diff_populate_filespec(p->one, 1) ||
		    diff_populate_filespec(p->two, 1) ||
		    (p->one->size != p->two->size) ||
		    !diff_filespec_is_identical(p->one, p->two)) /* (2) */
			diff_q(&outq, p);
		else {
			/*
			 * The caller can subtract 1 from skip_stat_unmatch
			 * to determine how many paths were dirty only
			 * due to stat info mismatch.
			 */
			if (!DIFF_OPT_TST(diffopt, NO_INDEX))
				diffopt->skip_stat_unmatch++;
			diff_free_filepair(p);
		}
	}
	free(q->queue);
	*q = outq;
}

Project: git
File: diff.c

static void diff_resolve_rename_copy(void)
{
	int i;
	struct diff_filepair *p;
	struct diff_queue_struct *q = &diff_queued_diff;

	diff_debug_queue("resolve-rename-copy", q);

	for (i = 0; i < q->nr; i++) {
		p = q->queue[i];
		p->status = 0; /* undecided */
		if (DIFF_PAIR_UNMERGED(p))
			p->status = DIFF_STATUS_UNMERGED;
		else if (!DIFF_FILE_VALID(p->one))
			p->status = DIFF_STATUS_ADDED;
		else if (!DIFF_FILE_VALID(p->two))
			p->status = DIFF_STATUS_DELETED;
		else if (DIFF_PAIR_TYPE_CHANGED(p))
			p->status = DIFF_STATUS_TYPE_CHANGED;

		/* from this point on, we are dealing with a pair
		 * whose both sides are valid and of the same type, i.e.
		 * either in-place edit or rename/copy edit.
		 */
		else if (DIFF_PAIR_RENAME(p)) {
			/*
			 * A rename might have re-connected a broken
			 * pair up, causing the pathnames to be the
			 * same again. If so, that's not a rename at
			 * all, just a modification..
			 *
			 * Otherwise, see if this source was used for
			 * multiple renames, in which case we decrement
			 * the count, and call it a copy.
			 */
			if (!strcmp(p->one->path, p->two->path))
				p->status = DIFF_STATUS_MODIFIED;
			else if (--p->one->rename_used > 0)
				p->status = DIFF_STATUS_COPIED;
			else
				p->status = DIFF_STATUS_RENAMED;
		}
		else if (hashcmp(p->one->sha1, p->two->sha1) ||
			 p->one->mode != p->two->mode ||
			 is_null_sha1(p->one->sha1))
			p->status = DIFF_STATUS_MODIFIED;
		else {
			/* This is a "no-change" entry and should not
			 * happen anymore, but prepare for broken callers.
			 */
			error("feeding unmodified %s to diffcore",
			      p->one->path);
			p->status = DIFF_STATUS_UNKNOWN;
		}
	}
	diff_debug_queue("resolve-rename-copy done", q);
}

Project: git
File: revision.c

void mark_tree_uninteresting(struct tree *tree)
{
	struct tree_desc desc;
	struct name_entry entry;
	struct object *obj = &tree->object;

	if (!tree)
		return;
	if (obj->flags & UNINTERESTING)
		return;
	obj->flags |= UNINTERESTING;
	if (!has_sha1_file(obj->sha1))
		return;
	if (parse_tree(tree) < 0)
		die("bad tree %s", sha1_to_hex(obj->sha1));

	init_tree_desc(&desc, tree->buffer, tree->size);
	while (tree_entry(&desc, &entry)) {
		switch (object_type(entry.mode)) {
		case OBJ_TREE:
			mark_tree_uninteresting(lookup_tree(entry.sha1));
			break;
		case OBJ_BLOB:
			mark_blob_uninteresting(lookup_blob(entry.sha1));
			break;
		default:
			/* Subproject commit - not in this repository */
			break;
		}
	}

	/*
	 * We don't care about the tree any more
	 * after it has been marked uninteresting.
	 */
	free(tree->buffer);
	tree->buffer = NULL;
}

Project: git
File: diff.c

struct diff_filespec *alloc_filespec(const char *path)
{
	int namelen = strlen(path);
	struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1);

	memset(spec, 0, sizeof(*spec));
	spec->path = (char *)(spec + 1);
	memcpy(spec->path, path, namelen+1);
	spec->count = 1;
	return spec;
}

Project: git
File: diff.c

static void print_word(FILE *file, struct diff_words_buffer *buffer, int len, int color,
		int suppress_newline)
{
	const char *ptr;
	int eol = 0;

	if (len == 0)
		return;

	ptr  = buffer->text.ptr + buffer->current;
	buffer->current += len;

	if (ptr[len - 1] == '\n') {
		eol = 1;
		len--;
	}

	fputs(diff_get_color(1, color), file);
	fwrite(ptr, len, 1, file);
	fputs(diff_get_color(1, DIFF_RESET), file);

	if (eol) {
		if (suppress_newline)
			buffer->suppressed_newline = 1;
		else
			putc('\n', file);
	}
}

Project: git
File: revision.c

static void remove_duplicate_parents(struct commit *commit)
{
	struct commit_list **pp, *p;

	/* Examine existing parents while marking ones we have seen... */
	pp = &commit->parents;
	while ((p = *pp) != NULL) {
		struct commit *parent = p->item;
		if (parent->object.flags & TMP_MARK) {
			*pp = p->next;
			continue;
		}
		parent->object.flags |= TMP_MARK;
		pp = &p->next;
	}
	/* ... and clear the temporary mark */
	for (p = commit->parents; p; p = p->next)
		p->item->object.flags &= ~TMP_MARK;
}

Project: git
File: diff.c

static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val)
{
	char c, *eq;
	int len;

	if (*arg != '-')
		return 0;
	c = *++arg;
	if (!c)
		return 0;
	if (c == arg_short) {
		c = *++arg;
		if (!c)
			return 1;
		if (val && isdigit(c)) {
			char *end;
			int n = strtoul(arg, &end, 10);
			if (*end)
				return 0;
			*val = n;
			return 1;
		}
		return 0;
	}
	if (c != '-')
		return 0;
	arg++;
	eq = strchr(arg, '=');
	if (eq)
		len = eq - arg;
	else
		len = strlen(arg);
	if (!len || strncmp(arg, arg_long, len))
		return 0;
	if (eq) {
		int n;
		char *end;
		if (!isdigit(*++eq))
			return 0;
		n = strtoul(eq, &end, 10);
		if (*end)
			return 0;
		*val = n;
	}
	return 1;
}

Project: git
File: diff.c

void diff_free_filespec_data(struct diff_filespec *s)
{
	diff_free_filespec_blob(s);
	free(s->cnt_data);
	s->cnt_data = NULL;
}

Project: git
File: diff.c

static void remove_tempfile(void)
{
	int i;

	for (i = 0; i < 2; i++)
		if (diff_temp[i].name == diff_temp[i].tmp_path) {
			unlink(diff_temp[i].name);
			diff_temp[i].name = NULL;
		}
}

Project: git
File: diff.c

static void run_checkdiff(struct diff_filepair *p, struct diff_options *o)
{
	const char *name;
	const char *other;
	const char *attr_path;

	if (DIFF_PAIR_UNMERGED(p)) {
		/* unmerged */
		return;
	}

	name = p->one->path;
	other = (strcmp(name, p->two->path) ? p->two->path : NULL);
	attr_path = other ? other : name;

	if (o->prefix_length)
		strip_prefix(o->prefix_length, &name, &other);

	diff_fill_sha1_info(p->one);
	diff_fill_sha1_info(p->two);

	builtin_checkdiff(name, other, attr_path, p->one, p->two, o);
}

Project: git
File: diff.c

static void show_graph(FILE *file, char ch, int cnt, const char *set, const char *reset)
{
	if (cnt <= 0)
		return;
	fprintf(file, "%s", set);
	while (cnt--)
		putc(ch, file);
	fprintf(file, "%s", reset);
}

Project: git
File: diff.c

static void show_shortstats(struct diffstat_t* data, struct diff_options *options)
{
	int i, adds = 0, dels = 0, total_files = data->nr;

	if (data->nr == 0)
		return;

	for (i = 0; i < data->nr; i++) {
		if (!data->files[i]->is_binary &&
		    !data->files[i]->is_unmerged) {
			int added = data->files[i]->added;
			int deleted= data->files[i]->deleted;
			if (!data->files[i]->is_renamed &&
			    (added + deleted == 0)) {
				total_files--;
			} else {
				adds += added;
				dels += deleted;
			}
		}
	}
	fprintf(options->file, " %d files changed, %d insertions(+), %d deletions(-)\n",
	       total_files, adds, dels);
}

Project: git
File: diff.c

static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat,
					  const char *name_a,
					  const char *name_b)
{
	struct diffstat_file *x;
	x = xcalloc(sizeof (*x), 1);
	if (diffstat->nr == diffstat->alloc) {
		diffstat->alloc = alloc_nr(diffstat->alloc);
		diffstat->files = xrealloc(diffstat->files,
				diffstat->alloc * sizeof(x));
	}
	diffstat->files[diffstat->nr++] = x;
	if (name_b) {
		x->from_name = xstrdup(name_a);
		x->name = xstrdup(name_b);
		x->is_renamed = 1;
	}
	else {
		x->from_name = NULL;
		x->name = xstrdup(name_a);
	}
	return x;
}

Project: git
File: diff.c

static int remove_space(char *line, int len)
{
	int i;
	char *dst = line;
	unsigned char c;

	for (i = 0; i < len; i++)
		if (!isspace((c = line[i])))
			*dst++ = c;

	return dst - line;
}

Project: git
File: diff.c

static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, unsigned long len)
{
	const char *cp;
	unsigned long allot;
	size_t l = len;

	if (ecb->truncate)
		return ecb->truncate(line, len);
	cp = line;
	allot = l;
	while (0 < l) {
		(void) utf8_width(&cp, &l);
		if (!cp)
			break; /* truncated in the middle? */
	}
	return allot - l;
}

Project: git
File: diff-lib.c

int do_diff_cache(const unsigned char *tree_sha1, struct diff_options *opt)
{
	struct tree *tree;
	struct rev_info revs;
	int i;
	struct cache_entry **dst;
	struct cache_entry *last = NULL;
	struct unpack_trees_options opts;
	struct tree_desc t;
	struct oneway_unpack_data unpack_cb;

	/*
	 * This is used by git-blame to run diff-cache internally;
	 * it potentially needs to repeatedly run this, so we will
	 * start by removing the higher order entries the last round
	 * left behind.
	 */
	dst = active_cache;
	for (i = 0; i < active_nr; i++) {
		struct cache_entry *ce = active_cache[i];
		if (ce_stage(ce)) {
			if (last && !strcmp(ce->name, last->name))
				continue;
			cache_tree_invalidate_path(active_cache_tree,
						   ce->name);
			last = ce;
			ce->ce_flags |= CE_REMOVE;
		}
		*dst++ = ce;
	}
	active_nr = dst - active_cache;

	init_revisions(&revs, NULL);
	revs.prune_data = opt->paths;
	tree = parse_tree_indirect(tree_sha1);
	if (!tree)
		die("bad tree object %s", sha1_to_hex(tree_sha1));

	unpack_cb.revs = &revs;
	unpack_cb.symcache[0] = '\0';
	memset(&opts, 0, sizeof(opts));
	opts.head_idx = 1;
	opts.index_only = 1;
	opts.merge = 1;
	opts.fn = oneway_diff;
	opts.unpack_data = &unpack_cb;
	opts.src_index = &the_index;
	opts.dst_index = &the_index;

	init_tree_desc(&t, tree->buffer, tree->size);
	if (unpack_trees(1, &t, &opts))
		exit(128);
	return 0;
}

Project: git
File: diff.c

static const char *funcname_pattern(const char *ident)
{
	struct funcname_pattern *pp;

	for (pp = funcname_pattern_list; pp; pp = pp->next)
		if (!strcmp(ident, pp->name))
			return pp->pattern;
	return NULL;
}

Project: git
File: diff.c

void diff_free_filepair(struct diff_filepair *p)
{
	free_filespec(p->one);
	free_filespec(p->two);
	free(p);
}

Project: git
File: diff.c

static void run_diffstat(struct diff_filepair *p, struct diff_options *o,
			 struct diffstat_t *diffstat)
{
	const char *name;
	const char *other;
	int complete_rewrite = 0;

	if (DIFF_PAIR_UNMERGED(p)) {
		/* unmerged */
		builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat, o, 0);
		return;
	}

	name = p->one->path;
	other = (strcmp(name, p->two->path) ? p->two->path : NULL);

	if (o->prefix_length)
		strip_prefix(o->prefix_length, &name, &other);

	diff_fill_sha1_info(p->one);
	diff_fill_sha1_info(p->two);

	if (p->status == DIFF_STATUS_MODIFIED && p->score)
		complete_rewrite = 1;
	builtin_diffstat(name, other, p->one, p->two, diffstat, o, complete_rewrite);
}

Project: git
File: diff-lib.c

int run_diff_index(struct rev_info *revs, int cached)
{
	struct object *ent;
	struct tree *tree;
	const char *tree_name;
	struct unpack_trees_options opts;
	struct tree_desc t;
	struct oneway_unpack_data unpack_cb;

	mark_merge_entries();

	ent = revs->pending.objects[0].item;
	tree_name = revs->pending.objects[0].name;
	tree = parse_tree_indirect(ent->sha1);
	if (!tree)
		return error("bad tree object %s", tree_name);

	unpack_cb.revs = revs;
	unpack_cb.symcache[0] = '\0';
	memset(&opts, 0, sizeof(opts));
	opts.head_idx = 1;
	opts.index_only = cached;
	opts.merge = 1;
	opts.fn = oneway_diff;
	opts.unpack_data = &unpack_cb;
	opts.src_index = &the_index;
	opts.dst_index = NULL;

	init_tree_desc(&t, tree->buffer, tree->size);
	if (unpack_trees(1, &t, &opts))
		exit(128);

	diffcore_std(&revs->diffopt);
	diff_flush(&revs->diffopt);
	return 0;
}

Project: git
File: diff.c

static void builtin_diffstat(const char *name_a, const char *name_b,
			     struct diff_filespec *one,
			     struct diff_filespec *two,
			     struct diffstat_t *diffstat,
			     struct diff_options *o,
			     int complete_rewrite)
{
	mmfile_t mf1, mf2;
	struct diffstat_file *data;

	data = diffstat_add(diffstat, name_a, name_b);

	if (!one || !two) {
		data->is_unmerged = 1;
		return;
	}
	if (complete_rewrite) {
		diff_populate_filespec(one, 0);
		diff_populate_filespec(two, 0);
		data->deleted = count_lines(one->data, one->size);
		data->added = count_lines(two->data, two->size);
		goto free_and_return;
	}
	if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
		die("unable to read files to diff");

	if (diff_filespec_is_binary(one) || diff_filespec_is_binary(two)) {
		data->is_binary = 1;
		data->added = mf2.size;
		data->deleted = mf1.size;
	} else {
		/* Crazy xdl interfaces.. */
		xpparam_t xpp;
		xdemitconf_t xecfg;
		xdemitcb_t ecb;

		memset(&xecfg, 0, sizeof(xecfg));
		xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts;
		ecb.outf = xdiff_outf;
		ecb.priv = diffstat;
		xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
	}

 free_and_return:
	diff_free_filespec_data(one);
	diff_free_filespec_data(two);
}

Project: git
File: revision.c

enum commit_action simplify_commit(struct rev_info *revs, struct commit *commit)
{
	if (commit->object.flags & SHOWN)
		return commit_ignore;
	if (revs->unpacked && has_sha1_pack(commit->object.sha1, revs->ignore_packed))
		return commit_ignore;
	if (revs->show_all)
		return commit_show;
	if (commit->object.flags & UNINTERESTING)
		return commit_ignore;
	if (revs->min_age != -1 && (commit->date > revs->min_age))
		return commit_ignore;
	if (revs->no_merges && commit->parents && commit->parents->next)
		return commit_ignore;
	if (!commit_match(commit, revs))
		return commit_ignore;
	if (revs->prune && revs->dense) {
		/* Commit without changes? */
		if (commit->object.flags & TREESAME) {
			/* drop merges unless we want parenthood */
			if (!revs->rewrite_parents)
				return commit_ignore;
			/* non-merge - always ignore it */
			if (!commit->parents || !commit->parents->next)
				return commit_ignore;
		}
		if (revs->rewrite_parents && rewrite_parents(revs, commit) < 0)
			return commit_error;
	}
	return commit_show;
}

Project: git
File: revision.c

static char *path_name(struct name_path *path, const char *name)
{
	struct name_path *p;
	char *n, *m;
	int nlen = strlen(name);
	int len = nlen + 1;

	for (p = path; p; p = p->up) {
		if (p->elem_len)
			len += p->elem_len + 1;
	}
	n = xmalloc(len);
	m = n + len - (nlen + 1);
	strcpy(m, name);
	for (p = path; p; p = p->up) {
		if (p->elem_len) {
			m -= p->elem_len + 1;
			memcpy(m, p->elem, p->elem_len);
			m[p->elem_len] = '/';
		}
	}
	return n;
}

Project: git
File: diff.c

static int parse_diff_color_slot(const char *var, int ofs)
{
	if (!strcasecmp(var+ofs, "plain"))
		return DIFF_PLAIN;
	if (!strcasecmp(var+ofs, "meta"))
		return DIFF_METAINFO;
	if (!strcasecmp(var+ofs, "frag"))
		return DIFF_FRAGINFO;
	if (!strcasecmp(var+ofs, "old"))
		return DIFF_FILE_OLD;
	if (!strcasecmp(var+ofs, "new"))
		return DIFF_FILE_NEW;
	if (!strcasecmp(var+ofs, "commit"))
		return DIFF_COMMIT;
	if (!strcasecmp(var+ofs, "whitespace"))
		return DIFF_WHITESPACE;
	die("bad config variable '%s'", var);
}

Project: git
File: diff-lib.c

static int check_removed(const struct cache_entry *ce, struct stat *st)
{
	if (lstat(ce->name, st) < 0) {
		if (errno != ENOENT && errno != ENOTDIR)
			return -1;
		return 1;
	}
	if (has_symlink_leading_path(ce_namelen(ce), ce->name))
		return 1;
	if (S_ISDIR(st->st_mode)) {
		unsigned char sub[20];

		/*
		 * If ce is already a gitlink, we can have a plain
		 * directory (i.e. the submodule is not checked out),
		 * or a checked out submodule.  Either case this is not
		 * a case where something was removed from the work tree,
		 * so we will return 0.
		 *
		 * Otherwise, if the directory is not a submodule
		 * repository, that means ce which was a blob turned into
		 * a directory --- the blob was removed!
		 */
		if (!S_ISGITLINK(ce->ce_mode) &&
		    resolve_gitlink_ref(ce->name, "HEAD", sub))
			return 1;
	}
	return 0;
}

Project: git
File: tree-diff.c

int diff_tree(struct tree_desc *t1, struct tree_desc *t2, const char *base, struct diff_options *opt)
{
	int baselen = strlen(base);

	for (;;) {
		if (DIFF_OPT_TST(opt, QUIET) && DIFF_OPT_TST(opt, HAS_CHANGES))
			break;
		if (opt->nr_paths) {
			skip_uninteresting(t1, base, baselen, opt);
			skip_uninteresting(t2, base, baselen, opt);
		}
		if (!t1->size) {
			if (!t2->size)
				break;
			show_entry(opt, "+", t2, base, baselen);
			update_tree_entry(t2);
			continue;
		}
		if (!t2->size) {
			show_entry(opt, "-", t1, base, baselen);
			update_tree_entry(t1);
			continue;
		}
		switch (compare_tree_entry(t1, t2, base, baselen, opt)) {
		case -1:
			update_tree_entry(t1);
			continue;
		case 0:
			update_tree_entry(t1);
			/* Fallthrough */
		case 1:
			update_tree_entry(t2);
			continue;
		}
		die("git-diff-tree: internal error");
	}
	return 0;
}

Project: git
File: revision.c

static int handle_one_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
		const char *email, unsigned long timestamp, int tz,
		const char *message, void *cb_data)
{
	handle_one_reflog_commit(osha1, cb_data);
	handle_one_reflog_commit(nsha1, cb_data);
	return 0;
}

Project: git
File: tree-diff.c

static void try_to_follow_renames(struct tree_desc *t1, struct tree_desc *t2, const char *base, struct diff_options *opt)
{
	struct diff_options diff_opts;
	struct diff_queue_struct *q = &diff_queued_diff;
	struct diff_filepair *choice;
	const char *paths[1];
	int i;

	/* Remove the file creation entry from the diff queue, and remember it */
	choice = q->queue[0];
	q->nr = 0;

	diff_setup(&diff_opts);
	DIFF_OPT_SET(&diff_opts, RECURSIVE);
	diff_opts.detect_rename = DIFF_DETECT_RENAME;
	diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT;
	diff_opts.single_follow = opt->paths[0];
	diff_opts.break_opt = opt->break_opt;
	paths[0] = NULL;
	diff_tree_setup_paths(paths, &diff_opts);
	if (diff_setup_done(&diff_opts) < 0)
		die("unable to set up diff options to follow renames");
	diff_tree(t1, t2, base, &diff_opts);
	diffcore_std(&diff_opts);
	diff_tree_release_paths(&diff_opts);

	/* Go through the new set of filepairing, and see if we find a more interesting one */
	for (i = 0; i < q->nr; i++) {
		struct diff_filepair *p = q->queue[i];

		/*
		 * Found a source? Not only do we use that for the new
		 * diff_queued_diff, we will also use that as the path in
		 * the future!
		 */
		if ((p->status == 'R' || p->status == 'C') && !strcmp(p->two->path, opt->paths[0])) {
			/* Switch the file-pairs around */
			q->queue[i] = choice;
			choice = p;

			/* Update the path we use from now on.. */
			diff_tree_release_paths(opt);
			opt->paths[0] = xstrdup(p->one->path);
			diff_tree_setup_paths(opt->paths, opt);
			break;
		}
	}

	/*
	 * Then, discard all the non-relevane file pairs...
	 */
	for (i = 0; i < q->nr; i++) {
		struct diff_filepair *p = q->queue[i];
		diff_free_filepair(p);
	}

	/*
	 * .. and re-instate the one we want (which might be either the
	 * original one, or the rename/copy we found)
	 */
	q->queue[0] = choice;
	q->nr = 1;
}

Project: git
File: revision.c

static void handle_refs(struct rev_info *revs, unsigned flags,
		int (*for_each)(each_ref_fn, void *))
{
	struct all_refs_cb cb;
	cb.all_revs = revs;
	cb.all_flags = flags;
	for_each(handle_one_ref, &cb);
}

Project: git
File: revision.c

int setup_revisions(int argc, const char **argv, struct rev_info *revs, const char *def)
{
	int i, flags, seen_dashdash, show_merge;
	const char **unrecognized = argv + 1;
	int left = 1;
	int all_match = 0;
	int regflags = 0;
	int fixed = 0;

	/* First, search for "--" */
	seen_dashdash = 0;
	for (i = 1; i < argc; i++) {
		const char *arg = argv[i];
		if (strcmp(arg, "--"))
			continue;
		argv[i] = NULL;
		argc = i;
		if (argv[i + 1])
			revs->prune_data = get_pathspec(revs->prefix, argv + i + 1);
		seen_dashdash = 1;
		break;
	}

	flags = show_merge = 0;
	for (i = 1; i < argc; i++) {
		const char *arg = argv[i];
		if (*arg == '-') {
			int opts;
			if (!prefixcmp(arg, "--max-count=")) {
				revs->max_count = atoi(arg + 12);
				continue;
			}
			if (!prefixcmp(arg, "--skip=")) {
				revs->skip_count = atoi(arg + 7);
				continue;
			}
			/* accept -<digit>, like traditional "head" */
			if ((*arg == '-') && isdigit(arg[1])) {
				revs->max_count = atoi(arg + 1);
				continue;
			}
			if (!strcmp(arg, "-n")) {
				if (argc <= i + 1)
					die("-n requires an argument");
				revs->max_count = atoi(argv[++i]);
				continue;
			}
			if (!prefixcmp(arg, "-n")) {
				revs->max_count = atoi(arg + 2);
				continue;
			}
			if (!prefixcmp(arg, "--max-age=")) {
				revs->max_age = atoi(arg + 10);
				continue;
			}
			if (!prefixcmp(arg, "--since=")) {
				revs->max_age = approxidate(arg + 8);
				continue;
			}
			if (!prefixcmp(arg, "--after=")) {
				revs->max_age = approxidate(arg + 8);
				continue;
			}
			if (!prefixcmp(arg, "--min-age=")) {
				revs->min_age = atoi(arg + 10);
				continue;
			}
			if (!prefixcmp(arg, "--before=")) {
				revs->min_age = approxidate(arg + 9);
				continue;
			}
			if (!prefixcmp(arg, "--until=")) {
				revs->min_age = approxidate(arg + 8);
				continue;
			}
			if (!strcmp(arg, "--all")) {
				handle_refs(revs, flags, for_each_ref);
				continue;
			}
			if (!strcmp(arg, "--branches")) {
				handle_refs(revs, flags, for_each_branch_ref);
				continue;
			}
			if (!strcmp(arg, "--tags")) {
				handle_refs(revs, flags, for_each_tag_ref);
				continue;
			}
			if (!strcmp(arg, "--remotes")) {
				handle_refs(revs, flags, for_each_remote_ref);
				continue;
			}
			if (!strcmp(arg, "--first-parent")) {
				revs->first_parent_only = 1;
				continue;
			}
			if (!strcmp(arg, "--reflog")) {
				handle_reflog(revs, flags);
				continue;
			}
			if (!strcmp(arg, "-g") ||
					!strcmp(arg, "--walk-reflogs")) {
				init_reflog_walk(&revs->reflog_info);
				continue;
			}
			if (!strcmp(arg, "--not")) {
				flags ^= UNINTERESTING;
				continue;
			}
			if (!strcmp(arg, "--default")) {
				if (++i >= argc)
					die("bad --default argument");
				def = argv[i];
				continue;
			}
			if (!strcmp(arg, "--merge")) {
				show_merge = 1;
				continue;
			}
			if (!strcmp(arg, "--topo-order")) {
				revs->lifo = 1;
				revs->topo_order = 1;
				continue;
			}
			if (!strcmp(arg, "--date-order")) {
				revs->lifo = 0;
				revs->topo_order = 1;
				continue;
			}
			if (!prefixcmp(arg, "--early-output")) {
				int count = 100;
				switch (arg[14]) {
				case '=':
					count = atoi(arg+15);
					/* Fallthrough */
				case 0:
					revs->topo_order = 1;
					revs->early_output = count;
					continue;
				}
			}
			if (!strcmp(arg, "--parents")) {
				revs->rewrite_parents = 1;
				revs->print_parents = 1;
				continue;
			}
			if (!strcmp(arg, "--dense")) {
				revs->dense = 1;
				continue;
			}
			if (!strcmp(arg, "--sparse")) {
				revs->dense = 0;
				continue;
			}
			if (!strcmp(arg, "--show-all")) {
				revs->show_all = 1;
				continue;
			}
			if (!strcmp(arg, "--remove-empty")) {
				revs->remove_empty_trees = 1;
				continue;
			}
			if (!strcmp(arg, "--no-merges")) {
				revs->no_merges = 1;
				continue;
			}
			if (!strcmp(arg, "--boundary")) {
				revs->boundary = 1;
				continue;
			}
			if (!strcmp(arg, "--left-right")) {
				revs->left_right = 1;
				continue;
			}
			if (!strcmp(arg, "--cherry-pick")) {
				revs->cherry_pick = 1;
				revs->limited = 1;
				continue;
			}
			if (!strcmp(arg, "--objects")) {
				revs->tag_objects = 1;
				revs->tree_objects = 1;
				revs->blob_objects = 1;
				continue;
			}
			if (!strcmp(arg, "--objects-edge")) {
				revs->tag_objects = 1;
				revs->tree_objects = 1;
				revs->blob_objects = 1;
				revs->edge_hint = 1;
				continue;
			}
			if (!strcmp(arg, "--unpacked")) {
				revs->unpacked = 1;
				free(revs->ignore_packed);
				revs->ignore_packed = NULL;
				revs->num_ignore_packed = 0;
				continue;
			}
			if (!prefixcmp(arg, "--unpacked=")) {
				revs->unpacked = 1;
				add_ignore_packed(revs, arg+11);
				continue;
			}
			if (!strcmp(arg, "-r")) {
				revs->diff = 1;
				DIFF_OPT_SET(&revs->diffopt, RECURSIVE);
				continue;
			}
			if (!strcmp(arg, "-t")) {
				revs->diff = 1;
				DIFF_OPT_SET(&revs->diffopt, RECURSIVE);
				DIFF_OPT_SET(&revs->diffopt, TREE_IN_RECURSIVE);
				continue;
			}
			if (!strcmp(arg, "-m")) {
				revs->ignore_merges = 0;
				continue;
			}
			if (!strcmp(arg, "-c")) {
				revs->diff = 1;
				revs->dense_combined_merges = 0;
				revs->combine_merges = 1;
				continue;
			}
			if (!strcmp(arg, "--cc")) {
				revs->diff = 1;
				revs->dense_combined_merges = 1;
				revs->combine_merges = 1;
				continue;
			}
			if (!strcmp(arg, "-v")) {
				revs->verbose_header = 1;
				continue;
			}
			if (!strcmp(arg, "--pretty")) {
				revs->verbose_header = 1;
				get_commit_format(arg+8, revs);
				continue;
			}
			if (!prefixcmp(arg, "--pretty=")) {
				revs->verbose_header = 1;
				get_commit_format(arg+9, revs);
				continue;
			}
			if (!strcmp(arg, "--graph")) {
				revs->topo_order = 1;
				revs->rewrite_parents = 1;
				revs->graph = graph_init(revs);
				continue;
			}
			if (!strcmp(arg, "--root")) {
				revs->show_root_diff = 1;
				continue;
			}
			if (!strcmp(arg, "--no-commit-id")) {
				revs->no_commit_id = 1;
				continue;
			}
			if (!strcmp(arg, "--always")) {
				revs->always_show_header = 1;
				continue;
			}
			if (!strcmp(arg, "--no-abbrev")) {
				revs->abbrev = 0;
				continue;
			}
			if (!strcmp(arg, "--abbrev")) {
				revs->abbrev = DEFAULT_ABBREV;
				continue;
			}
			if (!prefixcmp(arg, "--abbrev=")) {
				revs->abbrev = strtoul(arg + 9, NULL, 10);
				if (revs->abbrev < MINIMUM_ABBREV)
					revs->abbrev = MINIMUM_ABBREV;
				else if (revs->abbrev > 40)
					revs->abbrev = 40;
				continue;
			}
			if (!strcmp(arg, "--abbrev-commit")) {
				revs->abbrev_commit = 1;
				continue;
			}
			if (!strcmp(arg, "--full-diff")) {
				revs->diff = 1;
				revs->full_diff = 1;
				continue;
			}
			if (!strcmp(arg, "--full-history")) {
				revs->simplify_history = 0;
				continue;
			}
			if (!strcmp(arg, "--relative-date")) {
				revs->date_mode = DATE_RELATIVE;
				continue;
			}
			if (!strncmp(arg, "--date=", 7)) {
				revs->date_mode = parse_date_format(arg + 7);
				continue;
			}
			if (!strcmp(arg, "--log-size")) {
				revs->show_log_size = 1;
				continue;
			}

			/*
			 * Grepping the commit log
			 */
			if (!prefixcmp(arg, "--author=")) {
				add_header_grep(revs, "author", arg+9);
				continue;
			}
			if (!prefixcmp(arg, "--committer=")) {
				add_header_grep(revs, "committer", arg+12);
				continue;
			}
			if (!prefixcmp(arg, "--grep=")) {
				add_message_grep(revs, arg+7);
				continue;
			}
			if (!strcmp(arg, "--extended-regexp") ||
			    !strcmp(arg, "-E")) {
				regflags |= REG_EXTENDED;
				continue;
			}
			if (!strcmp(arg, "--regexp-ignore-case") ||
			    !strcmp(arg, "-i")) {
				regflags |= REG_ICASE;
				continue;
			}
			if (!strcmp(arg, "--fixed-strings") ||
			    !strcmp(arg, "-F")) {
				fixed = 1;
				continue;
			}
			if (!strcmp(arg, "--all-match")) {
				all_match = 1;
				continue;
			}
			if (!prefixcmp(arg, "--encoding=")) {
				arg += 11;
				if (strcmp(arg, "none"))
					git_log_output_encoding = xstrdup(arg);
				else
					git_log_output_encoding = "";
				continue;
			}
			if (!strcmp(arg, "--reverse")) {
				revs->reverse ^= 1;
				continue;
			}
			if (!strcmp(arg, "--no-walk")) {
				revs->no_walk = 1;
				continue;
			}
			if (!strcmp(arg, "--do-walk")) {
				revs->no_walk = 0;
				continue;
			}

			opts = diff_opt_parse(&revs->diffopt, argv+i, argc-i);
			if (opts > 0) {
				i += opts - 1;
				continue;
			}
			*unrecognized++ = arg;
			left++;
			continue;
		}

		if (handle_revision_arg(arg, revs, flags, seen_dashdash)) {
			int j;
			if (seen_dashdash || *arg == '^')
				die("bad revision '%s'", arg);

			/* If we didn't have a "--":
			 * (1) all filenames must exist;
			 * (2) all rev-args must not be interpretable
			 *     as a valid filename.
			 * but the latter we have checked in the main loop.
			 */
			for (j = i; j < argc; j++)
				verify_filename(revs->prefix, argv[j]);

			revs->prune_data = get_pathspec(revs->prefix,
							argv + i);
			break;
		}
	}

	if (revs->grep_filter) {
		revs->grep_filter->regflags |= regflags;
		revs->grep_filter->fixed = fixed;
	}

	if (show_merge)
		prepare_show_merge(revs);
	if (def && !revs->pending.nr) {
		unsigned char sha1[20];
		struct object *object;
		unsigned mode;
		if (get_sha1_with_mode(def, sha1, &mode))
			die("bad default revision '%s'", def);
		object = get_reference(revs, def, sha1, 0);
		add_pending_object_with_mode(revs, object, def, mode);
	}

	/* Did the user ask for any diff output? Run the diff! */
	if (revs->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT)
		revs->diff = 1;

	/* Pickaxe, diff-filter and rename following need diffs */
	if (revs->diffopt.pickaxe ||
	    revs->diffopt.filter ||
	    DIFF_OPT_TST(&revs->diffopt, FOLLOW_RENAMES))
		revs->diff = 1;

	if (revs->topo_order)
		revs->limited = 1;

	if (revs->prune_data) {
		diff_tree_setup_paths(revs->prune_data, &revs->pruning);
		/* Can't prune commits with rename following: the paths change.. */
		if (!DIFF_OPT_TST(&revs->diffopt, FOLLOW_RENAMES))
			revs->prune = 1;
		if (!revs->full_diff)
			diff_tree_setup_paths(revs->prune_data, &revs->diffopt);
	}
	if (revs->combine_merges) {
		revs->ignore_merges = 0;
		if (revs->dense_combined_merges && !revs->diffopt.output_format)
			revs->diffopt.output_format = DIFF_FORMAT_PATCH;
	}
	revs->diffopt.abbrev = revs->abbrev;
	if (diff_setup_done(&revs->diffopt) < 0)
		die("diff_setup_done failed");

	if (revs->grep_filter) {
		revs->grep_filter->all_match = all_match;
		compile_grep_patterns(revs->grep_filter);
	}

	if (revs->reverse && revs->reflog_info)
		die("cannot combine --reverse with --walk-reflogs");

	/*
	 * Limitations on the graph functionality
	 */
	if (revs->reverse && revs->graph)
		die("cannot combine --reverse with --graph");

	if (revs->reflog_info && revs->graph)
		die("cannot combine --walk-reflogs with --graph");

	return left;
}

Project: git
File: tree-diff.c

static int count_paths(const char **paths)
{
	int i = 0;
	while (*paths++)
		i++;
	return i;
}

Project: git
File: diff.c

static void diff_flush_raw(struct diff_filepair *p, struct diff_options *opt)
{
	int line_termination = opt->line_termination;
	int inter_name_termination = line_termination ? '\t' : '\0';

	if (!(opt->output_format & DIFF_FORMAT_NAME_STATUS)) {
		fprintf(opt->file, ":%06o %06o %s ", p->one->mode, p->two->mode,
			diff_unique_abbrev(p->one->sha1, opt->abbrev));
		fprintf(opt->file, "%s ", diff_unique_abbrev(p->two->sha1, opt->abbrev));
	}
	if (p->score) {
		fprintf(opt->file, "%c%03d%c", p->status, similarity_index(p),
			inter_name_termination);
	} else {
		fprintf(opt->file, "%c%c", p->status, inter_name_termination);
	}

	if (p->status == DIFF_STATUS_COPIED ||
	    p->status == DIFF_STATUS_RENAMED) {
		const char *name_a, *name_b;
		name_a = p->one->path;
		name_b = p->two->path;
		strip_prefix(opt->prefix_length, &name_a, &name_b);
		write_name_quoted(name_a, opt->file, inter_name_termination);
		write_name_quoted(name_b, opt->file, line_termination);
	} else {
		const char *name_a, *name_b;
		name_a = p->one->mode ? p->one->path : p->two->path;
		name_b = NULL;
		strip_prefix(opt->prefix_length, &name_a, &name_b);
		write_name_quoted(name_a, opt->file, line_termination);
	}
}

Project: git
File: tree-diff.c

static int tree_entry_interesting(struct tree_desc *desc, const char *base, int baselen, struct diff_options *opt)
{
	const char *path;
	const unsigned char *sha1;
	unsigned mode;
	int i;
	int pathlen;
	int never_interesting = -1;

	if (!opt->nr_paths)
		return 1;

	sha1 = tree_entry_extract(desc, &path, &mode);

	pathlen = tree_entry_len(path, sha1);

	for (i = 0; i < opt->nr_paths; i++) {
		const char *match = opt->paths[i];
		int matchlen = opt->pathlens[i];
		int m = -1; /* signals that we haven't called strncmp() */

		if (baselen >= matchlen) {
			/* If it doesn't match, move along... */
			if (strncmp(base, match, matchlen))
				continue;

			/*
			 * The base is a subdirectory of a path which
			 * was specified, so all of them are interesting.
			 */
			return 2;
		}

		/* Does the base match? */
		if (strncmp(base, match, baselen))
			continue;

		match += baselen;
		matchlen -= baselen;

		if (never_interesting) {
			/*
			 * We have not seen any match that sorts later
			 * than the current path.
			 */

			/*
			 * Does match sort strictly earlier than path
			 * with their common parts?
			 */
			m = strncmp(match, path,
				    (matchlen < pathlen) ? matchlen : pathlen);
			if (m < 0)
				continue;

			/*
			 * If we come here even once, that means there is at
			 * least one pathspec that would sort equal to or
			 * later than the path we are currently looking at.
			 * In other words, if we have never reached this point
			 * after iterating all pathspecs, it means all
			 * pathspecs are either outside of base, or inside the
			 * base but sorts strictly earlier than the current
			 * one.  In either case, they will never match the
			 * subsequent entries.  In such a case, we initialized
			 * the variable to -1 and that is what will be
			 * returned, allowing the caller to terminate early.
			 */
			never_interesting = 0;
		}

		if (pathlen > matchlen)
			continue;

		if (matchlen > pathlen) {
			if (match[pathlen] != '/')
				continue;
			if (!S_ISDIR(mode))
				continue;
		}

		if (m == -1)
			/*
			 * we cheated and did not do strncmp(), so we do
			 * that here.
			 */
			m = strncmp(match, path, pathlen);

		/*
		 * If common part matched earlier then it is a hit,
		 * because we rejected the case where path is not a
		 * leading directory and is shorter than match.
		 */
		if (!m)
			return 1;
	}
	return never_interesting; /* No matches */
}

Project: git
File: diff.c

static void show_mode_change(FILE *file, struct diff_filepair *p, int show_name)
{
	if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) {
		fprintf(file, " mode change %06o => %06o%c", p->one->mode, p->two->mode,
			show_name ? ' ' : '\n');
		if (show_name) {
			write_name_quoted(p->two->path, file, '\n');
		}
	}
}

Project: git
File: diff.c

static int parse_num(const char **cp_p)
{
	unsigned long num, scale;
	int ch, dot;
	const char *cp = *cp_p;

	num = 0;
	scale = 1;
	dot = 0;
	for(;;) {
		ch = *cp;
		if ( !dot && ch == '.' ) {
			scale = 1;
			dot = 1;
		} else if ( ch == '%' ) {
			scale = dot ? scale*100 : 100;
			cp++;	/* % is always at the end */
			break;
		} else if ( ch >= '0' && ch <= '9' ) {
			if ( scale < 100000 ) {
				scale *= 10;
				num = (num*10) + (ch-'0');
			}
		} else {
			break;
		}
		cp++;
	}
	*cp_p = cp;

	/* user says num divided by scale and we say internally that
	 * is MAX_SCORE * num / scale.
	 */
	return (int)((num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale));
}

Project: git
File: diff.c

void diff_unmerge(struct diff_options *options,
		  const char *path,
		  unsigned mode, const unsigned char *sha1)
{
	struct diff_filespec *one, *two;

	if (options->prefix &&
	    strncmp(path, options->prefix, options->prefix_length))
		return;

	one = alloc_filespec(path);
	two = alloc_filespec(path);
	fill_filespec(one, sha1, mode);
	diff_queue(&diff_queued_diff, one, two)->is_unmerged = 1;
}