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1 | ./reptyr/reptyr.c | /*
* Copyright (C) 2011 by Nelson Elhage
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/select.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <stdarg.h>
#include <termios.h>
#include <signal.h>
#include "reptyr.h"
#ifndef __linux__
#error reptyr is currently Linux-only.
#endif
static int verbose = 0;
void _debug(const char *pfx, const char *msg, va_list ap) {
if (pfx)
fprintf(stderr, "%s", pfx);
vfprintf(stderr, msg, ap);
fprintf(stderr, "\n");
}
void die(const char *msg, ...) {
va_list ap;
va_start(ap, msg);
_debug("[!] ", msg, ap);
va_end(ap);
exit(1);
}
void debug(const char *msg, ...) {
va_list ap;
if (!verbose)
return;
va_start(ap, msg);
_debug("[+] ", msg, ap);
va_end(ap);
}
void error(const char *msg, ...) {
va_list ap;
va_start(ap, msg);
_debug("[-] ", msg, ap);
va_end(ap);
}
void setup_raw(struct termios *save) {
struct termios set;
if (tcgetattr(0, save) < 0)
die("Unable to read terminal attributes: %m");
set = *save;
cfmakeraw(&set);
if (tcsetattr(0, TCSANOW, &set) < 0)
die("Unable to set terminal attributes: %m");
}
void resize_pty(int pty) {
struct winsize sz;
if (ioctl(0, TIOCGWINSZ, &sz) < 0)
return;
ioctl(pty, TIOCSWINSZ, &sz);
}
int writeall(int fd, const void *buf, ssize_t count) {
ssize_t rv;
while (count > 0) {
rv = write(fd, buf, count);
if (rv < 0) {
if (errno == EINTR)
continue;
return rv;
}
count -= rv;
buf += rv;
}
return 0;
}
volatile sig_atomic_t winch_happened = 0;
void do_winch(int signal) {
winch_happened = 1;
}
void do_proxy(int pty) {
char buf[4096];
ssize_t count;
fd_set set;
while (1) {
if (winch_happened) {
winch_happened = 0;
/*
* FIXME: If a signal comes in after this point but before
* select(), the resize will be delayed until we get more
* input. signalfd() is probably the cleanest solution.
*/
resize_pty(pty);
}
FD_ZERO(&set);
FD_SET(0, &set);
FD_SET(pty, &set);
if (select(pty+1, &set, NULL, NULL, NULL) < 0) {
if (errno == EINTR)
continue;
fprintf(stderr, "select: %m");
return;
}
if (FD_ISSET(0, &set)) {
count = read(0, buf, sizeof buf);
if (count < 0)
return;
writeall(pty, buf, count);
}
if (FD_ISSET(pty, &set)) {
count = read(pty, buf, sizeof buf);
if (count < 0)
return;
writeall(1, buf, count);
}
}
}
void usage(char *me) {
fprintf(stderr, "Usage: %s [-s] PID\n", me);
fprintf(stderr, " %s -l|-L [COMMAND [ARGS]]\n", me);
fprintf(stderr, " -l Create a new pty pair and print the name of the slave.\n");
fprintf(stderr, " if there are command-line arguments after -l\n");
fprintf(stderr, " they are executed with REPTYR_PTY set to path of pty.\n");
fprintf(stderr, " -L Like '-l', but also redirect the child's stdio to the slave.\n");
fprintf(stderr, " -s Attach fds 0-2 on the target, even if it is not attached to a tty.\n");
fprintf(stderr, " -h Print this help message and exit.\n");
fprintf(stderr, " -v Print the version number and exit.\n");
fprintf(stderr, " -V Print verbose debug output.\n");
}
void check_yama_ptrace_scope(void) {
int fd = open("/proc/sys/kernel/yama/ptrace_scope", O_RDONLY);
if (fd >= 0) {
char buf[256];
int n;
n = read(fd, buf, sizeof buf);
close(fd);
if (n > 0) {
if (!atoi(buf)) {
return;
}
}
} else if (errno == ENOENT)
return;
fprintf(stderr, "The kernel denied permission while attaching. If your uid matches\n");
fprintf(stderr, "the target's, check the value of /proc/sys/kernel/yama/ptrace_scope.\n");
fprintf(stderr, "For more information, see /etc/sysctl.d/10-ptrace.conf\n");
}
int main(int argc, char **argv) {
struct termios saved_termios;
struct sigaction act;
int pty;
int arg = 1;
int do_attach = 1;
int force_stdio = 0;
int unattached_script_redirection = 0;
if (argc < 2) {
usage(argv[0]);
return 2;
}
if (argv[arg][0] == '-') {
switch(argv[arg][1]) {
case 'h':
usage(argv[0]);
return 0;
case 'l':
do_attach = 0;
break;
case 'L':
do_attach = 0;
unattached_script_redirection = 1;
break;
case 's':
arg++;
force_stdio = 1;
break;
case 'v':
printf("This is reptyr version %s.\n", REPTYR_VERSION);
printf(" by Nelson Elhage <nelhage@nelhage.com>\n");
printf("http://github.com/nelhage/reptyr/\n");
return 0;
case 'V':
arg++;
verbose = 1;
break;
default:
usage(argv[0]);
return 1;
}
}
if (do_attach && arg >= argc) {
fprintf(stderr, "%s: No pid specified to attach\n", argv[0]);
usage(argv[0]);
return 1;
}
if ((pty = open("/dev/ptmx", O_RDWR|O_NOCTTY)) < 0)
die("Unable to open /dev/ptmx: %m");
if (unlockpt(pty) < 0)
die("Unable to unlockpt: %m");
if (grantpt(pty) < 0)
die("Unable to grantpt: %m");
if (do_attach) {
pid_t child = atoi(argv[arg]);
int err;
if ((err = attach_child(child, ptsname(pty), force_stdio))) {
fprintf(stderr, "Unable to attach to pid %d: %s\n", child, strerror(err));
if (err == EPERM) {
check_yama_ptrace_scope();
}
return 1;
}
} else {
printf("Opened a new pty: %s\n", ptsname(pty));
fflush(stdout);
if (argc > 2) {
if(!fork()) {
setenv("REPTYR_PTY", ptsname(pty), 1);
if (unattached_script_redirection) {
int f;
setpgid(0, getppid());
setsid();
f = open(ptsname(pty), O_RDONLY, 0); dup2(f, 0); close(f);
f = open(ptsname(pty), O_WRONLY, 0); dup2(f, 1); dup2(f,2); close(f);
}
close(pty);
execvp(argv[2], argv+2);
exit(1);
}
}
}
setup_raw(&saved_termios);
memset(&act, 0, sizeof act);
act.sa_handler = do_winch;
act.sa_flags = 0;
sigaction(SIGWINCH, &act, NULL);
resize_pty(pty);
do_proxy(pty);
tcsetattr(0, TCSANOW, &saved_termios);
return 0;
}
|
2 | ./reptyr/attach.c | /*
* Copyright (C) 2011 by Nelson Elhage
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <sys/types.h>
#include <dirent.h>
#include <sys/syscall.h>
#include <sys/mman.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <errno.h>
#include <termios.h>
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <signal.h>
#include <limits.h>
#include <time.h>
#include <sys/time.h>
#include <sys/stat.h>
#include "ptrace.h"
#include "reptyr.h"
#define TASK_COMM_LENGTH 16
struct proc_stat {
pid_t pid;
char comm[TASK_COMM_LENGTH+1];
char state;
pid_t ppid, sid, pgid;
dev_t ctty;
};
#define do_syscall(child, name, a0, a1, a2, a3, a4, a5) \
ptrace_remote_syscall((child), ptrace_syscall_numbers((child))->nr_##name, \
a0, a1, a2, a3, a4, a5)
int parse_proc_stat(int statfd, struct proc_stat *out) {
char buf[1024];
int n;
unsigned dev;
lseek(statfd, 0, SEEK_SET);
if (read(statfd, buf, sizeof buf) < 0)
return errno;
n = sscanf(buf, "%d (%16[^)]) %c %d %d %d %u",
&out->pid, out->comm,
&out->state, &out->ppid, &out->sid,
&out->pgid, &dev);
if (n == EOF)
return errno;
if (n != 7) {
return EINVAL;
}
out->ctty = dev;
return 0;
}
int read_proc_stat(pid_t pid, struct proc_stat *out) {
char stat_path[PATH_MAX];
int statfd;
int err;
snprintf(stat_path, sizeof stat_path, "/proc/%d/stat", pid);
statfd = open(stat_path, O_RDONLY);
if (statfd < 0) {
error("Unable to open %s: %s", stat_path, strerror(errno));
return -statfd;
}
err = parse_proc_stat(statfd, out);
close(statfd);
return err;
}
static void do_unmap(struct ptrace_child *child, child_addr_t addr, unsigned long len) {
if (addr == (unsigned long)-1)
return;
do_syscall(child, munmap, addr, len, 0, 0, 0, 0);
}
int *get_child_tty_fds(struct ptrace_child *child, int statfd, int *count) {
struct proc_stat child_status;
struct stat tty_st, st;
char buf[PATH_MAX];
int n = 0, allocated = 0;
int *fds = NULL;
DIR *dir;
struct dirent *d;
int *tmp = NULL;
debug("Looking up fds for tty in child.");
if ((child->error = parse_proc_stat(statfd, &child_status)))
return NULL;
debug("Resolved child tty: %x", (unsigned)child_status.ctty);
if (stat("/dev/tty", &tty_st) < 0) {
child->error = errno;
error("Unable to stat /dev/tty");
return NULL;
}
snprintf(buf, sizeof buf, "/proc/%d/fd/", child->pid);
if ((dir = opendir(buf)) == NULL)
return NULL;
while ((d = readdir(dir)) != NULL) {
if (d->d_name[0] == '.') continue;
snprintf(buf, sizeof buf, "/proc/%d/fd/%s", child->pid, d->d_name);
if (stat(buf, &st) < 0)
continue;
if (st.st_rdev == child_status.ctty
|| st.st_rdev == tty_st.st_rdev) {
if (n == allocated) {
allocated = allocated ? 2 * allocated : 2;
tmp = realloc(fds, allocated * sizeof *tmp);
if (tmp == NULL) {
child->error = errno;
error("Unable to allocate memory for fd array.");
free(fds);
fds = NULL;
goto out;
}
fds = tmp;
}
debug("Found an alias for the tty: %s", d->d_name);
fds[n++] = atoi(d->d_name);
}
}
out:
*count = n;
closedir(dir);
return fds;
}
void move_process_group(struct ptrace_child *child, pid_t from, pid_t to) {
DIR *dir;
struct dirent *d;
pid_t pid;
char *p;
int err;
if ((dir = opendir("/proc/")) == NULL)
return;
while ((d = readdir(dir)) != NULL) {
if (d->d_name[0] == '.') continue;
pid = strtol(d->d_name, &p, 10);
if (*p) continue;
if (getpgid(pid) == from) {
debug("Change pgid for pid %d", pid);
err = do_syscall(child, setpgid, pid, to, 0, 0, 0, 0);
if (err < 0)
error(" failed: %s", strerror(-err));
}
}
closedir(dir);
}
int do_setsid(struct ptrace_child *child) {
int err = 0;
struct ptrace_child dummy;
err = do_syscall(child, fork, 0, 0, 0, 0, 0, 0);
if (err < 0)
return err;
debug("Forked a child: %ld", child->forked_pid);
err = ptrace_finish_attach(&dummy, child->forked_pid);
if (err < 0)
goto out_kill;
dummy.state = ptrace_after_syscall;
memcpy(&dummy.user, &child->user, sizeof child->user);
if (ptrace_restore_regs(&dummy)) {
err = dummy.error;
goto out_kill;
}
err = do_syscall(&dummy, setpgid, 0, 0, 0, 0, 0, 0);
if (err < 0) {
error("Failed to setpgid: %s", strerror(-err));
goto out_kill;
}
move_process_group(child, child->pid, dummy.pid);
err = do_syscall(child, setsid, 0, 0, 0, 0, 0, 0);
if (err < 0) {
error("Failed to setsid: %s", strerror(-err));
move_process_group(child, dummy.pid, child->pid);
goto out_kill;
}
debug("Did setsid()");
out_kill:
kill(dummy.pid, SIGKILL);
ptrace_detach_child(&dummy);
ptrace_wait(&dummy);
do_syscall(child, wait4, dummy.pid, 0, WNOHANG, 0, 0, 0);
return err;
}
int ignore_hup(struct ptrace_child *child, unsigned long scratch_page) {
int err;
if (ptrace_syscall_numbers(child)->nr_signal != -1) {
err = do_syscall(child, signal, SIGHUP, (unsigned long)SIG_IGN, 0, 0, 0, 0);
} else {
struct sigaction act = {
.sa_handler = SIG_IGN,
};
err = ptrace_memcpy_to_child(child, scratch_page,
&act, sizeof act);
if (err < 0)
return err;
err = do_syscall(child, rt_sigaction,
SIGHUP, scratch_page,
0, 8, 0, 0);
}
return err;
}
/*
* Wait for the specific pid to enter state 'T', or stopped. We have to pull the
* /proc file rather than attaching with ptrace() and doing a wait() because
* half the point of this exercise is for the process's real parent (the shell)
* to see the TSTP.
*
* In case the process is masking or ignoring SIGTSTP, we time out after a
* second and continue with the attach -- it'll still work mostly right, you
* just won't get the old shell back.
*/
void wait_for_stop(pid_t pid, int fd) {
struct timeval start, now;
struct timespec sleep;
struct proc_stat st;
gettimeofday(&start, NULL);
while (1) {
gettimeofday(&now, NULL);
if ((now.tv_sec > start.tv_sec && now.tv_usec > start.tv_usec)
|| (now.tv_sec - start.tv_sec > 1)) {
error("Timed out waiting for child stop.");
break;
}
/*
* If anything goes wrong reading or parsing the stat node, just give
* up.
*/
if (parse_proc_stat(fd, &st))
break;
if (st.state == 'T')
break;
sleep.tv_sec = 0;
sleep.tv_nsec = 10000000;
nanosleep(&sleep, NULL);
}
}
int copy_tty_state(pid_t pid, const char *pty) {
char buf[PATH_MAX];
int fd, err = EINVAL;
struct termios tio;
int i;
for (i = 0; i < 3 && err; i++) {
err = 0;
snprintf(buf, sizeof buf, "/proc/%d/fd/%d", pid, i);
if ((fd = open(buf, O_RDONLY)) < 0) {
err = -fd;
continue;
}
if (!isatty(fd)) {
err = ENOTTY;
goto retry;
}
if (tcgetattr(fd, &tio) < 0) {
err = -errno;
}
retry:
close(fd);
}
if (err)
return err;
if ((fd = open(pty, O_RDONLY)) < 0)
return -errno;
if (tcsetattr(fd, TCSANOW, &tio) < 0)
err = errno;
close(fd);
return -err;
}
int check_pgroup(pid_t target) {
pid_t pg;
DIR *dir;
struct dirent *d;
pid_t pid;
char *p;
int err = 0;
struct proc_stat pid_stat;
debug("Checking for problematic process group members...");
pg = getpgid(target);
if (pg < 0) {
error("Unable to get pgid (does process %d exist?)", (int)target);
return pg;
}
if ((dir = opendir("/proc/")) == NULL)
return errno;
while ((d = readdir(dir)) != NULL) {
if (d->d_name[0] == '.') continue;
pid = strtol(d->d_name, &p, 10);
if (*p) continue;
if (pid == target) continue;
if (getpgid(pid) == pg) {
/*
* We are actually being somewhat overly-conservative here
* -- if pid is a child of target, and has not yet called
* execve(), reptyr's setpgid() strategy may suffice. That
* is a fairly rare case, and annoying to check for, so
* for now let's just bail out.
*/
if ((err = read_proc_stat(pid, &pid_stat))) {
memcpy(pid_stat.comm, "???", 4);
}
error("Process %d (%.*s) shares %d's process group. Unable to attach.\n"
"(This most commonly means that %d has a suprocesses).",
(int)pid, TASK_COMM_LENGTH, pid_stat.comm, (int)target, (int)target);
err = EINVAL;
goto out;
}
}
out:
closedir(dir);
return err;
}
int attach_child(pid_t pid, const char *pty, int force_stdio) {
struct ptrace_child child;
unsigned long scratch_page = -1;
int *child_tty_fds = NULL, n_fds, child_fd, statfd;
int i;
int err = 0;
long page_size = sysconf(_SC_PAGE_SIZE);
char stat_path[PATH_MAX];
long mmap_syscall;
if ((err = check_pgroup(pid))) {
return err;
}
if ((err = copy_tty_state(pid, pty))) {
if (err == ENOTTY && !force_stdio) {
error("Target is not connected to a terminal.\n"
" Use -s to force attaching anyways.");
return err;
}
}
snprintf(stat_path, sizeof stat_path, "/proc/%d/stat", pid);
statfd = open(stat_path, O_RDONLY);
if (statfd < 0) {
error("Unable to open %s: %s", stat_path, strerror(errno));
return -statfd;
}
kill(pid, SIGTSTP);
wait_for_stop(pid, statfd);
if (ptrace_attach_child(&child, pid)) {
err = child.error;
goto out_cont;
}
if (ptrace_advance_to_state(&child, ptrace_at_syscall)) {
err = child.error;
goto out_detach;
}
if (ptrace_save_regs(&child)) {
err = child.error;
goto out_detach;
}
mmap_syscall = ptrace_syscall_numbers(&child)->nr_mmap2;
if (mmap_syscall == -1)
mmap_syscall = ptrace_syscall_numbers(&child)->nr_mmap;
scratch_page = ptrace_remote_syscall(&child, mmap_syscall, 0,
page_size, PROT_READ|PROT_WRITE,
MAP_ANONYMOUS|MAP_PRIVATE, 0, 0);
if (scratch_page > (unsigned long)-1000) {
err = -(signed long)scratch_page;
goto out_unmap;
}
debug("Allocated scratch page: %lx", scratch_page);
if (force_stdio) {
child_tty_fds = malloc(3 * sizeof(int));
if (!child_tty_fds) {
err = ENOMEM;
goto out_unmap;
}
n_fds = 3;
child_tty_fds[0] = 0;
child_tty_fds[1] = 1;
child_tty_fds[2] = 2;
} else {
child_tty_fds = get_child_tty_fds(&child, statfd, &n_fds);
if (!child_tty_fds) {
err = child.error;
goto out_unmap;
}
}
if (ptrace_memcpy_to_child(&child, scratch_page, pty, strlen(pty)+1)) {
err = child.error;
error("Unable to memcpy the pty path to child.");
goto out_free_fds;
}
child_fd = do_syscall(&child, open,
scratch_page, O_RDWR|O_NOCTTY,
0, 0, 0, 0);
if (child_fd < 0) {
err = child_fd;
error("Unable to open the tty in the child.");
goto out_free_fds;
}
debug("Opened the new tty in the child: %d", child_fd);
err = ignore_hup(&child, scratch_page);
if (err < 0)
goto out_close;
err = do_syscall(&child, getsid, 0, 0, 0, 0, 0, 0);
if (err != child.pid) {
debug("Target is not a session leader, attempting to setsid.");
err = do_setsid(&child);
} else {
do_syscall(&child, ioctl, child_tty_fds[0], TIOCNOTTY, 0, 0, 0, 0);
}
if (err < 0)
goto out_close;
err = do_syscall(&child, ioctl, child_fd, TIOCSCTTY, 0, 0, 0, 0);
if (err < 0) {
error("Unable to set controlling terminal.");
goto out_close;
}
debug("Set the controlling tty");
for (i = 0; i < n_fds; i++)
do_syscall(&child, dup2, child_fd, child_tty_fds[i], 0, 0, 0, 0);
err = 0;
out_close:
do_syscall(&child, close, child_fd, 0, 0, 0, 0, 0);
out_free_fds:
free(child_tty_fds);
out_unmap:
do_unmap(&child, scratch_page, page_size);
ptrace_restore_regs(&child);
out_detach:
ptrace_detach_child(&child);
if (err == 0) {
kill(child.pid, SIGSTOP);
wait_for_stop(child.pid, statfd);
}
kill(child.pid, SIGWINCH);
out_cont:
kill(child.pid, SIGCONT);
close(statfd);
return err < 0 ? -err : err;
}
|
3 | ./reptyr/ptrace.c | /*
* Copyright (C) 2011 by Nelson Elhage
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <sys/ptrace.h>
#include <asm/ptrace.h>
#include <sys/types.h>
#include <sys/user.h>
#include <sys/wait.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <sys/syscall.h>
#include <sys/mman.h>
#include <assert.h>
#include <stddef.h>
#include "ptrace.h"
/*
* RHEL 5's kernel supports these flags, but their libc doesn't ship a ptrace.h
* that defines them. Define them here, and if our kernel doesn't support them,
* we'll find out when PTRACE_SETOPTIONS fails.
*/
#ifndef PTRACE_O_TRACESYSGOOD
#define PTRACE_O_TRACESYSGOOD 0x00000001
#endif
#ifndef PTRACE_O_TRACEFORK
#define PTRACE_O_TRACEFORK 0x00000002
#endif
#ifndef PTRACE_EVENT_FORK
#define PTRACE_EVENT_FORK 1
#endif
#define min(x, y) ({ \
typeof(x) _min1 = (x); \
typeof(y) _min2 = (y); \
_min1 < _min2 ? _min1 : _min2; })
static long __ptrace_command(struct ptrace_child *child, enum __ptrace_request req,
void *, void*);
#define ptrace_command(cld, req, ...) _ptrace_command(cld, req, ## __VA_ARGS__, NULL, NULL)
#define _ptrace_command(cld, req, addr, data, ...) __ptrace_command((cld), (req), (void*)(addr), (void*)(data))
struct ptrace_personality {
size_t syscall_rv;
size_t syscall_arg0;
size_t syscall_arg1;
size_t syscall_arg2;
size_t syscall_arg3;
size_t syscall_arg4;
size_t syscall_arg5;
size_t reg_ip;
};
static struct ptrace_personality *personality(struct ptrace_child *child);
#if defined(__amd64__)
#include "arch/amd64.h"
#elif defined(__i386__)
#include "arch/i386.h"
#elif defined(__arm__)
#include "arch/arm.h"
#else
#error Unsupported architecture.
#endif
#ifndef ARCH_HAVE_MULTIPLE_PERSONALITIES
int arch_get_personality(struct ptrace_child *child) {
return 0;
}
struct syscall_numbers arch_syscall_numbers[] = {
#include "arch/default-syscalls.h"
};
#endif
static struct ptrace_personality *personality(struct ptrace_child *child) {
return &arch_personality[child->personality];
}
struct syscall_numbers *ptrace_syscall_numbers(struct ptrace_child *child) {
return &arch_syscall_numbers[child->personality];
}
int ptrace_attach_child(struct ptrace_child *child, pid_t pid) {
memset(child, 0, sizeof *child);
child->pid = pid;
if (ptrace_command(child, PTRACE_ATTACH) < 0)
return -1;
return ptrace_finish_attach(child, pid);
}
int ptrace_finish_attach(struct ptrace_child *child, pid_t pid) {
memset(child, 0, sizeof *child);
child->pid = pid;
kill(pid, SIGCONT);
if (ptrace_wait(child) < 0)
goto detach;
if (arch_get_personality(child))
goto detach;
if (ptrace_command(child, PTRACE_SETOPTIONS, 0,
PTRACE_O_TRACESYSGOOD|PTRACE_O_TRACEFORK) < 0)
goto detach;
return 0;
detach:
/* Don't clobber child->error */
ptrace(PTRACE_DETACH, child->pid, 0, 0);
return -1;
}
int ptrace_detach_child(struct ptrace_child *child) {
if (ptrace_command(child, PTRACE_DETACH, 0, 0) < 0)
return -1;
child->state = ptrace_detached;
return 0;
}
int ptrace_wait(struct ptrace_child *child) {
if (waitpid(child->pid, &child->status, 0) < 0) {
child->error = errno;
return -1;
}
if (WIFEXITED(child->status) || WIFSIGNALED(child->status)) {
child->state = ptrace_exited;
} else if (WIFSTOPPED(child->status)) {
int sig = WSTOPSIG(child->status);
if (sig & 0x80) {
child->state = (child->state == ptrace_at_syscall) ?
ptrace_after_syscall : ptrace_at_syscall;
} else {
if (sig == SIGTRAP && (((child->status >> 8) & PTRACE_EVENT_FORK) == PTRACE_EVENT_FORK))
ptrace_command(child, PTRACE_GETEVENTMSG, 0, &child->forked_pid);
if (child->state != ptrace_at_syscall)
child->state = ptrace_stopped;
}
} else {
child->error = EINVAL;
return -1;
}
return 0;
}
int ptrace_advance_to_state(struct ptrace_child *child,
enum child_state desired) {
int err;
while (child->state != desired) {
switch(desired) {
case ptrace_after_syscall:
case ptrace_at_syscall:
if (WIFSTOPPED(child->status) && WSTOPSIG(child->status) == SIGSEGV) {
child->error = EAGAIN;
return -1;
}
err = ptrace_command(child, PTRACE_SYSCALL, 0, 0);
break;
case ptrace_running:
return ptrace_command(child, PTRACE_CONT, 0, 0);
case ptrace_stopped:
err = kill(child->pid, SIGSTOP);
if (err < 0)
child->error = errno;
break;
default:
child->error = EINVAL;
return -1;
}
if (err < 0)
return err;
if (ptrace_wait(child) < 0)
return -1;
}
return 0;
}
int ptrace_save_regs(struct ptrace_child *child) {
if (ptrace_advance_to_state(child, ptrace_at_syscall) < 0)
return -1;
if (ptrace_command(child, PTRACE_GETREGS, 0, &child->user) < 0)
return -1;
arch_fixup_regs(child);
if (arch_save_syscall(child) < 0)
return -1;
return 0;
}
int ptrace_restore_regs(struct ptrace_child *child) {
int err;
err = ptrace_command(child, PTRACE_SETREGS, 0, &child->user);
if (err < 0)
return err;
return arch_restore_syscall(child);
}
unsigned long ptrace_remote_syscall(struct ptrace_child *child,
unsigned long sysno,
unsigned long p0, unsigned long p1,
unsigned long p2, unsigned long p3,
unsigned long p4, unsigned long p5) {
unsigned long rv;
if (ptrace_advance_to_state(child, ptrace_at_syscall) < 0)
return -1;
#define setreg(r, v) do { \
if (ptrace_command(child, PTRACE_POKEUSER, \
personality(child)->r, \
(v)) < 0) \
return -1; \
} while (0)
if (arch_set_syscall(child, sysno) < 0)
return -1;
setreg(syscall_arg0, p0);
setreg(syscall_arg1, p1);
setreg(syscall_arg2, p2);
setreg(syscall_arg3, p3);
setreg(syscall_arg4, p4);
setreg(syscall_arg5, p5);
if (ptrace_advance_to_state(child, ptrace_after_syscall) < 0)
return -1;
rv = ptrace_command(child, PTRACE_PEEKUSER,
personality(child)->syscall_rv);
if (child->error)
return -1;
setreg(reg_ip, *(unsigned long*)((void*)&child->user +
personality(child)->reg_ip));
#undef setreg
return rv;
}
int ptrace_memcpy_to_child(struct ptrace_child *child, child_addr_t dst, const void *src, size_t n) {
unsigned long scratch;
while (n >= sizeof(unsigned long)) {
if (ptrace_command(child, PTRACE_POKEDATA, dst, *((unsigned long*)src)) < 0)
return -1;
dst += sizeof(unsigned long);
src += sizeof(unsigned long);
n -= sizeof(unsigned long);
}
if (n) {
scratch = ptrace_command(child, PTRACE_PEEKDATA, dst);
if (child->error)
return -1;
memcpy(&scratch, src, n);
if (ptrace_command(child, PTRACE_POKEDATA, dst, scratch) < 0)
return -1;
}
return 0;
}
int ptrace_memcpy_from_child(struct ptrace_child *child, void *dst, child_addr_t src, size_t n) {
unsigned long scratch;
while (n) {
scratch = ptrace_command(child, PTRACE_PEEKDATA, src);
if (child->error) return -1;
memcpy(dst, &scratch, min(n, sizeof(unsigned long)));
dst += sizeof(unsigned long);
src += sizeof(unsigned long);
if (n >= sizeof(unsigned long))
n -= sizeof(unsigned long);
else
n = 0;
}
return 0;
}
static long __ptrace_command(struct ptrace_child *child, enum __ptrace_request req,
void *addr, void *data) {
long rv;
errno = 0;
rv = ptrace(req, child->pid, addr, data);
child->error = errno;
return rv;
}
#ifdef BUILD_PTRACE_MAIN
int main(int argc, char **argv) {
struct ptrace_child child;
pid_t pid;
if (argc < 2) {
printf("Usage: %s pid\n", argv[0]);
return 1;
}
pid = atoi(argv[1]);
assert(!ptrace_attach_child(&child, pid));
assert(!ptrace_save_regs(&child));
printf("mmap = %lx\n", ptrace_remote_syscall(&child, mmap_syscall, 0,
4096, PROT_READ|PROT_WRITE,
MAP_ANONYMOUS|MAP_PRIVATE, 0, 0));
reset_user_struct(&child.user);
assert(!ptrace_restore_regs(&child));
assert(!ptrace_detach_child(&child));
return 0;
}
#endif
|
4 | ./pgmp/sandbox/hello/hello.c | /* A test program to study the mpz_t structure.
*
* Copyright (C) 2011 Daniele Varrazzo
*/
#include <stdio.h>
#include <gmp.h>
int
main(int argc, char **argv)
{
mpz_t z1, z2;
mpz_init_set_ui(z1, ~((unsigned long int)0));
mpz_init(z2);
mpz_add_ui(z2, z1, 1);
mpz_out_str(stdout, 10, z2);
printf("\n");
return 0;
}
|
5 | ./pgmp/src/pgmp_utils.c | /* pgmp_utils -- misc utility module
*
* Copyright (C) 2011 Daniele Varrazzo
*
* This file is part of the PostgreSQL GMP Module
*
* The PostgreSQL GMP Module is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* The PostgreSQL GMP Module is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the PostgreSQL GMP Module. If not, see
* http://www.gnu.org/licenses/.
*/
#include "pgmp_utils.h"
#if PG_VERSION_NUM < 90000
#include "nodes/nodes.h" /* for IsA */
#include "nodes/execnodes.h" /* for AggState */
/*
* AggCheckCallContext - test if a SQL function is being called as an aggregate
*
* The function is available from PG 9.0. This allows compatibility with
* previous versions.
*/
int
AggCheckCallContext(FunctionCallInfo fcinfo, MemoryContext *aggcontext)
{
if (fcinfo->context && IsA(fcinfo->context, AggState))
{
if (aggcontext) {
*aggcontext = ((AggState *) fcinfo->context)->aggcontext;
}
return AGG_CONTEXT_AGGREGATE;
}
#if PG_VERSION_NUM >= 80400
if (fcinfo->context && IsA(fcinfo->context, WindowAggState))
{
if (aggcontext) {
/* different from PG 9.0: in PG 8.4 there is no aggcontext */
*aggcontext = ((WindowAggState *) fcinfo->context)->wincontext;
}
return AGG_CONTEXT_WINDOW;
}
#endif
/* this is just to prevent "uninitialized variable" warnings */
if (aggcontext) {
*aggcontext = NULL;
}
return 0;
}
#endif
|
6 | ./pgmp/src/pmpz_agg.c | /* pmpz_agg -- mpz aggregation functions
*
* Copyright (C) 2011 Daniele Varrazzo
*
* This file is part of the PostgreSQL GMP Module
*
* The PostgreSQL GMP Module is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* The PostgreSQL GMP Module is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the PostgreSQL GMP Module. If not, see
* http://www.gnu.org/licenses/.
*/
#include "pmpz.h"
#include "pgmp_utils.h" /* for AggCheckCallContext on PG < 9.0 */
#include "pgmp-impl.h"
#include "fmgr.h"
/* Convert an inplace accumulator into a pmpz structure.
*
* This function is strict, so don't care about NULLs
*/
PGMP_PG_FUNCTION(_pmpz_from_agg)
{
mpz_t *a;
a = (mpz_t *)PG_GETARG_POINTER(0);
PGMP_RETURN_MPZ(*a);
}
/* Macro to create an accumulation function from a gmp operator.
*
* This function can't be strict because the internal state is not compatible
* with the base type.
*/
#define PMPZ_AGG(op, BLOCK, rel) \
\
PGMP_PG_FUNCTION(_pmpz_agg_ ## op) \
{ \
mpz_t *a; \
const mpz_t z; \
MemoryContext oldctx; \
MemoryContext aggctx; \
\
if (UNLIKELY(!AggCheckCallContext(fcinfo, &aggctx))) \
{ \
ereport(ERROR, \
(errcode(ERRCODE_DATA_EXCEPTION), \
errmsg("_mpz_agg_" #op " can only be called in accumulation"))); \
} \
\
if (PG_ARGISNULL(1)) { \
if (PG_ARGISNULL(0)) { \
PG_RETURN_NULL(); \
} \
else { \
PG_RETURN_POINTER(PG_GETARG_POINTER(0)); \
} \
} \
\
PGMP_GETARG_MPZ(z, 1); \
\
oldctx = MemoryContextSwitchTo(aggctx); \
\
if (LIKELY(!PG_ARGISNULL(0))) { \
a = (mpz_t *)PG_GETARG_POINTER(0); \
BLOCK(op, rel); \
} \
else { /* uninitialized */ \
a = (mpz_t *)palloc(sizeof(mpz_t)); \
mpz_init_set(*a, z); \
} \
\
MemoryContextSwitchTo(oldctx); \
\
PG_RETURN_POINTER(a); \
}
#define PMPZ_AGG_OP(op, rel) \
mpz_ ## op (*a, *a, z)
PMPZ_AGG(add, PMPZ_AGG_OP, 0)
PMPZ_AGG(mul, PMPZ_AGG_OP, 0)
PMPZ_AGG(and, PMPZ_AGG_OP, 0)
PMPZ_AGG(ior, PMPZ_AGG_OP, 0)
PMPZ_AGG(xor, PMPZ_AGG_OP, 0)
#define PMPZ_AGG_REL(op, rel) \
do { \
if (mpz_cmp(*a, z) rel 0) { \
mpz_set(*a, z); \
} \
} while (0)
PMPZ_AGG(min, PMPZ_AGG_REL, >)
PMPZ_AGG(max, PMPZ_AGG_REL, <)
|
7 | ./pgmp/src/pmpq_io.c | /* pmpq_io -- mpq Input/Output functions
*
* Copyright (C) 2011 Daniele Varrazzo
*
* This file is part of the PostgreSQL GMP Module
*
* The PostgreSQL GMP Module is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* The PostgreSQL GMP Module is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the PostgreSQL GMP Module. If not, see
* http://www.gnu.org/licenses/.
*/
#include "pmpq.h"
#include "pmpz.h"
#include "pgmp-impl.h"
#include "fmgr.h"
#include "utils/builtins.h" /* for numeric_out */
#include <string.h>
/*
* Input/Output functions
*/
PGMP_PG_FUNCTION(pmpq_in)
{
char *str;
mpq_t q;
str = PG_GETARG_CSTRING(0);
mpq_init(q);
if (0 != mpq_set_str(q, str, 0))
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("invalid input syntax for mpq: \"%s\"",
str)));
}
ERROR_IF_DENOM_ZERO(mpq_denref(q));
mpq_canonicalize(q);
PGMP_RETURN_MPQ(q);
}
PGMP_PG_FUNCTION(pmpq_in_base)
{
int base;
char *str;
mpq_t q;
base = PG_GETARG_INT32(1);
if (!(base == 0 || (2 <= base && base <= PGMP_MAXBASE_IO)))
{
ereport(ERROR, (
errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("invalid base for mpq input: %d", base),
errhint("base should be between 2 and %d", PGMP_MAXBASE_IO)));
}
str = TextDatumGetCString(PG_GETARG_POINTER(0));
mpq_init(q);
if (0 != mpq_set_str(q, str, base))
{
const char *ell;
const int maxchars = 50;
ell = (strlen(str) > maxchars) ? "..." : "";
ereport(ERROR, (
errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("invalid input for mpq base %d: \"%.*s%s\"",
base, 50, str, ell)));
}
ERROR_IF_DENOM_ZERO(mpq_denref(q));
mpq_canonicalize(q);
PGMP_RETURN_MPQ(q);
}
PGMP_PG_FUNCTION(pmpq_out)
{
const mpq_t q;
char *buf;
PGMP_GETARG_MPQ(q, 0);
/* Allocate the output buffer manually - see mpmz_out to know why */
buf = palloc(3 /* add sign, slash and null */
+ mpz_sizeinbase(mpq_numref(q), 10)
+ mpz_sizeinbase(mpq_denref(q), 10));
PG_RETURN_CSTRING(mpq_get_str(buf, 10, q));
}
PGMP_PG_FUNCTION(pmpq_out_base)
{
const mpq_t q;
int base;
char *buf;
PGMP_GETARG_MPQ(q, 0);
base = PG_GETARG_INT32(1);
if (!((-36 <= base && base <= -2) ||
(2 <= base && base <= PGMP_MAXBASE_IO)))
{
ereport(ERROR, (
errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("invalid base for mpq output: %d", base),
errhint("base should be between -36 and -2 or between 2 and %d",
PGMP_MAXBASE_IO)));
}
/* Allocate the output buffer manually - see mpmz_out to know why */
buf = palloc(3 /* add sign, slash and null */
+ mpz_sizeinbase(mpq_numref(q), ABS(base))
+ mpz_sizeinbase(mpq_denref(q), ABS(base)));
PG_RETURN_CSTRING(mpq_get_str(buf, base, q));
}
/*
* Cast functions
*/
static Datum _pmpq_from_long(long in);
PGMP_PG_FUNCTION(pmpq_from_int2)
{
int16 in = PG_GETARG_INT16(0);
return _pmpq_from_long(in);
}
PGMP_PG_FUNCTION(pmpq_from_int4)
{
int32 in = PG_GETARG_INT32(0);
return _pmpq_from_long(in);
}
static Datum
_pmpq_from_long(long in)
{
mpq_t q;
mpz_init_set_si(mpq_numref(q), in);
mpz_init_set_si(mpq_denref(q), 1L);
PGMP_RETURN_MPQ(q);
}
static Datum _pmpq_from_double(double in);
PGMP_PG_FUNCTION(pmpq_from_float4)
{
double in = (double)PG_GETARG_FLOAT4(0);
return _pmpq_from_double(in);
}
PGMP_PG_FUNCTION(pmpq_from_float8)
{
double in = PG_GETARG_FLOAT8(0);
return _pmpq_from_double(in);
}
static Datum
_pmpq_from_double(double in)
{
mpq_t q;
mpq_init(q);
mpq_set_d(q, in);
PGMP_RETURN_MPQ(q);
}
/* to convert from int8 we piggyback all the mess we've made for mpz */
Datum pmpz_from_int8(PG_FUNCTION_ARGS);
PGMP_PG_FUNCTION(pmpq_from_int8)
{
mpq_t q;
mpz_t tmp;
mpz_from_pmpz(tmp,
(pmpz *)DirectFunctionCall1(pmpz_from_int8,
PG_GETARG_DATUM(0)));
/* Make a copy of the num as MPQ will try to realloc on it */
mpz_init_set(mpq_numref(q), tmp);
mpz_init_set_si(mpq_denref(q), 1L);
PGMP_RETURN_MPQ(q);
}
/* To convert from numeric we convert the numeric in str, then work on that */
PGMP_PG_FUNCTION(pmpq_from_numeric)
{
mpq_t q;
char *sn, *pn;
sn = DatumGetCString(DirectFunctionCall1(numeric_out,
PG_GETARG_DATUM(0)));
if ((pn = strchr(sn, '.')))
{
char *sd, *pd;
/* Convert "123.45" into "12345" and produce "100" in the process. */
pd = sd = (char *)palloc(strlen(sn));
*pd++ = '1';
while (pn[1])
{
pn[0] = pn[1];
++pn;
*pd++ = '0';
}
*pd = *pn = '\0';
if (0 != mpz_init_set_str(mpq_numref(q), sn, 10)) {
goto error;
}
mpz_init_set_str(mpq_denref(q), sd, 10);
mpq_canonicalize(q);
}
else {
/* just an integer */
if (0 != mpz_init_set_str(mpq_numref(q), sn, 10)) {
goto error;
}
mpz_init_set_si(mpq_denref(q), 1L);
}
PGMP_RETURN_MPQ(q);
error:
ereport(ERROR, (
errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("can't convert numeric value to mpq: \"%s\"", sn)));
PG_RETURN_NULL();
}
PGMP_PG_FUNCTION(pmpq_from_mpz)
{
mpq_t q;
mpz_t tmp;
/* Make a copy of the num as MPQ will try to realloc on it */
PGMP_GETARG_MPZ(tmp, 0);
mpz_init_set(mpq_numref(q), tmp);
mpz_init_set_si(mpq_denref(q), 1L);
PGMP_RETURN_MPQ(q);
}
PGMP_PG_FUNCTION(pmpq_to_mpz)
{
const mpq_t q;
mpz_t z;
PGMP_GETARG_MPQ(q, 0);
mpz_init(z);
mpz_set_q(z, q);
PGMP_RETURN_MPZ(z);
}
#define PMPQ_TO_INT(type) \
\
Datum pmpz_to_ ## type (PG_FUNCTION_ARGS); \
\
PGMP_PG_FUNCTION(pmpq_to_ ## type) \
{ \
const mpq_t q; \
mpz_t z; \
\
PGMP_GETARG_MPQ(q, 0); \
\
mpz_init(z); \
mpz_set_q(z, q); \
\
return DirectFunctionCall1(pmpz_to_ ## type, (Datum)pmpz_from_mpz(z)); \
}
PMPQ_TO_INT(int2)
PMPQ_TO_INT(int4)
PMPQ_TO_INT(int8)
PGMP_PG_FUNCTION(pmpq_to_float4)
{
const mpq_t q;
PGMP_GETARG_MPQ(q, 0);
PG_RETURN_FLOAT4((float4)mpq_get_d(q));
}
PGMP_PG_FUNCTION(pmpq_to_float8)
{
const mpq_t q;
PGMP_GETARG_MPQ(q, 0);
PG_RETURN_FLOAT8((float8)mpq_get_d(q));
}
PGMP_PG_FUNCTION(pmpq_to_numeric)
{
const mpq_t q;
int32 typmod;
unsigned long scale;
mpz_t z;
char *buf;
int sbuf, snum;
PGMP_GETARG_MPQ(q, 0);
typmod = PG_GETARG_INT32(1);
/* Parse precision and scale from the type modifier */
if (typmod >= VARHDRSZ) {
scale = (typmod - VARHDRSZ) & 0xffff;
}
else {
scale = 15;
}
if (scale) {
/* Convert q into a scaled z */
char *cmult;
mpz_t mult;
/* create 10000... with as many 0s as the scale */
cmult = (char *)palloc(scale + 2);
memset(cmult + 1, '0', scale);
cmult[0] = '1';
cmult[scale + 1] = '\0';
mpz_init_set_str(mult, cmult, 10);
pfree(cmult);
mpz_init(z);
mpz_mul(z, mpq_numref(q), mult);
sbuf = mpz_sizeinbase(z, 10); /* size of the output buffer */
mpz_tdiv_q(z, z, mpq_denref(q));
snum = mpz_sizeinbase(z, 10); /* size of the number */
}
else {
/* Just truncate q into an integer */
mpz_init(z);
mpz_set_q(z, q);
sbuf = snum = mpz_sizeinbase(z, 10);
}
/* If the numer is 0, everything is a special case: bail out */
if (mpz_cmp_si(z, 0) == 0) {
return DirectFunctionCall3(numeric_in,
CStringGetDatum("0"),
ObjectIdGetDatum(0), /* unused 2nd value */
Int32GetDatum(typmod));
}
/* convert z into a string */
buf = palloc(sbuf + 3); /* add sign, point and null */
mpz_get_str(buf, 10, z);
if (scale) {
char *end, *p;
/* Left pad with 0s the number if smaller than the buffer */
if (snum < sbuf) {
char *num0 = buf + (buf[0] == '-'); /* start of the num w/o sign */
memmove(num0 + (sbuf - snum), num0, snum + 1);
memset(num0, '0', sbuf - snum);
}
end = buf + strlen(buf);
/* Add the decimal point in the right place */
memmove(end - scale + 1, end - scale, scale + 1);
end[-scale] = '.';
/* delete trailing 0s or they will be used to add extra precision */
if (typmod < VARHDRSZ) { /* scale was not specified */
for (p = end; p > (end - scale) && *p == '0'; --p) {
*p = '\0';
}
/* Don't leave a traliling point */
if (*p == '.') {
*p = '\0';
}
}
}
/* use numeric_in to build the value from the string and to apply the
* typemod (which may result in overflow) */
return DirectFunctionCall3(numeric_in,
CStringGetDatum(buf),
ObjectIdGetDatum(0), /* unused 2nd value */
Int32GetDatum(typmod));
}
/*
* Constructor and accessors to num and den
*/
PGMP_PG_FUNCTION(pmpq_mpz_mpz)
{
const mpz_t num;
const mpz_t den;
mpq_t q;
/* We must take a copy of num and den because they may be modified by
* canonicalize */
PGMP_GETARG_MPZ(num, 0);
PGMP_GETARG_MPZ(den, 1);
ERROR_IF_DENOM_ZERO(den);
/* Put together the input and canonicalize */
mpz_init_set(mpq_numref(q), num);
mpz_init_set(mpq_denref(q), den);
mpq_canonicalize(q);
PGMP_RETURN_MPQ(q);
}
PGMP_PG_FUNCTION(pmpq_int4_int4)
{
int32 num = PG_GETARG_INT32(0);
int32 den = PG_GETARG_INT32(1);
mpq_t q;
/* Put together the input and canonicalize */
mpz_init_set_si(mpq_numref(q), (long)num);
mpz_init_set_si(mpq_denref(q), (long)den);
ERROR_IF_DENOM_ZERO(mpq_denref(q));
mpq_canonicalize(q);
PGMP_RETURN_MPQ(q);
}
PGMP_PG_FUNCTION(pmpq_numeric_numeric)
{
char *sn;
char *sd;
mpq_t q;
sn = DatumGetCString(DirectFunctionCall1(numeric_out, PG_GETARG_DATUM(0)));
if (0 != mpz_init_set_str(mpq_numref(q), sn, 10))
{
ereport(ERROR, (
errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("can't handle numeric value at numerator: %s", sn),
errhint("the mpq components should be integers")));
}
sd = DatumGetCString(DirectFunctionCall1(numeric_out, PG_GETARG_DATUM(1)));
if (0 != mpz_init_set_str(mpq_denref(q), sd, 10))
{
ereport(ERROR, (
errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("can't handle numeric value at denominator: %s", sd),
errhint("the mpq components should be integers")));
}
ERROR_IF_DENOM_ZERO(mpq_denref(q));
mpq_canonicalize(q);
PGMP_RETURN_MPQ(q);
}
PGMP_PG_FUNCTION(pmpq_num)
{
const mpq_t q;
mpz_t z;
PGMP_GETARG_MPQ(q, 0);
mpz_init_set(z, mpq_numref(q));
PGMP_RETURN_MPZ(z);
}
PGMP_PG_FUNCTION(pmpq_den)
{
const mpq_t q;
mpz_t z;
PGMP_GETARG_MPQ(q, 0);
mpz_init_set(z, mpq_denref(q));
PGMP_RETURN_MPZ(z);
}
|
8 | ./pgmp/src/pmpz_roots.c | /* pmpz_roots -- root extraction functions
*
* Copyright (C) 2011 Daniele Varrazzo
*
* This file is part of the PostgreSQL GMP Module
*
* The PostgreSQL GMP Module is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* The PostgreSQL GMP Module is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the PostgreSQL GMP Module. If not, see
* http://www.gnu.org/licenses/.
*/
#include "pmpz.h"
#include "pgmp-impl.h"
#include "fmgr.h"
#include "funcapi.h"
#if PG_VERSION_NUM >= 90300
#include <access/htup_details.h> /* for heap_form_tuple */
#endif
/* Functions with a more generic signature are defined in pmpz.arith.c */
#if __GMP_MP_RELEASE >= 40200
PGMP_PG_FUNCTION(pmpz_rootrem)
{
const mpz_t z1;
mpz_t zroot;
mpz_t zrem;
unsigned long n;
PGMP_GETARG_MPZ(z1, 0);
PMPZ_CHECK_NONEG(z1);
PGMP_GETARG_ULONG(n, 1);
PMPZ_CHECK_LONG_POS(n);
mpz_init(zroot);
mpz_init(zrem);
mpz_rootrem (zroot, zrem, z1, n);
PGMP_RETURN_MPZ_MPZ(zroot, zrem);
}
#endif
PGMP_PG_FUNCTION(pmpz_sqrtrem)
{
const mpz_t z1;
mpz_t zroot;
mpz_t zrem;
PGMP_GETARG_MPZ(z1, 0);
mpz_init(zroot);
mpz_init(zrem);
mpz_sqrtrem(zroot, zrem, z1);
PGMP_RETURN_MPZ_MPZ(zroot, zrem);
}
|
9 | ./pgmp/src/pgmp.c | /* pgmp -- PostgreSQL GMP module
*
* Copyright (C) 2011 Daniele Varrazzo
*
* This file is part of the PostgreSQL GMP Module
*
* The PostgreSQL GMP Module is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* The PostgreSQL GMP Module is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the PostgreSQL GMP Module. If not, see
* http://www.gnu.org/licenses/.
*/
#include <gmp.h>
#include "postgres.h"
#include "fmgr.h"
#include "pgmp-impl.h"
PG_MODULE_MAGIC;
void _PG_init(void);
void _PG_fini(void);
static void *_pgmp_alloc(size_t alloc_size);
static void *_pgmp_realloc(void *ptr, size_t old_size, size_t new_size);
static void _pgmp_free(void *ptr, size_t size);
/* A couple of constant limbs used to create constant mp? data
* from the content of varlena data */
const mp_limb_t _pgmp_limb_0 = 0;
const mp_limb_t _pgmp_limb_1 = 1;
/*
* Module initialization and cleanup
*/
void
_PG_init(void)
{
/* A vow to the gods of the memory allocation */
mp_set_memory_functions(
_pgmp_alloc, _pgmp_realloc, _pgmp_free);
}
void
_PG_fini(void)
{
}
/*
* GMP custom allocation functions using PostgreSQL memory management.
*
* In order to store data into the database, the structure must be contiguous
* in memory. GMP instead allocated the limbs dynamically. This means that to
* convert from mpz_p to the varlena a memcpy would be required.
*
* But we don't like memcpy... So we allocate enough space to add the varlena
* header and we return an offsetted pointer to GMP, so that we can always
* scrubble a varlena header in front of the limbs and just ask the database
* to store the result.
*/
static void *
_pgmp_alloc(size_t size)
{
return PGMP_MAX_HDRSIZE + (char *)palloc(size + PGMP_MAX_HDRSIZE);
}
static void *
_pgmp_realloc(void *ptr, size_t old_size, size_t new_size)
{
return PGMP_MAX_HDRSIZE + (char *)repalloc(
(char *)ptr - PGMP_MAX_HDRSIZE,
new_size + PGMP_MAX_HDRSIZE);
}
static void
_pgmp_free(void *ptr, size_t size)
{
pfree((char *)ptr - PGMP_MAX_HDRSIZE);
}
/* Return the version of the library as an integer
*
* Parse the format from the variable gmp_version instead of using the macro
* __GNU_PG_VERSION* in order to detect the runtime version instead of the
* version pgmp was compiled against (although if I'm not entirely sure it is
* working as expected).
*/
PGMP_PG_FUNCTION(pgmp_gmp_version)
{
int maj = 0, min = 0, patch = 0;
const char *p;
/* Parse both A.B.C and A.B formats. */
maj = atoi(gmp_version);
if (NULL == (p = strchr(gmp_version, '.'))) {
goto end;
}
min = atoi(p + 1);
if (NULL == (p = strchr(p + 1, '.'))) {
goto end;
}
patch = atoi(p + 1);
end:
PG_RETURN_INT32(maj * 10000 + min * 100 + patch);
}
|
10 | ./pgmp/src/pmpq_arith.c | /* pmpq_arith -- mpq arithmetic functions
*
* Copyright (C) 2011 Daniele Varrazzo
*
* This file is part of the PostgreSQL GMP Module
*
* The PostgreSQL GMP Module is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* The PostgreSQL GMP Module is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the PostgreSQL GMP Module. If not, see
* http://www.gnu.org/licenses/.
*/
#include "pmpq.h"
#include "pmpz.h"
#include "pgmp-impl.h"
#include "fmgr.h"
#include "access/hash.h" /* for hash_any */
/*
* Unary operators
*/
PGMP_PG_FUNCTION(pmpq_uplus)
{
const pmpq *pq1;
pmpq *res;
pq1 = PGMP_GETARG_PMPQ(0);
res = (pmpq *)palloc(VARSIZE(pq1));
memcpy(res, pq1, VARSIZE(pq1));
PG_RETURN_POINTER(res);
}
#define PMPQ_UN(op, CHECK) \
\
PGMP_PG_FUNCTION(pmpq_ ## op) \
{ \
const mpq_t q; \
mpq_t qf; \
\
PGMP_GETARG_MPQ(q, 0); \
CHECK(q); \
\
mpq_init(qf); \
mpq_ ## op (qf, q); \
\
PGMP_RETURN_MPQ(qf); \
}
PMPQ_UN(neg, PMPQ_NO_CHECK)
PMPQ_UN(abs, PMPQ_NO_CHECK)
PMPQ_UN(inv, PMPQ_CHECK_DIV0)
/*
* Binary operators
*/
/* Template to generate binary operators */
#define PMPQ_OP(op, CHECK2) \
\
PGMP_PG_FUNCTION(pmpq_ ## op) \
{ \
const mpq_t q1; \
const mpq_t q2; \
mpq_t qf; \
\
PGMP_GETARG_MPQ(q1, 0); \
PGMP_GETARG_MPQ(q2, 1); \
CHECK2(q2); \
\
mpq_init(qf); \
mpq_ ## op (qf, q1, q2); \
\
PGMP_RETURN_MPQ(qf); \
}
PMPQ_OP(add, PMPQ_NO_CHECK)
PMPQ_OP(sub, PMPQ_NO_CHECK)
PMPQ_OP(mul, PMPQ_NO_CHECK)
PMPQ_OP(div, PMPQ_CHECK_DIV0)
/* Functions defined on bit count */
#define PMPQ_BIT(op) \
\
PGMP_PG_FUNCTION(pmpq_ ## op) \
{ \
const mpq_t q; \
unsigned long b; \
mpq_t qf; \
\
PGMP_GETARG_MPQ(q, 0); \
PGMP_GETARG_ULONG(b, 1); \
\
mpq_init(qf); \
mpq_ ## op (qf, q, b); \
\
PGMP_RETURN_MPQ(qf); \
}
PMPQ_BIT(mul_2exp)
PMPQ_BIT(div_2exp)
/*
* Comparison operators
*/
PGMP_PG_FUNCTION(pmpq_cmp)
{
const mpq_t q1;
const mpq_t q2;
PGMP_GETARG_MPQ(q1, 0);
PGMP_GETARG_MPQ(q2, 1);
PG_RETURN_INT32(mpq_cmp(q1, q2));
}
#define PMPQ_CMP_EQ(op, rel) \
\
PGMP_PG_FUNCTION(pmpq_ ## op) \
{ \
const mpq_t q1; \
const mpq_t q2; \
\
PGMP_GETARG_MPQ(q1, 0); \
PGMP_GETARG_MPQ(q2, 1); \
\
PG_RETURN_BOOL(mpq_equal(q1, q2) rel 0); \
}
PMPQ_CMP_EQ(eq, !=) /* note that the operators are reversed */
PMPQ_CMP_EQ(ne, ==)
#define PMPQ_CMP(op, rel) \
\
PGMP_PG_FUNCTION(pmpq_ ## op) \
{ \
const mpq_t q1; \
const mpq_t q2; \
\
PGMP_GETARG_MPQ(q1, 0); \
PGMP_GETARG_MPQ(q2, 1); \
\
PG_RETURN_BOOL(mpq_cmp(q1, q2) rel 0); \
}
PMPQ_CMP(gt, >)
PMPQ_CMP(ge, >=)
PMPQ_CMP(lt, <)
PMPQ_CMP(le, <=)
/* The hash of an integer mpq is the same of the same number as mpz.
* This allows cross-type hash joins with mpz and builtins.
*/
PGMP_PG_FUNCTION(pmpq_hash)
{
const mpq_t q;
Datum nhash;
PGMP_GETARG_MPQ(q, 0);
nhash = pmpz_get_hash(mpq_numref(q));
if (mpz_cmp_si(mpq_denref(q), 1L) == 0) {
return nhash;
}
PG_RETURN_INT32(
DatumGetInt32(nhash) ^ hash_any(
(unsigned char *)LIMBS(mpq_denref(q)),
NLIMBS(mpq_denref(q)) * sizeof(mp_limb_t)));
}
/* limit_den */
static void limit_den(mpq_ptr q_out, mpq_srcptr q_in, mpz_srcptr max_den);
PGMP_PG_FUNCTION(pmpq_limit_den)
{
const mpq_t q_in;
const mpz_t max_den;
mpq_t q_out;
PGMP_GETARG_MPQ(q_in, 0);
if (PG_NARGS() >= 2) {
PGMP_GETARG_MPZ(max_den, 1);
}
else {
mpz_init_set_si((mpz_ptr)max_den, 1000000);
}
if (mpz_cmp_si(max_den, 1) < 0)
{
ereport(ERROR, ( \
errcode(ERRCODE_INVALID_PARAMETER_VALUE), \
errmsg("max_den should be at least 1"))); \
}
mpq_init(q_out);
limit_den(q_out, q_in, max_den);
PGMP_RETURN_MPQ(q_out);
}
/*
* Set q_out to the closest fraction to q_in with denominator at most max_den
*
* Ported from Python library: see
* http://hg.python.org/cpython/file/v2.7/Lib/fractions.py#l206
* for implementation notes.
*/
static void
limit_den(mpq_ptr q_out, mpq_srcptr q_in, mpz_srcptr max_den)
{
mpz_t p0, q0, p1, q1;
mpz_t n, d;
mpz_t a, q2;
mpz_t k;
mpq_t b1, b2;
mpq_t ab1, ab2;
if (mpz_cmp(mpq_denref(q_in), max_den) <= 0) {
mpq_set(q_out, q_in);
return;
}
/* p0, q0, p1, q1 = 0, 1, 1, 0 */
mpz_init_set_si(p0, 0);
mpz_init_set_si(q0, 1);
mpz_init_set_si(p1, 1);
mpz_init_set_si(q1, 0);
/* n, d = self._numerator, self._denominator */
mpz_init_set(n, mpq_numref(q_in));
mpz_init_set(d, mpq_denref(q_in));
mpz_init(a);
mpz_init(q2);
for (;;) {
/* a = n // d */
mpz_tdiv_q(a, n, d);
/* q2 = q0+a*q1 */
mpz_set(q2, q0);
mpz_addmul(q2, a, q1);
if (mpz_cmp(q2, max_den) > 0) { break; }
/* p0, q0, p1, q1 = p1, q1, p0+a*p1, q2 */
mpz_swap(p0, p1);
mpz_addmul(p1, a, p0);
mpz_swap(q0, q1);
mpz_swap(q1, q2);
/* n, d = d, n-a*d */
mpz_swap(n, d);
mpz_submul(d, a, n);
}
/* k = (max_denominator - q0) // q1 */
mpz_init(k);
mpz_sub(k, max_den, q0);
mpz_tdiv_q(k, k, q1);
/* bound1 = Fraction(p0+k*p1, q0+k*q1) */
mpq_init(b1);
mpz_addmul(p0, k, p1);
mpz_set(mpq_numref(b1), p0);
mpz_addmul(q0, k, q1);
mpz_set(mpq_denref(b1), q0);
mpq_canonicalize(b1);
/* bound2 = Fraction(p1, q1) */
mpq_init(b2);
mpz_set(mpq_numref(b2), p1);
mpz_set(mpq_denref(b2), q1);
mpq_canonicalize(b2);
/* if abs(bound2 - self) <= abs(bound1 - self): */
mpq_init(ab1);
mpq_sub(ab1, b1, q_in);
mpq_abs(ab1, ab1);
mpq_init(ab2);
mpq_sub(ab2, b2, q_in);
mpq_abs(ab2, ab2);
if (mpq_cmp(ab2, ab1) <= 0) {
/* return bound2 */
mpq_set(q_out, b2);
}
else {
/* return bound1 */
mpq_set(q_out, b1);
}
}
|
11 | ./pgmp/src/pmpz_rand.c | /* pmpz_rand -- mpz random numbers
*
* Copyright (C) 2011 Daniele Varrazzo
*
* This file is part of the PostgreSQL GMP Module
*
* The PostgreSQL GMP Module is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* The PostgreSQL GMP Module is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the PostgreSQL GMP Module. If not, see
* http://www.gnu.org/licenses/.
*/
#include "pmpz.h"
#include "pgmp-impl.h"
#include "fmgr.h"
#include "utils/memutils.h" /* for TopMemoryContext */
/* The state of the random number generator.
*
* Currently this variable is reset when the library is loaded: this means at
* every session but would break if the library starts being preloaded. So,
* TODO: check if there is a way to explicitly allocate this structure per
* session.
*/
gmp_randstate_t *pgmp_randstate;
/* Clear the random state if set
*
* This macro should be invoked with the TopMemoryContext set as current
* memory context
*/
#define PGMP_CLEAR_RANDSTATE \
do { \
if (pgmp_randstate) { \
gmp_randclear(*pgmp_randstate); \
pfree(pgmp_randstate); \
pgmp_randstate = NULL; \
} \
} while (0)
/* Exit with an error if the random state is not set */
#define PGMP_CHECK_RANDSTATE \
do { \
if (!pgmp_randstate) { \
ereport(ERROR, ( \
errcode(ERRCODE_INVALID_PARAMETER_VALUE), \
errmsg("random state not initialized") )); \
} \
} while (0)
/*
* Random state initialization
*/
#define PGMP_RANDINIT(f, INIT) \
\
PGMP_PG_FUNCTION(pgmp_ ## f) \
{ \
gmp_randstate_t *state; \
MemoryContext oldctx; \
\
/* palloc and init of the global variable should happen */ \
/* in the global memory context. */ \
oldctx = MemoryContextSwitchTo(TopMemoryContext); \
\
state = palloc(sizeof(gmp_randstate_t)); \
INIT(f); \
\
/* set the global variable to the initialized state */ \
PGMP_CLEAR_RANDSTATE; \
pgmp_randstate = state; \
\
MemoryContextSwitchTo(oldctx); \
\
PG_RETURN_NULL(); \
}
#define PGMP_RANDINIT_NOARG(f) gmp_ ## f (*state)
PGMP_RANDINIT(randinit_default, PGMP_RANDINIT_NOARG)
#if __GMP_MP_RELEASE >= 40200
PGMP_RANDINIT(randinit_mt, PGMP_RANDINIT_NOARG)
#endif
#define PGMP_RANDINIT_ACE(f) \
do { \
const mpz_t a; \
unsigned long c; \
mp_bitcnt_t e; \
\
PGMP_GETARG_MPZ(a, 0); \
PGMP_GETARG_ULONG(c, 1); \
PGMP_GETARG_ULONG(e, 2); \
\
gmp_ ## f (*state, a, c, e); \
} while (0)
PGMP_RANDINIT(randinit_lc_2exp, PGMP_RANDINIT_ACE)
#define PGMP_RANDINIT_SIZE(f) \
do { \
mp_bitcnt_t size; \
\
PGMP_GETARG_ULONG(size, 0); \
\
if (!gmp_ ## f (*state, size)) { \
ereport(ERROR, ( \
errcode(ERRCODE_INVALID_PARAMETER_VALUE), \
errmsg("failed to initialized random state with size %lu", \
size) )); \
} \
} while (0)
PGMP_RANDINIT(randinit_lc_2exp_size, PGMP_RANDINIT_SIZE)
PGMP_PG_FUNCTION(pgmp_randseed)
{
const mpz_t seed;
MemoryContext oldctx;
PGMP_CHECK_RANDSTATE;
PGMP_GETARG_MPZ(seed, 0);
/* Switch to the global memory cx in case gmp_randseed allocates */
oldctx = MemoryContextSwitchTo(TopMemoryContext);
gmp_randseed(*pgmp_randstate, seed);
MemoryContextSwitchTo(oldctx);
PG_RETURN_NULL();
}
/*
* Random numbers functions
*/
#define PMPZ_RAND_BITCNT(f) \
\
PGMP_PG_FUNCTION(pmpz_ ## f) \
{ \
unsigned long n; \
mpz_t ret; \
\
PGMP_CHECK_RANDSTATE; \
\
PGMP_GETARG_ULONG(n, 0); \
\
mpz_init(ret); \
mpz_ ## f (ret, *pgmp_randstate, n); \
\
PGMP_RETURN_MPZ(ret); \
}
PMPZ_RAND_BITCNT(urandomb)
PMPZ_RAND_BITCNT(rrandomb)
PGMP_PG_FUNCTION(pmpz_urandomm)
{
const mpz_t n;
mpz_t ret;
PGMP_CHECK_RANDSTATE;
PGMP_GETARG_MPZ(n, 0);
mpz_init(ret);
mpz_urandomm(ret, *pgmp_randstate, n);
PGMP_RETURN_MPZ(ret);
}
|
12 | ./pgmp/src/pmpz_arith.c | /* pmpz_arith -- mpz arithmetic functions
*
* Copyright (C) 2011 Daniele Varrazzo
*
* This file is part of the PostgreSQL GMP Module
*
* The PostgreSQL GMP Module is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* The PostgreSQL GMP Module is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the PostgreSQL GMP Module. If not, see
* http://www.gnu.org/licenses/.
*/
#include "pmpz.h"
#include "pgmp-impl.h"
#include "fmgr.h"
#include "funcapi.h"
#include "access/hash.h" /* for hash_any */
#if PG_VERSION_NUM >= 90300
#include <access/htup_details.h> /* for heap_form_tuple */
#endif
/*
* Unary operators
*/
PGMP_PG_FUNCTION(pmpz_uplus)
{
const pmpz *pz1;
pmpz *res;
pz1 = PGMP_GETARG_PMPZ(0);
res = (pmpz *)palloc(VARSIZE(pz1));
memcpy(res, pz1, VARSIZE(pz1));
PG_RETURN_POINTER(res);
}
/* Template to generate unary functions */
#define PMPZ_UN(op, CHECK) \
\
PGMP_PG_FUNCTION(pmpz_ ## op) \
{ \
const mpz_t z1; \
mpz_t zf; \
\
PGMP_GETARG_MPZ(z1, 0); \
CHECK(z1); \
\
mpz_init(zf); \
mpz_ ## op (zf, z1); \
\
PGMP_RETURN_MPZ(zf); \
}
PMPZ_UN(neg, PMPZ_NO_CHECK)
PMPZ_UN(abs, PMPZ_NO_CHECK)
PMPZ_UN(sqrt, PMPZ_CHECK_NONEG)
PMPZ_UN(com, PMPZ_NO_CHECK)
/*
* Binary operators
*/
/* Operators defined (mpz, mpz) -> mpz.
*
* CHECK2 is a check performed on the 2nd argument.
*/
#define PMPZ_OP(op, CHECK2) \
\
PGMP_PG_FUNCTION(pmpz_ ## op) \
{ \
const mpz_t z1; \
const mpz_t z2; \
mpz_t zf; \
\
PGMP_GETARG_MPZ(z1, 0); \
PGMP_GETARG_MPZ(z2, 1); \
CHECK2(z2); \
\
mpz_init(zf); \
mpz_ ## op (zf, z1, z2); \
\
PGMP_RETURN_MPZ(zf); \
}
PMPZ_OP(add, PMPZ_NO_CHECK)
PMPZ_OP(sub, PMPZ_NO_CHECK)
PMPZ_OP(mul, PMPZ_NO_CHECK)
PMPZ_OP(tdiv_q, PMPZ_CHECK_DIV0)
PMPZ_OP(tdiv_r, PMPZ_CHECK_DIV0)
PMPZ_OP(cdiv_q, PMPZ_CHECK_DIV0)
PMPZ_OP(cdiv_r, PMPZ_CHECK_DIV0)
PMPZ_OP(fdiv_q, PMPZ_CHECK_DIV0)
PMPZ_OP(fdiv_r, PMPZ_CHECK_DIV0)
PMPZ_OP(divexact, PMPZ_CHECK_DIV0)
PMPZ_OP(and, PMPZ_NO_CHECK)
PMPZ_OP(ior, PMPZ_NO_CHECK)
PMPZ_OP(xor, PMPZ_NO_CHECK)
PMPZ_OP(gcd, PMPZ_NO_CHECK)
PMPZ_OP(lcm, PMPZ_NO_CHECK)
PMPZ_OP(remove, PMPZ_NO_CHECK) /* TODO: return value not returned */
/* Operators defined (mpz, mpz) -> (mpz, mpz). */
#define PMPZ_OP2(op, CHECK2) \
\
PGMP_PG_FUNCTION(pmpz_ ## op) \
{ \
const mpz_t z1; \
const mpz_t z2; \
mpz_t zf1; \
mpz_t zf2; \
\
PGMP_GETARG_MPZ(z1, 0); \
PGMP_GETARG_MPZ(z2, 1); \
CHECK2(z2); \
\
mpz_init(zf1); \
mpz_init(zf2); \
mpz_ ## op (zf1, zf2, z1, z2); \
\
PGMP_RETURN_MPZ_MPZ(zf1, zf2); \
}
PMPZ_OP2(tdiv_qr, PMPZ_CHECK_DIV0)
PMPZ_OP2(cdiv_qr, PMPZ_CHECK_DIV0)
PMPZ_OP2(fdiv_qr, PMPZ_CHECK_DIV0)
/* Functions defined on unsigned long */
#define PMPZ_OP_UL(op, CHECK1, CHECK2) \
\
PGMP_PG_FUNCTION(pmpz_ ## op) \
{ \
const mpz_t z; \
unsigned long b; \
mpz_t zf; \
\
PGMP_GETARG_MPZ(z, 0); \
CHECK1(z); \
\
PGMP_GETARG_ULONG(b, 1); \
CHECK2(b); \
\
mpz_init(zf); \
mpz_ ## op (zf, z, b); \
\
PGMP_RETURN_MPZ(zf); \
}
PMPZ_OP_UL(pow_ui, PMPZ_NO_CHECK, PMPZ_NO_CHECK)
PMPZ_OP_UL(root, PMPZ_CHECK_NONEG, PMPZ_CHECK_LONG_POS)
PMPZ_OP_UL(bin_ui, PMPZ_NO_CHECK, PMPZ_CHECK_LONG_NONEG)
/* Functions defined on bit count
*
* mp_bitcnt_t is defined as unsigned long.
*/
#define PMPZ_OP_BITCNT PMPZ_OP_UL
PMPZ_OP_BITCNT(mul_2exp, PMPZ_NO_CHECK, PMPZ_NO_CHECK)
PMPZ_OP_BITCNT(tdiv_q_2exp, PMPZ_NO_CHECK, PMPZ_NO_CHECK)
PMPZ_OP_BITCNT(tdiv_r_2exp, PMPZ_NO_CHECK, PMPZ_NO_CHECK)
PMPZ_OP_BITCNT(cdiv_q_2exp, PMPZ_NO_CHECK, PMPZ_NO_CHECK)
PMPZ_OP_BITCNT(cdiv_r_2exp, PMPZ_NO_CHECK, PMPZ_NO_CHECK)
PMPZ_OP_BITCNT(fdiv_q_2exp, PMPZ_NO_CHECK, PMPZ_NO_CHECK)
PMPZ_OP_BITCNT(fdiv_r_2exp, PMPZ_NO_CHECK, PMPZ_NO_CHECK)
/* Unary predicates */
#define PMPZ_PRED(pred) \
\
PGMP_PG_FUNCTION(pmpz_ ## pred) \
{ \
const mpz_t op; \
\
PGMP_GETARG_MPZ(op, 0); \
\
PG_RETURN_BOOL(mpz_ ## pred ## _p(op)); \
}
PMPZ_PRED(even)
PMPZ_PRED(odd)
PMPZ_PRED(perfect_power)
PMPZ_PRED(perfect_square)
/*
* Comparison operators
*/
PGMP_PG_FUNCTION(pmpz_cmp)
{
const mpz_t z1;
const mpz_t z2;
PGMP_GETARG_MPZ(z1, 0);
PGMP_GETARG_MPZ(z2, 1);
PG_RETURN_INT32(mpz_cmp(z1, z2));
}
#define PMPZ_CMP(op, rel) \
\
PGMP_PG_FUNCTION(pmpz_ ## op) \
{ \
const mpz_t z1; \
const mpz_t z2; \
\
PGMP_GETARG_MPZ(z1, 0); \
PGMP_GETARG_MPZ(z2, 1); \
\
PG_RETURN_BOOL(mpz_cmp(z1, z2) rel 0); \
}
PMPZ_CMP(eq, ==)
PMPZ_CMP(ne, !=)
PMPZ_CMP(gt, >)
PMPZ_CMP(ge, >=)
PMPZ_CMP(lt, <)
PMPZ_CMP(le, <=)
/* The hash of an mpz fitting into a int64 is the same of the PG builtin.
* This allows cross-type hash joins int2/int4/int8.
*/
PGMP_PG_FUNCTION(pmpz_hash)
{
const mpz_t z;
PGMP_GETARG_MPZ(z, 0);
return pmpz_get_hash(z);
}
Datum
pmpz_get_hash(mpz_srcptr z)
{
int64 z64;
if (0 == pmpz_get_int64(z, &z64)) {
return DirectFunctionCall1(hashint8, Int64GetDatumFast(z64));
}
PG_RETURN_INT32(hash_any(
(unsigned char *)LIMBS(z),
NLIMBS(z) * sizeof(mp_limb_t)));
}
/*
* Misc functions... each one has its own signature, sigh.
*/
PGMP_PG_FUNCTION(pmpz_sgn)
{
const mpz_t n;
PGMP_GETARG_MPZ(n, 0);
PG_RETURN_INT32(mpz_sgn(n));
}
PGMP_PG_FUNCTION(pmpz_divisible)
{
const mpz_t n;
const mpz_t d;
PGMP_GETARG_MPZ(n, 0);
PGMP_GETARG_MPZ(d, 1);
/* GMP 4.1 doesn't guard for zero */
#if __GMP_MP_RELEASE < 40200
if (UNLIKELY(MPZ_IS_ZERO(d))) {
PG_RETURN_BOOL(MPZ_IS_ZERO(n));
}
#endif
PG_RETURN_BOOL(mpz_divisible_p(n, d));
}
PGMP_PG_FUNCTION(pmpz_divisible_2exp)
{
const mpz_t n;
mp_bitcnt_t b;
PGMP_GETARG_MPZ(n, 0);
PGMP_GETARG_ULONG(b, 1);
PG_RETURN_BOOL(mpz_divisible_2exp_p(n, b));
}
PGMP_PG_FUNCTION(pmpz_congruent)
{
const mpz_t n;
const mpz_t c;
const mpz_t d;
PGMP_GETARG_MPZ(n, 0);
PGMP_GETARG_MPZ(c, 1);
PGMP_GETARG_MPZ(d, 2);
/* GMP 4.1 doesn't guard for zero */
#if __GMP_MP_RELEASE < 40200
if (UNLIKELY(MPZ_IS_ZERO(d))) {
PG_RETURN_BOOL(0 == mpz_cmp(n, c));
}
#endif
PG_RETURN_BOOL(mpz_congruent_p(n, c, d));
}
PGMP_PG_FUNCTION(pmpz_congruent_2exp)
{
const mpz_t n;
const mpz_t c;
mp_bitcnt_t b;
PGMP_GETARG_MPZ(n, 0);
PGMP_GETARG_MPZ(c, 1);
PGMP_GETARG_ULONG(b, 2);
PG_RETURN_BOOL(mpz_congruent_2exp_p(n, c, b));
}
PGMP_PG_FUNCTION(pmpz_powm)
{
const mpz_t base;
const mpz_t exp;
const mpz_t mod;
mpz_t zf;
PGMP_GETARG_MPZ(base, 0);
PGMP_GETARG_MPZ(exp, 1);
PMPZ_CHECK_NONEG(exp);
PGMP_GETARG_MPZ(mod, 2);
PMPZ_CHECK_DIV0(mod);
mpz_init(zf);
mpz_powm(zf, base, exp, mod);
PGMP_RETURN_MPZ(zf);
}
|
13 | ./pgmp/src/pmpz.c | /* pmpz -- PostgreSQL data type for GMP mpz
*
* Copyright (C) 2011 Daniele Varrazzo
*
* This file is part of the PostgreSQL GMP Module
*
* The PostgreSQL GMP Module is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* The PostgreSQL GMP Module is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the PostgreSQL GMP Module. If not, see
* http://www.gnu.org/licenses/.
*/
#include "pmpz.h"
#include "pgmp-impl.h"
#include "fmgr.h"
/* To be referred to to represent the zero */
extern const mp_limb_t _pgmp_limb_0;
/*
* Create a pmpz structure from the content of a mpz.
*
* The function relies on the limbs being allocated using the GMP custom
* allocator: such allocator leaves PGMP_MAX_HDRSIZE bytes *before* the
* returned pointer. We scrubble that area prepending the pmpz header.
*/
pmpz *
pmpz_from_mpz(mpz_srcptr z)
{
pmpz *res;
int size = SIZ(z);
res = (pmpz *)((char *)LIMBS(z) - PMPZ_HDRSIZE);
if (LIKELY(0 != size))
{
size_t slimbs;
int sign;
if (size > 0) {
slimbs = size * sizeof(mp_limb_t);
sign = 0;
}
else {
slimbs = -size * sizeof(mp_limb_t);
sign = PMPZ_SIGN_MASK;
}
SET_VARSIZE(res, PMPZ_HDRSIZE + slimbs);
res->mdata = sign; /* implicit version: 0 */
}
else
{
/* In the zero representation there are no limbs */
SET_VARSIZE(res, PMPZ_HDRSIZE);
res->mdata = 0; /* version: 0 */
}
return res;
}
/*
* Initialize a mpz from the content of a datum
*
* NOTE: the function takes a pointer to a const and changes the structure.
* This allows to define the structure as const in the calling function and
* avoid the risk to change it inplace, which may corrupt the database data.
*
* The structure populated doesn't own the pointed data, so it must not be
* changed in any way and must not be cleared.
*/
void
mpz_from_pmpz(mpz_srcptr z, const pmpz *pz)
{
int nlimbs;
mpz_ptr wz;
if (UNLIKELY(0 != (PMPZ_VERSION(pz)))) {
ereport(ERROR, (
errcode(ERRCODE_DATA_EXCEPTION),
errmsg("unsupported mpz version: %d", PMPZ_VERSION(pz))));
}
/* discard the const qualifier */
wz = (mpz_ptr)z;
nlimbs = (VARSIZE(pz) - PMPZ_HDRSIZE) / sizeof(mp_limb_t);
if (LIKELY(nlimbs != 0))
{
ALLOC(wz) = nlimbs;
SIZ(wz) = PMPZ_NEGATIVE(pz) ? -nlimbs : nlimbs;
LIMBS(wz) = (mp_limb_t *)pz->data;
}
else
{
/* in the datum there is just the varlena header
* so let's just refer to some static const */
ALLOC(wz) = 1;
SIZ(wz) = 0;
LIMBS(wz) = (mp_limb_t *)&_pgmp_limb_0;
}
}
|
14 | ./pgmp/src/pmpz_theor.c | /* pmpz_theor -- number theoretic functions
*
* Copyright (C) 2011 Daniele Varrazzo
*
* This file is part of the PostgreSQL GMP Module
*
* The PostgreSQL GMP Module is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* The PostgreSQL GMP Module is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the PostgreSQL GMP Module. If not, see
* http://www.gnu.org/licenses/.
*/
#include "pmpz.h"
#include "pgmp-impl.h"
#include "fmgr.h"
#include "funcapi.h"
#if PG_VERSION_NUM >= 90300
#include <access/htup_details.h> /* for heap_form_tuple */
#endif
/* Function with a more generic signature are defined in pmpz.arith.c */
PGMP_PG_FUNCTION(pmpz_probab_prime_p)
{
const mpz_t z1;
int reps;
PGMP_GETARG_MPZ(z1, 0);
reps = PG_GETARG_INT32(1);
PG_RETURN_INT32(mpz_probab_prime_p(z1, reps));
}
PGMP_PG_FUNCTION(pmpz_nextprime)
{
const mpz_t z1;
mpz_t zf;
PGMP_GETARG_MPZ(z1, 0);
mpz_init(zf);
#if __GMP_MP_RELEASE < 40300
if (UNLIKELY(mpz_sgn(z1) < 0)) {
mpz_set_ui(zf, 2);
}
else
#endif
{
mpz_nextprime(zf, z1);
}
PGMP_RETURN_MPZ(zf);
}
PGMP_PG_FUNCTION(pmpz_gcdext)
{
const mpz_t z1;
const mpz_t z2;
mpz_t zf;
mpz_t zs;
mpz_t zt;
PGMP_GETARG_MPZ(z1, 0);
PGMP_GETARG_MPZ(z2, 1);
mpz_init(zf);
mpz_init(zs);
mpz_init(zt);
mpz_gcdext(zf, zs, zt, z1, z2);
PGMP_RETURN_MPZ_MPZ_MPZ(zf, zs, zt);
}
PGMP_PG_FUNCTION(pmpz_invert)
{
const mpz_t z1;
const mpz_t z2;
mpz_t zf;
int ret;
PGMP_GETARG_MPZ(z1, 0);
PGMP_GETARG_MPZ(z2, 1);
mpz_init(zf);
ret = mpz_invert(zf, z1, z2);
if (ret != 0) {
PGMP_RETURN_MPZ(zf);
}
else {
PG_RETURN_NULL();
}
}
#define PMPZ_INT32(f) \
\
PGMP_PG_FUNCTION(pmpz_ ## f) \
{ \
const mpz_t z1; \
const mpz_t z2; \
\
PGMP_GETARG_MPZ(z1, 0); \
PGMP_GETARG_MPZ(z2, 1); \
\
PG_RETURN_INT32(mpz_ ## f (z1, z2)); \
}
PMPZ_INT32(jacobi)
PMPZ_INT32(legendre)
PMPZ_INT32(kronecker)
#define PMPZ_ULONG(f) \
\
PGMP_PG_FUNCTION(pmpz_ ## f) \
{ \
unsigned long op; \
mpz_t ret; \
\
PGMP_GETARG_ULONG(op, 0); \
\
mpz_init(ret); \
mpz_ ## f (ret, op); \
\
PGMP_RETURN_MPZ(ret); \
}
PMPZ_ULONG(fac_ui)
PMPZ_ULONG(fib_ui)
PMPZ_ULONG(lucnum_ui)
#define PMPZ_ULONG_MPZ2(f) \
\
PGMP_PG_FUNCTION(pmpz_ ## f) \
{ \
unsigned long op; \
mpz_t ret1; \
mpz_t ret2; \
\
PGMP_GETARG_ULONG(op, 0); \
\
mpz_init(ret1); \
mpz_init(ret2); \
mpz_ ## f (ret1, ret2, op); \
\
PGMP_RETURN_MPZ_MPZ(ret1, ret2); \
}
PMPZ_ULONG_MPZ2(fib2_ui)
PMPZ_ULONG_MPZ2(lucnum2_ui)
|
15 | ./pgmp/src/pmpz_io.c | /* pmpz_io -- mpz Input/Output functions
*
* Copyright (C) 2011 Daniele Varrazzo
*
* This file is part of the PostgreSQL GMP Module
*
* The PostgreSQL GMP Module is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* The PostgreSQL GMP Module is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the PostgreSQL GMP Module. If not, see
* http://www.gnu.org/licenses/.
*/
#include "pmpz.h"
#include "pgmp-impl.h"
#include "fmgr.h"
#include "utils/builtins.h" /* for numeric_out */
#include <math.h> /* for isinf, isnan */
/*
* Input/Output functions
*/
PGMP_PG_FUNCTION(pmpz_in)
{
char *str;
mpz_t z;
str = PG_GETARG_CSTRING(0);
if (0 != mpz_init_set_str(z, str, 0))
{
const char *ell;
const int maxchars = 50;
ell = (strlen(str) > maxchars) ? "..." : "";
ereport(ERROR, (
errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("invalid input for mpz: \"%.*s%s\"",
maxchars, str, ell)));
}
PGMP_RETURN_MPZ(z);
}
PGMP_PG_FUNCTION(pmpz_in_base)
{
int base;
char *str;
mpz_t z;
base = PG_GETARG_INT32(1);
if (!(base == 0 || (2 <= base && base <= PGMP_MAXBASE_IO)))
{
ereport(ERROR, (
errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("invalid base for mpz input: %d", base),
errhint("base should be between 2 and %d", PGMP_MAXBASE_IO)));
}
str = TextDatumGetCString(PG_GETARG_POINTER(0));
if (0 != mpz_init_set_str(z, str, base))
{
const char *ell;
const int maxchars = 50;
ell = (strlen(str) > maxchars) ? "..." : "";
ereport(ERROR, (
errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("invalid input for mpz base %d: \"%.*s%s\"",
base, 50, str, ell)));
}
PGMP_RETURN_MPZ(z);
}
PGMP_PG_FUNCTION(pmpz_out)
{
const mpz_t z;
char *buf;
PGMP_GETARG_MPZ(z, 0);
/* We must allocate the output buffer ourselves because the buffer
* returned by mpz_get_str actually starts a few bytes before (because of
* the custom GMP allocator); Postgres will try to free the pointer we
* return in printtup() so with the offsetted pointer a segfault is
* granted. */
buf = palloc(mpz_sizeinbase(z, 10) + 2); /* add sign and null */
PG_RETURN_CSTRING(mpz_get_str(buf, 10, z));
}
PGMP_PG_FUNCTION(pmpz_out_base)
{
const mpz_t z;
int base;
char *buf;
PGMP_GETARG_MPZ(z, 0);
base = PG_GETARG_INT32(1);
if (!((-36 <= base && base <= -2) ||
(2 <= base && base <= PGMP_MAXBASE_IO)))
{
ereport(ERROR, (
errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("invalid base for mpz output: %d", base),
errhint("base should be between -36 and -2 or between 2 and %d",
PGMP_MAXBASE_IO)));
}
/* Allocate the output buffer manually - see mpmz_out to know why */
buf = palloc(mpz_sizeinbase(z, ABS(base)) + 2); /* add sign and null */
PG_RETURN_CSTRING(mpz_get_str(buf, base, z));
}
/*
* Cast functions
*/
static Datum _pmpz_from_long(long in);
static Datum _pmpz_from_double(double in);
PGMP_PG_FUNCTION(pmpz_from_int2)
{
int16 in = PG_GETARG_INT16(0);
return _pmpz_from_long(in);
}
PGMP_PG_FUNCTION(pmpz_from_int4)
{
int32 in = PG_GETARG_INT32(0);
return _pmpz_from_long(in);
}
PGMP_PG_FUNCTION(pmpz_from_int8)
{
int64 in = PG_GETARG_INT64(0);
#if PGMP_LONG_64
return _pmpz_from_long(in);
#elif PGMP_LONG_32
int neg = 0;
uint32 lo;
uint32 hi;
mpz_t z;
if (LIKELY(in != INT64_MIN))
{
if (in < 0) {
neg = 1;
in = -in;
}
lo = in & 0xFFFFFFFFUL;
hi = in >> 32;
if (hi) {
mpz_init_set_ui(z, hi);
mpz_mul_2exp(z, z, 32);
mpz_add_ui(z, z, lo);
}
else {
mpz_init_set_ui(z, lo);
}
if (neg) {
mpz_neg(z, z);
}
}
else {
/* this would overflow the long */
mpz_init_set_si(z, 1L);
mpz_mul_2exp(z, z, 63);
mpz_neg(z, z);
}
PGMP_RETURN_MPZ(z);
#endif
}
static Datum
_pmpz_from_long(long in)
{
mpz_t z;
mpz_init_set_si(z, in);
PGMP_RETURN_MPZ(z);
}
PGMP_PG_FUNCTION(pmpz_from_float4)
{
float4 in = PG_GETARG_FLOAT4(0);
return _pmpz_from_double(in);
}
PGMP_PG_FUNCTION(pmpz_from_float8)
{
float8 in = PG_GETARG_FLOAT8(0);
return _pmpz_from_double(in);
}
static Datum
_pmpz_from_double(double in)
{
mpz_t z;
if (isinf(in) || isnan(in)) {
ereport(ERROR, (
errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("can't convert float value to mpz: \"%f\"", in)));
}
mpz_init_set_d(z, in);
PGMP_RETURN_MPZ(z);
}
PGMP_PG_FUNCTION(pmpz_from_numeric)
{
char *str;
char *p;
mpz_t z;
/* convert the numeric into string. */
str = DatumGetCString(DirectFunctionCall1(numeric_out,
PG_GETARG_DATUM(0)));
/* truncate the string if it contains a decimal dot */
if ((p = strchr(str, '.'))) { *p = '\0'; }
if (0 != mpz_init_set_str(z, str, 10))
{
/* here str may have been cropped, but I expect this error
* only triggered by NaN, so not in case of regular number */
ereport(ERROR, (
errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("can't convert numeric value to mpz: \"%s\"", str)));
}
PGMP_RETURN_MPZ(z);
}
PGMP_PG_FUNCTION(pmpz_to_int2)
{
const mpz_t z;
int16 out;
PGMP_GETARG_MPZ(z, 0);
if (!mpz_fits_sshort_p(z)) {
ereport(ERROR, (
errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("numeric value too big to be converted to int2 data type")));
}
out = mpz_get_si(z);
PG_RETURN_INT16(out);
}
PGMP_PG_FUNCTION(pmpz_to_int4)
{
const mpz_t z;
int32 out;
PGMP_GETARG_MPZ(z, 0);
if (!mpz_fits_sint_p(z)) {
ereport(ERROR, (
errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("numeric value too big to be converted to int4 data type")));
}
out = mpz_get_si(z);
PG_RETURN_INT32(out);
}
PGMP_PG_FUNCTION(pmpz_to_int8)
{
const mpz_t z;
int64 ret = 0;
PGMP_GETARG_MPZ(z, 0);
if (0 != pmpz_get_int64(z, &ret)) {
ereport(ERROR, (
errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("numeric value too big to be converted to int8 data type")));
}
PG_RETURN_INT64(ret);
}
/* Convert an mpz into and int64.
*
* return 0 in case of success, else a nonzero value
*/
int
pmpz_get_int64(mpz_srcptr z, int64 *out)
{
#if PGMP_LONG_64
if (mpz_fits_slong_p(z)) {
*out = mpz_get_si(z);
return 0;
}
#elif PGMP_LONG_32
switch (SIZ(z)) {
case 0:
*out = 0LL;
return 0;
break;
case 1:
*out = (int64)(LIMBS(z)[0]);
return 0;
break;
case -1:
*out = -(int64)(LIMBS(z)[0]);
return 0;
break;
case 2:
if (LIMBS(z)[1] < 0x80000000L) {
*out = (int64)(LIMBS(z)[1]) << 32
| (int64)(LIMBS(z)[0]);
return 0;
}
break;
case -2:
if (LIMBS(z)[1] < 0x80000000L) {
*out = -((int64)(LIMBS(z)[1]) << 32
| (int64)(LIMBS(z)[0]));
return 0;
}
else if (LIMBS(z)[0] == 0 && LIMBS(z)[1] == 0x80000000L) {
*out = -0x8000000000000000LL;
return 0;
}
break;
}
#endif
return -1;
}
PGMP_PG_FUNCTION(pmpz_to_float4)
{
const mpz_t z;
double out;
PGMP_GETARG_MPZ(z, 0);
out = mpz_get_d(z);
PG_RETURN_FLOAT4((float4)out);
}
PGMP_PG_FUNCTION(pmpz_to_float8)
{
const mpz_t z;
double out;
PGMP_GETARG_MPZ(z, 0);
out = mpz_get_d(z);
PG_RETURN_FLOAT8((float8)out);
}
|
16 | ./pgmp/src/pmpz_bits.c | /* pmpz_bits -- bit manipulation functions
*
* Copyright (C) 2011 Daniele Varrazzo
*
* This file is part of the PostgreSQL GMP Module
*
* The PostgreSQL GMP Module is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* The PostgreSQL GMP Module is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the PostgreSQL GMP Module. If not, see
* http://www.gnu.org/licenses/.
*/
#include "pmpz.h"
#include "pgmp-impl.h"
#include "fmgr.h"
#include "funcapi.h"
/* Function with a more generic signature are defined in pmpz.arith.c */
/* Macro to get and return mp_bitcnt_t
*
* the value is defined as unsigned long, so it doesn't fit into an int8 on 64
* bit platform. We'll convert them to/from mpz in SQL.
*/
#define PGMP_GETARG_BITCNT(tgt,n) \
do { \
mpz_t _tmp; \
PGMP_GETARG_MPZ(_tmp, n); \
\
if (!(mpz_fits_ulong_p(_tmp))) { \
ereport(ERROR, ( \
errcode(ERRCODE_INVALID_PARAMETER_VALUE), \
errmsg("argument doesn't fit into a bitcount type") )); \
} \
\
tgt = mpz_get_ui(_tmp); \
} while (0)
#define PGMP_RETURN_BITCNT(n) \
do { \
mpz_t _rv; \
mpz_init_set_ui(_rv, n); \
PGMP_RETURN_MPZ(_rv); \
} while (0)
/* Return the largest possible mp_bitcnt_t. Useful for testing the return
* value of a few other bit manipulation functions as the value depends on the
* server platform.
*/
PGMP_PG_FUNCTION(pgmp_max_bitcnt)
{
mp_bitcnt_t ret;
ret = ~((mp_bitcnt_t)0);
PGMP_RETURN_BITCNT(ret);
}
PGMP_PG_FUNCTION(pmpz_popcount)
{
const mpz_t z;
mp_bitcnt_t ret;
PGMP_GETARG_MPZ(z, 0);
ret = mpz_popcount(z);
PGMP_RETURN_BITCNT(ret);
}
PGMP_PG_FUNCTION(pmpz_hamdist)
{
const mpz_t z1;
const mpz_t z2;
mp_bitcnt_t ret;
PGMP_GETARG_MPZ(z1, 0);
PGMP_GETARG_MPZ(z2, 1);
ret = mpz_hamdist(z1, z2);
PGMP_RETURN_BITCNT(ret);
}
#define PMPZ_SCAN(f) \
\
PGMP_PG_FUNCTION(pmpz_ ## f) \
{ \
const mpz_t z; \
mp_bitcnt_t start; \
\
PGMP_GETARG_MPZ(z, 0); \
PGMP_GETARG_BITCNT(start, 1); \
\
PGMP_RETURN_BITCNT(mpz_ ## f(z, start)); \
}
PMPZ_SCAN(scan0)
PMPZ_SCAN(scan1)
/* inplace bit fiddling operations */
#define PMPZ_BIT(f) \
\
PGMP_PG_FUNCTION(pmpz_ ## f) \
{ \
const mpz_t z; \
mp_bitcnt_t idx; \
mpz_t ret; \
\
PGMP_GETARG_MPZ(z, 0); \
PGMP_GETARG_BITCNT(idx, 1); \
\
mpz_init_set(ret, z); \
mpz_ ## f(ret, idx); \
PGMP_RETURN_MPZ(ret); \
}
PMPZ_BIT(setbit)
PMPZ_BIT(clrbit)
#if __GMP_MP_RELEASE >= 40200
PMPZ_BIT(combit)
#endif
PGMP_PG_FUNCTION(pmpz_tstbit)
{
const mpz_t z;
mp_bitcnt_t idx;
int32 ret;
PGMP_GETARG_MPZ(z, 0);
PGMP_GETARG_BITCNT(idx, 1);
ret = mpz_tstbit(z, idx);
PG_RETURN_INT32(ret);
}
|
17 | ./pgmp/src/pmpq.c | /* pmpq -- PostgreSQL data type for GMP mpq
*
* Copyright (C) 2011 Daniele Varrazzo
*
* This file is part of the PostgreSQL GMP Module
*
* The PostgreSQL GMP Module is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* The PostgreSQL GMP Module is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the PostgreSQL GMP Module. If not, see
* http://www.gnu.org/licenses/.
*/
#include "pmpq.h"
#include "pgmp-impl.h"
#include "fmgr.h"
/* To be referred to to represent the zero */
extern const mp_limb_t _pgmp_limb_0;
extern const mp_limb_t _pgmp_limb_1;
/*
* Create a pmpq structure from the content of a mpq
*
* The function is not const as the numerator will be realloc'd to make room
* to the denom limbs after it. For this reason this function must never
* receive directly data read from the database.
*/
pmpq *
pmpq_from_mpq(mpq_ptr q)
{
pmpq *res;
mpz_ptr num = mpq_numref(q);
mpz_ptr den = mpq_denref(q);
int nsize = SIZ(num);
if (LIKELY(0 != nsize))
{
/* Make enough room after the numer to store the denom limbs */
int nalloc = ABS(nsize);
int dsize = SIZ(mpq_denref(q));
if (nalloc >= dsize)
{
LIMBS(num) = _mpz_realloc(num, nalloc + dsize);
res = (pmpq *)((char *)LIMBS(num) - PMPQ_HDRSIZE);
SET_VARSIZE(res,
PMPQ_HDRSIZE + (nalloc + dsize) * sizeof(mp_limb_t));
/* copy the denom after the numer */
memcpy(res->data + nalloc, LIMBS(den), dsize * sizeof(mp_limb_t));
/* Set the number of limbs and order and implicitly version 0 */
res->mdata = PMPQ_SET_SIZE_FIRST(PMPQ_SET_NUMER_FIRST(0), nalloc);
}
else {
LIMBS(den) = _mpz_realloc(den, nalloc + dsize);
res = (pmpq *)((char *)LIMBS(den) - PMPQ_HDRSIZE);
SET_VARSIZE(res,
PMPQ_HDRSIZE + (nalloc + dsize) * sizeof(mp_limb_t));
/* copy the numer after the denom */
memcpy(res->data + dsize, LIMBS(num), nalloc * sizeof(mp_limb_t));
/* Set the number of limbs and order and implicitly version 0 */
res->mdata = PMPQ_SET_SIZE_FIRST(PMPQ_SET_DENOM_FIRST(0), dsize);
}
/* Set the sign */
if (nsize < 0) { res->mdata = PMPQ_SET_NEGATIVE(res->mdata); }
}
else
{
res = (pmpq *)((char *)LIMBS(num) - PMPQ_HDRSIZE);
SET_VARSIZE(res, PMPQ_HDRSIZE);
res->mdata = 0;
}
return res;
}
/*
* Initialize a mpq from the content of a datum
*
* NOTE: the function takes a pointer to a const and changes the structure.
* This allows to define the structure as const in the calling function and
* avoid the risk to change it inplace, which may corrupt the database data.
*
* The structure populated doesn't own the pointed data, so it must not be
* changed in any way and must not be cleared.
*/
void
mpq_from_pmpq(mpq_srcptr q, const pmpq *pq)
{
/* discard the const qualifier */
mpq_ptr wq = (mpq_ptr)q;
mpz_ptr num = mpq_numref(wq);
mpz_ptr den = mpq_denref(wq);
if (UNLIKELY(0 != (PMPQ_VERSION(pq)))) {
ereport(ERROR, (
errcode(ERRCODE_DATA_EXCEPTION),
errmsg("unsupported mpq version: %d", PMPQ_VERSION(pq))));
}
if (0 != PMPQ_NLIMBS(pq))
{
mpz_ptr fst, snd;
if (PMPQ_NUMER_FIRST(pq)) {
fst = num; snd = den;
}
else {
fst = den; snd = num;
}
/* We have data from numer and denom into the datum */
ALLOC(fst) = SIZ(fst) = PMPQ_SIZE_FIRST(pq);
LIMBS(fst) = (mp_limb_t *)pq->data;
ALLOC(snd) = SIZ(snd) = PMPQ_SIZE_SECOND(pq);
LIMBS(snd) = (mp_limb_t *)pq->data + ALLOC(fst);
if (PMPQ_NEGATIVE(pq)) { SIZ(num) = -SIZ(num); }
}
else {
/* in the datum there is not 1/0,
* so let's just refer to some static const */
ALLOC(num) = 1;
SIZ(num) = 0;
LIMBS(num) = (mp_limb_t *)(&_pgmp_limb_0);
ALLOC(den) = 1;
SIZ(den) = 1;
LIMBS(den) = (mp_limb_t *)(&_pgmp_limb_1);
}
}
|
18 | ./pgmp/src/pmpq_agg.c | /* pmpq_agg -- mpq aggregation functions
*
* Copyright (C) 2011 Daniele Varrazzo
*
* This file is part of the PostgreSQL GMP Module
*
* The PostgreSQL GMP Module is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* The PostgreSQL GMP Module is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the PostgreSQL GMP Module. If not, see
* http://www.gnu.org/licenses/.
*/
#include "pmpq.h"
#include "pgmp_utils.h" /* for AggCheckCallContext on PG < 9.0 */
#include "pgmp-impl.h"
#include "fmgr.h"
/* Convert an inplace accumulator into a pmpq structure.
*
* This function is strict, so don't care about NULLs
*/
PGMP_PG_FUNCTION(_pmpq_from_agg)
{
mpq_t *a;
a = (mpq_t *)PG_GETARG_POINTER(0);
PGMP_RETURN_MPQ(*a);
}
/* Macro to create an accumulation function from a gmp operator.
*
* This function can't be strict because the internal state is not compatible
* with the base type.
*/
#define PMPQ_AGG(op, BLOCK, rel) \
\
PGMP_PG_FUNCTION(_pmpq_agg_ ## op) \
{ \
mpq_t *a; \
const mpq_t q; \
MemoryContext oldctx; \
MemoryContext aggctx; \
\
if (UNLIKELY(!AggCheckCallContext(fcinfo, &aggctx))) \
{ \
ereport(ERROR, \
(errcode(ERRCODE_DATA_EXCEPTION), \
errmsg("_mpq_agg_" #op " can only be called in accumulation"))); \
} \
\
if (PG_ARGISNULL(1)) { \
if (PG_ARGISNULL(0)) { \
PG_RETURN_NULL(); \
} \
else { \
PG_RETURN_POINTER(PG_GETARG_POINTER(0)); \
} \
} \
\
PGMP_GETARG_MPQ(q, 1); \
\
oldctx = MemoryContextSwitchTo(aggctx); \
\
if (LIKELY(!PG_ARGISNULL(0))) { \
a = (mpq_t *)PG_GETARG_POINTER(0); \
BLOCK(op, rel); \
} \
else { /* uninitialized */ \
a = (mpq_t *)palloc(sizeof(mpq_t)); \
mpq_init(*a); \
mpq_set(*a, q); \
} \
\
MemoryContextSwitchTo(oldctx); \
\
PG_RETURN_POINTER(a); \
}
#define PMPQ_AGG_OP(op, rel) \
mpq_ ## op (*a, *a, q)
PMPQ_AGG(add, PMPQ_AGG_OP, 0)
PMPQ_AGG(mul, PMPQ_AGG_OP, 0)
#define PMPQ_AGG_REL(op, rel) \
do { \
if (mpq_cmp(*a, q) rel 0) { \
mpq_set(*a, q); \
} \
} while (0)
PMPQ_AGG(min, PMPQ_AGG_REL, >)
PMPQ_AGG(max, PMPQ_AGG_REL, <)
|
19 | ./little-cms/utils/samples/vericc.c | //---------------------------------------------------------------------------------
//
// Little Color Management System
// Copyright (c) 1998-2010 Marti Maria Saguer
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//---------------------------------------------------------------------------------
//
#include "lcms2.h"
#include <string.h>
#include <math.h>
static
int PrintUsage(void)
{
fprintf(stderr, "Sets profile version\n\nUsage: vericc --r<version> iccprofile.icc\n");
return 0;
}
int main(int argc, char *argv[])
{
cmsHPROFILE hProfile;
char* ptr;
cmsFloat64Number Version;
if (argc != 3) return PrintUsage();
ptr = argv[1];
if (strncmp(ptr, "--r", 3) != 0) return PrintUsage();
ptr += 3;
if (!*ptr) { fprintf(stderr, "Wrong version number\n"); return 1; }
Version = atof(ptr);
hProfile = cmsOpenProfileFromFile(argv[2], "r");
if (hProfile == NULL) { fprintf(stderr, "'%s': cannot open\n", argv[2]); return 1; }
cmsSetProfileVersion(hProfile, Version);
cmsSaveProfileToFile(hProfile, "$$tmp.icc");
cmsCloseProfile(hProfile);
remove(argv[2]);
rename("$$tmp.icc", argv[2]);
return 0;
}
|
20 | ./little-cms/utils/samples/mktiff8.c | //
// Little cms
// Copyright (C) 1998-2010 Marti Maria
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// Creates a devicelink that decodes TIFF8 Lab files
#include "lcms2.h"
#include <stdlib.h>
#include <math.h>
static
double DecodeAbTIFF(double ab)
{
if (ab <= 128.)
ab += 127.;
else
ab -= 127.;
return ab;
}
static
cmsToneCurve* CreateStep(void)
{
cmsToneCurve* Gamma;
cmsUInt16Number* Table;
int i;
double a;
Table = calloc(4096, sizeof(cmsUInt16Number));
if (Table == NULL) return NULL;
for (i=0; i < 4096; i++) {
a = (double) i * 255. / 4095.;
a = DecodeAbTIFF(a);
Table[i] = (cmsUInt16Number) floor(a * 257. + 0.5);
}
Gamma = cmsBuildTabulatedToneCurve16(0, 4096, Table);
free(Table);
return Gamma;
}
static
cmsToneCurve* CreateLinear(void)
{
cmsUInt16Number Linear[2] = { 0, 0xffff };
return cmsBuildTabulatedToneCurve16(0, 2, Linear);
}
// Set the copyright and description
static
cmsBool SetTextTags(cmsHPROFILE hProfile)
{
cmsMLU *DescriptionMLU, *CopyrightMLU;
cmsBool rc = FALSE;
DescriptionMLU = cmsMLUalloc(0, 1);
CopyrightMLU = cmsMLUalloc(0, 1);
if (DescriptionMLU == NULL || CopyrightMLU == NULL) goto Error;
if (!cmsMLUsetASCII(DescriptionMLU, "en", "US", "Little cms Tiff8 CIELab")) goto Error;
if (!cmsMLUsetASCII(CopyrightMLU, "en", "US", "Copyright (c) Marti Maria, 2010. All rights reserved.")) goto Error;
if (!cmsWriteTag(hProfile, cmsSigProfileDescriptionTag, DescriptionMLU)) goto Error;
if (!cmsWriteTag(hProfile, cmsSigCopyrightTag, CopyrightMLU)) goto Error;
rc = TRUE;
Error:
if (DescriptionMLU)
cmsMLUfree(DescriptionMLU);
if (CopyrightMLU)
cmsMLUfree(CopyrightMLU);
return rc;
}
int main(int argc, char *argv[])
{
cmsHPROFILE hProfile;
cmsPipeline *AToB0;
cmsToneCurve* PreLinear[3];
cmsToneCurve *Lin, *Step;
fprintf(stderr, "Creating lcmstiff8.icm...");
remove("lcmstiff8.icm");
hProfile = cmsOpenProfileFromFile("lcmstiff8.icm", "w");
// Create linearization
Lin = CreateLinear();
Step = CreateStep();
PreLinear[0] = Lin;
PreLinear[1] = Step;
PreLinear[2] = Step;
AToB0 = cmsPipelineAlloc(0, 3, 3);
cmsPipelineInsertStage(AToB0,
cmsAT_BEGIN, cmsStageAllocToneCurves(0, 3, PreLinear));
cmsSetColorSpace(hProfile, cmsSigLabData);
cmsSetPCS(hProfile, cmsSigLabData);
cmsSetDeviceClass(hProfile, cmsSigLinkClass);
cmsSetProfileVersion(hProfile, 4.2);
cmsWriteTag(hProfile, cmsSigAToB0Tag, AToB0);
SetTextTags(hProfile);
cmsCloseProfile(hProfile);
cmsFreeToneCurve(Lin);
cmsFreeToneCurve(Step);
cmsPipelineFree(AToB0);
fprintf(stderr, "Done.\n");
return 0;
}
|
21 | ./little-cms/utils/samples/itufax.c | //
// Little cms
// Copyright (C) 1998-2003 Marti Maria
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#include "lcms.h"
// This is a sample on how to build a profile for decoding ITU T.42/Fax JPEG
// streams. The profile has an additional ability in the input direction of
// gamut compress values between 85 < a < -85 and -75 < b < 125. This conforms
// the default range for ITU/T.42 -- See RFC 2301, section 6.2.3 for details
// L* = [0, 100]
// a* = [û85, 85]
// b* = [û75, 125]
// These functions does convert the encoding of ITUFAX to floating point
static
void ITU2Lab(WORD In[3], LPcmsCIELab Lab)
{
Lab -> L = (double) In[0] / 655.35;
Lab -> a = (double) 170.* (In[1] - 32768.) / 65535.;
Lab -> b = (double) 200.* (In[2] - 24576.) / 65535.;
}
static
void Lab2ITU(LPcmsCIELab Lab, WORD Out[3])
{
Out[0] = (WORD) floor((double) (Lab -> L / 100.)* 65535. + 0.5);
Out[1] = (WORD) floor((double) (Lab -> a / 170.)* 65535. + 32768. + 0.5);
Out[2] = (WORD) floor((double) (Lab -> b / 200.)* 65535. + 24576. + 0.5);
}
// These are the samplers-- They are passed as callbacks to cmsSample3DGrid()
// then, cmsSample3DGrid() will sweel whole Lab gamut calling these functions
// once for each node. In[] will contain the Lab PCS value to convert to ITUFAX
// on InputDirection, or the ITUFAX value to convert to Lab in OutputDirection
// You can change the number of sample points if desired, the algorithm will
// remain same. 33 points gives good accurancy, but you can reduce to 22 or less
// is space is critical
#define GRID_POINTS 33
static
int InputDirection(register WORD In[], register WORD Out[], register LPVOID Cargo)
{
cmsCIELab Lab;
cmsLabEncoded2Float(&Lab, In);
cmsClampLab(&Lab, 85, -85, 125, -75); // This function does the necessary gamut remapping
Lab2ITU(&Lab, Out);
return TRUE;
}
static
int OutputDirection(register WORD In[], register WORD Out[], register LPVOID Cargo)
{
cmsCIELab Lab;
ITU2Lab(In, &Lab);
cmsFloat2LabEncoded(Out, &Lab);
return TRUE;
}
// The main entry point. Just create a profile an populate it with required tags.
// note that cmsOpenProfileFromFile("itufax.icm", "w") will NOT delete the file
// if already exists. This is for obvious safety reasons.
int main(int argc, char *argv[])
{
LPLUT AToB0, BToA0;
cmsHPROFILE hProfile;
fprintf(stderr, "Creating itufax.icm...");
unlink("itufax.icm");
hProfile = cmsOpenProfileFromFile("itufax.icm", "w");
AToB0 = cmsAllocLUT();
BToA0 = cmsAllocLUT();
cmsAlloc3DGrid(AToB0, GRID_POINTS, 3, 3);
cmsAlloc3DGrid(BToA0, GRID_POINTS, 3, 3);
cmsSample3DGrid(AToB0, InputDirection, NULL, 0);
cmsSample3DGrid(BToA0, OutputDirection, NULL, 0);
cmsAddTag(hProfile, icSigAToB0Tag, AToB0);
cmsAddTag(hProfile, icSigBToA0Tag, BToA0);
cmsSetColorSpace(hProfile, icSigLabData);
cmsSetPCS(hProfile, icSigLabData);
cmsSetDeviceClass(hProfile, icSigColorSpaceClass);
cmsAddTag(hProfile, icSigProfileDescriptionTag, "ITU T.42/Fax JPEG CIEL*a*b*");
cmsAddTag(hProfile, icSigCopyrightTag, "No Copyright, use freely.");
cmsAddTag(hProfile, icSigDeviceMfgDescTag, "Little cms");
cmsAddTag(hProfile, icSigDeviceModelDescTag, "ITU T.42/Fax JPEG CIEL*a*b*");
cmsCloseProfile(hProfile);
cmsFreeLUT(AToB0);
cmsFreeLUT(BToA0);
fprintf(stderr, "Done.\n");
return 0;
}
|
22 | ./little-cms/utils/samples/mkcmy.c | //
// Little cms
// Copyright (C) 1998-2003 Marti Maria
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THIS SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
// EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
// WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
//
// IN NO EVENT SHALL MARTI MARIA BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
// INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
// OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
// WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
// LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
// OF THIS SOFTWARE.
//
// Version 1.12
#include "lcms.h"
typedef struct {
cmsHPROFILE hLab;
cmsHPROFILE hRGB;
cmsHTRANSFORM Lab2RGB;
cmsHTRANSFORM RGB2Lab;
} CARGO, FAR* LPCARGO;
// Our space will be CIE primaries plus a gamma of 4.5
static
int Forward(register WORD In[], register WORD Out[], register LPVOID Cargo)
{
LPCARGO C = (LPCARGO) Cargo;
WORD RGB[3];
cmsCIELab Lab;
cmsLabEncoded2Float(&Lab, In);
printf("%g %g %g\n", Lab.L, Lab.a, Lab.b);
cmsDoTransform(C ->Lab2RGB, In, &RGB, 1);
Out[0] = 0xFFFF - RGB[0]; // Our CMY is negative of RGB
Out[1] = 0xFFFF - RGB[1];
Out[2] = 0xFFFF - RGB[2];
return TRUE;
}
static
int Reverse(register WORD In[], register WORD Out[], register LPVOID Cargo)
{
LPCARGO C = (LPCARGO) Cargo;
WORD RGB[3];
RGB[0] = 0xFFFF - In[0];
RGB[1] = 0xFFFF - In[1];
RGB[2] = 0xFFFF - In[2];
cmsDoTransform(C ->RGB2Lab, &RGB, Out, 1);
return TRUE;
}
static
void InitCargo(LPCARGO Cargo)
{
Cargo -> hLab = cmsCreateLabProfile(NULL);
Cargo -> hRGB = cmsCreate_sRGBProfile();
Cargo->Lab2RGB = cmsCreateTransform(Cargo->hLab, TYPE_Lab_16,
Cargo ->hRGB, TYPE_RGB_16,
INTENT_RELATIVE_COLORIMETRIC,
cmsFLAGS_NOTPRECALC);
Cargo->RGB2Lab = cmsCreateTransform(Cargo ->hRGB, TYPE_RGB_16,
Cargo ->hLab, TYPE_Lab_16,
INTENT_RELATIVE_COLORIMETRIC,
cmsFLAGS_NOTPRECALC);
}
static
void FreeCargo(LPCARGO Cargo)
{
cmsDeleteTransform(Cargo ->Lab2RGB);
cmsDeleteTransform(Cargo ->RGB2Lab);
cmsCloseProfile(Cargo ->hLab);
cmsCloseProfile(Cargo ->hRGB);
}
int main(void)
{
LPLUT AToB0, BToA0;
CARGO Cargo;
cmsHPROFILE hProfile;
fprintf(stderr, "Creating lcmscmy.icm...");
InitCargo(&Cargo);
hProfile = cmsCreateLabProfile(NULL);
AToB0 = cmsAllocLUT();
BToA0 = cmsAllocLUT();
cmsAlloc3DGrid(AToB0, 25, 3, 3);
cmsAlloc3DGrid(BToA0, 25, 3, 3);
cmsSample3DGrid(AToB0, Reverse, &Cargo, 0);
cmsSample3DGrid(BToA0, Forward, &Cargo, 0);
cmsAddTag(hProfile, icSigAToB0Tag, AToB0);
cmsAddTag(hProfile, icSigBToA0Tag, BToA0);
cmsSetColorSpace(hProfile, icSigCmyData);
cmsSetDeviceClass(hProfile, icSigOutputClass);
cmsAddTag(hProfile, icSigProfileDescriptionTag, "CMY ");
cmsAddTag(hProfile, icSigCopyrightTag, "Copyright (c) HP, 2007. All rights reserved.");
cmsAddTag(hProfile, icSigDeviceMfgDescTag, "Little cms");
cmsAddTag(hProfile, icSigDeviceModelDescTag, "CMY space");
_cmsSaveProfile(hProfile, "lcmscmy.icm");
cmsFreeLUT(AToB0);
cmsFreeLUT(BToA0);
cmsCloseProfile(hProfile);
FreeCargo(&Cargo);
fprintf(stderr, "Done.\n");
return 0;
}
|
23 | ./little-cms/utils/samples/wtpt.c | //
// Little cms
// Copyright (C) 1998-2000 Marti Maria
//
// THIS SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
// EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
// WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
//
// IN NO EVENT SHALL MARTI MARIA BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
// INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
// OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
// WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
// LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
// OF THIS SOFTWARE.
//
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
// Example: how to show white points of profiles
#include "lcms.h"
static
void ShowWhitePoint(LPcmsCIEXYZ WtPt)
{
cmsCIELab Lab;
cmsCIELCh LCh;
cmsCIExyY xyY;
char Buffer[1024];
_cmsIdentifyWhitePoint(Buffer, WtPt);
printf("%s\n", Buffer);
cmsXYZ2Lab(NULL, &Lab, WtPt);
cmsLab2LCh(&LCh, &Lab);
cmsXYZ2xyY(&xyY, WtPt);
printf("XYZ=(%3.1f, %3.1f, %3.1f)\n", WtPt->X, WtPt->Y, WtPt->Z);
printf("Lab=(%3.3f, %3.3f, %3.3f)\n", Lab.L, Lab.a, Lab.b);
printf("(x,y)=(%3.3f, %3.3f)\n", xyY.x, xyY.y);
printf("Hue=%3.2f, Chroma=%3.2f\n", LCh.h, LCh.C);
printf("\n");
}
int main (int argc, char *argv[])
{
printf("Show media white of profiles, identifying black body locus. v2\n\n");
if (argc == 2) {
cmsCIEXYZ WtPt;
cmsHPROFILE hProfile = cmsOpenProfileFromFile(argv[1], "r");
printf("%s\n", cmsTakeProductName(hProfile));
cmsTakeMediaWhitePoint(&WtPt, hProfile);
ShowWhitePoint(&WtPt);
cmsCloseProfile(hProfile);
}
else
{
cmsCIEXYZ xyz;
printf("usage:\n\nIf no parameters are given, then this program will\n");
printf("ask for XYZ value of media white. If parameter given, it must be\n");
printf("the profile to inspect.\n\n");
printf("X? "); scanf("%lf", &xyz.X);
printf("Y? "); scanf("%lf", &xyz.Y);
printf("Z? "); scanf("%lf", &xyz.Z);
ShowWhitePoint(&xyz);
}
return 0;
}
|
24 | ./little-cms/utils/samples/roundtrip.c | //
// Little cms
// Copyright (C) 1998-2011 Marti Maria
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
#include "lcms2.h"
#include <math.h>
static
double VecDist(cmsUInt8Number bin[3], cmsUInt8Number bout[3])
{
double rdist, gdist, bdist;
rdist = fabs((double) bout[0] - bin[0]);
gdist = fabs((double) bout[1] - bin[1]);
bdist = fabs((double) bout[2] - bin[2]);
return (sqrt((rdist*rdist + gdist*gdist + bdist*bdist)));
}
int main(int argc, char* argv[])
{
int r, g, b;
cmsUInt8Number RGB[3], RGB_OUT[3];
cmsHTRANSFORM xform;
cmsHPROFILE hProfile;
double err, SumX=0, SumX2=0, Peak = 0, n = 0;
if (argc != 2) {
printf("roundtrip <RGB icc profile>\n");
return 1;
}
hProfile = cmsOpenProfileFromFile(argv[1], "r");
xform = cmsCreateTransform(hProfile,TYPE_RGB_8, hProfile, TYPE_RGB_8, INTENT_RELATIVE_COLORIMETRIC, cmsFLAGS_NOOPTIMIZE);
for (r=0; r< 256; r++) {
printf("%d \r", r);
for (g=0; g < 256; g++) {
for (b=0; b < 256; b++) {
RGB[0] = r;
RGB[1] = g;
RGB[2] = b;
cmsDoTransform(xform, RGB, RGB_OUT, 1);
err = VecDist(RGB, RGB_OUT);
SumX += err;
SumX2 += err * err;
n += 1.0;
if (err > Peak)
Peak = err;
}
}
}
printf("Average %g\n", SumX / n);
printf("Max %g\n", Peak);
printf("Std %g\n", sqrt((n*SumX2 - SumX * SumX) / (n*(n-1))));
cmsCloseProfile(hProfile);
cmsDeleteTransform(xform);
return 0;
} |
25 | ./little-cms/utils/samples/mkgrayer.c | //
// Little cms
// Copyright (C) 1998-2003 Marti Maria
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#include "lcms.h"
static
int Forward(register WORD In[], register WORD Out[], register LPVOID Cargo)
{
cmsCIELab Lab;
cmsLabEncoded2Float(&Lab, In);
if (fabs(Lab.a) < 3 && fabs(Lab.b) < 3) {
double L_01 = Lab.L / 100.0;
WORD K;
if (L_01 > 1) L_01 = 1;
K = (WORD) floor(L_01* 65535.0 + 0.5);
Out[0] = Out[1] = Out[2] = K;
}
else {
Out[0] = 0xFFFF; Out[1] = 0; Out[2] = 0;
}
return TRUE;
}
int main(int argc, char *argv[])
{
LPLUT BToA0;
cmsHPROFILE hProfile;
fprintf(stderr, "Creating interpol2.icc...");
unlink("interpol2.icc");
hProfile = cmsOpenProfileFromFile("interpol2.icc", "w8");
BToA0 = cmsAllocLUT();
cmsAlloc3DGrid(BToA0, 17, 3, 3);
cmsSample3DGrid(BToA0, Forward, NULL, 0);
cmsAddTag(hProfile, icSigBToA0Tag, BToA0);
cmsSetColorSpace(hProfile, icSigRgbData);
cmsSetPCS(hProfile, icSigLabData);
cmsSetDeviceClass(hProfile, icSigOutputClass);
cmsAddTag(hProfile, icSigProfileDescriptionTag, "Interpolation test");
cmsAddTag(hProfile, icSigCopyrightTag, "Copyright (c) HP 2007. All rights reserved.");
cmsAddTag(hProfile, icSigDeviceMfgDescTag, "Little cms");
cmsAddTag(hProfile, icSigDeviceModelDescTag, "Interpolation test profile");
cmsCloseProfile(hProfile);
cmsFreeLUT(BToA0);
fprintf(stderr, "Done.\n");
return 0;
}
|
26 | ./little-cms/utils/common/xgetopt.c | /*
getopt.c
*/
#include <errno.h>
#include <string.h>
#include <stdio.h>
int xoptind = 1; /* index of which argument is next */
char *xoptarg; /* pointer to argument of current option */
int xopterr = 0; /* allow error message */
static char *letP = NULL; /* remember next option char's location */
char SW = '-'; /* DOS switch character, either '-' or '/' */
/*
Parse the command line options, System V style.
Standard option syntax is:
option ::= SW [optLetter]* [argLetter space* argument]
*/
int xgetopt(int argc, char *argv[], char *optionS)
{
unsigned char ch;
char *optP;
if (SW == 0) {
SW = '/';
}
if (argc > xoptind) {
if (letP == NULL) {
if ((letP = argv[xoptind]) == NULL ||
*(letP++) != SW) goto gopEOF;
if (*letP == SW) {
xoptind++; goto gopEOF;
}
}
if (0 == (ch = *(letP++))) {
xoptind++; goto gopEOF;
}
if (':' == ch || (optP = strchr(optionS, ch)) == NULL)
goto gopError;
if (':' == *(++optP)) {
xoptind++;
if (0 == *letP) {
if (argc <= xoptind) goto gopError;
letP = argv[xoptind++];
}
xoptarg = letP;
letP = NULL;
} else {
if (0 == *letP) {
xoptind++;
letP = NULL;
}
xoptarg = NULL;
}
return ch;
}
gopEOF:
xoptarg = letP = NULL;
return EOF;
gopError:
xoptarg = NULL;
errno = EINVAL;
if (xopterr)
perror ("get command line option");
return ('?');
}
|
27 | ./little-cms/utils/common/vprf.c | //---------------------------------------------------------------------------------
//
// Little Color Management System
// Copyright (c) 1998-2010 Marti Maria Saguer
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//---------------------------------------------------------------------------------
//
#include "utils.h"
int Verbose = 0;
static char ProgramName[256] = "";
void FatalError(const char *frm, ...)
{
va_list args;
va_start(args, frm);
fprintf(stderr, "[%s fatal error]: ", ProgramName);
vfprintf(stderr, frm, args);
fprintf(stderr, "\n");
va_end(args);
exit(1);
}
// Show errors to the end user (unless quiet option)
static
void MyErrorLogHandler(cmsContext ContextID, cmsUInt32Number ErrorCode, const char *Text)
{
if (Verbose >= 0)
fprintf(stderr, "[%s]: %s\n", ProgramName, Text);
UTILS_UNUSED_PARAMETER(ErrorCode);
UTILS_UNUSED_PARAMETER(ContextID);
}
void InitUtils(const char* PName)
{
strncpy(ProgramName, PName, sizeof(ProgramName));
ProgramName[sizeof(ProgramName)-1] = 0;
cmsSetLogErrorHandler(MyErrorLogHandler);
}
// Virtual profiles are handled here.
cmsHPROFILE OpenStockProfile(cmsContext ContextID, const char* File)
{
if (!File)
return cmsCreate_sRGBProfileTHR(ContextID);
if (cmsstrcasecmp(File, "*Lab2") == 0)
return cmsCreateLab2ProfileTHR(ContextID, NULL);
if (cmsstrcasecmp(File, "*Lab4") == 0)
return cmsCreateLab4ProfileTHR(ContextID, NULL);
if (cmsstrcasecmp(File, "*Lab") == 0)
return cmsCreateLab4ProfileTHR(ContextID, NULL);
if (cmsstrcasecmp(File, "*LabD65") == 0) {
cmsCIExyY D65xyY;
cmsWhitePointFromTemp( &D65xyY, 6504);
return cmsCreateLab4ProfileTHR(ContextID, &D65xyY);
}
if (cmsstrcasecmp(File, "*XYZ") == 0)
return cmsCreateXYZProfileTHR(ContextID);
if (cmsstrcasecmp(File, "*Gray22") == 0) {
cmsToneCurve* Curve = cmsBuildGamma(ContextID, 2.2);
cmsHPROFILE hProfile = cmsCreateGrayProfileTHR(ContextID, cmsD50_xyY(), Curve);
cmsFreeToneCurve(Curve);
return hProfile;
}
if (cmsstrcasecmp(File, "*Gray30") == 0) {
cmsToneCurve* Curve = cmsBuildGamma(ContextID, 3.0);
cmsHPROFILE hProfile = cmsCreateGrayProfileTHR(ContextID, cmsD50_xyY(), Curve);
cmsFreeToneCurve(Curve);
return hProfile;
}
if (cmsstrcasecmp(File, "*srgb") == 0)
return cmsCreate_sRGBProfileTHR(ContextID);
if (cmsstrcasecmp(File, "*null") == 0)
return cmsCreateNULLProfileTHR(ContextID);
if (cmsstrcasecmp(File, "*Lin2222") == 0) {
cmsToneCurve* Gamma = cmsBuildGamma(0, 2.2);
cmsToneCurve* Gamma4[4];
cmsHPROFILE hProfile;
Gamma4[0] = Gamma4[1] = Gamma4[2] = Gamma4[3] = Gamma;
hProfile = cmsCreateLinearizationDeviceLink(cmsSigCmykData, Gamma4);
cmsFreeToneCurve(Gamma);
return hProfile;
}
return cmsOpenProfileFromFileTHR(ContextID, File, "r");
}
// Help on available built-ins
void PrintBuiltins(void)
{
fprintf(stderr, "\nBuilt-in profiles:\n\n");
fprintf(stderr, "\t*Lab2 -- D50-based v2 CIEL*a*b\n"
"\t*Lab4 -- D50-based v4 CIEL*a*b\n"
"\t*Lab -- D50-based v4 CIEL*a*b\n"
"\t*XYZ -- CIE XYZ (PCS)\n"
"\t*sRGB -- sRGB color space\n"
"\t*Gray22 - Monochrome of Gamma 2.2\n"
"\t*Gray30 - Monochrome of Gamma 3.0\n"
"\t*null - Monochrome black for all input\n"
"\t*Lin2222- CMYK linearization of gamma 2.2 on each channel\n");
}
// Auxiliar for printing information on profile
static
void PrintInfo(cmsHPROFILE h, cmsInfoType Info)
{
char* text;
int len;
len = cmsGetProfileInfoASCII(h, Info, "en", "US", NULL, 0);
if (len == 0) return;
text = malloc(len * sizeof(char));
if (text == NULL) return;
cmsGetProfileInfoASCII(h, Info, "en", "US", text, len);
if (strlen(text) > 0)
printf("%s\n", text);
free(text);
}
// Displays the colorant table
static
void PrintColorantTable(cmsHPROFILE hInput, cmsTagSignature Sig, const char* Title)
{
cmsNAMEDCOLORLIST* list;
int i, n;
if (cmsIsTag(hInput, Sig)) {
printf("%s:\n", Title);
list = cmsReadTag(hInput, Sig);
if (list == NULL) {
printf("(Unavailable)\n");
return;
}
n = cmsNamedColorCount(list);
for (i=0; i < n; i++) {
char Name[cmsMAX_PATH];
cmsNamedColorInfo(list, i, Name, NULL, NULL, NULL, NULL);
printf("\t%s\n", Name);
}
printf("\n");
}
}
void PrintProfileInformation(cmsHPROFILE hInput)
{
PrintInfo(hInput, cmsInfoDescription);
PrintInfo(hInput, cmsInfoManufacturer);
PrintInfo(hInput, cmsInfoModel);
PrintInfo(hInput, cmsInfoCopyright);
if (Verbose > 2) {
PrintColorantTable(hInput, cmsSigColorantTableTag, "Input colorant table");
PrintColorantTable(hInput, cmsSigColorantTableOutTag, "Input colorant out table");
}
printf("\n");
}
// -----------------------------------------------------------------------------
void PrintRenderingIntents(void)
{
cmsUInt32Number Codes[200];
char* Descriptions[200];
cmsUInt32Number n, i;
fprintf(stderr, "%ct<n> rendering intent:\n\n", SW);
n = cmsGetSupportedIntents(200, Codes, Descriptions);
for (i=0; i < n; i++) {
fprintf(stderr, "\t%u - %s\n", Codes[i], Descriptions[i]);
}
fprintf(stderr, "\n");
}
// ------------------------------------------------------------------------------
cmsBool SaveMemoryBlock(const cmsUInt8Number* Buffer, cmsUInt32Number dwLen, const char* Filename)
{
FILE* out = fopen(Filename, "wb");
if (out == NULL) {
FatalError("Cannot create '%s'", Filename);
return FALSE;
}
if (fwrite(Buffer, 1, dwLen, out) != dwLen) {
FatalError("Cannot write %ld bytes to %s", dwLen, Filename);
return FALSE;
}
if (fclose(out) != 0) {
FatalError("Error flushing file '%s'", Filename);
return FALSE;
}
return TRUE;
}
// ------------------------------------------------------------------------------
// Return a pixel type on depending on the number of channels
int PixelTypeFromChanCount(int ColorChannels)
{
switch (ColorChannels) {
case 1: return PT_GRAY;
case 2: return PT_MCH2;
case 3: return PT_MCH3;
case 4: return PT_CMYK;
case 5: return PT_MCH5;
case 6: return PT_MCH6;
case 7: return PT_MCH7;
case 8: return PT_MCH8;
case 9: return PT_MCH9;
case 10: return PT_MCH10;
case 11: return PT_MCH11;
case 12: return PT_MCH12;
case 13: return PT_MCH13;
case 14: return PT_MCH14;
case 15: return PT_MCH15;
default:
FatalError("What a weird separation of %d channels?!?!", ColorChannels);
return -1;
}
}
// ------------------------------------------------------------------------------
// Return number of channels of pixel type
int ChanCountFromPixelType(int ColorChannels)
{
switch (ColorChannels) {
case PT_GRAY: return 1;
case PT_RGB:
case PT_CMY:
case PT_Lab:
case PT_YUV:
case PT_YCbCr: return 3;
case PT_CMYK: return 4 ;
case PT_MCH2: return 2 ;
case PT_MCH3: return 3 ;
case PT_MCH4: return 4 ;
case PT_MCH5: return 5 ;
case PT_MCH6: return 6 ;
case PT_MCH7: return 7 ;
case PT_MCH8: return 8 ;
case PT_MCH9: return 9 ;
case PT_MCH10: return 10;
case PT_MCH11: return 11;
case PT_MCH12: return 12;
case PT_MCH13: return 12;
case PT_MCH14: return 14;
case PT_MCH15: return 15;
default:
FatalError("Unsupported color space of %d channels", ColorChannels);
return -1;
}
}
|
28 | ./little-cms/utils/jpgicc/jpgicc.c | //---------------------------------------------------------------------------------
//
// Little Color Management System
// Copyright (c) 1998-2010 Marti Maria Saguer
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// This program does apply profiles to (some) JPEG files
#include "utils.h"
#include "jpeglib.h"
#include "iccjpeg.h"
// Flags
static cmsBool BlackPointCompensation = FALSE;
static cmsBool IgnoreEmbedded = FALSE;
static cmsBool GamutCheck = FALSE;
static cmsBool lIsITUFax = FALSE;
static cmsBool lIsPhotoshopApp13 = FALSE;
static cmsBool lIsEXIF;
static cmsBool lIsDeviceLink = FALSE;
static cmsBool EmbedProfile = FALSE;
static const char* SaveEmbedded = NULL;
static int Intent = INTENT_PERCEPTUAL;
static int ProofingIntent = INTENT_PERCEPTUAL;
static int PrecalcMode = 1;
static int jpegQuality = 75;
static cmsFloat64Number ObserverAdaptationState = 0;
static char *cInpProf = NULL;
static char *cOutProf = NULL;
static char *cProofing = NULL;
static FILE * InFile;
static FILE * OutFile;
static struct jpeg_decompress_struct Decompressor;
static struct jpeg_compress_struct Compressor;
static struct my_error_mgr {
struct jpeg_error_mgr pub; // "public" fields
void* Cargo; // "private" fields
} ErrorHandler;
cmsUInt16Number Alarm[4] = {128,128,128,0};
// Out of mem
static
void OutOfMem(size_t size)
{
FatalError("Out of memory on allocating %d bytes.", size);
}
static
void my_error_exit (j_common_ptr cinfo)
{
char buffer[JMSG_LENGTH_MAX];
(*cinfo->err->format_message) (cinfo, buffer);
FatalError(buffer);
}
/*
Definition of the APPn Markers Defined for continuous-tone G3FAX
The application code APP1 initiates identification of the image as
a G3FAX application and defines the spatial resolution and subsampling.
This marker directly follows the SOI marker. The data format will be as follows:
X'FFE1' (APP1), length, FAX identifier, version, spatial resolution.
The above terms are defined as follows:
Length: (Two octets) Total APP1 field octet count including the octet count itself, but excluding the APP1
marker.
FAX identifier: (Six octets) X'47', X'33', X'46', X'41', X'58', X'00'. This X'00'-terminated string "G3FAX"
uniquely identifies this APP1 marker.
Version: (Two octets) X'07CA'. This string specifies the year of approval of the standard, for identification
in the case of future revision (for example, 1994).
Spatial Resolution: (Two octets) Lightness pixel density in pels/25.4 mm. The basic value is 200. Allowed values are
100, 200, 300, 400, 600 and 1200 pels/25.4 mm, with square (or equivalent) pels.
NOTE û The functional equivalence of inch-based and mm-based resolutions is maintained. For example, the 200 ╫ 200
*/
static
cmsBool IsITUFax(jpeg_saved_marker_ptr ptr)
{
while (ptr)
{
if (ptr -> marker == (JPEG_APP0 + 1) && ptr -> data_length > 5) {
const char* data = (const char*) ptr -> data;
if (strcmp(data, "G3FAX") == 0) return TRUE;
}
ptr = ptr -> next;
}
return FALSE;
}
// Save a ITU T.42/Fax marker with defaults on boundaries. This is the only mode we support right now.
static
void SetITUFax(j_compress_ptr cinfo)
{
unsigned char Marker[] = "G3FAX\x00\0x07\xCA\x00\xC8";
jpeg_write_marker(cinfo, (JPEG_APP0 + 1), Marker, 10);
}
// Build a profile for decoding ITU T.42/Fax JPEG streams.
// The profile has an additional ability in the input direction of
// gamut compress values between 85 < a < -85 and -75 < b < 125. This conforms
// the default range for ITU/T.42 -- See RFC 2301, section 6.2.3 for details
// L* = [0, 100]
// a* = [û85, 85]
// b* = [û75, 125]
// These functions does convert the encoding of ITUFAX to floating point
// and vice-versa. No gamut mapping is performed yet.
static
void ITU2Lab(const cmsUInt16Number In[3], cmsCIELab* Lab)
{
Lab -> L = (double) In[0] / 655.35;
Lab -> a = (double) 170.* (In[1] - 32768.) / 65535.;
Lab -> b = (double) 200.* (In[2] - 24576.) / 65535.;
}
static
void Lab2ITU(const cmsCIELab* Lab, cmsUInt16Number Out[3])
{
Out[0] = (cmsUInt16Number) floor((double) (Lab -> L / 100.)* 65535. );
Out[1] = (cmsUInt16Number) floor((double) (Lab -> a / 170.)* 65535. + 32768. );
Out[2] = (cmsUInt16Number) floor((double) (Lab -> b / 200.)* 65535. + 24576. );
}
// These are the samplers-- They are passed as callbacks to cmsStageSampleCLut16bit()
// then, cmsSample3DGrid() will sweel whole Lab gamut calling these functions
// once for each node. In[] will contain the Lab PCS value to convert to ITUFAX
// on PCS2ITU, or the ITUFAX value to convert to Lab in ITU2PCS
// You can change the number of sample points if desired, the algorithm will
// remain same. 33 points gives good accurancy, but you can reduce to 22 or less
// is space is critical
#define GRID_POINTS 33
static
int PCS2ITU(register const cmsUInt16Number In[], register cmsUInt16Number Out[], register void* Cargo)
{
cmsCIELab Lab;
cmsLabEncoded2Float(&Lab, In);
cmsDesaturateLab(&Lab, 85, -85, 125, -75); // This function does the necessary gamut remapping
Lab2ITU(&Lab, Out);
return TRUE;
UTILS_UNUSED_PARAMETER(Cargo);
}
static
int ITU2PCS( register const cmsUInt16Number In[], register cmsUInt16Number Out[], register void* Cargo)
{
cmsCIELab Lab;
ITU2Lab(In, &Lab);
cmsFloat2LabEncoded(Out, &Lab);
return TRUE;
UTILS_UNUSED_PARAMETER(Cargo);
}
// This function does create the virtual input profile, which decodes ITU to the profile connection space
static
cmsHPROFILE CreateITU2PCS_ICC(void)
{
cmsHPROFILE hProfile;
cmsPipeline* AToB0;
cmsStage* ColorMap;
AToB0 = cmsPipelineAlloc(0, 3, 3);
if (AToB0 == NULL) return NULL;
ColorMap = cmsStageAllocCLut16bit(0, GRID_POINTS, 3, 3, NULL);
if (ColorMap == NULL) return NULL;
cmsPipelineInsertStage(AToB0, cmsAT_BEGIN, ColorMap);
cmsStageSampleCLut16bit(ColorMap, ITU2PCS, NULL, 0);
hProfile = cmsCreateProfilePlaceholder(0);
if (hProfile == NULL) {
cmsPipelineFree(AToB0);
return NULL;
}
cmsWriteTag(hProfile, cmsSigAToB0Tag, AToB0);
cmsSetColorSpace(hProfile, cmsSigLabData);
cmsSetPCS(hProfile, cmsSigLabData);
cmsSetDeviceClass(hProfile, cmsSigColorSpaceClass);
cmsPipelineFree(AToB0);
return hProfile;
}
// This function does create the virtual output profile, with the necessary gamut mapping
static
cmsHPROFILE CreatePCS2ITU_ICC(void)
{
cmsHPROFILE hProfile;
cmsPipeline* BToA0;
cmsStage* ColorMap;
BToA0 = cmsPipelineAlloc(0, 3, 3);
if (BToA0 == NULL) return NULL;
ColorMap = cmsStageAllocCLut16bit(0, GRID_POINTS, 3, 3, NULL);
if (ColorMap == NULL) return NULL;
cmsPipelineInsertStage(BToA0, cmsAT_BEGIN, ColorMap);
cmsStageSampleCLut16bit(ColorMap, PCS2ITU, NULL, 0);
hProfile = cmsCreateProfilePlaceholder(0);
if (hProfile == NULL) {
cmsPipelineFree(BToA0);
return NULL;
}
cmsWriteTag(hProfile, cmsSigBToA0Tag, BToA0);
cmsSetColorSpace(hProfile, cmsSigLabData);
cmsSetPCS(hProfile, cmsSigLabData);
cmsSetDeviceClass(hProfile, cmsSigColorSpaceClass);
cmsPipelineFree(BToA0);
return hProfile;
}
#define PS_FIXED_TO_FLOAT(h, l) ((float) (h) + ((float) (l)/(1<<16)))
static
cmsBool ProcessPhotoshopAPP13(JOCTET FAR *data, int datalen)
{
int i;
for (i = 14; i < datalen; )
{
long len;
unsigned int type;
if (!(GETJOCTET(data[i] ) == 0x38 &&
GETJOCTET(data[i+1]) == 0x42 &&
GETJOCTET(data[i+2]) == 0x49 &&
GETJOCTET(data[i+3]) == 0x4D)) break; // Not recognized
i += 4; // identifying string
type = (unsigned int) (GETJOCTET(data[i]<<8) + GETJOCTET(data[i+1]));
i += 2; // resource type
i += GETJOCTET(data[i]) + ((GETJOCTET(data[i]) & 1) ? 1 : 2); // resource name
len = ((((GETJOCTET(data[i]<<8) + GETJOCTET(data[i+1]))<<8) +
GETJOCTET(data[i+2]))<<8) + GETJOCTET(data[i+3]);
i += 4; // Size
if (type == 0x03ED && len >= 16) {
Decompressor.X_density = (UINT16) PS_FIXED_TO_FLOAT(GETJOCTET(data[i]<<8) + GETJOCTET(data[i+1]),
GETJOCTET(data[i+2]<<8) + GETJOCTET(data[i+3]));
Decompressor.Y_density = (UINT16) PS_FIXED_TO_FLOAT(GETJOCTET(data[i+8]<<8) + GETJOCTET(data[i+9]),
GETJOCTET(data[i+10]<<8) + GETJOCTET(data[i+11]));
// Set the density unit to 1 since the
// Vertical and Horizontal resolutions
// are specified in Pixels per inch
Decompressor.density_unit = 0x01;
return TRUE;
}
i += len + ((len & 1) ? 1 : 0); // Alignment
}
return FALSE;
}
static
cmsBool HandlePhotoshopAPP13(jpeg_saved_marker_ptr ptr)
{
while (ptr) {
if (ptr -> marker == (JPEG_APP0 + 13) && ptr -> data_length > 9)
{
JOCTET FAR* data = ptr -> data;
if(GETJOCTET(data[0]) == 0x50 &&
GETJOCTET(data[1]) == 0x68 &&
GETJOCTET(data[2]) == 0x6F &&
GETJOCTET(data[3]) == 0x74 &&
GETJOCTET(data[4]) == 0x6F &&
GETJOCTET(data[5]) == 0x73 &&
GETJOCTET(data[6]) == 0x68 &&
GETJOCTET(data[7]) == 0x6F &&
GETJOCTET(data[8]) == 0x70) {
ProcessPhotoshopAPP13(data, ptr -> data_length);
return TRUE;
}
}
ptr = ptr -> next;
}
return FALSE;
}
typedef unsigned short uint16_t;
typedef unsigned char uint8_t;
typedef unsigned int uint32_t;
#define INTEL_BYTE_ORDER 0x4949
#define XRESOLUTION 0x011a
#define YRESOLUTION 0x011b
#define RESOLUTION_UNIT 0x128
// Read a 16-bit word
static
uint16_t read16(uint8_t* arr, int pos, int swapBytes)
{
uint8_t b1 = arr[pos];
uint8_t b2 = arr[pos+1];
return (swapBytes) ? ((b2 << 8) | b1) : ((b1 << 8) | b2);
}
// Read a 32-bit word
static
uint32_t read32(uint8_t* arr, int pos, int swapBytes)
{
if(!swapBytes) {
return (arr[pos] << 24) |
(arr[pos+1] << 16) |
(arr[pos+2] << 8) |
arr[pos+3];
}
return arr[pos] |
(arr[pos+1] << 8) |
(arr[pos+2] << 16) |
(arr[pos+3] << 24);
}
static
int read_tag(uint8_t* arr, int pos, int swapBytes, void* dest)
{
// Format should be 5 over here (rational)
uint32_t format = read16(arr, pos + 2, swapBytes);
// Components should be 1
uint32_t components = read32(arr, pos + 4, swapBytes);
// Points to the value
uint32_t offset;
// sanity
if (components != 1) return 0;
if (format == 3)
offset = pos + 8;
else
offset = read32(arr, pos + 8, swapBytes);
switch (format) {
case 5: // Rational
{
double num = read32(arr, offset, swapBytes);
double den = read32(arr, offset + 4, swapBytes);
*(double *) dest = num / den;
}
break;
case 3: // uint 16
*(int*) dest = read16(arr, offset, swapBytes);
break;
default: return 0;
}
return 1;
}
// Handler for EXIF data
static
cmsBool HandleEXIF(struct jpeg_decompress_struct* cinfo)
{
jpeg_saved_marker_ptr ptr;
uint32_t ifd_ofs;
int pos = 0, swapBytes = 0;
uint32_t i, numEntries;
double XRes = -1, YRes = -1;
int Unit = 2; // Inches
for (ptr = cinfo ->marker_list; ptr; ptr = ptr ->next) {
if ((ptr ->marker == JPEG_APP0+1) && ptr ->data_length > 6) {
JOCTET FAR* data = ptr -> data;
if (memcmp(data, "Exif\0\0", 6) == 0) {
data += 6; // Skip EXIF marker
// 8 byte TIFF header
// first two determine byte order
pos = 0;
if (read16(data, pos, 0) == INTEL_BYTE_ORDER) {
swapBytes = 1;
}
pos += 2;
// next two bytes are always 0x002A (TIFF version)
pos += 2;
// offset to Image File Directory (includes the previous 8 bytes)
ifd_ofs = read32(data, pos, swapBytes);
// Search the directory for resolution tags
numEntries = read16(data, ifd_ofs, swapBytes);
for (i=0; i < numEntries; i++) {
uint32_t entryOffset = ifd_ofs + 2 + (12 * i);
uint32_t tag = read16(data, entryOffset, swapBytes);
switch (tag) {
case RESOLUTION_UNIT:
if (!read_tag(data, entryOffset, swapBytes, &Unit)) return FALSE;
break;
case XRESOLUTION:
if (!read_tag(data, entryOffset, swapBytes, &XRes)) return FALSE;
break;
case YRESOLUTION:
if (!read_tag(data, entryOffset, swapBytes, &YRes)) return FALSE;
break;
default:;
}
}
// Proceed if all found
if (XRes != -1 && YRes != -1)
{
// 1 = None
// 2 = inches
// 3 = cm
switch (Unit) {
case 2:
cinfo ->X_density = (UINT16) floor(XRes + 0.5);
cinfo ->Y_density = (UINT16) floor(YRes + 0.5);
break;
case 1:
cinfo ->X_density = (UINT16) floor(XRes * 2.54 + 0.5);
cinfo ->Y_density = (UINT16) floor(YRes * 2.54 + 0.5);
break;
default: return FALSE;
}
cinfo ->density_unit = 1; /* 1 for dots/inch, or 2 for dots/cm.*/
}
}
}
}
return FALSE;
}
static
cmsBool OpenInput(const char* FileName)
{
int m;
lIsITUFax = FALSE;
InFile = fopen(FileName, "rb");
if (InFile == NULL) {
FatalError("Cannot open '%s'", FileName);
}
// Now we can initialize the JPEG decompression object.
Decompressor.err = jpeg_std_error(&ErrorHandler.pub);
ErrorHandler.pub.error_exit = my_error_exit;
ErrorHandler.pub.output_message = my_error_exit;
jpeg_create_decompress(&Decompressor);
jpeg_stdio_src(&Decompressor, InFile);
for (m = 0; m < 16; m++)
jpeg_save_markers(&Decompressor, JPEG_APP0 + m, 0xFFFF);
// setup_read_icc_profile(&Decompressor);
fseek(InFile, 0, SEEK_SET);
jpeg_read_header(&Decompressor, TRUE);
return TRUE;
}
static
cmsBool OpenOutput(const char* FileName)
{
OutFile = fopen(FileName, "wb");
if (OutFile == NULL) {
FatalError("Cannot create '%s'", FileName);
}
Compressor.err = jpeg_std_error(&ErrorHandler.pub);
ErrorHandler.pub.error_exit = my_error_exit;
ErrorHandler.pub.output_message = my_error_exit;
Compressor.input_components = Compressor.num_components = 4;
jpeg_create_compress(&Compressor);
jpeg_stdio_dest(&Compressor, OutFile);
return TRUE;
}
static
cmsBool Done(void)
{
jpeg_destroy_decompress(&Decompressor);
jpeg_destroy_compress(&Compressor);
return fclose(InFile) + fclose(OutFile);
}
// Build up the pixeltype descriptor
static
cmsUInt32Number GetInputPixelType(void)
{
int space, bps, extra, ColorChannels, Flavor;
lIsITUFax = IsITUFax(Decompressor.marker_list);
lIsPhotoshopApp13 = HandlePhotoshopAPP13(Decompressor.marker_list);
lIsEXIF = HandleEXIF(&Decompressor);
ColorChannels = Decompressor.num_components;
extra = 0; // Alpha = None
bps = 1; // 8 bits
Flavor = 0; // Vanilla
if (lIsITUFax) {
space = PT_Lab;
Decompressor.out_color_space = JCS_YCbCr; // Fake to don't touch
}
else
switch (Decompressor.jpeg_color_space) {
case JCS_GRAYSCALE: // monochrome
space = PT_GRAY;
Decompressor.out_color_space = JCS_GRAYSCALE;
break;
case JCS_RGB: // red/green/blue
space = PT_RGB;
Decompressor.out_color_space = JCS_RGB;
break;
case JCS_YCbCr: // Y/Cb/Cr (also known as YUV)
space = PT_RGB; // Let IJG code to do the conversion
Decompressor.out_color_space = JCS_RGB;
break;
case JCS_CMYK: // C/M/Y/K
space = PT_CMYK;
Decompressor.out_color_space = JCS_CMYK;
if (Decompressor.saw_Adobe_marker) // Adobe keeps CMYK inverted, so change flavor
Flavor = 1; // from vanilla to chocolate
break;
case JCS_YCCK: // Y/Cb/Cr/K
space = PT_CMYK;
Decompressor.out_color_space = JCS_CMYK;
if (Decompressor.saw_Adobe_marker) // ditto
Flavor = 1;
break;
default:
FatalError("Unsupported color space (0x%x)", Decompressor.jpeg_color_space);
return 0;
}
return (EXTRA_SH(extra)|CHANNELS_SH(ColorChannels)|BYTES_SH(bps)|COLORSPACE_SH(space)|FLAVOR_SH(Flavor));
}
// Rearrange pixel type to build output descriptor
static
cmsUInt32Number ComputeOutputFormatDescriptor(cmsUInt32Number dwInput, int OutColorSpace)
{
int IsPlanar = T_PLANAR(dwInput);
int Channels = 0;
int Flavor = 0;
switch (OutColorSpace) {
case PT_GRAY:
Channels = 1;
break;
case PT_RGB:
case PT_CMY:
case PT_Lab:
case PT_YUV:
case PT_YCbCr:
Channels = 3;
break;
case PT_CMYK:
if (Compressor.write_Adobe_marker) // Adobe keeps CMYK inverted, so change flavor to chocolate
Flavor = 1;
Channels = 4;
break;
default:
FatalError("Unsupported output color space");
}
return (COLORSPACE_SH(OutColorSpace)|PLANAR_SH(IsPlanar)|CHANNELS_SH(Channels)|BYTES_SH(1)|FLAVOR_SH(Flavor));
}
// Equivalence between ICC color spaces and lcms color spaces
static
int GetProfileColorSpace(cmsHPROFILE hProfile)
{
cmsColorSpaceSignature ProfileSpace = cmsGetColorSpace(hProfile);
return _cmsLCMScolorSpace(ProfileSpace);
}
static
int GetDevicelinkColorSpace(cmsHPROFILE hProfile)
{
cmsColorSpaceSignature ProfileSpace = cmsGetPCS(hProfile);
return _cmsLCMScolorSpace(ProfileSpace);
}
// From TRANSUPP
static
void jcopy_markers_execute(j_decompress_ptr srcinfo, j_compress_ptr dstinfo)
{
jpeg_saved_marker_ptr marker;
/* In the current implementation, we don't actually need to examine the
* option flag here; we just copy everything that got saved.
* But to avoid confusion, we do not output JFIF and Adobe APP14 markers
* if the encoder library already wrote one.
*/
for (marker = srcinfo->marker_list; marker != NULL; marker = marker->next) {
if (dstinfo->write_JFIF_header &&
marker->marker == JPEG_APP0 &&
marker->data_length >= 5 &&
GETJOCTET(marker->data[0]) == 0x4A &&
GETJOCTET(marker->data[1]) == 0x46 &&
GETJOCTET(marker->data[2]) == 0x49 &&
GETJOCTET(marker->data[3]) == 0x46 &&
GETJOCTET(marker->data[4]) == 0)
continue; /* reject duplicate JFIF */
if (dstinfo->write_Adobe_marker &&
marker->marker == JPEG_APP0+14 &&
marker->data_length >= 5 &&
GETJOCTET(marker->data[0]) == 0x41 &&
GETJOCTET(marker->data[1]) == 0x64 &&
GETJOCTET(marker->data[2]) == 0x6F &&
GETJOCTET(marker->data[3]) == 0x62 &&
GETJOCTET(marker->data[4]) == 0x65)
continue; /* reject duplicate Adobe */
jpeg_write_marker(dstinfo, marker->marker,
marker->data, marker->data_length);
}
}
static
void WriteOutputFields(int OutputColorSpace)
{
J_COLOR_SPACE in_space, jpeg_space;
int components;
switch (OutputColorSpace) {
case PT_GRAY: in_space = jpeg_space = JCS_GRAYSCALE;
components = 1;
break;
case PT_RGB: in_space = JCS_RGB;
jpeg_space = JCS_YCbCr;
components = 3;
break; // red/green/blue
case PT_YCbCr: in_space = jpeg_space = JCS_YCbCr;
components = 3;
break; // Y/Cb/Cr (also known as YUV)
case PT_CMYK: in_space = JCS_CMYK;
jpeg_space = JCS_YCCK;
components = 4;
break; // C/M/Y/components
case PT_Lab: in_space = jpeg_space = JCS_YCbCr;
components = 3;
break; // Fake to don't touch
default:
FatalError("Unsupported output color space");
return;
}
if (jpegQuality >= 100) {
// avoid destructive conversion when asking for lossless compression
jpeg_space = in_space;
}
Compressor.in_color_space = in_space;
Compressor.jpeg_color_space = jpeg_space;
Compressor.input_components = Compressor.num_components = components;
jpeg_set_defaults(&Compressor);
jpeg_set_colorspace(&Compressor, jpeg_space);
// Make sure to pass resolution through
if (OutputColorSpace == PT_CMYK)
Compressor.write_JFIF_header = 1;
// Avoid subsampling on high quality factor
jpeg_set_quality(&Compressor, jpegQuality, 1);
if (jpegQuality >= 70) {
int i;
for(i=0; i < Compressor.num_components; i++) {
Compressor.comp_info[i].h_samp_factor = 1;
Compressor.comp_info[i].v_samp_factor = 1;
}
}
}
static
void DoEmbedProfile(const char* ProfileFile)
{
FILE* f;
size_t size, EmbedLen;
cmsUInt8Number* EmbedBuffer;
f = fopen(ProfileFile, "rb");
if (f == NULL) return;
size = cmsfilelength(f);
EmbedBuffer = (cmsUInt8Number*) malloc(size + 1);
EmbedLen = fread(EmbedBuffer, 1, size, f);
fclose(f);
EmbedBuffer[EmbedLen] = 0;
write_icc_profile (&Compressor, EmbedBuffer, EmbedLen);
free(EmbedBuffer);
}
static
int DoTransform(cmsHTRANSFORM hXForm, int OutputColorSpace)
{
JSAMPROW ScanLineIn;
JSAMPROW ScanLineOut;
//Preserve resolution values from the original
// (Thanks to Robert Bergs for finding out this bug)
Compressor.density_unit = Decompressor.density_unit;
Compressor.X_density = Decompressor.X_density;
Compressor.Y_density = Decompressor.Y_density;
// Compressor.write_JFIF_header = 1;
jpeg_start_decompress(&Decompressor);
jpeg_start_compress(&Compressor, TRUE);
if (OutputColorSpace == PT_Lab)
SetITUFax(&Compressor);
// Embed the profile if needed
if (EmbedProfile && cOutProf)
DoEmbedProfile(cOutProf);
ScanLineIn = (JSAMPROW) malloc(Decompressor.output_width * Decompressor.num_components);
ScanLineOut = (JSAMPROW) malloc(Compressor.image_width * Compressor.num_components);
while (Decompressor.output_scanline <
Decompressor.output_height) {
jpeg_read_scanlines(&Decompressor, &ScanLineIn, 1);
cmsDoTransform(hXForm, ScanLineIn, ScanLineOut, Decompressor.output_width);
jpeg_write_scanlines(&Compressor, &ScanLineOut, 1);
}
free(ScanLineIn);
free(ScanLineOut);
jpeg_finish_decompress(&Decompressor);
jpeg_finish_compress(&Compressor);
return TRUE;
}
// Transform one image
static
int TransformImage(char *cDefInpProf, char *cOutProf)
{
cmsHPROFILE hIn, hOut, hProof;
cmsHTRANSFORM xform;
cmsUInt32Number wInput, wOutput;
int OutputColorSpace;
cmsUInt32Number dwFlags = 0;
cmsUInt32Number EmbedLen;
cmsUInt8Number* EmbedBuffer;
cmsSetAdaptationState(ObserverAdaptationState);
if (BlackPointCompensation) {
dwFlags |= cmsFLAGS_BLACKPOINTCOMPENSATION;
}
switch (PrecalcMode) {
case 0: dwFlags |= cmsFLAGS_NOOPTIMIZE; break;
case 2: dwFlags |= cmsFLAGS_HIGHRESPRECALC; break;
case 3: dwFlags |= cmsFLAGS_LOWRESPRECALC; break;
default:;
}
if (GamutCheck) {
dwFlags |= cmsFLAGS_GAMUTCHECK;
cmsSetAlarmCodes(Alarm);
}
// Take input color space
wInput = GetInputPixelType();
if (lIsDeviceLink) {
hIn = cmsOpenProfileFromFile(cDefInpProf, "r");
hOut = NULL;
hProof = NULL;
}
else {
if (!IgnoreEmbedded && read_icc_profile(&Decompressor, &EmbedBuffer, &EmbedLen))
{
hIn = cmsOpenProfileFromMem(EmbedBuffer, EmbedLen);
if (Verbose) {
fprintf(stdout, " (Embedded profile found)\n");
PrintProfileInformation(hIn);
fflush(stdout);
}
if (hIn != NULL && SaveEmbedded != NULL)
SaveMemoryBlock(EmbedBuffer, EmbedLen, SaveEmbedded);
free(EmbedBuffer);
}
else
{
// Default for ITU/Fax
if (cDefInpProf == NULL && T_COLORSPACE(wInput) == PT_Lab)
cDefInpProf = "*Lab";
if (cDefInpProf != NULL && cmsstrcasecmp(cDefInpProf, "*lab") == 0)
hIn = CreateITU2PCS_ICC();
else
hIn = OpenStockProfile(0, cDefInpProf);
}
if (cOutProf != NULL && cmsstrcasecmp(cOutProf, "*lab") == 0)
hOut = CreatePCS2ITU_ICC();
else
hOut = OpenStockProfile(0, cOutProf);
hProof = NULL;
if (cProofing != NULL) {
hProof = OpenStockProfile(0, cProofing);
if (hProof == NULL) {
FatalError("Proofing profile couldn't be read.");
}
dwFlags |= cmsFLAGS_SOFTPROOFING;
}
}
if (!hIn)
FatalError("Input profile couldn't be read.");
if (!hOut)
FatalError("Output profile couldn't be read.");
// Assure both, input profile and input JPEG are on same colorspace
if (cmsGetColorSpace(hIn) != _cmsICCcolorSpace(T_COLORSPACE(wInput)))
FatalError("Input profile is not operating in proper color space");
// Output colorspace is given by output profile
if (lIsDeviceLink) {
OutputColorSpace = GetDevicelinkColorSpace(hIn);
}
else {
OutputColorSpace = GetProfileColorSpace(hOut);
}
jpeg_copy_critical_parameters(&Decompressor, &Compressor);
WriteOutputFields(OutputColorSpace);
wOutput = ComputeOutputFormatDescriptor(wInput, OutputColorSpace);
xform = cmsCreateProofingTransform(hIn, wInput,
hOut, wOutput,
hProof, Intent,
ProofingIntent, dwFlags);
if (xform == NULL)
FatalError("Cannot transform by using the profiles");
DoTransform(xform, OutputColorSpace);
jcopy_markers_execute(&Decompressor, &Compressor);
cmsDeleteTransform(xform);
cmsCloseProfile(hIn);
cmsCloseProfile(hOut);
if (hProof) cmsCloseProfile(hProof);
return 1;
}
// Simply print help
static
void Help(int level)
{
fprintf(stderr, "little cms ICC profile applier for JPEG - v3.2 [LittleCMS %2.2f]\n\n", LCMS_VERSION / 1000.0);
switch(level) {
default:
case 0:
fprintf(stderr, "usage: jpgicc [flags] input.jpg output.jpg\n");
fprintf(stderr, "\nflags:\n\n");
fprintf(stderr, "%cv - Verbose\n", SW);
fprintf(stderr, "%ci<profile> - Input profile (defaults to sRGB)\n", SW);
fprintf(stderr, "%co<profile> - Output profile (defaults to sRGB)\n", SW);
PrintRenderingIntents();
fprintf(stderr, "%cb - Black point compensation\n", SW);
fprintf(stderr, "%cd<0..1> - Observer adaptation state (abs.col. only)\n", SW);
fprintf(stderr, "%cn - Ignore embedded profile\n", SW);
fprintf(stderr, "%ce - Embed destination profile\n", SW);
fprintf(stderr, "%cs<new profile> - Save embedded profile as <new profile>\n", SW);
fprintf(stderr, "\n");
fprintf(stderr, "%cc<0,1,2,3> - Precalculates transform (0=Off, 1=Normal, 2=Hi-res, 3=LoRes) [defaults to 1]\n", SW);
fprintf(stderr, "\n");
fprintf(stderr, "%cp<profile> - Soft proof profile\n", SW);
fprintf(stderr, "%cm<0,1,2,3> - SoftProof intent\n", SW);
fprintf(stderr, "%cg - Marks out-of-gamut colors on softproof\n", SW);
fprintf(stderr, "%c!<r>,<g>,<b> - Out-of-gamut marker channel values\n", SW);
fprintf(stderr, "\n");
fprintf(stderr, "%cq<0..100> - Output JPEG quality\n", SW);
fprintf(stderr, "\n");
fprintf(stderr, "%ch<0,1,2,3> - More help\n", SW);
break;
case 1:
fprintf(stderr, "Examples:\n\n"
"To color correct from scanner to sRGB:\n"
"\tjpgicc %ciscanner.icm in.jpg out.jpg\n"
"To convert from monitor1 to monitor2:\n"
"\tjpgicc %cimon1.icm %comon2.icm in.jpg out.jpg\n"
"To make a CMYK separation:\n"
"\tjpgicc %coprinter.icm inrgb.jpg outcmyk.jpg\n"
"To recover sRGB from a CMYK separation:\n"
"\tjpgicc %ciprinter.icm incmyk.jpg outrgb.jpg\n"
"To convert from CIELab ITU/Fax JPEG to sRGB\n"
"\tjpgicc in.jpg out.jpg\n\n",
SW, SW, SW, SW, SW);
break;
case 2:
PrintBuiltins();
break;
case 3:
fprintf(stderr, "This program is intended to be a demo of the little cms\n"
"engine. Both lcms and this program are freeware. You can\n"
"obtain both in source code at http://www.littlecms.com\n"
"For suggestions, comments, bug reports etc. send mail to\n"
"marti@littlecms.com\n\n");
break;
}
exit(0);
}
// The toggles stuff
static
void HandleSwitches(int argc, char *argv[])
{
int s;
while ((s=xgetopt(argc,argv,"bBnNvVGgh:H:i:I:o:O:P:p:t:T:c:C:Q:q:M:m:L:l:eEs:S:!:D:d:")) != EOF) {
switch (s)
{
case 'b':
case 'B':
BlackPointCompensation = TRUE;
break;
case 'd':
case 'D': ObserverAdaptationState = atof(xoptarg);
if (ObserverAdaptationState < 0 ||
ObserverAdaptationState > 1.0)
FatalError("Adaptation state should be 0..1");
break;
case 'v':
case 'V':
Verbose = TRUE;
break;
case 'i':
case 'I':
if (lIsDeviceLink)
FatalError("Device-link already specified");
cInpProf = xoptarg;
break;
case 'o':
case 'O':
if (lIsDeviceLink)
FatalError("Device-link already specified");
cOutProf = xoptarg;
break;
case 'l':
case 'L':
if (cInpProf != NULL || cOutProf != NULL)
FatalError("input/output profiles already specified");
cInpProf = xoptarg;
lIsDeviceLink = TRUE;
break;
case 'p':
case 'P':
cProofing = xoptarg;
break;
case 't':
case 'T':
Intent = atoi(xoptarg);
break;
case 'N':
case 'n':
IgnoreEmbedded = TRUE;
break;
case 'e':
case 'E':
EmbedProfile = TRUE;
break;
case 'g':
case 'G':
GamutCheck = TRUE;
break;
case 'c':
case 'C':
PrecalcMode = atoi(xoptarg);
if (PrecalcMode < 0 || PrecalcMode > 2)
FatalError("Unknown precalc mode '%d'", PrecalcMode);
break;
case 'H':
case 'h': {
int a = atoi(xoptarg);
Help(a);
}
break;
case 'q':
case 'Q':
jpegQuality = atoi(xoptarg);
if (jpegQuality > 100) jpegQuality = 100;
if (jpegQuality < 0) jpegQuality = 0;
break;
case 'm':
case 'M':
ProofingIntent = atoi(xoptarg);
break;
case 's':
case 'S': SaveEmbedded = xoptarg;
break;
case '!':
if (sscanf(xoptarg, "%hu,%hu,%hu", &Alarm[0], &Alarm[1], &Alarm[2]) == 3) {
int i;
for (i=0; i < 3; i++) {
Alarm[i] = (Alarm[i] << 8) | Alarm[i];
}
}
break;
default:
FatalError("Unknown option - run without args to see valid ones");
}
}
}
int main(int argc, char* argv[])
{
InitUtils("jpgicc");
HandleSwitches(argc, argv);
if ((argc - xoptind) != 2) {
Help(0);
}
OpenInput(argv[xoptind]);
OpenOutput(argv[xoptind+1]);
TransformImage(cInpProf, cOutProf);
if (Verbose) { fprintf(stdout, "\n"); fflush(stdout); }
Done();
return 0;
}
|
29 | ./little-cms/utils/jpgicc/iccjpeg.c | /*
* iccprofile.c
*
* This file provides code to read and write International Color Consortium
* (ICC) device profiles embedded in JFIF JPEG image files. The ICC has
* defined a standard format for including such data in JPEG "APP2" markers.
* The code given here does not know anything about the internal structure
* of the ICC profile data; it just knows how to put the profile data into
* a JPEG file being written, or get it back out when reading.
*
* This code depends on new features added to the IJG JPEG library as of
* IJG release 6b; it will not compile or work with older IJG versions.
*
* NOTE: this code would need surgery to work on 16-bit-int machines
* with ICC profiles exceeding 64K bytes in size. If you need to do that,
* change all the "unsigned int" variables to "INT32". You'll also need
* to find a malloc() replacement that can allocate more than 64K.
*/
#include "iccjpeg.h"
#include <stdlib.h> /* define malloc() */
/*
* Since an ICC profile can be larger than the maximum size of a JPEG marker
* (64K), we need provisions to split it into multiple markers. The format
* defined by the ICC specifies one or more APP2 markers containing the
* following data:
* Identifying string ASCII "ICC_PROFILE\0" (12 bytes)
* Marker sequence number 1 for first APP2, 2 for next, etc (1 byte)
* Number of markers Total number of APP2's used (1 byte)
* Profile data (remainder of APP2 data)
* Decoders should use the marker sequence numbers to reassemble the profile,
* rather than assuming that the APP2 markers appear in the correct sequence.
*/
#define ICC_MARKER (JPEG_APP0 + 2) /* JPEG marker code for ICC */
#define ICC_OVERHEAD_LEN 14 /* size of non-profile data in APP2 */
#define MAX_BYTES_IN_MARKER 65533 /* maximum data len of a JPEG marker */
#define MAX_DATA_BYTES_IN_MARKER (MAX_BYTES_IN_MARKER - ICC_OVERHEAD_LEN)
/*
* This routine writes the given ICC profile data into a JPEG file.
* It *must* be called AFTER calling jpeg_start_compress() and BEFORE
* the first call to jpeg_write_scanlines().
* (This ordering ensures that the APP2 marker(s) will appear after the
* SOI and JFIF or Adobe markers, but before all else.)
*/
void
write_icc_profile (j_compress_ptr cinfo,
const JOCTET *icc_data_ptr,
unsigned int icc_data_len)
{
unsigned int num_markers; /* total number of markers we'll write */
int cur_marker = 1; /* per spec, counting starts at 1 */
unsigned int length; /* number of bytes to write in this marker */
/* Calculate the number of markers we'll need, rounding up of course */
num_markers = icc_data_len / MAX_DATA_BYTES_IN_MARKER;
if (num_markers * MAX_DATA_BYTES_IN_MARKER != icc_data_len)
num_markers++;
while (icc_data_len > 0) {
/* length of profile to put in this marker */
length = icc_data_len;
if (length > MAX_DATA_BYTES_IN_MARKER)
length = MAX_DATA_BYTES_IN_MARKER;
icc_data_len -= length;
/* Write the JPEG marker header (APP2 code and marker length) */
jpeg_write_m_header(cinfo, ICC_MARKER,
(unsigned int) (length + ICC_OVERHEAD_LEN));
/* Write the marker identifying string "ICC_PROFILE" (null-terminated).
* We code it in this less-than-transparent way so that the code works
* even if the local character set is not ASCII.
*/
jpeg_write_m_byte(cinfo, 0x49);
jpeg_write_m_byte(cinfo, 0x43);
jpeg_write_m_byte(cinfo, 0x43);
jpeg_write_m_byte(cinfo, 0x5F);
jpeg_write_m_byte(cinfo, 0x50);
jpeg_write_m_byte(cinfo, 0x52);
jpeg_write_m_byte(cinfo, 0x4F);
jpeg_write_m_byte(cinfo, 0x46);
jpeg_write_m_byte(cinfo, 0x49);
jpeg_write_m_byte(cinfo, 0x4C);
jpeg_write_m_byte(cinfo, 0x45);
jpeg_write_m_byte(cinfo, 0x0);
/* Add the sequencing info */
jpeg_write_m_byte(cinfo, cur_marker);
jpeg_write_m_byte(cinfo, (int) num_markers);
/* Add the profile data */
while (length--) {
jpeg_write_m_byte(cinfo, *icc_data_ptr);
icc_data_ptr++;
}
cur_marker++;
}
}
/*
* Prepare for reading an ICC profile
*/
void
setup_read_icc_profile (j_decompress_ptr cinfo)
{
/* Tell the library to keep any APP2 data it may find */
jpeg_save_markers(cinfo, ICC_MARKER, 0xFFFF);
}
/*
* Handy subroutine to test whether a saved marker is an ICC profile marker.
*/
static boolean
marker_is_icc (jpeg_saved_marker_ptr marker)
{
return
marker->marker == ICC_MARKER &&
marker->data_length >= ICC_OVERHEAD_LEN &&
/* verify the identifying string */
GETJOCTET(marker->data[0]) == 0x49 &&
GETJOCTET(marker->data[1]) == 0x43 &&
GETJOCTET(marker->data[2]) == 0x43 &&
GETJOCTET(marker->data[3]) == 0x5F &&
GETJOCTET(marker->data[4]) == 0x50 &&
GETJOCTET(marker->data[5]) == 0x52 &&
GETJOCTET(marker->data[6]) == 0x4F &&
GETJOCTET(marker->data[7]) == 0x46 &&
GETJOCTET(marker->data[8]) == 0x49 &&
GETJOCTET(marker->data[9]) == 0x4C &&
GETJOCTET(marker->data[10]) == 0x45 &&
GETJOCTET(marker->data[11]) == 0x0;
}
/*
* See if there was an ICC profile in the JPEG file being read;
* if so, reassemble and return the profile data.
*
* TRUE is returned if an ICC profile was found, FALSE if not.
* If TRUE is returned, *icc_data_ptr is set to point to the
* returned data, and *icc_data_len is set to its length.
*
* IMPORTANT: the data at **icc_data_ptr has been allocated with malloc()
* and must be freed by the caller with free() when the caller no longer
* needs it. (Alternatively, we could write this routine to use the
* IJG library's memory allocator, so that the data would be freed implicitly
* at jpeg_finish_decompress() time. But it seems likely that many apps
* will prefer to have the data stick around after decompression finishes.)
*
* NOTE: if the file contains invalid ICC APP2 markers, we just silently
* return FALSE. You might want to issue an error message instead.
*/
boolean
read_icc_profile (j_decompress_ptr cinfo,
JOCTET **icc_data_ptr,
unsigned int *icc_data_len)
{
jpeg_saved_marker_ptr marker;
int num_markers = 0;
int seq_no;
JOCTET *icc_data;
unsigned int total_length;
#define MAX_SEQ_NO 255 /* sufficient since marker numbers are bytes */
char marker_present[MAX_SEQ_NO+1]; /* 1 if marker found */
unsigned int data_length[MAX_SEQ_NO+1]; /* size of profile data in marker */
unsigned int data_offset[MAX_SEQ_NO+1]; /* offset for data in marker */
*icc_data_ptr = NULL; /* avoid confusion if FALSE return */
*icc_data_len = 0;
/* This first pass over the saved markers discovers whether there are
* any ICC markers and verifies the consistency of the marker numbering.
*/
for (seq_no = 1; seq_no <= MAX_SEQ_NO; seq_no++)
marker_present[seq_no] = 0;
for (marker = cinfo->marker_list; marker != NULL; marker = marker->next) {
if (marker_is_icc(marker)) {
if (num_markers == 0)
num_markers = GETJOCTET(marker->data[13]);
else if (num_markers != GETJOCTET(marker->data[13]))
return FALSE; /* inconsistent num_markers fields */
seq_no = GETJOCTET(marker->data[12]);
if (seq_no <= 0 || seq_no > num_markers)
return FALSE; /* bogus sequence number */
if (marker_present[seq_no])
return FALSE; /* duplicate sequence numbers */
marker_present[seq_no] = 1;
data_length[seq_no] = marker->data_length - ICC_OVERHEAD_LEN;
}
}
if (num_markers == 0)
return FALSE;
/* Check for missing markers, count total space needed,
* compute offset of each marker's part of the data.
*/
total_length = 0;
for (seq_no = 1; seq_no <= num_markers; seq_no++) {
if (marker_present[seq_no] == 0)
return FALSE; /* missing sequence number */
data_offset[seq_no] = total_length;
total_length += data_length[seq_no];
}
if (total_length <= 0)
return FALSE; /* found only empty markers? */
/* Allocate space for assembled data */
icc_data = (JOCTET *) malloc(total_length * sizeof(JOCTET));
if (icc_data == NULL)
return FALSE; /* oops, out of memory */
/* and fill it in */
for (marker = cinfo->marker_list; marker != NULL; marker = marker->next) {
if (marker_is_icc(marker)) {
JOCTET FAR *src_ptr;
JOCTET *dst_ptr;
unsigned int length;
seq_no = GETJOCTET(marker->data[12]);
dst_ptr = icc_data + data_offset[seq_no];
src_ptr = marker->data + ICC_OVERHEAD_LEN;
length = data_length[seq_no];
while (length--) {
*dst_ptr++ = *src_ptr++;
}
}
}
*icc_data_ptr = icc_data;
*icc_data_len = total_length;
return TRUE;
}
|
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