Commit message: Validate UTF8 in xmlEncodeEntities

Code is currently assuming UTF-8 without validating. Truncated UTF-8
input can cause out-of-bounds array access.

Adds further checks to partial fix in 50f06b3e.

Fixes #178
CVE: CVE-2021-3517
CWE: CWE-787
Vulnerability description: There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker who is able to supply a crafted file to be processed by an application linked with the affected functionality of libxml2 could trigger an out-of-bounds read. The most likely impact of this flaw is to application availability, with some potential impact to confidentiality and integrity if an attacker is able to use memory information to further exploit the application.

Project: libxml2
File: entities.c

xmlGetDtdEntity(xmlDocPtr doc, const xmlChar *name) {
    xmlEntitiesTablePtr table;

    if (doc == NULL)
	return(NULL);
    if ((doc->extSubset != NULL) && (doc->extSubset->entities != NULL)) {
	table = (xmlEntitiesTablePtr) doc->extSubset->entities;
	return(xmlGetEntityFromTable(table, name));
    }
    return(NULL);
}

Project: libxml2
File: entities.c

xmlCopyEntity(void *payload, const xmlChar *name ATTRIBUTE_UNUSED) {
    xmlEntityPtr ent = (xmlEntityPtr) payload;
    xmlEntityPtr cur;

    cur = (xmlEntityPtr) xmlMalloc(sizeof(xmlEntity));
    if (cur == NULL) {
        xmlEntitiesErrMemory("xmlCopyEntity:: malloc failed");
	return(NULL);
    }
    memset(cur, 0, sizeof(xmlEntity));
    cur->type = XML_ENTITY_DECL;

    cur->etype = ent->etype;
    if (ent->name != NULL)
	cur->name = xmlStrdup(ent->name);
    if (ent->ExternalID != NULL)
	cur->ExternalID = xmlStrdup(ent->ExternalID);
    if (ent->SystemID != NULL)
	cur->SystemID = xmlStrdup(ent->SystemID);
    if (ent->content != NULL)
	cur->content = xmlStrdup(ent->content);
    if (ent->orig != NULL)
	cur->orig = xmlStrdup(ent->orig);
    if (ent->URI != NULL)
	cur->URI = xmlStrdup(ent->URI);
    return(cur);
}

Project: libxml2
File: entities.c

xmlGetPredefinedEntity(const xmlChar *name) {
    if (name == NULL) return(NULL);
    switch (name[0]) {
        case 'l':
	    if (xmlStrEqual(name, BAD_CAST "lt"))
	        return(&xmlEntityLt);
	    break;
        case 'g':
	    if (xmlStrEqual(name, BAD_CAST "gt"))
	        return(&xmlEntityGt);
	    break;
        case 'a':
	    if (xmlStrEqual(name, BAD_CAST "amp"))
	        return(&xmlEntityAmp);
	    if (xmlStrEqual(name, BAD_CAST "apos"))
	        return(&xmlEntityApos);
	    break;
        case 'q':
	    if (xmlStrEqual(name, BAD_CAST "quot"))
	        return(&xmlEntityQuot);
	    break;
	default:
	    break;
    }
    return(NULL);
}

Project: libxml2
File: entities.c

xmlDumpEntityDecl(xmlBufferPtr buf, xmlEntityPtr ent) {
    if ((buf == NULL) || (ent == NULL)) return;
    switch (ent->etype) {
	case XML_INTERNAL_GENERAL_ENTITY:
	    xmlBufferWriteChar(buf, "<!ENTITY ");
	    xmlBufferWriteCHAR(buf, ent->name);
	    xmlBufferWriteChar(buf, " ");
	    if (ent->orig != NULL)
		xmlBufferWriteQuotedString(buf, ent->orig);
	    else
		xmlDumpEntityContent(buf, ent->content);
	    xmlBufferWriteChar(buf, ">\n");
	    break;
	case XML_EXTERNAL_GENERAL_PARSED_ENTITY:
	    xmlBufferWriteChar(buf, "<!ENTITY ");
	    xmlBufferWriteCHAR(buf, ent->name);
	    if (ent->ExternalID != NULL) {
		 xmlBufferWriteChar(buf, " PUBLIC ");
		 xmlBufferWriteQuotedString(buf, ent->ExternalID);
		 xmlBufferWriteChar(buf, " ");
		 xmlBufferWriteQuotedString(buf, ent->SystemID);
	    } else {
		 xmlBufferWriteChar(buf, " SYSTEM ");
		 xmlBufferWriteQuotedString(buf, ent->SystemID);
	    }
	    xmlBufferWriteChar(buf, ">\n");
	    break;
	case XML_EXTERNAL_GENERAL_UNPARSED_ENTITY:
	    xmlBufferWriteChar(buf, "<!ENTITY ");
	    xmlBufferWriteCHAR(buf, ent->name);
	    if (ent->ExternalID != NULL) {
		 xmlBufferWriteChar(buf, " PUBLIC ");
		 xmlBufferWriteQuotedString(buf, ent->ExternalID);
		 xmlBufferWriteChar(buf, " ");
		 xmlBufferWriteQuotedString(buf, ent->SystemID);
	    } else {
		 xmlBufferWriteChar(buf, " SYSTEM ");
		 xmlBufferWriteQuotedString(buf, ent->SystemID);
	    }
	    if (ent->content != NULL) { /* Should be true ! */
		xmlBufferWriteChar(buf, " NDATA ");
		if (ent->orig != NULL)
		    xmlBufferWriteCHAR(buf, ent->orig);
		else
		    xmlBufferWriteCHAR(buf, ent->content);
	    }
	    xmlBufferWriteChar(buf, ">\n");
	    break;
	case XML_INTERNAL_PARAMETER_ENTITY:
	    xmlBufferWriteChar(buf, "<!ENTITY % ");
	    xmlBufferWriteCHAR(buf, ent->name);
	    xmlBufferWriteChar(buf, " ");
	    if (ent->orig == NULL)
		xmlDumpEntityContent(buf, ent->content);
	    else
		xmlBufferWriteQuotedString(buf, ent->orig);
	    xmlBufferWriteChar(buf, ">\n");
	    break;
	case XML_EXTERNAL_PARAMETER_ENTITY:
	    xmlBufferWriteChar(buf, "<!ENTITY % ");
	    xmlBufferWriteCHAR(buf, ent->name);
	    if (ent->ExternalID != NULL) {
		 xmlBufferWriteChar(buf, " PUBLIC ");
		 xmlBufferWriteQuotedString(buf, ent->ExternalID);
		 xmlBufferWriteChar(buf, " ");
		 xmlBufferWriteQuotedString(buf, ent->SystemID);
	    } else {
		 xmlBufferWriteChar(buf, " SYSTEM ");
		 xmlBufferWriteQuotedString(buf, ent->SystemID);
	    }
	    xmlBufferWriteChar(buf, ">\n");
	    break;
	default:
	    xmlEntitiesErr(XML_DTD_UNKNOWN_ENTITY,
		"xmlDumpEntitiesDecl: internal: unknown type entity type");
    }
}

Project: libxml2
File: entities.c

xmlGetParameterEntity(xmlDocPtr doc, const xmlChar *name) {
    xmlEntitiesTablePtr table;
    xmlEntityPtr ret;

    if (doc == NULL)
	return(NULL);
    if ((doc->intSubset != NULL) && (doc->intSubset->pentities != NULL)) {
	table = (xmlEntitiesTablePtr) doc->intSubset->pentities;
	ret = xmlGetEntityFromTable(table, name);
	if (ret != NULL)
	    return(ret);
    }
    if ((doc->extSubset != NULL) && (doc->extSubset->pentities != NULL)) {
	table = (xmlEntitiesTablePtr) doc->extSubset->pentities;
	return(xmlGetEntityFromTable(table, name));
    }
    return(NULL);
}

Project: libxml2
File: entities.c

xmlFreeEntity(xmlEntityPtr entity)
{
    xmlDictPtr dict = NULL;

    if (entity == NULL)
        return;

    if (entity->doc != NULL)
        dict = entity->doc->dict;


    if ((entity->children) && (entity->owner == 1) &&
        (entity == (xmlEntityPtr) entity->children->parent))
        xmlFreeNodeList(entity->children);
    if (dict != NULL) {
        if ((entity->name != NULL) && (!xmlDictOwns(dict, entity->name)))
            xmlFree((char *) entity->name);
        if ((entity->ExternalID != NULL) &&
	    (!xmlDictOwns(dict, entity->ExternalID)))
            xmlFree((char *) entity->ExternalID);
        if ((entity->SystemID != NULL) &&
	    (!xmlDictOwns(dict, entity->SystemID)))
            xmlFree((char *) entity->SystemID);
        if ((entity->URI != NULL) && (!xmlDictOwns(dict, entity->URI)))
            xmlFree((char *) entity->URI);
        if ((entity->content != NULL)
            && (!xmlDictOwns(dict, entity->content)))
            xmlFree((char *) entity->content);
        if ((entity->orig != NULL) && (!xmlDictOwns(dict, entity->orig)))
            xmlFree((char *) entity->orig);
    } else {
        if (entity->name != NULL)
            xmlFree((char *) entity->name);
        if (entity->ExternalID != NULL)
            xmlFree((char *) entity->ExternalID);
        if (entity->SystemID != NULL)
            xmlFree((char *) entity->SystemID);
        if (entity->URI != NULL)
            xmlFree((char *) entity->URI);
        if (entity->content != NULL)
            xmlFree((char *) entity->content);
        if (entity->orig != NULL)
            xmlFree((char *) entity->orig);
    }
    xmlFree(entity);
}

Project: libxml2
File: entities.c

xmlEncodeEntitiesInternal(xmlDocPtr doc, const xmlChar *input, int attr) {
    const xmlChar *cur = input;
    xmlChar *buffer = NULL;
    xmlChar *out = NULL;
    size_t buffer_size = 0;
    int html = 0;

    if (input == NULL) return(NULL);
    if (doc != NULL)
        html = (doc->type == XML_HTML_DOCUMENT_NODE);

    /*
     * allocate an translation buffer.
     */
    buffer_size = 1000;
    buffer = (xmlChar *) xmlMalloc(buffer_size * sizeof(xmlChar));
    if (buffer == NULL) {
        xmlEntitiesErrMemory("xmlEncodeEntities: malloc failed");
	return(NULL);
    }
    out = buffer;

    while (*cur != '\0') {
        size_t indx = out - buffer;
        if (indx + 100 > buffer_size) {

	    growBufferReentrant();
	    out = &buffer[indx];
	}

	/*
	 * By default one have to encode at least '<', '>', '"' and '&' !
	 */
	if (*cur == '<') {
	    const xmlChar *end;

	    /*
	     * Special handling of server side include in HTML attributes
	     */
	    if (html && attr &&
	        (cur[1] == '!') && (cur[2] == '-') && (cur[3] == '-') &&
	        ((end = xmlStrstr(cur, BAD_CAST "-->")) != NULL)) {
	        while (cur != end) {
		    *out++ = *cur++;
		    indx = out - buffer;
		    if (indx + 100 > buffer_size) {
			growBufferReentrant();
			out = &buffer[indx];
		    }
		}
		*out++ = *cur++;
		*out++ = *cur++;
		*out++ = *cur++;
		continue;
	    }
	    *out++ = '&';
	    *out++ = 'l';
	    *out++ = 't';
	    *out++ = ';';
	} else if (*cur == '>') {
	    *out++ = '&';
	    *out++ = 'g';
	    *out++ = 't';
	    *out++ = ';';
	} else if (*cur == '&') {
	    /*
	     * Special handling of &{...} construct from HTML 4, see
	     * http://www.w3.org/TR/html401/appendix/notes.html#h-B.7.1
	     */
	    if (html && attr && (cur[1] == '{') &&
	        (strchr((const char *) cur, '}'))) {
	        while (*cur != '}') {
		    *out++ = *cur++;
		    indx = out - buffer;
		    if (indx + 100 > buffer_size) {
			growBufferReentrant();
			out = &buffer[indx];
		    }
		}
		*out++ = *cur++;
		continue;
	    }
	    *out++ = '&';
	    *out++ = 'a';
	    *out++ = 'm';
	    *out++ = 'p';
	    *out++ = ';';
	} else if (((*cur >= 0x20) && (*cur < 0x80)) ||
	    (*cur == '\n') || (*cur == '\t') || ((html) && (*cur == '\r'))) {
	    /*
	     * default case, just copy !
	     */
	    *out++ = *cur;
	} else if (*cur >= 0x80) {
	    if (((doc != NULL) && (doc->encoding != NULL)) || (html)) {
		/*
		 * Bjørn Reese <br@sseusa.com> provided the patch
	        xmlChar xc;
	        xc = (*cur & 0x3F) << 6;
	        if (cur[1] != 0) {
		    xc += *(++cur) & 0x3F;
		    *out++ = xc;
	        } else
		 */
		*out++ = *cur;
	    } else {
		/*
		 * We assume we have UTF-8 input.
		 * It must match either:
		 *   110xxxxx 10xxxxxx
		 *   1110xxxx 10xxxxxx 10xxxxxx
		 *   11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
		 * That is:
		 *   cur[0] is 11xxxxxx
		 *   cur[1] is 10xxxxxx
		 *   cur[2] is 10xxxxxx if cur[0] is 111xxxxx
		 *   cur[3] is 10xxxxxx if cur[0] is 1111xxxx
		 *   cur[0] is not 11111xxx
		 */
		char buf[11], *ptr;
		int val = 0, l = 1;

		if (((cur[0] & 0xC0) != 0xC0) ||
		    ((cur[1] & 0xC0) != 0x80) ||
		    (((cur[0] & 0xE0) == 0xE0) && ((cur[2] & 0xC0) != 0x80)) ||
		    (((cur[0] & 0xF0) == 0xF0) && ((cur[3] & 0xC0) != 0x80)) ||
		    (((cur[0] & 0xF8) == 0xF8))) {
		    xmlEntitiesErr(XML_CHECK_NOT_UTF8,
			    "xmlEncodeEntities: input not UTF-8");
		    if (doc != NULL)
			doc->encoding = xmlStrdup(BAD_CAST "ISO-8859-1");
		    snprintf(buf, sizeof(buf), "&#%d;", *cur);
		    buf[sizeof(buf) - 1] = 0;
		    ptr = buf;
		    while (*ptr != 0) *out++ = *ptr++;
		    cur++;
		    continue;
		} else if (*cur < 0xE0) {
                    val = (cur[0]) & 0x1F;
		    val <<= 6;
		    val |= (cur[1]) & 0x3F;
		    l = 2;
		} else if (*cur < 0xF0) {
                    val = (cur[0]) & 0x0F;
		    val <<= 6;
		    val |= (cur[1]) & 0x3F;
		    val <<= 6;
		    val |= (cur[2]) & 0x3F;
		    l = 3;
		} else if (*cur < 0xF8) {
                    val = (cur[0]) & 0x07;
		    val <<= 6;
		    val |= (cur[1]) & 0x3F;
		    val <<= 6;
		    val |= (cur[2]) & 0x3F;
		    val <<= 6;
		    val |= (cur[3]) & 0x3F;
		    l = 4;
		}
		if ((l == 1) || (!IS_CHAR(val))) {
		    xmlEntitiesErr(XML_ERR_INVALID_CHAR,
			"xmlEncodeEntities: char out of range\n");
		    if (doc != NULL)
			doc->encoding = xmlStrdup(BAD_CAST "ISO-8859-1");
		    snprintf(buf, sizeof(buf), "&#%d;", *cur);
		    buf[sizeof(buf) - 1] = 0;
		    ptr = buf;
		    while (*ptr != 0) *out++ = *ptr++;
		    cur++;
		    continue;
		}
		/*
		 * We could do multiple things here. Just save as a char ref
		 */
		snprintf(buf, sizeof(buf), "&#x%X;", val);
		buf[sizeof(buf) - 1] = 0;
		ptr = buf;
		while (*ptr != 0) *out++ = *ptr++;
		cur += l;
		continue;
	    }
	} else if (IS_BYTE_CHAR(*cur)) {
	    char buf[11], *ptr;

	    snprintf(buf, sizeof(buf), "&#%d;", *cur);
	    buf[sizeof(buf) - 1] = 0;
            ptr = buf;
	    while (*ptr != 0) *out++ = *ptr++;
	}
	cur++;
    }
    *out = 0;
    return(buffer);

mem_error:
    xmlEntitiesErrMemory("xmlEncodeEntities: realloc failed");
    xmlFree(buffer);
    return(NULL);
}

Project: libxml2
File: entities.c

xmlGetDocEntity(const xmlDoc *doc, const xmlChar *name) {
    xmlEntityPtr cur;
    xmlEntitiesTablePtr table;

    if (doc != NULL) {
	if ((doc->intSubset != NULL) && (doc->intSubset->entities != NULL)) {
	    table = (xmlEntitiesTablePtr) doc->intSubset->entities;
	    cur = xmlGetEntityFromTable(table, name);
	    if (cur != NULL)
		return(cur);
	}
	if (doc->standalone != 1) {
	    if ((doc->extSubset != NULL) &&
		(doc->extSubset->entities != NULL)) {
		table = (xmlEntitiesTablePtr) doc->extSubset->entities;
		cur = xmlGetEntityFromTable(table, name);
		if (cur != NULL)
		    return(cur);
	    }
	}
    }
    return(xmlGetPredefinedEntity(name));
}

Project: libxml2
File: entities.c

xmlAddEntity(xmlDtdPtr dtd, const xmlChar *name, int type,
	  const xmlChar *ExternalID, const xmlChar *SystemID,
	  const xmlChar *content) {
    xmlDictPtr dict = NULL;
    xmlEntitiesTablePtr table = NULL;
    xmlEntityPtr ret, predef;

    if (name == NULL)
	return(NULL);
    if (dtd == NULL)
	return(NULL);
    if (dtd->doc != NULL)
        dict = dtd->doc->dict;

    switch (type) {
        case XML_INTERNAL_GENERAL_ENTITY:
        case XML_EXTERNAL_GENERAL_PARSED_ENTITY:
        case XML_EXTERNAL_GENERAL_UNPARSED_ENTITY:
            predef = xmlGetPredefinedEntity(name);
            if (predef != NULL) {
                int valid = 0;

                /* 4.6 Predefined Entities */
                if ((type == XML_INTERNAL_GENERAL_ENTITY) &&
                    (content != NULL)) {
                    int c = predef->content[0];

                    if (((content[0] == c) && (content[1] == 0)) &&
                        ((c == '>') || (c == '\'') || (c == '"'))) {
                        valid = 1;
                    } else if ((content[0] == '&') && (content[1] == '#')) {
                        if (content[2] == 'x') {
                            xmlChar *hex = BAD_CAST "0123456789ABCDEF";
                            xmlChar ref[] = "00;";

                            ref[0] = hex[c / 16 % 16];
                            ref[1] = hex[c % 16];
                            if (xmlStrcasecmp(&content[3], ref) == 0)
                                valid = 1;
                        } else {
                            xmlChar ref[] = "00;";

                            ref[0] = '0' + c / 10 % 10;
                            ref[1] = '0' + c % 10;
                            if (xmlStrEqual(&content[2], ref))
                                valid = 1;
                        }
                    }
                }
                if (!valid) {
                    xmlEntitiesErr(XML_ERR_ENTITY_PROCESSING,
                            "xmlAddEntity: invalid redeclaration of predefined"
                            " entity");
                    return(NULL);
                }
            }
	    if (dtd->entities == NULL)
		dtd->entities = xmlHashCreateDict(0, dict);
	    table = dtd->entities;
	    break;
        case XML_INTERNAL_PARAMETER_ENTITY:
        case XML_EXTERNAL_PARAMETER_ENTITY:
	    if (dtd->pentities == NULL)
		dtd->pentities = xmlHashCreateDict(0, dict);
	    table = dtd->pentities;
	    break;
        case XML_INTERNAL_PREDEFINED_ENTITY:
	    return(NULL);
    }
    if (table == NULL)
	return(NULL);
    ret = xmlCreateEntity(dict, name, type, ExternalID, SystemID, content);
    if (ret == NULL)
        return(NULL);
    ret->doc = dtd->doc;

    if (xmlHashAddEntry(table, name, ret)) {
	/*
	 * entity was already defined at another level.
	 */
        xmlFreeEntity(ret);
	return(NULL);
    }
    return(ret);
}

Project: libxml2
File: entities.c

xmlFreeEntitiesTable(xmlEntitiesTablePtr table) {
    xmlHashFree(table, xmlFreeEntityWrapper);
}

Project: libxml2
File: entities.c

xmlEncodeAttributeEntities(xmlDocPtr doc, const xmlChar *input) {
    return xmlEncodeEntitiesInternal(doc, input, 1);
}

Project: libxml2
File: entities.c

xmlEncodeSpecialChars(const xmlDoc *doc ATTRIBUTE_UNUSED, const xmlChar *input) {
    const xmlChar *cur = input;
    xmlChar *buffer = NULL;
    xmlChar *out = NULL;
    size_t buffer_size = 0;
    if (input == NULL) return(NULL);

    /*
     * allocate an translation buffer.
     */
    buffer_size = 1000;
    buffer = (xmlChar *) xmlMalloc(buffer_size * sizeof(xmlChar));
    if (buffer == NULL) {
        xmlEntitiesErrMemory("xmlEncodeSpecialChars: malloc failed");
	return(NULL);
    }
    out = buffer;

    while (*cur != '\0') {
        size_t indx = out - buffer;
        if (indx + 10 > buffer_size) {

	    growBufferReentrant();
	    out = &buffer[indx];
	}

	/*
	 * By default one have to encode at least '<', '>', '"' and '&' !
	 */
	if (*cur == '<') {
	    *out++ = '&';
	    *out++ = 'l';
	    *out++ = 't';
	    *out++ = ';';
	} else if (*cur == '>') {
	    *out++ = '&';
	    *out++ = 'g';
	    *out++ = 't';
	    *out++ = ';';
	} else if (*cur == '&') {
	    *out++ = '&';
	    *out++ = 'a';
	    *out++ = 'm';
	    *out++ = 'p';
	    *out++ = ';';
	} else if (*cur == '"') {
	    *out++ = '&';
	    *out++ = 'q';
	    *out++ = 'u';
	    *out++ = 'o';
	    *out++ = 't';
	    *out++ = ';';
	} else if (*cur == '\r') {
	    *out++ = '&';
	    *out++ = '#';
	    *out++ = '1';
	    *out++ = '3';
	    *out++ = ';';
	} else {
	    /*
	     * Works because on UTF-8, all extended sequences cannot
	     * result in bytes in the ASCII range.
	     */
	    *out++ = *cur;
	}
	cur++;
    }
    *out = 0;
    return(buffer);

mem_error:
    xmlEntitiesErrMemory("xmlEncodeSpecialChars: realloc failed");
    xmlFree(buffer);
    return(NULL);
}

Project: libxml2
File: entities.c

xmlEntitiesErrMemory(const char *extra)
{
    __xmlSimpleError(XML_FROM_TREE, XML_ERR_NO_MEMORY, NULL, NULL, extra);
}

Project: libxml2
File: entities.c

xmlGetEntityFromTable(xmlEntitiesTablePtr table, const xmlChar *name) {
    return((xmlEntityPtr) xmlHashLookup(table, name));
}

Project: libxml2
File: entities.c

xmlDumpEntityDeclScan(void *ent, void *buf,
                      const xmlChar *name ATTRIBUTE_UNUSED) {
    xmlDumpEntityDecl((xmlBufferPtr) buf, (xmlEntityPtr) ent);
}

Project: libxml2
File: entities.c

xmlDumpEntityContent(xmlBufferPtr buf, const xmlChar *content) {
    if (buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) return;
    if (xmlStrchr(content, '%')) {
        const xmlChar * base, *cur;

	xmlBufferCCat(buf, "\"");
	base = cur = content;
	while (*cur != 0) {
	    if (*cur == '"') {
		if (base != cur)
		    xmlBufferAdd(buf, base, cur - base);
		xmlBufferAdd(buf, BAD_CAST "&quot;", 6);
		cur++;
		base = cur;
	    } else if (*cur == '%') {
		if (base != cur)
		    xmlBufferAdd(buf, base, cur - base);
		xmlBufferAdd(buf, BAD_CAST "&#x25;", 6);
		cur++;
		base = cur;
	    } else {
		cur++;
	    }
	}
	if (base != cur)
	    xmlBufferAdd(buf, base, cur - base);
	xmlBufferCCat(buf, "\"");
    } else {
        xmlBufferWriteQuotedString(buf, content);
    }
}

Project: libxml2
File: entities.c

xmlDumpEntitiesTable(xmlBufferPtr buf, xmlEntitiesTablePtr table) {
    xmlHashScan(table, xmlDumpEntityDeclScan, buf);
}

Project: libxml2
File: entities.c

xmlCreateEntity(xmlDictPtr dict, const xmlChar *name, int type,
	        const xmlChar *ExternalID, const xmlChar *SystemID,
	        const xmlChar *content) {
    xmlEntityPtr ret;

    ret = (xmlEntityPtr) xmlMalloc(sizeof(xmlEntity));
    if (ret == NULL) {
        xmlEntitiesErrMemory("xmlCreateEntity: malloc failed");
	return(NULL);
    }
    memset(ret, 0, sizeof(xmlEntity));
    ret->type = XML_ENTITY_DECL;
    ret->checked = 0;

    /*
     * fill the structure.
     */
    ret->etype = (xmlEntityType) type;
    if (dict == NULL) {
	ret->name = xmlStrdup(name);
	if (ExternalID != NULL)
	    ret->ExternalID = xmlStrdup(ExternalID);
	if (SystemID != NULL)
	    ret->SystemID = xmlStrdup(SystemID);
    } else {
        ret->name = xmlDictLookup(dict, name, -1);
	if (ExternalID != NULL)
	    ret->ExternalID = xmlDictLookup(dict, ExternalID, -1);
	if (SystemID != NULL)
	    ret->SystemID = xmlDictLookup(dict, SystemID, -1);
    }
    if (content != NULL) {
        ret->length = xmlStrlen(content);
	if ((dict != NULL) && (ret->length < 5))
	    ret->content = (xmlChar *)
	                   xmlDictLookup(dict, content, ret->length);
	else
	    ret->content = xmlStrndup(content, ret->length);
     } else {
        ret->length = 0;
        ret->content = NULL;
    }
    ret->URI = NULL; /* to be computed by the layer knowing
			the defining entity */
    ret->orig = NULL;
    ret->owner = 0;

    return(ret);
}

Project: libxml2
File: entities.c

xmlAddDocEntity(xmlDocPtr doc, const xmlChar *name, int type,
	        const xmlChar *ExternalID, const xmlChar *SystemID,
	        const xmlChar *content) {
    xmlEntityPtr ret;
    xmlDtdPtr dtd;

    if (doc == NULL) {
	xmlEntitiesErr(XML_DTD_NO_DOC,
	        "xmlAddDocEntity: document is NULL");
	return(NULL);
    }
    if (doc->intSubset == NULL) {
	xmlEntitiesErr(XML_DTD_NO_DTD,
	        "xmlAddDocEntity: document without internal subset");
	return(NULL);
    }
    dtd = doc->intSubset;
    ret = xmlAddEntity(dtd, name, type, ExternalID, SystemID, content);
    if (ret == NULL) return(NULL);

    /*
     * Link it to the DTD
     */
    ret->parent = dtd;
    ret->doc = dtd->doc;
    if (dtd->last == NULL) {
	dtd->children = dtd->last = (xmlNodePtr) ret;
    } else {
	dtd->last->next = (xmlNodePtr) ret;
	ret->prev = dtd->last;
	dtd->last = (xmlNodePtr) ret;
    }
    return(ret);
}

Project: libxml2
File: entities.c

xmlNewEntity(xmlDocPtr doc, const xmlChar *name, int type,
	     const xmlChar *ExternalID, const xmlChar *SystemID,
	     const xmlChar *content) {
    xmlEntityPtr ret;
    xmlDictPtr dict;

    if ((doc != NULL) && (doc->intSubset != NULL)) {
	return(xmlAddDocEntity(doc, name, type, ExternalID, SystemID, content));
    }
    if (doc != NULL)
        dict = doc->dict;
    else
        dict = NULL;
    ret = xmlCreateEntity(dict, name, type, ExternalID, SystemID, content);
    if (ret == NULL)
        return(NULL);
    ret->doc = doc;
    return(ret);
}

Project: libxml2
File: entities.c

xmlEncodeEntitiesReentrant(xmlDocPtr doc, const xmlChar *input) {
    return xmlEncodeEntitiesInternal(doc, input, 0);
}

Project: libxml2
File: entities.c

xmlAddDtdEntity(xmlDocPtr doc, const xmlChar *name, int type,
	        const xmlChar *ExternalID, const xmlChar *SystemID,
		const xmlChar *content) {
    xmlEntityPtr ret;
    xmlDtdPtr dtd;

    if (doc == NULL) {
	xmlEntitiesErr(XML_DTD_NO_DOC,
	        "xmlAddDtdEntity: document is NULL");
	return(NULL);
    }
    if (doc->extSubset == NULL) {
	xmlEntitiesErr(XML_DTD_NO_DTD,
	        "xmlAddDtdEntity: document without external subset");
	return(NULL);
    }
    dtd = doc->extSubset;
    ret = xmlAddEntity(dtd, name, type, ExternalID, SystemID, content);
    if (ret == NULL) return(NULL);

    /*
     * Link it to the DTD
     */
    ret->parent = dtd;
    ret->doc = dtd->doc;
    if (dtd->last == NULL) {
	dtd->children = dtd->last = (xmlNodePtr) ret;
    } else {
        dtd->last->next = (xmlNodePtr) ret;
	ret->prev = dtd->last;
	dtd->last = (xmlNodePtr) ret;
    }
    return(ret);
}

Project: libxml2
File: entities.c

xmlFreeEntityWrapper(void *entity, const xmlChar *name ATTRIBUTE_UNUSED) {
    if (entity != NULL)
	xmlFreeEntity((xmlEntityPtr) entity);
}

Project: libxml2
File: entities.c

xmlEntitiesErr(xmlParserErrors code, const char *msg)
{
    __xmlSimpleError(XML_FROM_TREE, code, NULL, msg, NULL);
}

Project: libxml2
File: entities.c

xmlCreateEntitiesTable(void) {
    return((xmlEntitiesTablePtr) xmlHashCreate(0));
}

Project: libxml2
File: entities.c

xmlCopyEntitiesTable(xmlEntitiesTablePtr table) {
    return(xmlHashCopy(table, xmlCopyEntity));
}