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/*
* entities.c : implementation for the XML entities handling
*
* See Copyright for the status of this software.
*
* daniel@veillard.com
*/
/* To avoid EBCDIC trouble when parsing on zOS */
#if defined(__MVS__)
#pragma convert("ISO8859-1")
#endif
#define IN_LIBXML
#include "libxml.h"
#include <string.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <libxml/xmlmemory.h>
#include <libxml/hash.h>
#include <libxml/entities.h>
#include <libxml/parser.h>
#include <libxml/parserInternals.h>
#include <libxml/xmlerror.h>
#include <libxml/globals.h>
#include <libxml/dict.h>
#include "save.h"
/*
* The XML predefined entities.
*/
static xmlEntity xmlEntityLt = {
NULL, XML_ENTITY_DECL, BAD_CAST "lt",
NULL, NULL, NULL, NULL, NULL, NULL,
BAD_CAST "<", BAD_CAST "<", 1,
XML_INTERNAL_PREDEFINED_ENTITY,
NULL, NULL, NULL, NULL, 0, 1
};
static xmlEntity xmlEntityGt = {
NULL, XML_ENTITY_DECL, BAD_CAST "gt",
NULL, NULL, NULL, NULL, NULL, NULL,
BAD_CAST ">", BAD_CAST ">", 1,
XML_INTERNAL_PREDEFINED_ENTITY,
NULL, NULL, NULL, NULL, 0, 1
};
static xmlEntity xmlEntityAmp = {
NULL, XML_ENTITY_DECL, BAD_CAST "amp",
NULL, NULL, NULL, NULL, NULL, NULL,
BAD_CAST "&", BAD_CAST "&", 1,
XML_INTERNAL_PREDEFINED_ENTITY,
NULL, NULL, NULL, NULL, 0, 1
};
static xmlEntity xmlEntityQuot = {
NULL, XML_ENTITY_DECL, BAD_CAST "quot",
NULL, NULL, NULL, NULL, NULL, NULL,
BAD_CAST "\"", BAD_CAST "\"", 1,
XML_INTERNAL_PREDEFINED_ENTITY,
NULL, NULL, NULL, NULL, 0, 1
};
static xmlEntity xmlEntityApos = {
NULL, XML_ENTITY_DECL, BAD_CAST "apos",
NULL, NULL, NULL, NULL, NULL, NULL,
BAD_CAST "'", BAD_CAST "'", 1,
XML_INTERNAL_PREDEFINED_ENTITY,
NULL, NULL, NULL, NULL, 0, 1
};
/**
* xmlEntitiesErrMemory:
* @extra: extra informations
*
* Handle an out of memory condition
*/
static void
xmlEntitiesErrMemory(const char *extra)
{
__xmlSimpleError(XML_FROM_TREE, XML_ERR_NO_MEMORY, NULL, NULL, extra);
}
/**
* xmlEntitiesErr:
* @code: the error code
* @msg: the message
*
* Handle an out of memory condition
*/
static void LIBXML_ATTR_FORMAT(2,0)
xmlEntitiesErr(xmlParserErrors code, const char *msg)
{
__xmlSimpleError(XML_FROM_TREE, code, NULL, msg, NULL);
}
/*
* xmlFreeEntity : clean-up an entity record.
*/
static void
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);
}
/*
* xmlCreateEntity:
*
* internal routine doing the entity node structures allocations
*/
static xmlEntityPtr
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);
}
/*
* xmlAddEntity : register a new entity for an entities table.
*/
static xmlEntityPtr
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;
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:
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);
}
/**
* xmlGetPredefinedEntity:
* @name: the entity name
*
* Check whether this name is an predefined entity.
*
* Returns NULL if not, otherwise the entity
*/
xmlEntityPtr
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);
}
/**
* xmlAddDtdEntity:
* @doc: the document
* @name: the entity name
* @type: the entity type XML_xxx_yyy_ENTITY
* @ExternalID: the entity external ID if available
* @SystemID: the entity system ID if available
* @content: the entity content
*
* Register a new entity for this document DTD external subset.
*
* Returns a pointer to the entity or NULL in case of error
*/
xmlEntityPtr
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);
}
/**
* xmlAddDocEntity:
* @doc: the document
* @name: the entity name
* @type: the entity type XML_xxx_yyy_ENTITY
* @ExternalID: the entity external ID if available
* @SystemID: the entity system ID if available
* @content: the entity content
*
* Register a new entity for this document.
*
* Returns a pointer to the entity or NULL in case of error
*/
xmlEntityPtr
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);
}
/**
* xmlNewEntity:
* @doc: the document
* @name: the entity name
* @type: the entity type XML_xxx_yyy_ENTITY
* @ExternalID: the entity external ID if available
* @SystemID: the entity system ID if available
* @content: the entity content
*
* Create a new entity, this differs from xmlAddDocEntity() that if
* the document is NULL or has no internal subset defined, then an
* unlinked entity structure will be returned, it is then the responsibility
* of the caller to link it to the document later or free it when not needed
* anymore.
*
* Returns a pointer to the entity or NULL in case of error
*/
xmlEntityPtr
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);
}
/**
* xmlGetEntityFromTable:
* @table: an entity table
* @name: the entity name
* @parameter: look for parameter entities
*
* Do an entity lookup in the table.
* returns the corresponding parameter entity, if found.
*
* Returns A pointer to the entity structure or NULL if not found.
*/
static xmlEntityPtr
xmlGetEntityFromTable(xmlEntitiesTablePtr table, const xmlChar *name) {
return((xmlEntityPtr) xmlHashLookup(table, name));
}
/**
* xmlGetParameterEntity:
* @doc: the document referencing the entity
* @name: the entity name
*
* Do an entity lookup in the internal and external subsets and
* returns the corresponding parameter entity, if found.
*
* Returns A pointer to the entity structure or NULL if not found.
*/
xmlEntityPtr
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);
}
/**
* xmlGetDtdEntity:
* @doc: the document referencing the entity
* @name: the entity name
*
* Do an entity lookup in the DTD entity hash table and
* returns the corresponding entity, if found.
* Note: the first argument is the document node, not the DTD node.
*
* Returns A pointer to the entity structure or NULL if not found.
*/
xmlEntityPtr
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);
}
/**
* xmlGetDocEntity:
* @doc: the document referencing the entity
* @name: the entity name
*
* Do an entity lookup in the document entity hash table and
* returns the corresponding entity, otherwise a lookup is done
* in the predefined entities too.
*
* Returns A pointer to the entity structure or NULL if not found.
*/
xmlEntityPtr
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));
}
/*
* Macro used to grow the current buffer.
*/
#define growBufferReentrant() { \
xmlChar *tmp; \
size_t new_size = buffer_size * 2; \
if (new_size < buffer_size) goto mem_error; \
tmp = (xmlChar *) xmlRealloc(buffer, new_size); \
if (tmp == NULL) goto mem_error; \
buffer = tmp; \
buffer_size = new_size; \
}
/**
* xmlEncodeEntitiesInternal:
* @doc: the document containing the string
* @input: A string to convert to XML.
* @attr: are we handling an attribute value
*
* Do a global encoding of a string, replacing the predefined entities
* and non ASCII values with their entities and CharRef counterparts.
* Contrary to xmlEncodeEntities, this routine is reentrant, and result
* must be deallocated.
*
* Returns A newly allocated string with the substitution done.
*/
static xmlChar *
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);
}
/**
* xmlEncodeAttributeEntities:
* @doc: the document containing the string
* @input: A string to convert to XML.
*
* Do a global encoding of a string, replacing the predefined entities
* and non ASCII values with their entities and CharRef counterparts for
* attribute values.
*
* Returns A newly allocated string with the substitution done.
*/
xmlChar *
xmlEncodeAttributeEntities(xmlDocPtr doc, const xmlChar *input) {
return xmlEncodeEntitiesInternal(doc, input, 1);
}
/**
* xmlEncodeEntitiesReentrant:
* @doc: the document containing the string
* @input: A string to convert to XML.
*
* Do a global encoding of a string, replacing the predefined entities
* and non ASCII values with their entities and CharRef counterparts.
* Contrary to xmlEncodeEntities, this routine is reentrant, and result
* must be deallocated.
*
* Returns A newly allocated string with the substitution done.
*/
xmlChar *
xmlEncodeEntitiesReentrant(xmlDocPtr doc, const xmlChar *input) {
return xmlEncodeEntitiesInternal(doc, input, 0);
}
/**
* xmlEncodeSpecialChars:
* @doc: the document containing the string
* @input: A string to convert to XML.
*
* Do a global encoding of a string, replacing the predefined entities
* this routine is reentrant, and result must be deallocated.
*
* Returns A newly allocated string with the substitution done.
*/
xmlChar *
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);
}
/**
* xmlCreateEntitiesTable:
*
* create and initialize an empty entities hash table.
* This really doesn't make sense and should be deprecated
*
* Returns the xmlEntitiesTablePtr just created or NULL in case of error.
*/
xmlEntitiesTablePtr
xmlCreateEntitiesTable(void) {
return((xmlEntitiesTablePtr) xmlHashCreate(0));
}
/**
* xmlFreeEntityWrapper:
* @entity: An entity
* @name: its name
*
* Deallocate the memory used by an entities in the hash table.
*/
static void
xmlFreeEntityWrapper(void *entity, const xmlChar *name ATTRIBUTE_UNUSED) {
if (entity != NULL)
xmlFreeEntity((xmlEntityPtr) entity);
}
/**
* xmlFreeEntitiesTable:
* @table: An entity table
*
* Deallocate the memory used by an entities hash table.
*/
void
xmlFreeEntitiesTable(xmlEntitiesTablePtr table) {
xmlHashFree(table, xmlFreeEntityWrapper);
}
#ifdef LIBXML_TREE_ENABLED
/**
* xmlCopyEntity:
* @ent: An entity
*
* Build a copy of an entity
*
* Returns the new xmlEntitiesPtr or NULL in case of error.
*/
static void *
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);
}
/**
* xmlCopyEntitiesTable:
* @table: An entity table
*
* Build a copy of an entity table.
*
* Returns the new xmlEntitiesTablePtr or NULL in case of error.
*/
xmlEntitiesTablePtr
xmlCopyEntitiesTable(xmlEntitiesTablePtr table) {
return(xmlHashCopy(table, xmlCopyEntity));
}
#endif /* LIBXML_TREE_ENABLED */
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlDumpEntityContent:
* @buf: An XML buffer.
* @content: The entity content.
*
* This will dump the quoted string value, taking care of the special
* treatment required by %
*/
static void
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 """, 6);
cur++;
base = cur;
} else if (*cur == '%') {
if (base != cur)
xmlBufferAdd(buf, base, cur - base);
xmlBufferAdd(buf, BAD_CAST "%", 6);
cur++;
base = cur;
} else {
cur++;
}
}
if (base != cur)
xmlBufferAdd(buf, base, cur - base);
xmlBufferCCat(buf, "\"");
} else {
xmlBufferWriteQuotedString(buf, content);
}
}
/**
* xmlDumpEntityDecl:
* @buf: An XML buffer.
* @ent: An entity table
*
* This will dump the content of the entity table as an XML DTD definition
*/
void
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");
}
}
/**
* xmlDumpEntityDeclScan:
* @ent: An entity table
* @buf: An XML buffer.
*
* When using the hash table scan function, arguments need to be reversed
*/
static void
xmlDumpEntityDeclScan(void *ent, void *buf,
const xmlChar *name ATTRIBUTE_UNUSED) {
xmlDumpEntityDecl((xmlBufferPtr) buf, (xmlEntityPtr) ent);
}
/**
* xmlDumpEntitiesTable:
* @buf: An XML buffer.
* @table: An entity table
*
* This will dump the content of the entity table as an XML DTD definition
*/
void
xmlDumpEntitiesTable(xmlBufferPtr buf, xmlEntitiesTablePtr table) {
xmlHashScan(table, xmlDumpEntityDeclScan, buf);
}
#endif /* LIBXML_OUTPUT_ENABLED */
#define bottom_entities
#include "elfgcchack.h"
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