entities.c 29 KB
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/*
 * entities.c : implementation for the XML entities handling
 *
 * See Copyright for the status of this software.
 *
 * daniel@veillard.com
 */

#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>
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#include <libxml/dict.h>
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#include "save.h"

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/*
 * The XML predefined entities.
 */

static xmlEntity xmlEntityLt = {
    NULL, XML_ENTITY_DECL, BAD_CAST "lt",
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    NULL, NULL, NULL, NULL, NULL, NULL,
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    BAD_CAST "<", BAD_CAST "<", 1,
    XML_INTERNAL_PREDEFINED_ENTITY,
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    NULL, NULL, NULL, NULL, 0, 1
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};
static xmlEntity xmlEntityGt = {
    NULL, XML_ENTITY_DECL, BAD_CAST "gt",
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    NULL, NULL, NULL, NULL, NULL, NULL,
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    BAD_CAST ">", BAD_CAST ">", 1,
    XML_INTERNAL_PREDEFINED_ENTITY,
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    NULL, NULL, NULL, NULL, 0, 1
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};
static xmlEntity xmlEntityAmp = {
    NULL, XML_ENTITY_DECL, BAD_CAST "amp",
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    NULL, NULL, NULL, NULL, NULL, NULL,
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    BAD_CAST "&", BAD_CAST "&", 1,
    XML_INTERNAL_PREDEFINED_ENTITY,
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    NULL, NULL, NULL, NULL, 0, 1
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};
static xmlEntity xmlEntityQuot = {
    NULL, XML_ENTITY_DECL, BAD_CAST "quot",
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    NULL, NULL, NULL, NULL, NULL, NULL,
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    BAD_CAST "\"", BAD_CAST "\"", 1,
    XML_INTERNAL_PREDEFINED_ENTITY,
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    NULL, NULL, NULL, NULL, 0, 1
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};
static xmlEntity xmlEntityApos = {
    NULL, XML_ENTITY_DECL, BAD_CAST "apos",
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    NULL, NULL, NULL, NULL, NULL, NULL,
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    BAD_CAST "'", BAD_CAST "'", 1,
    XML_INTERNAL_PREDEFINED_ENTITY,
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    NULL, NULL, NULL, NULL, 0, 1
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};

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/**
 * 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
 */
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static void LIBXML_ATTR_FORMAT(2,0)
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xmlEntitiesErr(xmlParserErrors code, const char *msg)
{
    __xmlSimpleError(XML_FROM_TREE, code, NULL, msg, NULL);
}

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/*
 * xmlFreeEntity : clean-up an entity record.
 */
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static void
xmlFreeEntity(xmlEntityPtr entity)
{
    xmlDictPtr dict = NULL;

    if (entity == NULL)
        return;

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

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    if ((entity->children) && (entity->owner == 1) &&
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        (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);
    }
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    xmlFree(entity);
}

/*
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 * xmlCreateEntity:
 *
 * internal routine doing the entity node strutures allocations
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 */
static xmlEntityPtr
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xmlCreateEntity(xmlDictPtr dict, const xmlChar *name, int type,
	        const xmlChar *ExternalID, const xmlChar *SystemID,
	        const xmlChar *content) {
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    xmlEntityPtr ret;

    ret = (xmlEntityPtr) xmlMalloc(sizeof(xmlEntity));
    if (ret == NULL) {
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        xmlEntitiesErrMemory("xmlCreateEntity: malloc failed");
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	return(NULL);
    }
    memset(ret, 0, sizeof(xmlEntity));
    ret->type = XML_ENTITY_DECL;
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    ret->checked = 0;
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    /*
     * fill the structure.
     */
    ret->etype = (xmlEntityType) type;
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    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);
    }
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    if (content != NULL) {
        ret->length = xmlStrlen(content);
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	if ((dict != NULL) && (ret->length < 5))
	    ret->content = (xmlChar *)
	                   xmlDictLookup(dict, content, ret->length);
	else
	    ret->content = xmlStrndup(content, ret->length);
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     } 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;
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    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);
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    ret->doc = dtd->doc;
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    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) {
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	xmlEntitiesErr(XML_DTD_NO_DOC,
	        "xmlAddDtdEntity: document is NULL");
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	return(NULL);
    }
    if (doc->extSubset == NULL) {
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	xmlEntitiesErr(XML_DTD_NO_DTD,
	        "xmlAddDtdEntity: document without external subset");
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	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) {
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	xmlEntitiesErr(XML_DTD_NO_DOC,
	        "xmlAddDocEntity: document is NULL");
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	return(NULL);
    }
    if (doc->intSubset == NULL) {
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	xmlEntitiesErr(XML_DTD_NO_DTD,
	        "xmlAddDocEntity: document without internal subset");
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	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);
}

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/**
 * 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 responsability
 * 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);
}

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/**
 * 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.
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 *
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 * 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.
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 *
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 * 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.
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 *
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 * 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.
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 *
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 * Returns A pointer to the entity structure or NULL if not found.
 */
xmlEntityPtr
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xmlGetDocEntity(const xmlDoc *doc, const xmlChar *name) {
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    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() {						\
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    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;						\
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}

/**
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 * xmlEncodeEntitiesInternal:
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 * @doc:  the document containing the string
 * @input:  A string to convert to XML.
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 * @attr: are we handling an atrbute value
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 *
 * 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.
 */
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static xmlChar *
xmlEncodeEntitiesInternal(xmlDocPtr doc, const xmlChar *input, int attr) {
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    const xmlChar *cur = input;
    xmlChar *buffer = NULL;
    xmlChar *out = NULL;
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    size_t buffer_size = 0;
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    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) {
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        xmlEntitiesErrMemory("xmlEncodeEntities: malloc failed");
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	return(NULL);
    }
    out = buffer;

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

	/*
	 * By default one have to encode at least '<', '>', '"' and '&' !
	 */
	if (*cur == '<') {
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	    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;
	    }
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	    *out++ = '&';
	    *out++ = 'l';
	    *out++ = 't';
	    *out++ = ';';
	} else if (*cur == '>') {
	    *out++ = '&';
	    *out++ = 'g';
	    *out++ = 't';
	    *out++ = ';';
	} else if (*cur == '&') {
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	    /*
	     * 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;
	    }
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	    *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)) {
		/*
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		 * Bjørn Reese <br@sseusa.com> provided the patch
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	        xmlChar xc;
	        xc = (*cur & 0x3F) << 6;
	        if (cur[1] != 0) {
		    xc += *(++cur) & 0x3F;
		    *out++ = xc;
	        } else
		 */
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		*out++ = *cur;
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	    } else {
		/*
		 * We assume we have UTF-8 input.
		 */
		char buf[11], *ptr;
		int val = 0, l = 1;

		if (*cur < 0xC0) {
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		    xmlEntitiesErr(XML_CHECK_NOT_UTF8,
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			    "xmlEncodeEntities: input not UTF-8");
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		    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))) {
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		    xmlEntitiesErr(XML_ERR_INVALID_CHAR,
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			"xmlEncodeEntities: char out of range\n");
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		    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
		 */
716
		snprintf(buf, sizeof(buf), "&#x%X;", val);
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		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++;
    }
733
    *out = 0;
734
    return(buffer);
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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);
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}

/**
 * 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 *
786
xmlEncodeSpecialChars(const xmlDoc *doc ATTRIBUTE_UNUSED, const xmlChar *input) {
787 788 789
    const xmlChar *cur = input;
    xmlChar *buffer = NULL;
    xmlChar *out = NULL;
790
    size_t buffer_size = 0;
791 792 793 794 795 796 797 798
    if (input == NULL) return(NULL);

    /*
     * allocate an translation buffer.
     */
    buffer_size = 1000;
    buffer = (xmlChar *) xmlMalloc(buffer_size * sizeof(xmlChar));
    if (buffer == NULL) {
799
        xmlEntitiesErrMemory("xmlEncodeSpecialChars: malloc failed");
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	return(NULL);
    }
    out = buffer;

    while (*cur != '\0') {
805 806
        size_t indx = out - buffer;
        if (indx + 10 > buffer_size) {
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	    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++;
    }
853
    *out = 0;
854
    return(buffer);
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mem_error:
    xmlEntitiesErrMemory("xmlEncodeSpecialChars: realloc failed");
    xmlFree(buffer);
    return(NULL);
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}

/**
 * xmlCreateEntitiesTable:
 *
 * create and initialize an empty entities hash table.
866
 * This really doesn't make sense and should be deprecated
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 *
 * 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(xmlEntityPtr entity,
	               const xmlChar *name ATTRIBUTE_UNUSED) {
    if (entity != NULL)
	xmlFreeEntity(entity);
}

/**
 * xmlFreeEntitiesTable:
 * @table:  An entity table
 *
 * Deallocate the memory used by an entities hash table.
 */
void
xmlFreeEntitiesTable(xmlEntitiesTablePtr table) {
    xmlHashFree(table, (xmlHashDeallocator) xmlFreeEntityWrapper);
}

#ifdef LIBXML_TREE_ENABLED
/**
 * xmlCopyEntity:
 * @ent:  An entity
 *
 * Build a copy of an entity
906
 *
907 908 909 910 911 912 913 914
 * Returns the new xmlEntitiesPtr or NULL in case of error.
 */
static xmlEntityPtr
xmlCopyEntity(xmlEntityPtr ent) {
    xmlEntityPtr cur;

    cur = (xmlEntityPtr) xmlMalloc(sizeof(xmlEntity));
    if (cur == NULL) {
915
        xmlEntitiesErrMemory("xmlCopyEntity:: malloc failed");
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	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.
942
 *
943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002
 * Returns the new xmlEntitiesTablePtr or NULL in case of error.
 */
xmlEntitiesTablePtr
xmlCopyEntitiesTable(xmlEntitiesTablePtr table) {
    return(xmlHashCopy(table, (xmlHashCopier) 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 "&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);
    }
}

/**
 * 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) {
1003
    if ((buf == NULL) || (ent == NULL)) return;
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    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:
1075 1076
	    xmlEntitiesErr(XML_DTD_UNKNOWN_ENTITY,
		"xmlDumpEntitiesDecl: internal: unknown type entity type");
1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090
    }
}

/**
 * xmlDumpEntityDeclScan:
 * @ent:  An entity table
 * @buf:  An XML buffer.
 *
 * When using the hash table scan function, arguments need to be reversed
 */
static void
xmlDumpEntityDeclScan(xmlEntityPtr ent, xmlBufferPtr buf) {
    xmlDumpEntityDecl(buf, ent);
}
1091

1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103
/**
 * 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, (xmlHashScanner)xmlDumpEntityDeclScan, buf);
}
#endif /* LIBXML_OUTPUT_ENABLED */
1104 1105
#define bottom_entities
#include "elfgcchack.h"