/*

 * 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 strutures 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;

    ret->guard = XML_ENTITY_NOT_BEING_CHECKED;

    /*

     * 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 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);

}

/**

 * 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 atrbute 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.

		 */

		char buf[11], *ptr;

		int val = 0, l = 1;

		if (*cur < 0xC0) {

		    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));

}