HTMLtree.c

Go to the documentation of this file.

/*
 * HTMLtree.c : implementation of access function for an HTML tree.
 *
 * See Copyright for the status of this software.
 *
 * daniel@veillard.com
 */


#define IN_LIBXML
#include "libxml.h"
#ifdef LIBXML_HTML_ENABLED

#include <string.h> /* for memset() only ! */

#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif

#include <libxml/xmlmemory.h>
#include <libxml/HTMLparser.h>
#include <libxml/HTMLtree.h>
#include <libxml/entities.h>
#include <libxml/valid.h>
#include <libxml/xmlerror.h>
#include <libxml/parserInternals.h>
#include <libxml/globals.h>
#include <libxml/uri.h>

/************************************************************************
 *                                  *
 *          Getting/Setting encoding meta tags          *
 *                                  *
 ************************************************************************/

const xmlChar *
htmlGetMetaEncoding(htmlDocPtr doc) {
    htmlNodePtr cur;
    const xmlChar *content;
    const xmlChar *encoding;

    if (doc == NULL)
    return(NULL);
    cur = doc->children;

    /*
     * Search the html
     */
    while (cur != NULL) {
    if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {
        if (xmlStrEqual(cur->name, BAD_CAST"html"))
        break;
        if (xmlStrEqual(cur->name, BAD_CAST"head"))
        goto found_head;
        if (xmlStrEqual(cur->name, BAD_CAST"meta"))
        goto found_meta;
    }
    cur = cur->next;
    }
    if (cur == NULL)
    return(NULL);
    cur = cur->children;

    /*
     * Search the head
     */
    while (cur != NULL) {
    if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {
        if (xmlStrEqual(cur->name, BAD_CAST"head"))
        break;
        if (xmlStrEqual(cur->name, BAD_CAST"meta"))
        goto found_meta;
    }
    cur = cur->next;
    }
    if (cur == NULL)
    return(NULL);
found_head:
    cur = cur->children;

    /*
     * Search the meta elements
     */
found_meta:
    while (cur != NULL) {
    if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {
        if (xmlStrEqual(cur->name, BAD_CAST"meta")) {
        xmlAttrPtr attr = cur->properties;
        int http;
        const xmlChar *value;

        content = NULL;
        http = 0;
        while (attr != NULL) {
            if ((attr->children != NULL) &&
                (attr->children->type == XML_TEXT_NODE) &&
                (attr->children->next == NULL)) {
            value = attr->children->content;
            if ((!xmlStrcasecmp(attr->name, BAD_CAST"http-equiv"))
             && (!xmlStrcasecmp(value, BAD_CAST"Content-Type")))
                http = 1;
            else if ((value != NULL)
             && (!xmlStrcasecmp(attr->name, BAD_CAST"content")))
                content = value;
            if ((http != 0) && (content != NULL))
                goto found_content;
            }
            attr = attr->next;
        }
        }
    }
    cur = cur->next;
    }
    return(NULL);

found_content:
    encoding = xmlStrstr(content, BAD_CAST"charset=");
    if (encoding == NULL) 
    encoding = xmlStrstr(content, BAD_CAST"Charset=");
    if (encoding == NULL) 
    encoding = xmlStrstr(content, BAD_CAST"CHARSET=");
    if (encoding != NULL) {
    encoding += 8;
    } else {
    encoding = xmlStrstr(content, BAD_CAST"charset =");
    if (encoding == NULL) 
        encoding = xmlStrstr(content, BAD_CAST"Charset =");
    if (encoding == NULL) 
        encoding = xmlStrstr(content, BAD_CAST"CHARSET =");
    if (encoding != NULL)
        encoding += 9;
    }
    if (encoding != NULL) {
    while ((*encoding == ' ') || (*encoding == '\t')) encoding++;
    }
    return(encoding);
}

int
htmlSetMetaEncoding(htmlDocPtr doc, const xmlChar *encoding) {
    htmlNodePtr cur, meta = NULL, head = NULL;
    const xmlChar *content = NULL;
    char newcontent[100];


    if (doc == NULL)
    return(-1);

    /* html isn't a real encoding it's just libxml2 way to get entities */
    if (!xmlStrcasecmp(encoding, BAD_CAST "html"))
        return(-1);

    if (encoding != NULL) {
    snprintf(newcontent, sizeof(newcontent), "text/html; charset=%s",
                (char *)encoding);
    newcontent[sizeof(newcontent) - 1] = 0;
    }

    cur = doc->children;

    /*
     * Search the html
     */
    while (cur != NULL) {
    if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {
        if (xmlStrcasecmp(cur->name, BAD_CAST"html") == 0)
        break;
        if (xmlStrcasecmp(cur->name, BAD_CAST"head") == 0)
        goto found_head;
        if (xmlStrcasecmp(cur->name, BAD_CAST"meta") == 0)
        goto found_meta;
    }
    cur = cur->next;
    }
    if (cur == NULL)
    return(-1);
    cur = cur->children;

    /*
     * Search the head
     */
    while (cur != NULL) {
    if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {
        if (xmlStrcasecmp(cur->name, BAD_CAST"head") == 0)
        break;
        if (xmlStrcasecmp(cur->name, BAD_CAST"meta") == 0) {
                head = cur->parent;
        goto found_meta;
            }
    }
    cur = cur->next;
    }
    if (cur == NULL)
    return(-1);
found_head:
    head = cur;
    if (cur->children == NULL)
        goto create;
    cur = cur->children;

found_meta:
    /*
     * Search and update all the remaining the meta elements carrying
     * encoding informations
     */
    while (cur != NULL) {
    if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {
        if (xmlStrcasecmp(cur->name, BAD_CAST"meta") == 0) {
        xmlAttrPtr attr = cur->properties;
        int http;
        const xmlChar *value;

        content = NULL;
        http = 0;
        while (attr != NULL) {
            if ((attr->children != NULL) &&
                (attr->children->type == XML_TEXT_NODE) &&
                (attr->children->next == NULL)) {
            value = attr->children->content;
            if ((!xmlStrcasecmp(attr->name, BAD_CAST"http-equiv"))
             && (!xmlStrcasecmp(value, BAD_CAST"Content-Type")))
                http = 1;
            else
                        {
                           if ((value != NULL) && 
                               (!xmlStrcasecmp(attr->name, BAD_CAST"content")))
                   content = value;
                        }
                if ((http != 0) && (content != NULL))
                break;
            }
            attr = attr->next;
        }
        if ((http != 0) && (content != NULL)) {
            meta = cur;
            break;
        }

        }
    }
    cur = cur->next;
    }
create:
    if (meta == NULL) {
        if ((encoding != NULL) && (head != NULL)) {
            /*
             * Create a new Meta element with the right attributes
             */

            meta = xmlNewDocNode(doc, NULL, BAD_CAST"meta", NULL);
            if (head->children == NULL)
                xmlAddChild(head, meta);
            else
                xmlAddPrevSibling(head->children, meta);
            xmlNewProp(meta, BAD_CAST"http-equiv", BAD_CAST"Content-Type");
            xmlNewProp(meta, BAD_CAST"content", BAD_CAST newcontent);
        }
    } else {
        /* change the document only if there is a real encoding change */
        if (xmlStrcasestr(content, encoding) == NULL) {
            xmlSetProp(meta, BAD_CAST"content", BAD_CAST newcontent);
        }
    }


    return(0);
}

static const char* htmlBooleanAttrs[] = {
  "checked", "compact", "declare", "defer", "disabled", "ismap",
  "multiple", "nohref", "noresize", "noshade", "nowrap", "readonly",
  "selected", NULL
};


int
htmlIsBooleanAttr(const xmlChar *name)
{
    int i = 0;

    while (htmlBooleanAttrs[i] != NULL) {
        if (xmlStrcasecmp((const xmlChar *)htmlBooleanAttrs[i], name) == 0)
            return 1;
        i++;
    }
    return 0;
}

#ifdef LIBXML_OUTPUT_ENABLED
/*
 * private routine exported from xmlIO.c
 */
xmlOutputBufferPtr
xmlAllocOutputBufferInternal(xmlCharEncodingHandlerPtr encoder);
/************************************************************************
 *                                  *
 *          Output error handlers               *
 *                                  *
 ************************************************************************/
static void
htmlSaveErrMemory(const char *extra)
{
    __xmlSimpleError(XML_FROM_OUTPUT, XML_ERR_NO_MEMORY, NULL, NULL, extra);
}

static void
htmlSaveErr(int code, xmlNodePtr node, const char *extra)
{
    const char *msg = NULL;

    switch(code) {
        case XML_SAVE_NOT_UTF8:
        msg = "string is not in UTF-8\n";
        break;
    case XML_SAVE_CHAR_INVALID:
        msg = "invalid character value\n";
        break;
    case XML_SAVE_UNKNOWN_ENCODING:
        msg = "unknown encoding %s\n";
        break;
    case XML_SAVE_NO_DOCTYPE:
        msg = "HTML has no DOCTYPE\n";
        break;
    default:
        msg = "unexpected error number\n";
    }
    __xmlSimpleError(XML_FROM_OUTPUT, code, node, msg, extra);
}

/************************************************************************
 *                                  *
 *          Dumping HTML tree content to a simple buffer        *
 *                                  *
 ************************************************************************/

static int
htmlNodeDumpFormat(xmlBufferPtr buf, xmlDocPtr doc, xmlNodePtr cur,
               int format);

static int
htmlNodeDumpFormat(xmlBufferPtr buf, xmlDocPtr doc, xmlNodePtr cur,
               int format) {
    unsigned int use;
    int ret;
    xmlOutputBufferPtr outbuf;

    if (cur == NULL) {
    return (-1);
    }
    if (buf == NULL) {
    return (-1);
    }
    outbuf = (xmlOutputBufferPtr) xmlMalloc(sizeof(xmlOutputBuffer));
    if (outbuf == NULL) {
        htmlSaveErrMemory("allocating HTML output buffer");
    return (-1);
    }
    memset(outbuf, 0, (size_t) sizeof(xmlOutputBuffer));
    outbuf->buffer = buf;
    outbuf->encoder = NULL;
    outbuf->writecallback = NULL;
    outbuf->closecallback = NULL;
    outbuf->context = NULL;
    outbuf->written = 0;

    use = buf->use;
    htmlNodeDumpFormatOutput(outbuf, doc, cur, NULL, format);
    xmlFree(outbuf);
    ret = buf->use - use;
    return (ret);
}

int
htmlNodeDump(xmlBufferPtr buf, xmlDocPtr doc, xmlNodePtr cur) {
    xmlInitParser();

    return(htmlNodeDumpFormat(buf, doc, cur, 1));
}

int
htmlNodeDumpFileFormat(FILE *out, xmlDocPtr doc,
                   xmlNodePtr cur, const char *encoding, int format) {
    xmlOutputBufferPtr buf;
    xmlCharEncodingHandlerPtr handler = NULL;
    int ret;

    xmlInitParser();

    if (encoding != NULL) {
    xmlCharEncoding enc;

    enc = xmlParseCharEncoding(encoding);
    if (enc != XML_CHAR_ENCODING_UTF8) {
        handler = xmlFindCharEncodingHandler(encoding);
        if (handler == NULL)
        return(-1);
    }
    }

    /*
     * Fallback to HTML or ASCII when the encoding is unspecified
     */
    if (handler == NULL)
    handler = xmlFindCharEncodingHandler("HTML");
    if (handler == NULL)
    handler = xmlFindCharEncodingHandler("ascii");

    /* 
     * save the content to a temp buffer.
     */
    buf = xmlOutputBufferCreateFile(out, handler);
    if (buf == NULL) return(0);

    htmlNodeDumpFormatOutput(buf, doc, cur, encoding, format);

    ret = xmlOutputBufferClose(buf);
    return(ret);
}

void
htmlNodeDumpFile(FILE *out, xmlDocPtr doc, xmlNodePtr cur) {
    htmlNodeDumpFileFormat(out, doc, cur, NULL, 1);
}

void
htmlDocDumpMemoryFormat(xmlDocPtr cur, xmlChar**mem, int *size, int format) {
    xmlOutputBufferPtr buf;
    xmlCharEncodingHandlerPtr handler = NULL;
    const char *encoding;

    xmlInitParser();

    if ((mem == NULL) || (size == NULL))
        return;
    if (cur == NULL) {
    *mem = NULL;
    *size = 0;
    return;
    }

    encoding = (const char *) htmlGetMetaEncoding(cur);

    if (encoding != NULL) {
    xmlCharEncoding enc;

    enc = xmlParseCharEncoding(encoding);
    if (enc != cur->charset) {
        if (cur->charset != XML_CHAR_ENCODING_UTF8) {
        /*
         * Not supported yet
         */
        *mem = NULL;
        *size = 0;
        return;
        }

        handler = xmlFindCharEncodingHandler(encoding);
        if (handler == NULL) {
        *mem = NULL;
        *size = 0;
        return;
        }
    } else {
        handler = xmlFindCharEncodingHandler(encoding);
    }
    }

    /*
     * Fallback to HTML or ASCII when the encoding is unspecified
     */
    if (handler == NULL)
    handler = xmlFindCharEncodingHandler("HTML");
    if (handler == NULL)
    handler = xmlFindCharEncodingHandler("ascii");

    buf = xmlAllocOutputBufferInternal(handler);
    if (buf == NULL) {
    *mem = NULL;
    *size = 0;
    return;
    }

    htmlDocContentDumpFormatOutput(buf, cur, NULL, format);

    xmlOutputBufferFlush(buf);
    if (buf->conv != NULL) {
    *size = buf->conv->use;
    *mem = xmlStrndup(buf->conv->content, *size);
    } else {
    *size = buf->buffer->use;
    *mem = xmlStrndup(buf->buffer->content, *size);
    }
    (void)xmlOutputBufferClose(buf);
}

void
htmlDocDumpMemory(xmlDocPtr cur, xmlChar**mem, int *size) {
    htmlDocDumpMemoryFormat(cur, mem, size, 1);
}


/************************************************************************
 *                                  *
 *          Dumping HTML tree content to an I/O output buffer   *
 *                                  *
 ************************************************************************/

void xmlNsListDumpOutput(xmlOutputBufferPtr buf, xmlNsPtr cur);

static void
htmlDtdDumpOutput(xmlOutputBufferPtr buf, xmlDocPtr doc,
              const char *encoding ATTRIBUTE_UNUSED) {
    xmlDtdPtr cur = doc->intSubset;

    if (cur == NULL) {
    htmlSaveErr(XML_SAVE_NO_DOCTYPE, (xmlNodePtr) doc, NULL);
    return;
    }
    xmlOutputBufferWriteString(buf, "<!DOCTYPE ");
    xmlOutputBufferWriteString(buf, (const char *)cur->name);
    if (cur->ExternalID != NULL) {
    xmlOutputBufferWriteString(buf, " PUBLIC ");
    xmlBufferWriteQuotedString(buf->buffer, cur->ExternalID);
    if (cur->SystemID != NULL) {
        xmlOutputBufferWriteString(buf, " ");
        xmlBufferWriteQuotedString(buf->buffer, cur->SystemID);
    } 
    }  else if (cur->SystemID != NULL) {
    xmlOutputBufferWriteString(buf, " SYSTEM ");
    xmlBufferWriteQuotedString(buf->buffer, cur->SystemID);
    }
    xmlOutputBufferWriteString(buf, ">\n");
}

static void
htmlAttrDumpOutput(xmlOutputBufferPtr buf, xmlDocPtr doc, xmlAttrPtr cur,
               const char *encoding ATTRIBUTE_UNUSED) {
    xmlChar *value;

    /*
     * TODO: The html output method should not escape a & character
     *       occurring in an attribute value immediately followed by
     *       a { character (see Section B.7.1 of the HTML 4.0 Recommendation).
     */

    if (cur == NULL) {
    return;
    }
    xmlOutputBufferWriteString(buf, " ");
    if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
        xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);
    xmlOutputBufferWriteString(buf, ":");
    }
    xmlOutputBufferWriteString(buf, (const char *)cur->name);
    if ((cur->children != NULL) && (!htmlIsBooleanAttr(cur->name))) {
    value = xmlNodeListGetString(doc, cur->children, 0);
    if (value) {
        xmlOutputBufferWriteString(buf, "=");
        if ((cur->ns == NULL) && (cur->parent != NULL) &&
        (cur->parent->ns == NULL) &&
        ((!xmlStrcasecmp(cur->name, BAD_CAST "href")) ||
             (!xmlStrcasecmp(cur->name, BAD_CAST "action")) ||
         (!xmlStrcasecmp(cur->name, BAD_CAST "src")) ||
         ((!xmlStrcasecmp(cur->name, BAD_CAST "name")) &&
          (!xmlStrcasecmp(cur->parent->name, BAD_CAST "a"))))) {
        xmlChar *escaped;
        xmlChar *tmp = value;

        while (IS_BLANK_CH(*tmp)) tmp++;

        escaped = xmlURIEscapeStr(tmp, BAD_CAST"@/:=?;#%&,+");
        if (escaped != NULL) {
            xmlBufferWriteQuotedString(buf->buffer, escaped);
            xmlFree(escaped);
        } else {
            xmlBufferWriteQuotedString(buf->buffer, value);
        }
        } else {
        xmlBufferWriteQuotedString(buf->buffer, value);
        }
        xmlFree(value);
    } else  {
        xmlOutputBufferWriteString(buf, "=\"\"");
    }
    }
}

static void
htmlAttrListDumpOutput(xmlOutputBufferPtr buf, xmlDocPtr doc, xmlAttrPtr cur, const char *encoding) {
    if (cur == NULL) {
    return;
    }
    while (cur != NULL) {
        htmlAttrDumpOutput(buf, doc, cur, encoding);
    cur = cur->next;
    }
}



static void
htmlNodeListDumpOutput(xmlOutputBufferPtr buf, xmlDocPtr doc,
                   xmlNodePtr cur, const char *encoding, int format) {
    if (cur == NULL) {
    return;
    }
    while (cur != NULL) {
        htmlNodeDumpFormatOutput(buf, doc, cur, encoding, format);
    cur = cur->next;
    }
}

void
htmlNodeDumpFormatOutput(xmlOutputBufferPtr buf, xmlDocPtr doc,
                     xmlNodePtr cur, const char *encoding, int format) {
    const htmlElemDesc * info;

    xmlInitParser();

    if ((cur == NULL) || (buf == NULL)) {
    return;
    }
    /*
     * Special cases.
     */
    if (cur->type == XML_DTD_NODE)
    return;
    if ((cur->type == XML_HTML_DOCUMENT_NODE) ||
        (cur->type == XML_DOCUMENT_NODE)){
    htmlDocContentDumpOutput(buf, (xmlDocPtr) cur, encoding);
    return;
    }
    if (cur->type == XML_ATTRIBUTE_NODE) {
        htmlAttrDumpOutput(buf, doc, (xmlAttrPtr) cur, encoding);
    return;
    }
    if (cur->type == HTML_TEXT_NODE) {
    if (cur->content != NULL) {
        if (((cur->name == (const xmlChar *)xmlStringText) ||
         (cur->name != (const xmlChar *)xmlStringTextNoenc)) &&
        ((cur->parent == NULL) ||
         ((xmlStrcasecmp(cur->parent->name, BAD_CAST "script")) &&
          (xmlStrcasecmp(cur->parent->name, BAD_CAST "style"))))) {
        xmlChar *buffer;

        buffer = xmlEncodeEntitiesReentrant(doc, cur->content);
        if (buffer != NULL) {
            xmlOutputBufferWriteString(buf, (const char *)buffer);
            xmlFree(buffer);
        }
        } else {
        xmlOutputBufferWriteString(buf, (const char *)cur->content);
        }
    }
    return;
    }
    if (cur->type == HTML_COMMENT_NODE) {
    if (cur->content != NULL) {
        xmlOutputBufferWriteString(buf, "<!--");
        xmlOutputBufferWriteString(buf, (const char *)cur->content);
        xmlOutputBufferWriteString(buf, "-->");
    }
    return;
    }
    if (cur->type == HTML_PI_NODE) {
    if (cur->name == NULL)
        return;
    xmlOutputBufferWriteString(buf, "<?");
    xmlOutputBufferWriteString(buf, (const char *)cur->name);
    if (cur->content != NULL) {
        xmlOutputBufferWriteString(buf, " ");
        xmlOutputBufferWriteString(buf, (const char *)cur->content);
    }
    xmlOutputBufferWriteString(buf, ">");
    return;
    }
    if (cur->type == HTML_ENTITY_REF_NODE) {
        xmlOutputBufferWriteString(buf, "&");
    xmlOutputBufferWriteString(buf, (const char *)cur->name);
        xmlOutputBufferWriteString(buf, ";");
    return;
    }
    if (cur->type == HTML_PRESERVE_NODE) {
    if (cur->content != NULL) {
        xmlOutputBufferWriteString(buf, (const char *)cur->content);
    }
    return;
    }

    /*
     * Get specific HTML info for that node.
     */
    if (cur->ns == NULL)
    info = htmlTagLookup(cur->name);
    else
    info = NULL;

    xmlOutputBufferWriteString(buf, "<");
    if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
        xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);
    xmlOutputBufferWriteString(buf, ":");
    }
    xmlOutputBufferWriteString(buf, (const char *)cur->name);
    if (cur->nsDef)
    xmlNsListDumpOutput(buf, cur->nsDef);
    if (cur->properties != NULL)
        htmlAttrListDumpOutput(buf, doc, cur->properties, encoding);

    if ((info != NULL) && (info->empty)) {
        xmlOutputBufferWriteString(buf, ">");
    if ((format) && (!info->isinline) && (cur->next != NULL)) {
        if ((cur->next->type != HTML_TEXT_NODE) &&
        (cur->next->type != HTML_ENTITY_REF_NODE) &&
        (cur->parent != NULL) &&
        (cur->parent->name != NULL) &&
        (cur->parent->name[0] != 'p')) /* p, pre, param */
        xmlOutputBufferWriteString(buf, "\n");
    }
    return;
    }
    if (((cur->type == XML_ELEMENT_NODE) || (cur->content == NULL)) &&
    (cur->children == NULL)) {
        if ((info != NULL) && (info->saveEndTag != 0) &&
        (xmlStrcmp(BAD_CAST info->name, BAD_CAST "html")) &&
        (xmlStrcmp(BAD_CAST info->name, BAD_CAST "body"))) {
        xmlOutputBufferWriteString(buf, ">");
    } else {
        xmlOutputBufferWriteString(buf, "></");
            if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
                xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);
                xmlOutputBufferWriteString(buf, ":");
            }
        xmlOutputBufferWriteString(buf, (const char *)cur->name);
        xmlOutputBufferWriteString(buf, ">");
    }
    if ((format) && (cur->next != NULL) &&
            (info != NULL) && (!info->isinline)) {
        if ((cur->next->type != HTML_TEXT_NODE) &&
        (cur->next->type != HTML_ENTITY_REF_NODE) &&
        (cur->parent != NULL) &&
        (cur->parent->name != NULL) &&
        (cur->parent->name[0] != 'p')) /* p, pre, param */
        xmlOutputBufferWriteString(buf, "\n");
    }
    return;
    }
    xmlOutputBufferWriteString(buf, ">");
    if ((cur->type != XML_ELEMENT_NODE) &&
    (cur->content != NULL)) {
        /*
         * Uses the OutputBuffer property to automatically convert
         * invalids to charrefs
         */

            xmlOutputBufferWriteString(buf, (const char *) cur->content);
    }
    if (cur->children != NULL) {
        if ((format) && (info != NULL) && (!info->isinline) &&
        (cur->children->type != HTML_TEXT_NODE) &&
        (cur->children->type != HTML_ENTITY_REF_NODE) &&
        (cur->children != cur->last) &&
        (cur->name != NULL) &&
        (cur->name[0] != 'p')) /* p, pre, param */
        xmlOutputBufferWriteString(buf, "\n");
    htmlNodeListDumpOutput(buf, doc, cur->children, encoding, format);
        if ((format) && (info != NULL) && (!info->isinline) &&
        (cur->last->type != HTML_TEXT_NODE) &&
        (cur->last->type != HTML_ENTITY_REF_NODE) &&
        (cur->children != cur->last) &&
        (cur->name != NULL) &&
        (cur->name[0] != 'p')) /* p, pre, param */
        xmlOutputBufferWriteString(buf, "\n");
    }
    xmlOutputBufferWriteString(buf, "</");
    if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
        xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);
    xmlOutputBufferWriteString(buf, ":");
    }
    xmlOutputBufferWriteString(buf, (const char *)cur->name);
    xmlOutputBufferWriteString(buf, ">");
    if ((format) && (info != NULL) && (!info->isinline) &&
    (cur->next != NULL)) {
        if ((cur->next->type != HTML_TEXT_NODE) &&
        (cur->next->type != HTML_ENTITY_REF_NODE) &&
        (cur->parent != NULL) &&
        (cur->parent->name != NULL) &&
        (cur->parent->name[0] != 'p')) /* p, pre, param */
        xmlOutputBufferWriteString(buf, "\n");
    }
}

void
htmlNodeDumpOutput(xmlOutputBufferPtr buf, xmlDocPtr doc,
               xmlNodePtr cur, const char *encoding) {
    htmlNodeDumpFormatOutput(buf, doc, cur, encoding, 1);
}

void
htmlDocContentDumpFormatOutput(xmlOutputBufferPtr buf, xmlDocPtr cur,
                           const char *encoding, int format) {
    int type;

    xmlInitParser();

    if ((buf == NULL) || (cur == NULL))
        return;

    /*
     * force to output the stuff as HTML, especially for entities
     */
    type = cur->type;
    cur->type = XML_HTML_DOCUMENT_NODE;
    if (cur->intSubset != NULL) {
        htmlDtdDumpOutput(buf, cur, NULL);
    }
    if (cur->children != NULL) {
        htmlNodeListDumpOutput(buf, cur, cur->children, encoding, format);
    }
    xmlOutputBufferWriteString(buf, "\n");
    cur->type = (xmlElementType) type;
}

void
htmlDocContentDumpOutput(xmlOutputBufferPtr buf, xmlDocPtr cur,
                     const char *encoding) {
    htmlDocContentDumpFormatOutput(buf, cur, encoding, 1);
}

/************************************************************************
 *                                  *
 *      Saving functions front-ends             *
 *                                  *
 ************************************************************************/

int
htmlDocDump(FILE *f, xmlDocPtr cur) {
    xmlOutputBufferPtr buf;
    xmlCharEncodingHandlerPtr handler = NULL;
    const char *encoding;
    int ret;

    xmlInitParser();

    if ((cur == NULL) || (f == NULL)) {
    return(-1);
    }

    encoding = (const char *) htmlGetMetaEncoding(cur);

    if (encoding != NULL) {
    xmlCharEncoding enc;

    enc = xmlParseCharEncoding(encoding);
    if (enc != cur->charset) {
        if (cur->charset != XML_CHAR_ENCODING_UTF8) {
        /*
         * Not supported yet
         */
        return(-1);
        }

        handler = xmlFindCharEncodingHandler(encoding);
        if (handler == NULL)
        return(-1);
    } else {
        handler = xmlFindCharEncodingHandler(encoding);
    }
    }

    /*
     * Fallback to HTML or ASCII when the encoding is unspecified
     */
    if (handler == NULL)
    handler = xmlFindCharEncodingHandler("HTML");
    if (handler == NULL)
    handler = xmlFindCharEncodingHandler("ascii");

    buf = xmlOutputBufferCreateFile(f, handler);
    if (buf == NULL) return(-1);
    htmlDocContentDumpOutput(buf, cur, NULL);

    ret = xmlOutputBufferClose(buf);
    return(ret);
}

int
htmlSaveFile(const char *filename, xmlDocPtr cur) {
    xmlOutputBufferPtr buf;
    xmlCharEncodingHandlerPtr handler = NULL;
    const char *encoding;
    int ret;

    if ((cur == NULL) || (filename == NULL))
        return(-1);
       
    xmlInitParser();

    encoding = (const char *) htmlGetMetaEncoding(cur);

    if (encoding != NULL) {
    xmlCharEncoding enc;

    enc = xmlParseCharEncoding(encoding);
    if (enc != cur->charset) {
        if (cur->charset != XML_CHAR_ENCODING_UTF8) {
        /*
         * Not supported yet
         */
        return(-1);
        }

        handler = xmlFindCharEncodingHandler(encoding);
        if (handler == NULL)
        return(-1);
    }
    }

    /*
     * Fallback to HTML or ASCII when the encoding is unspecified
     */
    if (handler == NULL)
    handler = xmlFindCharEncodingHandler("HTML");
    if (handler == NULL)
    handler = xmlFindCharEncodingHandler("ascii");

    /* 
     * save the content to a temp buffer.
     */
    buf = xmlOutputBufferCreateFilename(filename, handler, cur->compression);
    if (buf == NULL) return(0);

    htmlDocContentDumpOutput(buf, cur, NULL);

    ret = xmlOutputBufferClose(buf);
    return(ret);
}

int
htmlSaveFileFormat(const char *filename, xmlDocPtr cur,
               const char *encoding, int format) {
    xmlOutputBufferPtr buf;
    xmlCharEncodingHandlerPtr handler = NULL;
    int ret;

    if ((cur == NULL) || (filename == NULL))
        return(-1);

    xmlInitParser();

    if (encoding != NULL) {
    xmlCharEncoding enc;

    enc = xmlParseCharEncoding(encoding);
    if (enc != cur->charset) {
        if (cur->charset != XML_CHAR_ENCODING_UTF8) {
        /*
         * Not supported yet
         */
        return(-1);
        }

        handler = xmlFindCharEncodingHandler(encoding);
        if (handler == NULL)
        return(-1);
    }
        htmlSetMetaEncoding(cur, (const xmlChar *) encoding);
    } else {
    htmlSetMetaEncoding(cur, (const xmlChar *) "UTF-8");
    }

    /*
     * Fallback to HTML or ASCII when the encoding is unspecified
     */
    if (handler == NULL)
    handler = xmlFindCharEncodingHandler("HTML");
    if (handler == NULL)
    handler = xmlFindCharEncodingHandler("ascii");

    /* 
     * save the content to a temp buffer.
     */
    buf = xmlOutputBufferCreateFilename(filename, handler, 0);
    if (buf == NULL) return(0);

    htmlDocContentDumpFormatOutput(buf, cur, encoding, format);

    ret = xmlOutputBufferClose(buf);
    return(ret);
}

int
htmlSaveFileEnc(const char *filename, xmlDocPtr cur, const char *encoding) {
    return(htmlSaveFileFormat(filename, cur, encoding, 1));
}

#endif /* LIBXML_OUTPUT_ENABLED */

#define bottom_HTMLtree
#include "elfgcchack.h"
#endif /* LIBXML_HTML_ENABLED */