valid.c.svn-base

这是一个用于解析xml文件的类库。使用这个类库

    /*
     * Validity Check:
     * Multiple ID per element
     */
    elemDef = xmlGetDtdElementDesc2(dtd, elem, 1);
    if (elemDef != NULL) {

#ifdef LIBXML_VALID_ENABLED
        if ((type == XML_ATTRIBUTE_ID) &&
	    (xmlScanIDAttributeDecl(NULL, elemDef) != 0)) {
	    xmlErrValidNode(ctxt, (xmlNodePtr) dtd, XML_DTD_MULTIPLE_ID,
	   "Element %s has too may ID attributes defined : %s\n",
		   elem, name, NULL);
	    ctxt->valid = 0;
	}
#endif /* LIBXML_VALID_ENABLED */

	/*
	 * Insert namespace default def first they need to be
	 * processed first.
	 */
	if ((xmlStrEqual(ret->name, BAD_CAST "xmlns")) ||
	    ((ret->prefix != NULL &&
	     (xmlStrEqual(ret->prefix, BAD_CAST "xmlns"))))) {
	    ret->nexth = elemDef->attributes;
	    elemDef->attributes = ret;
	} else {
	    xmlAttributePtr tmp = elemDef->attributes;

	    while ((tmp != NULL) &&
		   ((xmlStrEqual(tmp->name, BAD_CAST "xmlns")) ||
		    ((ret->prefix != NULL &&
		     (xmlStrEqual(ret->prefix, BAD_CAST "xmlns")))))) {
		if (tmp->nexth == NULL)
		    break;
		tmp = tmp->nexth;
	    }
	    if (tmp != NULL) {
		ret->nexth = tmp->nexth;
	        tmp->nexth = ret;
	    } else {
		ret->nexth = elemDef->attributes;
		elemDef->attributes = ret;
	    }
	}
    }

    /*
     * 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);
}

/**
 * xmlFreeAttributeTable:
 * @table:  An attribute table
 *
 * Deallocate the memory used by an entities hash table.
 */
void
xmlFreeAttributeTable(xmlAttributeTablePtr table) {
    xmlHashFree(table, (xmlHashDeallocator) xmlFreeAttribute);
}

#ifdef LIBXML_TREE_ENABLED
/**
 * xmlCopyAttribute:
 * @attr:  An attribute
 *
 * Build a copy of an attribute.
 * 
 * Returns the new xmlAttributePtr or NULL in case of error.
 */
static xmlAttributePtr
xmlCopyAttribute(xmlAttributePtr attr) {
    xmlAttributePtr cur;

    cur = (xmlAttributePtr) xmlMalloc(sizeof(xmlAttribute));
    if (cur == NULL) {
	xmlVErrMemory(NULL, "malloc failed");
	return(NULL);
    }
    memset(cur, 0, sizeof(xmlAttribute));
    cur->type = XML_ATTRIBUTE_DECL;
    cur->atype = attr->atype;
    cur->def = attr->def;
    cur->tree = xmlCopyEnumeration(attr->tree);
    if (attr->elem != NULL)
	cur->elem = xmlStrdup(attr->elem);
    if (attr->name != NULL)
	cur->name = xmlStrdup(attr->name);
    if (attr->prefix != NULL)
	cur->prefix = xmlStrdup(attr->prefix);
    if (attr->defaultValue != NULL)
	cur->defaultValue = xmlStrdup(attr->defaultValue);
    return(cur);
}

/**
 * xmlCopyAttributeTable:
 * @table:  An attribute table
 *
 * Build a copy of an attribute table.
 * 
 * Returns the new xmlAttributeTablePtr or NULL in case of error.
 */
xmlAttributeTablePtr
xmlCopyAttributeTable(xmlAttributeTablePtr table) {
    return((xmlAttributeTablePtr) xmlHashCopy(table,
				    (xmlHashCopier) xmlCopyAttribute));
}
#endif /* LIBXML_TREE_ENABLED */

#ifdef LIBXML_OUTPUT_ENABLED
/**
 * xmlDumpAttributeDecl:
 * @buf:  the XML buffer output
 * @attr:  An attribute declaration
 *
 * This will dump the content of the attribute declaration as an XML
 * DTD definition
 */
void
xmlDumpAttributeDecl(xmlBufferPtr buf, xmlAttributePtr attr) {
    xmlBufferWriteChar(buf, "<!ATTLIST ");
    xmlBufferWriteCHAR(buf, attr->elem);
    xmlBufferWriteChar(buf, " ");
    if (attr->prefix != NULL) {
	xmlBufferWriteCHAR(buf, attr->prefix);
	xmlBufferWriteChar(buf, ":");
    }
    xmlBufferWriteCHAR(buf, attr->name);
    switch (attr->atype) {
	case XML_ATTRIBUTE_CDATA:
	    xmlBufferWriteChar(buf, " CDATA");
	    break;
	case XML_ATTRIBUTE_ID:
	    xmlBufferWriteChar(buf, " ID");
	    break;
	case XML_ATTRIBUTE_IDREF:
	    xmlBufferWriteChar(buf, " IDREF");
	    break;
	case XML_ATTRIBUTE_IDREFS:
	    xmlBufferWriteChar(buf, " IDREFS");
	    break;
	case XML_ATTRIBUTE_ENTITY:
	    xmlBufferWriteChar(buf, " ENTITY");
	    break;
	case XML_ATTRIBUTE_ENTITIES:
	    xmlBufferWriteChar(buf, " ENTITIES");
	    break;
	case XML_ATTRIBUTE_NMTOKEN:
	    xmlBufferWriteChar(buf, " NMTOKEN");
	    break;
	case XML_ATTRIBUTE_NMTOKENS:
	    xmlBufferWriteChar(buf, " NMTOKENS");
	    break;
	case XML_ATTRIBUTE_ENUMERATION:
	    xmlBufferWriteChar(buf, " (");
	    xmlDumpEnumeration(buf, attr->tree);
	    break;
	case XML_ATTRIBUTE_NOTATION:
	    xmlBufferWriteChar(buf, " NOTATION (");
	    xmlDumpEnumeration(buf, attr->tree);
	    break;
	default:
	    xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR, 
		    "Internal: ATTRIBUTE struct corrupted invalid type\n",
		    NULL);
    }
    switch (attr->def) {
	case XML_ATTRIBUTE_NONE:
	    break;
	case XML_ATTRIBUTE_REQUIRED:
	    xmlBufferWriteChar(buf, " #REQUIRED");
	    break;
	case XML_ATTRIBUTE_IMPLIED:
	    xmlBufferWriteChar(buf, " #IMPLIED");
	    break;
	case XML_ATTRIBUTE_FIXED:
	    xmlBufferWriteChar(buf, " #FIXED");
	    break;
	default:
	    xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR, 
		    "Internal: ATTRIBUTE struct corrupted invalid def\n",
		    NULL);
    }
    if (attr->defaultValue != NULL) {
	xmlBufferWriteChar(buf, " ");
	xmlBufferWriteQuotedString(buf, attr->defaultValue);
    }
    xmlBufferWriteChar(buf, ">\n");
}

/**
 * xmlDumpAttributeDeclScan:
 * @attr:  An attribute declaration
 * @buf:  the XML buffer output
 *
 * This is used with the hash scan function - just reverses arguments
 */
static void
xmlDumpAttributeDeclScan(xmlAttributePtr attr, xmlBufferPtr buf) {
    xmlDumpAttributeDecl(buf, attr);
}

/**
 * xmlDumpAttributeTable:
 * @buf:  the XML buffer output
 * @table:  An attribute table
 *
 * This will dump the content of the attribute table as an XML DTD definition
 */
void
xmlDumpAttributeTable(xmlBufferPtr buf, xmlAttributeTablePtr table) {
    xmlHashScan(table, (xmlHashScanner) xmlDumpAttributeDeclScan, buf);
}
#endif /* LIBXML_OUTPUT_ENABLED */

/************************************************************************
 *									*
 *				NOTATIONs				*
 *									*
 ************************************************************************/
/**
 * xmlCreateNotationTable:
 *
 * create and initialize an empty notation hash table.
 *
 * Returns the xmlNotationTablePtr just created or NULL in case
 *                of error.
 */
static xmlNotationTablePtr
xmlCreateNotationTable(void) {
    return(xmlHashCreate(0));
}

/**
 * xmlFreeNotation:
 * @not:  A notation
 *
 * Deallocate the memory used by an notation definition
 */
static void
xmlFreeNotation(xmlNotationPtr nota) {
    if (nota == NULL) return;
    if (nota->name != NULL)
	xmlFree((xmlChar *) nota->name);
    if (nota->PublicID != NULL)
	xmlFree((xmlChar *) nota->PublicID);
    if (nota->SystemID != NULL)
	xmlFree((xmlChar *) nota->SystemID);
    xmlFree(nota);
}


/**
 * xmlAddNotationDecl:
 * @dtd:  pointer to the DTD
 * @ctxt:  the validation context
 * @name:  the entity name
 * @PublicID:  the public identifier or NULL
 * @SystemID:  the system identifier or NULL
 *
 * Register a new notation declaration
 *
 * Returns NULL if not, otherwise the entity
 */
xmlNotationPtr
xmlAddNotationDecl(xmlValidCtxtPtr ctxt, xmlDtdPtr dtd,
	           const xmlChar *name,
                   const xmlChar *PublicID, const xmlChar *SystemID) {
    xmlNotationPtr ret;
    xmlNotationTablePtr table;

    if (dtd == NULL) {
	return(NULL);
    }
    if (name == NULL) {
	return(NULL);
    }
    if ((PublicID == NULL) && (SystemID == NULL)) {
	return(NULL);
    }

    /*
     * Create the Notation table if needed.
     */
    table = (xmlNotationTablePtr) dtd->notations;
    if (table == NULL) 
        dtd->notations = table = xmlCreateNotationTable();
    if (table == NULL) {
	xmlVErrMemory(ctxt,
		"xmlAddNotationDecl: Table creation failed!\n");
        return(NULL);
    }

    ret = (xmlNotationPtr) xmlMalloc(sizeof(xmlNotation));
    if (ret == NULL) {
	xmlVErrMemory(ctxt, "malloc failed");
	return(NULL);
    }
    memset(ret, 0, sizeof(xmlNotation));

    /*
     * fill the structure.
     */
    ret->name = xmlStrdup(name);
    if (SystemID != NULL)
        ret->SystemID = xmlStrdup(SystemID);
    if (PublicID != NULL)
        ret->PublicID = xmlStrdup(PublicID);

    /*
     * Validity Check:
     * Check the DTD for previous declarations of the ATTLIST
     */
    if (xmlHashAddEntry(table, name, ret)) {
#ifdef LIBXML_VALID_ENABLED
	xmlErrValid(NULL, XML_DTD_NOTATION_REDEFINED, 
		    "xmlAddNotationDecl: %s already defined\n",
		    (const char *) name);
#endif /* LIBXML_VALID_ENABLED */
	xmlFreeNotation(ret);
	return(NULL);
    }
    return(ret);
}

/**
 * xmlFreeNotationTable:
 * @table:  An notation table
 *
 * Deallocate the memory used by an entities hash table.
 */
void
xmlFreeNotationTable(xmlNotationTablePtr table) {
    xmlHashFree(table, (xmlHashDeallocator) xmlFreeNotation);
}

#ifdef LIBXML_TREE_ENABLED
/**
 * xmlCopyNotation:
 * @nota:  A notation
 *
 * Build a copy of a notation.
 * 
 * Returns the new xmlNotationPtr or NULL in case of error.
 */
static xmlNotationPtr
xmlCopyNotation(xmlNotationPtr nota) {
    xmlNotationPtr cur;

    cur = (xmlNotationPtr) xmlMalloc(sizeof(xmlNotation));
    if (cur == NULL) {
	xmlVErrMemory(NULL, "malloc failed");
	return(NULL);
    }
    if (nota->name != NULL)
	cur->name = xmlStrdup(nota->name);
    else
	cur->name = NULL;
    if (nota->PublicID != NULL)
	cur->PublicID = xmlStrdup(nota->PublicID);
    else
	cur->PublicID = NULL;
    if (nota->SystemID != NULL)
	cur->SystemID = xmlStrdup(nota->SystemID);
    else
	cur->SystemID = NULL;
    return(cur);
}

/**
 * xmlCopyNotationTable:
 * @table:  A notation table
 *
 * Build a copy of a notation table.
 * 
 * Returns the new xmlNotationTablePtr or NULL in case of error.
 */
xmlNotationTablePtr
xmlCopyNotationTable(xmlNotationTablePtr table) {
    return((xmlNotationTablePtr) xmlHashCopy(table,
				    (xmlHashCopier) xmlCopyNotation));
}
#endif /* LIBXML_TREE_ENABLED */

#ifdef LIBXML_OUTPUT_ENABLED
/**
 * xmlDumpNotationDecl:
 * @buf:  the XML buffer output
 * @nota:  A notation declaration
 *
 * This will dump the content the notation declaration as an XML DTD definition
 */
void
xmlDumpNotationDecl(xmlBufferPtr buf, xmlNotationPtr nota) {
    xmlBufferWriteChar(buf, "<!NOTATION ");
    xmlBufferWriteCHAR(buf, nota->name);
    if (nota->PublicID != NULL) {
	xmlBufferWriteChar(buf, " PUBLIC ");
	xmlBufferWriteQuotedString(buf, nota->PublicID);
	if (nota->SystemID != NULL) {
	    xmlBufferWriteChar(buf, " ");
	    xmlBufferWriteCHAR(buf, nota->SystemID);
	}
    } else {
	xmlBufferWriteChar(buf, " SYSTEM ");
	xmlBufferWriteCHAR(buf, nota->SystemID);
    }
    xmlBufferWriteChar(buf, " >\n");
}

/**
 * xmlDumpNotationDeclScan:
 * @nota:  A notation declaration
 * @buf:  the XML buffer output
 *
 * This is called with the hash scan function, and just reverses args
 */
static void
xmlDumpNotationDeclScan(xmlNotationPtr nota, xmlBufferPtr buf) {
    xmlDumpNotationDecl(buf, nota);
}

/**
 * xmlDumpNotationTable:
 * @buf:  the XML buffer output
 * @table:  A notation table
 *
 * This will dump the content of the notation table as an XML DTD definition
 */
void
xmlDumpNotationTable(xmlBufferPtr buf, xmlNotationTablePtr table) {
    xmlHashScan(table, (xmlHashScanner) xmlDumpNotationDeclScan, buf);
}
#endif /* LIBXML_OUTPUT_ENABLED */

/************************************************************************
 *									*
 *				IDs					*
 *									*
 ************************************************************************/
/**
 * DICT_FREE:
 * @str:  a string
 *
 * Free a string if it is not owned by the "dict" dictionnary in the
 * current scope
 */
#define DICT_FREE(str)						\
	if ((str) && ((!dict) || 				\
	    (xmlDictOwns(dict, (const xmlChar *)(str)) == 0)))	\
	    xmlFree((char *)(str));

/**
 * xmlCreateIDTable:
 *
 * create and initialize an empty id hash table.
 *
 * Returns the xmlIDTablePtr just created or NULL in case
 *                of error.
 */
static xmlIDTablePtr
xmlCreateIDTable(void) {
    return(xmlHashCr