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fuchsia / third_party / github.com / GNOME / libxml2 / refs/tags/LIBXML_2_4_13 / . / c14n.c
blob: 1db73fc8667f7dbb870e0cb895647846f07b335e [file] [log] [blame]
/*
* "Canonical XML" implementation
* http://www.w3.org/TR/xml-c14n
*
* "Exclusive XML Canonicalization" implementation
* http://www.w3.org/TR/xml-exc-c14n
*
* See Copyright for the status of this software.
*
* Author: Aleksey Sanin <aleksey@aleksey.com>
*/
#include "libxml.h"
#ifdef LIBXML_C14N_ENABLED
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <string.h>
#include <libxml/tree.h>
#include <libxml/parser.h>
#include <libxml/uri.h>
#include <libxml/xmlerror.h>
#include <libxml/globals.h>
#include <libxml/xpathInternals.h>
#include <libxml/c14n.h>
/************************************************************************
* *
* Some declaration better left private ATM *
* *
************************************************************************/
typedef enum {
XMLC14N_BEFORE_DOCUMENT_ELEMENT= 0,
XMLC14N_INSIDE_DOCUMENT_ELEMENT= 1,
XMLC14N_AFTER_DOCUMENT_ELEMENT= 2
} xmlC14NPosition;
typedef struct _xmlC14NCtx {
/* input parameters */
xmlDocPtr doc;
xmlNodeSetPtr visible_nodes;
int with_comments;
xmlOutputBufferPtr buf;
/* position in the XML document */
xmlC14NPosition pos;
int parent_is_doc;
/* exclusive canonicalization */
int exclusive;
xmlNodeSetPtr ns_rendered;
xmlChar **inclusive_ns_prefixes;
} xmlC14NCtx, *xmlC14NCtxPtr;
static int xmlC14NProcessNode (xmlC14NCtxPtr ctx,
xmlNodePtr cur);
static int xmlC14NProcessNodeList (xmlC14NCtxPtr ctx,
xmlNodePtr cur);
typedef enum {
XMLC14N_NORMALIZE_ATTR= 0,
XMLC14N_NORMALIZE_COMMENT= 1,
XMLC14N_NORMALIZE_PI= 2,
XMLC14N_NORMALIZE_TEXT= 3
} xmlC14NNormalizationMode;
static xmlChar* xmlC11NNormalizeString (const xmlChar *input,
xmlC14NNormalizationMode mode);
#define xmlC11NNormalizeAttr( a ) \
xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_ATTR)
#define xmlC11NNormalizeComment( a ) \
xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_COMMENT)
#define xmlC11NNormalizePI( a ) \
xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_PI)
#define xmlC11NNormalizeText( a ) \
xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_TEXT)
/************************************************************************
* *
* The implementation internals *
* *
************************************************************************/
/**
* xmlC14NIsVisible:
* @ctx: the C14N context
* @node: the node to check
*
* Checks whether the given node is visible. If the XML document normalization
* was called for the whole document then it is always "true".
*
* Returns 1 if the node is visible or 0 otherwise.
*/
/* todo: make it a define? */
static int
xmlC14NIsVisible(xmlC14NCtxPtr ctx, void *node) {
/*
* If the input is an XPath node-set, then the node-set must explicitly
* contain every node to be rendered to the canonical form.
*/
if(ctx->visible_nodes != NULL &&
!xmlXPathNodeSetContains(ctx->visible_nodes, (xmlNodePtr)node)) {
return(0);
}
return(1);
}
/**
* xmlC14NIsXmlNs:
* @ns: the namespace to check
*
* Checks whether the given namespace is a default "xml:" namespace
* with href="http://www.w3.org/XML/1998/namespace"
*
* Returns 1 if the node is default or 0 otherwise
*/
/* todo: make it a define? */
static int
xmlC14NIsXmlNs(xmlNsPtr ns) {
return (ns != NULL &&
xmlStrEqual(ns->prefix, BAD_CAST "xml") &&
xmlStrEqual(ns->href, BAD_CAST "http://www.w3.org/XML/1998/namespace"));
}
/**
* xmlExcC14NIsRendered:
* @ctx the C14N context
* @ns the namespace to check
*
* Checks whether the given namespace was already rendered or not
*
* Returns 1 if we already wrote this namespace or 0 otherwise
*/
static int
xmlExcC14NIsRendered(xmlC14NCtxPtr ctx, xmlNsPtr ns) {
int i;
if(ctx == NULL || ctx->ns_rendered == NULL || ns == NULL) {
return(0);
}
if(ctx->ns_rendered->nodeTab != NULL) {
for(i = ctx->ns_rendered->nodeNr - 1; i >= 0; --i) {
xmlNsPtr ns1 = (xmlNsPtr)ctx->ns_rendered->nodeTab[i];
if(xmlStrEqual(ns1->prefix, ns->prefix)) {
return (xmlStrEqual(ns1->href, ns->href));
}
}
}
/*
* if the default namespace xmlns="" is not defined yet then
* we do not want to print it out
*/
return(xmlStrlen(ns->prefix) == 0 && xmlStrlen(ns->href) == 0);
}
/**
* xmlC14NNamespacesCompare:
* @ns1: the pointer to first namespace
* @ns2: the pointer to second namespace
*
* Compares the namespaces by names (prefixes).
*
* Returns -1 if ns1 < ns2, 0 if ns1 == ns2 or 1 if ns1 > ns2.
*/
static int
xmlC14NNamespacesCompare(xmlNsPtr ns1, xmlNsPtr ns2) {
if(ns1 == ns2) return(0);
if(ns1 == NULL) return(-1);
if(ns2 == NULL) return(1);
return(xmlStrcmp(ns1->prefix, ns2->prefix));
}
/**
* xmlC14NPrintNamespaces:
* @ns: the pointer to namespace
* @ctx: the C14N context
*
* Prints the given namespace to the output buffer from C14N context.
*
* Returns 1 on success or 0 on fail.
*/
static int
xmlC14NPrintNamespaces(const xmlNsPtr ns, xmlC14NCtxPtr ctx) {
if(ns == NULL || ctx == NULL) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NPrintNamespace: namespace or context pointer is null\n");
#endif
return 0;
}
if(ns->prefix != NULL) {
xmlOutputBufferWriteString(ctx->buf, " xmlns:");
xmlOutputBufferWriteString(ctx->buf, (const char *)ns->prefix);
xmlOutputBufferWriteString(ctx->buf, "=\"");
} else {
xmlOutputBufferWriteString(ctx->buf, " xmlns=\"");
}
xmlOutputBufferWriteString(ctx->buf, (const char *) ns->href);
xmlOutputBufferWriteString(ctx->buf, "\"");
return(1);
}
/**
* xmlC14NProcessNamespacesAxis:
* @ctx: the C14N context
* @node: the current node
*
* Prints out canonical namespace axis of the current node to the
* buffer from C14N context as follows
*
* Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
*
* Namespace Axis
* Consider a list L containing only namespace nodes in the
* axis and in the node-set in lexicographic order (ascending). To begin
* processing L, if the first node is not the default namespace node (a node
* with no namespace URI and no local name), then generate a space followed
* by xmlns="" if and only if the following conditions are met:
* - the element E that owns the axis is in the node-set
* - The nearest ancestor element of E in the node-set has a default
* namespace node in the node-set (default namespace nodes always
* have non-empty values in XPath)
* The latter condition eliminates unnecessary occurrences of xmlns="" in
* the canonical form since an element only receives an xmlns="" if its
* default namespace is empty and if it has an immediate parent in the
* canonical form that has a non-empty default namespace. To finish
* processing L, simply process every namespace node in L, except omit
* namespace node with local name xml, which defines the xml prefix,
* if its string value is http://www.w3.org/XML/1998/namespace.
*
* Exclusive XML Canonicalization v 1.0 (http://www.w3.org/TR/xml-exc-c14n)
* Canonical XML applied to a document subset requires the search of the
* ancestor nodes of each orphan element node for attributes in the xml
* namespace, such as xml:lang and xml:space. These are copied into the
* element node except if a declaration of the same attribute is already
* in the attribute axis of the element (whether or not it is included in
* the document subset). This search and copying are omitted from the
* Exclusive XML Canonicalization method.
*
* Returns 0 on success or -1 on fail.
*/
static int
xmlC14NProcessNamespacesAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur) {
xmlNsPtr ns;
xmlListPtr list;
xmlNodePtr visible_parent;
xmlNsPtr prev;
if(ctx == NULL || cur == NULL || cur->type != XML_ELEMENT_NODE) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessNamespacesAxis: Null context or node pointer or type != XML_ELEMENT_NODE.\n");
#endif
return(-1);
}
/*
* Create a sorted list to store element namespaces
*/
list = xmlListCreate(NULL, (xmlListDataCompare)xmlC14NNamespacesCompare);
if(list == NULL) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessNamespacesAxis: list creation failed\n");
#endif
return(-1);
}
/* find nearest visible parent */
visible_parent = cur->parent;
while(visible_parent != NULL && !xmlC14NIsVisible(ctx, visible_parent)) {
visible_parent = visible_parent->parent;
}
/*
* todo: the libxml XPath implementation does not create
* nodes for all namespaces known to the node (i.e. for namespaces
* defined in node parents). By this we need to now walk thru
* all namespace in current node and all invisible ancesstors
*/
while(cur != visible_parent) {
for(ns = cur->nsDef; ns != NULL; ns = ns->next) {
/*
* first of all ignore default "xml" namespace and
* already included namespace
*/
if(xmlC14NIsXmlNs(ns) || xmlListSearch(list, ns) != NULL) {
continue;
}
/*
* Lookup nearest namespace after visible parent having
* the same prefix. Namespace included if and only if one of
* the following:
* - another namespace having the same prefix but
* different value found or
* - there is no namespaces having the same prefix and
* it is not a default xmlns="" namespace (empty prefix
* and empty href)
*/
prev = xmlSearchNs(ctx->doc, visible_parent, ns->prefix);
if(prev == NULL && (xmlStrlen(ns->prefix) > 0 || xmlStrlen(ns->href) > 0)) {
xmlListInsert(list, ns);
} else if(prev != NULL && !xmlStrEqual(ns->href, prev->href)) {
xmlListInsert(list, ns);
}
}
cur = cur->parent;
}
/*
* print out all elements from list
*/
xmlListWalk(list, (xmlListWalker)xmlC14NPrintNamespaces, (const void*)ctx);
/*
* Cleanup
*/
xmlListDelete(list);
return(0);
}
/**
* xmlExcC14NProcessNamespacesAxis:
* @ctx: the C14N context
* @node: the current node
*
* Prints out exclusive canonical namespace axis of the current node to the
* buffer from C14N context as follows
*
* Exclusive XML Canonicalization
* http://www.w3.org/TR/xml-exc-c14n
*
* If the element node is in the XPath subset then output the node in
* accordance with Canonical XML except for namespace nodes which are
* rendered as follows:
*
* 1. Render each namespace node iff:
* * it is visibly utilized by the immediate parent element or one of
* its attributes, or is present in InclusiveNamespaces PrefixList, and
* * its prefix and value do not appear in ns_rendered. ns_rendered is
* obtained by popping the state stack in order to obtain a list of
* prefixes and their values which have already been rendered by
* an output ancestor of the namespace node's parent element.
* 2. Append the rendered namespace node to the list ns_rendered of namespace
* nodes rendered by output ancestors. Push ns_rendered on state stack and
* recurse.
* 3. After the recursion returns, pop thestate stack.
*
*
* Returns 0 on success or -1 on fail.
*/
static int
xmlExcC14NProcessNamespacesAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur) {
xmlListPtr list;
xmlAttrPtr attr;
xmlNsPtr ns;
if(ctx == NULL || cur == NULL || cur->type != XML_ELEMENT_NODE) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlExcC14NProcessNamespacesAxis: Null context or node pointer or type != XML_ELEMENT_NODE.\n");
#endif
return(-1);
}
if(!ctx->exclusive || ctx->ns_rendered == NULL) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlExcC14NProcessNamespacesAxis: called for non-exclusive canonization or rendered stack is NULL.\n");
#endif
return(-1);
}
/*
* Create a sorted list to store element namespaces
*/
list = xmlListCreate(NULL, (xmlListDataCompare)xmlC14NNamespacesCompare);
if(list == NULL) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlExcC14NProcessNamespacesAxis: list creation failed\n");
#endif
return(-1);
}
/*
* First of all, add all namespaces required by current node
* (i.e. node namespace and all attribute namespaces)
* todo: do we need to check for default "xml:" namespace
*/
ns = (cur->ns != NULL) ? cur->ns : xmlSearchNs(ctx->doc, cur, NULL);
if(ns != NULL && !xmlC14NIsXmlNs(ns) && xmlListSearch(list, ns) == NULL) {
if(!xmlExcC14NIsRendered(ctx, ns)) {
xmlListInsert(list, ns);
xmlXPathNodeSetAdd(ctx->ns_rendered, (xmlNodePtr)ns);
}
}
attr = cur->properties;
while (attr != NULL) {
/*
* todo: do we need to check that attribute is visible and has non
* default namespace
*/
if(xmlC14NIsVisible(ctx, attr)) {
ns = (attr->ns != NULL) ? attr->ns : xmlSearchNs(ctx->doc, cur, NULL);
if(ns != NULL && xmlC14NIsVisible(ctx, attr) && !xmlC14NIsXmlNs(ns)) {
if(xmlListSearch(list, ns) == NULL &&
!xmlExcC14NIsRendered(ctx, ns)) {
xmlListInsert(list, ns);
xmlXPathNodeSetAdd(ctx->ns_rendered, (xmlNodePtr)ns);
}
}
}
attr = attr->next;
}
/*
* Next add all inclusive namespaces if needed.
*/
if(ctx->inclusive_ns_prefixes != NULL) {
int i;
xmlChar *prefix;
for(i = 0; ctx->inclusive_ns_prefixes[i] != NULL; ++i) {
prefix = ctx->inclusive_ns_prefixes[i];
/*
* Special values for namespace with empty prefix
*/
if(xmlStrEqual(prefix, BAD_CAST "#default") || xmlStrEqual(prefix, BAD_CAST "")) {
prefix = NULL;
}
ns = xmlSearchNs(ctx->doc, cur, prefix);
if(ns != NULL && !xmlC14NIsXmlNs(ns)) {
if(xmlListSearch(list, ns) == NULL &&
!xmlExcC14NIsRendered(ctx, ns)) {
xmlListInsert(list, ns);
xmlXPathNodeSetAdd(ctx->ns_rendered, (xmlNodePtr)ns);
}
}
}
}
/*
* print out all elements from list
*/
xmlListWalk(list, (xmlListWalker)xmlC14NPrintNamespaces, (const void*)ctx);
/*
* Cleanup
*/
xmlListDelete(list);
return(0);
}
/**
* xmlC14NAttrsCompare:
* @attr1: the pointer to first attr
* @attr2: the pointer to second attr
*
* Prints the given attribute to the output buffer from C14N context.
*
* Returns -1 if attr1 < attr2, 0 if attr1 == attr2 or 1 if attr1 > attr2.
*/
static int
xmlC14NAttrsCompare(xmlAttrPtr attr1, xmlAttrPtr attr2) {
int ret = 0;
/*
* Simple cases
*/
if(attr1 == attr2) return(0);
if(attr1 == NULL) return(-1);
if(attr2 == NULL) return(1);
if(attr1->ns == attr2->ns) {
return(xmlStrcmp(attr1->name, attr2->name));
}
/*
* Attributes in the default namespace are first
* because the default namespace is not applied to
* unqualified attributes
*/
if(attr1->ns == NULL) return(-1);
if(attr2->ns == NULL) return(1);
if(attr1->ns->prefix == NULL) return(-1);
if(attr2->ns->prefix == NULL) return(1);
ret = xmlStrcmp(attr1->ns->href, attr2->ns->href);
if(ret == 0) {
ret = xmlStrcmp(attr1->name, attr2->name);
}
return(ret);
}
/**
* xmlC14NPrintAttrs:
* @attr: the pointer to attr
* @ctx: the C14N context
*
* Prints out canonical attribute urrent node to the
* buffer from C14N context as follows
*
* Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
*
* Returns 1 on success or 0 on fail.
*/
static int
xmlC14NPrintAttrs(const xmlAttrPtr attr, xmlC14NCtxPtr ctx) {
xmlChar *value;
xmlChar *buffer;
if(attr == NULL || ctx == NULL) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NPrintAttrs: attr == NULL or ctx == NULL\n");
#endif
return(0);
}
xmlOutputBufferWriteString(ctx->buf, " ");
if(attr->ns != NULL && xmlStrlen(attr->ns->prefix) > 0) {
xmlOutputBufferWriteString(ctx->buf, (const char *) attr->ns->prefix);
xmlOutputBufferWriteString(ctx->buf, ":");
}
xmlOutputBufferWriteString(ctx->buf, (const char *) attr->name);
xmlOutputBufferWriteString(ctx->buf, "=\"");
value = xmlNodeListGetString(attr->doc, attr->children, 1);
/* todo: should we log an error if value==NULL ? */
if(value != NULL) {
buffer = xmlC11NNormalizeAttr(value);
xmlFree(value);
if (buffer != NULL) {
xmlOutputBufferWriteString(ctx->buf, (const char *)buffer);
xmlFree(buffer);
} else {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NPrintAttrs: xmlC11NNormalizeAttr failed\n");
#endif
return(0);
}
}
xmlOutputBufferWriteString(ctx->buf, "\"");
return(1);
}
/**
* xmlC14NProcessAttrsAxis:
* @ctx: the C14N context
* @cur: the current node
*
* Prints out canonical attribute axis of the current node to the
* buffer from C14N context as follows
*
* Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
*
* Attribute Axis
* In lexicographic order (ascending), process each node that
* is in the element's attribute axis and in the node-set.
*
* The processing of an element node E MUST be modified slightly
* when an XPath node-set is given as input and the element's
* parent is omitted from the node-set.
*
*
* Exclusive XML Canonicalization v 1.0 (http://www.w3.org/TR/xml-exc-c14n)
*
* Canonical XML applied to a document subset requires the search of the
* ancestor nodes of each orphan element node for attributes in the xml
* namespace, such as xml:lang and xml:space. These are copied into the
* element node except if a declaration of the same attribute is already
* in the attribute axis of the element (whether or not it is included in
* the document subset). This search and copying are omitted from the
* Exclusive XML Canonicalization method.
*
* Returns 0 on success or -1 on fail.
*/
static int
xmlC14NProcessAttrsAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur) {
xmlAttrPtr attr;
xmlListPtr list;
if(ctx == NULL || cur == NULL || cur->type != XML_ELEMENT_NODE) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessAttrsAxis: Null context or node pointer or type != XML_ELEMENT_NODE.\n");
#endif
return(-1);
}
/*
* Create a sorted list to store element attributes
*/
list = xmlListCreate(NULL, (xmlListDataCompare)xmlC14NAttrsCompare);
if(list == NULL) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessAttrsAxis: list creation failed\n");
#endif
return(-1);
}
/*
* Add all visible attributes from current node.
*/
attr = cur->properties;
while (attr != NULL) {
/* check that attribute is visible */
if(xmlC14NIsVisible(ctx, attr)) {
xmlListInsert(list, attr);
}
attr = attr->next;
}
/*
* include attributes in "xml" namespace defined in ancestors
* (only for non-exclusive XML Canonicalization)
*/
if(!ctx->exclusive && cur->parent != NULL && !xmlC14NIsVisible(ctx, cur->parent)) {
/*
* If XPath node-set is not specified then the parent is always
* visible!
*/
cur = cur->parent;
while(cur != NULL) {
attr = cur->properties;
while (attr != NULL) {
if(attr->ns != NULL && xmlStrEqual(attr->ns->prefix, BAD_CAST "xml")) {
if(xmlListSearch(list, attr) == NULL) {
xmlListInsert(list, attr);
}
}
attr = attr->next;
}
cur = cur->parent;
}
}
/*
* print out all elements from list
*/
xmlListWalk(list, (xmlListWalker)xmlC14NPrintAttrs, (const void*)ctx);
/*
* Cleanup
*/
xmlListDelete(list);
return(0);
}
/**
* xmlC14NCheckForRelativeNamespaces:
* @ctx: the C14N context
* @cur: the current element node
*
* Checks that current element node has no relative namespaces defined
*
* Returns 0 if the node has no relative namespaces or -1 otherwise.
*/
static int
xmlC14NCheckForRelativeNamespaces(xmlC14NCtxPtr ctx, xmlNodePtr cur) {
xmlNsPtr ns;
if(ctx == NULL || cur == NULL || cur->type != XML_ELEMENT_NODE) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NCheckForRelativeNamespaces: Null context or node pointer or type != XML_ELEMENT_NODE.\n");
#endif
return(-1);
}
ns = cur->nsDef;
while(ns != NULL) {
if(xmlStrlen(ns->href) > 0) {
xmlURIPtr uri;
uri = xmlParseURI((const char *) ns->href);
if(uri == NULL) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NCheckForRelativeNamespaces: unable to parse uri=\"%s\".\n", ns->href);
#endif
return(-1);
}
if(xmlStrlen((const xmlChar *) uri->scheme) == 0) {
xmlFreeURI(uri);
return(-1);
}
if(!xmlStrEqual((const xmlChar *) uri->scheme, BAD_CAST "urn") && xmlStrlen((const xmlChar *) uri->server) == 0) {
xmlFreeURI(uri);
return(-1);
}
xmlFreeURI(uri);
}
ns = ns->next;
}
return(0);
}
/**
* xmlC14NProcessElementNode:
* @ctx: the pointer to C14N context object
* @cur: the node to process
*
* Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
*
* Element Nodes
* If the element is not in the node-set, then the result is obtained
* by processing the namespace axis, then the attribute axis, then
* processing the child nodes of the element that are in the node-set
* (in document order). If the element is in the node-set, then the result
* is an open angle bracket (<), the element QName, the result of
* processing the namespace axis, the result of processing the attribute
* axis, a close angle bracket (>), the result of processing the child
* nodes of the element that are in the node-set (in document order), an
* open angle bracket, a forward slash (/), the element QName, and a close
* angle bracket.
*
* Returns non-negative value on success or negative value on fail
*/
static int
xmlC14NProcessElementNode(xmlC14NCtxPtr ctx, xmlNodePtr cur, int visible) {
int ret;
int ns_rendered_pos = 0;
if(ctx == NULL || cur == NULL || cur->type != XML_ELEMENT_NODE) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessElementNode: Null context or node pointer or type != XML_ELEMENT_NODE.\n");
#endif
return(-1);
}
/*
* Check relative relative namespaces:
* implementations of XML canonicalization MUST report an operation
* failure on documents containing relative namespace URIs.
*/
if(xmlC14NCheckForRelativeNamespaces(ctx, cur) < 0) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessElementNode: xmlC14NCheckForRelativeNamespaces failed.\n");
#endif
return(-1);
}
/*
* Save ns_rendered stack position for exclusive
* processing
*/
if(ctx->exclusive && ctx->ns_rendered != NULL) {
ns_rendered_pos = ctx->ns_rendered->nodeNr;
}
if(visible) {
if(ctx->parent_is_doc) {
ctx->pos = XMLC14N_INSIDE_DOCUMENT_ELEMENT;
}
xmlOutputBufferWriteString(ctx->buf, "<");
if(cur->ns != NULL && xmlStrlen(cur->ns->prefix) > 0) {
xmlOutputBufferWriteString(ctx->buf, (const char *)cur->ns->prefix);
xmlOutputBufferWriteString(ctx->buf, ":");
}
xmlOutputBufferWriteString(ctx->buf, (const char *)cur->name);
if(ctx->exclusive) {
ret = xmlExcC14NProcessNamespacesAxis(ctx, cur);
} else {
ret = xmlC14NProcessNamespacesAxis(ctx, cur);
}
if(ret < 0) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessElementNode: xmlC14NProcessNamespacesAxis failed.\n");
#endif
return(-1);
}
ret = xmlC14NProcessAttrsAxis(ctx, cur);
if(ret < 0) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessElementNode: xmlC14NProcessAttrsAxis failed.\n");
#endif
return(-1);
}
xmlOutputBufferWriteString(ctx->buf, ">");
}
if (cur->children != NULL) {
ret = xmlC14NProcessNodeList(ctx, cur->children);
if(ret < 0) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessElementNode: xmlC14NProcessNodeList failed.\n");
#endif
return(-1);
}
}
if(visible) {
xmlOutputBufferWriteString(ctx->buf, "</");
if(cur->ns != NULL && xmlStrlen(cur->ns->prefix) > 0) {
xmlOutputBufferWriteString(ctx->buf, (const char *)cur->ns->prefix);
xmlOutputBufferWriteString(ctx->buf, ":");
}
xmlOutputBufferWriteString(ctx->buf, (const char *)cur->name);
xmlOutputBufferWriteString(ctx->buf, ">");
if(ctx->parent_is_doc) {
ctx->pos = XMLC14N_AFTER_DOCUMENT_ELEMENT;
}
}
/*
* Restore ns_rendered stack position for exclusive
* processing
*/
if(ctx->exclusive && ctx->ns_rendered != NULL) {
ctx->ns_rendered->nodeNr = ns_rendered_pos;
}
return(0);
}
/**
* xmlC14NProcessNode:
* @ctx: the pointer to C14N context object
* @cur: the node to process
*
* Processes the given node
*
* Returns non-negative value on success or negative value on fail
*/
static int
xmlC14NProcessNode(xmlC14NCtxPtr ctx, xmlNodePtr cur) {
int ret = 0;
int visible;
if(ctx == NULL || cur == NULL) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessNode: Null context or node pointer.\n");
#endif
return(-1);
}
visible = xmlC14NIsVisible(ctx, cur);
switch(cur->type) {
case XML_ELEMENT_NODE:
ret = xmlC14NProcessElementNode(ctx, cur, visible);
break;
case XML_CDATA_SECTION_NODE:
case XML_TEXT_NODE:
/*
* Text Nodes
* the string value, except all ampersands are replaced
* by &amp;, all open angle brackets (<) are replaced by &lt;, all closing
* angle brackets (>) are replaced by &gt;, and all #xD characters are
* replaced by &#xD;.
*/
/* cdata sections are processed as text nodes */
/* todo: verify that cdata sections are included in XPath nodes set */
if(visible && cur->content != NULL) {
xmlChar *buffer;
#ifndef XML_USE_BUFFER_CONTENT
buffer = xmlC11NNormalizeText(cur->content);
#else
buffer = xmlC11NNormalizeText(xmlBufferContent(cur->content));
#endif
if(buffer != NULL) {
xmlOutputBufferWriteString(ctx->buf, (const char *)buffer);
xmlFree(buffer);
} else {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessNode: xmlC11NNormalizeText() failed\n");
#endif
return(-1);
}
}
break;
case XML_PI_NODE:
/*
* Processing Instruction (PI) Nodes-
* The opening PI symbol (<?), the PI target name of the node,
* a leading space and the string value if it is not empty, and
* the closing PI symbol (?>). If the string value is empty,
* then the leading space is not added. Also, a trailing #xA is
* rendered after the closing PI symbol for PI children of the
* root node with a lesser document order than the document
* element, and a leading #xA is rendered before the opening PI
* symbol of PI children of the root node with a greater document
* order than the document element.
*/
if(visible) {
if(ctx->pos == XMLC14N_AFTER_DOCUMENT_ELEMENT) {
xmlOutputBufferWriteString(ctx->buf, "\x0A<?");
} else {
xmlOutputBufferWriteString(ctx->buf, "<?");
}
xmlOutputBufferWriteString(ctx->buf, (const char *)cur->name);
if(cur->content != NULL && *(cur->content) != '\0') {
xmlChar *buffer;
xmlOutputBufferWriteString(ctx->buf, " ");
/* todo: do we need to normalize pi? */
#ifndef XML_USE_BUFFER_CONTENT
buffer = xmlC11NNormalizePI(cur->content);
#else
buffer = xmlC11NNormalizePI(xmlBufferContent(cur->content));
#endif
if (buffer != NULL) {
xmlOutputBufferWriteString(ctx->buf, (const char *)buffer);
xmlFree(buffer);
} else {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessNode: xmlC11NNormalizePI() failed\n");
#endif
return(-1);
}
}
if(ctx->pos == XMLC14N_BEFORE_DOCUMENT_ELEMENT) {
xmlOutputBufferWriteString(ctx->buf, "?>\x0A");
} else {
xmlOutputBufferWriteString(ctx->buf, "?>");
}
}
break;
case XML_COMMENT_NODE:
/*
* Comment Nodes
* Nothing if generating canonical XML without comments. For
* canonical XML with comments, generate the opening comment
* symbol (<!--), the string value of the node, and the
* closing comment symbol (-->). Also, a trailing #xA is rendered
* after the closing comment symbol for comment children of the
* root node with a lesser document order than the document
* element, and a leading #xA is rendered before the opening
* comment symbol of comment children of the root node with a
* greater document order than the document element. (Comment
* children of the root node represent comments outside of the
* top-level document element and outside of the document type
* declaration).
*/
if(visible && ctx->with_comments) {
if(ctx->pos == XMLC14N_AFTER_DOCUMENT_ELEMENT) {
xmlOutputBufferWriteString(ctx->buf, "\x0A<!--");
} else {
xmlOutputBufferWriteString(ctx->buf, "<!--");
}
if(cur->content != NULL) {
xmlChar *buffer;
/* todo: do we need to normalize comment? */
#ifndef XML_USE_BUFFER_CONTENT
buffer = xmlC11NNormalizeComment(cur->content);
#else
buffer = xmlC11NNormalizeString(xmlBufferContent(cur->content));
#endif
if (buffer != NULL) {
xmlOutputBufferWriteString(ctx->buf, (const char *)buffer);
xmlFree(buffer);
} else {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessNode: xmlC11NNormalizeComment() failed\n");
#endif
return(-1);
}
}
if(ctx->pos == XMLC14N_BEFORE_DOCUMENT_ELEMENT) {
xmlOutputBufferWriteString(ctx->buf, "-->\x0A");
} else {
xmlOutputBufferWriteString(ctx->buf, "-->");
}
}
break;
case XML_DOCUMENT_NODE:
case XML_DOCUMENT_FRAG_NODE: /* should be processed as document? */
case XML_DOCB_DOCUMENT_NODE: /* should be processed as document? */
case XML_HTML_DOCUMENT_NODE: /* should be processed as document? */
if (cur->children != NULL) {
ctx->pos = XMLC14N_BEFORE_DOCUMENT_ELEMENT;
ctx->parent_is_doc = 1;
ret = xmlC14NProcessNodeList(ctx, cur->children);
}
break;
case XML_ATTRIBUTE_NODE:
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessNode: XML_ATTRIBUTE_NODE is illegal here\n");
return(-1);
case XML_NAMESPACE_DECL:
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessNode: XML_NAMESPACE_DECL is illegal here\n");
return(-1);
case XML_ENTITY_REF_NODE:
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessNode: XML_ENTITY_REF_NODE is illegal here\n");
return(-1);
case XML_ENTITY_NODE:
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessNode: XML_ENTITY_NODE is illegal here\n");
return(-1);
case XML_DOCUMENT_TYPE_NODE:
case XML_NOTATION_NODE:
case XML_DTD_NODE:
case XML_ELEMENT_DECL:
case XML_ATTRIBUTE_DECL:
case XML_ENTITY_DECL:
case XML_XINCLUDE_START:
case XML_XINCLUDE_END:
/*
* should be ignored according to "W3C Canonical XML"
*/
break;
default:
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessNode: unknown node type = %d\n", cur->type);
#endif
return(-1);
}
return(ret);
}
/**
* xmlC14NProcessNodeList:
* @ctx: the pointer to C14N context object
* @cur: the node to start from
*
* Processes all nodes in the row starting from cur.
*
* Returns non-negative value on success or negative value on fail
*/
static int
xmlC14NProcessNodeList(xmlC14NCtxPtr ctx, xmlNodePtr cur) {
int ret;
if(ctx == NULL) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NProcessNodeList: Null context pointer.\n");
#endif
return(-1);
}
for(ret = 0; cur != NULL && ret >= 0; cur = cur->next) {
ret = xmlC14NProcessNode(ctx, cur);
}
return(ret);
}
/**
* xmlC14NFreeCtx:
* @ctx: the pointer to C14N context object
*
* Cleanups the C14N context object.
*/
static void
xmlC14NFreeCtx(xmlC14NCtxPtr ctx) {
if(ctx == NULL) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NFreeCtx: ctx == NULL\n");
#endif
return;
}
if(ctx->ns_rendered != NULL) {
xmlXPathFreeNodeSet(ctx->ns_rendered);
}
xmlFree(ctx);
}
/**
* xmlC14NNewCtx:
* @doc: the XML document for canonization
* @nodes: the nodes set to be included in the canonized image
* or NULL if all document nodes should be included
* @exclusive: the exclusive flag (0 - non-exclusive canonicalization;
* otherwise - exclusive canonicalization)
* @inclusive_ns_prefixe the list of inclusive namespace prefixes
* ended with a NULL or NULL if there is no
* inclusive namespaces (only for exclusive
* canonicalization)
* @with_comments: include comments in the result (!=0) or not (==0)
* @buf: the output buffer to store canonical XML; this
* buffer MUST have encoder==NULL because C14N requires
* UTF-8 output
*
* Creates new C14N context object to store C14N parameters.
*
* Returns pointer to newly created object (success) or NULL (fail)
*/
static xmlC14NCtxPtr
xmlC14NNewCtx(xmlDocPtr doc, xmlNodeSetPtr nodes,
int exclusive, xmlChar **inclusive_ns_prefixes,
int with_comments,
xmlOutputBufferPtr buf) {
xmlC14NCtxPtr ctx;
if(doc == NULL || buf == NULL) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NNewCtx: pointer to document or output buffer is NULL\n");
#endif
return(NULL);
}
/*
* Validate the encoding output buffer encoding
*/
if(buf->encoder != NULL) {
xmlGenericError(xmlGenericErrorContext,
"xmlC14NNewCtx: output buffer encoder != NULL but C14N requires UTF8 output\n");
return(NULL);
}
/*
* Validate the XML document encoding value, if provided.
*/
if(doc->charset != XML_CHAR_ENCODING_UTF8) {
xmlGenericError(xmlGenericErrorContext,
"xmlC14NNewCtx: source document not in UTF8\n");
return(NULL);
}
/*
* Allocate a new xmlC14NCtxPtr and fill the fields.
*/
ctx = (xmlC14NCtxPtr) xmlMalloc(sizeof(xmlC14NCtx));
if (ctx == NULL) {
xmlGenericError(xmlGenericErrorContext,
"xmlC14NNewCtx: malloc failed\n");
return(NULL);
}
memset(ctx, 0, sizeof(xmlC14NCtx));
/*
* initialize C14N context
*/
ctx->doc = doc;
ctx->with_comments = with_comments;
ctx->visible_nodes = nodes;
ctx->buf = buf;
ctx->parent_is_doc = 1;
ctx->pos = XMLC14N_BEFORE_DOCUMENT_ELEMENT;
/*
* Set "exclusive" flag, create a nodes set for namespaces
* stack and remember list of incluseve prefixes
*/
if(exclusive) {
ctx->exclusive = 1;
ctx->ns_rendered = xmlXPathNodeSetCreate(NULL);
ctx->inclusive_ns_prefixes = inclusive_ns_prefixes;
}
return(ctx);
}
/**
* xmlC14NDocSaveTo:
* @doc: the XML document for canonization
* @nodes: the nodes set to be included in the canonized image
* or NULL if all document nodes should be included
* @exclusive: the exclusive flag (0 - non-exclusive canonicalization;
* otherwise - exclusive canonicalization)
* @inclusive_ns_prefixe the list of inclusive namespace prefixes
* ended with a NULL or NULL if there is no
* inclusive namespaces (only for exclusive
* canonicalization, ignored otherwise)
* @with_comments: include comments in the result (!=0) or not (==0)
* @buf: the output buffer to store canonical XML; this
* buffer MUST have encoder==NULL because C14N requires
* UTF-8 output
*
* Dumps the canonized image of given XML document into the provided buffer.
* For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or
* "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)
*
* Returns non-negative value on success or a negative value on fail
*/
int
xmlC14NDocSaveTo(xmlDocPtr doc, xmlNodeSetPtr nodes,
int exclusive, xmlChar **inclusive_ns_prefixes,
int with_comments,
xmlOutputBufferPtr buf) {
xmlC14NCtxPtr ctx;
int ret;
if(buf == NULL || doc == NULL) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NDocSaveTo: null return buffer or doc pointer\n");
#endif
return(-1);
}
/*
* Validate the encoding output buffer encoding
*/
if(buf->encoder != NULL) {
xmlGenericError(xmlGenericErrorContext,
"xmlC14NDocSaveTo: output buffer encoder != NULL but C14N requires UTF8 output\n");
return(-1);
}
ctx = xmlC14NNewCtx(doc, nodes, exclusive, inclusive_ns_prefixes,
with_comments, buf);
if(ctx == NULL) {
xmlGenericError(xmlGenericErrorContext,
"xmlC14NDocSaveTo: unable to create C14N context\n");
return(-1);
}
/*
* Root Node
* The root node is the parent of the top-level document element. The
* result of processing each of its child nodes that is in the node-set
* in document order. The root node does not generate a byte order mark,
* XML declaration, nor anything from within the document type
* declaration.
*/
if(doc->children != NULL) {
ret = xmlC14NProcessNodeList(ctx, doc->children);
if(ret < 0) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NDocSaveTo: process childrens' list failed.\n");
#endif
xmlC14NFreeCtx(ctx);
return(-1);
}
}
/*
* Flush buffer to get number of bytes written
*/
ret = xmlOutputBufferFlush(buf);
if(ret < 0) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NDocSaveTo: buffer flush failed.\n");
#endif
xmlC14NFreeCtx(ctx);
return(-1);
}
/*
* Cleanup
*/
xmlC14NFreeCtx(ctx);
return(ret);
}
/**
* xmlC14NDocDumpMemory:
* @doc: the XML document for canonization
* @nodes: the nodes set to be included in the canonized image
* or NULL if all document nodes should be included
* @exclusive: the exclusive flag (0 - non-exclusive canonicalization;
* otherwise - exclusive canonicalization)
* @inclusive_ns_prefixe the list of inclusive namespace prefixes
* ended with a NULL or NULL if there is no
* inclusive namespaces (only for exclusive
* canonicalization, ignored otherwise)
* @with_comments: include comments in the result (!=0) or not (==0)
* @doc_txt_ptr: the memory pointer for allocated canonical XML text;
* the caller of this functions is responsible for calling
* xmlFree() to free allocated memory
*
* Dumps the canonized image of given XML document into memory.
* For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or
* "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)
*
* Returns the number of bytes written on success or a negative value on fail
*/
int
xmlC14NDocDumpMemory(xmlDocPtr doc, xmlNodeSetPtr nodes,
int exclusive, xmlChar **inclusive_ns_prefixes,
int with_comments,
xmlChar **doc_txt_ptr) {
int ret;
xmlOutputBufferPtr buf;
if (doc_txt_ptr == NULL) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NDocDumpMemory: null return buffer pointer\n");
#endif
return(-1);
}
*doc_txt_ptr = NULL;
/*
* create memory buffer with UTF8 (default) encoding
*/
buf = xmlAllocOutputBuffer(NULL);
if(buf == NULL ) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NDocDumpMemory: failed to allocate output buffer.\n");
#endif
return(-1);
}
/*
* canonize document and write to buffer
*/
ret = xmlC14NDocSaveTo(doc, nodes, exclusive, inclusive_ns_prefixes,
with_comments, buf);
if(ret < 0) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NDocDumpMemory: xmlC14NDocSaveTo failed.\n");
#endif
(void)xmlOutputBufferClose(buf);
return(-1);
}
ret = buf->buffer->use;
if(ret > 0) {
*doc_txt_ptr = xmlStrndup(buf->buffer->content, ret);
}
(void)xmlOutputBufferClose(buf);
if(*doc_txt_ptr == NULL && ret > 0) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NDocDumpMemory: failed to allocate memory for document text representation\n");
#endif
return(-1);
}
return(ret);
}
/**
* xmlC14NDocSave:
* @doc: the XML document for canonization
* @nodes: the nodes set to be included in the canonized image
* or NULL if all document nodes should be included
* @exclusive: the exclusive flag (0 - non-exclusive canonicalization;
* otherwise - exclusive canonicalization)
* @inclusive_ns_prefixe the list of inclusive namespace prefixes
* ended with a NULL or NULL if there is no
* inclusive namespaces (only for exclusive
* canonicalization, ignored otherwise)
* @with_comments: include comments in the result (!=0) or not (==0)
* @filename: the filename to store canonical XML image
* @compression: the compression level (zlib requred):
* -1 - libxml default,
* 0 - uncompressed,
* >0 - compression level
*
* Dumps the canonized image of given XML document into the file.
* For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or
* "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)
*
* Returns the number of bytes written success or a negative value on fail
*/
int
xmlC14NDocSave(xmlDocPtr doc, xmlNodeSetPtr nodes,
int exclusive, xmlChar **inclusive_ns_prefixes,
int with_comments,
const char* filename, int compression) {
xmlOutputBufferPtr buf;
int ret;
if(filename == NULL) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NDocSave: filename is NULL\n");
#endif
return(-1);
}
#ifdef HAVE_ZLIB_H
if(compression < 0) compression = xmlGetCompressMode();
#endif
/*
* save the content to a temp buffer, use default UTF8 encoding.
*/
buf = xmlOutputBufferCreateFilename(filename, NULL, compression);
if (buf == NULL) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NDocSave: unable to create buffer for file=\"%s\" with compressin=%d\n", filename, compression);
#endif
return(-1);
}
/*
* canonize document and write to buffer
*/
ret = xmlC14NDocSaveTo(doc, nodes, exclusive, inclusive_ns_prefixes,
with_comments, buf);
if(ret < 0) {
#ifdef DEBUG_C14N
xmlGenericError(xmlGenericErrorContext,
"xmlC14NDocSave: xmlC14NDocSaveTo failed.\n");
#endif
(void)xmlOutputBufferClose(buf);
return(-1);
}
/*
* get the numbers of bytes written
*/
ret = xmlOutputBufferClose(buf);
return(ret);
}
/*
* Macro used to grow the current buffer.
*/
#define growBufferReentrant() { \
buffer_size *= 2; \
buffer = (xmlChar *) \
xmlRealloc(buffer, buffer_size * sizeof(xmlChar)); \
if (buffer == NULL) { \
perror("realloc failed"); \
return(NULL); \
} \
}
/**
* xmlC11NNormalizeString:
* @input: the input string
* @mode: the normalization mode (attribute, comment, PI or text)
*
* Converts a string to a canonical (normalized) format. The code is stolen
* from xmlEncodeEntitiesReentrant(). Added normalization of \x09, \x0a, \x0A
* and the @mode parameter
*
* Returns a normalized string (caller is responsible for calling xmlFree())
* or NULL if an error occurs
*/
static xmlChar *
xmlC11NNormalizeString(const xmlChar *input, xmlC14NNormalizationMode mode) {
const xmlChar *cur = input;
xmlChar *buffer = NULL;
xmlChar *out = NULL;
int 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) {
perror("malloc failed");
return(NULL);
}
out = buffer;
while (*cur != '\0') {
if (out - buffer > buffer_size - 10) {
int indx = out - buffer;
growBufferReentrant();
out = &buffer[indx];
}
if (*cur == '<' && (mode == XMLC14N_NORMALIZE_ATTR ||
mode == XMLC14N_NORMALIZE_TEXT)) {
*out++ = '&';
*out++ = 'l';
*out++ = 't';
*out++ = ';';
} else if (*cur == '>' && (mode == XMLC14N_NORMALIZE_TEXT)) {
*out++ = '&';
*out++ = 'g';
*out++ = 't';
*out++ = ';';
} else if (*cur == '&' && (mode == XMLC14N_NORMALIZE_ATTR ||
mode == XMLC14N_NORMALIZE_TEXT)) {
*out++ = '&';
*out++ = 'a';
*out++ = 'm';
*out++ = 'p';
*out++ = ';';
} else if (*cur == '"' && (mode == XMLC14N_NORMALIZE_ATTR)) {
*out++ = '&';
*out++ = 'q';
*out++ = 'u';
*out++ = 'o';
*out++ = 't';
*out++ = ';';
} else if (*cur == '\x09' && (mode == XMLC14N_NORMALIZE_ATTR)) {
*out++ = '&';
*out++ = '#';
*out++ = 'x';
*out++ = '9';
*out++ = ';';
} else if (*cur == '\x0A' && (mode == XMLC14N_NORMALIZE_ATTR)) {
*out++ = '&';
*out++ = '#';
*out++ = 'x';
*out++ = 'A';
*out++ = ';';
} else if (*cur == '\x0D' && (mode == XMLC14N_NORMALIZE_ATTR ||
mode == XMLC14N_NORMALIZE_TEXT ||
mode == XMLC14N_NORMALIZE_COMMENT ||
mode == XMLC14N_NORMALIZE_PI)) {
*out++ = '&';
*out++ = '#';
*out++ = 'x';
*out++ = 'D';
*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);
}
#endif /* LIBXML_C14N_ENABLED */