+++ /dev/null
-/*
- * "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>
- */
-#define IN_LIBXML
-#include "libxml.h"
-#ifdef LIBXML_C14N_ENABLED
-#ifdef LIBXML_OUTPUT_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>
-
-#include "buf.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 _xmlC14NVisibleNsStack {
- int nsCurEnd; /* number of nodes in the set */
- int nsPrevStart; /* the begginning of the stack for previous visible node */
- int nsPrevEnd; /* the end of the stack for previous visible node */
- int nsMax; /* size of the array as allocated */
- xmlNsPtr *nsTab; /* array of ns in no particular order */
- xmlNodePtr *nodeTab; /* array of nodes in no particular order */
-} xmlC14NVisibleNsStack, *xmlC14NVisibleNsStackPtr;
-
-typedef struct _xmlC14NCtx {
- /* input parameters */
- xmlDocPtr doc;
- xmlC14NIsVisibleCallback is_visible_callback;
- void* user_data;
- int with_comments;
- xmlOutputBufferPtr buf;
-
- /* position in the XML document */
- xmlC14NPosition pos;
- int parent_is_doc;
- xmlC14NVisibleNsStackPtr ns_rendered;
-
- /* C14N mode */
- xmlC14NMode mode;
-
- /* exclusive canonicalization */
- xmlChar **inclusive_ns_prefixes;
-
- /* error number */
- int error;
-} xmlC14NCtx, *xmlC14NCtxPtr;
-
-static xmlC14NVisibleNsStackPtr xmlC14NVisibleNsStackCreate (void);
-static void xmlC14NVisibleNsStackDestroy (xmlC14NVisibleNsStackPtr cur);
-static void xmlC14NVisibleNsStackAdd (xmlC14NVisibleNsStackPtr cur,
- xmlNsPtr ns,
- xmlNodePtr node);
-static void xmlC14NVisibleNsStackSave (xmlC14NVisibleNsStackPtr cur,
- xmlC14NVisibleNsStackPtr state);
-static void xmlC14NVisibleNsStackRestore (xmlC14NVisibleNsStackPtr cur,
- xmlC14NVisibleNsStackPtr state);
-static void xmlC14NVisibleNsStackShift (xmlC14NVisibleNsStackPtr cur);
-static int xmlC14NVisibleNsStackFind (xmlC14NVisibleNsStackPtr cur,
- xmlNsPtr ns);
-static int xmlExcC14NVisibleNsStackFind (xmlC14NVisibleNsStackPtr cur,
- xmlNsPtr ns,
- xmlC14NCtxPtr ctx);
-
-static int xmlC14NIsNodeInNodeset (xmlNodeSetPtr nodes,
- xmlNodePtr node,
- xmlNodePtr parent);
-
-
-
-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)
-
-#define xmlC14NIsVisible( ctx, node, parent ) \
- (((ctx)->is_visible_callback != NULL) ? \
- (ctx)->is_visible_callback((ctx)->user_data, \
- (xmlNodePtr)(node), (xmlNodePtr)(parent)) : 1)
-
-#define xmlC14NIsExclusive( ctx ) \
- ( (ctx)->mode == XML_C14N_EXCLUSIVE_1_0 )
-
-/************************************************************************
- * *
- * Some factorized error routines *
- * *
- ************************************************************************/
-
-/**
- * xmlC14NErrMemory:
- * @extra: extra informations
- *
- * Handle a redefinition of memory error
- */
-static void
-xmlC14NErrMemory(const char *extra)
-{
- __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
- XML_ERR_NO_MEMORY, XML_ERR_ERROR, NULL, 0, extra,
- NULL, NULL, 0, 0,
- "Memory allocation failed : %s\n", extra);
-}
-
-/**
- * xmlC14NErrParam:
- * @extra: extra informations
- *
- * Handle a redefinition of param error
- */
-static void
-xmlC14NErrParam(const char *extra)
-{
- __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
- XML_ERR_INTERNAL_ERROR, XML_ERR_ERROR, NULL, 0, extra,
- NULL, NULL, 0, 0,
- "Invalid parameter : %s\n", extra);
-}
-
-/**
- * xmlC14NErrInternal:
- * @extra: extra informations
- *
- * Handle a redefinition of internal error
- */
-static void
-xmlC14NErrInternal(const char *extra)
-{
- __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
- XML_ERR_INTERNAL_ERROR, XML_ERR_ERROR, NULL, 0, extra,
- NULL, NULL, 0, 0,
- "Internal error : %s\n", extra);
-}
-
-/**
- * xmlC14NErrInvalidNode:
- * @extra: extra informations
- *
- * Handle a redefinition of invalid node error
- */
-static void
-xmlC14NErrInvalidNode(const char *node_type, const char *extra)
-{
- __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
- XML_C14N_INVALID_NODE, XML_ERR_ERROR, NULL, 0, extra,
- NULL, NULL, 0, 0,
- "Node %s is invalid here : %s\n", node_type, extra);
-}
-
-/**
- * xmlC14NErrUnknownNode:
- * @extra: extra informations
- *
- * Handle a redefinition of unknown node error
- */
-static void
-xmlC14NErrUnknownNode(int node_type, const char *extra)
-{
- __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
- XML_C14N_UNKNOW_NODE, XML_ERR_ERROR, NULL, 0, extra,
- NULL, NULL, 0, 0,
- "Unknown node type %d found : %s\n", node_type, extra);
-}
-
-/**
- * xmlC14NErrRelativeNamespace:
- * @extra: extra informations
- *
- * Handle a redefinition of relative namespace error
- */
-static void
-xmlC14NErrRelativeNamespace(const char *ns_uri)
-{
- __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
- XML_C14N_RELATIVE_NAMESPACE, XML_ERR_ERROR, NULL, 0, NULL,
- NULL, NULL, 0, 0,
- "Relative namespace UR is invalid here : %s\n", ns_uri);
-}
-
-
-
-/**
- * xmlC14NErr:
- * @ctxt: a C14N evaluation context
- * @node: the context node
- * @error: the erorr code
- * @msg: the message
- * @extra: extra informations
- *
- * Handle a redefinition of attribute error
- */
-static void
-xmlC14NErr(xmlC14NCtxPtr ctxt, xmlNodePtr node, int error,
- const char * msg)
-{
- if (ctxt != NULL)
- ctxt->error = error;
- __xmlRaiseError(NULL, NULL, NULL,
- ctxt, node, XML_FROM_C14N, error,
- XML_ERR_ERROR, NULL, 0,
- NULL, NULL, NULL, 0, 0, "%s", msg);
-}
-
-/************************************************************************
- * *
- * The implementation internals *
- * *
- ************************************************************************/
-#define XML_NAMESPACES_DEFAULT 16
-
-static int
-xmlC14NIsNodeInNodeset(xmlNodeSetPtr nodes, xmlNodePtr node, xmlNodePtr parent) {
- if((nodes != NULL) && (node != NULL)) {
- if(node->type != XML_NAMESPACE_DECL) {
- return(xmlXPathNodeSetContains(nodes, node));
- } else {
- xmlNs ns;
-
- memcpy(&ns, node, sizeof(ns));
-
- /* this is a libxml hack! check xpath.c for details */
- if((parent != NULL) && (parent->type == XML_ATTRIBUTE_NODE)) {
- ns.next = (xmlNsPtr)parent->parent;
- } else {
- ns.next = (xmlNsPtr)parent;
- }
-
- /*
- * If the input is an XPath node-set, then the node-set must explicitly
- * contain every node to be rendered to the canonical form.
- */
- return(xmlXPathNodeSetContains(nodes, (xmlNodePtr)&ns));
- }
- }
- return(1);
-}
-
-static xmlC14NVisibleNsStackPtr
-xmlC14NVisibleNsStackCreate(void) {
- xmlC14NVisibleNsStackPtr ret;
-
- ret = (xmlC14NVisibleNsStackPtr) xmlMalloc(sizeof(xmlC14NVisibleNsStack));
- if (ret == NULL) {
- xmlC14NErrMemory("creating namespaces stack");
- return(NULL);
- }
- memset(ret, 0 , (size_t) sizeof(xmlC14NVisibleNsStack));
- return(ret);
-}
-
-static void
-xmlC14NVisibleNsStackDestroy(xmlC14NVisibleNsStackPtr cur) {
- if(cur == NULL) {
- xmlC14NErrParam("destroying namespaces stack");
- return;
- }
- if(cur->nsTab != NULL) {
- memset(cur->nsTab, 0, cur->nsMax * sizeof(xmlNsPtr));
- xmlFree(cur->nsTab);
- }
- if(cur->nodeTab != NULL) {
- memset(cur->nodeTab, 0, cur->nsMax * sizeof(xmlNodePtr));
- xmlFree(cur->nodeTab);
- }
- memset(cur, 0, sizeof(xmlC14NVisibleNsStack));
- xmlFree(cur);
-
-}
-
-static void
-xmlC14NVisibleNsStackAdd(xmlC14NVisibleNsStackPtr cur, xmlNsPtr ns, xmlNodePtr node) {
- if((cur == NULL) ||
- ((cur->nsTab == NULL) && (cur->nodeTab != NULL)) ||
- ((cur->nsTab != NULL) && (cur->nodeTab == NULL))) {
- xmlC14NErrParam("adding namespace to stack");
- return;
- }
-
- if ((cur->nsTab == NULL) && (cur->nodeTab == NULL)) {
- cur->nsTab = (xmlNsPtr*) xmlMalloc(XML_NAMESPACES_DEFAULT * sizeof(xmlNsPtr));
- cur->nodeTab = (xmlNodePtr*) xmlMalloc(XML_NAMESPACES_DEFAULT * sizeof(xmlNodePtr));
- if ((cur->nsTab == NULL) || (cur->nodeTab == NULL)) {
- xmlC14NErrMemory("adding node to stack");
- return;
- }
- memset(cur->nsTab, 0 , XML_NAMESPACES_DEFAULT * sizeof(xmlNsPtr));
- memset(cur->nodeTab, 0 , XML_NAMESPACES_DEFAULT * sizeof(xmlNodePtr));
- cur->nsMax = XML_NAMESPACES_DEFAULT;
- } else if(cur->nsMax == cur->nsCurEnd) {
- void *tmp;
- int tmpSize;
-
- tmpSize = 2 * cur->nsMax;
- tmp = xmlRealloc(cur->nsTab, tmpSize * sizeof(xmlNsPtr));
- if (tmp == NULL) {
- xmlC14NErrMemory("adding node to stack");
- return;
- }
- cur->nsTab = (xmlNsPtr*)tmp;
-
- tmp = xmlRealloc(cur->nodeTab, tmpSize * sizeof(xmlNodePtr));
- if (tmp == NULL) {
- xmlC14NErrMemory("adding node to stack");
- return;
- }
- cur->nodeTab = (xmlNodePtr*)tmp;
-
- cur->nsMax = tmpSize;
- }
- cur->nsTab[cur->nsCurEnd] = ns;
- cur->nodeTab[cur->nsCurEnd] = node;
-
- ++cur->nsCurEnd;
-}
-
-static void
-xmlC14NVisibleNsStackSave(xmlC14NVisibleNsStackPtr cur, xmlC14NVisibleNsStackPtr state) {
- if((cur == NULL) || (state == NULL)) {
- xmlC14NErrParam("saving namespaces stack");
- return;
- }
-
- state->nsCurEnd = cur->nsCurEnd;
- state->nsPrevStart = cur->nsPrevStart;
- state->nsPrevEnd = cur->nsPrevEnd;
-}
-
-static void
-xmlC14NVisibleNsStackRestore(xmlC14NVisibleNsStackPtr cur, xmlC14NVisibleNsStackPtr state) {
- if((cur == NULL) || (state == NULL)) {
- xmlC14NErrParam("restoring namespaces stack");
- return;
- }
- cur->nsCurEnd = state->nsCurEnd;
- cur->nsPrevStart = state->nsPrevStart;
- cur->nsPrevEnd = state->nsPrevEnd;
-}
-
-static void
-xmlC14NVisibleNsStackShift(xmlC14NVisibleNsStackPtr cur) {
- if(cur == NULL) {
- xmlC14NErrParam("shifting namespaces stack");
- return;
- }
- cur->nsPrevStart = cur->nsPrevEnd;
- cur->nsPrevEnd = cur->nsCurEnd;
-}
-
-static int
-xmlC14NStrEqual(const xmlChar *str1, const xmlChar *str2) {
- if (str1 == str2) return(1);
- if (str1 == NULL) return((*str2) == '\0');
- if (str2 == NULL) return((*str1) == '\0');
- do {
- if (*str1++ != *str2) return(0);
- } while (*str2++);
- return(1);
-}
-
-/**
- * xmlC14NVisibleNsStackFind:
- * @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
-xmlC14NVisibleNsStackFind(xmlC14NVisibleNsStackPtr cur, xmlNsPtr ns)
-{
- int i;
- const xmlChar *prefix;
- const xmlChar *href;
- int has_empty_ns;
-
- if(cur == NULL) {
- xmlC14NErrParam("searching namespaces stack (c14n)");
- return (0);
- }
-
- /*
- * if the default namespace xmlns="" is not defined yet then
- * we do not want to print it out
- */
- prefix = ((ns == NULL) || (ns->prefix == NULL)) ? BAD_CAST "" : ns->prefix;
- href = ((ns == NULL) || (ns->href == NULL)) ? BAD_CAST "" : ns->href;
- has_empty_ns = (xmlC14NStrEqual(prefix, NULL) && xmlC14NStrEqual(href, NULL));
-
- if (cur->nsTab != NULL) {
- int start = (has_empty_ns) ? 0 : cur->nsPrevStart;
- for (i = cur->nsCurEnd - 1; i >= start; --i) {
- xmlNsPtr ns1 = cur->nsTab[i];
-
- if(xmlC14NStrEqual(prefix, (ns1 != NULL) ? ns1->prefix : NULL)) {
- return(xmlC14NStrEqual(href, (ns1 != NULL) ? ns1->href : NULL));
- }
- }
- }
- return(has_empty_ns);
-}
-
-static int
-xmlExcC14NVisibleNsStackFind(xmlC14NVisibleNsStackPtr cur, xmlNsPtr ns, xmlC14NCtxPtr ctx) {
- int i;
- const xmlChar *prefix;
- const xmlChar *href;
- int has_empty_ns;
-
- if(cur == NULL) {
- xmlC14NErrParam("searching namespaces stack (exc c14n)");
- return (0);
- }
-
- /*
- * if the default namespace xmlns="" is not defined yet then
- * we do not want to print it out
- */
- prefix = ((ns == NULL) || (ns->prefix == NULL)) ? BAD_CAST "" : ns->prefix;
- href = ((ns == NULL) || (ns->href == NULL)) ? BAD_CAST "" : ns->href;
- has_empty_ns = (xmlC14NStrEqual(prefix, NULL) && xmlC14NStrEqual(href, NULL));
-
- if (cur->nsTab != NULL) {
- int start = 0;
- for (i = cur->nsCurEnd - 1; i >= start; --i) {
- xmlNsPtr ns1 = cur->nsTab[i];
-
- if(xmlC14NStrEqual(prefix, (ns1 != NULL) ? ns1->prefix : NULL)) {
- if(xmlC14NStrEqual(href, (ns1 != NULL) ? ns1->href : NULL)) {
- return(xmlC14NIsVisible(ctx, ns1, cur->nodeTab[i]));
- } else {
- return(0);
- }
- }
- }
- }
- return(has_empty_ns);
-}
-
-
-
-
-/**
- * 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, XML_XML_NAMESPACE)));
-}
-
-
-/**
- * xmlC14NNsCompare:
- * @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
-xmlC14NNsCompare(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)) {
- xmlC14NErrParam("writing namespaces");
- 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=");
- }
- if(ns->href != NULL) {
- xmlBufWriteQuotedString(ctx->buf->buffer, ns->href);
- } else {
- 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, int visible)
-{
- xmlNodePtr n;
- xmlNsPtr ns, tmp;
- xmlListPtr list;
- int already_rendered;
- int has_empty_ns = 0;
-
- if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
- xmlC14NErrParam("processing namespaces axis (c14n)");
- return (-1);
- }
-
- /*
- * Create a sorted list to store element namespaces
- */
- list = xmlListCreate(NULL, (xmlListDataCompare) xmlC14NNsCompare);
- if (list == NULL) {
- xmlC14NErrInternal("creating namespaces list (c14n)");
- return (-1);
- }
-
- /* check all namespaces */
- for(n = cur; n != NULL; n = n->parent) {
- for(ns = n->nsDef; ns != NULL; ns = ns->next) {
- tmp = xmlSearchNs(cur->doc, cur, ns->prefix);
-
- if((tmp == ns) && !xmlC14NIsXmlNs(ns) && xmlC14NIsVisible(ctx, ns, cur)) {
- already_rendered = xmlC14NVisibleNsStackFind(ctx->ns_rendered, ns);
- if(visible) {
- xmlC14NVisibleNsStackAdd(ctx->ns_rendered, ns, cur);
- }
- if(!already_rendered) {
- xmlListInsert(list, ns);
- }
- if(xmlStrlen(ns->prefix) == 0) {
- has_empty_ns = 1;
- }
- }
- }
- }
-
- /**
- * 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)
- */
- if(visible && !has_empty_ns) {
- static xmlNs ns_default;
-
- memset(&ns_default, 0, sizeof(ns_default));
- if(!xmlC14NVisibleNsStackFind(ctx->ns_rendered, &ns_default)) {
- xmlC14NPrintNamespaces(&ns_default, ctx);
- }
- }
-
-
- /*
- * 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, int visible)
-{
- xmlNsPtr ns;
- xmlListPtr list;
- xmlAttrPtr attr;
- int already_rendered;
- int has_empty_ns = 0;
- int has_visibly_utilized_empty_ns = 0;
- int has_empty_ns_in_inclusive_list = 0;
-
- if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
- xmlC14NErrParam("processing namespaces axis (exc c14n)");
- return (-1);
- }
-
- if(!xmlC14NIsExclusive(ctx)) {
- xmlC14NErrParam("processing namespaces axis (exc c14n)");
- return (-1);
-
- }
-
- /*
- * Create a sorted list to store element namespaces
- */
- list = xmlListCreate(NULL, (xmlListDataCompare) xmlC14NNsCompare);
- if (list == NULL) {
- xmlC14NErrInternal("creating namespaces list (exc c14n)");
- return (-1);
- }
-
- /*
- * process inclusive namespaces:
- * All namespace nodes appearing on inclusive ns list are
- * handled as provided in Canonical XML
- */
- if(ctx->inclusive_ns_prefixes != NULL) {
- xmlChar *prefix;
- int i;
-
- 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;
- has_empty_ns_in_inclusive_list = 1;
- }
-
- ns = xmlSearchNs(cur->doc, cur, prefix);
- if((ns != NULL) && !xmlC14NIsXmlNs(ns) && xmlC14NIsVisible(ctx, ns, cur)) {
- already_rendered = xmlC14NVisibleNsStackFind(ctx->ns_rendered, ns);
- if(visible) {
- xmlC14NVisibleNsStackAdd(ctx->ns_rendered, ns, cur);
- }
- if(!already_rendered) {
- xmlListInsert(list, ns);
- }
- if(xmlStrlen(ns->prefix) == 0) {
- has_empty_ns = 1;
- }
- }
- }
- }
-
- /* add node namespace */
- if(cur->ns != NULL) {
- ns = cur->ns;
- } else {
- ns = xmlSearchNs(cur->doc, cur, NULL);
- has_visibly_utilized_empty_ns = 1;
- }
- if((ns != NULL) && !xmlC14NIsXmlNs(ns)) {
- if(visible && xmlC14NIsVisible(ctx, ns, cur)) {
- if(!xmlExcC14NVisibleNsStackFind(ctx->ns_rendered, ns, ctx)) {
- xmlListInsert(list, ns);
- }
- }
- if(visible) {
- xmlC14NVisibleNsStackAdd(ctx->ns_rendered, ns, cur);
- }
- if(xmlStrlen(ns->prefix) == 0) {
- has_empty_ns = 1;
- }
- }
-
-
- /* add attributes */
- for(attr = cur->properties; attr != NULL; attr = attr->next) {
- /*
- * we need to check that attribute is visible and has non
- * default namespace (XML Namespaces: "default namespaces
- * do not apply directly to attributes")
- */
- if((attr->ns != NULL) && !xmlC14NIsXmlNs(attr->ns) && xmlC14NIsVisible(ctx, attr, cur)) {
- already_rendered = xmlExcC14NVisibleNsStackFind(ctx->ns_rendered, attr->ns, ctx);
- xmlC14NVisibleNsStackAdd(ctx->ns_rendered, attr->ns, cur);
- if(!already_rendered && visible) {
- xmlListInsert(list, attr->ns);
- }
- if(xmlStrlen(attr->ns->prefix) == 0) {
- has_empty_ns = 1;
- }
- } else if((attr->ns != NULL) && (xmlStrlen(attr->ns->prefix) == 0) && (xmlStrlen(attr->ns->href) == 0)) {
- has_visibly_utilized_empty_ns = 1;
- }
- }
-
- /*
- * Process xmlns=""
- */
- if(visible && has_visibly_utilized_empty_ns &&
- !has_empty_ns && !has_empty_ns_in_inclusive_list) {
- static xmlNs ns_default;
-
- memset(&ns_default, 0, sizeof(ns_default));
-
- already_rendered = xmlExcC14NVisibleNsStackFind(ctx->ns_rendered, &ns_default, ctx);
- if(!already_rendered) {
- xmlC14NPrintNamespaces(&ns_default, ctx);
- }
- } else if(visible && !has_empty_ns && has_empty_ns_in_inclusive_list) {
- static xmlNs ns_default;
-
- memset(&ns_default, 0, sizeof(ns_default));
- if(!xmlC14NVisibleNsStackFind(ctx->ns_rendered, &ns_default)) {
- xmlC14NPrintNamespaces(&ns_default, ctx);
- }
- }
-
-
-
- /*
- * print out all elements from list
- */
- xmlListWalk(list, (xmlListWalker) xmlC14NPrintNamespaces, (const void *) ctx);
-
- /*
- * Cleanup
- */
- xmlListDelete(list);
- return (0);
-}
-
-
-/**
- * xmlC14NIsXmlAttr:
- * @attr: the attr to check
- *
- * Checks whether the given attribute 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
-xmlC14NIsXmlAttr(xmlAttrPtr attr)
-{
- return ((attr->ns != NULL) &&
- (xmlC14NIsXmlNs(attr->ns) != 0));
-}
-
-
-/**
- * xmlC14NAttrsCompare:
- * @attr1: the pointer tls o 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)) {
- xmlC14NErrParam("writing attributes");
- 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(ctx->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 {
- xmlC14NErrInternal("normalizing attributes axis");
- return (0);
- }
- }
- xmlOutputBufferWriteString(ctx->buf, "\"");
- return (1);
-}
-
-/**
- * xmlC14NFindHiddenParentAttr:
- *
- * Finds an attribute in a hidden parent node.
- *
- * Returns a pointer to the attribute node (if found) or NULL otherwise.
- */
-static xmlAttrPtr
-xmlC14NFindHiddenParentAttr(xmlC14NCtxPtr ctx, xmlNodePtr cur, const xmlChar * name, const xmlChar * ns)
-{
- xmlAttrPtr res;
- while((cur != NULL) && (!xmlC14NIsVisible(ctx, cur, cur->parent))) {
- res = xmlHasNsProp(cur, name, ns);
- if(res != NULL) {
- return res;
- }
-
- cur = cur->parent;
- }
-
- return NULL;
-}
-
-/**
- * xmlC14NFixupBaseAttr:
- *
- * Fixes up the xml:base attribute
- *
- * Returns the newly created attribute or NULL
- */
-static xmlAttrPtr
-xmlC14NFixupBaseAttr(xmlC14NCtxPtr ctx, xmlAttrPtr xml_base_attr)
-{
- xmlChar * res = NULL;
- xmlNodePtr cur;
- xmlAttrPtr attr;
- xmlChar * tmp_str;
- xmlChar * tmp_str2;
- int tmp_str_len;
-
- if ((ctx == NULL) || (xml_base_attr == NULL) || (xml_base_attr->parent == NULL)) {
- xmlC14NErrParam("processing xml:base attribute");
- return (NULL);
- }
-
- /* start from current value */
- res = xmlNodeListGetString(ctx->doc, xml_base_attr->children, 1);
- if(res == NULL) {
- xmlC14NErrInternal("processing xml:base attribute - can't get attr value");
- return (NULL);
- }
-
- /* go up the stack until we find a node that we rendered already */
- cur = xml_base_attr->parent->parent;
- while((cur != NULL) && (!xmlC14NIsVisible(ctx, cur, cur->parent))) {
- attr = xmlHasNsProp(cur, BAD_CAST "base", XML_XML_NAMESPACE);
- if(attr != NULL) {
- /* get attr value */
- tmp_str = xmlNodeListGetString(ctx->doc, attr->children, 1);
- if(tmp_str == NULL) {
- xmlFree(res);
-
- xmlC14NErrInternal("processing xml:base attribute - can't get attr value");
- return (NULL);
- }
-
- /* we need to add '/' if our current base uri ends with '..' or '.'
- to ensure that we are forced to go "up" all the time */
- tmp_str_len = xmlStrlen(tmp_str);
- if(tmp_str_len > 1 && tmp_str[tmp_str_len - 2] == '.') {
- tmp_str2 = xmlStrcat(tmp_str, BAD_CAST "/");
- if(tmp_str2 == NULL) {
- xmlFree(tmp_str);
- xmlFree(res);
-
- xmlC14NErrInternal("processing xml:base attribute - can't modify uri");
- return (NULL);
- }
-
- tmp_str = tmp_str2;
- }
-
- /* build uri */
- tmp_str2 = xmlBuildURI(res, tmp_str);
- if(tmp_str2 == NULL) {
- xmlFree(tmp_str);
- xmlFree(res);
-
- xmlC14NErrInternal("processing xml:base attribute - can't construct uri");
- return (NULL);
- }
-
- /* cleanup and set the new res */
- xmlFree(tmp_str);
- xmlFree(res);
- res = tmp_str2;
- }
-
- /* next */
- cur = cur->parent;
- }
-
- /* check if result uri is empty or not */
- if((res == NULL) || xmlStrEqual(res, BAD_CAST "")) {
- xmlFree(res);
- return (NULL);
- }
-
- /* create and return the new attribute node */
- attr = xmlNewNsProp(NULL, xml_base_attr->ns, BAD_CAST "base", res);
- if(attr == NULL) {
- xmlFree(res);
-
- xmlC14NErrInternal("processing xml:base attribute - can't construct attribute");
- return (NULL);
- }
-
- /* done */
- xmlFree(res);
- return (attr);
-}
-
-/**
- * xmlC14NProcessAttrsAxis:
- * @ctx: the C14N context
- * @cur: the current node
- * @parent_visible: the visibility of parent node
- * @all_parents_visible: the visibility of all parent nodes
- *
- * 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, int parent_visible)
-{
- xmlAttrPtr attr;
- xmlListPtr list;
- xmlAttrPtr attrs_to_delete = NULL;
-
- /* special processing for 1.1 spec */
- xmlAttrPtr xml_base_attr = NULL;
- xmlAttrPtr xml_lang_attr = NULL;
- xmlAttrPtr xml_space_attr = NULL;
-
- if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
- xmlC14NErrParam("processing attributes axis");
- return (-1);
- }
-
- /*
- * Create a sorted list to store element attributes
- */
- list = xmlListCreate(NULL, (xmlListDataCompare) xmlC14NAttrsCompare);
- if (list == NULL) {
- xmlC14NErrInternal("creating attributes list");
- return (-1);
- }
-
- switch(ctx->mode) {
- case XML_C14N_1_0:
- /* 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. The method for processing
- * the attribute axis of an element E in the node-set is enhanced. All element nodes along E's
- * ancestor axis are examined for nearest occurrences of attributes in the xml namespace, such
- * as xml:lang and xml:space (whether or not they are in the node-set). From this list of attributes,
- * remove any that are in E's attribute axis (whether or not they are in the node-set). Then,
- * lexicographically merge this attribute list with the nodes of E's attribute axis that are in
- * the node-set. The result of visiting the attribute axis is computed by processing the attribute
- * nodes in this merged attribute list.
- */
-
- /*
- * Add all visible attributes from current node.
- */
- attr = cur->properties;
- while (attr != NULL) {
- /* check that attribute is visible */
- if (xmlC14NIsVisible(ctx, attr, cur)) {
- xmlListInsert(list, attr);
- }
- attr = attr->next;
- }
-
- /*
- * Handle xml attributes
- */
- if (parent_visible && (cur->parent != NULL) &&
- (!xmlC14NIsVisible(ctx, cur->parent, cur->parent->parent)))
- {
- xmlNodePtr tmp;
-
- /*
- * If XPath node-set is not specified then the parent is always
- * visible!
- */
- tmp = cur->parent;
- while (tmp != NULL) {
- attr = tmp->properties;
- while (attr != NULL) {
- if (xmlC14NIsXmlAttr(attr) != 0) {
- if (xmlListSearch(list, attr) == NULL) {
- xmlListInsert(list, attr);
- }
- }
- attr = attr->next;
- }
- tmp = tmp->parent;
- }
- }
-
- /* done */
- break;
- case XML_C14N_EXCLUSIVE_1_0:
- /* attributes in the XML namespace, such as xml:lang and xml:space
- * are not imported into orphan nodes of the document subset
- */
-
- /*
- * Add all visible attributes from current node.
- */
- attr = cur->properties;
- while (attr != NULL) {
- /* check that attribute is visible */
- if (xmlC14NIsVisible(ctx, attr, cur)) {
- xmlListInsert(list, attr);
- }
- attr = attr->next;
- }
-
- /* do nothing special for xml attributes */
- break;
- case XML_C14N_1_1:
- /* The processing of an element node E MUST be modified slightly when an XPath node-set is
- * given as input and some of the element's ancestors are omitted from the node-set.
- *
- * Simple inheritable attributes are attributes that have a value that requires at most a simple
- * redeclaration. This redeclaration is done by supplying a new value in the child axis. The
- * redeclaration of a simple inheritable attribute A contained in one of E's ancestors is done
- * by supplying a value to an attribute Ae inside E with the same name. Simple inheritable attributes
- * are xml:lang and xml:space.
- *
- * The method for processing the attribute axis of an element E in the node-set is hence enhanced.
- * All element nodes along E's ancestor axis are examined for the nearest occurrences of simple
- * inheritable attributes in the xml namespace, such as xml:lang and xml:space (whether or not they
- * are in the node-set). From this list of attributes, any simple inheritable attributes that are
- * already in E's attribute axis (whether or not they are in the node-set) are removed. Then,
- * lexicographically merge this attribute list with the nodes of E's attribute axis that are in
- * the node-set. The result of visiting the attribute axis is computed by processing the attribute
- * nodes in this merged attribute list.
- *
- * The xml:id attribute is not a simple inheritable attribute and no processing of these attributes is
- * performed.
- *
- * The xml:base attribute is not a simple inheritable attribute and requires special processing beyond
- * a simple redeclaration.
- *
- * Attributes in the XML namespace other than xml:base, xml:id, xml:lang, and xml:space MUST be processed
- * as ordinary attributes.
- */
-
- /*
- * Add all visible attributes from current node.
- */
- attr = cur->properties;
- while (attr != NULL) {
- /* special processing for XML attribute kiks in only when we have invisible parents */
- if ((!parent_visible) || (xmlC14NIsXmlAttr(attr) == 0)) {
- /* check that attribute is visible */
- if (xmlC14NIsVisible(ctx, attr, cur)) {
- xmlListInsert(list, attr);
- }
- } else {
- int matched = 0;
-
- /* check for simple inheritance attributes */
- if((!matched) && (xml_lang_attr == NULL) && xmlStrEqual(attr->name, BAD_CAST "lang")) {
- xml_lang_attr = attr;
- matched = 1;
- }
- if((!matched) && (xml_space_attr == NULL) && xmlStrEqual(attr->name, BAD_CAST "space")) {
- xml_space_attr = attr;
- matched = 1;
- }
-
- /* check for base attr */
- if((!matched) && (xml_base_attr == NULL) && xmlStrEqual(attr->name, BAD_CAST "base")) {
- xml_base_attr = attr;
- matched = 1;
- }
-
- /* otherwise, it is a normal attribute, so just check if it is visible */
- if((!matched) && xmlC14NIsVisible(ctx, attr, cur)) {
- xmlListInsert(list, attr);
- }
- }
-
- /* move to the next one */
- attr = attr->next;
- }
-
- /* special processing for XML attribute kiks in only when we have invisible parents */
- if ((parent_visible)) {
-
- /* simple inheritance attributes - copy */
- if(xml_lang_attr == NULL) {
- xml_lang_attr = xmlC14NFindHiddenParentAttr(ctx, cur->parent, BAD_CAST "lang", XML_XML_NAMESPACE);
- }
- if(xml_lang_attr != NULL) {
- xmlListInsert(list, xml_lang_attr);
- }
- if(xml_space_attr == NULL) {
- xml_space_attr = xmlC14NFindHiddenParentAttr(ctx, cur->parent, BAD_CAST "space", XML_XML_NAMESPACE);
- }
- if(xml_space_attr != NULL) {
- xmlListInsert(list, xml_space_attr);
- }
-
- /* base uri attribute - fix up */
- if(xml_base_attr == NULL) {
- /* if we don't have base uri attribute, check if we have a "hidden" one above */
- xml_base_attr = xmlC14NFindHiddenParentAttr(ctx, cur->parent, BAD_CAST "base", XML_XML_NAMESPACE);
- }
- if(xml_base_attr != NULL) {
- xml_base_attr = xmlC14NFixupBaseAttr(ctx, xml_base_attr);
- if(xml_base_attr != NULL) {
- xmlListInsert(list, xml_base_attr);
-
- /* note that we MUST delete returned attr node ourselves! */
- xml_base_attr->next = attrs_to_delete;
- attrs_to_delete = xml_base_attr;
- }
- }
- }
-
- /* done */
- break;
- }
-
- /*
- * print out all elements from list
- */
- xmlListWalk(list, (xmlListWalker) xmlC14NPrintAttrs, (const void *) ctx);
-
- /*
- * Cleanup
- */
- xmlFreePropList(attrs_to_delete);
- 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)) {
- xmlC14NErrParam("checking for relative namespaces");
- return (-1);
- }
-
- ns = cur->nsDef;
- while (ns != NULL) {
- if (xmlStrlen(ns->href) > 0) {
- xmlURIPtr uri;
-
- uri = xmlParseURI((const char *) ns->href);
- if (uri == NULL) {
- xmlC14NErrInternal("parsing namespace uri");
- return (-1);
- }
- if (xmlStrlen((const xmlChar *) uri->scheme) == 0) {
- xmlC14NErrRelativeNamespace(uri->scheme);
- xmlFreeURI(uri);
- return (-1);
- }
- if ((xmlStrcasecmp((const xmlChar *) uri->scheme, BAD_CAST "urn") != 0)
- && (xmlStrcasecmp((const xmlChar *) uri->scheme, BAD_CAST "dav") !=0)
- && (xmlStrlen((const xmlChar *) uri->server) == 0)) {
- xmlC14NErrRelativeNamespace(uri->scheme);
- xmlFreeURI(uri);
- return (-1);
- }
- xmlFreeURI(uri);
- }
- ns = ns->next;
- }
- return (0);
-}
-
-/**
- * xmlC14NProcessElementNode:
- * @ctx: the pointer to C14N context object
- * @cur: the node to process
- * @visible: this node is visible
- * @all_parents_visible: whether all the parents of this node are visible
- *
- * 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;
- xmlC14NVisibleNsStack state;
- int parent_is_doc = 0;
-
- if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
- xmlC14NErrParam("processing element node");
- 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) {
- xmlC14NErrInternal("checking for relative namespaces");
- return (-1);
- }
-
-
- /*
- * Save ns_rendered stack position
- */
- memset(&state, 0, sizeof(state));
- xmlC14NVisibleNsStackSave(ctx->ns_rendered, &state);
-
- if (visible) {
- if (ctx->parent_is_doc) {
- /* save this flag into the stack */
- parent_is_doc = ctx->parent_is_doc;
- ctx->parent_is_doc = 0;
- 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 (!xmlC14NIsExclusive(ctx)) {
- ret = xmlC14NProcessNamespacesAxis(ctx, cur, visible);
- } else {
- ret = xmlExcC14NProcessNamespacesAxis(ctx, cur, visible);
- }
- if (ret < 0) {
- xmlC14NErrInternal("processing namespaces axis");
- return (-1);
- }
- /* todo: shouldn't this go to "visible only"? */
- if(visible) {
- xmlC14NVisibleNsStackShift(ctx->ns_rendered);
- }
-
- ret = xmlC14NProcessAttrsAxis(ctx, cur, visible);
- if (ret < 0) {
- xmlC14NErrInternal("processing attributes axis");
- return (-1);
- }
-
- if (visible) {
- xmlOutputBufferWriteString(ctx->buf, ">");
- }
- if (cur->children != NULL) {
- ret = xmlC14NProcessNodeList(ctx, cur->children);
- if (ret < 0) {
- xmlC14NErrInternal("processing childrens list");
- 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 (parent_is_doc) {
- /* restore this flag from the stack for next node */
- ctx->parent_is_doc = parent_is_doc;
- ctx->pos = XMLC14N_AFTER_DOCUMENT_ELEMENT;
- }
- }
-
- /*
- * Restore ns_rendered stack position
- */
- xmlC14NVisibleNsStackRestore(ctx->ns_rendered, &state);
- 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)) {
- xmlC14NErrParam("processing node");
- return (-1);
- }
-
- visible = xmlC14NIsVisible(ctx, cur, cur->parent);
- 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 &, all open angle brackets (<) are replaced by <, all closing
- * angle brackets (>) are replaced by >, and all #xD characters are
- * replaced by 
.
- */
- /* 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;
-
- buffer = xmlC11NNormalizeText(cur->content);
- if (buffer != NULL) {
- xmlOutputBufferWriteString(ctx->buf,
- (const char *) buffer);
- xmlFree(buffer);
- } else {
- xmlC14NErrInternal("normalizing text node");
- 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? */
- buffer = xmlC11NNormalizePI(cur->content);
- if (buffer != NULL) {
- xmlOutputBufferWriteString(ctx->buf,
- (const char *) buffer);
- xmlFree(buffer);
- } else {
- xmlC14NErrInternal("normalizing pi node");
- 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? */
- buffer = xmlC11NNormalizeComment(cur->content);
- if (buffer != NULL) {
- xmlOutputBufferWriteString(ctx->buf,
- (const char *) buffer);
- xmlFree(buffer);
- } else {
- xmlC14NErrInternal("normalizing comment node");
- 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? */
-#ifdef LIBXML_DOCB_ENABLED
- case XML_DOCB_DOCUMENT_NODE: /* should be processed as document? */
-#endif
-#ifdef LIBXML_HTML_ENABLED
- case XML_HTML_DOCUMENT_NODE: /* should be processed as document? */
-#endif
- 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:
- xmlC14NErrInvalidNode("XML_ATTRIBUTE_NODE", "processing node");
- return (-1);
- case XML_NAMESPACE_DECL:
- xmlC14NErrInvalidNode("XML_NAMESPACE_DECL", "processing node");
- return (-1);
- case XML_ENTITY_REF_NODE:
- xmlC14NErrInvalidNode("XML_ENTITY_REF_NODE", "processing node");
- return (-1);
- case XML_ENTITY_NODE:
- xmlC14NErrInvalidNode("XML_ENTITY_NODE", "processing node");
- 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:
-#ifdef LIBXML_XINCLUDE_ENABLED
- case XML_XINCLUDE_START:
- case XML_XINCLUDE_END:
-#endif
- /*
- * should be ignored according to "W3C Canonical XML"
- */
- break;
- default:
- xmlC14NErrUnknownNode(cur->type, "processing node");
- 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) {
- xmlC14NErrParam("processing node list");
- 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) {
- xmlC14NErrParam("freeing context");
- return;
- }
-
- if (ctx->ns_rendered != NULL) {
- xmlC14NVisibleNsStackDestroy(ctx->ns_rendered);
- }
- xmlFree(ctx);
-}
-
-/**
- * xmlC14NNewCtx:
- * @doc: the XML document for canonization
- * @is_visible_callback:the function to use to determine is node visible
- * or not
- * @user_data: the first parameter for @is_visible_callback function
- * (in most cases, it is nodes set)
- * @mode: the c14n mode (see @xmlC14NMode)
- * @inclusive_ns_prefixe the list of inclusive namespace prefixes
- * ended with a NULL or NULL if there is no
- * inclusive namespaces (only for `
- * 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,
- xmlC14NIsVisibleCallback is_visible_callback, void* user_data,
- xmlC14NMode mode, xmlChar ** inclusive_ns_prefixes,
- int with_comments, xmlOutputBufferPtr buf)
-{
- xmlC14NCtxPtr ctx = NULL;
-
- if ((doc == NULL) || (buf == NULL)) {
- xmlC14NErrParam("creating new context");
- return (NULL);
- }
-
- /*
- * Validate the encoding output buffer encoding
- */
- if (buf->encoder != NULL) {
- xmlC14NErr(ctx, (xmlNodePtr) doc, XML_C14N_REQUIRES_UTF8,
-"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) {
- xmlC14NErr(ctx, (xmlNodePtr) doc, XML_C14N_REQUIRES_UTF8,
- "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) {
- xmlC14NErrMemory("creating context");
- return (NULL);
- }
- memset(ctx, 0, sizeof(xmlC14NCtx));
-
- /*
- * initialize C14N context
- */
- ctx->doc = doc;
- ctx->with_comments = with_comments;
- ctx->is_visible_callback = is_visible_callback;
- ctx->user_data = user_data;
- ctx->buf = buf;
- ctx->parent_is_doc = 1;
- ctx->pos = XMLC14N_BEFORE_DOCUMENT_ELEMENT;
- ctx->ns_rendered = xmlC14NVisibleNsStackCreate();
-
- if(ctx->ns_rendered == NULL) {
- xmlC14NErr(ctx, (xmlNodePtr) doc, XML_C14N_CREATE_STACK,
- "xmlC14NNewCtx: xmlC14NVisibleNsStackCreate failed\n");
- xmlC14NFreeCtx(ctx);
- return (NULL);
- }
-
- /*
- * Set "mode" flag and remember list of incluseve prefixes
- * for exclusive c14n
- */
- ctx->mode = mode;
- if(xmlC14NIsExclusive(ctx)) {
- ctx->inclusive_ns_prefixes = inclusive_ns_prefixes;
- }
- return (ctx);
-}
-
-/**
- * xmlC14NExecute:
- * @doc: the XML document for canonization
- * @is_visible_callback:the function to use to determine is node visible
- * or not
- * @user_data: the first parameter for @is_visible_callback function
- * (in most cases, it is nodes set)
- * @mode: the c14n mode (see @xmlC14NMode)
- * @inclusive_ns_prefixes: 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
-xmlC14NExecute(xmlDocPtr doc, xmlC14NIsVisibleCallback is_visible_callback,
- void* user_data, int mode, xmlChar **inclusive_ns_prefixes,
- int with_comments, xmlOutputBufferPtr buf) {
-
- xmlC14NCtxPtr ctx;
- xmlC14NMode c14n_mode = XML_C14N_1_0;
- int ret;
-
- if ((buf == NULL) || (doc == NULL)) {
- xmlC14NErrParam("executing c14n");
- return (-1);
- }
-
- /* for backward compatibility, we have to have "mode" as "int"
- and here we check that user gives valid value */
- switch(mode) {
- case XML_C14N_1_0:
- case XML_C14N_EXCLUSIVE_1_0:
- case XML_C14N_1_1:
- c14n_mode = (xmlC14NMode)mode;
- break;
- default:
- xmlC14NErrParam("invalid mode for executing c14n");
- return (-1);
- }
-
- /*
- * Validate the encoding output buffer encoding
- */
- if (buf->encoder != NULL) {
- xmlC14NErr(NULL, (xmlNodePtr) doc, XML_C14N_REQUIRES_UTF8,
-"xmlC14NExecute: output buffer encoder != NULL but C14N requires UTF8 output\n");
- return (-1);
- }
-
- ctx = xmlC14NNewCtx(doc, is_visible_callback, user_data,
- c14n_mode, inclusive_ns_prefixes,
- with_comments, buf);
- if (ctx == NULL) {
- xmlC14NErr(NULL, (xmlNodePtr) doc, XML_C14N_CREATE_CTXT,
- "xmlC14NExecute: 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) {
- xmlC14NErrInternal("processing docs children list");
- xmlC14NFreeCtx(ctx);
- return (-1);
- }
- }
-
- /*
- * Flush buffer to get number of bytes written
- */
- ret = xmlOutputBufferFlush(buf);
- if (ret < 0) {
- xmlC14NErrInternal("flushing output buffer");
- xmlC14NFreeCtx(ctx);
- return (-1);
- }
-
- /*
- * Cleanup
- */
- xmlC14NFreeCtx(ctx);
- return (ret);
-}
-
-/**
- * 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
- * @mode: the c14n mode (see @xmlC14NMode)
- * @inclusive_ns_prefixes: 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 mode, xmlChar ** inclusive_ns_prefixes,
- int with_comments, xmlOutputBufferPtr buf) {
- return(xmlC14NExecute(doc,
- (xmlC14NIsVisibleCallback)xmlC14NIsNodeInNodeset,
- nodes,
- mode,
- inclusive_ns_prefixes,
- with_comments,
- buf));
-}
-
-
-/**
- * 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
- * @mode: the c14n mode (see @xmlC14NMode)
- * @inclusive_ns_prefixes: 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 mode, xmlChar ** inclusive_ns_prefixes,
- int with_comments, xmlChar ** doc_txt_ptr)
-{
- int ret;
- xmlOutputBufferPtr buf;
-
- if (doc_txt_ptr == NULL) {
- xmlC14NErrParam("dumping doc to memory");
- return (-1);
- }
-
- *doc_txt_ptr = NULL;
-
- /*
- * create memory buffer with UTF8 (default) encoding
- */
- buf = xmlAllocOutputBuffer(NULL);
- if (buf == NULL) {
- xmlC14NErrMemory("creating output buffer");
- return (-1);
- }
-
- /*
- * canonize document and write to buffer
- */
- ret = xmlC14NDocSaveTo(doc, nodes, mode, inclusive_ns_prefixes,
- with_comments, buf);
- if (ret < 0) {
- xmlC14NErrInternal("saving doc to output buffer");
- (void) xmlOutputBufferClose(buf);
- return (-1);
- }
-
- ret = xmlBufUse(buf->buffer);
- if (ret > 0) {
- *doc_txt_ptr = xmlStrndup(xmlBufContent(buf->buffer), ret);
- }
- (void) xmlOutputBufferClose(buf);
-
- if ((*doc_txt_ptr == NULL) && (ret > 0)) {
- xmlC14NErrMemory("coping canonicanized document");
- 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
- * @mode: the c14n mode (see @xmlC14NMode)
- * @inclusive_ns_prefixes: 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 mode, xmlChar ** inclusive_ns_prefixes,
- int with_comments, const char *filename, int compression)
-{
- xmlOutputBufferPtr buf;
- int ret;
-
- if (filename == NULL) {
- xmlC14NErrParam("saving doc");
- 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) {
- xmlC14NErrInternal("creating temporary filename");
- return (-1);
- }
-
- /*
- * canonize document and write to buffer
- */
- ret = xmlC14NDocSaveTo(doc, nodes, mode, inclusive_ns_prefixes,
- with_comments, buf);
- if (ret < 0) {
- xmlC14NErrInternal("cannicanize document to buffer");
- (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) { \
- xmlC14NErrMemory("growing buffer"); \
- 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 *) xmlMallocAtomic(buffer_size * sizeof(xmlChar));
- if (buffer == NULL) {
- xmlC14NErrMemory("allocating buffer");
- 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_OUTPUT_ENABLED */
-#define bottom_c14n
-#include "elfgcchack.h"
-#endif /* LIBXML_C14N_ENABLED */
projects / reactos.git / blobdiff