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Posted to commits@nifi.apache.org by al...@apache.org on 2016/07/21 18:44:56 UTC
[37/52] [abbrv] [partial] nifi-minifi-cpp git commit: MINIFI-6: More
infra works
http://git-wip-us.apache.org/repos/asf/nifi-minifi-cpp/blob/7956696e/thirdparty/libxml2/c14n.c
----------------------------------------------------------------------
diff --git a/thirdparty/libxml2/c14n.c b/thirdparty/libxml2/c14n.c
new file mode 100644
index 0000000..ca77f92
--- /dev/null
+++ b/thirdparty/libxml2/c14n.c
@@ -0,0 +1,2238 @@
+/*
+ * "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 <al...@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 */