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authorhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 01:45:08 -0500
committerhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 01:45:08 -0500
commite8ec7aa8e38a93f5b034ac74cebce5de23710317 (patch)
treeaa031937bf856c1f8d6ad7877b8d2cb0224da5ef /rubbos/app/httpd-2.0.64/srclib/apr-util/xml/apr_xml.c
parentcc40af334e619bb549038238507407866f774f8f (diff)
upload http
JIRA: BOTTLENECK-10 Change-Id: I7598427ff904df438ce77c2819ee48ac75ffa8da Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
Diffstat (limited to 'rubbos/app/httpd-2.0.64/srclib/apr-util/xml/apr_xml.c')
-rw-r--r--rubbos/app/httpd-2.0.64/srclib/apr-util/xml/apr_xml.c920
1 files changed, 920 insertions, 0 deletions
diff --git a/rubbos/app/httpd-2.0.64/srclib/apr-util/xml/apr_xml.c b/rubbos/app/httpd-2.0.64/srclib/apr-util/xml/apr_xml.c
new file mode 100644
index 00000000..4337ca31
--- /dev/null
+++ b/rubbos/app/httpd-2.0.64/srclib/apr-util/xml/apr_xml.c
@@ -0,0 +1,920 @@
+/* Copyright 2000-2005 The Apache Software Foundation or its licensors, as
+ * applicable.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr.h"
+#include "apr_strings.h"
+
+#define APR_WANT_STDIO /* for sprintf() */
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#include "apr_xml.h"
+
+#include "apu_config.h"
+
+#ifdef APR_HAVE_OLD_EXPAT
+#include "xmlparse.h"
+#else
+#include "expat.h"
+#endif
+
+#define DEBUG_CR "\r\n"
+
+/* errors related to namespace processing */
+#define APR_XML_NS_ERROR_UNKNOWN_PREFIX (-1000)
+#define APR_XML_NS_ERROR_INVALID_DECL (-1001)
+
+/* test for a namespace prefix that begins with [Xx][Mm][Ll] */
+#define APR_XML_NS_IS_RESERVED(name) \
+ ( (name[0] == 'X' || name[0] == 'x') && \
+ (name[1] == 'M' || name[1] == 'm') && \
+ (name[2] == 'L' || name[2] == 'l') )
+
+
+/* the real (internal) definition of the parser context */
+struct apr_xml_parser {
+ apr_xml_doc *doc; /* the doc we're parsing */
+ apr_pool_t *p; /* the pool we allocate from */
+ apr_xml_elem *cur_elem; /* current element */
+
+ int error; /* an error has occurred */
+#define APR_XML_ERROR_EXPAT 1
+#define APR_XML_ERROR_PARSE_DONE 2
+/* also: public APR_XML_NS_ERROR_* values (if any) */
+
+ XML_Parser xp; /* the actual (Expat) XML parser */
+ enum XML_Error xp_err; /* stored Expat error code */
+};
+
+/* struct for scoping namespace declarations */
+typedef struct apr_xml_ns_scope {
+ const char *prefix; /* prefix used for this ns */
+ int ns; /* index into namespace table */
+ int emptyURI; /* the namespace URI is the empty string */
+ struct apr_xml_ns_scope *next; /* next scoped namespace */
+} apr_xml_ns_scope;
+
+
+/* return namespace table index for a given prefix */
+static int find_prefix(apr_xml_parser *parser, const char *prefix)
+{
+ apr_xml_elem *elem = parser->cur_elem;
+
+ /*
+ ** Walk up the tree, looking for a namespace scope that defines this
+ ** prefix.
+ */
+ for (; elem; elem = elem->parent) {
+ apr_xml_ns_scope *ns_scope = elem->ns_scope;
+
+ for (ns_scope = elem->ns_scope; ns_scope; ns_scope = ns_scope->next) {
+ if (strcmp(prefix, ns_scope->prefix) == 0) {
+ if (ns_scope->emptyURI) {
+ /*
+ ** It is possible to set the default namespace to an
+ ** empty URI string; this resets the default namespace
+ ** to mean "no namespace." We just found the prefix
+ ** refers to an empty URI, so return "no namespace."
+ */
+ return APR_XML_NS_NONE;
+ }
+
+ return ns_scope->ns;
+ }
+ }
+ }
+
+ /*
+ * If the prefix is empty (""), this means that a prefix was not
+ * specified in the element/attribute. The search that was performed
+ * just above did not locate a default namespace URI (which is stored
+ * into ns_scope with an empty prefix). This means the element/attribute
+ * has "no namespace". We have a reserved value for this.
+ */
+ if (*prefix == '\0') {
+ return APR_XML_NS_NONE;
+ }
+
+ /* not found */
+ return APR_XML_NS_ERROR_UNKNOWN_PREFIX;
+}
+
+static void start_handler(void *userdata, const char *name, const char **attrs)
+{
+ apr_xml_parser *parser = userdata;
+ apr_xml_elem *elem;
+ apr_xml_attr *attr;
+ apr_xml_attr *prev;
+ char *colon;
+ const char *quoted;
+ char *elem_name;
+
+ /* punt once we find an error */
+ if (parser->error)
+ return;
+
+ elem = apr_pcalloc(parser->p, sizeof(*elem));
+
+ /* prep the element */
+ elem->name = elem_name = apr_pstrdup(parser->p, name);
+
+ /* fill in the attributes (note: ends up in reverse order) */
+ while (*attrs) {
+ attr = apr_palloc(parser->p, sizeof(*attr));
+ attr->name = apr_pstrdup(parser->p, *attrs++);
+ attr->value = apr_pstrdup(parser->p, *attrs++);
+ attr->next = elem->attr;
+ elem->attr = attr;
+ }
+
+ /* hook the element into the tree */
+ if (parser->cur_elem == NULL) {
+ /* no current element; this also becomes the root */
+ parser->cur_elem = parser->doc->root = elem;
+ }
+ else {
+ /* this element appeared within the current elem */
+ elem->parent = parser->cur_elem;
+
+ /* set up the child/sibling links */
+ if (elem->parent->last_child == NULL) {
+ /* no first child either */
+ elem->parent->first_child = elem->parent->last_child = elem;
+ }
+ else {
+ /* hook onto the end of the parent's children */
+ elem->parent->last_child->next = elem;
+ elem->parent->last_child = elem;
+ }
+
+ /* this element is now the current element */
+ parser->cur_elem = elem;
+ }
+
+ /* scan the attributes for namespace declarations */
+ for (prev = NULL, attr = elem->attr;
+ attr;
+ attr = attr->next) {
+ if (strncmp(attr->name, "xmlns", 5) == 0) {
+ const char *prefix = &attr->name[5];
+ apr_xml_ns_scope *ns_scope;
+
+ /* test for xmlns:foo= form and xmlns= form */
+ if (*prefix == ':') {
+ /* a namespace prefix declaration must have a
+ non-empty value. */
+ if (attr->value[0] == '\0') {
+ parser->error = APR_XML_NS_ERROR_INVALID_DECL;
+ return;
+ }
+ ++prefix;
+ }
+ else if (*prefix != '\0') {
+ /* advance "prev" since "attr" is still present */
+ prev = attr;
+ continue;
+ }
+
+ /* quote the URI before we ever start working with it */
+ quoted = apr_xml_quote_string(parser->p, attr->value, 1);
+
+ /* build and insert the new scope */
+ ns_scope = apr_pcalloc(parser->p, sizeof(*ns_scope));
+ ns_scope->prefix = prefix;
+ ns_scope->ns = apr_xml_insert_uri(parser->doc->namespaces, quoted);
+ ns_scope->emptyURI = *quoted == '\0';
+ ns_scope->next = elem->ns_scope;
+ elem->ns_scope = ns_scope;
+
+ /* remove this attribute from the element */
+ if (prev == NULL)
+ elem->attr = attr->next;
+ else
+ prev->next = attr->next;
+
+ /* Note: prev will not be advanced since we just removed "attr" */
+ }
+ else if (strcmp(attr->name, "xml:lang") == 0) {
+ /* save away the language (in quoted form) */
+ elem->lang = apr_xml_quote_string(parser->p, attr->value, 1);
+
+ /* remove this attribute from the element */
+ if (prev == NULL)
+ elem->attr = attr->next;
+ else
+ prev->next = attr->next;
+
+ /* Note: prev will not be advanced since we just removed "attr" */
+ }
+ else {
+ /* advance "prev" since "attr" is still present */
+ prev = attr;
+ }
+ }
+
+ /*
+ ** If an xml:lang attribute didn't exist (lang==NULL), then copy the
+ ** language from the parent element (if present).
+ **
+ ** NOTE: elem_size() *depends* upon this pointer equality.
+ */
+ if (elem->lang == NULL && elem->parent != NULL)
+ elem->lang = elem->parent->lang;
+
+ /* adjust the element's namespace */
+ colon = strchr(elem_name, ':');
+ if (colon == NULL) {
+ /*
+ * The element is using the default namespace, which will always
+ * be found. Either it will be "no namespace", or a default
+ * namespace URI has been specified at some point.
+ */
+ elem->ns = find_prefix(parser, "");
+ }
+ else if (APR_XML_NS_IS_RESERVED(elem->name)) {
+ elem->ns = APR_XML_NS_NONE;
+ }
+ else {
+ *colon = '\0';
+ elem->ns = find_prefix(parser, elem->name);
+ elem->name = colon + 1;
+
+ if (APR_XML_NS_IS_ERROR(elem->ns)) {
+ parser->error = elem->ns;
+ return;
+ }
+ }
+
+ /* adjust all remaining attributes' namespaces */
+ for (attr = elem->attr; attr; attr = attr->next) {
+ /*
+ * apr_xml_attr defines this as "const" but we dup'd it, so we
+ * know that we can change it. a bit hacky, but the existing
+ * structure def is best.
+ */
+ char *attr_name = (char *)attr->name;
+
+ colon = strchr(attr_name, ':');
+ if (colon == NULL) {
+ /*
+ * Attributes do NOT use the default namespace. Therefore,
+ * we place them into the "no namespace" category.
+ */
+ attr->ns = APR_XML_NS_NONE;
+ }
+ else if (APR_XML_NS_IS_RESERVED(attr->name)) {
+ attr->ns = APR_XML_NS_NONE;
+ }
+ else {
+ *colon = '\0';
+ attr->ns = find_prefix(parser, attr->name);
+ attr->name = colon + 1;
+
+ if (APR_XML_NS_IS_ERROR(attr->ns)) {
+ parser->error = attr->ns;
+ return;
+ }
+ }
+ }
+}
+
+static void end_handler(void *userdata, const char *name)
+{
+ apr_xml_parser *parser = userdata;
+
+ /* punt once we find an error */
+ if (parser->error)
+ return;
+
+ /* pop up one level */
+ parser->cur_elem = parser->cur_elem->parent;
+}
+
+static void cdata_handler(void *userdata, const char *data, int len)
+{
+ apr_xml_parser *parser = userdata;
+ apr_xml_elem *elem;
+ apr_text_header *hdr;
+ const char *s;
+
+ /* punt once we find an error */
+ if (parser->error)
+ return;
+
+ elem = parser->cur_elem;
+ s = apr_pstrndup(parser->p, data, len);
+
+ if (elem->last_child == NULL) {
+ /* no children yet. this cdata follows the start tag */
+ hdr = &elem->first_cdata;
+ }
+ else {
+ /* child elements exist. this cdata follows the last child. */
+ hdr = &elem->last_child->following_cdata;
+ }
+
+ apr_text_append(parser->p, hdr, s);
+}
+
+static apr_status_t cleanup_parser(void *ctx)
+{
+ apr_xml_parser *parser = ctx;
+
+ XML_ParserFree(parser->xp);
+ parser->xp = NULL;
+
+ return APR_SUCCESS;
+}
+
+#if XML_MAJOR_VERSION > 1
+/* Stop the parser if an entity declaration is hit. */
+static void entity_declaration(void *userData, const XML_Char *entityName,
+ int is_parameter_entity, const XML_Char *value,
+ int value_length, const XML_Char *base,
+ const XML_Char *systemId, const XML_Char *publicId,
+ const XML_Char *notationName)
+{
+ apr_xml_parser *parser = userData;
+
+ XML_StopParser(parser->xp, XML_FALSE);
+}
+#else
+/* A noop default_handler. */
+static void default_handler(void *userData, const XML_Char *s, int len)
+{
+}
+#endif
+
+APU_DECLARE(apr_xml_parser *) apr_xml_parser_create(apr_pool_t *pool)
+{
+ apr_xml_parser *parser = apr_pcalloc(pool, sizeof(*parser));
+
+ parser->p = pool;
+ parser->doc = apr_pcalloc(pool, sizeof(*parser->doc));
+
+ parser->doc->namespaces = apr_array_make(pool, 5, sizeof(const char *));
+
+ /* ### is there a way to avoid hard-coding this? */
+ apr_xml_insert_uri(parser->doc->namespaces, "DAV:");
+
+ parser->xp = XML_ParserCreate(NULL);
+ if (parser->xp == NULL) {
+ (*apr_pool_get_abort(pool))(APR_ENOMEM);
+ return NULL;
+ }
+
+ apr_pool_cleanup_register(pool, parser, cleanup_parser,
+ apr_pool_cleanup_null);
+
+ XML_SetUserData(parser->xp, parser);
+ XML_SetElementHandler(parser->xp, start_handler, end_handler);
+ XML_SetCharacterDataHandler(parser->xp, cdata_handler);
+
+ /* Prevent the "billion laughs" attack against expat by disabling
+ * internal entity expansion. With 2.x, forcibly stop the parser
+ * if an entity is declared - this is safer and a more obvious
+ * failure mode. With older versions, installing a noop
+ * DefaultHandler means that internal entities will be expanded as
+ * the empty string, which is also sufficient to prevent the
+ * attack. */
+#if XML_MAJOR_VERSION > 1
+ XML_SetEntityDeclHandler(parser->xp, entity_declaration);
+#else
+ XML_SetDefaultHandler(parser->xp, default_handler);
+#endif
+
+ return parser;
+}
+
+static apr_status_t do_parse(apr_xml_parser *parser,
+ const char *data, apr_size_t len,
+ int is_final)
+{
+ if (parser->xp == NULL) {
+ parser->error = APR_XML_ERROR_PARSE_DONE;
+ }
+ else {
+ int rv = XML_Parse(parser->xp, data, len, is_final);
+
+ if (rv == 0) {
+ parser->error = APR_XML_ERROR_EXPAT;
+ parser->xp_err = XML_GetErrorCode(parser->xp);
+ }
+ }
+
+ /* ### better error code? */
+ return parser->error ? APR_EGENERAL : APR_SUCCESS;
+}
+
+APU_DECLARE(apr_status_t) apr_xml_parser_feed(apr_xml_parser *parser,
+ const char *data,
+ apr_size_t len)
+{
+ return do_parse(parser, data, len, 0 /* is_final */);
+}
+
+APU_DECLARE(apr_status_t) apr_xml_parser_done(apr_xml_parser *parser,
+ apr_xml_doc **pdoc)
+{
+ char end;
+ apr_status_t status = do_parse(parser, &end, 0, 1 /* is_final */);
+
+ /* get rid of the parser */
+ (void) apr_pool_cleanup_run(parser->p, parser, cleanup_parser);
+
+ if (status)
+ return status;
+
+ if (pdoc != NULL)
+ *pdoc = parser->doc;
+ return APR_SUCCESS;
+}
+
+APU_DECLARE(char *) apr_xml_parser_geterror(apr_xml_parser *parser,
+ char *errbuf,
+ apr_size_t errbufsize)
+{
+ int error = parser->error;
+ const char *msg;
+
+ /* clear our record of an error */
+ parser->error = 0;
+
+ switch (error) {
+ case 0:
+ msg = "No error.";
+ break;
+
+ case APR_XML_NS_ERROR_UNKNOWN_PREFIX:
+ msg = "An undefined namespace prefix was used.";
+ break;
+
+ case APR_XML_NS_ERROR_INVALID_DECL:
+ msg = "A namespace prefix was defined with an empty URI.";
+ break;
+
+ case APR_XML_ERROR_EXPAT:
+ (void) apr_snprintf(errbuf, errbufsize,
+ "XML parser error code: %s (%d)",
+ XML_ErrorString(parser->xp_err), parser->xp_err);
+ return errbuf;
+
+ case APR_XML_ERROR_PARSE_DONE:
+ msg = "The parser is not active.";
+ break;
+
+ default:
+ msg = "There was an unknown error within the XML body.";
+ break;
+ }
+
+ (void) apr_cpystrn(errbuf, msg, errbufsize);
+ return errbuf;
+}
+
+APU_DECLARE(apr_status_t) apr_xml_parse_file(apr_pool_t *p,
+ apr_xml_parser **parser,
+ apr_xml_doc **ppdoc,
+ apr_file_t *xmlfd,
+ apr_size_t buffer_length)
+{
+ apr_status_t rv;
+ char *buffer;
+ apr_size_t length;
+
+ *parser = apr_xml_parser_create(p);
+ if (*parser == NULL) {
+ /* FIXME: returning an error code would be nice,
+ * but we dont get one ;( */
+ return APR_EGENERAL;
+ }
+ buffer = apr_palloc(p, buffer_length);
+ length = buffer_length;
+
+ rv = apr_file_read(xmlfd, buffer, &length);
+
+ while (rv == APR_SUCCESS) {
+ rv = apr_xml_parser_feed(*parser, buffer, length);
+ if (rv != APR_SUCCESS) {
+ return rv;
+ }
+
+ length = buffer_length;
+ rv = apr_file_read(xmlfd, buffer, &length);
+ }
+ if (rv != APR_EOF) {
+ return rv;
+ }
+ rv = apr_xml_parser_done(*parser, ppdoc);
+ *parser = NULL;
+ return rv;
+}
+
+APU_DECLARE(void) apr_text_append(apr_pool_t * p, apr_text_header *hdr,
+ const char *text)
+{
+ apr_text *t = apr_palloc(p, sizeof(*t));
+
+ t->text = text;
+ t->next = NULL;
+
+ if (hdr->first == NULL) {
+ /* no text elements yet */
+ hdr->first = hdr->last = t;
+ }
+ else {
+ /* append to the last text element */
+ hdr->last->next = t;
+ hdr->last = t;
+ }
+}
+
+
+/* ---------------------------------------------------------------
+**
+** XML UTILITY FUNCTIONS
+*/
+
+/*
+** apr_xml_quote_string: quote an XML string
+**
+** Replace '<', '>', and '&' with '&lt;', '&gt;', and '&amp;'.
+** If quotes is true, then replace '"' with '&quot;'.
+**
+** quotes is typically set to true for XML strings that will occur within
+** double quotes -- attribute values.
+*/
+APU_DECLARE(const char *) apr_xml_quote_string(apr_pool_t *p, const char *s,
+ int quotes)
+{
+ const char *scan;
+ apr_size_t len = 0;
+ apr_size_t extra = 0;
+ char *qstr;
+ char *qscan;
+ char c;
+
+ for (scan = s; (c = *scan) != '\0'; ++scan, ++len) {
+ if (c == '<' || c == '>')
+ extra += 3; /* &lt; or &gt; */
+ else if (c == '&')
+ extra += 4; /* &amp; */
+ else if (quotes && c == '"')
+ extra += 5; /* &quot; */
+ }
+
+ /* nothing to do? */
+ if (extra == 0)
+ return s;
+
+ qstr = apr_palloc(p, len + extra + 1);
+ for (scan = s, qscan = qstr; (c = *scan) != '\0'; ++scan) {
+ if (c == '<') {
+ *qscan++ = '&';
+ *qscan++ = 'l';
+ *qscan++ = 't';
+ *qscan++ = ';';
+ }
+ else if (c == '>') {
+ *qscan++ = '&';
+ *qscan++ = 'g';
+ *qscan++ = 't';
+ *qscan++ = ';';
+ }
+ else if (c == '&') {
+ *qscan++ = '&';
+ *qscan++ = 'a';
+ *qscan++ = 'm';
+ *qscan++ = 'p';
+ *qscan++ = ';';
+ }
+ else if (quotes && c == '"') {
+ *qscan++ = '&';
+ *qscan++ = 'q';
+ *qscan++ = 'u';
+ *qscan++ = 'o';
+ *qscan++ = 't';
+ *qscan++ = ';';
+ }
+ else {
+ *qscan++ = c;
+ }
+ }
+
+ *qscan = '\0';
+ return qstr;
+}
+
+/* how many characters for the given integer? */
+#define APR_XML_NS_LEN(ns) ((ns) < 10 ? 1 : (ns) < 100 ? 2 : (ns) < 1000 ? 3 : \
+ (ns) < 10000 ? 4 : (ns) < 100000 ? 5 : \
+ (ns) < 1000000 ? 6 : (ns) < 10000000 ? 7 : \
+ (ns) < 100000000 ? 8 : (ns) < 1000000000 ? 9 : 10)
+
+static apr_size_t text_size(const apr_text *t)
+{
+ apr_size_t size = 0;
+
+ for (; t; t = t->next)
+ size += strlen(t->text);
+ return size;
+}
+
+static apr_size_t elem_size(const apr_xml_elem *elem, int style,
+ apr_array_header_t *namespaces, int *ns_map)
+{
+ apr_size_t size;
+
+ if (style == APR_XML_X2T_FULL || style == APR_XML_X2T_FULL_NS_LANG) {
+ const apr_xml_attr *attr;
+
+ size = 0;
+
+ if (style == APR_XML_X2T_FULL_NS_LANG) {
+ int i;
+
+ /*
+ ** The outer element will contain xmlns:ns%d="%s" attributes
+ ** and an xml:lang attribute, if applicable.
+ */
+
+ for (i = namespaces->nelts; i--;) {
+ /* compute size of: ' xmlns:ns%d="%s"' */
+ size += (9 + APR_XML_NS_LEN(i) + 2 +
+ strlen(APR_XML_GET_URI_ITEM(namespaces, i)) + 1);
+ }
+
+ if (elem->lang != NULL) {
+ /* compute size of: ' xml:lang="%s"' */
+ size += 11 + strlen(elem->lang) + 1;
+ }
+ }
+
+ if (elem->ns == APR_XML_NS_NONE) {
+ /* compute size of: <%s> */
+ size += 1 + strlen(elem->name) + 1;
+ }
+ else {
+ int ns = ns_map ? ns_map[elem->ns] : elem->ns;
+
+ /* compute size of: <ns%d:%s> */
+ size += 3 + APR_XML_NS_LEN(ns) + 1 + strlen(elem->name) + 1;
+ }
+
+ if (APR_XML_ELEM_IS_EMPTY(elem)) {
+ /* insert a closing "/" */
+ size += 1;
+ }
+ else {
+ /*
+ * two of above plus "/":
+ * <ns%d:%s> ... </ns%d:%s>
+ * OR <%s> ... </%s>
+ */
+ size = 2 * size + 1;
+ }
+
+ for (attr = elem->attr; attr; attr = attr->next) {
+ if (attr->ns == APR_XML_NS_NONE) {
+ /* compute size of: ' %s="%s"' */
+ size += 1 + strlen(attr->name) + 2 + strlen(attr->value) + 1;
+ }
+ else {
+ /* compute size of: ' ns%d:%s="%s"' */
+ int ns = ns_map ? ns_map[attr->ns] : attr->ns;
+ size += 3 + APR_XML_NS_LEN(ns) + 1 + strlen(attr->name) + 2 + strlen(attr->value) + 1;
+ }
+ }
+
+ /*
+ ** If the element has an xml:lang value that is *different* from
+ ** its parent, then add the thing in: ' xml:lang="%s"'.
+ **
+ ** NOTE: we take advantage of the pointer equality established by
+ ** the parsing for "inheriting" the xml:lang values from parents.
+ */
+ if (elem->lang != NULL &&
+ (elem->parent == NULL || elem->lang != elem->parent->lang)) {
+ size += 11 + strlen(elem->lang) + 1;
+ }
+ }
+ else if (style == APR_XML_X2T_LANG_INNER) {
+ /*
+ * This style prepends the xml:lang value plus a null terminator.
+ * If a lang value is not present, then we insert a null term.
+ */
+ size = elem->lang ? strlen(elem->lang) + 1 : 1;
+ }
+ else
+ size = 0;
+
+ size += text_size(elem->first_cdata.first);
+
+ for (elem = elem->first_child; elem; elem = elem->next) {
+ /* the size of the child element plus the CDATA that follows it */
+ size += (elem_size(elem, APR_XML_X2T_FULL, NULL, ns_map) +
+ text_size(elem->following_cdata.first));
+ }
+
+ return size;
+}
+
+static char *write_text(char *s, const apr_text *t)
+{
+ for (; t; t = t->next) {
+ apr_size_t len = strlen(t->text);
+ memcpy(s, t->text, len);
+ s += len;
+ }
+ return s;
+}
+
+static char *write_elem(char *s, const apr_xml_elem *elem, int style,
+ apr_array_header_t *namespaces, int *ns_map)
+{
+ const apr_xml_elem *child;
+ apr_size_t len;
+ int ns;
+
+ if (style == APR_XML_X2T_FULL || style == APR_XML_X2T_FULL_NS_LANG) {
+ int empty = APR_XML_ELEM_IS_EMPTY(elem);
+ const apr_xml_attr *attr;
+
+ if (elem->ns == APR_XML_NS_NONE) {
+ len = sprintf(s, "<%s", elem->name);
+ }
+ else {
+ ns = ns_map ? ns_map[elem->ns] : elem->ns;
+ len = sprintf(s, "<ns%d:%s", ns, elem->name);
+ }
+ s += len;
+
+ for (attr = elem->attr; attr; attr = attr->next) {
+ if (attr->ns == APR_XML_NS_NONE)
+ len = sprintf(s, " %s=\"%s\"", attr->name, attr->value);
+ else {
+ ns = ns_map ? ns_map[attr->ns] : attr->ns;
+ len = sprintf(s, " ns%d:%s=\"%s\"", ns, attr->name, attr->value);
+ }
+ s += len;
+ }
+
+ /* add the xml:lang value if necessary */
+ if (elem->lang != NULL &&
+ (style == APR_XML_X2T_FULL_NS_LANG ||
+ elem->parent == NULL ||
+ elem->lang != elem->parent->lang)) {
+ len = sprintf(s, " xml:lang=\"%s\"", elem->lang);
+ s += len;
+ }
+
+ /* add namespace definitions, if required */
+ if (style == APR_XML_X2T_FULL_NS_LANG) {
+ int i;
+
+ for (i = namespaces->nelts; i--;) {
+ len = sprintf(s, " xmlns:ns%d=\"%s\"", i,
+ APR_XML_GET_URI_ITEM(namespaces, i));
+ s += len;
+ }
+ }
+
+ /* no more to do. close it up and go. */
+ if (empty) {
+ *s++ = '/';
+ *s++ = '>';
+ return s;
+ }
+
+ /* just close it */
+ *s++ = '>';
+ }
+ else if (style == APR_XML_X2T_LANG_INNER) {
+ /* prepend the xml:lang value */
+ if (elem->lang != NULL) {
+ len = strlen(elem->lang);
+ memcpy(s, elem->lang, len);
+ s += len;
+ }
+ *s++ = '\0';
+ }
+
+ s = write_text(s, elem->first_cdata.first);
+
+ for (child = elem->first_child; child; child = child->next) {
+ s = write_elem(s, child, APR_XML_X2T_FULL, NULL, ns_map);
+ s = write_text(s, child->following_cdata.first);
+ }
+
+ if (style == APR_XML_X2T_FULL || style == APR_XML_X2T_FULL_NS_LANG) {
+ if (elem->ns == APR_XML_NS_NONE) {
+ len = sprintf(s, "</%s>", elem->name);
+ }
+ else {
+ ns = ns_map ? ns_map[elem->ns] : elem->ns;
+ len = sprintf(s, "</ns%d:%s>", ns, elem->name);
+ }
+ s += len;
+ }
+
+ return s;
+}
+
+APU_DECLARE(void) apr_xml_quote_elem(apr_pool_t *p, apr_xml_elem *elem)
+{
+ apr_text *scan_txt;
+ apr_xml_attr *scan_attr;
+ apr_xml_elem *scan_elem;
+
+ /* convert the element's text */
+ for (scan_txt = elem->first_cdata.first;
+ scan_txt != NULL;
+ scan_txt = scan_txt->next) {
+ scan_txt->text = apr_xml_quote_string(p, scan_txt->text, 0);
+ }
+ for (scan_txt = elem->following_cdata.first;
+ scan_txt != NULL;
+ scan_txt = scan_txt->next) {
+ scan_txt->text = apr_xml_quote_string(p, scan_txt->text, 0);
+ }
+
+ /* convert the attribute values */
+ for (scan_attr = elem->attr;
+ scan_attr != NULL;
+ scan_attr = scan_attr->next) {
+ scan_attr->value = apr_xml_quote_string(p, scan_attr->value, 1);
+ }
+
+ /* convert the child elements */
+ for (scan_elem = elem->first_child;
+ scan_elem != NULL;
+ scan_elem = scan_elem->next) {
+ apr_xml_quote_elem(p, scan_elem);
+ }
+}
+
+/* convert an element to a text string */
+APU_DECLARE(void) apr_xml_to_text(apr_pool_t * p, const apr_xml_elem *elem,
+ int style, apr_array_header_t *namespaces,
+ int *ns_map, const char **pbuf,
+ apr_size_t *psize)
+{
+ /* get the exact size, plus a null terminator */
+ apr_size_t size = elem_size(elem, style, namespaces, ns_map) + 1;
+ char *s = apr_palloc(p, size);
+
+ (void) write_elem(s, elem, style, namespaces, ns_map);
+ s[size - 1] = '\0';
+
+ *pbuf = s;
+ if (psize)
+ *psize = size;
+}
+
+APU_DECLARE(const char *) apr_xml_empty_elem(apr_pool_t * p,
+ const apr_xml_elem *elem)
+{
+ if (elem->ns == APR_XML_NS_NONE) {
+ /*
+ * The prefix (xml...) is already within the prop name, or
+ * the element simply has no prefix.
+ */
+ return apr_psprintf(p, "<%s/>" DEBUG_CR, elem->name);
+ }
+
+ return apr_psprintf(p, "<ns%d:%s/>" DEBUG_CR, elem->ns, elem->name);
+}
+
+/* return the URI's (existing) index, or insert it and return a new index */
+APU_DECLARE(int) apr_xml_insert_uri(apr_array_header_t *uri_array,
+ const char *uri)
+{
+ int i;
+ const char **pelt;
+
+ /* never insert an empty URI; this index is always APR_XML_NS_NONE */
+ if (*uri == '\0')
+ return APR_XML_NS_NONE;
+
+ for (i = uri_array->nelts; i--;) {
+ if (strcmp(uri, APR_XML_GET_URI_ITEM(uri_array, i)) == 0)
+ return i;
+ }
+
+ pelt = apr_array_push(uri_array);
+ *pelt = uri; /* assume uri is const or in a pool */
+ return uri_array->nelts - 1;
+}