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freebsd-dev/contrib/apr-util/xml/apr_xml.c
Dimitry Andric 674baa3c4f Update apr-util to 1.6.1. See contrib/apr-util/CHANGES for a summary of 
changes.

MFC after:	2 weeks
X-MFC-With:	r361677
2020-06-01 10:14:45 +00:00

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31 KiB
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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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"
#if defined(HAVE_XMLPARSE_XMLPARSE_H)
#include <xmlparse/xmlparse.h>
#elif defined(HAVE_XMLTOK_XMLPARSE_H)
#include <xmltok/xmlparse.h>
#elif defined(HAVE_XML_XMLPARSE_H)
#include <xml/xmlparse.h>
#else
#include <expat.h>
#endif
#define DEBUG_CR "\r\n"
static const char APR_KW_xmlns[] = { 0x78, 0x6D, 0x6C, 0x6E, 0x73, '\0' };
static const char APR_KW_xmlns_lang[] = { 0x78, 0x6D, 0x6C, 0x3A, 0x6C, 0x61, 0x6E, 0x67, '\0' };
static const char APR_KW_DAV[] = { 0x44, 0x41, 0x56, 0x3A, '\0' };
/* 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] == 0x58 || name[0] == 0x78) && \
(name[1] == 0x4D || name[1] == 0x6D) && \
(name[2] == 0x4C || name[2] == 0x6C) )
/* 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;
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;
}
/* return original prefix given ns index */
static const char * find_prefix_name(const apr_xml_elem *elem, int ns, int parent)
{
/*
** Walk up the tree, looking for a namespace scope that defines this
** prefix.
*/
for (; elem; elem = parent ? elem->parent : NULL) {
apr_xml_ns_scope *ns_scope = elem->ns_scope;
for (; ns_scope; ns_scope = ns_scope->next) {
if (ns_scope->ns == ns)
return ns_scope->prefix;
}
}
/* not found */
return "";
}
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, APR_KW_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 == 0x3A) {
/* 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, APR_KW_xmlns_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, 0x3A);
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, 0x3A);
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, APR_KW_DAV);
parser->xp = XML_ParserCreate(NULL);
if (parser->xp == NULL) {
(*apr_pool_abort_get(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, (int)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 ||
style == APR_XML_X2T_PARSED) {
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;
}
}
else if (style == APR_XML_X2T_PARSED) {
apr_xml_ns_scope *ns_scope = elem->ns_scope;
/* compute size of: ' xmlns:%s="%s"' */
for (; ns_scope; ns_scope = ns_scope->next) {
size += 10 + strlen(find_prefix_name(elem, ns_scope->ns, 0)) +
strlen(APR_XML_GET_URI_ITEM(namespaces, ns_scope->ns));
}
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 if (style == APR_XML_X2T_PARSED) {
/* compute size of: <%s:%s> */
size += 3 + strlen(find_prefix_name(elem, elem->ns, 1)) + strlen(elem->name);
}
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 if (style == APR_XML_X2T_PARSED) {
/* compute size of: ' %s:%s="%s"' */
size += 5 + strlen(find_prefix_name(elem, attr->ns, 1)) + strlen(attr->name) + strlen(attr->value);
}
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, style == APR_XML_X2T_PARSED ? APR_XML_X2T_PARSED : 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 ||
style == APR_XML_X2T_PARSED) {
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 if (style == APR_XML_X2T_PARSED)
len = sprintf(s, "<%s:%s", find_prefix_name(elem, elem->ns, 1), 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 if (style == APR_XML_X2T_PARSED)
len = sprintf(s, " %s:%s=\"%s\"",
find_prefix_name(elem, attr->ns, 1), 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;
}
}
else if (style == APR_XML_X2T_PARSED) {
apr_xml_ns_scope *ns_scope = elem->ns_scope;
for (; ns_scope; ns_scope = ns_scope->next) {
const char *prefix = find_prefix_name(elem, ns_scope->ns, 0);
len = sprintf(s, " xmlns%s%s=\"%s\"",
*prefix ? ":" : "", *prefix ? prefix : "",
APR_XML_GET_URI_ITEM(namespaces, ns_scope->ns));
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,
style == APR_XML_X2T_PARSED ? APR_XML_X2T_PARSED : 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 || style == APR_XML_X2T_PARSED) {
if (elem->ns == APR_XML_NS_NONE)
len = sprintf(s, "</%s>", elem->name);
else if (style == APR_XML_X2T_PARSED)
len = sprintf(s, "</%s:%s>", find_prefix_name(elem, elem->ns, 1), 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;
}
/* convert the element to EBCDIC */
#if APR_CHARSET_EBCDIC
static apr_status_t apr_xml_parser_convert_elem(apr_xml_elem *e,
apr_xlate_t *convset)
{
apr_xml_attr *a;
apr_xml_elem *ec;
apr_text *t;
apr_size_t inbytes_left, outbytes_left;
apr_status_t status;
inbytes_left = outbytes_left = strlen(e->name);
status = apr_xlate_conv_buffer(convset, e->name, &inbytes_left, (char *) e->name, &outbytes_left);
if (status) {
return status;
}
for (t = e->first_cdata.first; t != NULL; t = t->next) {
inbytes_left = outbytes_left = strlen(t->text);
status = apr_xlate_conv_buffer(convset, t->text, &inbytes_left, (char *) t->text, &outbytes_left);
if (status) {
return status;
}
}
for (t = e->following_cdata.first; t != NULL; t = t->next) {
inbytes_left = outbytes_left = strlen(t->text);
status = apr_xlate_conv_buffer(convset, t->text, &inbytes_left, (char *) t->text, &outbytes_left);
if (status) {
return status;
}
}
for (a = e->attr; a != NULL; a = a->next) {
inbytes_left = outbytes_left = strlen(a->name);
status = apr_xlate_conv_buffer(convset, a->name, &inbytes_left, (char *) a->name, &outbytes_left);
if (status) {
return status;
}
inbytes_left = outbytes_left = strlen(a->value);
status = apr_xlate_conv_buffer(convset, a->value, &inbytes_left, (char *) a->value, &outbytes_left);
if (status) {
return status;
}
}
for (ec = e->first_child; ec != NULL; ec = ec->next) {
status = apr_xml_parser_convert_elem(ec, convset);
if (status) {
return status;
}
}
return APR_SUCCESS;
}
/* convert the whole document to EBCDIC */
APU_DECLARE(apr_status_t) apr_xml_parser_convert_doc(apr_pool_t *pool,
apr_xml_doc *pdoc,
apr_xlate_t *convset)
{
apr_status_t status;
/* Don't convert the namespaces: they are constant! */
if (pdoc->namespaces != NULL) {
int i;
apr_array_header_t *namespaces;
namespaces = apr_array_make(pool, pdoc->namespaces->nelts, sizeof(const char *));
if (namespaces == NULL)
return APR_ENOMEM;
for (i = 0; i < pdoc->namespaces->nelts; i++) {
apr_size_t inbytes_left, outbytes_left;
char *ptr = (char *) APR_XML_GET_URI_ITEM(pdoc->namespaces, i);
ptr = apr_pstrdup(pool, ptr);
if ( ptr == NULL)
return APR_ENOMEM;
inbytes_left = outbytes_left = strlen(ptr);
status = apr_xlate_conv_buffer(convset, ptr, &inbytes_left, ptr, &outbytes_left);
if (status) {
return status;
}
apr_xml_insert_uri(namespaces, ptr);
}
pdoc->namespaces = namespaces;
}
return apr_xml_parser_convert_elem(pdoc->root, convset);
}
#endif
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