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1b6403583b
libxml2/parserInternals.c
Nick Wellnhofer 2608baaf92 parser: Make failure to load main document a warning 
Revert the change that made failures to load the main document an error.

This fixes the --path option of xmllint and xsltproc.

Should fix #733.
2024-06-14 20:06:07 +02:00

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/*
* parserInternals.c : Internal routines (and obsolete ones) needed for the
* XML and HTML parsers.
*
* See Copyright for the status of this software.
*
* daniel@veillard.com
*/
#define IN_LIBXML
#include "libxml.h"
#if defined(_WIN32)
#define XML_DIR_SEP '\\'
#else
#define XML_DIR_SEP '/'
#endif
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <libxml/xmlmemory.h>
#include <libxml/tree.h>
#include <libxml/parser.h>
#include <libxml/parserInternals.h>
#include <libxml/entities.h>
#include <libxml/xmlerror.h>
#include <libxml/encoding.h>
#include <libxml/xmlIO.h>
#include <libxml/uri.h>
#include <libxml/dict.h>
#include <libxml/xmlsave.h>
#ifdef LIBXML_CATALOG_ENABLED
#include <libxml/catalog.h>
#endif
#include <libxml/chvalid.h>
#include <libxml/nanohttp.h>
#define CUR(ctxt) ctxt->input->cur
#define END(ctxt) ctxt->input->end
#include "private/buf.h"
#include "private/enc.h"
#include "private/error.h"
#include "private/io.h"
#include "private/parser.h"
#define XML_MAX_ERRORS 100
/*
* XML_MAX_AMPLIFICATION_DEFAULT is the default maximum allowed amplification
* factor of serialized output after entity expansion.
*/
#define XML_MAX_AMPLIFICATION_DEFAULT 5
/*
* Various global defaults for parsing
*/
/**
* xmlCheckVersion:
* @version: the include version number
*
* check the compiled lib version against the include one.
*/
void
xmlCheckVersion(int version) {
int myversion = LIBXML_VERSION;
xmlInitParser();
if ((myversion / 10000) != (version / 10000)) {
fprintf(stderr,
"Fatal: program compiled against libxml %d using libxml %d\n",
(version / 10000), (myversion / 10000));
} else if ((myversion / 100) < (version / 100)) {
fprintf(stderr,
"Warning: program compiled against libxml %d using older %d\n",
(version / 100), (myversion / 100));
}
}
/************************************************************************
* *
* Some factorized error routines *
* *
************************************************************************/
/**
* xmlCtxtSetErrorHandler:
* @ctxt: an XML parser context
* @handler: error handler
* @data: data for error handler
*
* Register a callback function that will be called on errors and
* warnings. If handler is NULL, the error handler will be deactivated.
*
* This is the recommended way to collect errors from the parser and
* takes precedence over all other error reporting mechanisms.
* These are (in order of precedence):
*
* - per-context structured handler (xmlCtxtSetErrorHandler)
* - per-context structured "serror" SAX handler
* - global structured handler (xmlSetStructuredErrorFunc)
* - per-context generic "error" and "warning" SAX handlers
* - global generic handler (xmlSetGenericErrorFunc)
* - print to stderr
*
* Available since 2.13.0.
*/
void
xmlCtxtSetErrorHandler(xmlParserCtxtPtr ctxt, xmlStructuredErrorFunc handler,
void *data)
{
if (ctxt == NULL)
return;
ctxt->errorHandler = handler;
ctxt->errorCtxt = data;
}
/**
* xmlCtxtErrMemory:
* @ctxt: an XML parser context
*
* Handle an out-of-memory error.
*
* Available since 2.13.0.
*/
void
xmlCtxtErrMemory(xmlParserCtxtPtr ctxt)
{
xmlStructuredErrorFunc schannel = NULL;
xmlGenericErrorFunc channel = NULL;
void *data;
if (ctxt == NULL)
return;
ctxt->errNo = XML_ERR_NO_MEMORY;
ctxt->instate = XML_PARSER_EOF; /* TODO: Remove after refactoring */
ctxt->wellFormed = 0;
ctxt->disableSAX = 2;
if (ctxt->errorHandler) {
schannel = ctxt->errorHandler;
data = ctxt->errorCtxt;
} else if ((ctxt->sax->initialized == XML_SAX2_MAGIC) &&
(ctxt->sax->serror != NULL)) {
schannel = ctxt->sax->serror;
data = ctxt->userData;
} else {
channel = ctxt->sax->error;
data = ctxt->userData;
}
xmlRaiseMemoryError(schannel, channel, data, XML_FROM_PARSER,
&ctxt->lastError);
}
/**
* xmlCtxtErrIO:
* @ctxt: parser context
* @code: xmlParserErrors code
* @uri: filename or URI (optional)
*
* If filename is empty, use the one from context input if available.
*
* Report an IO error to the parser context.
*/
void
xmlCtxtErrIO(xmlParserCtxtPtr ctxt, int code, const char *uri)
{
const char *errstr, *msg, *str1, *str2;
xmlErrorLevel level;
if (ctxt == NULL)
return;
/*
* Only report a warning if a file could not be found. This should
* only be done for external entities, but the external entity loader
* of xsltproc can try multiple paths and assumes that ENOENT doesn't
* raise an error and aborts parsing.
*/
if (((code == XML_IO_ENOENT) ||
(code == XML_IO_NETWORK_ATTEMPT) ||
(code == XML_IO_UNKNOWN))) {
if (ctxt->validate == 0)
level = XML_ERR_WARNING;
else
level = XML_ERR_ERROR;
} else {
level = XML_ERR_FATAL;
}
errstr = xmlErrString(code);
if (uri == NULL) {
msg = "%s\n";
str1 = errstr;
str2 = NULL;
} else {
msg = "failed to load \"%s\": %s\n";
str1 = uri;
str2 = errstr;
}
xmlCtxtErr(ctxt, NULL, XML_FROM_IO, code, level,
(const xmlChar *) uri, NULL, NULL, 0,
msg, str1, str2);
}
/**
* xmlCtxtVErr:
* @ctxt: a parser context
* @node: the current node or NULL
* @domain: the domain for the error
* @code: the code for the error
* @level: the xmlErrorLevel for the error
* @str1: extra string info
* @str2: extra string info
* @str3: extra string info
* @int1: extra int info
* @msg: the message to display/transmit
* @ap: extra parameters for the message display
*
* Raise a parser error.
*/
void
xmlCtxtVErr(xmlParserCtxtPtr ctxt, xmlNodePtr node, xmlErrorDomain domain,
xmlParserErrors code, xmlErrorLevel level,
const xmlChar *str1, const xmlChar *str2, const xmlChar *str3,
int int1, const char *msg, va_list ap)
{
xmlStructuredErrorFunc schannel = NULL;
xmlGenericErrorFunc channel = NULL;
void *data = NULL;
const char *file = NULL;
int line = 0;
int col = 0;
int res;
if (code == XML_ERR_NO_MEMORY) {
xmlCtxtErrMemory(ctxt);
return;
}
if (PARSER_STOPPED(ctxt))
return;
if (level == XML_ERR_WARNING) {
if (ctxt->nbWarnings >= XML_MAX_ERRORS)
return;
ctxt->nbWarnings += 1;
} else {
if (ctxt->nbErrors >= XML_MAX_ERRORS)
return;
ctxt->nbErrors += 1;
}
if (((ctxt->options & XML_PARSE_NOERROR) == 0) &&
((level != XML_ERR_WARNING) ||
((ctxt->options & XML_PARSE_NOWARNING) == 0))) {
if (ctxt->errorHandler) {
schannel = ctxt->errorHandler;
data = ctxt->errorCtxt;
} else if ((ctxt->sax->initialized == XML_SAX2_MAGIC) &&
(ctxt->sax->serror != NULL)) {
schannel = ctxt->sax->serror;
data = ctxt->userData;
} else if ((domain == XML_FROM_VALID) || (domain == XML_FROM_DTD)) {
if (level == XML_ERR_WARNING)
channel = ctxt->vctxt.warning;
else
channel = ctxt->vctxt.error;
data = ctxt->vctxt.userData;
} else {
if (level == XML_ERR_WARNING)
channel = ctxt->sax->warning;
else
channel = ctxt->sax->error;
data = ctxt->userData;
}
}
if (ctxt->input != NULL) {
xmlParserInputPtr input = ctxt->input;
if ((input->filename == NULL) &&
(ctxt->inputNr > 1)) {
input = ctxt->inputTab[ctxt->inputNr - 2];
}
file = input->filename;
line = input->line;
col = input->col;
}
res = xmlVRaiseError(schannel, channel, data, ctxt, node, domain, code,
level, file, line, (const char *) str1,
(const char *) str2, (const char *) str3, int1, col,
msg, ap);
if (res < 0) {
xmlCtxtErrMemory(ctxt);
return;
}
if (level >= XML_ERR_ERROR)
ctxt->errNo = code;
if (level == XML_ERR_FATAL) {
ctxt->wellFormed = 0;
if (ctxt->recovery == 0)
ctxt->disableSAX = 1;
}
return;
}
/**
* xmlCtxtErr:
* @ctxt: a parser context
* @node: the current node or NULL
* @domain: the domain for the error
* @code: the code for the error
* @level: the xmlErrorLevel for the error
* @str1: extra string info
* @str2: extra string info
* @str3: extra string info
* @int1: extra int info
* @msg: the message to display/transmit
* @...: extra parameters for the message display
*
* Raise a parser error.
*/
void
xmlCtxtErr(xmlParserCtxtPtr ctxt, xmlNodePtr node, xmlErrorDomain domain,
xmlParserErrors code, xmlErrorLevel level,
const xmlChar *str1, const xmlChar *str2, const xmlChar *str3,
int int1, const char *msg, ...)
{
va_list ap;
va_start(ap, msg);
xmlCtxtVErr(ctxt, node, domain, code, level,
str1, str2, str3, int1, msg, ap);
va_end(ap);
}
/**
* xmlFatalErr:
* @ctxt: an XML parser context
* @code: the error number
* @info: extra information string
*
* Handle a fatal parser error, i.e. violating Well-Formedness constraints
*/
void
xmlFatalErr(xmlParserCtxtPtr ctxt, xmlParserErrors code, const char *info)
{
const char *errmsg;
xmlErrorLevel level;
if (code == XML_ERR_UNSUPPORTED_ENCODING)
level = XML_ERR_WARNING;
else
level = XML_ERR_FATAL;
errmsg = xmlErrString(code);
if (info == NULL) {
xmlCtxtErr(ctxt, NULL, XML_FROM_PARSER, code, level,
NULL, NULL, NULL, 0, "%s\n", errmsg);
} else {
xmlCtxtErr(ctxt, NULL, XML_FROM_PARSER, code, level,
(const xmlChar *) info, NULL, NULL, 0,
"%s: %s\n", errmsg, info);
}
}
/**
* xmlIsLetter:
* @c: an unicode character (int)
*
* Check whether the character is allowed by the production
* [84] Letter ::= BaseChar | Ideographic
*
* Returns 0 if not, non-zero otherwise
*/
int
xmlIsLetter(int c) {
return(IS_BASECHAR(c) || IS_IDEOGRAPHIC(c));
}
/************************************************************************
* *
* Input handling functions for progressive parsing *
* *
************************************************************************/
/* we need to keep enough input to show errors in context */
#define LINE_LEN 80
/**
* xmlHaltParser:
* @ctxt: an XML parser context
*
* Blocks further parser processing don't override error
* for internal use
*/
void
xmlHaltParser(xmlParserCtxtPtr ctxt) {
if (ctxt == NULL)
return;
ctxt->instate = XML_PARSER_EOF; /* TODO: Remove after refactoring */
ctxt->disableSAX = 2;
}
/**
* xmlParserInputRead:
* @in: an XML parser input
* @len: an indicative size for the lookahead
*
* DEPRECATED: This function was internal and is deprecated.
*
* Returns -1 as this is an error to use it.
*/
int
xmlParserInputRead(xmlParserInputPtr in ATTRIBUTE_UNUSED, int len ATTRIBUTE_UNUSED) {
return(-1);
}
/**
* xmlParserGrow:
* @ctxt: an XML parser context
*
* Grow the input buffer.
*
* Returns the number of bytes read or -1 in case of error.
*/
int
xmlParserGrow(xmlParserCtxtPtr ctxt) {
xmlParserInputPtr in = ctxt->input;
xmlParserInputBufferPtr buf = in->buf;
size_t curEnd = in->end - in->cur;
size_t curBase = in->cur - in->base;
size_t maxLength = (ctxt->options & XML_PARSE_HUGE) ?
XML_MAX_HUGE_LENGTH :
XML_MAX_LOOKUP_LIMIT;
int ret;
if (buf == NULL)
return(0);
/* Don't grow push parser buffer. */
if (PARSER_PROGRESSIVE(ctxt))
return(0);
/* Don't grow memory buffers. */
if ((buf->encoder == NULL) && (buf->readcallback == NULL))
return(0);
if (buf->error != 0)
return(-1);
if (curBase > maxLength) {
xmlFatalErr(ctxt, XML_ERR_RESOURCE_LIMIT,
"Buffer size limit exceeded, try XML_PARSE_HUGE\n");
xmlHaltParser(ctxt);
return(-1);
}
if (curEnd >= INPUT_CHUNK)
return(0);
ret = xmlParserInputBufferGrow(buf, INPUT_CHUNK);
xmlBufUpdateInput(buf->buffer, in, curBase);
if (ret < 0) {
xmlCtxtErrIO(ctxt, buf->error, NULL);
}
return(ret);
}
/**
* xmlParserInputGrow:
* @in: an XML parser input
* @len: an indicative size for the lookahead
*
* DEPRECATED: Don't use.
*
* This function increase the input for the parser. It tries to
* preserve pointers to the input buffer, and keep already read data
*
* Returns the amount of char read, or -1 in case of error, 0 indicate the
* end of this entity
*/
int
xmlParserInputGrow(xmlParserInputPtr in, int len) {
int ret;
size_t indx;
if ((in == NULL) || (len < 0)) return(-1);
if (in->buf == NULL) return(-1);
if (in->base == NULL) return(-1);
if (in->cur == NULL) return(-1);
if (in->buf->buffer == NULL) return(-1);
/* Don't grow memory buffers. */
if ((in->buf->encoder == NULL) && (in->buf->readcallback == NULL))
return(0);
indx = in->cur - in->base;
if (xmlBufUse(in->buf->buffer) > (unsigned int) indx + INPUT_CHUNK) {
return(0);
}
ret = xmlParserInputBufferGrow(in->buf, len);
in->base = xmlBufContent(in->buf->buffer);
if (in->base == NULL) {
in->base = BAD_CAST "";
in->cur = in->base;
in->end = in->base;
return(-1);
}
in->cur = in->base + indx;
in->end = xmlBufEnd(in->buf->buffer);
return(ret);
}
/**
* xmlParserShrink:
* @ctxt: an XML parser context
*
* Shrink the input buffer.
*/
void
xmlParserShrink(xmlParserCtxtPtr ctxt) {
xmlParserInputPtr in = ctxt->input;
xmlParserInputBufferPtr buf = in->buf;
size_t used;
if (buf == NULL)
return;
/* Don't shrink pull parser memory buffers. */
if ((!PARSER_PROGRESSIVE(ctxt)) &&
(buf->encoder == NULL) &&
(buf->readcallback == NULL))
return;
used = in->cur - in->base;
/*
* Do not shrink on large buffers whose only a tiny fraction
* was consumed
*/
if (used > INPUT_CHUNK) {
size_t res = xmlBufShrink(buf->buffer, used - LINE_LEN);
if (res > 0) {
used -= res;
if ((res > ULONG_MAX) ||
(in->consumed > ULONG_MAX - (unsigned long)res))
in->consumed = ULONG_MAX;
else
in->consumed += res;
}
}
xmlBufUpdateInput(buf->buffer, in, used);
}
/**
* xmlParserInputShrink:
* @in: an XML parser input
*
* DEPRECATED: Don't use.
*
* This function removes used input for the parser.
*/
void
xmlParserInputShrink(xmlParserInputPtr in) {
size_t used;
size_t ret;
if (in == NULL) return;
if (in->buf == NULL) return;
if (in->base == NULL) return;
if (in->cur == NULL) return;
if (in->buf->buffer == NULL) return;
used = in->cur - in->base;
/*
* Do not shrink on large buffers whose only a tiny fraction
* was consumed
*/
if (used > INPUT_CHUNK) {
ret = xmlBufShrink(in->buf->buffer, used - LINE_LEN);
if (ret > 0) {
used -= ret;
if ((ret > ULONG_MAX) ||
(in->consumed > ULONG_MAX - (unsigned long)ret))
in->consumed = ULONG_MAX;
else
in->consumed += ret;
}
}
if (xmlBufUse(in->buf->buffer) <= INPUT_CHUNK) {
xmlParserInputBufferRead(in->buf, 2 * INPUT_CHUNK);
}
in->base = xmlBufContent(in->buf->buffer);
if (in->base == NULL) {
/* TODO: raise error */
in->base = BAD_CAST "";
in->cur = in->base;
in->end = in->base;
return;
}
in->cur = in->base + used;
in->end = xmlBufEnd(in->buf->buffer);
}
/************************************************************************
* *
* UTF8 character input and related functions *
* *
************************************************************************/
/**
* xmlNextChar:
* @ctxt: the XML parser context
*
* DEPRECATED: Internal function, do not use.
*
* Skip to the next char input char.
*/
void
xmlNextChar(xmlParserCtxtPtr ctxt)
{
const unsigned char *cur;
size_t avail;
int c;
if ((ctxt == NULL) || (ctxt->input == NULL))
return;
avail = ctxt->input->end - ctxt->input->cur;
if (avail < INPUT_CHUNK) {
xmlParserGrow(ctxt);
if (ctxt->input->cur >= ctxt->input->end)
return;
avail = ctxt->input->end - ctxt->input->cur;
}
cur = ctxt->input->cur;
c = *cur;
if (c < 0x80) {
if (c == '\n') {
ctxt->input->cur++;
ctxt->input->line++;
ctxt->input->col = 1;
} else if (c == '\r') {
/*
* 2.11 End-of-Line Handling
* the literal two-character sequence "#xD#xA" or a standalone
* literal #xD, an XML processor must pass to the application
* the single character #xA.
*/
ctxt->input->cur += ((cur[1] == '\n') ? 2 : 1);
ctxt->input->line++;
ctxt->input->col = 1;
return;
} else {
ctxt->input->cur++;
ctxt->input->col++;
}
} else {
ctxt->input->col++;
if ((avail < 2) || (cur[1] & 0xc0) != 0x80)
goto encoding_error;
if (c < 0xe0) {
/* 2-byte code */
if (c < 0xc2)
goto encoding_error;
ctxt->input->cur += 2;
} else {
unsigned int val = (c << 8) | cur[1];
if ((avail < 3) || (cur[2] & 0xc0) != 0x80)
goto encoding_error;
if (c < 0xf0) {
/* 3-byte code */
if ((val < 0xe0a0) || ((val >= 0xeda0) && (val < 0xee00)))
goto encoding_error;
ctxt->input->cur += 3;
} else {
if ((avail < 4) || ((cur[3] & 0xc0) != 0x80))
goto encoding_error;
/* 4-byte code */
if ((val < 0xf090) || (val >= 0xf490))
goto encoding_error;
ctxt->input->cur += 4;
}
}
}
return;
encoding_error:
/* Only report the first error */
if ((ctxt->input->flags & XML_INPUT_ENCODING_ERROR) == 0) {
xmlCtxtErrIO(ctxt, XML_ERR_INVALID_ENCODING, NULL);
ctxt->input->flags |= XML_INPUT_ENCODING_ERROR;
}
ctxt->input->cur++;
return;
}
/**
* xmlCurrentChar:
* @ctxt: the XML parser context
* @len: pointer to the length of the char read
*
* DEPRECATED: Internal function, do not use.
*
* The current char value, if using UTF-8 this may actually span multiple
* bytes in the input buffer. Implement the end of line normalization:
* 2.11 End-of-Line Handling
* Wherever an external parsed entity or the literal entity value
* of an internal parsed entity contains either the literal two-character
* sequence "#xD#xA" or a standalone literal #xD, an XML processor
* must pass to the application the single character #xA.
* This behavior can conveniently be produced by normalizing all
* line breaks to #xA on input, before parsing.)
*
* Returns the current char value and its length
*/
int
xmlCurrentChar(xmlParserCtxtPtr ctxt, int *len) {
const unsigned char *cur;
size_t avail;
int c;
if ((ctxt == NULL) || (len == NULL) || (ctxt->input == NULL)) return(0);
avail = ctxt->input->end - ctxt->input->cur;
if (avail < INPUT_CHUNK) {
xmlParserGrow(ctxt);
avail = ctxt->input->end - ctxt->input->cur;
}
cur = ctxt->input->cur;
c = *cur;
if (c < 0x80) {
/* 1-byte code */
if (c < 0x20) {
/*
* 2.11 End-of-Line Handling
* the literal two-character sequence "#xD#xA" or a standalone
* literal #xD, an XML processor must pass to the application
* the single character #xA.
*/
if (c == '\r') {
/*
* TODO: This function shouldn't change the 'cur' pointer
* as side effect, but the NEXTL macro in parser.c relies
* on this behavior when incrementing line numbers.
*/
if (cur[1] == '\n')
ctxt->input->cur++;
*len = 1;
c = '\n';
} else if (c == 0) {
if (ctxt->input->cur >= ctxt->input->end) {
*len = 0;
} else {
*len = 1;
/*
* TODO: Null bytes should be handled by callers,
* but this can be tricky.
*/
xmlFatalErr(ctxt, XML_ERR_INVALID_CHAR,
"Char 0x0 out of allowed range\n");
}
} else {
*len = 1;
}
} else {
*len = 1;
}
return(c);
} else {
int val;
if (avail < 2)
goto incomplete_sequence;
if ((cur[1] & 0xc0) != 0x80)
goto encoding_error;
if (c < 0xe0) {
/* 2-byte code */
if (c < 0xc2)
goto encoding_error;
val = (c & 0x1f) << 6;
val |= cur[1] & 0x3f;
*len = 2;
} else {
if (avail < 3)
goto incomplete_sequence;
if ((cur[2] & 0xc0) != 0x80)
goto encoding_error;
if (c < 0xf0) {
/* 3-byte code */
val = (c & 0xf) << 12;
val |= (cur[1] & 0x3f) << 6;
val |= cur[2] & 0x3f;
if ((val < 0x800) || ((val >= 0xd800) && (val < 0xe000)))
goto encoding_error;
*len = 3;
} else {
if (avail < 4)
goto incomplete_sequence;
if ((cur[3] & 0xc0) != 0x80)
goto encoding_error;
/* 4-byte code */
val = (c & 0x0f) << 18;
val |= (cur[1] & 0x3f) << 12;
val |= (cur[2] & 0x3f) << 6;
val |= cur[3] & 0x3f;
if ((val < 0x10000) || (val >= 0x110000))
goto encoding_error;
*len = 4;
}
}
return(val);
}
encoding_error:
/* Only report the first error */
if ((ctxt->input->flags & XML_INPUT_ENCODING_ERROR) == 0) {
xmlCtxtErrIO(ctxt, XML_ERR_INVALID_ENCODING, NULL);
ctxt->input->flags |= XML_INPUT_ENCODING_ERROR;
}
*len = 1;
return(0xFFFD); /* U+FFFD Replacement Character */
incomplete_sequence:
/*
* An encoding problem may arise from a truncated input buffer
* splitting a character in the middle. In that case do not raise
* an error but return 0. This should only happen when push parsing
* char data.
*/
*len = 0;
return(0);
}
/**
* xmlStringCurrentChar:
* @ctxt: the XML parser context
* @cur: pointer to the beginning of the char
* @len: pointer to the length of the char read
*
* DEPRECATED: Internal function, do not use.
*
* The current char value, if using UTF-8 this may actually span multiple
* bytes in the input buffer.
*
* Returns the current char value and its length
*/
int
xmlStringCurrentChar(xmlParserCtxtPtr ctxt ATTRIBUTE_UNUSED,
const xmlChar *cur, int *len) {
int c;
if ((cur == NULL) || (len == NULL))
return(0);
/* cur is zero-terminated, so we can lie about its length. */
*len = 4;
c = xmlGetUTF8Char(cur, len);
return((c < 0) ? 0 : c);
}
/**
* xmlCopyCharMultiByte:
* @out: pointer to an array of xmlChar
* @val: the char value
*
* append the char value in the array
*
* Returns the number of xmlChar written
*/
int
xmlCopyCharMultiByte(xmlChar *out, int val) {
if ((out == NULL) || (val < 0)) return(0);
/*
* We are supposed to handle UTF8, check it's valid
* From rfc2044: encoding of the Unicode values on UTF-8:
*
* UCS-4 range (hex.) UTF-8 octet sequence (binary)
* 0000 0000-0000 007F 0xxxxxxx
* 0000 0080-0000 07FF 110xxxxx 10xxxxxx
* 0000 0800-0000 FFFF 1110xxxx 10xxxxxx 10xxxxxx
*/
if (val >= 0x80) {
xmlChar *savedout = out;
int bits;
if (val < 0x800) { *out++= (val >> 6) | 0xC0; bits= 0; }
else if (val < 0x10000) { *out++= (val >> 12) | 0xE0; bits= 6;}
else if (val < 0x110000) { *out++= (val >> 18) | 0xF0; bits= 12; }
else {
#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
fprintf(stderr, "xmlCopyCharMultiByte: codepoint out of range\n");
abort();
#endif
return(0);
}
for ( ; bits >= 0; bits-= 6)
*out++= ((val >> bits) & 0x3F) | 0x80 ;
return (out - savedout);
}
*out = val;
return 1;
}
/**
* xmlCopyChar:
* @len: Ignored, compatibility
* @out: pointer to an array of xmlChar
* @val: the char value
*
* append the char value in the array
*
* Returns the number of xmlChar written
*/
int
xmlCopyChar(int len ATTRIBUTE_UNUSED, xmlChar *out, int val) {
if ((out == NULL) || (val < 0)) return(0);
/* the len parameter is ignored */
if (val >= 0x80) {
return(xmlCopyCharMultiByte (out, val));
}
*out = val;
return 1;
}
/************************************************************************
* *
* Commodity functions to switch encodings *
* *
************************************************************************/
static int
xmlDetectEBCDIC(xmlParserInputPtr input, xmlCharEncodingHandlerPtr *hout) {
xmlChar out[200];
xmlCharEncodingHandlerPtr handler;
int inlen, outlen, res, i;
*hout = NULL;
/*
* To detect the EBCDIC code page, we convert the first 200 bytes
* to EBCDIC-US and try to find the encoding declaration.
*/
res = xmlLookupCharEncodingHandler(XML_CHAR_ENCODING_EBCDIC, &handler);
if (res != 0)
return(res);
outlen = sizeof(out) - 1;
inlen = input->end - input->cur;
res = xmlEncInputChunk(handler, out, &outlen, input->cur, &inlen);
/*
* Return the EBCDIC handler if decoding failed. The error will
* be reported later.
*/
if (res < 0)
goto done;
out[outlen] = 0;
for (i = 0; i < outlen; i++) {
if (out[i] == '>')
break;
if ((out[i] == 'e') &&
(xmlStrncmp(out + i, BAD_CAST "encoding", 8) == 0)) {
int start, cur, quote;
i += 8;
while (IS_BLANK_CH(out[i]))
i += 1;
if (out[i++] != '=')
break;
while (IS_BLANK_CH(out[i]))
i += 1;
quote = out[i++];
if ((quote != '\'') && (quote != '"'))
break;
start = i;
cur = out[i];
while (((cur >= 'a') && (cur <= 'z')) ||
((cur >= 'A') && (cur <= 'Z')) ||
((cur >= '0') && (cur <= '9')) ||
(cur == '.') || (cur == '_') ||
(cur == '-'))
cur = out[++i];
if (cur != quote)
break;
out[i] = 0;
xmlCharEncCloseFunc(handler);
res = xmlOpenCharEncodingHandler((char *) out + start,
/* output */ 0, &handler);
if (res != 0)
return(res);
*hout = handler;
return(0);
}
}
done:
/*
* Encoding handlers are stateful, so we have to recreate them.
*/
xmlCharEncCloseFunc(handler);
res = xmlLookupCharEncodingHandler(XML_CHAR_ENCODING_EBCDIC, &handler);
if (res != 0)
return(res);
*hout = handler;
return(0);
}
/**
* xmlSwitchEncoding:
* @ctxt: the parser context
* @enc: the encoding value (number)
*
* Use encoding specified by enum to decode input data. This overrides
* the encoding found in the XML declaration.
*
* This function can also be used to override the encoding of chunks
* passed to xmlParseChunk.
*
* Returns 0 in case of success, -1 otherwise
*/
int
xmlSwitchEncoding(xmlParserCtxtPtr ctxt, xmlCharEncoding enc)
{
xmlCharEncodingHandlerPtr handler = NULL;
int ret;
int res;
if ((ctxt == NULL) || (ctxt->input == NULL))
return(-1);
switch (enc) {
case XML_CHAR_ENCODING_NONE:
case XML_CHAR_ENCODING_UTF8:
case XML_CHAR_ENCODING_ASCII:
res = 0;
break;
case XML_CHAR_ENCODING_EBCDIC:
res = xmlDetectEBCDIC(ctxt->input, &handler);
break;
default:
res = xmlLookupCharEncodingHandler(enc, &handler);
break;
}
if (res != 0) {
const char *name = xmlGetCharEncodingName(enc);
xmlFatalErr(ctxt, res, (name ? name : "<null>"));
return(-1);
}
ret = xmlSwitchInputEncoding(ctxt, ctxt->input, handler);
if ((ret >= 0) && (enc == XML_CHAR_ENCODING_NONE)) {
ctxt->input->flags &= ~XML_INPUT_HAS_ENCODING;
}
return(ret);
}
/**
* xmlSwitchInputEncodingName:
* @ctxt: the parser context, only for error reporting
* @input: the input strea,
* @encoding: the encoding name
*
* Returns 0 in case of success, -1 otherwise
*/
static int
xmlSwitchInputEncodingName(xmlParserCtxtPtr ctxt, xmlParserInputPtr input,
const char *encoding) {
xmlCharEncodingHandlerPtr handler;
int res;
if (encoding == NULL)
return(-1);
res = xmlOpenCharEncodingHandler(encoding, /* output */ 0, &handler);
if (res != 0) {
xmlFatalErr(ctxt, res, encoding);
return(-1);
}
return(xmlSwitchInputEncoding(ctxt, input, handler));
}
/**
* xmlSwitchEncodingName:
* @ctxt: the parser context
* @encoding: the encoding name
*
* Use specified encoding to decode input data. This overrides the
* encoding found in the XML declaration.
*
* This function can also be used to override the encoding of chunks
* passed to xmlParseChunk.
*
* Available since 2.13.0.
*
* Returns 0 in case of success, -1 otherwise
*/
int
xmlSwitchEncodingName(xmlParserCtxtPtr ctxt, const char *encoding) {
if (ctxt == NULL)
return(-1);
return(xmlSwitchInputEncodingName(ctxt, ctxt->input, encoding));
}
/**
* xmlInputSetEncodingHandler:
* @input: the input stream
* @handler: the encoding handler
*
* Use encoding handler to decode input data.
*
* Closes the handler on error.
*
* Returns an xmlParserErrors code.
*/
static int
xmlInputSetEncodingHandler(xmlParserInputPtr input,
xmlCharEncodingHandlerPtr handler) {
int nbchars;
xmlParserInputBufferPtr in;
if ((input == NULL) || (input->buf == NULL)) {
xmlCharEncCloseFunc(handler);
return(XML_ERR_ARGUMENT);
}
in = input->buf;
input->flags |= XML_INPUT_HAS_ENCODING;
/*
* UTF-8 requires no encoding handler.
*/
if ((handler != NULL) &&
(xmlStrcasecmp(BAD_CAST handler->name, BAD_CAST "UTF-8") == 0)) {
xmlCharEncCloseFunc(handler);
handler = NULL;
}
if (in->encoder == handler)
return(XML_ERR_OK);
if (in->encoder != NULL) {
/*
* Switching encodings during parsing is a really bad idea,
* but Chromium can switch between ISO-8859-1 and UTF-16 before
* separate calls to xmlParseChunk.
*
* TODO: We should check whether the "raw" input buffer is empty and
* convert the old content using the old encoder.
*/
xmlCharEncCloseFunc(in->encoder);
in->encoder = handler;
return(XML_ERR_OK);
}
in->encoder = handler;
/*
* Is there already some content down the pipe to convert ?
*/
if (xmlBufIsEmpty(in->buffer) == 0) {
xmlBufPtr buf;
size_t processed;
buf = xmlBufCreate();
if (buf == NULL)
return(XML_ERR_NO_MEMORY);
/*
* Shrink the current input buffer.
* Move it as the raw buffer and create a new input buffer
*/
processed = input->cur - input->base;
xmlBufShrink(in->buffer, processed);
input->consumed += processed;
in->raw = in->buffer;
in->buffer = buf;
in->rawconsumed = processed;
nbchars = xmlCharEncInput(in);
xmlBufResetInput(in->buffer, input);
if (nbchars < 0)
return(in->error);
}
return(XML_ERR_OK);
}
/**
* xmlInputSetEncoding:
* @input: the input stream
* @encoding: the encoding name
*
* Use specified encoding to decode input data. This overrides the
* encoding found in the XML declaration.
*
* Available since 2.14.0.
*
* Returns an xmlParserErrors code.
*/
int
xmlInputSetEncoding(xmlParserInputPtr input, const char *encoding) {
xmlCharEncodingHandlerPtr handler;
int res;
if (encoding == NULL)
return(XML_ERR_ARGUMENT);
res = xmlOpenCharEncodingHandler(encoding, /* output */ 0, &handler);
if (res != 0)
return(res);
return(xmlInputSetEncodingHandler(input, handler));
}
/**
* xmlSwitchInputEncoding:
* @ctxt: the parser context, only for error reporting
* @input: the input stream
* @handler: the encoding handler
*
* DEPRECATED: Internal function, don't use.
*
* Use encoding handler to decode input data.
*
* Returns 0 in case of success, -1 otherwise
*/
int
xmlSwitchInputEncoding(xmlParserCtxtPtr ctxt, xmlParserInputPtr input,
xmlCharEncodingHandlerPtr handler) {
int code = xmlInputSetEncodingHandler(input, handler);
if (code != XML_ERR_OK) {
xmlCtxtErrIO(ctxt, code, NULL);
return(-1);
}
return(0);
}
/**
* xmlSwitchToEncoding:
* @ctxt: the parser context
* @handler: the encoding handler
*
* Use encoding handler to decode input data.
*
* This function can be used to enforce the encoding of chunks passed
* to xmlParseChunk.
*
* Returns 0 in case of success, -1 otherwise
*/
int
xmlSwitchToEncoding(xmlParserCtxtPtr ctxt, xmlCharEncodingHandlerPtr handler)
{
if (ctxt == NULL)
return(-1);
return(xmlSwitchInputEncoding(ctxt, ctxt->input, handler));
}
/**
* xmlDetectEncoding:
* @ctxt: the parser context
*
* Handle optional BOM, detect and switch to encoding.
*
* Assumes that there are at least four bytes in the input buffer.
*/
void
xmlDetectEncoding(xmlParserCtxtPtr ctxt) {
const xmlChar *in;
xmlCharEncoding enc;
int bomSize;
int autoFlag = 0;
if (xmlParserGrow(ctxt) < 0)
return;
in = ctxt->input->cur;
if (ctxt->input->end - in < 4)
return;
if (ctxt->input->flags & XML_INPUT_HAS_ENCODING) {
/*
* If the encoding was already set, only skip the BOM which was
* possibly decoded to UTF-8.
*/
if ((in[0] == 0xEF) && (in[1] == 0xBB) && (in[2] == 0xBF)) {
ctxt->input->cur += 3;
}
return;
}
enc = XML_CHAR_ENCODING_NONE;
bomSize = 0;
switch (in[0]) {
case 0x00:
if ((in[1] == 0x00) && (in[2] == 0x00) && (in[3] == 0x3C)) {
enc = XML_CHAR_ENCODING_UCS4BE;
autoFlag = XML_INPUT_AUTO_OTHER;
} else if ((in[1] == 0x3C) && (in[2] == 0x00) && (in[3] == 0x3F)) {
enc = XML_CHAR_ENCODING_UTF16BE;
autoFlag = XML_INPUT_AUTO_UTF16BE;
}
break;
case 0x3C:
if (in[1] == 0x00) {
if ((in[2] == 0x00) && (in[3] == 0x00)) {
enc = XML_CHAR_ENCODING_UCS4LE;
autoFlag = XML_INPUT_AUTO_OTHER;
} else if ((in[2] == 0x3F) && (in[3] == 0x00)) {
enc = XML_CHAR_ENCODING_UTF16LE;
autoFlag = XML_INPUT_AUTO_UTF16LE;
}
}
break;
case 0x4C:
if ((in[1] == 0x6F) && (in[2] == 0xA7) && (in[3] == 0x94)) {
enc = XML_CHAR_ENCODING_EBCDIC;
autoFlag = XML_INPUT_AUTO_OTHER;
}
break;
case 0xEF:
if ((in[1] == 0xBB) && (in[2] == 0xBF)) {
enc = XML_CHAR_ENCODING_UTF8;
autoFlag = XML_INPUT_AUTO_UTF8;
bomSize = 3;
}
break;
case 0xFE:
if (in[1] == 0xFF) {
enc = XML_CHAR_ENCODING_UTF16BE;
autoFlag = XML_INPUT_AUTO_UTF16BE;
bomSize = 2;
}
break;
case 0xFF:
if (in[1] == 0xFE) {
enc = XML_CHAR_ENCODING_UTF16LE;
autoFlag = XML_INPUT_AUTO_UTF16LE;
bomSize = 2;
}
break;
}
if (bomSize > 0) {
ctxt->input->cur += bomSize;
}
if (enc != XML_CHAR_ENCODING_NONE) {
ctxt->input->flags |= autoFlag;
xmlSwitchEncoding(ctxt, enc);
}
}
/**
* xmlSetDeclaredEncoding:
* @ctxt: the parser context
* @encoding: declared encoding
*
* Set the encoding from a declaration in the document.
*
* If no encoding was set yet, switch the encoding. Otherwise, only warn
* about encoding mismatches.
*
* Takes ownership of 'encoding'.
*/
void
xmlSetDeclaredEncoding(xmlParserCtxtPtr ctxt, xmlChar *encoding) {
if (((ctxt->input->flags & XML_INPUT_HAS_ENCODING) == 0) &&
((ctxt->options & XML_PARSE_IGNORE_ENC) == 0)) {
xmlSwitchEncodingName(ctxt, (const char *) encoding);
ctxt->input->flags |= XML_INPUT_USES_ENC_DECL;
} else if (ctxt->input->flags & XML_INPUT_AUTO_ENCODING) {
static const char *allowedUTF8[] = {
"UTF-8", "UTF8", NULL
};
static const char *allowedUTF16LE[] = {
"UTF-16", "UTF-16LE", "UTF16", NULL
};
static const char *allowedUTF16BE[] = {
"UTF-16", "UTF-16BE", "UTF16", NULL
};
const char **allowed = NULL;
const char *autoEnc = NULL;
switch (ctxt->input->flags & XML_INPUT_AUTO_ENCODING) {
case XML_INPUT_AUTO_UTF8:
allowed = allowedUTF8;
autoEnc = "UTF-8";
break;
case XML_INPUT_AUTO_UTF16LE:
allowed = allowedUTF16LE;
autoEnc = "UTF-16LE";
break;
case XML_INPUT_AUTO_UTF16BE:
allowed = allowedUTF16BE;
autoEnc = "UTF-16BE";
break;
}
if (allowed != NULL) {
const char **p;
int match = 0;
for (p = allowed; *p != NULL; p++) {
if (xmlStrcasecmp(encoding, BAD_CAST *p) == 0) {
match = 1;
break;
}
}
if (match == 0) {
xmlWarningMsg(ctxt, XML_WAR_ENCODING_MISMATCH,
"Encoding '%s' doesn't match "
"auto-detected '%s'\n",
encoding, BAD_CAST autoEnc);
xmlFree(encoding);
encoding = xmlStrdup(BAD_CAST autoEnc);
if (encoding == NULL)
xmlCtxtErrMemory(ctxt);
}
}
}
if (ctxt->encoding != NULL)
xmlFree((xmlChar *) ctxt->encoding);
ctxt->encoding = encoding;
}
/**
* xmlGetActualEncoding:
* @ctxt: the parser context
*
* Returns the actual used to parse the document. This can differ from
* the declared encoding.
*/
const xmlChar *
xmlGetActualEncoding(xmlParserCtxtPtr ctxt) {
const xmlChar *encoding = NULL;
if ((ctxt->input->flags & XML_INPUT_USES_ENC_DECL) ||
(ctxt->input->flags & XML_INPUT_AUTO_ENCODING)) {
/* Preserve encoding exactly */
encoding = ctxt->encoding;
} else if ((ctxt->input->buf) && (ctxt->input->buf->encoder)) {
encoding = BAD_CAST ctxt->input->buf->encoder->name;
} else if (ctxt->input->flags & XML_INPUT_HAS_ENCODING) {
encoding = BAD_CAST "UTF-8";
}
return(encoding);
}
/************************************************************************
* *
* Commodity functions to handle entities processing *
* *
************************************************************************/
/**
* xmlFreeInputStream:
* @input: an xmlParserInputPtr
*
* Free up an input stream.
*/
void
xmlFreeInputStream(xmlParserInputPtr input) {
if (input == NULL) return;
if (input->filename != NULL) xmlFree((char *) input->filename);
if (input->version != NULL) xmlFree((char *) input->version);
if ((input->free != NULL) && (input->base != NULL))
input->free((xmlChar *) input->base);
if (input->buf != NULL)
xmlFreeParserInputBuffer(input->buf);
xmlFree(input);
}
/**
* xmlNewInputStream:
* @ctxt: an XML parser context
*
* Create a new input stream structure.
*
* Returns the new input stream or NULL
*/
xmlParserInputPtr
xmlNewInputStream(xmlParserCtxtPtr ctxt) {
xmlParserInputPtr input;
input = (xmlParserInputPtr) xmlMalloc(sizeof(xmlParserInput));
if (input == NULL) {
xmlCtxtErrMemory(ctxt);
return(NULL);
}
memset(input, 0, sizeof(xmlParserInput));
input->line = 1;
input->col = 1;
return(input);
}
/**
* xmlNewInputURL:
* @ctxt: parser context
* @url: filename or URL
* @publicId: publid ID from doctype (optional)
* @encoding: character encoding (optional)
* @flags: unused, pass 0
*
* Creates a new parser input from the filesystem, the network or
* a user-defined resource loader.
*
* Returns a new parser input.
*/
xmlParserInputPtr
xmlNewInputURL(xmlParserCtxtPtr ctxt, const char *url, const char *publicId,
const char *encoding, int flags ATTRIBUTE_UNUSED) {
xmlParserInputPtr input;
if ((ctxt == NULL) || (url == NULL))
return(NULL);
input = xmlLoadResource(ctxt, url, publicId, XML_RESOURCE_MAIN_DOCUMENT);
if (input == NULL)
return(NULL);
if (encoding != NULL)
xmlSwitchInputEncodingName(ctxt, input, encoding);
return(input);
}
/**
* xmlNewInputInternal:
* @buf: parser input buffer
* @filename: filename or URL
*
* Internal helper function.
*
* Returns a new parser input.
*/
static xmlParserInputPtr
xmlNewInputInternal(xmlParserInputBufferPtr buf, const char *filename) {
xmlParserInputPtr input;
input = (xmlParserInputPtr) xmlMalloc(sizeof(xmlParserInput));
if (input == NULL) {
xmlFreeParserInputBuffer(buf);
return(NULL);
}
memset(input, 0, sizeof(xmlParserInput));
input->line = 1;
input->col = 1;
input->buf = buf;
xmlBufResetInput(input->buf->buffer, input);
if (filename != NULL) {
input->filename = xmlMemStrdup(filename);
if (input->filename == NULL) {
xmlFreeInputStream(input);
return(NULL);
}
}
return(input);
}
/**
* xmlInputCreateMemory:
* @url: base URL (optional)
* @mem: pointer to char array
* @size: size of array
* @flags: optimization hints
*
* Creates a new parser input to read from a memory area.
*
* @url is used as base to resolve external entities and for
* error reporting.
*
* If the XML_INPUT_BUF_STATIC flag is set, the memory area must
* stay unchanged until parsing has finished. This can avoid
* temporary copies.
*
* If the XML_INPUT_BUF_ZERO_TERMINATED flag is set, the memory
* area must contain a zero byte after the buffer at position @size.
* This can avoid temporary copies.
*
* Available since 2.14.0.
*
* Returns a new parser input or NULL if a memory allocation failed.
*/
xmlParserInputPtr
xmlInputCreateMemory(const char *url, const void *mem, size_t size,
int flags) {
xmlParserInputBufferPtr buf;
if (mem == NULL)
return(NULL);
buf = xmlNewInputBufferMemory(mem, size, flags, XML_CHAR_ENCODING_NONE);
if (buf == NULL)
return(NULL);
return(xmlNewInputInternal(buf, url));
}
/**
* xmlNewInputMemory:
* @ctxt: parser context
* @url: base URL (optional)
* @mem: pointer to char array
* @size: size of array
* @encoding: character encoding (optional)
* @flags: optimization hints
*
* Returns a new parser input or NULL in case of error.
*/
xmlParserInputPtr
xmlNewInputMemory(xmlParserCtxtPtr ctxt, const char *url,
const void *mem, size_t size,
const char *encoding, int flags) {
xmlParserInputPtr input;
if ((ctxt == NULL) || (mem == NULL))
return(NULL);
input = xmlInputCreateMemory(url, mem, size, flags);
if (input == NULL) {
xmlCtxtErrMemory(ctxt);
return(NULL);
}
if (encoding != NULL)
xmlSwitchInputEncodingName(ctxt, input, encoding);
return(input);
}
/**
* xmlInputCreateString:
* @url: base URL (optional)
* @str: zero-terminated string
* @flags: optimization hints
*
* Creates a new parser input to read from a zero-terminated string.
*
* @url is used as base to resolve external entities and for
* error reporting.
*
* If the XML_INPUT_BUF_STATIC flag is set, the string must
* stay unchanged until parsing has finished. This can avoid
* temporary copies.
*
* Available since 2.14.0.
*
* Returns a new parser input or NULL if a memory allocation failed.
*/
xmlParserInputPtr
xmlInputCreateString(const char *url, const char *str, int flags) {
xmlParserInputBufferPtr buf;
if (str == NULL)
return(NULL);
buf = xmlNewInputBufferString(str, flags);
if (buf == NULL)
return(NULL);
return(xmlNewInputInternal(buf, url));
}
/**
* xmlNewInputString:
* @ctxt: parser context
* @url: base URL (optional)
* @str: zero-terminated string
* @encoding: character encoding (optional)
* @flags: optimization hints
*
* Returns a new parser input.
*/
xmlParserInputPtr
xmlNewInputString(xmlParserCtxtPtr ctxt, const char *url,
const char *str, const char *encoding, int flags) {
xmlParserInputPtr input;
if ((ctxt == NULL) || (str == NULL))
return(NULL);
input = xmlInputCreateString(url, str, flags);
if (input == NULL) {
xmlCtxtErrMemory(ctxt);
return(NULL);
}
if (encoding != NULL)
xmlSwitchInputEncodingName(ctxt, input, encoding);
return(input);
}
/**
* xmlInputCreateFd:
* @url: base URL (optional)
* @fd: file descriptor
* @flags: unused, pass 0
*
* Creates a new parser input to read from a zero-terminated string.
*
* @url is used as base to resolve external entities and for
* error reporting.
*
* @fd is closed after parsing has finished.
*
* Available since 2.14.0.
*
* Returns a new parser input or NULL if a memory allocation failed.
*/
xmlParserInputPtr
xmlInputCreateFd(const char *url, int fd, int flags ATTRIBUTE_UNUSED) {
xmlParserInputBufferPtr buf;
if (fd < 0)
return(NULL);
buf = xmlParserInputBufferCreateFd(fd, XML_CHAR_ENCODING_NONE);
if (buf == NULL)
return(NULL);
return(xmlNewInputInternal(buf, url));
}
/**
* xmlNewInputFd:
* @ctxt: parser context
* @url: base URL (optional)
* @fd: file descriptor
* @encoding: character encoding (optional)
* @flags: unused, pass 0
*
* Returns a new parser input.
*/
xmlParserInputPtr
xmlNewInputFd(xmlParserCtxtPtr ctxt, const char *url,
int fd, const char *encoding, int flags) {
xmlParserInputPtr input;
if ((ctxt == NULL) || (fd < 0))
return(NULL);
input = xmlInputCreateFd(url, fd, flags);
if (input == NULL) {
xmlCtxtErrMemory(ctxt);
return(NULL);
}
if (encoding != NULL)
xmlSwitchInputEncodingName(ctxt, input, encoding);
return(input);
}
/**
* xmlInputCreateIO:
* @url: base URL (optional)
* @ioRead: read callback
* @ioClose: close callback (optional)
* @ioCtxt: IO context
* @flags: unused, pass 0
*
* Creates a new parser input to read from input callbacks and
* cintext.
*
* @url is used as base to resolve external entities and for
* error reporting.
*
* @ioRead is called to read new data into a provided buffer.
* It must return the number of bytes written into the buffer
* ot a negative xmlParserErrors code on failure.
*
* @ioClose is called after parsing has finished.
*
* @ioCtxt is an opaque pointer passed to the callbacks.
*
* Available since 2.14.0.
*
* Returns a new parser input or NULL if a memory allocation failed.
*/
xmlParserInputPtr
xmlInputCreateIO(const char *url, xmlInputReadCallback ioRead,
xmlInputCloseCallback ioClose, void *ioCtxt,
int flags ATTRIBUTE_UNUSED) {
xmlParserInputBufferPtr buf;
if (ioRead == NULL)
return(NULL);
buf = xmlAllocParserInputBuffer(XML_CHAR_ENCODING_NONE);
if (buf == NULL) {
if (ioClose != NULL)
ioClose(ioCtxt);
return(NULL);
}
buf->context = ioCtxt;
buf->readcallback = ioRead;
buf->closecallback = ioClose;
return(xmlNewInputInternal(buf, url));
}
/**
* xmlNewInputIO:
* @ctxt: parser context
* @url: base URL (optional)
* @ioRead: read callback
* @ioClose: close callback (optional)
* @ioCtxt: IO context
* @encoding: character encoding (optional)
* @flags: unused, pass 0
*
* Returns a new parser input.
*/
xmlParserInputPtr
xmlNewInputIO(xmlParserCtxtPtr ctxt, const char *url,
xmlInputReadCallback ioRead, xmlInputCloseCallback ioClose,
void *ioCtxt, const char *encoding, int flags) {
xmlParserInputPtr input;
if ((ctxt == NULL) || (ioRead == NULL))
return(NULL);
input = xmlInputCreateIO(url, ioRead, ioClose, ioCtxt, flags);
if (input == NULL) {
xmlCtxtErrMemory(ctxt);
return(NULL);
}
if (encoding != NULL)
xmlSwitchInputEncodingName(ctxt, input, encoding);
return(input);
}
/**
* xmlInputCreatePush:
* @url: base URL (optional)
* @chunk: pointer to char array
* @size: size of array
*
* Creates a new parser input for a push parser.
*
* Returns a new parser input or NULL if a memory allocation failed.
*/
xmlParserInputPtr
xmlInputCreatePush(const char *url, const char *chunk, int size) {
xmlParserInputBufferPtr buf;
xmlParserInputPtr input;
buf = xmlAllocParserInputBuffer(XML_CHAR_ENCODING_NONE);
if (buf == NULL)
return(NULL);
input = xmlNewInputInternal(buf, url);
if (input == NULL)
return(NULL);
input->flags |= XML_INPUT_PROGRESSIVE;
if ((size > 0) && (chunk != NULL)) {
int res;
res = xmlParserInputBufferPush(input->buf, size, chunk);
xmlBufResetInput(input->buf->buffer, input);
if (res < 0) {
xmlFreeInputStream(input);
return(NULL);
}
}
return(input);
}
/**
* xmlNewIOInputStream:
* @ctxt: an XML parser context
* @buf: an input buffer
* @enc: the charset encoding if known
*
* Create a new input stream structure encapsulating the @input into
* a stream suitable for the parser.
*
* Returns the new input stream or NULL
*/
xmlParserInputPtr
xmlNewIOInputStream(xmlParserCtxtPtr ctxt, xmlParserInputBufferPtr buf,
xmlCharEncoding enc) {
xmlParserInputPtr input;
const char *encoding;
if (buf == NULL)
return(NULL);
input = xmlNewInputInternal(buf, NULL);
if (input == NULL) {
xmlCtxtErrMemory(ctxt);
return(NULL);
}
encoding = xmlGetCharEncodingName(enc);
if (encoding != NULL)
xmlSwitchInputEncodingName(ctxt, input, encoding);
return(input);
}
/**
* xmlNewEntityInputStream:
* @ctxt: an XML parser context
* @ent: an Entity pointer
*
* DEPRECATED: Internal function, do not use.
*
* Create a new input stream based on an xmlEntityPtr
*
* Returns the new input stream or NULL
*/
xmlParserInputPtr
xmlNewEntityInputStream(xmlParserCtxtPtr ctxt, xmlEntityPtr ent) {
xmlParserInputPtr input;
if ((ctxt == NULL) || (ent == NULL))
return(NULL);
if (ent->content != NULL) {
input = xmlNewInputString(ctxt, NULL, (const char *) ent->content,
NULL, XML_INPUT_BUF_STATIC);
} else if (ent->URI != NULL) {
xmlResourceType rtype;
if (ent->etype == XML_EXTERNAL_PARAMETER_ENTITY)
rtype = XML_RESOURCE_PARAMETER_ENTITY;
else
rtype = XML_RESOURCE_GENERAL_ENTITY;
input = xmlLoadResource(ctxt, (char *) ent->URI,
(char *) ent->ExternalID, rtype);
} else {
return(NULL);
}
if (input == NULL)
return(NULL);
input->entity = ent;
return(input);
}
/**
* xmlNewStringInputStream:
* @ctxt: an XML parser context
* @buffer: an memory buffer
*
* Create a new input stream based on a memory buffer.
*
* Returns the new input stream
*/
xmlParserInputPtr
xmlNewStringInputStream(xmlParserCtxtPtr ctxt, const xmlChar *buffer) {
return(xmlNewInputString(ctxt, NULL, (const char *) buffer, NULL, 0));
}
/****************************************************************
* *
* External entities loading *
* *
****************************************************************/
#ifdef LIBXML_CATALOG_ENABLED
/**
* xmlResolveResourceFromCatalog:
* @URL: the URL for the entity to load
* @ID: the System ID for the entity to load
* @ctxt: the context in which the entity is called or NULL
*
* Resolves the URL and ID against the appropriate catalog.
* This function is used by xmlDefaultExternalEntityLoader and
* xmlNoNetExternalEntityLoader.
*
* Returns a new allocated URL, or NULL.
*/
static xmlChar *
xmlResolveResourceFromCatalog(const char *URL, const char *ID,
xmlParserCtxtPtr ctxt) {
xmlChar *resource = NULL;
xmlCatalogAllow pref;
/*
* If the resource doesn't exists as a file,
* try to load it from the resource pointed in the catalogs
*/
pref = xmlCatalogGetDefaults();
if ((pref != XML_CATA_ALLOW_NONE) && (!xmlNoNetExists(URL))) {
/*
* Do a local lookup
*/
if ((ctxt != NULL) && (ctxt->catalogs != NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_DOCUMENT))) {
resource = xmlCatalogLocalResolve(ctxt->catalogs,
(const xmlChar *)ID,
(const xmlChar *)URL);
}
/*
* Try a global lookup
*/
if ((resource == NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_GLOBAL))) {
resource = xmlCatalogResolve((const xmlChar *)ID,
(const xmlChar *)URL);
}
if ((resource == NULL) && (URL != NULL))
resource = xmlStrdup((const xmlChar *) URL);
/*
* TODO: do an URI lookup on the reference
*/
if ((resource != NULL) && (!xmlNoNetExists((const char *)resource))) {
xmlChar *tmp = NULL;
if ((ctxt != NULL) && (ctxt->catalogs != NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_DOCUMENT))) {
tmp = xmlCatalogLocalResolveURI(ctxt->catalogs, resource);
}
if ((tmp == NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_GLOBAL))) {
tmp = xmlCatalogResolveURI(resource);
}
if (tmp != NULL) {
xmlFree(resource);
resource = tmp;
}
}
}
return resource;
}
#endif
/**
* xmlCheckHTTPInput:
* @ctxt: an XML parser context
* @ret: an XML parser input
*
* DEPRECATED: Internal function, don't use.
*
* Check an input in case it was created from an HTTP stream, in that
* case it will handle encoding and update of the base URL in case of
* redirection. It also checks for HTTP errors in which case the input
* is cleanly freed up and an appropriate error is raised in context
*
* Returns the input or NULL in case of HTTP error.
*/
xmlParserInputPtr
xmlCheckHTTPInput(xmlParserCtxtPtr ctxt, xmlParserInputPtr ret) {
/* Avoid unused variable warning if features are disabled. */
(void) ctxt;
#ifdef LIBXML_HTTP_ENABLED
if ((ret != NULL) && (ret->buf != NULL) &&
(ret->buf->readcallback == xmlIOHTTPRead) &&
(ret->buf->context != NULL)) {
const char *encoding;
const char *redir;
const char *mime;
int code;
code = xmlNanoHTTPReturnCode(ret->buf->context);
if (code >= 400) {
/* fatal error */
if (ret->filename != NULL)
xmlCtxtErrIO(ctxt, XML_IO_LOAD_ERROR, ret->filename);
else
xmlCtxtErrIO(ctxt, XML_IO_LOAD_ERROR, "<null>");
xmlFreeInputStream(ret);
ret = NULL;
} else {
mime = xmlNanoHTTPMimeType(ret->buf->context);
if ((xmlStrstr(BAD_CAST mime, BAD_CAST "/xml")) ||
(xmlStrstr(BAD_CAST mime, BAD_CAST "+xml"))) {
encoding = xmlNanoHTTPEncoding(ret->buf->context);
if (encoding != NULL)
xmlSwitchEncodingName(ctxt, encoding);
#if 0
} else if (xmlStrstr(BAD_CAST mime, BAD_CAST "html")) {
#endif
}
redir = xmlNanoHTTPRedir(ret->buf->context);
if (redir != NULL) {
if (ret->filename != NULL)
xmlFree((xmlChar *) ret->filename);
ret->filename =
(char *) xmlStrdup((const xmlChar *) redir);
}
}
}
#endif
return(ret);
}
/**
* xmlInputCreateUrl:
* @filename: the filename to use as entity
* @flags: XML_INPUT flags
* @out: pointer to new parser input
*
* Create a new input stream based on a file or a URL.
*
* The flag XML_INPUT_UNZIP allows decompression.
*
* The flag XML_INPUT_NETWORK allows network access.
*
* Available since 2.14.0.
*
* Returns an xmlParserErrors code.
*/
int
xmlInputCreateUrl(const char *filename, int flags, xmlParserInputPtr *out) {
xmlParserInputBufferPtr buf;
xmlParserInputPtr input;
int code = XML_ERR_OK;
if (out == NULL)
return(XML_ERR_ARGUMENT);
*out = NULL;
if (filename == NULL)
return(XML_ERR_ARGUMENT);
if (xmlParserInputBufferCreateFilenameValue != NULL) {
buf = xmlParserInputBufferCreateFilenameValue(filename,
XML_CHAR_ENCODING_NONE);
if (buf == NULL)
code = XML_IO_ENOENT;
} else {
code = xmlParserInputBufferCreateUrl(filename, XML_CHAR_ENCODING_NONE,
flags, &buf);
}
if (code != XML_ERR_OK)
return(code);
input = xmlNewInputInternal(buf, filename);
if (input == NULL)
return(XML_ERR_NO_MEMORY);
/*input = xmlCheckHTTPInput(ctxt, input);*/
*out = input;
return(XML_ERR_OK);
}
/**
* xmlNewInputFromFile:
* @ctxt: an XML parser context
* @filename: the filename to use as entity
*
* Create a new input stream based on a file or an URL.
*
* Returns the new input stream or NULL in case of error
*/
xmlParserInputPtr
xmlNewInputFromFile(xmlParserCtxtPtr ctxt, const char *filename) {
xmlParserInputPtr input;
int flags = 0;
int code;
if ((ctxt == NULL) || (filename == NULL))
return(NULL);
if ((ctxt->options & XML_PARSE_NO_UNZIP) == 0)
flags |= XML_INPUT_UNZIP;
if ((ctxt->options & XML_PARSE_NONET) == 0)
flags |= XML_INPUT_NETWORK;
code = xmlInputCreateUrl(filename, flags, &input);
if (code != XML_ERR_OK) {
xmlCtxtErrIO(ctxt, code, filename);
return(NULL);
}
input = xmlCheckHTTPInput(ctxt, input);
return(input);
}
/**
* xmlDefaultExternalEntityLoader:
* @URL: the URL for the entity to load
* @ID: the System ID for the entity to load
* @ctxt: the context in which the entity is called or NULL
*
* By default we don't load external entities, yet.
*
* Returns a new allocated xmlParserInputPtr, or NULL.
*/
static xmlParserInputPtr
xmlDefaultExternalEntityLoader(const char *url, const char *ID,
xmlParserCtxtPtr ctxt)
{
xmlParserInputPtr input = NULL;
char *resource = NULL;
(void) ID;
if (url == NULL)
return(NULL);
#ifdef LIBXML_CATALOG_ENABLED
resource = (char *) xmlResolveResourceFromCatalog(url, ID, ctxt);
if (resource != NULL)
url = resource;
#endif
if ((ctxt != NULL) &&
(ctxt->options & XML_PARSE_NONET) &&
(xmlStrncasecmp(BAD_CAST url, BAD_CAST "http://", 7) == 0)) {
xmlCtxtErrIO(ctxt, XML_IO_NETWORK_ATTEMPT, url);
} else {
input = xmlNewInputFromFile(ctxt, url);
}
if (resource != NULL)
xmlFree(resource);
return(input);
}
/**
* xmlNoNetExternalEntityLoader:
* @URL: the URL for the entity to load
* @ID: the System ID for the entity to load
* @ctxt: the context in which the entity is called or NULL
*
* DEPRECATED: Use XML_PARSE_NONET.
*
* A specific entity loader disabling network accesses, though still
* allowing local catalog accesses for resolution.
*
* Returns a new allocated xmlParserInputPtr, or NULL.
*/
xmlParserInputPtr
xmlNoNetExternalEntityLoader(const char *URL, const char *ID,
xmlParserCtxtPtr ctxt) {
int oldOptions = 0;
xmlParserInputPtr input;
if (ctxt != NULL) {
oldOptions = ctxt->options;
ctxt->options |= XML_PARSE_NONET;
}
input = xmlDefaultExternalEntityLoader(URL, ID, ctxt);
if (ctxt != NULL)
ctxt->options = oldOptions;
return(input);
}
/*
* This global has to die eventually
*/
static xmlExternalEntityLoader
xmlCurrentExternalEntityLoader = xmlDefaultExternalEntityLoader;
/**
* xmlSetExternalEntityLoader:
* @f: the new entity resolver function
*
* DEPRECATED: This is a global setting and not thread-safe. Use
* xmlCtxtSetResourceLoader or similar functions.
*
* Changes the default external entity resolver function for the
* application.
*/
void
xmlSetExternalEntityLoader(xmlExternalEntityLoader f) {
xmlCurrentExternalEntityLoader = f;
}
/**
* xmlGetExternalEntityLoader:
*
* DEPRECATED: See xmlSetExternalEntityLoader.
*
* Get the default external entity resolver function for the application
*
* Returns the xmlExternalEntityLoader function pointer
*/
xmlExternalEntityLoader
xmlGetExternalEntityLoader(void) {
return(xmlCurrentExternalEntityLoader);
}
/**
* xmlCtxtSetResourceLoader:
* @ctxt: parser context
* @loader: callback
* @vctxt: user data
*
* Installs a custom callback to load documents, DTDs or external
* entities.
*
* Available since 2.14.0.
*/
void
xmlCtxtSetResourceLoader(xmlParserCtxtPtr ctxt, xmlResourceLoader loader,
void *vctxt) {
if (ctxt == NULL)
return;
ctxt->resourceLoader = loader;
ctxt->resourceCtxt = vctxt;
}
/**
* xmlLoadResource:
* @ctxt: parser context
* @url: the URL for the entity to load
* @publicId: the Public ID for the entity to load
* @type: resource type
*
* Returns the xmlParserInputPtr or NULL in case of error.
*/
xmlParserInputPtr
xmlLoadResource(xmlParserCtxtPtr ctxt, const char *url, const char *publicId,
xmlResourceType type) {
char *canonicFilename;
xmlParserInputPtr ret;
if (url == NULL)
return(NULL);
if ((ctxt != NULL) && (ctxt->resourceLoader != NULL)) {
int flags = 0;
int code;
if ((ctxt->options & XML_PARSE_NO_UNZIP) == 0)
flags |= XML_INPUT_UNZIP;
if ((ctxt->options & XML_PARSE_NONET) == 0)
flags |= XML_INPUT_NETWORK;
code = ctxt->resourceLoader(ctxt->resourceCtxt, url, publicId, flags,
type, &ret);
if (code != XML_ERR_OK) {
xmlCtxtErrIO(ctxt, code, url);
return(NULL);
}
return(ret);
}
canonicFilename = (char *) xmlCanonicPath((const xmlChar *) url);
if (canonicFilename == NULL) {
xmlCtxtErrMemory(ctxt);
return(NULL);
}
ret = xmlCurrentExternalEntityLoader(canonicFilename, publicId, ctxt);
xmlFree(canonicFilename);
return(ret);
}
/**
* xmlLoadExternalEntity:
* @URL: the URL for the entity to load
* @ID: the Public ID for the entity to load
* @ctxt: the context in which the entity is called or NULL
*
* @URL is a filename or URL. If if contains the substring "://",
* it is assumed to be a Legacy Extended IRI. Otherwise, it is
* treated as a filesystem path.
*
* @ID is an optional XML public ID, typically from a doctype
* declaration. It is used for catalog lookups.
*
* The following resource loaders will be called if they were
* registered (in order of precedence):
*
* - the resource loader set with xmlCtxtSetResourceLoader
* - the global external entity loader set with
* xmlSetExternalEntityLoader
* - the per-thread xmlParserInputBufferCreateFilenameFunc set with
* xmlParserInputBufferCreateFilenameDefault
* - the default loader which will return
* - the result from a matching global input callback set with
* xmlRegisterInputCallbacks
* - a HTTP resource if support is compiled in.
* - a file opened from the filesystem, with automatic detection
* of compressed files if support is compiled in.
*
* Returns the xmlParserInputPtr or NULL
*/
xmlParserInputPtr
xmlLoadExternalEntity(const char *URL, const char *ID,
xmlParserCtxtPtr ctxt) {
return(xmlLoadResource(ctxt, URL, ID, XML_RESOURCE_UNKNOWN));
}
/************************************************************************
* *
* Commodity functions to handle parser contexts *
* *
************************************************************************/
/**
* xmlInitSAXParserCtxt:
* @ctxt: XML parser context
* @sax: SAX handlert
* @userData: user data
*
* Initialize a SAX parser context
*
* Returns 0 in case of success and -1 in case of error
*/
static int
xmlInitSAXParserCtxt(xmlParserCtxtPtr ctxt, const xmlSAXHandler *sax,
void *userData)
{
xmlParserInputPtr input;
if (ctxt == NULL)
return(-1);
if (ctxt->dict == NULL)
ctxt->dict = xmlDictCreate();
if (ctxt->dict == NULL)
return(-1);
xmlDictSetLimit(ctxt->dict, XML_MAX_DICTIONARY_LIMIT);
if (ctxt->sax == NULL)
ctxt->sax = (xmlSAXHandler *) xmlMalloc(sizeof(xmlSAXHandler));
if (ctxt->sax == NULL)
return(-1);
if (sax == NULL) {
memset(ctxt->sax, 0, sizeof(xmlSAXHandler));
xmlSAXVersion(ctxt->sax, 2);
ctxt->userData = ctxt;
} else {
if (sax->initialized == XML_SAX2_MAGIC) {
memcpy(ctxt->sax, sax, sizeof(xmlSAXHandler));
} else {
memset(ctxt->sax, 0, sizeof(xmlSAXHandler));
memcpy(ctxt->sax, sax, sizeof(xmlSAXHandlerV1));
}
ctxt->userData = userData ? userData : ctxt;
}
ctxt->maxatts = 0;
ctxt->atts = NULL;
/* Allocate the Input stack */
if (ctxt->inputTab == NULL) {
ctxt->inputTab = (xmlParserInputPtr *)
xmlMalloc(5 * sizeof(xmlParserInputPtr));
ctxt->inputMax = 5;
}
if (ctxt->inputTab == NULL)
return(-1);
while ((input = inputPop(ctxt)) != NULL) { /* Non consuming */
xmlFreeInputStream(input);
}
ctxt->inputNr = 0;
ctxt->input = NULL;
ctxt->version = NULL;
ctxt->encoding = NULL;
ctxt->standalone = -1;
ctxt->hasExternalSubset = 0;
ctxt->hasPErefs = 0;
ctxt->html = 0;
ctxt->instate = XML_PARSER_START;
/* Allocate the Node stack */
if (ctxt->nodeTab == NULL) {
ctxt->nodeTab = (xmlNodePtr *) xmlMalloc(10 * sizeof(xmlNodePtr));
ctxt->nodeMax = 10;
}
if (ctxt->nodeTab == NULL)
return(-1);
ctxt->nodeNr = 0;
ctxt->node = NULL;
/* Allocate the Name stack */
if (ctxt->nameTab == NULL) {
ctxt->nameTab = (const xmlChar **) xmlMalloc(10 * sizeof(xmlChar *));
ctxt->nameMax = 10;
}
if (ctxt->nameTab == NULL)
return(-1);
ctxt->nameNr = 0;
ctxt->name = NULL;
/* Allocate the space stack */
if (ctxt->spaceTab == NULL) {
ctxt->spaceTab = (int *) xmlMalloc(10 * sizeof(int));
ctxt->spaceMax = 10;
}
if (ctxt->spaceTab == NULL)
return(-1);
ctxt->spaceNr = 1;
ctxt->spaceMax = 10;
ctxt->spaceTab[0] = -1;
ctxt->space = &ctxt->spaceTab[0];
ctxt->myDoc = NULL;
ctxt->wellFormed = 1;
ctxt->nsWellFormed = 1;
ctxt->valid = 1;
ctxt->options = XML_PARSE_NODICT;
/*
* Initialize some parser options from deprecated global variables.
* Note that the "modern" API taking options arguments or
* xmlCtxtSetOptions will ignore these defaults. They're only
* relevant if old API functions like xmlParseFile are used.
*/
ctxt->loadsubset = xmlLoadExtDtdDefaultValue;
if (ctxt->loadsubset) {
ctxt->options |= XML_PARSE_DTDLOAD;
}
ctxt->validate = xmlDoValidityCheckingDefaultValue;
if (ctxt->validate) {
ctxt->options |= XML_PARSE_DTDVALID;
}
ctxt->pedantic = xmlPedanticParserDefaultValue;
if (ctxt->pedantic) {
ctxt->options |= XML_PARSE_PEDANTIC;
}
ctxt->linenumbers = xmlLineNumbersDefaultValue;
ctxt->keepBlanks = xmlKeepBlanksDefaultValue;
if (ctxt->keepBlanks == 0) {
ctxt->sax->ignorableWhitespace = xmlSAX2IgnorableWhitespace;
ctxt->options |= XML_PARSE_NOBLANKS;
}
ctxt->replaceEntities = xmlSubstituteEntitiesDefaultValue;
if (ctxt->replaceEntities) {
ctxt->options |= XML_PARSE_NOENT;
}
if (xmlGetWarningsDefaultValue == 0)
ctxt->options |= XML_PARSE_NOWARNING;
ctxt->vctxt.flags = XML_VCTXT_USE_PCTXT;
ctxt->vctxt.userData = ctxt;
ctxt->vctxt.error = xmlParserValidityError;
ctxt->vctxt.warning = xmlParserValidityWarning;
ctxt->record_info = 0;
ctxt->checkIndex = 0;
ctxt->inSubset = 0;
ctxt->errNo = XML_ERR_OK;
ctxt->depth = 0;
ctxt->catalogs = NULL;
ctxt->sizeentities = 0;
ctxt->sizeentcopy = 0;
ctxt->input_id = 1;
ctxt->maxAmpl = XML_MAX_AMPLIFICATION_DEFAULT;
xmlInitNodeInfoSeq(&ctxt->node_seq);
if (ctxt->nsdb == NULL) {
ctxt->nsdb = xmlParserNsCreate();
if (ctxt->nsdb == NULL)
return(-1);
}
return(0);
}
/**
* xmlInitParserCtxt:
* @ctxt: an XML parser context
*
* DEPRECATED: Internal function which will be made private in a future
* version.
*
* Initialize a parser context
*
* Returns 0 in case of success and -1 in case of error
*/
int
xmlInitParserCtxt(xmlParserCtxtPtr ctxt)
{
return(xmlInitSAXParserCtxt(ctxt, NULL, NULL));
}
/**
* xmlFreeParserCtxt:
* @ctxt: an XML parser context
*
* Free all the memory used by a parser context. However the parsed
* document in ctxt->myDoc is not freed.
*/
void
xmlFreeParserCtxt(xmlParserCtxtPtr ctxt)
{
xmlParserInputPtr input;
if (ctxt == NULL) return;
while ((input = inputPop(ctxt)) != NULL) { /* Non consuming */
xmlFreeInputStream(input);
}
if (ctxt->spaceTab != NULL) xmlFree(ctxt->spaceTab);
if (ctxt->nameTab != NULL) xmlFree((xmlChar * *)ctxt->nameTab);
if (ctxt->nodeTab != NULL) xmlFree(ctxt->nodeTab);
if (ctxt->nodeInfoTab != NULL) xmlFree(ctxt->nodeInfoTab);
if (ctxt->inputTab != NULL) xmlFree(ctxt->inputTab);
if (ctxt->version != NULL) xmlFree((char *) ctxt->version);
if (ctxt->encoding != NULL) xmlFree((char *) ctxt->encoding);
if (ctxt->extSubURI != NULL) xmlFree((char *) ctxt->extSubURI);
if (ctxt->extSubSystem != NULL) xmlFree((char *) ctxt->extSubSystem);
#ifdef LIBXML_SAX1_ENABLED
if ((ctxt->sax != NULL) &&
(ctxt->sax != (xmlSAXHandlerPtr) &xmlDefaultSAXHandler))
#else
if (ctxt->sax != NULL)
#endif /* LIBXML_SAX1_ENABLED */
xmlFree(ctxt->sax);
if (ctxt->vctxt.nodeTab != NULL) xmlFree(ctxt->vctxt.nodeTab);
if (ctxt->atts != NULL) xmlFree((xmlChar * *)ctxt->atts);
if (ctxt->dict != NULL) xmlDictFree(ctxt->dict);
if (ctxt->nsTab != NULL) xmlFree(ctxt->nsTab);
if (ctxt->nsdb != NULL) xmlParserNsFree(ctxt->nsdb);
if (ctxt->attrHash != NULL) xmlFree(ctxt->attrHash);
if (ctxt->pushTab != NULL) xmlFree(ctxt->pushTab);
if (ctxt->attallocs != NULL) xmlFree(ctxt->attallocs);
if (ctxt->attsDefault != NULL)
xmlHashFree(ctxt->attsDefault, xmlHashDefaultDeallocator);
if (ctxt->attsSpecial != NULL)
xmlHashFree(ctxt->attsSpecial, NULL);
if (ctxt->freeElems != NULL) {
xmlNodePtr cur, next;
cur = ctxt->freeElems;
while (cur != NULL) {
next = cur->next;
xmlFree(cur);
cur = next;
}
}
if (ctxt->freeAttrs != NULL) {
xmlAttrPtr cur, next;
cur = ctxt->freeAttrs;
while (cur != NULL) {
next = cur->next;
xmlFree(cur);
cur = next;
}
}
/*
* cleanup the error strings
*/
if (ctxt->lastError.message != NULL)
xmlFree(ctxt->lastError.message);
if (ctxt->lastError.file != NULL)
xmlFree(ctxt->lastError.file);
if (ctxt->lastError.str1 != NULL)
xmlFree(ctxt->lastError.str1);
if (ctxt->lastError.str2 != NULL)
xmlFree(ctxt->lastError.str2);
if (ctxt->lastError.str3 != NULL)
xmlFree(ctxt->lastError.str3);
#ifdef LIBXML_CATALOG_ENABLED
if (ctxt->catalogs != NULL)
xmlCatalogFreeLocal(ctxt->catalogs);
#endif
xmlFree(ctxt);
}
/**
* xmlNewParserCtxt:
*
* Allocate and initialize a new parser context.
*
* Returns the xmlParserCtxtPtr or NULL
*/
xmlParserCtxtPtr
xmlNewParserCtxt(void)
{
return(xmlNewSAXParserCtxt(NULL, NULL));
}
/**
* xmlNewSAXParserCtxt:
* @sax: SAX handler
* @userData: user data
*
* Allocate and initialize a new SAX parser context. If userData is NULL,
* the parser context will be passed as user data.
*
* Available since 2.11.0. If you want support older versions,
* it's best to invoke xmlNewParserCtxt and set ctxt->sax with
* struct assignment.
*
* Returns the xmlParserCtxtPtr or NULL if memory allocation failed.
*/
xmlParserCtxtPtr
xmlNewSAXParserCtxt(const xmlSAXHandler *sax, void *userData)
{
xmlParserCtxtPtr ctxt;
xmlInitParser();
ctxt = (xmlParserCtxtPtr) xmlMalloc(sizeof(xmlParserCtxt));
if (ctxt == NULL)
return(NULL);
memset(ctxt, 0, sizeof(xmlParserCtxt));
if (xmlInitSAXParserCtxt(ctxt, sax, userData) < 0) {
xmlFreeParserCtxt(ctxt);
return(NULL);
}
return(ctxt);
}
/************************************************************************
* *
* Handling of node information *
* *
************************************************************************/
/**
* xmlClearParserCtxt:
* @ctxt: an XML parser context
*
* Clear (release owned resources) and reinitialize a parser context
*/
void
xmlClearParserCtxt(xmlParserCtxtPtr ctxt)
{
if (ctxt==NULL)
return;
xmlClearNodeInfoSeq(&ctxt->node_seq);
xmlCtxtReset(ctxt);
}
/**
* xmlParserFindNodeInfo:
* @ctx: an XML parser context
* @node: an XML node within the tree
*
* DEPRECATED: Don't use.
*
* Find the parser node info struct for a given node
*
* Returns an xmlParserNodeInfo block pointer or NULL
*/
const xmlParserNodeInfo *
xmlParserFindNodeInfo(xmlParserCtxtPtr ctx, xmlNodePtr node)
{
unsigned long pos;
if ((ctx == NULL) || (node == NULL))
return (NULL);
/* Find position where node should be at */
pos = xmlParserFindNodeInfoIndex(&ctx->node_seq, node);
if (pos < ctx->node_seq.length
&& ctx->node_seq.buffer[pos].node == node)
return &ctx->node_seq.buffer[pos];
else
return NULL;
}
/**
* xmlInitNodeInfoSeq:
* @seq: a node info sequence pointer
*
* DEPRECATED: Don't use.
*
* -- Initialize (set to initial state) node info sequence
*/
void
xmlInitNodeInfoSeq(xmlParserNodeInfoSeqPtr seq)
{
if (seq == NULL)
return;
seq->length = 0;
seq->maximum = 0;
seq->buffer = NULL;
}
/**
* xmlClearNodeInfoSeq:
* @seq: a node info sequence pointer
*
* DEPRECATED: Don't use.
*
* -- Clear (release memory and reinitialize) node
* info sequence
*/
void
xmlClearNodeInfoSeq(xmlParserNodeInfoSeqPtr seq)
{
if (seq == NULL)
return;
if (seq->buffer != NULL)
xmlFree(seq->buffer);
xmlInitNodeInfoSeq(seq);
}
/**
* xmlParserFindNodeInfoIndex:
* @seq: a node info sequence pointer
* @node: an XML node pointer
*
* DEPRECATED: Don't use.
*
* xmlParserFindNodeInfoIndex : Find the index that the info record for
* the given node is or should be at in a sorted sequence
*
* Returns a long indicating the position of the record
*/
unsigned long
xmlParserFindNodeInfoIndex(xmlParserNodeInfoSeqPtr seq,
xmlNodePtr node)
{
unsigned long upper, lower, middle;
int found = 0;
if ((seq == NULL) || (node == NULL))
return ((unsigned long) -1);
/* Do a binary search for the key */
lower = 1;
upper = seq->length;
middle = 0;
while (lower <= upper && !found) {
middle = lower + (upper - lower) / 2;
if (node == seq->buffer[middle - 1].node)
found = 1;
else if (node < seq->buffer[middle - 1].node)
upper = middle - 1;
else
lower = middle + 1;
}
/* Return position */
if (middle == 0 || seq->buffer[middle - 1].node < node)
return middle;
else
return middle - 1;
}
/**
* xmlParserAddNodeInfo:
* @ctxt: an XML parser context
* @info: a node info sequence pointer
*
* DEPRECATED: Don't use.
*
* Insert node info record into the sorted sequence
*/
void
xmlParserAddNodeInfo(xmlParserCtxtPtr ctxt,
xmlParserNodeInfoPtr info)
{
unsigned long pos;
if ((ctxt == NULL) || (info == NULL)) return;
/* Find pos and check to see if node is already in the sequence */
pos = xmlParserFindNodeInfoIndex(&ctxt->node_seq, (xmlNodePtr)
info->node);
if ((pos < ctxt->node_seq.length) &&
(ctxt->node_seq.buffer != NULL) &&
(ctxt->node_seq.buffer[pos].node == info->node)) {
ctxt->node_seq.buffer[pos] = *info;
}
/* Otherwise, we need to add new node to buffer */
else {
if ((ctxt->node_seq.length + 1 > ctxt->node_seq.maximum) ||
(ctxt->node_seq.buffer == NULL)) {
xmlParserNodeInfo *tmp_buffer;
unsigned int byte_size;
if (ctxt->node_seq.maximum == 0)
ctxt->node_seq.maximum = 2;
byte_size = (sizeof(*ctxt->node_seq.buffer) *
(2 * ctxt->node_seq.maximum));
if (ctxt->node_seq.buffer == NULL)
tmp_buffer = (xmlParserNodeInfo *) xmlMalloc(byte_size);
else
tmp_buffer =
(xmlParserNodeInfo *) xmlRealloc(ctxt->node_seq.buffer,
byte_size);
if (tmp_buffer == NULL) {
xmlCtxtErrMemory(ctxt);
return;
}
ctxt->node_seq.buffer = tmp_buffer;
ctxt->node_seq.maximum *= 2;
}
/* If position is not at end, move elements out of the way */
if (pos != ctxt->node_seq.length) {
unsigned long i;
for (i = ctxt->node_seq.length; i > pos; i--)
ctxt->node_seq.buffer[i] = ctxt->node_seq.buffer[i - 1];
}
/* Copy element and increase length */
ctxt->node_seq.buffer[pos] = *info;
ctxt->node_seq.length++;
}
}
/************************************************************************
* *
* Defaults settings *
* *
************************************************************************/
/**
* xmlPedanticParserDefault:
* @val: int 0 or 1
*
* DEPRECATED: Use the modern options API with XML_PARSE_PEDANTIC.
*
* Set and return the previous value for enabling pedantic warnings.
*
* Returns the last value for 0 for no substitution, 1 for substitution.
*/
int
xmlPedanticParserDefault(int val) {
int old = xmlPedanticParserDefaultValue;
xmlPedanticParserDefaultValue = val;
return(old);
}
/**
* xmlLineNumbersDefault:
* @val: int 0 or 1
*
* DEPRECATED: The modern options API always enables line numbers.
*
* Set and return the previous value for enabling line numbers in elements
* contents. This may break on old application and is turned off by default.
*
* Returns the last value for 0 for no substitution, 1 for substitution.
*/
int
xmlLineNumbersDefault(int val) {
int old = xmlLineNumbersDefaultValue;
xmlLineNumbersDefaultValue = val;
return(old);
}
/**
* xmlSubstituteEntitiesDefault:
* @val: int 0 or 1
*
* DEPRECATED: Use the modern options API with XML_PARSE_NOENT.
*
* Set and return the previous value for default entity support.
* Initially the parser always keep entity references instead of substituting
* entity values in the output. This function has to be used to change the
* default parser behavior
* SAX::substituteEntities() has to be used for changing that on a file by
* file basis.
*
* Returns the last value for 0 for no substitution, 1 for substitution.
*/
int
xmlSubstituteEntitiesDefault(int val) {
int old = xmlSubstituteEntitiesDefaultValue;
xmlSubstituteEntitiesDefaultValue = val;
return(old);
}
/**
* xmlKeepBlanksDefault:
* @val: int 0 or 1
*
* DEPRECATED: Use the modern options API with XML_PARSE_NOBLANKS.
*
* Set and return the previous value for default blanks text nodes support.
* The 1.x version of the parser used an heuristic to try to detect
* ignorable white spaces. As a result the SAX callback was generating
* xmlSAX2IgnorableWhitespace() callbacks instead of characters() one, and when
* using the DOM output text nodes containing those blanks were not generated.
* The 2.x and later version will switch to the XML standard way and
* ignorableWhitespace() are only generated when running the parser in
* validating mode and when the current element doesn't allow CDATA or
* mixed content.
* This function is provided as a way to force the standard behavior
* on 1.X libs and to switch back to the old mode for compatibility when
* running 1.X client code on 2.X . Upgrade of 1.X code should be done
* by using xmlIsBlankNode() commodity function to detect the "empty"
* nodes generated.
* This value also affect autogeneration of indentation when saving code
* if blanks sections are kept, indentation is not generated.
*
* Returns the last value for 0 for no substitution, 1 for substitution.
*/
int
xmlKeepBlanksDefault(int val) {
int old = xmlKeepBlanksDefaultValue;
xmlKeepBlanksDefaultValue = val;
#ifdef LIBXML_OUTPUT_ENABLED
if (!val)
xmlIndentTreeOutput = 1;
#endif
return(old);
}
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