forked from GNOME/libxml2
/
error.c
1316 lines (1224 loc) · 38.7 KB
/
error.c
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/*
* error.c: module displaying/handling XML parser errors
*
* See Copyright for the status of this software.
*
* Daniel Veillard <daniel@veillard.com>
*/
#define IN_LIBXML
#include "libxml.h"
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <libxml/parser.h>
#include <libxml/xmlerror.h>
#include <libxml/xmlmemory.h>
#include "private/error.h"
#include "private/string.h"
/************************************************************************
* *
* Error struct *
* *
************************************************************************/
static int
xmlVSetError(xmlError *err,
void *ctxt, xmlNodePtr node,
int domain, int code, xmlErrorLevel level,
const char *file, int line,
const char *str1, const char *str2, const char *str3,
int int1, int col,
const char *fmt, va_list ap)
{
char *message = NULL;
char *fileCopy = NULL;
char *str1Copy = NULL;
char *str2Copy = NULL;
char *str3Copy = NULL;
if (code == XML_ERR_OK) {
xmlResetError(err);
return(0);
}
/*
* Formatting the message
*/
if (fmt == NULL) {
message = xmlMemStrdup("No error message provided");
} else {
xmlChar *tmp;
int res;
res = xmlStrVASPrintf(&tmp, MAX_ERR_MSG_SIZE, fmt, ap);
if (res < 0)
goto err_memory;
message = (char *) tmp;
}
if (message == NULL)
goto err_memory;
if (file != NULL) {
fileCopy = (char *) xmlStrdup((const xmlChar *) file);
if (fileCopy == NULL)
goto err_memory;
}
if (str1 != NULL) {
str1Copy = (char *) xmlStrdup((const xmlChar *) str1);
if (str1Copy == NULL)
goto err_memory;
}
if (str2 != NULL) {
str2Copy = (char *) xmlStrdup((const xmlChar *) str2);
if (str2Copy == NULL)
goto err_memory;
}
if (str3 != NULL) {
str3Copy = (char *) xmlStrdup((const xmlChar *) str3);
if (str3Copy == NULL)
goto err_memory;
}
xmlResetError(err);
err->domain = domain;
err->code = code;
err->message = message;
err->level = level;
err->file = fileCopy;
err->line = line;
err->str1 = str1Copy;
err->str2 = str2Copy;
err->str3 = str3Copy;
err->int1 = int1;
err->int2 = col;
err->node = node;
err->ctxt = ctxt;
return(0);
err_memory:
xmlFree(message);
xmlFree(fileCopy);
xmlFree(str1Copy);
xmlFree(str2Copy);
xmlFree(str3Copy);
return(-1);
}
static int LIBXML_ATTR_FORMAT(14,15)
xmlSetError(xmlError *err,
void *ctxt, xmlNodePtr node,
int domain, int code, xmlErrorLevel level,
const char *file, int line,
const char *str1, const char *str2, const char *str3,
int int1, int col,
const char *fmt, ...)
{
va_list ap;
int res;
va_start(ap, fmt);
res = xmlVSetError(err, ctxt, node, domain, code, level, file, line,
str1, str2, str3, int1, col, fmt, ap);
va_end(ap);
return(res);
}
static int
xmlVUpdateError(xmlError *err,
void *ctxt, xmlNodePtr node,
int domain, int code, xmlErrorLevel level,
const char *file, int line,
const char *str1, const char *str2, const char *str3,
int int1, int col,
const char *fmt, va_list ap)
{
int res;
/*
* Find first element parent.
*/
if (node != NULL) {
int i;
for (i = 0; i < 10; i++) {
if ((node->type == XML_ELEMENT_NODE) ||
(node->parent == NULL))
break;
node = node->parent;
}
}
/*
* Get file and line from node.
*/
if (node != NULL) {
if ((file == NULL) && (node->doc != NULL))
file = (const char *) node->doc->URL;
if (line == 0) {
if (node->type == XML_ELEMENT_NODE)
line = node->line;
if ((line == 0) || (line == 65535))
line = xmlGetLineNo(node);
}
}
res = xmlVSetError(err, ctxt, node, domain, code, level, file, line,
str1, str2, str3, int1, col, fmt, ap);
return(res);
}
/************************************************************************
* *
* Handling of out of context errors *
* *
************************************************************************/
/**
* xmlGenericErrorDefaultFunc:
* @ctx: an error context
* @msg: the message to display/transmit
* @...: extra parameters for the message display
*
* Default handler for out of context error messages.
*/
void
xmlGenericErrorDefaultFunc(void *ctx ATTRIBUTE_UNUSED, const char *msg, ...) {
va_list args;
if (xmlGenericErrorContext == NULL)
xmlGenericErrorContext = (void *) stderr;
va_start(args, msg);
vfprintf((FILE *)xmlGenericErrorContext, msg, args);
va_end(args);
}
/**
* initGenericErrorDefaultFunc:
* @handler: the handler
*
* DEPRECATED: Use xmlSetGenericErrorFunc.
*
* Set or reset (if NULL) the default handler for generic errors
* to the builtin error function.
*/
void
initGenericErrorDefaultFunc(xmlGenericErrorFunc * handler)
{
if (handler == NULL)
xmlGenericError = xmlGenericErrorDefaultFunc;
else
xmlGenericError = (*handler);
}
/**
* xmlSetGenericErrorFunc:
* @ctx: the new error handling context
* @handler: the new handler function
*
* DEPRECATED: See xmlSetStructuredErrorFunc for alternatives.
*
* Set the global "generic" handler and context for error messages.
* The generic error handler will only receive fragments of error
* messages which should be concatenated or printed to a stream.
*
* If handler is NULL, use the built-in default handler which prints
* to stderr.
*
* Since this is a global setting, it's a good idea to reset the
* error handler to its default value after collecting the errors
* you're interested in.
*
* For multi-threaded applications, this must be set separately for
* each thread.
*/
void
xmlSetGenericErrorFunc(void *ctx, xmlGenericErrorFunc handler) {
xmlGenericErrorContext = ctx;
if (handler != NULL)
xmlGenericError = handler;
else
xmlGenericError = xmlGenericErrorDefaultFunc;
}
/**
* xmlSetStructuredErrorFunc:
* @ctx: the new error handling context
* @handler: the new handler function
*
* DEPRECATED: Use a per-context error handler.
*
* It's recommended to use the per-context error handlers instead:
*
* - xmlCtxtSetErrorHandler (since 2.13.0)
* - xmlTextReaderSetStructuredErrorHandler
* - xmlXPathSetErrorHandler (since 2.13.0)
* - xmlXIncludeSetErrorHandler (since 2.13.0)
* - xmlSchemaSetParserStructuredErrors
* - xmlSchemaSetValidStructuredErrors
* - xmlRelaxNGSetParserStructuredErrors
* - xmlRelaxNGSetValidStructuredErrors
*
* Set the global "structured" handler and context for error messages.
* If handler is NULL, the error handler is deactivated.
*
* The structured error handler takes precedence over "generic"
* handlers, even per-context generic handlers.
*
* Since this is a global setting, it's a good idea to deactivate the
* error handler after collecting the errors you're interested in.
*
* For multi-threaded applications, this must be set separately for
* each thread.
*/
void
xmlSetStructuredErrorFunc(void *ctx, xmlStructuredErrorFunc handler) {
xmlStructuredErrorContext = ctx;
xmlStructuredError = handler;
}
/************************************************************************
* *
* Handling of parsing errors *
* *
************************************************************************/
/**
* xmlParserPrintFileInfo:
* @input: an xmlParserInputPtr input
*
* DEPRECATED: Use xmlFormatError.
*
* Displays the associated file and line information for the current input
*/
void
xmlParserPrintFileInfo(xmlParserInputPtr input) {
if (input != NULL) {
if (input->filename)
xmlGenericError(xmlGenericErrorContext,
"%s:%d: ", input->filename,
input->line);
else
xmlGenericError(xmlGenericErrorContext,
"Entity: line %d: ", input->line);
}
}
/**
* xmlParserPrintFileContextInternal:
* @input: an xmlParserInputPtr input
*
* Displays current context within the input content for error tracking
*/
static void
xmlParserPrintFileContextInternal(xmlParserInputPtr input ,
xmlGenericErrorFunc channel, void *data ) {
const xmlChar *cur, *base, *start;
unsigned int n, col; /* GCC warns if signed, because compared with sizeof() */
xmlChar content[81]; /* space for 80 chars + line terminator */
xmlChar *ctnt;
if ((input == NULL) || (input->cur == NULL))
return;
cur = input->cur;
base = input->base;
/* skip backwards over any end-of-lines */
while ((cur > base) && ((*(cur) == '\n') || (*(cur) == '\r'))) {
cur--;
}
n = 0;
/* search backwards for beginning-of-line (to max buff size) */
while ((n < sizeof(content) - 1) && (cur > base) &&
(*cur != '\n') && (*cur != '\r')) {
cur--;
n++;
}
if ((n > 0) && ((*cur == '\n') || (*cur == '\r'))) {
cur++;
} else {
/* skip over continuation bytes */
while ((cur < input->cur) && ((*cur & 0xC0) == 0x80))
cur++;
}
/* calculate the error position in terms of the current position */
col = input->cur - cur;
/* search forward for end-of-line (to max buff size) */
n = 0;
start = cur;
/* copy selected text to our buffer */
while ((*cur != 0) && (*(cur) != '\n') && (*(cur) != '\r')) {
int len = input->end - cur;
int c = xmlGetUTF8Char(cur, &len);
if ((c < 0) || (n + len > sizeof(content)-1))
break;
cur += len;
n += len;
}
memcpy(content, start, n);
content[n] = 0;
/* print out the selected text */
channel(data ,"%s\n", content);
/* create blank line with problem pointer */
n = 0;
ctnt = content;
/* (leave buffer space for pointer + line terminator) */
while ((n<col) && (n++ < sizeof(content)-2) && (*ctnt != 0)) {
if (*(ctnt) != '\t')
*(ctnt) = ' ';
ctnt++;
}
*ctnt++ = '^';
*ctnt = 0;
channel(data ,"%s\n", content);
}
/**
* xmlParserPrintFileContext:
* @input: an xmlParserInputPtr input
*
* DEPRECATED: Use xmlFormatError.
*
* Displays current context within the input content for error tracking
*/
void
xmlParserPrintFileContext(xmlParserInputPtr input) {
xmlParserPrintFileContextInternal(input, xmlGenericError,
xmlGenericErrorContext);
}
/**
* xmlFormatError:
* @err: the error
* @channel: callback
* @data: user data for callback
*
* Report a formatted error to a printf-like callback.
*
* This can result in a verbose multi-line report including additional
* information from the parser context.
*/
void
xmlFormatError(const xmlError *err, xmlGenericErrorFunc channel, void *data)
{
const char *message;
const char *file;
int line;
int code;
int domain;
const xmlChar *name = NULL;
xmlNodePtr node;
xmlErrorLevel level;
xmlParserCtxtPtr ctxt = NULL;
xmlParserInputPtr input = NULL;
xmlParserInputPtr cur = NULL;
if ((err == NULL) || (channel == NULL))
return;
message = err->message;
file = err->file;
line = err->line;
code = err->code;
domain = err->domain;
level = err->level;
node = err->node;
if (code == XML_ERR_OK)
return;
if ((domain == XML_FROM_PARSER) || (domain == XML_FROM_HTML) ||
(domain == XML_FROM_DTD) || (domain == XML_FROM_NAMESPACE) ||
(domain == XML_FROM_IO) || (domain == XML_FROM_VALID)) {
ctxt = err->ctxt;
}
if ((node != NULL) && (node->type == XML_ELEMENT_NODE) &&
(domain != XML_FROM_SCHEMASV))
name = node->name;
/*
* Maintain the compatibility with the legacy error handling
*/
if ((ctxt != NULL) && (ctxt->input != NULL)) {
input = ctxt->input;
if ((input->filename == NULL) &&
(ctxt->inputNr > 1)) {
cur = input;
input = ctxt->inputTab[ctxt->inputNr - 2];
}
if (input->filename)
channel(data, "%s:%d: ", input->filename, input->line);
else if ((line != 0) && (domain == XML_FROM_PARSER))
channel(data, "Entity: line %d: ", input->line);
} else {
if (file != NULL)
channel(data, "%s:%d: ", file, line);
else if ((line != 0) &&
((domain == XML_FROM_PARSER) || (domain == XML_FROM_SCHEMASV)||
(domain == XML_FROM_SCHEMASP)||(domain == XML_FROM_DTD) ||
(domain == XML_FROM_RELAXNGP)||(domain == XML_FROM_RELAXNGV)))
channel(data, "Entity: line %d: ", line);
}
if (name != NULL) {
channel(data, "element %s: ", name);
}
switch (domain) {
case XML_FROM_PARSER:
channel(data, "parser ");
break;
case XML_FROM_NAMESPACE:
channel(data, "namespace ");
break;
case XML_FROM_DTD:
case XML_FROM_VALID:
channel(data, "validity ");
break;
case XML_FROM_HTML:
channel(data, "HTML parser ");
break;
case XML_FROM_MEMORY:
channel(data, "memory ");
break;
case XML_FROM_OUTPUT:
channel(data, "output ");
break;
case XML_FROM_IO:
channel(data, "I/O ");
break;
case XML_FROM_XINCLUDE:
channel(data, "XInclude ");
break;
case XML_FROM_XPATH:
channel(data, "XPath ");
break;
case XML_FROM_XPOINTER:
channel(data, "parser ");
break;
case XML_FROM_REGEXP:
channel(data, "regexp ");
break;
case XML_FROM_MODULE:
channel(data, "module ");
break;
case XML_FROM_SCHEMASV:
channel(data, "Schemas validity ");
break;
case XML_FROM_SCHEMASP:
channel(data, "Schemas parser ");
break;
case XML_FROM_RELAXNGP:
channel(data, "Relax-NG parser ");
break;
case XML_FROM_RELAXNGV:
channel(data, "Relax-NG validity ");
break;
case XML_FROM_CATALOG:
channel(data, "Catalog ");
break;
case XML_FROM_C14N:
channel(data, "C14N ");
break;
case XML_FROM_XSLT:
channel(data, "XSLT ");
break;
case XML_FROM_I18N:
channel(data, "encoding ");
break;
case XML_FROM_SCHEMATRONV:
channel(data, "schematron ");
break;
case XML_FROM_BUFFER:
channel(data, "internal buffer ");
break;
case XML_FROM_URI:
channel(data, "URI ");
break;
default:
break;
}
switch (level) {
case XML_ERR_NONE:
channel(data, ": ");
break;
case XML_ERR_WARNING:
channel(data, "warning : ");
break;
case XML_ERR_ERROR:
channel(data, "error : ");
break;
case XML_ERR_FATAL:
channel(data, "error : ");
break;
}
if (message != NULL) {
int len;
len = xmlStrlen((const xmlChar *) message);
if ((len > 0) && (message[len - 1] != '\n'))
channel(data, "%s\n", message);
else
channel(data, "%s", message);
} else {
channel(data, "%s\n", "No error message provided");
}
if (ctxt != NULL) {
if ((input != NULL) &&
((input->buf == NULL) || (input->buf->encoder == NULL)) &&
(code == XML_ERR_INVALID_ENCODING) &&
(input->cur < input->end)) {
int i;
channel(data, "Bytes:");
for (i = 0; i < 4; i++) {
if (input->cur + i >= input->end)
break;
channel(data, " 0x%02X", input->cur[i]);
}
channel(data, "\n");
}
xmlParserPrintFileContextInternal(input, channel, data);
if (cur != NULL) {
if (cur->filename)
channel(data, "%s:%d: \n", cur->filename, cur->line);
else if ((line != 0) && (domain == XML_FROM_PARSER))
channel(data, "Entity: line %d: \n", cur->line);
xmlParserPrintFileContextInternal(cur, channel, data);
}
}
if ((domain == XML_FROM_XPATH) && (err->str1 != NULL) &&
(err->int1 < 100) &&
(err->int1 < xmlStrlen((const xmlChar *)err->str1))) {
xmlChar buf[150];
int i;
channel(data, "%s\n", err->str1);
for (i=0;i < err->int1;i++)
buf[i] = ' ';
buf[i++] = '^';
buf[i] = 0;
channel(data, "%s\n", buf);
}
}
/**
* xmlRaiseMemoryError:
* @schannel: the structured callback channel
* @channel: the old callback channel
* @data: the callback data
* @domain: the domain for the error
* @error: optional error struct to be filled
*
* Update the global and optional error structure, then forward the
* error to an error handler.
*
* This function doesn't make memory allocations which are likely
* to fail after an OOM error.
*/
void
xmlRaiseMemoryError(xmlStructuredErrorFunc schannel, xmlGenericErrorFunc channel,
void *data, int domain, xmlError *error)
{
xmlError *lastError = &xmlLastError;
xmlResetLastError();
lastError->domain = domain;
lastError->code = XML_ERR_NO_MEMORY;
lastError->level = XML_ERR_FATAL;
if (error != NULL) {
xmlResetError(error);
error->domain = domain;
error->code = XML_ERR_NO_MEMORY;
error->level = XML_ERR_FATAL;
}
if (schannel != NULL) {
schannel(data, lastError);
} else if (xmlStructuredError != NULL) {
xmlStructuredError(xmlStructuredErrorContext, lastError);
} else if (channel != NULL) {
channel(data, "libxml2: out of memory\n");
}
}
/**
* xmlVRaiseError:
* @schannel: the structured callback channel
* @channel: the old callback channel
* @data: the callback data
* @ctx: the parser context or NULL
* @ctx: the parser context or NULL
* @domain: the domain for the error
* @code: the code for the error
* @level: the xmlErrorLevel for the error
* @file: the file source of the error (or NULL)
* @line: the line of the error or 0 if N/A
* @str1: extra string info
* @str2: extra string info
* @str3: extra string info
* @int1: extra int info
* @col: column number of the error or 0 if N/A
* @msg: the message to display/transmit
* @ap: extra parameters for the message display
*
* Update the appropriate global or contextual error structure,
* then forward the error message down the parser or generic
* error callback handler
*
* Returns 0 on success, -1 if a memory allocation failed.
*/
int
xmlVRaiseError(xmlStructuredErrorFunc schannel,
xmlGenericErrorFunc channel, void *data, void *ctx,
xmlNode *node, int domain, int code, xmlErrorLevel level,
const char *file, int line, const char *str1,
const char *str2, const char *str3, int int1, int col,
const char *msg, va_list ap)
{
xmlParserCtxtPtr ctxt = NULL;
/* xmlLastError is a macro retrieving the per-thread global. */
xmlErrorPtr lastError = &xmlLastError;
xmlErrorPtr to = lastError;
if (code == XML_ERR_OK)
return(0);
#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
if ((code == XML_ERR_INTERNAL_ERROR) ||
(code == XML_ERR_ARGUMENT)) {
fprintf(stderr, "Unexpected error: %d\n", code);
abort();
}
#endif
if ((xmlGetWarningsDefaultValue == 0) && (level == XML_ERR_WARNING))
return(0);
if ((domain == XML_FROM_PARSER) || (domain == XML_FROM_HTML) ||
(domain == XML_FROM_DTD) || (domain == XML_FROM_NAMESPACE) ||
(domain == XML_FROM_IO) || (domain == XML_FROM_VALID)) {
ctxt = (xmlParserCtxtPtr) ctx;
if (ctxt != NULL)
to = &ctxt->lastError;
}
if (xmlVUpdateError(to, ctxt, node, domain, code, level, file, line,
str1, str2, str3, int1, col, msg, ap))
return(-1);
if (to != lastError) {
if (xmlCopyError(to, lastError) < 0)
return(-1);
}
if (schannel != NULL) {
schannel(data, to);
} else if (xmlStructuredError != NULL) {
xmlStructuredError(xmlStructuredErrorContext, to);
} else if (channel != NULL) {
if ((ctxt == NULL) && (channel == xmlGenericErrorDefaultFunc))
xmlFormatError(to, xmlGenericError, xmlGenericErrorContext);
else
channel(data, "%s", to->message);
}
return(0);
}
/**
* __xmlRaiseError:
* @schannel: the structured callback channel
* @channel: the old callback channel
* @data: the callback data
* @ctx: the parser context or NULL
* @nod: the node or NULL
* @domain: the domain for the error
* @code: the code for the error
* @level: the xmlErrorLevel for the error
* @file: the file source of the error (or NULL)
* @line: the line of the error or 0 if N/A
* @str1: extra string info
* @str2: extra string info
* @str3: extra string info
* @int1: extra int info
* @col: column number of the error or 0 if N/A
* @msg: the message to display/transmit
* @...: extra parameters for the message display
*
* Update the appropriate global or contextual error structure,
* then forward the error message down the parser or generic
* error callback handler
*
* Returns 0 on success, -1 if a memory allocation failed.
*/
int
__xmlRaiseError(xmlStructuredErrorFunc schannel,
xmlGenericErrorFunc channel, void *data, void *ctx,
xmlNode *node, int domain, int code, xmlErrorLevel level,
const char *file, int line, const char *str1,
const char *str2, const char *str3, int int1, int col,
const char *msg, ...)
{
va_list ap;
int res;
va_start(ap, msg);
res = xmlVRaiseError(schannel, channel, data, ctx, node, domain, code,
level, file, line, str1, str2, str3, int1, col, msg,
ap);
va_end(ap);
return(res);
}
/**
* xmlParserError:
* @ctx: an XML parser context
* @msg: the message to display/transmit
* @...: extra parameters for the message display
*
* Display and format an error messages, gives file, line, position and
* extra parameters.
*/
void
xmlParserError(void *ctx, const char *msg ATTRIBUTE_UNUSED, ...)
{
xmlParserCtxtPtr ctxt = ctx;
xmlFormatError(&ctxt->lastError, xmlGenericError, xmlGenericErrorContext);
}
/**
* xmlParserWarning:
* @ctx: an XML parser context
* @msg: the message to display/transmit
* @...: extra parameters for the message display
*
* Display and format a warning messages, gives file, line, position and
* extra parameters.
*/
void
xmlParserWarning(void *ctx, const char *msg ATTRIBUTE_UNUSED, ...)
{
xmlParserCtxtPtr ctxt = ctx;
xmlFormatError(&ctxt->lastError, xmlGenericError, xmlGenericErrorContext);
}
/**
* xmlParserValidityError:
* @ctx: an XML parser context
* @msg: the message to display/transmit
* @...: extra parameters for the message display
*
* Display and format an validity error messages, gives file,
* line, position and extra parameters.
*/
void
xmlParserValidityError(void *ctx, const char *msg ATTRIBUTE_UNUSED, ...)
{
xmlParserCtxtPtr ctxt = ctx;
xmlFormatError(&ctxt->lastError, xmlGenericError, xmlGenericErrorContext);
}
/**
* xmlParserValidityWarning:
* @ctx: an XML parser context
* @msg: the message to display/transmit
* @...: extra parameters for the message display
*
* Display and format a validity warning messages, gives file, line,
* position and extra parameters.
*/
void
xmlParserValidityWarning(void *ctx, const char *msg ATTRIBUTE_UNUSED, ...)
{
xmlParserCtxtPtr ctxt = ctx;
xmlFormatError(&ctxt->lastError, xmlGenericError, xmlGenericErrorContext);
}
/************************************************************************
* *
* Extended Error Handling *
* *
************************************************************************/
/**
* xmlGetLastError:
*
* Get the last global error registered. This is per thread if compiled
* with thread support.
*
* Returns a pointer to the error
*/
const xmlError *
xmlGetLastError(void)
{
if (xmlLastError.code == XML_ERR_OK)
return (NULL);
return (&xmlLastError);
}
/**
* xmlResetError:
* @err: pointer to the error.
*
* Cleanup the error.
*/
void
xmlResetError(xmlErrorPtr err)
{
if (err == NULL)
return;
if (err->code == XML_ERR_OK)
return;
if (err->message != NULL)
xmlFree(err->message);
if (err->file != NULL)
xmlFree(err->file);
if (err->str1 != NULL)
xmlFree(err->str1);
if (err->str2 != NULL)
xmlFree(err->str2);
if (err->str3 != NULL)
xmlFree(err->str3);
memset(err, 0, sizeof(xmlError));
err->code = XML_ERR_OK;
}
/**
* xmlResetLastError:
*
* Cleanup the last global error registered. For parsing error
* this does not change the well-formedness result.
*/
void
xmlResetLastError(void)
{
if (xmlLastError.code == XML_ERR_OK)
return;
xmlResetError(&xmlLastError);
}
/**
* xmlCtxtGetLastError:
* @ctx: an XML parser context
*
* Get the last parsing error registered.
*
* Returns NULL if no error occurred or a pointer to the error
*/
const xmlError *
xmlCtxtGetLastError(void *ctx)
{
xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
if (ctxt == NULL)
return (NULL);
if (ctxt->lastError.code == XML_ERR_OK)
return (NULL);
return (&ctxt->lastError);
}
/**
* xmlCtxtResetLastError:
* @ctx: an XML parser context
*
* Cleanup the last global error registered. For parsing error
* this does not change the well-formedness result.
*/
void
xmlCtxtResetLastError(void *ctx)
{
xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
if (ctxt == NULL)
return;
ctxt->errNo = XML_ERR_OK;
if (ctxt->lastError.code == XML_ERR_OK)
return;
xmlResetError(&ctxt->lastError);
}
/**
* xmlCopyError:
* @from: a source error
* @to: a target error
*
* Save the original error to the new place.
*
* Returns 0 in case of success and -1 in case of error.
*/
int
xmlCopyError(const xmlError *from, xmlErrorPtr to) {
const char *fmt = NULL;
if ((from == NULL) || (to == NULL))
return(-1);
if (from->message != NULL)
fmt = "%s";
return(xmlSetError(to, from->ctxt, from->node,
from->domain, from->code, from->level,
from->file, from->line,
from->str1, from->str2, from->str3,
from->int1, from->int2,
fmt, from->message));
}
/**
* xmlErrString:
* @code: an xmlParserErrors code
*
* Returns an error message for a code.
*/
const char *
xmlErrString(xmlParserErrors code) {
const char *errmsg;
switch (code) {
case XML_ERR_INVALID_HEX_CHARREF:
errmsg = "CharRef: invalid hexadecimal value";
break;