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c5a8aef2f6
libxml2/error.c
Nick Wellnhofer c5a8aef2f6 error: Refactor error reporting 
Introduce xmlStrVASPrintf, trying to handle buggy snprintf
implementations.

Introduce xmlSetError to set errors atomically.

Introduce xmlUpdateError to set an error, fixing up node, file and line.

Introduce helper function xmlRaiseMemoryError.

Make legacy error handlers call xmlReportError, avoiding checks in
xmlVRaiseError.

Remove fragile support for getting file and line info from XInclude
nodes.
2023-12-21 02:46:27 +01:00

953 lines
26 KiB
C
Raw Blame History

/*
* 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 <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
*
* Function to reset the handler and the error context for out of
* context error messages.
* This simply means that @handler will be called for subsequent
* error messages while not parsing nor validating. And @ctx will
* be passed as first argument to @handler
* One can simply force messages to be emitted to another FILE * than
* stderr by setting @ctx to this file handle and @handler to NULL.
* 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
*
* Function to reset the handler and the error context for out of
* context structured error messages.
* This simply means that @handler will be called for subsequent
* error messages while not parsing nor validating. And @ctx will
* be passed as first argument to @handler
* 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
*
* 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
*
* Displays current context within the input content for error tracking
*/
void
xmlParserPrintFileContext(xmlParserInputPtr input) {
xmlParserPrintFileContextInternal(input, xmlGenericError,
xmlGenericErrorContext);
}
/**
* xmlReportError:
* @err: the error
* @ctx: the parser context or NULL
* @str: the formatted error message
*
* Report an error with its context, replace the 4 old error/warning
* routines.
*/
static void
xmlReportError(xmlParserCtxtPtr ctxt, 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;
xmlParserInputPtr input = NULL;
xmlParserInputPtr cur = NULL;
if (err == NULL) {
if (ctxt == NULL)
return;
err = &ctxt->lastError;
}
channel = xmlGenericError;
data = xmlGenericErrorContext;
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 ((node != NULL) && (node->type == XML_ELEMENT_NODE))
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) {
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);
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 ((ctxt == NULL) && (channel == NULL)) {
xmlGenericError(xmlGenericErrorContext, "%s", to->message);
} else if (channel != NULL) {
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);
}
/**
* __xmlSimpleError:
* @domain: where the error comes from
* @code: the error code
* @node: the context node
* @extra: extra information
*
* Handle an out of memory condition
*/
void
__xmlSimpleError(int domain, int code, xmlNodePtr node,
const char *msg, const char *extra)
{
if (code == XML_ERR_NO_MEMORY) {
if (extra)
__xmlRaiseError(NULL, NULL, NULL, NULL, node, domain,
XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, extra,
NULL, NULL, 0, 0,
"Memory allocation failed : %s\n", extra);
else
__xmlRaiseError(NULL, NULL, NULL, NULL, node, domain,
XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, NULL,
NULL, NULL, 0, 0, "Memory allocation failed\n");
} else {
__xmlRaiseError(NULL, NULL, NULL, NULL, node, domain,
code, XML_ERR_ERROR, NULL, 0, extra,
NULL, NULL, 0, 0, msg, extra);
}
}
/**
* 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, ...)
{
xmlReportError(ctx, NULL);
}
/**
* 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, ...)
{
xmlReportError(ctx, NULL);
}
/**
* 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, ...)
{
xmlReportError(ctx, NULL);
}
/**
* 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, ...)
{
xmlReportError(ctx, NULL);
}
/************************************************************************
* *
* 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));
}
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