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d6d7f7bf96
a reconfigurable routine. The changes are: * xmlerror.h : added the export of an error context type (void *) an error handler type xmlGenericErrorFunc there is an interface xmlSetGenericErrorFunc(void *ctx, xmlGenericErrorFunc handler); to reset the error handling routine and its argument (by default it's equivalent to respectively fprintf and stderr. * all the c files: all wild accesses to stderr or stdout within the library have been replaced to calls to the handler. Daniel
298 lines
7.5 KiB
C
298 lines
7.5 KiB
C
/*
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* error.c: module displaying/handling XML parser errors
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*
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* See Copyright for the status of this software.
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*
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* Daniel Veillard <Daniel.Veillard@w3.org>
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*/
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#ifdef WIN32
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#include "win32config.h"
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#else
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <stdarg.h>
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#include <libxml/parser.h>
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#include <libxml/xmlerror.h>
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/************************************************************************
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* *
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* Handling of out of context errors *
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* *
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************************************************************************/
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/**
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* xmlGenericErrorDefaultFunc:
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* @ctx: an error context
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* @msg: the message to display/transmit
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* @...: extra parameters for the message display
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*
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* Default handler for out of context error messages.
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*/
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void
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xmlGenericErrorDefaultFunc(void *ctx, const char *msg, ...) {
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va_list args;
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if (xmlGenericErrorContext == NULL)
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xmlGenericErrorContext = (void *) stderr;
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va_start(args, msg);
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vfprintf((FILE *)xmlGenericErrorContext, msg, args);
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va_end(args);
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}
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xmlGenericErrorFunc xmlGenericError = xmlGenericErrorDefaultFunc;
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void *xmlGenericErrorContext = NULL;
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/**
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* xmlSetGenericErrorFunc:
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* @ctx: the new error handling context
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* @handler: the new handler function
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*
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* Function to reset the handler and the error context for out of
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* context error messages.
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* This simply means that @handler will be called for subsequent
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* error messages while not parsing nor validating. And @ctx will
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* be passed as first argument to @handler
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* One can simply force messages to be emitted to another FILE * than
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* stderr by setting @ctx to this file handle and @handler to NULL.
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*/
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void
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xmlSetGenericErrorFunc(void *ctx, xmlGenericErrorFunc handler) {
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if (ctx != NULL)
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xmlGenericErrorContext = ctx;
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if (handler != NULL)
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xmlGenericError = handler;
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}
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/************************************************************************
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* *
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* Handling of parsing errors *
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* *
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************************************************************************/
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/**
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* xmlParserPrintFileInfo:
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* @input: an xmlParserInputPtr input
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*
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* Displays the associated file and line informations for the current input
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*/
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void
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xmlParserPrintFileInfo(xmlParserInputPtr input) {
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if (input != NULL) {
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if (input->filename)
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xmlGenericError(xmlGenericErrorContext,
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"%s:%d: ", input->filename,
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input->line);
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else
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xmlGenericError(xmlGenericErrorContext,
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"Entity: line %d: ", input->line);
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}
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}
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/**
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* xmlParserPrintFileContext:
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* @input: an xmlParserInputPtr input
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*
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* Displays current context within the input content for error tracking
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*/
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void
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xmlParserPrintFileContext(xmlParserInputPtr input) {
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const xmlChar *cur, *base;
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int n;
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if (input == NULL) return;
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cur = input->cur;
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base = input->base;
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while ((cur > base) && ((*cur == '\n') || (*cur == '\r'))) {
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cur--;
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}
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n = 0;
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while ((n++ < 80) && (cur > base) && (*cur != '\n') && (*cur != '\r'))
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cur--;
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if ((*cur == '\n') || (*cur == '\r')) cur++;
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base = cur;
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n = 0;
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while ((*cur != 0) && (*cur != '\n') && (*cur != '\r') && (n < 79)) {
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xmlGenericError(xmlGenericErrorContext,
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"%c", (unsigned char) *cur++);
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n++;
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}
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xmlGenericError(xmlGenericErrorContext, "\n");
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cur = input->cur;
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while ((*cur == '\n') || (*cur == '\r'))
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cur--;
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n = 0;
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while ((cur != base) && (n++ < 80)) {
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xmlGenericError(xmlGenericErrorContext, " ");
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base++;
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}
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xmlGenericError(xmlGenericErrorContext,"^\n");
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}
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/**
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* xmlParserError:
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* @ctx: an XML parser context
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* @msg: the message to display/transmit
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* @...: extra parameters for the message display
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*
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* Display and format an error messages, gives file, line, position and
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* extra parameters.
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*/
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void
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xmlParserError(void *ctx, const char *msg, ...)
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{
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xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
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xmlParserInputPtr input = NULL;
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xmlParserInputPtr cur = NULL;
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va_list args;
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if (ctxt != NULL) {
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input = ctxt->input;
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if ((input != NULL) && (input->filename == NULL) &&
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(ctxt->inputNr > 1)) {
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cur = input;
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input = ctxt->inputTab[ctxt->inputNr - 2];
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}
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xmlParserPrintFileInfo(input);
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}
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xmlGenericError(xmlGenericErrorContext, "error: ");
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va_start(args, msg);
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vfprintf(xmlGenericErrorContext, msg, args);
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va_end(args);
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if (ctxt != NULL) {
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xmlParserPrintFileContext(input);
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if (cur != NULL) {
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xmlParserPrintFileInfo(cur);
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xmlGenericError(xmlGenericErrorContext, "\n");
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xmlParserPrintFileContext(cur);
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}
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}
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}
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/**
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* xmlParserWarning:
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* @ctx: an XML parser context
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* @msg: the message to display/transmit
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* @...: extra parameters for the message display
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*
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* Display and format a warning messages, gives file, line, position and
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* extra parameters.
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*/
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void
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xmlParserWarning(void *ctx, const char *msg, ...)
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{
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xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
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xmlParserInputPtr input = NULL;
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xmlParserInputPtr cur = NULL;
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va_list args;
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if (ctxt != NULL) {
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input = ctxt->input;
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if ((input != NULL) && (input->filename == NULL) &&
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(ctxt->inputNr > 1)) {
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cur = input;
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input = ctxt->inputTab[ctxt->inputNr - 2];
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}
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xmlParserPrintFileInfo(input);
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}
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xmlGenericError(xmlGenericErrorContext, "warning: ");
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va_start(args, msg);
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vfprintf(xmlGenericErrorContext, msg, args);
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va_end(args);
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if (ctxt != NULL) {
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xmlParserPrintFileContext(input);
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if (cur != NULL) {
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xmlParserPrintFileInfo(cur);
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xmlGenericError(xmlGenericErrorContext, "\n");
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xmlParserPrintFileContext(cur);
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}
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}
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}
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/************************************************************************
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* *
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* Handling of validation errors *
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* *
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************************************************************************/
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/**
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* xmlParserValidityError:
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* @ctx: an XML parser context
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* @msg: the message to display/transmit
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* @...: extra parameters for the message display
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*
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* Display and format an validity error messages, gives file,
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* line, position and extra parameters.
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*/
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void
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xmlParserValidityError(void *ctx, const char *msg, ...)
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{
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xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
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xmlParserInputPtr input = NULL;
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va_list args;
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if (ctxt != NULL) {
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input = ctxt->input;
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if ((input->filename == NULL) && (ctxt->inputNr > 1))
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input = ctxt->inputTab[ctxt->inputNr - 2];
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xmlParserPrintFileInfo(input);
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}
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xmlGenericError(xmlGenericErrorContext, "validity error: ");
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va_start(args, msg);
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vfprintf(xmlGenericErrorContext, msg, args);
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va_end(args);
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if (ctxt != NULL) {
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xmlParserPrintFileContext(input);
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}
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}
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/**
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* xmlParserValidityWarning:
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* @ctx: an XML parser context
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* @msg: the message to display/transmit
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* @...: extra parameters for the message display
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*
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* Display and format a validity warning messages, gives file, line,
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* position and extra parameters.
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*/
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void
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xmlParserValidityWarning(void *ctx, const char *msg, ...)
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{
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xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
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xmlParserInputPtr input = NULL;
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va_list args;
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if (ctxt != NULL) {
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input = ctxt->input;
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if ((input->filename == NULL) && (ctxt->inputNr > 1))
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input = ctxt->inputTab[ctxt->inputNr - 2];
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xmlParserPrintFileInfo(input);
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}
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xmlGenericError(xmlGenericErrorContext, "validity warning: ");
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va_start(args, msg);
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vfprintf(xmlGenericErrorContext, msg, args);
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va_end(args);
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if (ctxt != NULL) {
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xmlParserPrintFileContext(input);
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}
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}
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