| /* |
| * 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 <stdarg.h> |
| #include <libxml/parser.h> |
| #include <libxml/xmlerror.h> |
| #include <libxml/xmlmemory.h> |
| #include <libxml/globals.h> |
| |
| void xmlGenericErrorDefaultFunc (void *ctx ATTRIBUTE_UNUSED, |
| const char *msg, |
| ...); |
| |
| #define XML_GET_VAR_STR(msg, str) { \ |
| int size; \ |
| int chars; \ |
| char *larger; \ |
| va_list ap; \ |
| \ |
| str = (char *) xmlMalloc(150); \ |
| if (str == NULL) \ |
| return; \ |
| \ |
| size = 150; \ |
| \ |
| while (1) { \ |
| va_start(ap, msg); \ |
| chars = vsnprintf(str, size, msg, ap); \ |
| va_end(ap); \ |
| if ((chars > -1) && (chars < size)) \ |
| break; \ |
| if (chars > -1) \ |
| size += chars + 1; \ |
| else \ |
| size += 100; \ |
| if ((larger = (char *) xmlRealloc(str, size)) == NULL) {\ |
| xmlFree(str); \ |
| return; \ |
| } \ |
| str = larger; \ |
| } \ |
| } |
| |
| /************************************************************************ |
| * * |
| * 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 |
| * |
| * Set or reset (if NULL) the default handler for generic errors |
| */ |
| void |
| initGenericErrorDefaultFunc(xmlGenericErrorFunc * handler) |
| { |
| if (handler == NULL) |
| xmlGenericError = xmlGenericErrorDefaultFunc; |
| else |
| (*handler) = xmlGenericErrorDefaultFunc; |
| } |
| |
| /** |
| * 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. |
| */ |
| void |
| xmlSetGenericErrorFunc(void *ctx, xmlGenericErrorFunc handler) { |
| xmlGenericErrorContext = ctx; |
| if (handler != NULL) |
| xmlGenericError = handler; |
| else |
| xmlGenericError = xmlGenericErrorDefaultFunc; |
| } |
| |
| /************************************************************************ |
| * * |
| * Handling of parsing errors * |
| * * |
| ************************************************************************/ |
| |
| /** |
| * xmlParserPrintFileInfo: |
| * @input: an xmlParserInputPtr input |
| * |
| * Displays the associated file and line informations 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); |
| } |
| } |
| |
| /** |
| * xmlParserPrintFileContext: |
| * @input: an xmlParserInputPtr input |
| * |
| * Displays current context within the input content for error tracking |
| */ |
| |
| void |
| xmlParserPrintFileContext(xmlParserInputPtr input) { |
| const xmlChar *cur, *base; |
| int n; |
| xmlChar content[81]; |
| xmlChar *ctnt; |
| |
| if (input == 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 maximum 80 characters */ |
| while ((n++ < 80) && (cur > base) && (*cur != '\n') && (*cur != '\r')) |
| cur--; |
| if ((*cur == '\n') || (*cur == '\r')) cur++; |
| /* search forward for end-of-line maximum 80 characters */ |
| n = 0; |
| ctnt = content; |
| while ((*cur != 0) && (*cur != '\n') && (*cur != '\r') && (n < 79)) { |
| *ctnt++ = *cur++; |
| n++; |
| } |
| *ctnt = 0; |
| xmlGenericError(xmlGenericErrorContext,"%s\n", content); |
| /* create blank line with problem pointer */ |
| cur = input->cur; |
| while ((cur > base) && ((*cur == '\n') || (*cur == '\r'))) { |
| cur--; |
| } |
| n = 0; |
| ctnt = content; |
| while ((n++ < 79) && (cur > base) && (*cur != '\n') && (*cur != '\r')) { |
| *ctnt++ = ' '; |
| cur--; |
| } |
| if (ctnt > content) { |
| *(--ctnt) = '^'; |
| *(++ctnt) = 0; |
| } else { |
| *ctnt = '^'; |
| *(++ctnt) = 0; |
| } |
| xmlGenericError(xmlGenericErrorContext,"%s\n", content); |
| } |
| |
| #if 0 |
| /** |
| * xmlGetVarStr: |
| * @msg: the message format |
| * @args: a va_list argument list |
| * |
| * SGS contribution |
| * Get an arbitrary-sized string for an error argument |
| * The caller must free() the returned string |
| */ |
| static char * |
| xmlGetVarStr(const char * msg, va_list args) { |
| int size; |
| int length; |
| int chars, left; |
| char *str, *larger; |
| va_list ap; |
| |
| str = (char *) xmlMalloc(150); |
| if (str == NULL) |
| return(NULL); |
| |
| size = 150; |
| length = 0; |
| |
| while (1) { |
| left = size - length; |
| /* Try to print in the allocated space. */ |
| va_start(msg, ap); |
| chars = vsnprintf(str + length, left, msg, ap); |
| va_end(ap); |
| /* If that worked, we're done. */ |
| if ((chars > -1) && (chars < left )) |
| break; |
| /* Else try again with more space. */ |
| if (chars > -1) /* glibc 2.1 */ |
| size += chars + 1; /* precisely what is needed */ |
| else /* glibc 2.0 */ |
| size += 100; |
| if ((larger = (char *) xmlRealloc(str, size)) == NULL) { |
| xmlFree(str); |
| return(NULL); |
| } |
| str = larger; |
| } |
| return(str); |
| } |
| #endif |
| |
| /** |
| * 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, ...) |
| { |
| xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx; |
| xmlParserInputPtr input = NULL; |
| xmlParserInputPtr cur = NULL; |
| char * str; |
| |
| if (ctxt != NULL) { |
| input = ctxt->input; |
| if ((input != NULL) && (input->filename == NULL) && |
| (ctxt->inputNr > 1)) { |
| cur = input; |
| input = ctxt->inputTab[ctxt->inputNr - 2]; |
| } |
| xmlParserPrintFileInfo(input); |
| } |
| |
| xmlGenericError(xmlGenericErrorContext, "error: "); |
| XML_GET_VAR_STR(msg, str); |
| xmlGenericError(xmlGenericErrorContext, "%s", str); |
| if (str != NULL) |
| xmlFree(str); |
| |
| if (ctxt != NULL) { |
| xmlParserPrintFileContext(input); |
| if (cur != NULL) { |
| xmlParserPrintFileInfo(cur); |
| xmlGenericError(xmlGenericErrorContext, "\n"); |
| xmlParserPrintFileContext(cur); |
| } |
| } |
| } |
| |
| /** |
| * 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, ...) |
| { |
| xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx; |
| xmlParserInputPtr input = NULL; |
| xmlParserInputPtr cur = NULL; |
| char * str; |
| |
| if (ctxt != NULL) { |
| input = ctxt->input; |
| if ((input != NULL) && (input->filename == NULL) && |
| (ctxt->inputNr > 1)) { |
| cur = input; |
| input = ctxt->inputTab[ctxt->inputNr - 2]; |
| } |
| xmlParserPrintFileInfo(input); |
| } |
| |
| xmlGenericError(xmlGenericErrorContext, "warning: "); |
| XML_GET_VAR_STR(msg, str); |
| xmlGenericError(xmlGenericErrorContext, "%s", str); |
| if (str != NULL) |
| xmlFree(str); |
| |
| if (ctxt != NULL) { |
| xmlParserPrintFileContext(input); |
| if (cur != NULL) { |
| xmlParserPrintFileInfo(cur); |
| xmlGenericError(xmlGenericErrorContext, "\n"); |
| xmlParserPrintFileContext(cur); |
| } |
| } |
| } |
| |
| /************************************************************************ |
| * * |
| * Handling of validation errors * |
| * * |
| ************************************************************************/ |
| |
| /** |
| * 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, ...) |
| { |
| xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx; |
| xmlParserInputPtr input = NULL; |
| char * str; |
| int len = xmlStrlen((const xmlChar *) msg); |
| static int had_info = 0; |
| int need_context = 0; |
| int need_info = 0; |
| |
| if ((len > 1) && (msg[len - 2] != ':')) { |
| if (ctxt != NULL) { |
| input = ctxt->input; |
| if ((input->filename == NULL) && (ctxt->inputNr > 1)) |
| input = ctxt->inputTab[ctxt->inputNr - 2]; |
| |
| if (had_info == 0) { |
| xmlParserPrintFileInfo(input); |
| } |
| } |
| xmlGenericError(xmlGenericErrorContext, "validity error: "); |
| need_context = 1; |
| had_info = 0; |
| } else { |
| had_info = 1; |
| } |
| |
| XML_GET_VAR_STR(msg, str); |
| xmlGenericError(xmlGenericErrorContext, "%s", str); |
| if (str != NULL) |
| xmlFree(str); |
| |
| if ((ctxt != NULL) && (input != NULL)) { |
| xmlParserPrintFileContext(input); |
| } |
| } |
| |
| /** |
| * 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, ...) |
| { |
| xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx; |
| xmlParserInputPtr input = NULL; |
| char * str; |
| int len = xmlStrlen((const xmlChar *) msg); |
| |
| if ((ctxt != NULL) && (len != 0) && (msg[len - 1] != ':')) { |
| input = ctxt->input; |
| if ((input->filename == NULL) && (ctxt->inputNr > 1)) |
| input = ctxt->inputTab[ctxt->inputNr - 2]; |
| |
| xmlParserPrintFileInfo(input); |
| } |
| |
| xmlGenericError(xmlGenericErrorContext, "validity warning: "); |
| XML_GET_VAR_STR(msg, str); |
| xmlGenericError(xmlGenericErrorContext, "%s", str); |
| if (str != NULL) |
| xmlFree(str); |
| |
| if (ctxt != NULL) { |
| xmlParserPrintFileContext(input); |
| } |
| } |
| |
| |