Initial revision
--HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401
This commit is contained in:
Sam Lantinga
commit
2f110628a7
892 changed files with 170313 additions and 0 deletions
340
src/SDL_error.c
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340
src/SDL_error.c
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/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Sam Lantinga
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slouken@devolution.com
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*/
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#ifdef SAVE_RCSID
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static char rcsid =
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"@(#) $Id$";
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#endif
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/* Simple error handling in SDL */
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include "SDL_types.h"
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#include "SDL_getenv.h"
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#include "SDL_error.h"
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#include "SDL_error_c.h"
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#ifndef DISABLE_THREADS
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#include "SDL_thread_c.h"
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#endif
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#ifdef DISABLE_THREADS
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/* The default (non-thread-safe) global error variable */
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static SDL_error SDL_global_error;
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#define SDL_GetErrBuf() (&SDL_global_error)
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#endif /* DISABLE_THREADS */
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#define SDL_ERRBUFIZE 1024
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/* Private functions */
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static void SDL_LookupString(const Uint8 *key, Uint16 *buf, int buflen)
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{
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/* FIXME: Add code to lookup key in language string hash-table */
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/* Key not found in language string hash-table */
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while ( *key && (--buflen > 0) ) {
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*buf++ = *key++;
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}
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*buf = 0; /* NULL terminate string */
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}
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/* Public functions */
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void SDL_SetError (const char *fmt, ...)
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{
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va_list ap;
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SDL_error *error;
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/* Copy in the key, mark error as valid */
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error = SDL_GetErrBuf();
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error->error = 1;
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strncpy((char *)error->key, fmt, sizeof(error->key));
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error->key[sizeof(error->key)-1] = '\0';
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va_start(ap, fmt);
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error->argc = 0;
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while ( *fmt ) {
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if ( *fmt++ == '%' ) {
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switch (*fmt++) {
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case 0: /* Malformed format string.. */
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--fmt;
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break;
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#if 0 /* What is a character anyway? (UNICODE issues) */
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case 'c':
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error->args[error->argc++].value_c =
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va_arg(ap, unsigned char);
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break;
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#endif
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case 'd':
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error->args[error->argc++].value_i =
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va_arg(ap, int);
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break;
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case 'f':
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error->args[error->argc++].value_f =
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va_arg(ap, double);
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break;
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case 'p':
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error->args[error->argc++].value_ptr =
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va_arg(ap, void *);
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break;
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case 's':
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{
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int index = error->argc;
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strncpy((char *)error->args[index].buf,
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va_arg(ap, char *), ERR_MAX_STRLEN);
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error->args[index].buf[ERR_MAX_STRLEN-1] = 0;
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error->argc++;
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}
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break;
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default:
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break;
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}
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if ( error->argc >= ERR_MAX_ARGS ) {
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break;
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}
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}
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}
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va_end(ap);
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/* If we are in debug mode, print out an error message */
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#ifdef DEBUG_ERROR
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fprintf(stderr, "SDL_SetError: %s\n", SDL_GetError());
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#else
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if ( getenv("SDL_DEBUG") ) {
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fprintf(stderr, "SDL_SetError: %s\n", SDL_GetError());
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}
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#endif
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}
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/* Print out an integer value to a UNICODE buffer */
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static int PrintInt(Uint16 *str, unsigned int maxlen, int value)
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{
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char tmp[128];
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int len, i;
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sprintf(tmp, "%d", value);
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len = 0;
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if ( strlen(tmp) < maxlen ) {
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for ( i=0; tmp[i]; ++i ) {
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*str++ = tmp[i];
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++len;
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}
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}
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return(len);
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}
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/* Print out a double value to a UNICODE buffer */
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static int PrintDouble(Uint16 *str, unsigned int maxlen, double value)
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{
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char tmp[128];
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int len, i;
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sprintf(tmp, "%f", value);
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len = 0;
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if ( strlen(tmp) < maxlen ) {
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for ( i=0; tmp[i]; ++i ) {
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*str++ = tmp[i];
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++len;
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}
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}
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return(len);
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}
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/* Print out a pointer value to a UNICODE buffer */
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static int PrintPointer(Uint16 *str, unsigned int maxlen, void *value)
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{
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char tmp[128];
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int len, i;
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sprintf(tmp, "%p", value);
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len = 0;
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if ( strlen(tmp) < maxlen ) {
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for ( i=0; tmp[i]; ++i ) {
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*str++ = tmp[i];
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++len;
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}
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}
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return(len);
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}
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/* This function has a bit more overhead than most error functions
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so that it supports internationalization and thread-safe errors.
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*/
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Uint16 *SDL_GetErrorMsgUNICODE(Uint16 *errstr, unsigned int maxlen)
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{
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SDL_error *error;
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/* Clear the error string */
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*errstr = 0; --maxlen;
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/* Get the thread-safe error, and print it out */
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error = SDL_GetErrBuf();
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if ( error->error ) {
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Uint16 translated[ERR_MAX_STRLEN], *fmt, *msg;
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int len;
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int argi;
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/* Print out the UNICODE error message */
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SDL_LookupString(error->key, translated, sizeof(translated));
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msg = errstr;
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argi = 0;
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for ( fmt=translated; *fmt && (maxlen > 0); ) {
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if ( *fmt == '%' ) {
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switch (fmt[1]) {
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case 'S': /* Special SKIP operand */
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argi += (fmt[2] - '0');
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++fmt;
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break;
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case '%':
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*msg++ = '%';
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maxlen -= 1;
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break;
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#if 0 /* What is a character anyway? (UNICODE issues) */
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case 'c':
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*msg++ = (unsigned char)
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error->args[argi++].value_c;
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maxlen -= 1;
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break;
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#endif
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case 'd':
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len = PrintInt(msg, maxlen,
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error->args[argi++].value_i);
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msg += len;
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maxlen -= len;
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break;
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case 'f':
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len = PrintDouble(msg, maxlen,
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error->args[argi++].value_f);
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msg += len;
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maxlen -= len;
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break;
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case 'p':
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len = PrintPointer(msg, maxlen,
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error->args[argi++].value_ptr);
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msg += len;
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maxlen -= len;
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break;
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case 's': /* UNICODE string */
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{ Uint16 buf[ERR_MAX_STRLEN], *str;
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SDL_LookupString(error->args[argi++].buf, buf, sizeof(buf));
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str = buf;
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while ( *str && (maxlen > 0) ) {
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*msg++ = *str++;
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maxlen -= 1;
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}
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}
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break;
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}
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fmt += 2;
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} else {
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*msg++ = *fmt++;
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maxlen -= 1;
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}
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}
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*msg = 0; /* NULL terminate the string */
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}
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return(errstr);
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}
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Uint8 *SDL_GetErrorMsg(Uint8 *errstr, unsigned int maxlen)
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{
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Uint16 *errstr16;
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unsigned int i;
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/* Allocate the UNICODE buffer */
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errstr16 = (Uint16 *)malloc(maxlen * (sizeof *errstr16));
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if ( ! errstr16 ) {
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strncpy((char *)errstr, "Out of memory", maxlen);
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errstr[maxlen-1] = '\0';
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return(errstr);
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}
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/* Get the error message */
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SDL_GetErrorMsgUNICODE(errstr16, maxlen);
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/* Convert from UNICODE to Latin1 encoding */
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for ( i=0; i<maxlen; ++i ) {
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errstr[i] = (Uint8)errstr16[i];
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}
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/* Free UNICODE buffer (if necessary) */
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free(errstr16);
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return(errstr);
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}
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/* Available for backwards compatibility */
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char *SDL_GetError (void)
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{
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static char errmsg[SDL_ERRBUFIZE];
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return((char *)SDL_GetErrorMsg((unsigned char *)errmsg, SDL_ERRBUFIZE));
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}
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void SDL_ClearError(void)
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{
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SDL_error *error;
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error = SDL_GetErrBuf();
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error->error = 0;
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}
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/* Very common errors go here */
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void SDL_Error(SDL_errorcode code)
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{
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switch (code) {
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case SDL_ENOMEM:
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SDL_SetError("Out of memory");
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break;
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case SDL_EFREAD:
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SDL_SetError("Error reading from datastream");
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break;
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case SDL_EFWRITE:
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SDL_SetError("Error writing to datastream");
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break;
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case SDL_EFSEEK:
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SDL_SetError("Error seeking in datastream");
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break;
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default:
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SDL_SetError("Unknown SDL error");
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break;
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}
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}
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#ifdef TEST_ERROR
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int main(int argc, char *argv[])
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{
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char buffer[BUFSIZ+1];
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SDL_SetError("Hi there!");
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printf("Error 1: %s\n", SDL_GetError());
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SDL_ClearError();
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memset(buffer, '1', BUFSIZ);
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buffer[BUFSIZ] = 0;
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SDL_SetError("This is the error: %s (%f)", buffer, 1.0);
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printf("Error 2: %s\n", SDL_GetError());
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exit(0);
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}
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#endif
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