Mercurial > sdl-ios-xcode
view src/SDL_error.c @ 4283:cd511a8560b7 SDL-1.2
Ozkan Sezer 2009-04-01 23:17:13 PDT
This change should be applied to the 1.2 branch, too, because the svn version
SDL_net requires it.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Thu, 08 Oct 2009 07:45:55 +0000 |
parents | a1b03ba2fcd0 |
children |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2009 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" /* Simple error handling in SDL */ #include "SDL_error.h" #include "SDL_error_c.h" /* Routine to get the thread-specific error variable */ #if SDL_THREADS_DISABLED /* The SDL_arraysize(The ),default (non-thread-safe) global error variable */ static SDL_error SDL_global_error; #define SDL_GetErrBuf() (&SDL_global_error) #else extern SDL_error *SDL_GetErrBuf(void); #endif /* SDL_THREADS_DISABLED */ #define SDL_ERRBUFIZE 1024 /* Private functions */ static const char *SDL_LookupString(const char *key) { /* FIXME: Add code to lookup key in language string hash-table */ return key; } /* Public functions */ void SDL_SetError (const char *fmt, ...) { va_list ap; SDL_error *error; /* Copy in the key, mark error as valid */ error = SDL_GetErrBuf(); error->error = 1; SDL_strlcpy((char *)error->key, fmt, sizeof(error->key)); va_start(ap, fmt); error->argc = 0; while ( *fmt ) { if ( *fmt++ == '%' ) { while ( *fmt == '.' || (*fmt >= '0' && *fmt <= '9') ) { ++fmt; } switch (*fmt++) { case 0: /* Malformed format string.. */ --fmt; break; case 'c': case 'i': case 'd': case 'u': case 'o': case 'x': case 'X': error->args[error->argc++].value_i = va_arg(ap, int); break; case 'f': error->args[error->argc++].value_f = va_arg(ap, double); break; case 'p': error->args[error->argc++].value_ptr = va_arg(ap, void *); break; case 's': { int i = error->argc; const char *str = va_arg(ap, const char *); if (str == NULL) str = "(null)"; SDL_strlcpy((char *)error->args[i].buf, str, ERR_MAX_STRLEN); error->argc++; } break; default: break; } if ( error->argc >= ERR_MAX_ARGS ) { break; } } } va_end(ap); /* If we are in debug mode, print out an error message */ #ifdef DEBUG_ERROR fprintf(stderr, "SDL_SetError: %s\n", SDL_GetError()); #endif } /* This function has a bit more overhead than most error functions so that it supports internationalization and thread-safe errors. */ char *SDL_GetErrorMsg(char *errstr, unsigned int maxlen) { SDL_error *error; /* Clear the error string */ *errstr = '\0'; --maxlen; /* Get the thread-safe error, and print it out */ error = SDL_GetErrBuf(); if ( error->error ) { const char *fmt; char *msg = errstr; int len; int argi; fmt = SDL_LookupString(error->key); argi = 0; while ( *fmt && (maxlen > 0) ) { if ( *fmt == '%' ) { char tmp[32], *spot = tmp; *spot++ = *fmt++; while ( (*fmt == '.' || (*fmt >= '0' && *fmt <= '9')) && spot < (tmp+SDL_arraysize(tmp)-2) ) { *spot++ = *fmt++; } *spot++ = *fmt++; *spot++ = '\0'; switch (spot[-2]) { case '%': *msg++ = '%'; maxlen -= 1; break; case 'c': case 'i': case 'd': case 'u': case 'o': case 'x': case 'X': len = SDL_snprintf(msg, maxlen, tmp, error->args[argi++].value_i); msg += len; maxlen -= len; break; case 'f': len = SDL_snprintf(msg, maxlen, tmp, error->args[argi++].value_f); msg += len; maxlen -= len; break; case 'p': len = SDL_snprintf(msg, maxlen, tmp, error->args[argi++].value_ptr); msg += len; maxlen -= len; break; case 's': len = SDL_snprintf(msg, maxlen, tmp, SDL_LookupString(error->args[argi++].buf)); msg += len; maxlen -= len; break; } } else { *msg++ = *fmt++; maxlen -= 1; } } *msg = 0; /* NULL terminate the string */ } return(errstr); } /* Available for backwards compatibility */ char *SDL_GetError (void) { static char errmsg[SDL_ERRBUFIZE]; return((char *)SDL_GetErrorMsg(errmsg, SDL_ERRBUFIZE)); } void SDL_ClearError(void) { SDL_error *error; error = SDL_GetErrBuf(); error->error = 0; } /* Very common errors go here */ void SDL_Error(SDL_errorcode code) { switch (code) { case SDL_ENOMEM: SDL_SetError("Out of memory"); break; case SDL_EFREAD: SDL_SetError("Error reading from datastream"); break; case SDL_EFWRITE: SDL_SetError("Error writing to datastream"); break; case SDL_EFSEEK: SDL_SetError("Error seeking in datastream"); break; default: SDL_SetError("Unknown SDL error"); break; } } #ifdef TEST_ERROR int main(int argc, char *argv[]) { char buffer[BUFSIZ+1]; SDL_SetError("Hi there!"); printf("Error 1: %s\n", SDL_GetError()); SDL_ClearError(); SDL_memset(buffer, '1', BUFSIZ); buffer[BUFSIZ] = 0; SDL_SetError("This is the error: %s (%f)", buffer, 1.0); printf("Error 2: %s\n", SDL_GetError()); exit(0); } #endif