src/SDL_error.c
author Sam Lantinga <slouken@libsdl.org>
Mon, 10 Jul 2006 21:04:37 +0000
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parent 1847 845bcffc0dd8
child 2049 5f6550e5184f
permissions -rw-r--r--
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2006 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 Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 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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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* Simple error handling in SDL */
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#include "SDL_error.h"
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#include "SDL_error_c.h"
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/* Routine to get the thread-specific error variable */
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#if SDL_THREADS_DISABLED
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/* The  SDL_arraysize(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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#else
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extern SDL_error *SDL_GetErrBuf(void);
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#endif /* SDL_THREADS_DISABLED */
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#define SDL_ERRBUFIZE	1024
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/* Private functions */
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static const char *
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SDL_LookupString(const char *key)
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{
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    /* FIXME: Add code to lookup key in language string hash-table */
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    return key;
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}
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/* Public functions */
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void
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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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    SDL_strlcpy((char *) error->key, fmt, sizeof(error->key));
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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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            while (*fmt == '.' || (*fmt >= '0' && *fmt <= '9')) {
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                ++fmt;
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            }
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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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            case 'c':
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            case 'i':
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            case 'd':
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            case 'u':
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            case 'o':
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            case 'x':
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            case 'X':
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                error->args[error->argc++].value_i = 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 = 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 = va_arg(ap, void *);
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                break;
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            case 's':
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                {
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                    int i = error->argc;
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                    const char *str = va_arg(ap, const char *);
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                    if (str == NULL)
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                        str = "(null)";
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                    SDL_strlcpy((char *) error->args[i].buf, str,
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                                ERR_MAX_STRLEN);
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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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#endif
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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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char *
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SDL_GetErrorMsg(char *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';
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    --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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   129
    if (error->error) {
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        const char *fmt;
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   131
        char *msg = errstr;
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        int len;
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   133
        int argi;
0
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   134
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        fmt = SDL_LookupString(error->key);
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   136
        argi = 0;
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   137
        while (*fmt && (maxlen > 0)) {
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   138
            if (*fmt == '%') {
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   139
                char tmp[32], *spot = tmp;
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   140
                *spot++ = *fmt++;
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   141
                while ((*fmt == '.' || (*fmt >= '0' && *fmt <= '9'))
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   142
                       && spot < (tmp + SDL_arraysize(tmp) - 2)) {
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   143
                    *spot++ = *fmt++;
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   144
                }
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   145
                *spot++ = *fmt++;
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   146
                *spot++ = '\0';
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   147
                switch (spot[-2]) {
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   148
                case '%':
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   149
                    *msg++ = '%';
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   150
                    maxlen -= 1;
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   151
                    break;
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   152
                case 'c':
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   153
                case 'i':
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   154
                case 'd':
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   155
                case 'u':
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   156
                case 'o':
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   157
                case 'x':
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   158
                case 'X':
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   159
                    len =
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   160
                        SDL_snprintf(msg, maxlen, tmp,
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   161
                                     error->args[argi++].value_i);
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   162
                    msg += len;
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   163
                    maxlen -= len;
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   164
                    break;
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   165
                case 'f':
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   166
                    len =
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   167
                        SDL_snprintf(msg, maxlen, tmp,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   168
                                     error->args[argi++].value_f);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   169
                    msg += len;
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   170
                    maxlen -= len;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   171
                    break;
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   172
                case 'p':
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   173
                    len =
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   174
                        SDL_snprintf(msg, maxlen, tmp,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   175
                                     error->args[argi++].value_ptr);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   176
                    msg += len;
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   177
                    maxlen -= len;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   178
                    break;
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   179
                case 's':
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   180
                    len =
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   181
                        SDL_snprintf(msg, maxlen, tmp,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   182
                                     SDL_LookupString(error->
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   183
                                                      args[argi++].buf));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   184
                    msg += len;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   185
                    maxlen -= len;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   186
                    break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   187
                }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   188
            } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   189
                *msg++ = *fmt++;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   190
                maxlen -= 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   191
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   192
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   193
        *msg = 0;               /* NULL terminate the string */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   194
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   195
    return (errstr);
0
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diff changeset
   196
}
74212992fb08 Initial revision
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   197
74212992fb08 Initial revision
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   198
/* Available for backwards compatibility */
1895
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   199
char *
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   200
SDL_GetError(void)
0
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diff changeset
   201
{
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   202
    static char errmsg[SDL_ERRBUFIZE];
0
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diff changeset
   203
1895
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   204
    return ((char *) SDL_GetErrorMsg(errmsg, SDL_ERRBUFIZE));
0
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   205
}
74212992fb08 Initial revision
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diff changeset
   206
1895
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   207
void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   208
SDL_ClearError(void)
0
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diff changeset
   209
{
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   210
    SDL_error *error;
0
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diff changeset
   211
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   212
    error = SDL_GetErrBuf();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   213
    error->error = 0;
0
74212992fb08 Initial revision
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diff changeset
   214
}
74212992fb08 Initial revision
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parents:
diff changeset
   215
74212992fb08 Initial revision
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diff changeset
   216
/* Very common errors go here */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   217
void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   218
SDL_Error(SDL_errorcode code)
0
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parents:
diff changeset
   219
{
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   220
    switch (code) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   221
    case SDL_ENOMEM:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1847
diff changeset
   222
        SDL_SetError("Out of memory");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   223
        break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1847
diff changeset
   224
    case SDL_EFREAD:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   225
        SDL_SetError("Error reading from datastream");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1847
diff changeset
   226
        break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1847
diff changeset
   227
    case SDL_EFWRITE:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1847
diff changeset
   228
        SDL_SetError("Error writing to datastream");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1847
diff changeset
   229
        break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1847
diff changeset
   230
    case SDL_EFSEEK:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1847
diff changeset
   231
        SDL_SetError("Error seeking in datastream");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1847
diff changeset
   232
        break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1847
diff changeset
   233
    default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1847
diff changeset
   234
        SDL_SetError("Unknown SDL error");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1847
diff changeset
   235
        break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1847
diff changeset
   236
    }
0
74212992fb08 Initial revision
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parents:
diff changeset
   237
}
74212992fb08 Initial revision
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parents:
diff changeset
   238
74212992fb08 Initial revision
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diff changeset
   239
#ifdef TEST_ERROR
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   240
int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   241
main(int argc, char *argv[])
0
74212992fb08 Initial revision
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diff changeset
   242
{
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   243
    char buffer[BUFSIZ + 1];
0
74212992fb08 Initial revision
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diff changeset
   244
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
   245
    SDL_SetError("Hi there!");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1847
diff changeset
   246
    printf("Error 1: %s\n", SDL_GetError());
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1847
diff changeset
   247
    SDL_ClearError();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1847
diff changeset
   248
    SDL_memset(buffer, '1', BUFSIZ);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1847
diff changeset
   249
    buffer[BUFSIZ] = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1847
diff changeset
   250
    SDL_SetError("This is the error: %s (%f)", buffer, 1.0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1847
diff changeset
   251
    printf("Error 2: %s\n", SDL_GetError());
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   252
    exit(0);
0
74212992fb08 Initial revision
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diff changeset
   253
}
74212992fb08 Initial revision
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diff changeset
   254
#endif
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1847
diff changeset
   255
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