src/error.h

   1 /*--- error.h ------------------------------------------------------------------
   2 Copyright (C) 2004, 2005, 2006 Sylvain Fourmanoit <syfou@users.sourceforge.net>
   3
   4 Permission is hereby granted, free of charge, to any person obtaining a copy
   5 of this software and associated documentation files (the "Software"), to
   6 deal in the Software without restriction, including without limitation the
   7 rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   8 sell copies of the Software, and to permit persons to whom the Software is
   9 furnished to do so, subject to the following conditions:
  10
  11 The above copyright notice and this permission notice shall be included in
  12 all copies of the Software and its documentation and acknowledgment shall be
  13 given in the documentation and software packages that this Software was
  14 used.
  15
  16 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19 THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  20 IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22 ------------------------------------------------------------------------------*/
  23 /* Wrapper around system error functions                                      */
  24
  25 /*----------------------------------------------------------------------------*/
  26 #ifndef HAVE_ERROR_H
  27 #define HAVE_ERROR_H
  28
  29 #ifndef HAVE_CONFIG_H
  30 #error Autogenerated config.h should be used.
  31 #endif
  32
  33 /*----------------------------------------------------------------------------*/
  34 #include "config.h"                     /* Autoconf header */
  35
  36 #ifdef HAVE_ERRNO_H
  37 #include <errno.h>                      /* C includes */
  38 #endif
  39
  40 /*----------------------------------------------------------------------------*/
  41 extern int errno_bis;
  42
  43 /*----------------------------------------------------------------------------*/
  44 /* Error related management
  45  */
  46 #define TRY_CATCH(x)\
  47 do {\
  48   errno=0;\
  49   do { x; } while(0);\
  50   if(errno) { errno_bis=errno; return 0;}\
  51 } while(0)
  52
  53 /* Whenever TRY is going to be used in a function,
  54    TRY_RESET should be invoked before. */
  55 #define TRY(x)\
  56 do {\
  57    errno=0;\
  58    do { x; } while(0);\
  59    if(errno) errno_bis=errno;\
  60 } while(0)
  61
  62 #define TRY_SUCCESS (errno_bis==0)
  63 #define TRY_RESET errno_bis=0
  64
  65 /*----------------------------------------------------------------------------*/
  66 /* Debugging related.
  67    I know, I know, variadic macros are ISO99 C, not ANSI...
  68  */
  69 #ifdef DEBUG
  70 #ifdef HAVE_STDIO_H
  71 #include <stdio.h>
  72 #endif
  73 #ifdef HAVE_STDARG_H
  74 #include <stdarg.h>
  75 #endif
  76 #ifdef HAVE_STDLIB_H
  77 #include <stdlib.h>
  78 #endif
  79 #ifdef HAVE_SYS_TYPES_H
  80 #include <sys/types.h>
  81 #endif
  82 #ifdef HAVE_UNISTD_H
  83 #include <unistd.h>
  84 #endif
  85 void debug_init(void);
  86 int debug(const char *, ...);
  87 int vdebug(const char *, va_list);
  88 int debug_on_stderr(void);
  89 #else
  90 #define debug( ... )
  91 #endif
  92
  93 /* Now, make sure we have strerror() defined
  94  */
  95 #ifdef HAVE_STRING_H
  96 #include <string.h>
  97 #else
  98 #ifdef HAVE_ERRNO_H
  99 #define strerror(errnum) sys_errlist[errnum]
 100 #else
 101 #define strerror(errnum) NULL
 102 #endif
 103 #endif
 104
 105 /*----------------------------------------------------------------------------*/
 106 #endif