src/error.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #include <libsigrok/libsigrok.h>
  22
  23 /**
  24  * @file
  25  *
  26  * Error handling in libsigrok.
  27  */
  28
  29 /**
  30  * @defgroup grp_error Error handling
  31  *
  32  * Error handling in libsigrok.
  33  *
  34  * libsigrok functions usually return @ref SR_OK upon success, or a negative
  35  * error code on failure.
  36  *
  37  * @{
  38  */
  39
  40 /**
  41  * Return a human-readable error string for the given libsigrok error code.
  42  *
  43  * @param error_code A libsigrok error code number, such as SR_ERR_MALLOC.
  44  *
  45  * @return A const string containing a short, human-readable (English)
  46  *         description of the error, such as "memory allocation error".
  47  *         The string must NOT be free'd by the caller!
  48  *
  49  * @see sr_strerror_name
  50  *
  51  * @since 0.2.0
  52  */
  53 SR_API const char *sr_strerror(int error_code)
  54 {
  55         /*
  56          * Note: All defined SR_* error macros from libsigrok.h must have
  57          * an entry in this function, as well as in sr_strerror_name().
  58          */
  59
  60         switch (error_code) {
  61         case SR_OK:
  62                 return "no error";
  63         case SR_ERR:
  64                 return "generic/unspecified error";
  65         case SR_ERR_MALLOC:
  66                 return "memory allocation error";
  67         case SR_ERR_ARG:
  68                 return "invalid argument";
  69         case SR_ERR_BUG:
  70                 return "internal error";
  71         case SR_ERR_SAMPLERATE:
  72                 return "invalid samplerate";
  73         case SR_ERR_NA:
  74                 return "not applicable";
  75         case SR_ERR_DEV_CLOSED:
  76                 return "device closed but should be open";
  77         case SR_ERR_TIMEOUT:
  78                 return "timeout occurred";
  79         case SR_ERR_CHANNEL_GROUP:
  80                 return "no channel group specified";
  81         case SR_ERR_DATA:
  82                 return "data is invalid";
  83         case SR_ERR_IO:
  84                 return "input/output error";
  85         default:
  86                 return "unknown error";
  87         }
  88 }
  89
  90 /**
  91  * Return the "name" string of the given libsigrok error code.
  92  *
  93  * For example, the "name" of the SR_ERR_MALLOC error code is "SR_ERR_MALLOC",
  94  * the name of the SR_OK code is "SR_OK", and so on.
  95  *
  96  * This function can be used for various purposes where the "name" string of
  97  * a libsigrok error code is useful.
  98  *
  99  * @param error_code A libsigrok error code number, such as SR_ERR_MALLOC.
 100  *
 101  * @return A const string containing the "name" of the error code as string.
 102  *         The string must NOT be free'd by the caller!
 103  *
 104  * @see sr_strerror
 105  *
 106  * @since 0.2.0
 107  */
 108 SR_API const char *sr_strerror_name(int error_code)
 109 {
 110         /*
 111          * Note: All defined SR_* error macros from libsigrok.h must have
 112          * an entry in this function, as well as in sr_strerror().
 113          */
 114
 115         switch (error_code) {
 116         case SR_OK:
 117                 return "SR_OK";
 118         case SR_ERR:
 119                 return "SR_ERR";
 120         case SR_ERR_MALLOC:
 121                 return "SR_ERR_MALLOC";
 122         case SR_ERR_ARG:
 123                 return "SR_ERR_ARG";
 124         case SR_ERR_BUG:
 125                 return "SR_ERR_BUG";
 126         case SR_ERR_SAMPLERATE:
 127                 return "SR_ERR_SAMPLERATE";
 128         case SR_ERR_NA:
 129                 return "SR_ERR_NA";
 130         case SR_ERR_DEV_CLOSED:
 131                 return "SR_ERR_DEV_CLOSED";
 132         case SR_ERR_TIMEOUT:
 133                 return "SR_ERR_TIMEOUT";
 134         case SR_ERR_CHANNEL_GROUP:
 135                 return "SR_ERR_CHANNEL_GROUP";
 136         case SR_ERR_DATA:
 137                 return "SR_ERR_DATA";
 138         case SR_ERR_IO:
 139                 return "SR_ERR_IO";
 140         default:
 141                 return "unknown error code";
 142         }
 143 }
 144
 145 /** @} */