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1 /* |
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2 * err.h -- formtted error messages (portable version) |
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3 * |
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4 * Copyright (c) 2011, 2012, David Demelier <markand@malikania.fr> |
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5 * |
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6 * Permission to use, copy, modify, and/or distribute this software for any |
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7 * purpose with or without fee is hereby granted, provided that the above |
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8 * copyright notice and this permission notice appear in all copies. |
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9 * |
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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17 */ |
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18 |
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19 #ifndef _ERR_H_ |
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20 #define _ERR_H_ |
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21 |
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22 #include <stdarg.h> |
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23 |
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24 #ifdef __cplusplus |
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25 extern "C" { |
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26 #endif |
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27 |
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28 /* |
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29 * Attribute noreturn may helps. This may produce a warning with GCC 4.5: |
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30 * |
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31 * int a; |
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32 * |
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33 * if ((a = getstate() < 0) |
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34 * errx(1, "State failed"); |
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35 * |
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36 * Because compilator does not know that errx will call exit may produce |
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37 * a warning like `a may be used uninitialized'. |
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38 */ |
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39 |
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40 #if defined(__GNUC__) |
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41 # define __at_noreturn __attribute__ ((noreturn)) |
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42 #elif defined(_MSC_VER) |
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43 # define __at_noreturn __declspec(noreturn) |
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44 #endif |
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45 |
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46 /* |
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47 * err() functions append the format message to the stderr FILE pointer. They |
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48 * also append the system error using strerror(errno). Then the functions exit |
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49 * with the error code given as first argument. |
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50 */ |
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51 |
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52 void err(int, const char *, ...) __at_noreturn; |
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53 void verr(int, const char *, va_list) __at_noreturn; |
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54 |
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55 /* |
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56 * errx() functions are similar to err() except that they do not append the |
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57 * system error message. |
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58 */ |
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59 |
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60 void errx(int, const char *, ...) __at_noreturn; |
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61 void verrx(int, const char *, va_list) __at_noreturn; |
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62 |
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63 /* |
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64 * warn() functions are similar to err() but they do not call exit(). |
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65 */ |
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66 |
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67 void warn(const char *, ...); |
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68 void vwarn(const char *, va_list); |
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69 |
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70 /* |
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71 * warnx() functions are similar to warn() except that they do not append the |
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72 * system error message. |
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73 */ |
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74 |
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75 void warnx(const char *, ...); |
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76 void vwarnx(const char *, va_list); |
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77 |
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78 #ifdef __cplusplus |
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79 } |
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80 #endif |
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81 |
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82 #endif /* _ERR_H_ */ |
