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1 /* glpenv04.c (error handling) */ |
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2 |
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3 /*********************************************************************** |
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4 * This code is part of GLPK (GNU Linear Programming Kit). |
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5 * |
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6 * Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, |
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7 * 2009, 2010 Andrew Makhorin, Department for Applied Informatics, |
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8 * Moscow Aviation Institute, Moscow, Russia. All rights reserved. |
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9 * E-mail: <mao@gnu.org>. |
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10 * |
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11 * GLPK is free software: you can redistribute it and/or modify it |
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12 * under the terms of the GNU General Public License as published by |
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13 * the Free Software Foundation, either version 3 of the License, or |
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14 * (at your option) any later version. |
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15 * |
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16 * GLPK is distributed in the hope that it will be useful, but WITHOUT |
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17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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18 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
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19 * License for more details. |
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20 * |
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21 * You should have received a copy of the GNU General Public License |
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22 * along with GLPK. If not, see <http://www.gnu.org/licenses/>. |
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23 ***********************************************************************/ |
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24 |
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25 #include "glpapi.h" |
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26 |
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27 /*********************************************************************** |
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28 * NAME |
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29 * |
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30 * glp_error - display error message and terminate execution |
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31 * |
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32 * SYNOPSIS |
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33 * |
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34 * void glp_error(const char *fmt, ...); |
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35 * |
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36 * DESCRIPTION |
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37 * |
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38 * The routine glp_error (implemented as a macro) formats its |
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39 * parameters using the format control string fmt, writes the formatted |
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40 * message to the terminal, and abnormally terminates the program. */ |
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41 |
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42 static void error(const char *fmt, ...) |
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43 { ENV *env = get_env_ptr(); |
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44 va_list arg; |
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45 env->term_out = GLP_ON; |
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46 va_start(arg, fmt); |
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47 xvprintf(fmt, arg); |
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48 va_end(arg); |
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49 xprintf("Error detected in file %s at line %d\n", env->err_file, |
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50 env->err_line); |
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51 if (env->err_hook != NULL) |
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52 env->err_hook(env->err_info); |
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53 abort(); |
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54 exit(EXIT_FAILURE); |
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55 /* no return */ |
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56 } |
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57 |
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58 _glp_error glp_error_(const char *file, int line) |
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59 { ENV *env = get_env_ptr(); |
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60 env->err_file = file; |
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61 env->err_line = line; |
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62 return error; |
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63 } |
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64 |
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65 /*********************************************************************** |
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66 * NAME |
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67 * |
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68 * glp_assert - check for logical condition |
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69 * |
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70 * SYNOPSIS |
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71 * |
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72 * #include "glplib.h" |
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73 * void glp_assert(int expr); |
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74 * |
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75 * DESCRIPTION |
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76 * |
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77 * The routine glp_assert (implemented as a macro) checks for a logical |
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78 * condition specified by the parameter expr. If the condition is false |
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79 * (i.e. the value of expr is zero), the routine writes a message to |
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80 * the terminal and abnormally terminates the program. */ |
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81 |
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82 void glp_assert_(const char *expr, const char *file, int line) |
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83 { glp_error_(file, line)("Assertion failed: %s\n", expr); |
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84 /* no return */ |
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85 } |
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86 |
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87 /*********************************************************************** |
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88 * NAME |
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89 * |
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90 * glp_error_hook - install hook to intercept abnormal termination |
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91 * |
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92 * SYNOPSIS |
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93 * |
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94 * void glp_error_hook(void (*func)(void *info), void *info); |
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95 * |
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96 * DESCRIPTION |
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97 * |
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98 * The routine glp_error_hook installs a user-defined hook routine to |
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99 * intercept abnormal termination. |
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100 * |
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101 * The parameter func specifies the user-defined hook routine. It is |
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102 * called from the routine glp_error before the latter calls the abort |
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103 * function to abnormally terminate the application program because of |
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104 * fatal error. The parameter info is a transit pointer, specified in |
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105 * the corresponding call to the routine glp_error_hook; it may be used |
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106 * to pass some information to the hook routine. |
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107 * |
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108 * To uninstall the hook routine the parameters func and info should be |
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109 * specified as NULL. */ |
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110 |
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111 void glp_error_hook(void (*func)(void *info), void *info) |
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112 { ENV *env = get_env_ptr(); |
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113 if (func == NULL) |
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114 { env->err_hook = NULL; |
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115 env->err_info = NULL; |
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116 } |
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117 else |
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118 { env->err_hook = func; |
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119 env->err_info = info; |
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120 } |
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121 return; |
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122 } |
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123 |
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124 /* eof */ |