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annotate util.c @ 0:a9a7ad180c3b version-1

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Initial revision
author Guido Berhoerster <guido+rantaiwarna@berhoerster.name>
date Sat, 15 Mar 2014 18:41:03 +0100
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children 4f6bf50dbc4a
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Guido Berhoerster <guido+rantaiwarna@berhoerster.name>
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1 /*
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2 * Copyright (C) 2014 Guido Berhoerster <guido+rantaiwarna@berhoerster.name>
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3 *
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4 * Permission is hereby granted, free of charge, to any person obtaining
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5 * a copy of this software and associated documentation files (the
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6 * "Software"), to deal in the Software without restriction, including
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7 * without limitation the rights to use, copy, modify, merge, publish,
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8 * distribute, sublicense, and/or sell copies of the Software, and to
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9 * permit persons to whom the Software is furnished to do so, subject to
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10 * the following conditions:
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11 *
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12 * The above copyright notice and this permission notice shall be included
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13 * in all copies or substantial portions of the Software.
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14 *
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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22 */
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23
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24 #define _XOPEN_SOURCE 600
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25
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26 #include <stdlib.h>
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27 #include <string.h>
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28 #include <stdio.h>
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29 #include <errno.h>
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30 #include <curses.h>
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31 #include <term.h>
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32 #include <stdarg.h>
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33
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34 #include "util.h"
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35 #include "compat.h"
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36 #include "rantaiwarna.h"
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37
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38 void
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39 restore_term(void) {
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40 if (curses_init) {
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41 endwin();
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42 curses_init = FALSE;
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43 curs_set(1);
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44 }
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45 }
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46
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47 void
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48 rantaiwarna_err(int eval, const char *fmt, ...)
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49 {
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50 int saved_errno = errno;
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51 va_list args;
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52
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53 restore_term();
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54
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55 fprintf(stderr, "%s: ", progname);
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56 va_start(args, fmt);
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57 if (fmt != NULL) {
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58 vfprintf(stderr, fmt, args);
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59 fprintf(stderr, ": ");
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60 }
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61 va_end(args);
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62 fprintf(stderr, "%s\n", strerror(saved_errno));
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63
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64 exit(eval);
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65 }
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66
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67 void
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68 rantaiwarna_errx(int eval, const char *fmt, ...)
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69 {
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70 va_list args;
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71
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72 restore_term();
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73
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74 fprintf(stderr, "%s: ", progname);
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75 va_start(args, fmt);
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76 if (fmt != NULL) {
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77 vfprintf(stderr, fmt, args);
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78 }
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79 va_end(args);
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80 fputc('\n', stderr);
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81
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82 exit(eval);
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83 }
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84
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85 void *
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86 rantaiwarna_malloc(size_t size)
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87 {
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88 void *ptr;
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89
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90 ptr = malloc(size);
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91 if (ptr == NULL) {
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92 rantaiwarna_err(1, NULL);
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93 }
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94 return (ptr);
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95 }
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96
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97 void *
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98 rantaiwarna_calloc(size_t nelem, size_t elsize)
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99 {
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100 void *ptr;
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101
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102 ptr = calloc(nelem, elsize);
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103 if (ptr == NULL) {
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104 rantaiwarna_err(1, NULL);
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105 }
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106 return (ptr);
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107 }
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108
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109 uint32_t
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110 rantaiwarna_rand(uint32_t *seed)
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111 {
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112 uint32_t x = *seed;
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113
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114 x ^= x << 13;
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115 x ^= x >> 17;
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116 x ^= x << 5;
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117 *seed = x;
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118
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119 return (x);
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120 }