Mercurial > sci
annotate libsci/util.c @ 33:1d0ddf9e6efd
misc: general documentation
author | David Demelier <markand@malikania.fr> |
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date | Thu, 04 Aug 2022 16:47:10 +0200 |
parents | lib/util.c@081e1c258e64 |
children | e52c762d8ba8 |
rev | line source |
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0 | 1 /* |
2 * util.c -- miscellaneous utilities | |
3 * | |
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4 * Copyright (c) 2021-2022 David Demelier <markand@malikania.fr> |
0 | 5 * |
6 * Permission to use, copy, modify, and/or distribute this software for any | |
7 * purpose with or without fee is hereby granted, provided that the above | |
8 * copyright notice and this permission notice appear in all copies. | |
9 * | |
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
17 */ | |
18 | |
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19 #include <sys/stat.h> |
0 | 20 #include <assert.h> |
30 | 21 #include <errno.h> |
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22 #include <fcntl.h> |
0 | 23 #include <libgen.h> |
24 #include <limits.h> | |
25 #include <stdarg.h> | |
26 #include <stdio.h> | |
27 #include <stdlib.h> | |
28 #include <string.h> | |
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29 #include <unistd.h> |
0 | 30 |
31 #include "util.h" | |
32 | |
33 void * | |
34 util_malloc(size_t size) | |
35 { | |
36 void *ret; | |
37 | |
38 if (!(ret = malloc(size))) | |
30 | 39 util_die("malloc: %s\n", strerror(errno)); |
0 | 40 |
41 return ret; | |
42 } | |
43 | |
44 void * | |
45 util_calloc(size_t n, size_t size) | |
46 { | |
47 void *ret; | |
48 | |
49 if (!(ret = calloc(n, size))) | |
30 | 50 util_die("calloc: %s\n", strerror(errno)); |
0 | 51 |
52 return ret; | |
53 } | |
54 | |
55 void * | |
56 util_realloc(void *ptr, size_t size) | |
57 { | |
58 void *ret; | |
59 | |
60 if (!(ret = realloc(ptr, size)) && size) | |
30 | 61 util_die("realloc: %s\n", strerror(errno)); |
0 | 62 |
63 return ret; | |
64 } | |
65 | |
66 void * | |
67 util_memdup(const void *ptr, size_t size) | |
68 { | |
69 void *ret; | |
70 | |
71 if (!(ret = malloc(size))) | |
30 | 72 util_die("malloc: %s\n", strerror(errno)); |
0 | 73 |
74 return memcpy(ret, ptr, size); | |
75 } | |
76 | |
77 char * | |
78 util_strdup(const char *src) | |
79 { | |
80 char *ret; | |
81 | |
82 if (!(ret = strdup(src))) | |
30 | 83 util_die("strdup: %s\n", strerror(errno)); |
0 | 84 |
85 return ret; | |
86 } | |
87 | |
88 char * | |
89 util_strndup(const char *src, size_t n) | |
90 { | |
91 assert(src); | |
92 | |
93 char *ret; | |
94 | |
95 if (!(ret = strndup(src, n))) | |
30 | 96 util_die("strndup: %s\n", strerror(errno)); |
0 | 97 |
98 return ret; | |
99 } | |
100 | |
101 char * | |
102 util_basename(const char *str) | |
103 { | |
104 static char ret[PATH_MAX]; | |
105 char tmp[PATH_MAX]; | |
106 | |
20 | 107 util_strlcpy(tmp, str, sizeof (tmp)); |
108 util_strlcpy(ret, basename(tmp), sizeof (ret)); | |
0 | 109 |
110 return ret; | |
111 } | |
112 | |
113 char * | |
114 util_dirname(const char *str) | |
115 { | |
116 static char ret[PATH_MAX]; | |
117 char tmp[PATH_MAX]; | |
118 | |
20 | 119 util_strlcpy(tmp, str, sizeof (tmp)); |
120 util_strlcpy(ret, dirname(tmp), sizeof (ret)); | |
0 | 121 |
122 return ret; | |
123 } | |
124 | |
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125 FILE * |
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126 util_fmemopen(void *buf, size_t size, const char *mode) |
0 | 127 { |
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128 FILE *fp; |
0 | 129 |
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130 if (!(fp = fmemopen(buf, size, mode))) |
30 | 131 util_die("fmemopen: %s\n", strerror(errno)); |
0 | 132 |
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133 return fp; |
0 | 134 } |
135 | |
30 | 136 FILE * |
137 util_open_memstream(char **out, size_t *outsz) | |
0 | 138 { |
30 | 139 assert(out); |
140 assert(outsz); | |
0 | 141 |
30 | 142 FILE *fp; |
0 | 143 |
30 | 144 if (!(fp = open_memstream(out, outsz))) |
145 util_die("open_memstream: %s\n", strerror(errno)); | |
0 | 146 |
30 | 147 return fp; |
0 | 148 } |
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149 |
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150 char * |
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151 util_read(const char *path) |
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152 { |
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153 int fd; |
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154 struct stat st; |
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155 char *ret; |
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156 |
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157 if ((fd = open(path, O_RDONLY)) < 0) |
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158 return NULL; |
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159 if (fstat(fd, &st) < 0) |
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160 return close(fd), NULL; |
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161 |
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162 ret = util_calloc(1, st.st_size + 1); |
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163 |
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164 if (read(fd, ret, st.st_size) != st.st_size) { |
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165 free(ret); |
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166 ret = NULL; |
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167 } |
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168 |
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169 close(fd); |
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170 |
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171 return ret; |
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172 } |
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173 |
19 | 174 void |
175 util_die(const char *fmt, ...) | |
176 { | |
177 assert(fmt); | |
178 | |
179 va_list ap; | |
180 | |
181 va_start(ap, fmt); | |
182 vfprintf(stderr, fmt, ap); | |
183 va_end(ap); | |
184 exit(1); | |
185 } | |
30 | 186 |
187 json_t * | |
188 util_json_pack(const char *fmt, ...) | |
189 { | |
190 va_list ap; | |
191 json_t *doc; | |
192 json_error_t err; | |
193 | |
194 va_start(ap, fmt); | |
195 doc = json_vpack_ex(&err, 0, fmt, ap); | |
196 va_end(ap); | |
197 | |
198 if (!doc) | |
199 util_die("json_vpack_ex: %s\n", err.text); | |
200 | |
201 return doc; | |
202 } | |
203 | |
204 char * | |
205 util_json_dump(const json_t *json) | |
206 { | |
207 assert(json); | |
208 | |
209 char *ret; | |
210 | |
211 if (!(ret = json_dumps(json, JSON_COMPACT))) | |
212 util_die("json_dump: %s\n", strerror(ENOMEM)); | |
213 | |
214 return ret; | |
215 } |