Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the libpayload project. |
| 3 | * |
| 4 | * Copyright (C) 2007 Uwe Hermann <uwe@hermann-uwe.de> |
| 5 | * Copyright (C) 2008 Advanced Micro Devices, Inc. |
Patrick Georgi | 980a69b | 2010-06-24 11:16:10 +0000 | [diff] [blame^] | 6 | * Copyright (C) 2010 coresystems GmbH |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. The name of the author may not be used to endorse or promote products |
| 17 | * derived from this software without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 29 | * SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include <libpayload.h> |
Patrick Georgi | 980a69b | 2010-06-24 11:16:10 +0000 | [diff] [blame^] | 33 | #include <string.h> |
| 34 | #include <ctype.h> |
| 35 | #include <errno.h> |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 36 | |
| 37 | /** |
| 38 | * Calculate the length of a fixed-size string. |
| 39 | * |
| 40 | * @param str The input string. |
| 41 | * @param maxlen Return at most maxlen characters as length of the string. |
| 42 | * @return The length of the string, not including the final NUL character. |
| 43 | * The maximum length returned is maxlen. |
| 44 | */ |
| 45 | size_t strnlen(const char *str, size_t maxlen) |
| 46 | { |
| 47 | size_t len = 0; |
| 48 | |
| 49 | /* NULL and empty strings have length 0. */ |
| 50 | if (!str) |
| 51 | return 0; |
| 52 | |
| 53 | /* Loop until we find a NUL character, or maxlen is reached. */ |
| 54 | while ((*str++ != '\0') && (len < maxlen)) |
| 55 | len++; |
| 56 | |
| 57 | return len; |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Calculate the length of a string. |
| 62 | * |
| 63 | * @param str The input string. |
| 64 | * @return The length of the string, not including the final NUL character. |
| 65 | */ |
| 66 | size_t strlen(const char *str) |
| 67 | { |
| 68 | size_t len = 0; |
| 69 | |
| 70 | /* NULL and empty strings have length 0. */ |
| 71 | if (!str) |
| 72 | return 0; |
| 73 | |
| 74 | /* Loop until we find a NUL character. */ |
| 75 | while (*str++ != '\0') |
| 76 | len++; |
| 77 | |
| 78 | return len; |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Compare two strings. |
| 83 | * |
| 84 | * @param s1 The first string. |
| 85 | * @param s2 The second string. |
| 86 | * @return Returns a value less than zero, if s1 is shorter than s2. Returns |
| 87 | * zero, if s1 equals s2. Returns a value greater than zero, if |
| 88 | * s1 is longer than s2. |
| 89 | */ |
Patrick Georgi | 980a69b | 2010-06-24 11:16:10 +0000 | [diff] [blame^] | 90 | int strcasecmp(const char *s1, const char *s2) |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 91 | { |
Patrick Georgi | 980a69b | 2010-06-24 11:16:10 +0000 | [diff] [blame^] | 92 | int i; |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 93 | |
Patrick Georgi | 980a69b | 2010-06-24 11:16:10 +0000 | [diff] [blame^] | 94 | for (i = 0; 1; i++) { |
| 95 | if (tolower(s1[i]) != tolower(s2[i])) |
| 96 | return s1[i] - s2[i]; |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 97 | } |
| 98 | |
Patrick Georgi | 980a69b | 2010-06-24 11:16:10 +0000 | [diff] [blame^] | 99 | return 0; |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Compare two strings with fixed length. |
| 104 | * |
| 105 | * @param s1 The first string. |
| 106 | * @param s2 The second string. |
| 107 | * @param maxlen Return at most maxlen characters as length of the string. |
| 108 | * @return A non-zero value if s1 and s2 differ, or zero if s1 equals s2. |
| 109 | */ |
| 110 | int strncasecmp(const char *s1, const char *s2, size_t maxlen) |
| 111 | { |
| 112 | int i; |
| 113 | |
| 114 | for (i = 0; i < maxlen; i++) { |
| 115 | if (tolower(s1[i]) != tolower(s2[i])) |
| 116 | return s1[i] - s2[i]; |
| 117 | } |
| 118 | |
| 119 | return 0; |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Compare two strings. |
| 124 | * |
| 125 | * @param s1 The first string. |
| 126 | * @param s2 The second string. |
| 127 | * @return Returns a value less than zero, if s1 is shorter than s2. Returns |
| 128 | * zero, if s1 equals s2. Returns a value greater than zero, if |
| 129 | * s1 is longer than s2. |
| 130 | */ |
| 131 | int strcmp(const char *s1, const char *s2) |
| 132 | { |
| 133 | int i; |
| 134 | |
| 135 | for (i = 0; 1; i++) { |
| 136 | if (s1[i] != s2[i]) |
| 137 | return s1[i] - s2[i]; |
| 138 | } |
| 139 | |
| 140 | return 0; |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 141 | } |
| 142 | |
| 143 | /** |
| 144 | * Compare two strings with fixed length. |
| 145 | * |
| 146 | * @param s1 The first string. |
| 147 | * @param s2 The second string. |
| 148 | * @param maxlen Return at most maxlen characters as length of the string. |
| 149 | * @return A non-zero value if s1 and s2 differ, or zero if s1 equals s2. |
| 150 | */ |
Stefan Reinauer | 3b9d1b8 | 2008-08-26 21:51:04 +0000 | [diff] [blame] | 151 | int strncmp(const char *s1, const char *s2, size_t maxlen) |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 152 | { |
| 153 | int i; |
| 154 | |
| 155 | for (i = 0; i < maxlen; i++) { |
| 156 | if (s1[i] != s2[i]) |
| 157 | return s1[i] - s2[i]; |
| 158 | } |
| 159 | |
| 160 | return 0; |
| 161 | } |
| 162 | |
Stefan Reinauer | 4151439 | 2008-09-26 18:42:40 +0000 | [diff] [blame] | 163 | /** |
| 164 | * Copy a string with a maximum length. |
| 165 | * |
| 166 | * @param d The destination memory. |
| 167 | * @param s The source string. |
| 168 | * @param n Copy at most n characters as length of the string. |
| 169 | * @return A pointer to the destination memory. |
| 170 | */ |
Stefan Reinauer | 3b9d1b8 | 2008-08-26 21:51:04 +0000 | [diff] [blame] | 171 | char *strncpy(char *d, const char *s, size_t n) |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 172 | { |
Uwe Hermann | 2901405 | 2008-03-21 15:47:38 +0000 | [diff] [blame] | 173 | /* Use +1 to get the NUL terminator. */ |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 174 | int max = n > strlen(s) + 1 ? strlen(s) + 1 : n; |
| 175 | int i; |
| 176 | |
Uwe Hermann | 6a441bf | 2008-03-20 19:54:59 +0000 | [diff] [blame] | 177 | for (i = 0; i < max; i++) |
| 178 | d[i] = (char)s[i]; |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 179 | |
| 180 | return d; |
| 181 | } |
| 182 | |
Stefan Reinauer | 4151439 | 2008-09-26 18:42:40 +0000 | [diff] [blame] | 183 | /** |
| 184 | * Copy a string. |
| 185 | * |
| 186 | * @param d The destination memory. |
| 187 | * @param s The source string. |
| 188 | * @return A pointer to the destination memory. |
| 189 | */ |
Jordan Crouse | 2c7bb9e | 2008-03-20 01:13:28 +0000 | [diff] [blame] | 190 | char *strcpy(char *d, const char *s) |
| 191 | { |
Uwe Hermann | 2901405 | 2008-03-21 15:47:38 +0000 | [diff] [blame] | 192 | return strncpy(d, s, strlen(s) + 1); |
Jordan Crouse | 2c7bb9e | 2008-03-20 01:13:28 +0000 | [diff] [blame] | 193 | } |
| 194 | |
Stefan Reinauer | 4151439 | 2008-09-26 18:42:40 +0000 | [diff] [blame] | 195 | /** |
Patrick Georgi | 980a69b | 2010-06-24 11:16:10 +0000 | [diff] [blame^] | 196 | * Concatenates two strings |
| 197 | * |
| 198 | * @param d The destination string. |
| 199 | * @param s The source string. |
| 200 | * @return A pointer to the destination string. |
| 201 | */ |
| 202 | char *strcat(char *d, const char *s) |
| 203 | { |
| 204 | char *p = d + strlen(d); |
| 205 | int sl = strlen(s); |
| 206 | int i; |
| 207 | |
| 208 | for (i = 0; i < sl; i++) |
| 209 | p[i] = s[i]; |
| 210 | |
| 211 | p[i] = '\0'; |
| 212 | return d; |
| 213 | } |
| 214 | |
| 215 | /** |
Stefan Reinauer | 4151439 | 2008-09-26 18:42:40 +0000 | [diff] [blame] | 216 | * Concatenates two strings with a maximum length. |
| 217 | * |
| 218 | * @param d The destination string. |
| 219 | * @param s The source string. |
Stefan Reinauer | 052d591 | 2009-08-05 13:10:38 +0000 | [diff] [blame] | 220 | * @param n Not more than n characters from s will be appended to d. |
Stefan Reinauer | 4151439 | 2008-09-26 18:42:40 +0000 | [diff] [blame] | 221 | * @return A pointer to the destination string. |
| 222 | */ |
Stefan Reinauer | 3b9d1b8 | 2008-08-26 21:51:04 +0000 | [diff] [blame] | 223 | char *strncat(char *d, const char *s, size_t n) |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 224 | { |
| 225 | char *p = d + strlen(d); |
Stefan Reinauer | e5d30b7 | 2010-03-25 22:15:19 +0000 | [diff] [blame] | 226 | int sl = strlen(s); |
| 227 | int max = n > sl ? sl : n; |
| 228 | // int max = n > strlen(s) ? strlen(s) : n; |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 229 | int i; |
| 230 | |
Uwe Hermann | 6a441bf | 2008-03-20 19:54:59 +0000 | [diff] [blame] | 231 | for (i = 0; i < max; i++) |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 232 | p[i] = s[i]; |
| 233 | |
| 234 | p[i] = '\0'; |
| 235 | return d; |
| 236 | } |
| 237 | |
Stefan Reinauer | 4151439 | 2008-09-26 18:42:40 +0000 | [diff] [blame] | 238 | /** |
Stefan Reinauer | e5d30b7 | 2010-03-25 22:15:19 +0000 | [diff] [blame] | 239 | * Concatenates two strings with a maximum length. |
| 240 | * |
| 241 | * @param d The destination string. |
| 242 | * @param s The source string. |
| 243 | * @param n Not more than n characters from s will be appended to d. |
| 244 | * @return A pointer to the destination string. |
| 245 | */ |
| 246 | size_t strlcat(char *d, const char *s, size_t n) |
| 247 | { |
| 248 | int sl = strlen(s); |
| 249 | int dl = strlen(d); |
| 250 | |
| 251 | char *p = d + dl; |
| 252 | int max = n > (sl + dl) ? sl : (n - dl - 1); |
| 253 | int i; |
| 254 | |
| 255 | for (i = 0; i < max; i++) |
| 256 | p[i] = s[i]; |
| 257 | |
| 258 | p[i] = '\0'; |
| 259 | return max; |
| 260 | } |
| 261 | |
| 262 | /** |
Stefan Reinauer | 4151439 | 2008-09-26 18:42:40 +0000 | [diff] [blame] | 263 | * Find a character in a string. |
| 264 | * |
| 265 | * @param s The string. |
| 266 | * @param c The character. |
| 267 | * @return A pointer to the first occurence of the character in the |
| 268 | * string, or NULL if the character was not encountered within the string. |
| 269 | */ |
Uwe Hermann | 6a441bf | 2008-03-20 19:54:59 +0000 | [diff] [blame] | 270 | char *strchr(const char *s, int c) |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 271 | { |
Uwe Hermann | 6a441bf | 2008-03-20 19:54:59 +0000 | [diff] [blame] | 272 | char *p = (char *)s; |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 273 | |
Uwe Hermann | 6a441bf | 2008-03-20 19:54:59 +0000 | [diff] [blame] | 274 | for (; *p != 0; p++) { |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 275 | if (*p == c) |
| 276 | return p; |
| 277 | } |
| 278 | |
| 279 | return NULL; |
| 280 | } |
| 281 | |
Stefan Reinauer | 4151439 | 2008-09-26 18:42:40 +0000 | [diff] [blame] | 282 | /** |
Stefan Reinauer | e5d30b7 | 2010-03-25 22:15:19 +0000 | [diff] [blame] | 283 | * Find a character in a string. |
| 284 | * |
| 285 | * @param s The string. |
| 286 | * @param c The character. |
| 287 | * @return A pointer to the last occurence of the character in the |
| 288 | * string, or NULL if the character was not encountered within the string. |
| 289 | */ |
| 290 | |
| 291 | char *strrchr(const char *s, int c) |
| 292 | { |
| 293 | char *p = (char *)s + strlen(s); |
| 294 | |
| 295 | for (; p >= s; p--) { |
| 296 | if (*p == c) |
| 297 | return p; |
| 298 | } |
| 299 | |
| 300 | return NULL; |
| 301 | } |
| 302 | |
| 303 | /** |
Stefan Reinauer | 4151439 | 2008-09-26 18:42:40 +0000 | [diff] [blame] | 304 | * Duplicate a string. |
| 305 | * |
| 306 | * @param s The string to duplicate. |
| 307 | * @return A pointer to the copy of the original string. |
| 308 | */ |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 309 | char *strdup(const char *s) |
| 310 | { |
| 311 | int n = strlen(s); |
Jordan Crouse | c781584 | 2008-04-25 23:07:39 +0000 | [diff] [blame] | 312 | char *p = malloc(n + 1); |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 313 | |
Stefan Reinauer | ac29d61 | 2009-01-26 00:57:54 +0000 | [diff] [blame] | 314 | if (p != NULL) { |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 315 | strncpy(p, s, n); |
Stefan Reinauer | ac29d61 | 2009-01-26 00:57:54 +0000 | [diff] [blame] | 316 | p[n] = 0; |
| 317 | } |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 318 | return p; |
| 319 | } |
| 320 | |
Stefan Reinauer | 4151439 | 2008-09-26 18:42:40 +0000 | [diff] [blame] | 321 | /** |
| 322 | * Find a substring within a string. |
| 323 | * |
| 324 | * @param h The haystack string. |
| 325 | * @param n The needle string (substring). |
| 326 | * @return A pointer to the first occurence of the substring in |
| 327 | * the string, or NULL if the substring was not encountered within the string. |
| 328 | */ |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 329 | char *strstr(const char *h, const char *n) |
| 330 | { |
| 331 | int hn = strlen(h); |
| 332 | int nn = strlen(n); |
| 333 | int i; |
| 334 | |
Uwe Hermann | 6a441bf | 2008-03-20 19:54:59 +0000 | [diff] [blame] | 335 | for (i = 0; i <= hn - nn; i++) |
Stefan Reinauer | 0d348f9 | 2009-03-06 17:43:20 +0000 | [diff] [blame] | 336 | if (!memcmp(&h[i], n, nn)) |
Uwe Hermann | 6a441bf | 2008-03-20 19:54:59 +0000 | [diff] [blame] | 337 | return (char *)&h[i]; |
Jordan Crouse | f6145c3 | 2008-03-19 23:56:58 +0000 | [diff] [blame] | 338 | |
| 339 | return NULL; |
| 340 | } |
Stefan Reinauer | 4151439 | 2008-09-26 18:42:40 +0000 | [diff] [blame] | 341 | |
| 342 | /** |
| 343 | * Separate strings. |
| 344 | * |
| 345 | * @param stringp reference of the string to separate. |
| 346 | * @param delim string containing all delimiters. |
| 347 | * @return Token string. |
| 348 | */ |
| 349 | char *strsep(char **stringp, const char *delim) |
| 350 | { |
| 351 | char *walk, *token; |
| 352 | |
| 353 | if (!stringp || !*stringp || !**stringp) |
| 354 | return NULL; |
| 355 | |
| 356 | token = walk = *stringp; |
| 357 | |
| 358 | /* Walk, search for delimiters */ |
| 359 | while(*walk && !strchr(delim, *walk)) |
| 360 | walk++; |
| 361 | |
| 362 | if (*walk) { |
| 363 | /* NUL terminate */ |
| 364 | *walk = '\0'; |
| 365 | walk++; |
| 366 | } |
| 367 | |
| 368 | *stringp = walk; |
| 369 | |
| 370 | return token; |
| 371 | } |
| 372 | |
Jordan Crouse | c53cdd7 | 2008-10-20 17:07:47 +0000 | [diff] [blame] | 373 | /* Check that a character is in the valid range for the |
| 374 | given base |
| 375 | */ |
| 376 | |
| 377 | static int _valid(char ch, int base) |
| 378 | { |
| 379 | char end = (base > 9) ? '9' : '0' + (base - 1); |
| 380 | |
| 381 | /* all bases will be some subset of the 0-9 range */ |
| 382 | |
| 383 | if (ch >= '0' && ch <= end) |
| 384 | return 1; |
| 385 | |
| 386 | /* Bases > 11 will also have to match in the a-z range */ |
| 387 | |
| 388 | if (base > 11) { |
| 389 | if (tolower(ch) >= 'a' && |
| 390 | tolower(ch) <= 'a' + (base - 11)) |
| 391 | return 1; |
| 392 | } |
| 393 | |
| 394 | return 0; |
| 395 | } |
| 396 | |
| 397 | /* Return the "value" of the character in the given base */ |
| 398 | |
| 399 | static int _offset(char ch, int base) |
| 400 | { |
| 401 | if (ch >= '0' && ch <= '9') |
| 402 | return ch - '0'; |
| 403 | else |
| 404 | return tolower(ch) - 'a'; |
| 405 | } |
| 406 | |
| 407 | /** |
Patrick Georgi | 980a69b | 2010-06-24 11:16:10 +0000 | [diff] [blame^] | 408 | * Convert the initial portion of a string into a signed int |
| 409 | * @param ptr A pointer to the string to convert |
| 410 | * @param endptr A pointer to the unconverted part of the string |
| 411 | * @param base The base of the number to convert, or 0 for auto |
| 412 | * @return A signed integer representation of the string |
| 413 | */ |
| 414 | |
| 415 | long int strtol(const char *ptr, char **endptr, int base) |
| 416 | { |
| 417 | int ret = 0; |
| 418 | int negative = 1; |
| 419 | |
| 420 | if (endptr != NULL) |
| 421 | *endptr = (char *) ptr; |
| 422 | |
| 423 | /* Purge whitespace */ |
| 424 | |
| 425 | for( ; *ptr && isspace(*ptr); ptr++); |
| 426 | |
| 427 | if (ptr[0] == '-') { |
| 428 | negative = -1; |
| 429 | ptr++; |
| 430 | } |
| 431 | |
| 432 | if (!*ptr) |
| 433 | return 0; |
| 434 | |
| 435 | /* Determine the base */ |
| 436 | |
| 437 | if (base == 0) { |
| 438 | if (ptr[0] == '0' && (ptr[1] == 'x' || ptr[1] == 'X')) |
| 439 | base = 16; |
| 440 | else if (ptr[0] == '0') { |
| 441 | base = 8; |
| 442 | ptr++; |
| 443 | } |
| 444 | else |
| 445 | base = 10; |
| 446 | } |
| 447 | |
| 448 | /* Base 16 allows the 0x on front - so skip over it */ |
| 449 | |
| 450 | if (base == 16) { |
| 451 | if (ptr[0] == '0' && (ptr[1] == 'x' || ptr[1] == 'X')) |
| 452 | ptr += 2; |
| 453 | } |
| 454 | |
| 455 | /* If the first character isn't valid, then don't |
| 456 | * bother */ |
| 457 | |
| 458 | if (!*ptr || !_valid(*ptr, base)) |
| 459 | return 0; |
| 460 | |
| 461 | for( ; *ptr && _valid(*ptr, base); ptr++) |
| 462 | ret = (ret * base) + _offset(*ptr, base); |
| 463 | |
| 464 | if (endptr != NULL) |
| 465 | *endptr = (char *) ptr; |
| 466 | |
| 467 | return ret * negative; |
| 468 | } |
| 469 | |
| 470 | /** |
Jordan Crouse | c53cdd7 | 2008-10-20 17:07:47 +0000 | [diff] [blame] | 471 | * Convert the initial portion of a string into an unsigned int |
| 472 | * @param ptr A pointer to the string to convert |
| 473 | * @param endptr A pointer to the unconverted part of the string |
| 474 | * @param base The base of the number to convert, or 0 for auto |
| 475 | * @return An unsigned integer representation of the string |
| 476 | */ |
| 477 | |
Patrick Georgi | 980a69b | 2010-06-24 11:16:10 +0000 | [diff] [blame^] | 478 | unsigned long int strtoul(const char *ptr, char **endptr, int base) |
Jordan Crouse | c53cdd7 | 2008-10-20 17:07:47 +0000 | [diff] [blame] | 479 | { |
| 480 | int ret = 0; |
| 481 | |
| 482 | if (endptr != NULL) |
| 483 | *endptr = (char *) ptr; |
| 484 | |
| 485 | /* Purge whitespace */ |
| 486 | |
| 487 | for( ; *ptr && isspace(*ptr); ptr++); |
| 488 | |
| 489 | if (!*ptr) |
| 490 | return 0; |
| 491 | |
| 492 | /* Determine the base */ |
| 493 | |
| 494 | if (base == 0) { |
| 495 | if (ptr[0] == '0' && (ptr[1] == 'x' || ptr[1] == 'X')) |
| 496 | base = 16; |
| 497 | else if (ptr[0] == '0') { |
| 498 | base = 8; |
| 499 | ptr++; |
| 500 | } |
| 501 | else |
| 502 | base = 10; |
| 503 | } |
| 504 | |
| 505 | /* Base 16 allows the 0x on front - so skip over it */ |
| 506 | |
| 507 | if (base == 16) { |
| 508 | if (ptr[0] == '0' && (ptr[1] == 'x' || ptr[1] == 'X')) |
| 509 | ptr += 2; |
| 510 | } |
| 511 | |
| 512 | /* If the first character isn't valid, then don't |
| 513 | * bother */ |
| 514 | |
| 515 | if (!*ptr || !_valid(*ptr, base)) |
| 516 | return 0; |
| 517 | |
| 518 | for( ; *ptr && _valid(*ptr, base); ptr++) |
| 519 | ret = (ret * base) + _offset(*ptr, base); |
| 520 | |
| 521 | if (endptr != NULL) |
| 522 | *endptr = (char *) ptr; |
| 523 | |
| 524 | return ret; |
| 525 | } |
| 526 | |
Patrick Georgi | 980a69b | 2010-06-24 11:16:10 +0000 | [diff] [blame^] | 527 | /** |
| 528 | * Determine the number of leading characters in s that match characters in a |
| 529 | * @param s A pointer to the string to analyse |
| 530 | * @param a A pointer to an array of characters that match the prefix |
| 531 | * @return The number of matching characters |
| 532 | */ |
Jordan Crouse | c53cdd7 | 2008-10-20 17:07:47 +0000 | [diff] [blame] | 533 | |
Patrick Georgi | 980a69b | 2010-06-24 11:16:10 +0000 | [diff] [blame^] | 534 | size_t strspn(const char *s, const char *a) |
| 535 | { |
| 536 | int i, j; |
| 537 | int al = strlen(a); |
| 538 | for (i = 0; s[i] != 0; i++) { |
| 539 | int found = 0; |
| 540 | for (j = 0; j < al; j++) { |
| 541 | if (s[i] == a[j]) { |
| 542 | found = 1; |
| 543 | break; |
| 544 | } |
| 545 | } |
| 546 | if (!found) |
| 547 | break; |
| 548 | } |
| 549 | return i; |
| 550 | } |
| 551 | |
| 552 | /** |
| 553 | * Determine the number of leading characters in s that do not match characters in a |
| 554 | * @param s A pointer to the string to analyse |
| 555 | * @param a A pointer to an array of characters that do not match the prefix |
| 556 | * @return The number of not matching characters |
| 557 | */ |
| 558 | |
| 559 | size_t strcspn(const char *s, const char *a) |
| 560 | { |
| 561 | int i, j; |
| 562 | int al = strlen(a); |
| 563 | for (i = 0; s[i] != 0; i++) { |
| 564 | int found = 0; |
| 565 | for (j = 0; j < al; j++) { |
| 566 | if (s[i] == a[j]) { |
| 567 | found = 1; |
| 568 | break; |
| 569 | } |
| 570 | } |
| 571 | if (found) |
| 572 | break; |
| 573 | } |
| 574 | return i; |
| 575 | } |
| 576 | |
| 577 | /** |
| 578 | * Extract first token in string str that is delimited by a character in tokens. |
| 579 | * Destroys str and eliminates the token delimiter. |
| 580 | * @param str A pointer to the string to tokenize. |
| 581 | * @param delim A pointer to an array of characters that delimit the token |
| 582 | * @param ptr A pointer to a string pointer to keep state of the tokenizer |
| 583 | * @return Pointer to token |
| 584 | */ |
| 585 | |
| 586 | char* strtok_r(char *str, const char *delim, char **ptr) |
| 587 | { |
| 588 | /* start new tokenizing job or continue existing one? */ |
| 589 | if (str == NULL) |
| 590 | str = *ptr; |
| 591 | |
| 592 | /* skip over prefix delimiters */ |
| 593 | char *start = str + strspn(str, delim); |
| 594 | |
| 595 | /* find first delimiter character */ |
| 596 | char *end = start + strcspn(start, delim); |
| 597 | end[0] = '\0'; |
| 598 | |
| 599 | *ptr = end+1; |
| 600 | return start; |
| 601 | } |
| 602 | |
| 603 | static char **strtok_global; |
| 604 | |
| 605 | /** |
| 606 | * Extract first token in string str that is delimited by a character in tokens. |
| 607 | * Destroys str, eliminates the token delimiter and uses global state. |
| 608 | * @param str A pointer to the string to tokenize. |
| 609 | * @param delim A pointer to an array of characters that delimit the token |
| 610 | * @return Pointer to token |
| 611 | */ |
| 612 | |
| 613 | char* strtok(char *str, const char *delim) |
| 614 | { |
| 615 | return strtok_r(str, delim, strtok_global); |
| 616 | } |
| 617 | |
| 618 | /** |
| 619 | * Print error message and error number |
| 620 | * @param s Error message to print |
| 621 | */ |
| 622 | void perror(const char *s) |
| 623 | { |
| 624 | printf("%s: %d\n", s?s:"(none)", errno); |
| 625 | } |