Mercurial > hg > th-libs
annotate th_string.c @ 10:a25f5d22483e
Updates.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Mon, 20 Apr 2009 00:01:43 +0300 |
| parents | acc2a8035dd5 |
| children | e5e6370217ef |
| rev | line source |
|---|---|
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1 /* |
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2 * Miscellaneous string-handling related utility-functions |
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3 * Programmed and designed by Matti 'ccr' Hamalainen |
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4 * (C) Copyright 2002-2008 Tecnic Software productions (TNSP) |
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5 * |
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6 * Please read file 'COPYING' for information on license and distribution. |
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7 */ |
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8 #ifdef HAVE_CONFIG_H |
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9 #include "config.h" |
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10 #endif |
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11 #include "th_string.h" |
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12 |
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13 #define LPREV (pNode->pPrev) |
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14 #define LNEXT (pNode->pNext) |
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15 |
| 8 | 16 |
| 17 /* strdup with a NULL check | |
| 18 */ | |
| 19 char *th_strdup(const char *s) | |
| 20 { | |
| 10 | 21 char *res; |
| 22 if (s == NULL) | |
| 23 return NULL; | |
| 24 | |
| 25 if ((res = th_malloc(strlen(s) + 1)) == NULL) | |
| 26 return NULL; | |
| 27 | |
| 28 strcpy(res, s); | |
| 29 return res; | |
| 8 | 30 } |
| 31 | |
| 32 | |
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33 /* Allocate memory for a string with given length |
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34 */ |
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35 char *th_stralloc(const size_t l) |
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36 { |
| 10 | 37 assert(l > 0); |
| 38 return th_malloc(sizeof(char) * l); | |
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39 } |
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40 |
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41 |
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42 char *th_strrealloc(char * s, const size_t l) |
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43 { |
| 10 | 44 assert(l > 0); |
| 45 return th_realloc(s, sizeof(char) * l); | |
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46 } |
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47 |
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48 |
| 7 | 49 char *th_strncpy(char * dst, const char * src, size_t n) |
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50 { |
| 10 | 51 const char *s = src; |
| 52 char *d = dst; | |
| 53 size_t i; | |
| 54 assert(src != NULL); | |
| 55 assert(dst != NULL); | |
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56 |
| 10 | 57 /* Copy to the destination */ |
| 58 i = n; | |
| 59 while (*s && (i > 0)) { | |
| 60 *(d++) = *(s++); | |
| 61 i--; | |
| 62 } | |
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63 |
| 10 | 64 /* Fill rest of space with zeros */ |
| 65 while (i > 0) { | |
| 66 *(d++) = 0; | |
| 67 i--; | |
| 68 } | |
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69 |
| 10 | 70 /* Ensure that last is always zero */ |
| 71 dst[n - 1] = 0; | |
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72 |
| 10 | 73 return dst; |
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74 } |
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75 |
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76 |
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77 int th_strncmp(char * str1, char * str2, size_t n) |
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78 { |
| 10 | 79 char *s1, *s2; |
| 80 assert(str1 != NULL); | |
| 81 assert(str2 != NULL); | |
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82 |
| 10 | 83 /* Check the string pointers */ |
| 84 if (str1 == str2) | |
| 85 return 0; | |
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86 |
| 10 | 87 /* Go through the string */ |
| 88 s1 = str1; | |
| 89 s2 = str2; | |
| 90 while ((n > 0) && *s1 && *s2 && (*s1 == *s2)) { | |
| 91 s1++; | |
| 92 s2++; | |
| 93 n--; | |
| 94 } | |
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95 |
| 10 | 96 if (n > 0) |
| 97 return ((*s1) - (*s2)); | |
| 98 else | |
| 99 return 0; | |
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100 } |
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101 |
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102 |
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103 /* Compare two strings ignoring case [strcasecmp, strncasecmp] |
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104 */ |
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105 int th_strcasecmp(char * str1, char * str2) |
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106 { |
| 10 | 107 char *s1 = str1, *s2 = str2; |
| 108 assert(str1 != NULL); | |
| 109 assert(str2 != NULL); | |
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110 |
| 10 | 111 /* Check the string pointers */ |
| 112 if (str1 == str2) | |
| 113 return 0; | |
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114 |
| 10 | 115 /* Go through the string */ |
| 116 while (*s1 && *s2 && (th_tolower(*s1) == th_tolower(*s2))) { | |
| 117 s1++; | |
| 118 s2++; | |
| 119 } | |
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120 |
| 10 | 121 return (th_tolower(*s1) - th_tolower(*s2)); |
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122 } |
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123 |
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124 |
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125 int th_strncasecmp(char * str1, char * str2, size_t n) |
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126 { |
| 10 | 127 char *s1 = str1, *s2 = str2; |
| 128 assert(str1 != NULL); | |
| 129 assert(str2 != NULL); | |
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130 |
| 10 | 131 /* Check the string pointers */ |
| 132 if (str1 == str2) | |
| 133 return 0; | |
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134 |
| 10 | 135 /* Go through the string */ |
| 136 while ((n > 0) && *s1 && *s2 && (th_tolower(*s1) == th_tolower(*s2))) { | |
| 137 s1++; | |
| 138 s2++; | |
| 139 n--; | |
| 140 } | |
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141 |
| 10 | 142 if (n > 0) |
| 143 return (th_tolower(*s1) - th_tolower(*s2)); | |
| 144 else | |
| 145 return 0; | |
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146 } |
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147 |
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148 |
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149 /* Remove all occurences of control characters, in-place. |
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150 * Resulting string is always shorter or same length than original. |
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151 */ |
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152 void th_strip_ctrlchars(char * str) |
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153 { |
| 10 | 154 char *i, *j; |
| 155 assert(str != NULL); | |
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156 |
| 10 | 157 i = str; |
| 158 j = str; | |
| 159 while (*i) { | |
| 160 if (!th_iscntrl(*i)) | |
| 161 *(j++) = *i; | |
| 162 i++; | |
| 163 } | |
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164 |
| 10 | 165 *j = 0; |
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166 } |
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167 |
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168 |
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169 /* Copy a given string over in *result. |
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170 */ |
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171 int th_pstrcpy(char ** result, char * str) |
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172 { |
| 10 | 173 assert(result != NULL); |
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174 |
| 10 | 175 /* Check the string pointers */ |
| 176 if (str == NULL) | |
| 177 return -1; | |
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178 |
| 10 | 179 /* Allocate memory for destination */ |
| 180 th_free(*result); | |
| 181 *result = th_stralloc(strlen(str) + 1); | |
| 182 if (!*result) | |
| 183 return -2; | |
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184 |
| 10 | 185 /* Copy to the destination */ |
| 186 strcpy(*result, str); | |
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187 |
| 10 | 188 return 0; |
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189 } |
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190 |
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191 |
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192 /* Concatenates a given string into string pointed by *result. |
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193 */ |
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194 int th_pstrcat(char ** result, char * str) |
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195 { |
| 10 | 196 assert(result != NULL); |
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197 |
| 10 | 198 /* Check the string pointers */ |
| 199 if (str == NULL) | |
| 200 return -1; | |
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201 |
| 10 | 202 if (*result != NULL) { |
| 203 *result = th_strrealloc(*result, strlen(*result) + strlen(str) + 1); | |
| 204 if (*result == NULL) | |
| 205 return -1; | |
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206 |
| 10 | 207 strcat(*result, str); |
| 208 } else { | |
| 209 *result = th_stralloc(strlen(str) + 1); | |
| 210 if (*result == NULL) | |
| 211 return -1; | |
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212 |
| 10 | 213 strcpy(*result, str); |
| 214 } | |
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215 |
| 10 | 216 return 0; |
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217 } |
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218 |
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219 |
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220 /* Find next non-whitespace character in string. |
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221 * Updates iPos into the position of such character and |
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222 * returns pointer to the string. |
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223 */ |
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224 char *th_findnext(char * str, size_t * iPos) |
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225 { |
| 10 | 226 assert(str != NULL); |
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227 |
| 10 | 228 /* Terminating NULL-character is not whitespace! */ |
| 229 while (th_isspace(str[*iPos])) | |
| 230 (*iPos)++; | |
| 231 return &str[*iPos]; | |
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232 } |
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233 |
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234 |
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235 /* Find next chSep-character from string |
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236 */ |
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237 char *th_findsep(char * str, size_t * iPos, char chSep) |
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238 { |
| 10 | 239 assert(str != NULL); |
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240 |
| 10 | 241 /* Terminating NULL-character is not digit! */ |
| 242 while (str[*iPos] && (str[*iPos] != chSep)) | |
| 243 (*iPos)++; | |
| 244 return &str[*iPos]; | |
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245 } |
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246 |
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247 |
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248 /* Find next chSep- or whitespace from string |
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249 */ |
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250 char *th_findseporspace(char * str, size_t * iPos, char chSep) |
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251 { |
| 10 | 252 assert(str != NULL); |
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253 |
| 10 | 254 /* Terminating NULL-character is not digit! */ |
| 255 while (!th_isspace(str[*iPos]) && (str[*iPos] != chSep)) | |
| 256 (*iPos)++; | |
| 257 return &str[*iPos]; | |
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258 } |
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259 |
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260 |
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261 /* Compare a string to a pattern. Case-SENSITIVE version. |
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262 * The matching pattern can consist of any normal characters plus |
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263 * wildcards ? and *. "?" matches any character and "*" matches |
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264 * any number of characters. |
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265 */ |
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266 BOOL th_strmatch(char * str, char * pattern) |
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267 { |
| 10 | 268 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
| 269 char *tmpPattern = NULL; | |
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270 |
| 10 | 271 /* Check given pattern and string */ |
| 272 if (str == NULL || pattern == NULL) | |
| 273 return FALSE; | |
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274 |
| 10 | 275 /* Start comparision */ |
| 276 do { | |
| 277 didMatch = FALSE; | |
| 278 switch (*pattern) { | |
| 279 case '?': | |
| 280 /* Any single character matches */ | |
| 281 if (*str) { | |
| 282 didMatch = TRUE; | |
| 283 pattern++; | |
| 284 str++; | |
| 285 } | |
| 286 break; | |
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287 |
| 10 | 288 case '*': |
| 289 didMatch = TRUE; | |
| 290 pattern++; | |
| 291 if (!*pattern) | |
| 292 isEnd = TRUE; | |
| 293 isAnyMode = TRUE; | |
| 294 tmpPattern = pattern; | |
| 295 break; | |
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296 |
| 10 | 297 case 0: |
| 298 if (isAnyMode) { | |
| 299 if (*str) | |
| 300 str++; | |
| 301 else | |
| 302 isEnd = TRUE; | |
| 303 } else { | |
| 304 if (*str) { | |
| 305 if (tmpPattern) { | |
| 306 isAnyMode = TRUE; | |
| 307 pattern = tmpPattern; | |
| 308 } else | |
| 309 didMatch = FALSE; | |
| 310 } else | |
| 311 isEnd = TRUE; | |
| 312 } | |
| 313 break; | |
| 314 default: | |
| 315 if (isAnyMode) { | |
| 316 if (*pattern == *str) { | |
| 317 isAnyMode = FALSE; | |
| 318 didMatch = TRUE; | |
| 319 } else { | |
| 320 if (*str) { | |
| 321 didMatch = TRUE; | |
| 322 str++; | |
| 323 } | |
| 324 } | |
| 325 } else { | |
| 326 if (*pattern == *str) { | |
| 327 didMatch = TRUE; | |
| 328 if (*pattern) | |
| 329 pattern++; | |
| 330 if (*str) | |
| 331 str++; | |
| 332 } else { | |
| 333 if (tmpPattern) { | |
| 334 didMatch = TRUE; | |
| 335 isAnyMode = TRUE; | |
| 336 pattern = tmpPattern; | |
| 337 } | |
| 338 } | |
| 339 } | |
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340 |
| 10 | 341 if (!*str && !*pattern) |
| 342 isEnd = TRUE; | |
| 343 break; | |
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344 |
| 10 | 345 } /* switch */ |
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346 |
| 10 | 347 } while (didMatch && !isEnd); |
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348 |
| 10 | 349 return didMatch; |
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350 } |
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351 |
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352 |
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353 /* Compare a string to a pattern. Case-INSENSITIVE version. |
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354 */ |
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355 BOOL th_strcasematch(char * str, char * pattern) |
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356 { |
| 10 | 357 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
| 358 char *tmpPattern = NULL; | |
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359 |
| 10 | 360 /* Check given pattern and string */ |
| 361 if (str == NULL || pattern == NULL) | |
| 362 return FALSE; | |
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363 |
| 10 | 364 /* Start comparision */ |
| 365 do { | |
| 366 switch (*pattern) { | |
| 367 case '?': | |
| 368 /* Any single character matches */ | |
| 369 if (*str) { | |
| 370 pattern++; | |
| 371 str++; | |
| 372 } else | |
| 373 didMatch = FALSE; | |
| 374 break; | |
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375 |
| 10 | 376 case '*': |
| 377 pattern++; | |
| 378 if (!*pattern || *pattern == '?') | |
| 379 isEnd = TRUE; | |
| 380 isAnyMode = TRUE; | |
| 381 tmpPattern = pattern; | |
| 382 break; | |
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383 |
| 10 | 384 case 0: |
| 385 if (isAnyMode) { | |
| 386 if (*str) | |
| 387 str++; | |
| 388 else | |
| 389 isEnd = TRUE; | |
| 390 } else { | |
| 391 if (*str) { | |
| 392 if (tmpPattern) { | |
| 393 isAnyMode = TRUE; | |
| 394 pattern = tmpPattern; | |
| 395 } else | |
| 396 didMatch = FALSE; | |
| 397 } else | |
| 398 isEnd = TRUE; | |
| 399 } | |
| 400 break; | |
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401 |
| 10 | 402 default: |
| 403 if (isAnyMode) { | |
| 404 if (th_tolower(*pattern) == th_tolower(*str)) { | |
| 405 isAnyMode = FALSE; | |
| 406 } else { | |
| 407 if (*str) | |
| 408 str++; | |
| 409 else | |
| 410 didMatch = FALSE; | |
| 411 } | |
| 412 } else { | |
| 413 if (th_tolower(*pattern) == th_tolower(*str)) { | |
| 414 if (*pattern) | |
| 415 pattern++; | |
| 416 if (*str) | |
| 417 str++; | |
| 418 } else { | |
| 419 if (tmpPattern) { | |
| 420 isAnyMode = TRUE; | |
| 421 pattern = tmpPattern; | |
| 422 } else | |
| 423 didMatch = FALSE; | |
| 424 } | |
| 425 } | |
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426 |
| 10 | 427 if (!*str && !*pattern) |
| 428 isEnd = TRUE; | |
| 429 break; | |
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430 |
| 10 | 431 } /* switch */ |
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432 |
| 10 | 433 } while (didMatch && !isEnd); |
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434 |
| 10 | 435 return didMatch; |
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436 } |
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437 |