Mercurial > hg > th-libs
annotate th_string.c @ 87:b6f3486c4d6c
Bump copyrights.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Sat, 17 May 2014 22:39:06 +0300 |
parents | 3e5c0615125c |
children | d3d3cd41a95a |
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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 |
87 | 4 * (C) Copyright 2002-2014 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 #include "th_util.h" |
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9 #include "th_string.h" |
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10 |
80 | 11 |
12 /* Implementation of strdup() with a NULL check | |
8 | 13 */ |
14 char *th_strdup(const char *s) | |
15 { | |
10 | 16 char *res; |
17 if (s == NULL) | |
18 return NULL; | |
44 | 19 |
10 | 20 if ((res = th_malloc(strlen(s) + 1)) == NULL) |
21 return NULL; | |
44 | 22 |
10 | 23 strcpy(res, s); |
24 return res; | |
8 | 25 } |
26 | |
27 | |
81 | 28 /* Implementation of strndup() with NULL check |
29 */ | |
30 char *th_strndup(const char *s, const size_t n) | |
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31 { |
81 | 32 char *res; |
33 size_t len; | |
79 | 34 |
81 | 35 if (s == NULL) |
36 return NULL; | |
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37 |
81 | 38 len = strlen(s); |
39 if (len > n) | |
40 len = n; | |
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41 |
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42 if ((res = th_malloc(len + 1)) == NULL) |
81 | 43 return NULL; |
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44 |
81 | 45 memcpy(res, s, len); |
46 res[len] = 0; | |
47 | |
48 return res; | |
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49 } |
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50 |
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51 |
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52 /* Simulate a sprintf() that allocates memory |
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53 */ |
43 | 54 char *th_strdup_vprintf(const char *fmt, va_list args) |
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55 { |
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56 int size = 64; |
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57 char *buf; |
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58 |
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59 if ((buf = th_malloc(size)) == NULL) |
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60 return NULL; |
44 | 61 |
39 | 62 while (1) |
63 { | |
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64 int n; |
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65 va_list ap; |
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66 va_copy(ap, args); |
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67 n = vsnprintf(buf, size, fmt, ap); |
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68 va_end(ap); |
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69 |
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70 if (n > -1 && n < size) |
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71 return buf; |
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72 if (n > -1) |
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73 size = n + 1; |
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74 else |
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75 size *= 2; |
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76 |
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77 if ((buf = th_realloc(buf, size)) == NULL) |
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78 return NULL; |
10 | 79 } |
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80 } |
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81 |
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82 |
43 | 83 char *th_strdup_printf(const char *fmt, ...) |
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84 { |
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85 char *res; |
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86 va_list ap; |
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87 |
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88 va_start(ap, fmt); |
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89 res = th_strdup_vprintf(fmt, ap); |
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90 va_end(ap); |
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91 |
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92 return res; |
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93 } |
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94 |
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95 |
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96 void th_pstr_vprintf(char **buf, const char *fmt, va_list ap) |
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97 { |
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98 char *tmp = th_strdup_vprintf(fmt, ap); |
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99 th_free(*buf); |
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100 *buf = tmp; |
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101 } |
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102 |
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103 |
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104 void th_pstr_printf(char **buf, const char *fmt, ...) |
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105 { |
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106 char *tmp; |
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107 va_list ap; |
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108 |
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109 va_start(ap, fmt); |
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110 tmp = th_strdup_vprintf(fmt, ap); |
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111 va_end(ap); |
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112 |
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113 th_free(*buf); |
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114 *buf = tmp; |
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115 } |
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116 |
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117 /* Compare two strings ignoring case [strcasecmp, strncasecmp] |
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118 */ |
43 | 119 int th_strcasecmp(const char *str1, const char *str2) |
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120 { |
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121 const char *s1 = str1, *s2 = str2; |
10 | 122 assert(str1 != NULL); |
123 assert(str2 != NULL); | |
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124 |
10 | 125 if (str1 == str2) |
126 return 0; | |
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127 |
39 | 128 while (*s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) |
129 { | |
10 | 130 s1++; |
131 s2++; | |
132 } | |
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133 |
10 | 134 return (th_tolower(*s1) - th_tolower(*s2)); |
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135 } |
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136 |
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137 |
43 | 138 int th_strncasecmp(const char *str1, const char *str2, size_t n) |
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139 { |
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140 const char *s1 = str1, *s2 = str2; |
10 | 141 assert(str1 != NULL); |
142 assert(str2 != NULL); | |
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143 |
10 | 144 if (str1 == str2) |
145 return 0; | |
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146 |
39 | 147 while (n > 0 && *s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) |
148 { | |
10 | 149 s1++; |
150 s2++; | |
151 n--; | |
152 } | |
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153 |
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154 return n > 0 ? (th_tolower(*s1) - th_tolower(*s2)) : 0; |
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155 } |
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156 |
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157 |
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158 /* Remove all occurences of control characters, in-place. |
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159 * Resulting string is always shorter or same length than original. |
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160 */ |
43 | 161 void th_strip_ctrlchars(char *str) |
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162 { |
10 | 163 char *i, *j; |
164 assert(str != NULL); | |
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165 |
10 | 166 i = str; |
167 j = str; | |
39 | 168 while (*i) |
169 { | |
10 | 170 if (!th_iscntrl(*i)) |
171 *(j++) = *i; | |
172 i++; | |
173 } | |
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174 |
10 | 175 *j = 0; |
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176 } |
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177 |
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178 |
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179 /* Copy a given string over in *result. |
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180 */ |
43 | 181 int th_pstrcpy(char **result, const char *str) |
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182 { |
10 | 183 assert(result != NULL); |
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184 |
10 | 185 if (str == NULL) |
186 return -1; | |
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187 |
10 | 188 th_free(*result); |
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189 if ((*result = th_malloc(strlen(str) + 1)) == NULL) |
10 | 190 return -2; |
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191 |
10 | 192 strcpy(*result, str); |
193 return 0; | |
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194 } |
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195 |
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196 |
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197 /* Concatenates a given string into string pointed by *result. |
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198 */ |
43 | 199 int th_pstrcat(char **result, const char *str) |
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200 { |
10 | 201 assert(result != NULL); |
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202 |
10 | 203 if (str == NULL) |
204 return -1; | |
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205 |
39 | 206 if (*result != NULL) |
207 { | |
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208 *result = th_realloc(*result, strlen(*result) + strlen(str) + 1); |
10 | 209 if (*result == NULL) |
210 return -1; | |
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211 |
10 | 212 strcat(*result, str); |
39 | 213 } |
214 else | |
215 { | |
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216 *result = th_malloc(strlen(str) + 1); |
10 | 217 if (*result == NULL) |
218 return -1; | |
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219 |
10 | 220 strcpy(*result, str); |
221 } | |
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222 |
10 | 223 return 0; |
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224 } |
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225 |
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226 |
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227 /* Find next non-whitespace character in string. |
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228 * Updates iPos into the position of such character and |
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229 * returns pointer to the string. |
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230 */ |
43 | 231 const char *th_findnext(const char *str, size_t *pos) |
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232 { |
10 | 233 assert(str != NULL); |
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234 |
10 | 235 /* Terminating NULL-character is not whitespace! */ |
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236 while (th_isspace(str[*pos])) |
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237 (*pos)++; |
39 | 238 |
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239 return &str[*pos]; |
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240 } |
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241 |
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242 |
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243 /* Find next sep-character from string |
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244 */ |
43 | 245 const char *th_findsep(const char *str, size_t *pos, char sep) |
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246 { |
10 | 247 assert(str != NULL); |
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248 |
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249 while (str[*pos] && str[*pos] != sep) |
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250 (*pos)++; |
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251 |
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252 return &str[*pos]; |
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253 } |
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254 |
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255 |
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256 /* Find next sep- or whitespace from string |
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257 */ |
43 | 258 const char *th_findseporspace(const char *str, size_t *pos, char sep) |
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259 { |
10 | 260 assert(str != NULL); |
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261 |
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262 while (!th_isspace(str[*pos]) && str[*pos] != sep) |
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263 (*pos)++; |
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264 |
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265 return &str[*pos]; |
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266 } |
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267 |
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268 |
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269 /* Compare a string to a pattern. Case-SENSITIVE version. |
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270 * The matching pattern can consist of any normal characters plus |
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271 * wildcards ? and *. "?" matches any character and "*" matches |
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272 * any number of characters. |
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273 */ |
43 | 274 BOOL th_strmatch(const char *str, const char *pattern) |
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275 { |
10 | 276 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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277 const char *tmpPattern = NULL; |
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278 |
10 | 279 /* Check given pattern and string */ |
280 if (str == NULL || pattern == NULL) | |
281 return FALSE; | |
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282 |
10 | 283 /* Start comparision */ |
284 do { | |
285 didMatch = FALSE; | |
39 | 286 switch (*pattern) |
287 { | |
10 | 288 case '?': |
289 /* Any single character matches */ | |
39 | 290 if (*str) |
291 { | |
10 | 292 didMatch = TRUE; |
293 pattern++; | |
294 str++; | |
295 } | |
296 break; | |
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297 |
10 | 298 case '*': |
299 didMatch = TRUE; | |
300 pattern++; | |
301 if (!*pattern) | |
302 isEnd = TRUE; | |
303 isAnyMode = TRUE; | |
304 tmpPattern = pattern; | |
305 break; | |
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306 |
10 | 307 case 0: |
39 | 308 if (isAnyMode) |
309 { | |
10 | 310 if (*str) |
311 str++; | |
312 else | |
313 isEnd = TRUE; | |
39 | 314 } |
315 else | |
316 { | |
317 if (*str) | |
318 { | |
319 if (tmpPattern) | |
320 { | |
10 | 321 isAnyMode = TRUE; |
322 pattern = tmpPattern; | |
39 | 323 } |
324 else | |
10 | 325 didMatch = FALSE; |
44 | 326 } |
327 else | |
10 | 328 isEnd = TRUE; |
329 } | |
330 break; | |
331 default: | |
39 | 332 if (isAnyMode) |
333 { | |
334 if (*pattern == *str) | |
335 { | |
10 | 336 isAnyMode = FALSE; |
337 didMatch = TRUE; | |
39 | 338 } |
339 else | |
340 { | |
341 if (*str) | |
342 { | |
10 | 343 didMatch = TRUE; |
344 str++; | |
345 } | |
346 } | |
39 | 347 } |
348 else | |
349 { | |
350 if (*pattern == *str) | |
351 { | |
10 | 352 didMatch = TRUE; |
353 if (*pattern) | |
354 pattern++; | |
355 if (*str) | |
356 str++; | |
39 | 357 } |
358 else | |
359 { | |
360 if (tmpPattern) | |
361 { | |
10 | 362 didMatch = TRUE; |
363 isAnyMode = TRUE; | |
364 pattern = tmpPattern; | |
365 } | |
366 } | |
367 } | |
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368 |
10 | 369 if (!*str && !*pattern) |
370 isEnd = TRUE; | |
371 break; | |
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372 |
10 | 373 } /* switch */ |
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374 |
10 | 375 } while (didMatch && !isEnd); |
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376 |
10 | 377 return didMatch; |
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378 } |
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379 |
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380 |
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381 /* Compare a string to a pattern. Case-INSENSITIVE version. |
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382 */ |
43 | 383 BOOL th_strcasematch(const char *str, const char *pattern) |
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384 { |
10 | 385 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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386 const char *tmpPattern = NULL; |
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387 |
10 | 388 /* Check given pattern and string */ |
389 if (str == NULL || pattern == NULL) | |
390 return FALSE; | |
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391 |
10 | 392 /* Start comparision */ |
393 do { | |
394 switch (*pattern) { | |
395 case '?': | |
396 /* Any single character matches */ | |
39 | 397 if (*str) |
398 { | |
10 | 399 pattern++; |
400 str++; | |
44 | 401 } |
402 else | |
10 | 403 didMatch = FALSE; |
404 break; | |
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405 |
10 | 406 case '*': |
407 pattern++; | |
408 if (!*pattern || *pattern == '?') | |
409 isEnd = TRUE; | |
410 isAnyMode = TRUE; | |
411 tmpPattern = pattern; | |
412 break; | |
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413 |
10 | 414 case 0: |
39 | 415 if (isAnyMode) |
416 { | |
10 | 417 if (*str) |
418 str++; | |
419 else | |
420 isEnd = TRUE; | |
39 | 421 } |
422 else | |
423 { | |
424 if (*str) | |
425 { | |
426 if (tmpPattern) | |
427 { | |
10 | 428 isAnyMode = TRUE; |
429 pattern = tmpPattern; | |
39 | 430 } |
431 else | |
10 | 432 didMatch = FALSE; |
44 | 433 } |
434 else | |
10 | 435 isEnd = TRUE; |
436 } | |
437 break; | |
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438 |
10 | 439 default: |
39 | 440 if (isAnyMode) |
441 { | |
442 if (th_tolower(*pattern) == th_tolower(*str)) | |
443 { | |
10 | 444 isAnyMode = FALSE; |
39 | 445 } |
446 else | |
447 { | |
10 | 448 if (*str) |
449 str++; | |
450 else | |
451 didMatch = FALSE; | |
452 } | |
39 | 453 } |
454 else | |
455 { | |
456 if (th_tolower(*pattern) == th_tolower(*str)) | |
457 { | |
10 | 458 if (*pattern) |
459 pattern++; | |
460 if (*str) | |
461 str++; | |
39 | 462 } |
463 else | |
464 { | |
465 if (tmpPattern) | |
466 { | |
10 | 467 isAnyMode = TRUE; |
468 pattern = tmpPattern; | |
39 | 469 } |
470 else | |
10 | 471 didMatch = FALSE; |
472 } | |
473 } | |
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474 |
10 | 475 if (!*str && !*pattern) |
476 isEnd = TRUE; | |
39 | 477 |
10 | 478 break; |
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479 |
10 | 480 } /* switch */ |
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481 |
10 | 482 } while (didMatch && !isEnd); |
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483 |
10 | 484 return didMatch; |
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485 } |
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486 |
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487 |
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488 int th_get_hex_triplet(const char *str) |
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489 { |
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490 const char *p = str; |
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491 int len, val = 0; |
44 | 492 |
39 | 493 for (len = 0; *p && len < 6; p++, len++) |
494 { | |
495 if (*p >= '0' && *p <= '9') | |
496 { | |
497 val *= 16; | |
498 val += (*p - '0'); | |
499 } | |
500 else if (*p >= 'A' && *p <= 'F') | |
501 { | |
502 val *= 16; | |
503 val += (*p - 'A') + 10; | |
504 } | |
505 else if (*p >= 'a' && *p <= 'f') | |
506 { | |
507 val *= 16; | |
508 val += (*p - 'a') + 10; | |
509 } | |
510 else | |
14
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511 return -1; |
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512 } |
44 | 513 |
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514 return (len == 6) ? val : -1; |
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515 } |
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Various cleanups, additions and removals.
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516 |
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517 |
35 | 518 BOOL th_growbuf(char **buf, size_t *bufsize, size_t *len, size_t grow) |
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519 { |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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520 if (*buf == NULL) |
31
a3ad77382c64
Fix an annoying bug in th_growbuf().
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521 *bufsize = *len = 0; |
44 | 522 |
39 | 523 if (*buf == NULL || *len + grow >= *bufsize) |
524 { | |
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525 *bufsize += grow + TH_BUFGROW; |
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526 *buf = (char *) th_realloc(*buf, *bufsize); |
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527 if (*buf == NULL) |
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528 return FALSE; |
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529 } |
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530 return TRUE; |
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531 } |
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532 |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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533 |
29
04cfdefc3253
th_vputs() and th_vputch() now return a boolean value, TRUE if operation was successful, FALSE if it failed. If result was FALSE, the buffer pointer may now be NULL.
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534 BOOL th_vputch(char **buf, size_t *bufsize, size_t *len, const char ch) |
21
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535 { |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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536 if (!th_growbuf(buf, bufsize, len, 1)) |
29
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537 return FALSE; |
44 | 538 |
21
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539 (*buf)[*len] = ch; |
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540 (*len)++; |
29
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541 |
04cfdefc3253
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542 return TRUE; |
21
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543 } |
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544 |
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545 |
29
04cfdefc3253
th_vputs() and th_vputch() now return a boolean value, TRUE if operation was successful, FALSE if it failed. If result was FALSE, the buffer pointer may now be NULL.
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546 BOOL th_vputs(char **buf, size_t *bufsize, size_t *len, const char *str) |
21
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547 { |
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548 size_t slen; |
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549 if (str == NULL) |
29
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550 return FALSE; |
44 | 551 |
21
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552 slen = strlen(str); |
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553 if (!th_growbuf(buf, bufsize, len, slen)) |
29
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554 return FALSE; |
21
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555 |
32
7e0a2a125830
Use strcpy() instead of strcat() in th_vputs().
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556 strcpy(*buf + *len, str); |
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557 (*len) += slen; |
44 | 558 |
29
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559 return TRUE; |
21
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560 } |