Mercurial > hg > th-libs
annotate th_string.c @ 88:d3d3cd41a95a
Slight adjustments.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Sat, 17 May 2014 22:39:27 +0300 |
parents | b6f3486c4d6c |
children | 30690f5c4cae |
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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 { |
88 | 56 int size = strlen(fmt); |
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57 char *buf; |
88 | 58 if (size < 64) |
59 size = 64; | |
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60 |
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61 if ((buf = th_malloc(size)) == NULL) |
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62 return NULL; |
44 | 63 |
39 | 64 while (1) |
65 { | |
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66 int n; |
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67 va_list ap; |
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68 va_copy(ap, args); |
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69 n = vsnprintf(buf, size, fmt, ap); |
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70 va_end(ap); |
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71 |
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72 if (n > -1 && n < size) |
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73 return buf; |
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74 if (n > -1) |
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75 size = n + 1; |
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76 else |
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77 size *= 2; |
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78 |
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79 if ((buf = th_realloc(buf, size)) == NULL) |
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80 return NULL; |
10 | 81 } |
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82 } |
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83 |
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84 |
43 | 85 char *th_strdup_printf(const char *fmt, ...) |
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86 { |
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87 char *res; |
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88 va_list ap; |
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89 |
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90 va_start(ap, fmt); |
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91 res = th_strdup_vprintf(fmt, ap); |
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92 va_end(ap); |
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93 |
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94 return res; |
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95 } |
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96 |
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97 |
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98 void th_pstr_vprintf(char **buf, const char *fmt, va_list ap) |
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99 { |
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100 char *tmp = th_strdup_vprintf(fmt, ap); |
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101 th_free(*buf); |
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102 *buf = tmp; |
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103 } |
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104 |
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105 |
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106 void th_pstr_printf(char **buf, const char *fmt, ...) |
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107 { |
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108 char *tmp; |
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109 va_list ap; |
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110 |
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111 va_start(ap, fmt); |
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112 tmp = th_strdup_vprintf(fmt, ap); |
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113 va_end(ap); |
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114 |
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115 th_free(*buf); |
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116 *buf = tmp; |
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117 } |
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118 |
88 | 119 |
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120 /* Compare two strings ignoring case [strcasecmp, strncasecmp] |
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121 */ |
43 | 122 int th_strcasecmp(const char *str1, const char *str2) |
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123 { |
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124 const char *s1 = str1, *s2 = str2; |
10 | 125 assert(str1 != NULL); |
126 assert(str2 != NULL); | |
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127 |
10 | 128 if (str1 == str2) |
129 return 0; | |
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130 |
39 | 131 while (*s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) |
132 { | |
10 | 133 s1++; |
134 s2++; | |
135 } | |
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136 |
88 | 137 return th_tolower(*s1) - th_tolower(*s2); |
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138 } |
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139 |
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140 |
43 | 141 int th_strncasecmp(const char *str1, const char *str2, size_t n) |
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142 { |
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143 const char *s1 = str1, *s2 = str2; |
10 | 144 assert(str1 != NULL); |
145 assert(str2 != NULL); | |
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146 |
10 | 147 if (str1 == str2) |
148 return 0; | |
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149 |
39 | 150 while (n > 0 && *s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) |
151 { | |
10 | 152 s1++; |
153 s2++; | |
154 n--; | |
155 } | |
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156 |
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157 return n > 0 ? (th_tolower(*s1) - th_tolower(*s2)) : 0; |
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158 } |
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159 |
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160 |
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161 /* Remove all occurences of control characters, in-place. |
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162 * Resulting string is always shorter or same length than original. |
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163 */ |
43 | 164 void th_strip_ctrlchars(char *str) |
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165 { |
10 | 166 char *i, *j; |
167 assert(str != NULL); | |
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168 |
10 | 169 i = str; |
170 j = str; | |
39 | 171 while (*i) |
172 { | |
10 | 173 if (!th_iscntrl(*i)) |
174 *(j++) = *i; | |
175 i++; | |
176 } | |
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177 |
10 | 178 *j = 0; |
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179 } |
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180 |
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181 |
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182 /* Copy a given string over in *result. |
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183 */ |
43 | 184 int th_pstrcpy(char **result, const char *str) |
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185 { |
10 | 186 assert(result != NULL); |
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187 |
10 | 188 if (str == NULL) |
189 return -1; | |
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190 |
10 | 191 th_free(*result); |
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192 if ((*result = th_malloc(strlen(str) + 1)) == NULL) |
10 | 193 return -2; |
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194 |
10 | 195 strcpy(*result, str); |
196 return 0; | |
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197 } |
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198 |
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199 |
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200 /* Concatenates a given string into string pointed by *result. |
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201 */ |
43 | 202 int th_pstrcat(char **result, const char *str) |
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203 { |
10 | 204 assert(result != NULL); |
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205 |
10 | 206 if (str == NULL) |
207 return -1; | |
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208 |
39 | 209 if (*result != NULL) |
210 { | |
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211 *result = th_realloc(*result, strlen(*result) + strlen(str) + 1); |
10 | 212 if (*result == NULL) |
213 return -1; | |
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214 |
10 | 215 strcat(*result, str); |
39 | 216 } |
217 else | |
218 { | |
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219 *result = th_malloc(strlen(str) + 1); |
10 | 220 if (*result == NULL) |
221 return -1; | |
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222 |
10 | 223 strcpy(*result, str); |
224 } | |
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225 |
10 | 226 return 0; |
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227 } |
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228 |
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229 |
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230 /* Find next non-whitespace character in string. |
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231 * Updates iPos into the position of such character and |
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232 * returns pointer to the string. |
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233 */ |
43 | 234 const char *th_findnext(const char *str, size_t *pos) |
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235 { |
10 | 236 assert(str != NULL); |
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237 |
10 | 238 /* Terminating NULL-character is not whitespace! */ |
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239 while (th_isspace(str[*pos])) |
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240 (*pos)++; |
39 | 241 |
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242 return &str[*pos]; |
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243 } |
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244 |
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245 |
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246 /* Find next sep-character from string |
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247 */ |
43 | 248 const char *th_findsep(const char *str, size_t *pos, char sep) |
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249 { |
10 | 250 assert(str != NULL); |
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251 |
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252 while (str[*pos] && str[*pos] != sep) |
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253 (*pos)++; |
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254 |
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255 return &str[*pos]; |
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256 } |
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257 |
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258 |
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259 /* Find next sep- or whitespace from string |
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260 */ |
43 | 261 const char *th_findseporspace(const char *str, size_t *pos, char sep) |
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262 { |
10 | 263 assert(str != NULL); |
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264 |
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265 while (!th_isspace(str[*pos]) && str[*pos] != sep) |
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266 (*pos)++; |
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267 |
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268 return &str[*pos]; |
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269 } |
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270 |
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271 |
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272 /* Compare a string to a pattern. Case-SENSITIVE version. |
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273 * The matching pattern can consist of any normal characters plus |
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274 * wildcards ? and *. "?" matches any character and "*" matches |
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275 * any number of characters. |
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276 */ |
43 | 277 BOOL th_strmatch(const char *str, const char *pattern) |
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278 { |
10 | 279 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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280 const char *tmpPattern = NULL; |
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281 |
10 | 282 /* Check given pattern and string */ |
283 if (str == NULL || pattern == NULL) | |
284 return FALSE; | |
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285 |
10 | 286 /* Start comparision */ |
287 do { | |
288 didMatch = FALSE; | |
39 | 289 switch (*pattern) |
290 { | |
10 | 291 case '?': |
292 /* Any single character matches */ | |
39 | 293 if (*str) |
294 { | |
10 | 295 didMatch = TRUE; |
296 pattern++; | |
297 str++; | |
298 } | |
299 break; | |
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300 |
10 | 301 case '*': |
302 didMatch = TRUE; | |
303 pattern++; | |
304 if (!*pattern) | |
305 isEnd = TRUE; | |
306 isAnyMode = TRUE; | |
307 tmpPattern = pattern; | |
308 break; | |
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309 |
10 | 310 case 0: |
39 | 311 if (isAnyMode) |
312 { | |
10 | 313 if (*str) |
314 str++; | |
315 else | |
316 isEnd = TRUE; | |
39 | 317 } |
318 else | |
319 { | |
320 if (*str) | |
321 { | |
322 if (tmpPattern) | |
323 { | |
10 | 324 isAnyMode = TRUE; |
325 pattern = tmpPattern; | |
39 | 326 } |
327 else | |
10 | 328 didMatch = FALSE; |
44 | 329 } |
330 else | |
10 | 331 isEnd = TRUE; |
332 } | |
333 break; | |
334 default: | |
39 | 335 if (isAnyMode) |
336 { | |
337 if (*pattern == *str) | |
338 { | |
10 | 339 isAnyMode = FALSE; |
340 didMatch = TRUE; | |
39 | 341 } |
342 else | |
343 { | |
344 if (*str) | |
345 { | |
10 | 346 didMatch = TRUE; |
347 str++; | |
348 } | |
349 } | |
39 | 350 } |
351 else | |
352 { | |
353 if (*pattern == *str) | |
354 { | |
10 | 355 didMatch = TRUE; |
356 if (*pattern) | |
357 pattern++; | |
358 if (*str) | |
359 str++; | |
39 | 360 } |
361 else | |
362 { | |
363 if (tmpPattern) | |
364 { | |
10 | 365 didMatch = TRUE; |
366 isAnyMode = TRUE; | |
367 pattern = tmpPattern; | |
368 } | |
369 } | |
370 } | |
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371 |
10 | 372 if (!*str && !*pattern) |
373 isEnd = TRUE; | |
374 break; | |
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375 |
10 | 376 } /* switch */ |
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377 |
10 | 378 } while (didMatch && !isEnd); |
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379 |
10 | 380 return didMatch; |
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381 } |
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382 |
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383 |
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384 /* Compare a string to a pattern. Case-INSENSITIVE version. |
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385 */ |
43 | 386 BOOL th_strcasematch(const char *str, const char *pattern) |
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387 { |
10 | 388 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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389 const char *tmpPattern = NULL; |
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390 |
10 | 391 /* Check given pattern and string */ |
392 if (str == NULL || pattern == NULL) | |
393 return FALSE; | |
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394 |
10 | 395 /* Start comparision */ |
396 do { | |
397 switch (*pattern) { | |
398 case '?': | |
399 /* Any single character matches */ | |
39 | 400 if (*str) |
401 { | |
10 | 402 pattern++; |
403 str++; | |
44 | 404 } |
405 else | |
10 | 406 didMatch = FALSE; |
407 break; | |
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408 |
10 | 409 case '*': |
410 pattern++; | |
411 if (!*pattern || *pattern == '?') | |
412 isEnd = TRUE; | |
413 isAnyMode = TRUE; | |
414 tmpPattern = pattern; | |
415 break; | |
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416 |
10 | 417 case 0: |
39 | 418 if (isAnyMode) |
419 { | |
10 | 420 if (*str) |
421 str++; | |
422 else | |
423 isEnd = TRUE; | |
39 | 424 } |
425 else | |
426 { | |
427 if (*str) | |
428 { | |
429 if (tmpPattern) | |
430 { | |
10 | 431 isAnyMode = TRUE; |
432 pattern = tmpPattern; | |
39 | 433 } |
434 else | |
10 | 435 didMatch = FALSE; |
44 | 436 } |
437 else | |
10 | 438 isEnd = TRUE; |
439 } | |
440 break; | |
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441 |
10 | 442 default: |
39 | 443 if (isAnyMode) |
444 { | |
445 if (th_tolower(*pattern) == th_tolower(*str)) | |
446 { | |
10 | 447 isAnyMode = FALSE; |
39 | 448 } |
449 else | |
450 { | |
10 | 451 if (*str) |
452 str++; | |
453 else | |
454 didMatch = FALSE; | |
455 } | |
39 | 456 } |
457 else | |
458 { | |
459 if (th_tolower(*pattern) == th_tolower(*str)) | |
460 { | |
10 | 461 if (*pattern) |
462 pattern++; | |
463 if (*str) | |
464 str++; | |
39 | 465 } |
466 else | |
467 { | |
468 if (tmpPattern) | |
469 { | |
10 | 470 isAnyMode = TRUE; |
471 pattern = tmpPattern; | |
39 | 472 } |
473 else | |
10 | 474 didMatch = FALSE; |
475 } | |
476 } | |
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477 |
10 | 478 if (!*str && !*pattern) |
479 isEnd = TRUE; | |
39 | 480 |
10 | 481 break; |
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482 |
10 | 483 } /* switch */ |
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484 |
10 | 485 } while (didMatch && !isEnd); |
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486 |
10 | 487 return didMatch; |
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488 } |
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489 |
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490 |
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491 int th_get_hex_triplet(const char *str) |
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492 { |
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493 const char *p = str; |
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494 int len, val = 0; |
44 | 495 |
39 | 496 for (len = 0; *p && len < 6; p++, len++) |
497 { | |
498 if (*p >= '0' && *p <= '9') | |
499 { | |
500 val *= 16; | |
501 val += (*p - '0'); | |
502 } | |
503 else if (*p >= 'A' && *p <= 'F') | |
504 { | |
505 val *= 16; | |
506 val += (*p - 'A') + 10; | |
507 } | |
508 else if (*p >= 'a' && *p <= 'f') | |
509 { | |
510 val *= 16; | |
511 val += (*p - 'a') + 10; | |
512 } | |
513 else | |
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Various cleanups, additions and removals.
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514 return -1; |
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Various cleanups, additions and removals.
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515 } |
44 | 516 |
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517 return (len == 6) ? val : -1; |
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Various cleanups, additions and removals.
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518 } |
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Various cleanups, additions and removals.
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519 |
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Various cleanups, additions and removals.
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520 |
35 | 521 BOOL th_growbuf(char **buf, size_t *bufsize, size_t *len, size_t grow) |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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522 { |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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523 if (*buf == NULL) |
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a3ad77382c64
Fix an annoying bug in th_growbuf().
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524 *bufsize = *len = 0; |
44 | 525 |
39 | 526 if (*buf == NULL || *len + grow >= *bufsize) |
527 { | |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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528 *bufsize += grow + TH_BUFGROW; |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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529 *buf = (char *) th_realloc(*buf, *bufsize); |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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530 if (*buf == NULL) |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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531 return FALSE; |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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532 } |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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533 return TRUE; |
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534 } |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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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 |
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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537 BOOL th_vputch(char **buf, size_t *bufsize, size_t *len, const char ch) |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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538 { |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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539 if (!th_growbuf(buf, bufsize, len, 1)) |
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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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540 return FALSE; |
44 | 541 |
21
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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542 (*buf)[*len] = ch; |
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543 (*len)++; |
29
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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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544 |
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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545 return TRUE; |
21
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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546 } |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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547 |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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548 |
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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549 BOOL th_vputs(char **buf, size_t *bufsize, size_t *len, const char *str) |
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550 { |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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551 size_t slen; |
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552 if (str == NULL) |
29
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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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553 return FALSE; |
44 | 554 |
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555 slen = strlen(str); |
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556 if (!th_growbuf(buf, bufsize, len, slen)) |
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557 return FALSE; |
21
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558 |
32
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Use strcpy() instead of strcat() in th_vputs().
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559 strcpy(*buf + *len, str); |
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560 (*len) += slen; |
44 | 561 |
29
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562 return TRUE; |
21
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563 } |