Mercurial > hg > th-libs
annotate th_string.c @ 39:0d55592e0e01
Cosmetic cleanups.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Sun, 02 Oct 2011 23:57:09 +0300 |
| parents | cdaa16f99474 |
| children | 8c015ac0c556 |
| 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 |
| 8 | 13 /* strdup with a NULL check |
| 14 */ | |
| 15 char *th_strdup(const char *s) | |
| 16 { | |
| 10 | 17 char *res; |
| 18 if (s == NULL) | |
| 19 return NULL; | |
| 20 | |
| 21 if ((res = th_malloc(strlen(s) + 1)) == NULL) | |
| 22 return NULL; | |
| 23 | |
| 24 strcpy(res, s); | |
| 25 return res; | |
| 8 | 26 } |
| 27 | |
| 28 | |
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29 char *th_strncpy(char * dst, const char * src, const size_t n) |
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30 { |
| 10 | 31 const char *s = src; |
| 32 char *d = dst; | |
| 33 size_t i; | |
| 34 assert(src != NULL); | |
| 35 assert(dst != NULL); | |
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36 |
| 10 | 37 /* Copy to the destination */ |
| 38 i = n; | |
| 39 | 39 while (*s && i > 0) |
| 40 { | |
| 10 | 41 *(d++) = *(s++); |
| 42 i--; | |
| 43 } | |
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44 |
| 10 | 45 /* Fill rest of space with zeros */ |
| 39 | 46 while (i > 0) |
| 47 { | |
| 10 | 48 *(d++) = 0; |
| 49 i--; | |
| 50 } | |
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51 |
| 10 | 52 /* Ensure that last is always zero */ |
| 53 dst[n - 1] = 0; | |
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54 |
| 10 | 55 return dst; |
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56 } |
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57 |
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58 |
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59 /* Simulate a sprintf() that allocates memory |
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60 */ |
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61 char * th_strdup_vprintf(const char *fmt, va_list args) |
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62 { |
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63 int size = 64; |
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64 char *buf, *nbuf = NULL; |
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65 |
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66 if ((buf = th_malloc(size)) == NULL) |
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67 return NULL; |
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68 |
| 39 | 69 while (1) |
| 70 { | |
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71 int n; |
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72 va_list ap; |
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73 va_copy(ap, args); |
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74 n = vsnprintf(buf, size, fmt, ap); |
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75 va_end(ap); |
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76 |
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77 if (n > -1 && n < size) |
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78 return buf; |
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79 if (n > -1) |
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80 size = n + 1; |
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81 else |
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82 size *= 2; |
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83 |
| 39 | 84 if ((nbuf = th_realloc(nbuf, size)) == NULL) |
| 85 { | |
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86 th_free(buf); |
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87 return NULL; |
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88 } |
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89 |
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90 buf = nbuf; |
| 10 | 91 } |
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92 } |
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93 |
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94 |
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95 char * th_strdup_printf(const char *fmt, ...) |
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96 { |
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97 char *res; |
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98 va_list ap; |
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99 |
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100 va_start(ap, fmt); |
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101 res = th_strdup_vprintf(fmt, ap); |
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102 va_end(ap); |
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103 |
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104 return res; |
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105 } |
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106 |
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107 |
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108 void th_pstr_vprintf(char **buf, const char *fmt, va_list ap) |
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109 { |
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110 char *tmp = th_strdup_vprintf(fmt, ap); |
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111 th_free(*buf); |
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112 *buf = tmp; |
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113 } |
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114 |
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115 |
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116 void th_pstr_printf(char **buf, const char *fmt, ...) |
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117 { |
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118 char *tmp; |
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119 va_list ap; |
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120 |
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121 va_start(ap, fmt); |
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122 tmp = th_strdup_vprintf(fmt, ap); |
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123 va_end(ap); |
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124 |
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125 th_free(*buf); |
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126 *buf = tmp; |
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127 } |
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128 |
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129 /* Compare two strings ignoring case [strcasecmp, strncasecmp] |
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130 */ |
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131 int th_strcasecmp(const char * str1, const char * str2) |
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132 { |
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133 const char *s1 = str1, *s2 = str2; |
| 10 | 134 assert(str1 != NULL); |
| 135 assert(str2 != NULL); | |
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136 |
| 10 | 137 if (str1 == str2) |
| 138 return 0; | |
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139 |
| 39 | 140 while (*s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) |
| 141 { | |
| 10 | 142 s1++; |
| 143 s2++; | |
| 144 } | |
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145 |
| 10 | 146 return (th_tolower(*s1) - th_tolower(*s2)); |
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147 } |
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148 |
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149 |
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150 int th_strncasecmp(const char * str1, const char * str2, size_t n) |
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151 { |
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152 const char *s1 = str1, *s2 = str2; |
| 10 | 153 assert(str1 != NULL); |
| 154 assert(str2 != NULL); | |
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155 |
| 10 | 156 if (str1 == str2) |
| 157 return 0; | |
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158 |
| 39 | 159 while (n > 0 && *s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) |
| 160 { | |
| 10 | 161 s1++; |
| 162 s2++; | |
| 163 n--; | |
| 164 } | |
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165 |
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166 return n > 0 ? (th_tolower(*s1) - th_tolower(*s2)) : 0; |
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167 } |
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168 |
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169 |
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170 /* Remove all occurences of control characters, in-place. |
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171 * Resulting string is always shorter or same length than original. |
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172 */ |
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173 void th_strip_ctrlchars(char * str) |
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174 { |
| 10 | 175 char *i, *j; |
| 176 assert(str != NULL); | |
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177 |
| 10 | 178 i = str; |
| 179 j = str; | |
| 39 | 180 while (*i) |
| 181 { | |
| 10 | 182 if (!th_iscntrl(*i)) |
| 183 *(j++) = *i; | |
| 184 i++; | |
| 185 } | |
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186 |
| 10 | 187 *j = 0; |
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188 } |
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189 |
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190 |
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191 /* Copy a given string over in *result. |
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192 */ |
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193 int th_pstrcpy(char ** result, const char * str) |
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194 { |
| 10 | 195 assert(result != NULL); |
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196 |
| 10 | 197 if (str == NULL) |
| 198 return -1; | |
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199 |
| 10 | 200 th_free(*result); |
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201 if ((*result = th_malloc(strlen(str) + 1)) == NULL) |
| 10 | 202 return -2; |
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203 |
| 10 | 204 strcpy(*result, str); |
| 205 return 0; | |
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206 } |
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207 |
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208 |
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209 /* Concatenates a given string into string pointed by *result. |
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210 */ |
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211 int th_pstrcat(char ** result, const char * str) |
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212 { |
| 10 | 213 assert(result != NULL); |
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214 |
| 10 | 215 if (str == NULL) |
| 216 return -1; | |
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217 |
| 39 | 218 if (*result != NULL) |
| 219 { | |
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220 *result = th_realloc(*result, strlen(*result) + strlen(str) + 1); |
| 10 | 221 if (*result == NULL) |
| 222 return -1; | |
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223 |
| 10 | 224 strcat(*result, str); |
| 39 | 225 } |
| 226 else | |
| 227 { | |
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228 *result = th_malloc(strlen(str) + 1); |
| 10 | 229 if (*result == NULL) |
| 230 return -1; | |
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231 |
| 10 | 232 strcpy(*result, str); |
| 233 } | |
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234 |
| 10 | 235 return 0; |
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236 } |
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237 |
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238 |
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239 /* Find next non-whitespace character in string. |
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240 * Updates iPos into the position of such character and |
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241 * returns pointer to the string. |
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242 */ |
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243 const char *th_findnext(const char * str, size_t * pos) |
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244 { |
| 10 | 245 assert(str != NULL); |
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246 |
| 10 | 247 /* Terminating NULL-character is not whitespace! */ |
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248 while (th_isspace(str[*pos])) |
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249 (*pos)++; |
| 39 | 250 |
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251 return &str[*pos]; |
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252 } |
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253 |
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254 |
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255 /* Find next sep-character from string |
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256 */ |
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257 const char *th_findsep(const char * str, size_t * pos, char sep) |
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258 { |
| 10 | 259 assert(str != NULL); |
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260 |
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261 while (str[*pos] && str[*pos] != sep) |
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262 (*pos)++; |
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263 |
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264 return &str[*pos]; |
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265 } |
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266 |
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267 |
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268 /* Find next sep- or whitespace from string |
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269 */ |
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270 const char *th_findseporspace(const char * str, size_t * pos, char sep) |
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271 { |
| 10 | 272 assert(str != NULL); |
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273 |
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274 while (!th_isspace(str[*pos]) && str[*pos] != sep) |
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275 (*pos)++; |
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276 |
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277 return &str[*pos]; |
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278 } |
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279 |
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280 |
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281 /* Compare a string to a pattern. Case-SENSITIVE version. |
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282 * The matching pattern can consist of any normal characters plus |
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283 * wildcards ? and *. "?" matches any character and "*" matches |
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284 * any number of characters. |
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285 */ |
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286 BOOL th_strmatch(const char * str, const char * pattern) |
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287 { |
| 10 | 288 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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289 const char *tmpPattern = NULL; |
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290 |
| 10 | 291 /* Check given pattern and string */ |
| 292 if (str == NULL || pattern == NULL) | |
| 293 return FALSE; | |
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294 |
| 10 | 295 /* Start comparision */ |
| 296 do { | |
| 297 didMatch = FALSE; | |
| 39 | 298 switch (*pattern) |
| 299 { | |
| 10 | 300 case '?': |
| 301 /* Any single character matches */ | |
| 39 | 302 if (*str) |
| 303 { | |
| 10 | 304 didMatch = TRUE; |
| 305 pattern++; | |
| 306 str++; | |
| 307 } | |
| 308 break; | |
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309 |
| 10 | 310 case '*': |
| 311 didMatch = TRUE; | |
| 312 pattern++; | |
| 313 if (!*pattern) | |
| 314 isEnd = TRUE; | |
| 315 isAnyMode = TRUE; | |
| 316 tmpPattern = pattern; | |
| 317 break; | |
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318 |
| 10 | 319 case 0: |
| 39 | 320 if (isAnyMode) |
| 321 { | |
| 10 | 322 if (*str) |
| 323 str++; | |
| 324 else | |
| 325 isEnd = TRUE; | |
| 39 | 326 } |
| 327 else | |
| 328 { | |
| 329 if (*str) | |
| 330 { | |
| 331 if (tmpPattern) | |
| 332 { | |
| 10 | 333 isAnyMode = TRUE; |
| 334 pattern = tmpPattern; | |
| 39 | 335 } |
| 336 else | |
| 10 | 337 didMatch = FALSE; |
| 338 } else | |
| 339 isEnd = TRUE; | |
| 340 } | |
| 341 break; | |
| 342 default: | |
| 39 | 343 if (isAnyMode) |
| 344 { | |
| 345 if (*pattern == *str) | |
| 346 { | |
| 10 | 347 isAnyMode = FALSE; |
| 348 didMatch = TRUE; | |
| 39 | 349 } |
| 350 else | |
| 351 { | |
| 352 if (*str) | |
| 353 { | |
| 10 | 354 didMatch = TRUE; |
| 355 str++; | |
| 356 } | |
| 357 } | |
| 39 | 358 } |
| 359 else | |
| 360 { | |
| 361 if (*pattern == *str) | |
| 362 { | |
| 10 | 363 didMatch = TRUE; |
| 364 if (*pattern) | |
| 365 pattern++; | |
| 366 if (*str) | |
| 367 str++; | |
| 39 | 368 } |
| 369 else | |
| 370 { | |
| 371 if (tmpPattern) | |
| 372 { | |
| 10 | 373 didMatch = TRUE; |
| 374 isAnyMode = TRUE; | |
| 375 pattern = tmpPattern; | |
| 376 } | |
| 377 } | |
| 378 } | |
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379 |
| 10 | 380 if (!*str && !*pattern) |
| 381 isEnd = TRUE; | |
| 382 break; | |
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383 |
| 10 | 384 } /* switch */ |
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385 |
| 10 | 386 } while (didMatch && !isEnd); |
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387 |
| 10 | 388 return didMatch; |
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389 } |
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390 |
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391 |
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392 /* Compare a string to a pattern. Case-INSENSITIVE version. |
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393 */ |
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394 BOOL th_strcasematch(const char * str, const char * pattern) |
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395 { |
| 10 | 396 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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397 const char *tmpPattern = NULL; |
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398 |
| 10 | 399 /* Check given pattern and string */ |
| 400 if (str == NULL || pattern == NULL) | |
| 401 return FALSE; | |
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402 |
| 10 | 403 /* Start comparision */ |
| 404 do { | |
| 405 switch (*pattern) { | |
| 406 case '?': | |
| 407 /* Any single character matches */ | |
| 39 | 408 if (*str) |
| 409 { | |
| 10 | 410 pattern++; |
| 411 str++; | |
| 412 } else | |
| 413 didMatch = FALSE; | |
| 414 break; | |
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415 |
| 10 | 416 case '*': |
| 417 pattern++; | |
| 418 if (!*pattern || *pattern == '?') | |
| 419 isEnd = TRUE; | |
| 420 isAnyMode = TRUE; | |
| 421 tmpPattern = pattern; | |
| 422 break; | |
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423 |
| 10 | 424 case 0: |
| 39 | 425 if (isAnyMode) |
| 426 { | |
| 10 | 427 if (*str) |
| 428 str++; | |
| 429 else | |
| 430 isEnd = TRUE; | |
| 39 | 431 } |
| 432 else | |
| 433 { | |
| 434 if (*str) | |
| 435 { | |
| 436 if (tmpPattern) | |
| 437 { | |
| 10 | 438 isAnyMode = TRUE; |
| 439 pattern = tmpPattern; | |
| 39 | 440 } |
| 441 else | |
| 10 | 442 didMatch = FALSE; |
| 443 } else | |
| 444 isEnd = TRUE; | |
| 445 } | |
| 446 break; | |
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447 |
| 10 | 448 default: |
| 39 | 449 if (isAnyMode) |
| 450 { | |
| 451 if (th_tolower(*pattern) == th_tolower(*str)) | |
| 452 { | |
| 10 | 453 isAnyMode = FALSE; |
| 39 | 454 } |
| 455 else | |
| 456 { | |
| 10 | 457 if (*str) |
| 458 str++; | |
| 459 else | |
| 460 didMatch = FALSE; | |
| 461 } | |
| 39 | 462 } |
| 463 else | |
| 464 { | |
| 465 if (th_tolower(*pattern) == th_tolower(*str)) | |
| 466 { | |
| 10 | 467 if (*pattern) |
| 468 pattern++; | |
| 469 if (*str) | |
| 470 str++; | |
| 39 | 471 } |
| 472 else | |
| 473 { | |
| 474 if (tmpPattern) | |
| 475 { | |
| 10 | 476 isAnyMode = TRUE; |
| 477 pattern = tmpPattern; | |
| 39 | 478 } |
| 479 else | |
| 10 | 480 didMatch = FALSE; |
| 481 } | |
| 482 } | |
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483 |
| 10 | 484 if (!*str && !*pattern) |
| 485 isEnd = TRUE; | |
| 39 | 486 |
| 10 | 487 break; |
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488 |
| 10 | 489 } /* switch */ |
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490 |
| 10 | 491 } while (didMatch && !isEnd); |
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492 |
| 10 | 493 return didMatch; |
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494 } |
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495 |
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496 |
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497 int th_get_hex_triplet(const char *str) |
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498 { |
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499 const char *p = str; |
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500 int len, val = 0; |
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501 |
| 39 | 502 for (len = 0; *p && len < 6; p++, len++) |
| 503 { | |
| 504 if (*p >= '0' && *p <= '9') | |
| 505 { | |
| 506 val *= 16; | |
| 507 val += (*p - '0'); | |
| 508 } | |
| 509 else if (*p >= 'A' && *p <= 'F') | |
| 510 { | |
| 511 val *= 16; | |
| 512 val += (*p - 'A') + 10; | |
| 513 } | |
| 514 else if (*p >= 'a' && *p <= 'f') | |
| 515 { | |
| 516 val *= 16; | |
| 517 val += (*p - 'a') + 10; | |
| 518 } | |
| 519 else | |
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520 return -1; |
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521 } |
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522 |
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523 return (len == 6) ? val : -1; |
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524 } |
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525 |
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526 |
| 35 | 527 BOOL th_growbuf(char **buf, size_t *bufsize, size_t *len, size_t grow) |
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528 { |
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529 if (*buf == NULL) |
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530 *bufsize = *len = 0; |
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531 |
| 39 | 532 if (*buf == NULL || *len + grow >= *bufsize) |
| 533 { | |
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534 *bufsize += grow + TH_BUFGROW; |
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535 *buf = (char *) th_realloc(*buf, *bufsize); |
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536 if (*buf == NULL) |
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537 return FALSE; |
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538 } |
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539 return TRUE; |
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540 } |
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541 |
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542 |
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543 BOOL th_vputch(char **buf, size_t *bufsize, size_t *len, const char ch) |
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544 { |
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545 if (!th_growbuf(buf, bufsize, len, 1)) |
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546 return FALSE; |
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547 |
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548 (*buf)[*len] = ch; |
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549 (*len)++; |
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550 |
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551 return TRUE; |
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552 } |
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553 |
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554 |
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555 BOOL th_vputs(char **buf, size_t *bufsize, size_t *len, const char *str) |
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556 { |
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557 size_t slen; |
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558 if (str == NULL) |
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559 return FALSE; |
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560 |
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561 slen = strlen(str); |
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562 if (!th_growbuf(buf, bufsize, len, slen)) |
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563 return FALSE; |
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564 |
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565 strcpy(*buf + *len, str); |
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566 (*len) += slen; |
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567 |
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568 return TRUE; |
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569 } |
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570 |