Mercurial > hg > th-libs
annotate th_string.c @ 36:760788e21699
Remove some useless assert()s.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Thu, 23 Jun 2011 11:08:59 +0300 |
| parents | e9a3fe655dd9 |
| children | 3986b139bbbd |
| 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; | |
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39 while (*s && i > 0) { |
| 10 | 40 *(d++) = *(s++); |
| 41 i--; | |
| 42 } | |
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43 |
| 10 | 44 /* Fill rest of space with zeros */ |
| 45 while (i > 0) { | |
| 46 *(d++) = 0; | |
| 47 i--; | |
| 48 } | |
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49 |
| 10 | 50 /* Ensure that last is always zero */ |
| 51 dst[n - 1] = 0; | |
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52 |
| 10 | 53 return dst; |
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54 } |
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55 |
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56 |
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57 /* Simulate a sprintf() that allocates memory |
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58 */ |
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59 char * th_strdup_vprintf(const char *fmt, va_list args) |
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60 { |
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61 int size = 100; |
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62 char *buf, *nbuf = NULL; |
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63 |
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64 if ((buf = th_malloc(size)) == NULL) |
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65 return NULL; |
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66 |
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67 while (1) { |
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68 int n = vsnprintf(buf, size, fmt, args); |
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69 if (n > -1 && n < size) |
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70 return buf; |
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71 if (n > -1) |
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72 size = n + 1; |
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73 else |
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74 size *= 2; |
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75 |
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76 if ((nbuf = th_realloc(nbuf, size)) == NULL) { |
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77 th_free(buf); |
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78 return NULL; |
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79 } |
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80 |
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81 buf = nbuf; |
| 10 | 82 } |
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83 } |
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84 |
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85 |
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86 char * th_strdup_printf(const char *fmt, ...) |
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87 { |
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88 char *res; |
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89 va_list ap; |
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90 |
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91 va_start(ap, fmt); |
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92 res = th_strdup_vprintf(fmt, ap); |
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93 va_end(ap); |
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94 |
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95 return res; |
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96 } |
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97 |
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98 |
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99 void th_pstr_vprintf(char **buf, const char *fmt, va_list ap) |
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100 { |
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101 char *tmp = th_strdup_vprintf(fmt, ap); |
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102 th_free(*buf); |
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103 *buf = tmp; |
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104 } |
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105 |
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106 |
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107 void th_pstr_printf(char **buf, const char *fmt, ...) |
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108 { |
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109 char *tmp; |
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110 va_list ap; |
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111 |
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112 va_start(ap, fmt); |
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113 tmp = th_strdup_vprintf(fmt, ap); |
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114 va_end(ap); |
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115 |
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116 th_free(*buf); |
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117 *buf = tmp; |
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118 } |
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119 |
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120 /* Compare two strings ignoring case [strcasecmp, strncasecmp] |
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121 */ |
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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 |
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131 while (*s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) { |
| 10 | 132 s1++; |
| 133 s2++; | |
| 134 } | |
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135 |
| 10 | 136 return (th_tolower(*s1) - th_tolower(*s2)); |
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137 } |
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138 |
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139 |
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140 int th_strncasecmp(const char * str1, const char * str2, size_t n) |
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141 { |
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142 const char *s1 = str1, *s2 = str2; |
| 10 | 143 assert(str1 != NULL); |
| 144 assert(str2 != NULL); | |
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145 |
| 10 | 146 if (str1 == str2) |
| 147 return 0; | |
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148 |
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149 while (n > 0 && *s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) { |
| 10 | 150 s1++; |
| 151 s2++; | |
| 152 n--; | |
| 153 } | |
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154 |
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155 return n > 0 ? (th_tolower(*s1) - th_tolower(*s2)) : 0; |
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156 } |
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157 |
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158 |
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159 /* Remove all occurences of control characters, in-place. |
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160 * Resulting string is always shorter or same length than original. |
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161 */ |
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162 void th_strip_ctrlchars(char * str) |
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163 { |
| 10 | 164 char *i, *j; |
| 165 assert(str != NULL); | |
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166 |
| 10 | 167 i = str; |
| 168 j = str; | |
| 169 while (*i) { | |
| 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 */ |
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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 */ |
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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 |
| 10 | 206 if (*result != NULL) { |
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207 *result = th_realloc(*result, strlen(*result) + strlen(str) + 1); |
| 10 | 208 if (*result == NULL) |
| 209 return -1; | |
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210 |
| 10 | 211 strcat(*result, str); |
| 212 } else { | |
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213 *result = th_malloc(strlen(str) + 1); |
| 10 | 214 if (*result == NULL) |
| 215 return -1; | |
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216 |
| 10 | 217 strcpy(*result, str); |
| 218 } | |
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219 |
| 10 | 220 return 0; |
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221 } |
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222 |
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223 |
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224 /* Find next non-whitespace character in string. |
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225 * Updates iPos into the position of such character and |
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226 * returns pointer to the string. |
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227 */ |
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228 const char *th_findnext(const char * str, size_t * pos) |
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229 { |
| 10 | 230 assert(str != NULL); |
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231 |
| 10 | 232 /* Terminating NULL-character is not whitespace! */ |
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233 while (th_isspace(str[*pos])) |
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234 (*pos)++; |
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235 return &str[*pos]; |
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236 } |
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237 |
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238 |
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239 /* Find next sep-character from string |
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240 */ |
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241 const char *th_findsep(const char * str, size_t * pos, char sep) |
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242 { |
| 10 | 243 assert(str != NULL); |
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244 |
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245 while (str[*pos] && str[*pos] != sep) |
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246 (*pos)++; |
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247 |
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248 return &str[*pos]; |
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249 } |
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250 |
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251 |
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252 /* Find next sep- or whitespace from string |
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253 */ |
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254 const char *th_findseporspace(const char * str, size_t * pos, char sep) |
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255 { |
| 10 | 256 assert(str != NULL); |
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257 |
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258 while (!th_isspace(str[*pos]) && str[*pos] != sep) |
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259 (*pos)++; |
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260 |
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261 return &str[*pos]; |
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262 } |
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263 |
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264 |
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265 /* Compare a string to a pattern. Case-SENSITIVE version. |
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266 * The matching pattern can consist of any normal characters plus |
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267 * wildcards ? and *. "?" matches any character and "*" matches |
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268 * any number of characters. |
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269 */ |
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270 BOOL th_strmatch(const char * str, const char * pattern) |
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271 { |
| 10 | 272 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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273 const char *tmpPattern = NULL; |
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274 |
| 10 | 275 /* Check given pattern and string */ |
| 276 if (str == NULL || pattern == NULL) | |
| 277 return FALSE; | |
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278 |
| 10 | 279 /* Start comparision */ |
| 280 do { | |
| 281 didMatch = FALSE; | |
| 282 switch (*pattern) { | |
| 283 case '?': | |
| 284 /* Any single character matches */ | |
| 285 if (*str) { | |
| 286 didMatch = TRUE; | |
| 287 pattern++; | |
| 288 str++; | |
| 289 } | |
| 290 break; | |
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291 |
| 10 | 292 case '*': |
| 293 didMatch = TRUE; | |
| 294 pattern++; | |
| 295 if (!*pattern) | |
| 296 isEnd = TRUE; | |
| 297 isAnyMode = TRUE; | |
| 298 tmpPattern = pattern; | |
| 299 break; | |
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300 |
| 10 | 301 case 0: |
| 302 if (isAnyMode) { | |
| 303 if (*str) | |
| 304 str++; | |
| 305 else | |
| 306 isEnd = TRUE; | |
| 307 } else { | |
| 308 if (*str) { | |
| 309 if (tmpPattern) { | |
| 310 isAnyMode = TRUE; | |
| 311 pattern = tmpPattern; | |
| 312 } else | |
| 313 didMatch = FALSE; | |
| 314 } else | |
| 315 isEnd = TRUE; | |
| 316 } | |
| 317 break; | |
| 318 default: | |
| 319 if (isAnyMode) { | |
| 320 if (*pattern == *str) { | |
| 321 isAnyMode = FALSE; | |
| 322 didMatch = TRUE; | |
| 323 } else { | |
| 324 if (*str) { | |
| 325 didMatch = TRUE; | |
| 326 str++; | |
| 327 } | |
| 328 } | |
| 329 } else { | |
| 330 if (*pattern == *str) { | |
| 331 didMatch = TRUE; | |
| 332 if (*pattern) | |
| 333 pattern++; | |
| 334 if (*str) | |
| 335 str++; | |
| 336 } else { | |
| 337 if (tmpPattern) { | |
| 338 didMatch = TRUE; | |
| 339 isAnyMode = TRUE; | |
| 340 pattern = tmpPattern; | |
| 341 } | |
| 342 } | |
| 343 } | |
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344 |
| 10 | 345 if (!*str && !*pattern) |
| 346 isEnd = TRUE; | |
| 347 break; | |
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348 |
| 10 | 349 } /* switch */ |
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350 |
| 10 | 351 } while (didMatch && !isEnd); |
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352 |
| 10 | 353 return didMatch; |
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354 } |
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355 |
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356 |
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357 /* Compare a string to a pattern. Case-INSENSITIVE version. |
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358 */ |
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359 BOOL th_strcasematch(const char * str, const char * pattern) |
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360 { |
| 10 | 361 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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362 const char *tmpPattern = NULL; |
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363 |
| 10 | 364 /* Check given pattern and string */ |
| 365 if (str == NULL || pattern == NULL) | |
| 366 return FALSE; | |
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367 |
| 10 | 368 /* Start comparision */ |
| 369 do { | |
| 370 switch (*pattern) { | |
| 371 case '?': | |
| 372 /* Any single character matches */ | |
| 373 if (*str) { | |
| 374 pattern++; | |
| 375 str++; | |
| 376 } else | |
| 377 didMatch = FALSE; | |
| 378 break; | |
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379 |
| 10 | 380 case '*': |
| 381 pattern++; | |
| 382 if (!*pattern || *pattern == '?') | |
| 383 isEnd = TRUE; | |
| 384 isAnyMode = TRUE; | |
| 385 tmpPattern = pattern; | |
| 386 break; | |
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387 |
| 10 | 388 case 0: |
| 389 if (isAnyMode) { | |
| 390 if (*str) | |
| 391 str++; | |
| 392 else | |
| 393 isEnd = TRUE; | |
| 394 } else { | |
| 395 if (*str) { | |
| 396 if (tmpPattern) { | |
| 397 isAnyMode = TRUE; | |
| 398 pattern = tmpPattern; | |
| 399 } else | |
| 400 didMatch = FALSE; | |
| 401 } else | |
| 402 isEnd = TRUE; | |
| 403 } | |
| 404 break; | |
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405 |
| 10 | 406 default: |
| 407 if (isAnyMode) { | |
| 408 if (th_tolower(*pattern) == th_tolower(*str)) { | |
| 409 isAnyMode = FALSE; | |
| 410 } else { | |
| 411 if (*str) | |
| 412 str++; | |
| 413 else | |
| 414 didMatch = FALSE; | |
| 415 } | |
| 416 } else { | |
| 417 if (th_tolower(*pattern) == th_tolower(*str)) { | |
| 418 if (*pattern) | |
| 419 pattern++; | |
| 420 if (*str) | |
| 421 str++; | |
| 422 } else { | |
| 423 if (tmpPattern) { | |
| 424 isAnyMode = TRUE; | |
| 425 pattern = tmpPattern; | |
| 426 } else | |
| 427 didMatch = FALSE; | |
| 428 } | |
| 429 } | |
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430 |
| 10 | 431 if (!*str && !*pattern) |
| 432 isEnd = TRUE; | |
| 433 break; | |
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434 |
| 10 | 435 } /* switch */ |
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436 |
| 10 | 437 } while (didMatch && !isEnd); |
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438 |
| 10 | 439 return didMatch; |
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440 } |
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441 |
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442 |
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443 int th_get_hex_triplet(const char *str) |
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444 { |
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445 const char *p = str; |
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446 int len, val = 0; |
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447 |
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448 for (len = 0; *p && len < 6; p++, len++) { |
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449 if (*p >= '0' && *p <= '9') { |
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450 val *= 16; val += (*p - '0'); |
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451 } else if (*p >= 'A' && *p <= 'F') { |
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452 val *= 16; val += (*p - 'A') + 10; |
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453 } else if (*p >= 'a' && *p <= 'f') { |
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454 val *= 16; val += (*p - 'a') + 10; |
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455 } else |
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456 return -1; |
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457 } |
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458 |
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459 return (len == 6) ? val : -1; |
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460 } |
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461 |
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462 |
| 35 | 463 BOOL th_growbuf(char **buf, size_t *bufsize, size_t *len, size_t grow) |
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464 { |
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465 if (*buf == NULL) |
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466 *bufsize = *len = 0; |
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467 |
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468 if (*buf == NULL || *len + grow >= *bufsize) { |
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469 *bufsize += grow + TH_BUFGROW; |
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470 *buf = (char *) th_realloc(*buf, *bufsize); |
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471 if (*buf == NULL) |
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472 return FALSE; |
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473 } |
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474 return TRUE; |
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475 } |
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476 |
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477 |
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478 BOOL th_vputch(char **buf, size_t *bufsize, size_t *len, const char ch) |
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479 { |
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480 if (!th_growbuf(buf, bufsize, len, 1)) |
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481 return FALSE; |
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482 |
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483 (*buf)[*len] = ch; |
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484 (*len)++; |
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485 |
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486 return TRUE; |
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487 } |
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488 |
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489 |
|
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490 BOOL th_vputs(char **buf, size_t *bufsize, size_t *len, const char *str) |
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491 { |
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492 size_t slen; |
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493 if (str == NULL) |
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494 return FALSE; |
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495 |
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496 slen = strlen(str); |
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497 if (!th_growbuf(buf, bufsize, len, slen)) |
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498 return FALSE; |
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499 |
|
32
7e0a2a125830
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500 strcpy(*buf + *len, str); |
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501 (*len) += slen; |
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|
502 |
|
04cfdefc3253
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503 return TRUE; |
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504 } |
|
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505 |