Mercurial > hg > th-libs
annotate th_string.c @ 37:3986b139bbbd
Fix th_strdup_vprintf(), another misuse of va_list without making a copy of it... :(
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Thu, 23 Jun 2011 11:09:23 +0300 |
| parents | 760788e21699 |
| children | cdaa16f99474 |
| 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 = 64; |
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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 fprintf(stderr, "th_strdup_vprintf(\"%s\", ...):\n", fmt); |
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68 while (1) { |
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69 int n; |
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70 va_list ap; |
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71 va_copy(ap, args); |
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72 n = vsnprintf(buf, size, fmt, ap); |
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73 va_end(ap); |
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74 |
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75 if (n > -1 && n < size) |
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76 return buf; |
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77 if (n > -1) |
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78 size = n + 1; |
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79 else |
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80 size *= 2; |
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81 |
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82 if ((nbuf = th_realloc(nbuf, size)) == NULL) { |
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83 th_free(buf); |
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84 return NULL; |
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85 } |
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86 |
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87 buf = nbuf; |
| 10 | 88 } |
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89 } |
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90 |
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91 |
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92 char * th_strdup_printf(const char *fmt, ...) |
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93 { |
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94 char *res; |
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95 va_list ap; |
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96 |
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97 va_start(ap, fmt); |
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98 res = th_strdup_vprintf(fmt, ap); |
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99 va_end(ap); |
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100 |
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101 return res; |
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102 } |
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103 |
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104 |
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105 void th_pstr_vprintf(char **buf, const char *fmt, va_list ap) |
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106 { |
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107 char *tmp = th_strdup_vprintf(fmt, ap); |
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108 th_free(*buf); |
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109 *buf = tmp; |
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110 } |
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111 |
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112 |
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113 void th_pstr_printf(char **buf, const char *fmt, ...) |
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114 { |
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115 char *tmp; |
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116 va_list ap; |
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117 |
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118 va_start(ap, fmt); |
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119 tmp = th_strdup_vprintf(fmt, ap); |
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120 va_end(ap); |
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121 |
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122 th_free(*buf); |
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123 *buf = tmp; |
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124 } |
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125 |
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126 /* Compare two strings ignoring case [strcasecmp, strncasecmp] |
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127 */ |
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128 int th_strcasecmp(const char * str1, const char * str2) |
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129 { |
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130 const char *s1 = str1, *s2 = str2; |
| 10 | 131 assert(str1 != NULL); |
| 132 assert(str2 != NULL); | |
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133 |
| 10 | 134 if (str1 == str2) |
| 135 return 0; | |
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136 |
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137 while (*s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) { |
| 10 | 138 s1++; |
| 139 s2++; | |
| 140 } | |
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141 |
| 10 | 142 return (th_tolower(*s1) - th_tolower(*s2)); |
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143 } |
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144 |
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145 |
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146 int th_strncasecmp(const char * str1, const char * str2, size_t n) |
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147 { |
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148 const char *s1 = str1, *s2 = str2; |
| 10 | 149 assert(str1 != NULL); |
| 150 assert(str2 != NULL); | |
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151 |
| 10 | 152 if (str1 == str2) |
| 153 return 0; | |
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154 |
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155 while (n > 0 && *s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) { |
| 10 | 156 s1++; |
| 157 s2++; | |
| 158 n--; | |
| 159 } | |
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160 |
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161 return n > 0 ? (th_tolower(*s1) - th_tolower(*s2)) : 0; |
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162 } |
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163 |
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164 |
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165 /* Remove all occurences of control characters, in-place. |
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166 * Resulting string is always shorter or same length than original. |
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167 */ |
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168 void th_strip_ctrlchars(char * str) |
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169 { |
| 10 | 170 char *i, *j; |
| 171 assert(str != NULL); | |
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172 |
| 10 | 173 i = str; |
| 174 j = str; | |
| 175 while (*i) { | |
| 176 if (!th_iscntrl(*i)) | |
| 177 *(j++) = *i; | |
| 178 i++; | |
| 179 } | |
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180 |
| 10 | 181 *j = 0; |
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182 } |
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183 |
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184 |
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185 /* Copy a given string over in *result. |
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186 */ |
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187 int th_pstrcpy(char ** result, const char * str) |
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188 { |
| 10 | 189 assert(result != NULL); |
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190 |
| 10 | 191 if (str == NULL) |
| 192 return -1; | |
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193 |
| 10 | 194 th_free(*result); |
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195 if ((*result = th_malloc(strlen(str) + 1)) == NULL) |
| 10 | 196 return -2; |
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197 |
| 10 | 198 strcpy(*result, str); |
| 199 return 0; | |
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200 } |
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201 |
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202 |
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203 /* Concatenates a given string into string pointed by *result. |
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204 */ |
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205 int th_pstrcat(char ** result, const char * str) |
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206 { |
| 10 | 207 assert(result != NULL); |
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208 |
| 10 | 209 if (str == NULL) |
| 210 return -1; | |
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211 |
| 10 | 212 if (*result != NULL) { |
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213 *result = th_realloc(*result, strlen(*result) + strlen(str) + 1); |
| 10 | 214 if (*result == NULL) |
| 215 return -1; | |
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216 |
| 10 | 217 strcat(*result, str); |
| 218 } else { | |
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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 */ |
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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)++; |
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241 return &str[*pos]; |
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242 } |
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243 |
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244 |
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245 /* Find next sep-character from string |
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246 */ |
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247 const char *th_findsep(const char * str, size_t * pos, char sep) |
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248 { |
| 10 | 249 assert(str != NULL); |
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250 |
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251 while (str[*pos] && str[*pos] != sep) |
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252 (*pos)++; |
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253 |
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254 return &str[*pos]; |
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255 } |
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256 |
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257 |
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258 /* Find next sep- or whitespace from string |
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259 */ |
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260 const char *th_findseporspace(const char * str, size_t * pos, char sep) |
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261 { |
| 10 | 262 assert(str != NULL); |
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263 |
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264 while (!th_isspace(str[*pos]) && str[*pos] != sep) |
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265 (*pos)++; |
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266 |
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267 return &str[*pos]; |
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268 } |
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269 |
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270 |
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271 /* Compare a string to a pattern. Case-SENSITIVE version. |
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272 * The matching pattern can consist of any normal characters plus |
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273 * wildcards ? and *. "?" matches any character and "*" matches |
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274 * any number of characters. |
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275 */ |
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276 BOOL th_strmatch(const char * str, const char * pattern) |
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277 { |
| 10 | 278 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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279 const char *tmpPattern = NULL; |
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280 |
| 10 | 281 /* Check given pattern and string */ |
| 282 if (str == NULL || pattern == NULL) | |
| 283 return FALSE; | |
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284 |
| 10 | 285 /* Start comparision */ |
| 286 do { | |
| 287 didMatch = FALSE; | |
| 288 switch (*pattern) { | |
| 289 case '?': | |
| 290 /* Any single character matches */ | |
| 291 if (*str) { | |
| 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: |
| 308 if (isAnyMode) { | |
| 309 if (*str) | |
| 310 str++; | |
| 311 else | |
| 312 isEnd = TRUE; | |
| 313 } else { | |
| 314 if (*str) { | |
| 315 if (tmpPattern) { | |
| 316 isAnyMode = TRUE; | |
| 317 pattern = tmpPattern; | |
| 318 } else | |
| 319 didMatch = FALSE; | |
| 320 } else | |
| 321 isEnd = TRUE; | |
| 322 } | |
| 323 break; | |
| 324 default: | |
| 325 if (isAnyMode) { | |
| 326 if (*pattern == *str) { | |
| 327 isAnyMode = FALSE; | |
| 328 didMatch = TRUE; | |
| 329 } else { | |
| 330 if (*str) { | |
| 331 didMatch = TRUE; | |
| 332 str++; | |
| 333 } | |
| 334 } | |
| 335 } else { | |
| 336 if (*pattern == *str) { | |
| 337 didMatch = TRUE; | |
| 338 if (*pattern) | |
| 339 pattern++; | |
| 340 if (*str) | |
| 341 str++; | |
| 342 } else { | |
| 343 if (tmpPattern) { | |
| 344 didMatch = TRUE; | |
| 345 isAnyMode = TRUE; | |
| 346 pattern = tmpPattern; | |
| 347 } | |
| 348 } | |
| 349 } | |
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350 |
| 10 | 351 if (!*str && !*pattern) |
| 352 isEnd = TRUE; | |
| 353 break; | |
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354 |
| 10 | 355 } /* switch */ |
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356 |
| 10 | 357 } while (didMatch && !isEnd); |
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358 |
| 10 | 359 return didMatch; |
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360 } |
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361 |
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362 |
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363 /* Compare a string to a pattern. Case-INSENSITIVE version. |
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364 */ |
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365 BOOL th_strcasematch(const char * str, const char * pattern) |
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366 { |
| 10 | 367 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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368 const char *tmpPattern = NULL; |
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369 |
| 10 | 370 /* Check given pattern and string */ |
| 371 if (str == NULL || pattern == NULL) | |
| 372 return FALSE; | |
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373 |
| 10 | 374 /* Start comparision */ |
| 375 do { | |
| 376 switch (*pattern) { | |
| 377 case '?': | |
| 378 /* Any single character matches */ | |
| 379 if (*str) { | |
| 380 pattern++; | |
| 381 str++; | |
| 382 } else | |
| 383 didMatch = FALSE; | |
| 384 break; | |
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385 |
| 10 | 386 case '*': |
| 387 pattern++; | |
| 388 if (!*pattern || *pattern == '?') | |
| 389 isEnd = TRUE; | |
| 390 isAnyMode = TRUE; | |
| 391 tmpPattern = pattern; | |
| 392 break; | |
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393 |
| 10 | 394 case 0: |
| 395 if (isAnyMode) { | |
| 396 if (*str) | |
| 397 str++; | |
| 398 else | |
| 399 isEnd = TRUE; | |
| 400 } else { | |
| 401 if (*str) { | |
| 402 if (tmpPattern) { | |
| 403 isAnyMode = TRUE; | |
| 404 pattern = tmpPattern; | |
| 405 } else | |
| 406 didMatch = FALSE; | |
| 407 } else | |
| 408 isEnd = TRUE; | |
| 409 } | |
| 410 break; | |
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411 |
| 10 | 412 default: |
| 413 if (isAnyMode) { | |
| 414 if (th_tolower(*pattern) == th_tolower(*str)) { | |
| 415 isAnyMode = FALSE; | |
| 416 } else { | |
| 417 if (*str) | |
| 418 str++; | |
| 419 else | |
| 420 didMatch = FALSE; | |
| 421 } | |
| 422 } else { | |
| 423 if (th_tolower(*pattern) == th_tolower(*str)) { | |
| 424 if (*pattern) | |
| 425 pattern++; | |
| 426 if (*str) | |
| 427 str++; | |
| 428 } else { | |
| 429 if (tmpPattern) { | |
| 430 isAnyMode = TRUE; | |
| 431 pattern = tmpPattern; | |
| 432 } else | |
| 433 didMatch = FALSE; | |
| 434 } | |
| 435 } | |
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436 |
| 10 | 437 if (!*str && !*pattern) |
| 438 isEnd = TRUE; | |
| 439 break; | |
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440 |
| 10 | 441 } /* switch */ |
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442 |
| 10 | 443 } while (didMatch && !isEnd); |
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444 |
| 10 | 445 return didMatch; |
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446 } |
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447 |
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448 |
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449 int th_get_hex_triplet(const char *str) |
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450 { |
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451 const char *p = str; |
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452 int len, val = 0; |
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453 |
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454 for (len = 0; *p && len < 6; p++, len++) { |
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455 if (*p >= '0' && *p <= '9') { |
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456 val *= 16; val += (*p - '0'); |
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457 } else if (*p >= 'A' && *p <= 'F') { |
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458 val *= 16; val += (*p - 'A') + 10; |
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459 } else if (*p >= 'a' && *p <= 'f') { |
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460 val *= 16; val += (*p - 'a') + 10; |
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461 } else |
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462 return -1; |
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463 } |
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464 |
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465 return (len == 6) ? val : -1; |
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466 } |
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467 |
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468 |
| 35 | 469 BOOL th_growbuf(char **buf, size_t *bufsize, size_t *len, size_t grow) |
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470 { |
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471 if (*buf == NULL) |
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472 *bufsize = *len = 0; |
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473 |
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474 if (*buf == NULL || *len + grow >= *bufsize) { |
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475 *bufsize += grow + TH_BUFGROW; |
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476 *buf = (char *) th_realloc(*buf, *bufsize); |
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477 if (*buf == NULL) |
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478 return FALSE; |
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479 } |
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480 return TRUE; |
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481 } |
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482 |
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483 |
|
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484 BOOL th_vputch(char **buf, size_t *bufsize, size_t *len, const char ch) |
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485 { |
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486 if (!th_growbuf(buf, bufsize, len, 1)) |
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487 return FALSE; |
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488 |
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489 (*buf)[*len] = ch; |
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490 (*len)++; |
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491 |
|
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492 return TRUE; |
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493 } |
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494 |
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495 |
|
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496 BOOL th_vputs(char **buf, size_t *bufsize, size_t *len, const char *str) |
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497 { |
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498 size_t slen; |
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499 if (str == NULL) |
|
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500 return FALSE; |
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501 |
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502 slen = strlen(str); |
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503 if (!th_growbuf(buf, bufsize, len, slen)) |
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504 return FALSE; |
|
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505 |
|
32
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506 strcpy(*buf + *len, str); |
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507 (*len) += slen; |
|
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|
508 |
|
04cfdefc3253
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509 return TRUE; |
|
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510 } |
|
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511 |