Mercurial > hg > th-libs
annotate th_string.c @ 38:cdaa16f99474
Oops, forgot a debug fprintf() in. Fixed.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Thu, 23 Jun 2011 11:11:55 +0300 |
| parents | 3986b139bbbd |
| children | 0d55592e0e01 |
| 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 while (1) { |
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68 int n; |
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69 va_list ap; |
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70 va_copy(ap, args); |
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71 n = vsnprintf(buf, size, fmt, ap); |
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72 va_end(ap); |
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73 |
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74 if (n > -1 && n < size) |
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75 return buf; |
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76 if (n > -1) |
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77 size = n + 1; |
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78 else |
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79 size *= 2; |
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80 |
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81 if ((nbuf = th_realloc(nbuf, size)) == NULL) { |
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82 th_free(buf); |
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83 return NULL; |
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84 } |
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85 |
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86 buf = nbuf; |
| 10 | 87 } |
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88 } |
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89 |
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90 |
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91 char * th_strdup_printf(const char *fmt, ...) |
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92 { |
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93 char *res; |
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94 va_list ap; |
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95 |
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96 va_start(ap, fmt); |
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97 res = th_strdup_vprintf(fmt, ap); |
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98 va_end(ap); |
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99 |
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100 return res; |
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101 } |
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102 |
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103 |
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104 void th_pstr_vprintf(char **buf, const char *fmt, va_list ap) |
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105 { |
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106 char *tmp = th_strdup_vprintf(fmt, ap); |
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107 th_free(*buf); |
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108 *buf = tmp; |
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109 } |
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110 |
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111 |
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112 void th_pstr_printf(char **buf, const char *fmt, ...) |
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113 { |
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114 char *tmp; |
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115 va_list ap; |
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116 |
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117 va_start(ap, fmt); |
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118 tmp = th_strdup_vprintf(fmt, ap); |
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119 va_end(ap); |
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120 |
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121 th_free(*buf); |
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122 *buf = tmp; |
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123 } |
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124 |
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125 /* Compare two strings ignoring case [strcasecmp, strncasecmp] |
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126 */ |
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127 int th_strcasecmp(const char * str1, const char * str2) |
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128 { |
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129 const char *s1 = str1, *s2 = str2; |
| 10 | 130 assert(str1 != NULL); |
| 131 assert(str2 != NULL); | |
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132 |
| 10 | 133 if (str1 == str2) |
| 134 return 0; | |
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135 |
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136 while (*s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) { |
| 10 | 137 s1++; |
| 138 s2++; | |
| 139 } | |
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140 |
| 10 | 141 return (th_tolower(*s1) - th_tolower(*s2)); |
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142 } |
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143 |
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144 |
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145 int th_strncasecmp(const char * str1, const char * str2, size_t n) |
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146 { |
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147 const char *s1 = str1, *s2 = str2; |
| 10 | 148 assert(str1 != NULL); |
| 149 assert(str2 != NULL); | |
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150 |
| 10 | 151 if (str1 == str2) |
| 152 return 0; | |
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153 |
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154 while (n > 0 && *s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) { |
| 10 | 155 s1++; |
| 156 s2++; | |
| 157 n--; | |
| 158 } | |
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159 |
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160 return n > 0 ? (th_tolower(*s1) - th_tolower(*s2)) : 0; |
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161 } |
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162 |
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163 |
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164 /* Remove all occurences of control characters, in-place. |
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165 * Resulting string is always shorter or same length than original. |
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166 */ |
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167 void th_strip_ctrlchars(char * str) |
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168 { |
| 10 | 169 char *i, *j; |
| 170 assert(str != NULL); | |
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171 |
| 10 | 172 i = str; |
| 173 j = str; | |
| 174 while (*i) { | |
| 175 if (!th_iscntrl(*i)) | |
| 176 *(j++) = *i; | |
| 177 i++; | |
| 178 } | |
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179 |
| 10 | 180 *j = 0; |
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181 } |
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182 |
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183 |
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184 /* Copy a given string over in *result. |
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185 */ |
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186 int th_pstrcpy(char ** result, const char * str) |
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187 { |
| 10 | 188 assert(result != NULL); |
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189 |
| 10 | 190 if (str == NULL) |
| 191 return -1; | |
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192 |
| 10 | 193 th_free(*result); |
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194 if ((*result = th_malloc(strlen(str) + 1)) == NULL) |
| 10 | 195 return -2; |
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196 |
| 10 | 197 strcpy(*result, str); |
| 198 return 0; | |
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199 } |
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200 |
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201 |
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202 /* Concatenates a given string into string pointed by *result. |
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203 */ |
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204 int th_pstrcat(char ** result, const char * str) |
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205 { |
| 10 | 206 assert(result != NULL); |
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207 |
| 10 | 208 if (str == NULL) |
| 209 return -1; | |
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210 |
| 10 | 211 if (*result != NULL) { |
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212 *result = th_realloc(*result, strlen(*result) + strlen(str) + 1); |
| 10 | 213 if (*result == NULL) |
| 214 return -1; | |
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215 |
| 10 | 216 strcat(*result, str); |
| 217 } else { | |
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218 *result = th_malloc(strlen(str) + 1); |
| 10 | 219 if (*result == NULL) |
| 220 return -1; | |
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221 |
| 10 | 222 strcpy(*result, str); |
| 223 } | |
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224 |
| 10 | 225 return 0; |
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226 } |
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227 |
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228 |
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229 /* Find next non-whitespace character in string. |
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230 * Updates iPos into the position of such character and |
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231 * returns pointer to the string. |
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232 */ |
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233 const char *th_findnext(const char * str, size_t * pos) |
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234 { |
| 10 | 235 assert(str != NULL); |
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236 |
| 10 | 237 /* Terminating NULL-character is not whitespace! */ |
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238 while (th_isspace(str[*pos])) |
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239 (*pos)++; |
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240 return &str[*pos]; |
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241 } |
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242 |
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243 |
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244 /* Find next sep-character from string |
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245 */ |
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246 const char *th_findsep(const char * str, size_t * pos, char sep) |
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247 { |
| 10 | 248 assert(str != NULL); |
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249 |
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250 while (str[*pos] && str[*pos] != sep) |
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251 (*pos)++; |
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252 |
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253 return &str[*pos]; |
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254 } |
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255 |
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256 |
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257 /* Find next sep- or whitespace from string |
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258 */ |
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259 const char *th_findseporspace(const char * str, size_t * pos, char sep) |
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260 { |
| 10 | 261 assert(str != NULL); |
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262 |
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263 while (!th_isspace(str[*pos]) && str[*pos] != sep) |
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264 (*pos)++; |
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265 |
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266 return &str[*pos]; |
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267 } |
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268 |
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269 |
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270 /* Compare a string to a pattern. Case-SENSITIVE version. |
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271 * The matching pattern can consist of any normal characters plus |
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272 * wildcards ? and *. "?" matches any character and "*" matches |
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273 * any number of characters. |
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274 */ |
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275 BOOL th_strmatch(const char * str, const char * pattern) |
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276 { |
| 10 | 277 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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278 const char *tmpPattern = NULL; |
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279 |
| 10 | 280 /* Check given pattern and string */ |
| 281 if (str == NULL || pattern == NULL) | |
| 282 return FALSE; | |
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283 |
| 10 | 284 /* Start comparision */ |
| 285 do { | |
| 286 didMatch = FALSE; | |
| 287 switch (*pattern) { | |
| 288 case '?': | |
| 289 /* Any single character matches */ | |
| 290 if (*str) { | |
| 291 didMatch = TRUE; | |
| 292 pattern++; | |
| 293 str++; | |
| 294 } | |
| 295 break; | |
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296 |
| 10 | 297 case '*': |
| 298 didMatch = TRUE; | |
| 299 pattern++; | |
| 300 if (!*pattern) | |
| 301 isEnd = TRUE; | |
| 302 isAnyMode = TRUE; | |
| 303 tmpPattern = pattern; | |
| 304 break; | |
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305 |
| 10 | 306 case 0: |
| 307 if (isAnyMode) { | |
| 308 if (*str) | |
| 309 str++; | |
| 310 else | |
| 311 isEnd = TRUE; | |
| 312 } else { | |
| 313 if (*str) { | |
| 314 if (tmpPattern) { | |
| 315 isAnyMode = TRUE; | |
| 316 pattern = tmpPattern; | |
| 317 } else | |
| 318 didMatch = FALSE; | |
| 319 } else | |
| 320 isEnd = TRUE; | |
| 321 } | |
| 322 break; | |
| 323 default: | |
| 324 if (isAnyMode) { | |
| 325 if (*pattern == *str) { | |
| 326 isAnyMode = FALSE; | |
| 327 didMatch = TRUE; | |
| 328 } else { | |
| 329 if (*str) { | |
| 330 didMatch = TRUE; | |
| 331 str++; | |
| 332 } | |
| 333 } | |
| 334 } else { | |
| 335 if (*pattern == *str) { | |
| 336 didMatch = TRUE; | |
| 337 if (*pattern) | |
| 338 pattern++; | |
| 339 if (*str) | |
| 340 str++; | |
| 341 } else { | |
| 342 if (tmpPattern) { | |
| 343 didMatch = TRUE; | |
| 344 isAnyMode = TRUE; | |
| 345 pattern = tmpPattern; | |
| 346 } | |
| 347 } | |
| 348 } | |
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349 |
| 10 | 350 if (!*str && !*pattern) |
| 351 isEnd = TRUE; | |
| 352 break; | |
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353 |
| 10 | 354 } /* switch */ |
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355 |
| 10 | 356 } while (didMatch && !isEnd); |
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357 |
| 10 | 358 return didMatch; |
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359 } |
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360 |
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361 |
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362 /* Compare a string to a pattern. Case-INSENSITIVE version. |
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363 */ |
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364 BOOL th_strcasematch(const char * str, const char * pattern) |
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365 { |
| 10 | 366 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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367 const char *tmpPattern = NULL; |
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368 |
| 10 | 369 /* Check given pattern and string */ |
| 370 if (str == NULL || pattern == NULL) | |
| 371 return FALSE; | |
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372 |
| 10 | 373 /* Start comparision */ |
| 374 do { | |
| 375 switch (*pattern) { | |
| 376 case '?': | |
| 377 /* Any single character matches */ | |
| 378 if (*str) { | |
| 379 pattern++; | |
| 380 str++; | |
| 381 } else | |
| 382 didMatch = FALSE; | |
| 383 break; | |
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384 |
| 10 | 385 case '*': |
| 386 pattern++; | |
| 387 if (!*pattern || *pattern == '?') | |
| 388 isEnd = TRUE; | |
| 389 isAnyMode = TRUE; | |
| 390 tmpPattern = pattern; | |
| 391 break; | |
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392 |
| 10 | 393 case 0: |
| 394 if (isAnyMode) { | |
| 395 if (*str) | |
| 396 str++; | |
| 397 else | |
| 398 isEnd = TRUE; | |
| 399 } else { | |
| 400 if (*str) { | |
| 401 if (tmpPattern) { | |
| 402 isAnyMode = TRUE; | |
| 403 pattern = tmpPattern; | |
| 404 } else | |
| 405 didMatch = FALSE; | |
| 406 } else | |
| 407 isEnd = TRUE; | |
| 408 } | |
| 409 break; | |
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410 |
| 10 | 411 default: |
| 412 if (isAnyMode) { | |
| 413 if (th_tolower(*pattern) == th_tolower(*str)) { | |
| 414 isAnyMode = FALSE; | |
| 415 } else { | |
| 416 if (*str) | |
| 417 str++; | |
| 418 else | |
| 419 didMatch = FALSE; | |
| 420 } | |
| 421 } else { | |
| 422 if (th_tolower(*pattern) == th_tolower(*str)) { | |
| 423 if (*pattern) | |
| 424 pattern++; | |
| 425 if (*str) | |
| 426 str++; | |
| 427 } else { | |
| 428 if (tmpPattern) { | |
| 429 isAnyMode = TRUE; | |
| 430 pattern = tmpPattern; | |
| 431 } else | |
| 432 didMatch = FALSE; | |
| 433 } | |
| 434 } | |
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435 |
| 10 | 436 if (!*str && !*pattern) |
| 437 isEnd = TRUE; | |
| 438 break; | |
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439 |
| 10 | 440 } /* switch */ |
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441 |
| 10 | 442 } while (didMatch && !isEnd); |
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443 |
| 10 | 444 return didMatch; |
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445 } |
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446 |
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447 |
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448 int th_get_hex_triplet(const char *str) |
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449 { |
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450 const char *p = str; |
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451 int len, val = 0; |
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452 |
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453 for (len = 0; *p && len < 6; p++, len++) { |
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454 if (*p >= '0' && *p <= '9') { |
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455 val *= 16; val += (*p - '0'); |
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456 } else if (*p >= 'A' && *p <= 'F') { |
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457 val *= 16; val += (*p - 'A') + 10; |
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458 } else if (*p >= 'a' && *p <= 'f') { |
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459 val *= 16; val += (*p - 'a') + 10; |
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460 } else |
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461 return -1; |
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462 } |
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463 |
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464 return (len == 6) ? val : -1; |
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465 } |
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466 |
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467 |
| 35 | 468 BOOL th_growbuf(char **buf, size_t *bufsize, size_t *len, size_t grow) |
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469 { |
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470 if (*buf == NULL) |
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471 *bufsize = *len = 0; |
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472 |
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473 if (*buf == NULL || *len + grow >= *bufsize) { |
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474 *bufsize += grow + TH_BUFGROW; |
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475 *buf = (char *) th_realloc(*buf, *bufsize); |
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476 if (*buf == NULL) |
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477 return FALSE; |
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478 } |
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479 return TRUE; |
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480 } |
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481 |
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482 |
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483 BOOL th_vputch(char **buf, size_t *bufsize, size_t *len, const char ch) |
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484 { |
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485 if (!th_growbuf(buf, bufsize, len, 1)) |
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486 return FALSE; |
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487 |
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488 (*buf)[*len] = ch; |
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489 (*len)++; |
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490 |
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491 return TRUE; |
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492 } |
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493 |
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494 |
|
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495 BOOL th_vputs(char **buf, size_t *bufsize, size_t *len, const char *str) |
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496 { |
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497 size_t slen; |
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498 if (str == NULL) |
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499 return FALSE; |
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500 |
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501 slen = strlen(str); |
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502 if (!th_growbuf(buf, bufsize, len, slen)) |
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503 return FALSE; |
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504 |
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505 strcpy(*buf + *len, str); |
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506 (*len) += slen; |
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507 |
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508 return TRUE; |
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509 } |
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510 |