Mercurial > hg > th-libs
annotate th_string.c @ 82:3e5c0615125c
Oops, th_alloc() -> th_malloc().
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Sat, 04 May 2013 03:39:41 +0300 |
| parents | c9c0541bed90 |
| children | b6f3486c4d6c |
| 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 |
| 66 | 4 * (C) Copyright 2002-2012 Tecnic Software productions (TNSP) |
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5 * |
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6 * Please read file 'COPYING' for information on license and distribution. |
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7 */ |
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8 #include "th_util.h" |
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9 #include "th_string.h" |
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10 |
| 80 | 11 |
| 12 /* Implementation of strdup() with a NULL check | |
| 8 | 13 */ |
| 14 char *th_strdup(const char *s) | |
| 15 { | |
| 10 | 16 char *res; |
| 17 if (s == NULL) | |
| 18 return NULL; | |
| 44 | 19 |
| 10 | 20 if ((res = th_malloc(strlen(s) + 1)) == NULL) |
| 21 return NULL; | |
| 44 | 22 |
| 10 | 23 strcpy(res, s); |
| 24 return res; | |
| 8 | 25 } |
| 26 | |
| 27 | |
| 81 | 28 /* Implementation of strndup() with NULL check |
| 29 */ | |
| 30 char *th_strndup(const char *s, const size_t n) | |
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31 { |
| 81 | 32 char *res; |
| 33 size_t len; | |
| 79 | 34 |
| 81 | 35 if (s == NULL) |
| 36 return NULL; | |
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37 |
| 81 | 38 len = strlen(s); |
| 39 if (len > n) | |
| 40 len = n; | |
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41 |
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82
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42 if ((res = th_malloc(len + 1)) == NULL) |
| 81 | 43 return NULL; |
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44 |
| 81 | 45 memcpy(res, s, len); |
| 46 res[len] = 0; | |
| 47 | |
| 48 return res; | |
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49 } |
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50 |
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51 |
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52 /* Simulate a sprintf() that allocates memory |
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53 */ |
| 43 | 54 char *th_strdup_vprintf(const char *fmt, va_list args) |
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55 { |
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56 int size = 64; |
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57 char *buf; |
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58 |
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59 if ((buf = th_malloc(size)) == NULL) |
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60 return NULL; |
| 44 | 61 |
| 39 | 62 while (1) |
| 63 { | |
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64 int n; |
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65 va_list ap; |
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66 va_copy(ap, args); |
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67 n = vsnprintf(buf, size, fmt, ap); |
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68 va_end(ap); |
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69 |
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70 if (n > -1 && n < size) |
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71 return buf; |
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72 if (n > -1) |
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73 size = n + 1; |
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74 else |
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75 size *= 2; |
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76 |
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77 if ((buf = th_realloc(buf, size)) == NULL) |
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78 return NULL; |
| 10 | 79 } |
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80 } |
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81 |
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82 |
| 43 | 83 char *th_strdup_printf(const char *fmt, ...) |
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84 { |
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85 char *res; |
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86 va_list ap; |
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87 |
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88 va_start(ap, fmt); |
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89 res = th_strdup_vprintf(fmt, ap); |
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90 va_end(ap); |
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91 |
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92 return res; |
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93 } |
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94 |
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95 |
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96 void th_pstr_vprintf(char **buf, const char *fmt, va_list ap) |
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97 { |
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98 char *tmp = th_strdup_vprintf(fmt, ap); |
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99 th_free(*buf); |
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100 *buf = tmp; |
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101 } |
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102 |
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103 |
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104 void th_pstr_printf(char **buf, const char *fmt, ...) |
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105 { |
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106 char *tmp; |
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107 va_list ap; |
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108 |
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109 va_start(ap, fmt); |
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110 tmp = th_strdup_vprintf(fmt, ap); |
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111 va_end(ap); |
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112 |
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113 th_free(*buf); |
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114 *buf = tmp; |
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115 } |
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116 |
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117 /* Compare two strings ignoring case [strcasecmp, strncasecmp] |
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118 */ |
| 43 | 119 int th_strcasecmp(const char *str1, const char *str2) |
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120 { |
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121 const char *s1 = str1, *s2 = str2; |
| 10 | 122 assert(str1 != NULL); |
| 123 assert(str2 != NULL); | |
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124 |
| 10 | 125 if (str1 == str2) |
| 126 return 0; | |
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127 |
| 39 | 128 while (*s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) |
| 129 { | |
| 10 | 130 s1++; |
| 131 s2++; | |
| 132 } | |
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133 |
| 10 | 134 return (th_tolower(*s1) - th_tolower(*s2)); |
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135 } |
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136 |
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137 |
| 43 | 138 int th_strncasecmp(const char *str1, const char *str2, size_t n) |
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139 { |
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140 const char *s1 = str1, *s2 = str2; |
| 10 | 141 assert(str1 != NULL); |
| 142 assert(str2 != NULL); | |
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143 |
| 10 | 144 if (str1 == str2) |
| 145 return 0; | |
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146 |
| 39 | 147 while (n > 0 && *s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) |
| 148 { | |
| 10 | 149 s1++; |
| 150 s2++; | |
| 151 n--; | |
| 152 } | |
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153 |
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154 return n > 0 ? (th_tolower(*s1) - th_tolower(*s2)) : 0; |
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155 } |
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156 |
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157 |
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158 /* Remove all occurences of control characters, in-place. |
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159 * Resulting string is always shorter or same length than original. |
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160 */ |
| 43 | 161 void th_strip_ctrlchars(char *str) |
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162 { |
| 10 | 163 char *i, *j; |
| 164 assert(str != NULL); | |
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165 |
| 10 | 166 i = str; |
| 167 j = str; | |
| 39 | 168 while (*i) |
| 169 { | |
| 10 | 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 */ |
| 43 | 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 */ |
| 43 | 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 |
| 39 | 206 if (*result != NULL) |
| 207 { | |
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208 *result = th_realloc(*result, strlen(*result) + strlen(str) + 1); |
| 10 | 209 if (*result == NULL) |
| 210 return -1; | |
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211 |
| 10 | 212 strcat(*result, str); |
| 39 | 213 } |
| 214 else | |
| 215 { | |
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216 *result = th_malloc(strlen(str) + 1); |
| 10 | 217 if (*result == NULL) |
| 218 return -1; | |
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219 |
| 10 | 220 strcpy(*result, str); |
| 221 } | |
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222 |
| 10 | 223 return 0; |
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224 } |
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225 |
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226 |
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227 /* Find next non-whitespace character in string. |
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228 * Updates iPos into the position of such character and |
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229 * returns pointer to the string. |
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230 */ |
| 43 | 231 const char *th_findnext(const char *str, size_t *pos) |
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232 { |
| 10 | 233 assert(str != NULL); |
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234 |
| 10 | 235 /* Terminating NULL-character is not whitespace! */ |
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236 while (th_isspace(str[*pos])) |
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237 (*pos)++; |
| 39 | 238 |
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239 return &str[*pos]; |
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240 } |
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241 |
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242 |
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243 /* Find next sep-character from string |
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244 */ |
| 43 | 245 const char *th_findsep(const char *str, size_t *pos, char sep) |
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246 { |
| 10 | 247 assert(str != NULL); |
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248 |
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249 while (str[*pos] && str[*pos] != sep) |
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250 (*pos)++; |
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251 |
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252 return &str[*pos]; |
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253 } |
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254 |
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255 |
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256 /* Find next sep- or whitespace from string |
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257 */ |
| 43 | 258 const char *th_findseporspace(const char *str, size_t *pos, char sep) |
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259 { |
| 10 | 260 assert(str != NULL); |
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261 |
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262 while (!th_isspace(str[*pos]) && str[*pos] != sep) |
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263 (*pos)++; |
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264 |
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265 return &str[*pos]; |
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266 } |
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267 |
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268 |
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269 /* Compare a string to a pattern. Case-SENSITIVE version. |
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270 * The matching pattern can consist of any normal characters plus |
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271 * wildcards ? and *. "?" matches any character and "*" matches |
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272 * any number of characters. |
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273 */ |
| 43 | 274 BOOL th_strmatch(const char *str, const char *pattern) |
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275 { |
| 10 | 276 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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277 const char *tmpPattern = NULL; |
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278 |
| 10 | 279 /* Check given pattern and string */ |
| 280 if (str == NULL || pattern == NULL) | |
| 281 return FALSE; | |
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282 |
| 10 | 283 /* Start comparision */ |
| 284 do { | |
| 285 didMatch = FALSE; | |
| 39 | 286 switch (*pattern) |
| 287 { | |
| 10 | 288 case '?': |
| 289 /* Any single character matches */ | |
| 39 | 290 if (*str) |
| 291 { | |
| 10 | 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: |
| 39 | 308 if (isAnyMode) |
| 309 { | |
| 10 | 310 if (*str) |
| 311 str++; | |
| 312 else | |
| 313 isEnd = TRUE; | |
| 39 | 314 } |
| 315 else | |
| 316 { | |
| 317 if (*str) | |
| 318 { | |
| 319 if (tmpPattern) | |
| 320 { | |
| 10 | 321 isAnyMode = TRUE; |
| 322 pattern = tmpPattern; | |
| 39 | 323 } |
| 324 else | |
| 10 | 325 didMatch = FALSE; |
| 44 | 326 } |
| 327 else | |
| 10 | 328 isEnd = TRUE; |
| 329 } | |
| 330 break; | |
| 331 default: | |
| 39 | 332 if (isAnyMode) |
| 333 { | |
| 334 if (*pattern == *str) | |
| 335 { | |
| 10 | 336 isAnyMode = FALSE; |
| 337 didMatch = TRUE; | |
| 39 | 338 } |
| 339 else | |
| 340 { | |
| 341 if (*str) | |
| 342 { | |
| 10 | 343 didMatch = TRUE; |
| 344 str++; | |
| 345 } | |
| 346 } | |
| 39 | 347 } |
| 348 else | |
| 349 { | |
| 350 if (*pattern == *str) | |
| 351 { | |
| 10 | 352 didMatch = TRUE; |
| 353 if (*pattern) | |
| 354 pattern++; | |
| 355 if (*str) | |
| 356 str++; | |
| 39 | 357 } |
| 358 else | |
| 359 { | |
| 360 if (tmpPattern) | |
| 361 { | |
| 10 | 362 didMatch = TRUE; |
| 363 isAnyMode = TRUE; | |
| 364 pattern = tmpPattern; | |
| 365 } | |
| 366 } | |
| 367 } | |
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368 |
| 10 | 369 if (!*str && !*pattern) |
| 370 isEnd = TRUE; | |
| 371 break; | |
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372 |
| 10 | 373 } /* switch */ |
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374 |
| 10 | 375 } while (didMatch && !isEnd); |
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376 |
| 10 | 377 return didMatch; |
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378 } |
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379 |
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380 |
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381 /* Compare a string to a pattern. Case-INSENSITIVE version. |
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382 */ |
| 43 | 383 BOOL th_strcasematch(const char *str, const char *pattern) |
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384 { |
| 10 | 385 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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386 const char *tmpPattern = NULL; |
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387 |
| 10 | 388 /* Check given pattern and string */ |
| 389 if (str == NULL || pattern == NULL) | |
| 390 return FALSE; | |
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391 |
| 10 | 392 /* Start comparision */ |
| 393 do { | |
| 394 switch (*pattern) { | |
| 395 case '?': | |
| 396 /* Any single character matches */ | |
| 39 | 397 if (*str) |
| 398 { | |
| 10 | 399 pattern++; |
| 400 str++; | |
| 44 | 401 } |
| 402 else | |
| 10 | 403 didMatch = FALSE; |
| 404 break; | |
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405 |
| 10 | 406 case '*': |
| 407 pattern++; | |
| 408 if (!*pattern || *pattern == '?') | |
| 409 isEnd = TRUE; | |
| 410 isAnyMode = TRUE; | |
| 411 tmpPattern = pattern; | |
| 412 break; | |
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413 |
| 10 | 414 case 0: |
| 39 | 415 if (isAnyMode) |
| 416 { | |
| 10 | 417 if (*str) |
| 418 str++; | |
| 419 else | |
| 420 isEnd = TRUE; | |
| 39 | 421 } |
| 422 else | |
| 423 { | |
| 424 if (*str) | |
| 425 { | |
| 426 if (tmpPattern) | |
| 427 { | |
| 10 | 428 isAnyMode = TRUE; |
| 429 pattern = tmpPattern; | |
| 39 | 430 } |
| 431 else | |
| 10 | 432 didMatch = FALSE; |
| 44 | 433 } |
| 434 else | |
| 10 | 435 isEnd = TRUE; |
| 436 } | |
| 437 break; | |
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438 |
| 10 | 439 default: |
| 39 | 440 if (isAnyMode) |
| 441 { | |
| 442 if (th_tolower(*pattern) == th_tolower(*str)) | |
| 443 { | |
| 10 | 444 isAnyMode = FALSE; |
| 39 | 445 } |
| 446 else | |
| 447 { | |
| 10 | 448 if (*str) |
| 449 str++; | |
| 450 else | |
| 451 didMatch = FALSE; | |
| 452 } | |
| 39 | 453 } |
| 454 else | |
| 455 { | |
| 456 if (th_tolower(*pattern) == th_tolower(*str)) | |
| 457 { | |
| 10 | 458 if (*pattern) |
| 459 pattern++; | |
| 460 if (*str) | |
| 461 str++; | |
| 39 | 462 } |
| 463 else | |
| 464 { | |
| 465 if (tmpPattern) | |
| 466 { | |
| 10 | 467 isAnyMode = TRUE; |
| 468 pattern = tmpPattern; | |
| 39 | 469 } |
| 470 else | |
| 10 | 471 didMatch = FALSE; |
| 472 } | |
| 473 } | |
|
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474 |
| 10 | 475 if (!*str && !*pattern) |
| 476 isEnd = TRUE; | |
| 39 | 477 |
| 10 | 478 break; |
|
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479 |
| 10 | 480 } /* switch */ |
|
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481 |
| 10 | 482 } while (didMatch && !isEnd); |
|
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483 |
| 10 | 484 return didMatch; |
|
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485 } |
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486 |
|
14
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487 |
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488 int th_get_hex_triplet(const char *str) |
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489 { |
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490 const char *p = str; |
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491 int len, val = 0; |
| 44 | 492 |
| 39 | 493 for (len = 0; *p && len < 6; p++, len++) |
| 494 { | |
| 495 if (*p >= '0' && *p <= '9') | |
| 496 { | |
| 497 val *= 16; | |
| 498 val += (*p - '0'); | |
| 499 } | |
| 500 else if (*p >= 'A' && *p <= 'F') | |
| 501 { | |
| 502 val *= 16; | |
| 503 val += (*p - 'A') + 10; | |
| 504 } | |
| 505 else if (*p >= 'a' && *p <= 'f') | |
| 506 { | |
| 507 val *= 16; | |
| 508 val += (*p - 'a') + 10; | |
| 509 } | |
| 510 else | |
|
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511 return -1; |
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512 } |
| 44 | 513 |
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514 return (len == 6) ? val : -1; |
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515 } |
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516 |
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517 |
| 35 | 518 BOOL th_growbuf(char **buf, size_t *bufsize, size_t *len, size_t grow) |
|
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519 { |
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520 if (*buf == NULL) |
|
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521 *bufsize = *len = 0; |
| 44 | 522 |
| 39 | 523 if (*buf == NULL || *len + grow >= *bufsize) |
| 524 { | |
|
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525 *bufsize += grow + TH_BUFGROW; |
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526 *buf = (char *) th_realloc(*buf, *bufsize); |
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527 if (*buf == NULL) |
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528 return FALSE; |
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529 } |
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530 return TRUE; |
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531 } |
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532 |
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533 |
|
29
04cfdefc3253
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534 BOOL th_vputch(char **buf, size_t *bufsize, size_t *len, const char ch) |
|
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535 { |
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536 if (!th_growbuf(buf, bufsize, len, 1)) |
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537 return FALSE; |
| 44 | 538 |
|
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539 (*buf)[*len] = ch; |
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540 (*len)++; |
|
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|
541 |
|
04cfdefc3253
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542 return TRUE; |
|
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543 } |
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544 |
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|
545 |
|
29
04cfdefc3253
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|
546 BOOL th_vputs(char **buf, size_t *bufsize, size_t *len, const char *str) |
|
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547 { |
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548 size_t slen; |
|
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549 if (str == NULL) |
|
29
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550 return FALSE; |
| 44 | 551 |
|
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552 slen = strlen(str); |
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553 if (!th_growbuf(buf, bufsize, len, slen)) |
|
29
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Matti Hamalainen <ccr@tnsp.org>
parents:
21
diff
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|
554 return FALSE; |
|
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changeset
|
555 |
|
32
7e0a2a125830
Use strcpy() instead of strcat() in th_vputs().
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31
diff
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|
556 strcpy(*buf + *len, str); |
|
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557 (*len) += slen; |
| 44 | 558 |
|
29
04cfdefc3253
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parents:
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|
559 return TRUE; |
|
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|
560 } |