Mercurial > hg > th-libs
annotate th_string.c @ 29:04cfdefc3253
th_vputs() and th_vputch() now return a boolean value, TRUE if operation was successful, FALSE if it failed. If result was FALSE, the buffer pointer may now be NULL.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Sat, 11 Jun 2011 05:03:58 +0300 |
parents | 1f7d8693fda8 |
children | 10d2dc143e4b |
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 /* Compare two strings ignoring case [strcasecmp, strncasecmp] |
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100 */ |
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101 int th_strcasecmp(const char * str1, const char * str2) |
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102 { |
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103 const char *s1 = str1, *s2 = str2; |
10 | 104 assert(str1 != NULL); |
105 assert(str2 != NULL); | |
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106 |
10 | 107 if (str1 == str2) |
108 return 0; | |
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109 |
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110 while (*s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) { |
10 | 111 s1++; |
112 s2++; | |
113 } | |
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114 |
10 | 115 return (th_tolower(*s1) - th_tolower(*s2)); |
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116 } |
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117 |
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118 |
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119 int th_strncasecmp(const char * str1, const char * str2, size_t n) |
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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 |
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128 while (n > 0 && *s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) { |
10 | 129 s1++; |
130 s2++; | |
131 n--; | |
132 } | |
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133 |
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134 return n > 0 ? (th_tolower(*s1) - th_tolower(*s2)) : 0; |
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135 } |
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136 |
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137 |
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138 /* Remove all occurences of control characters, in-place. |
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139 * Resulting string is always shorter or same length than original. |
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140 */ |
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141 void th_strip_ctrlchars(char * str) |
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142 { |
10 | 143 char *i, *j; |
144 assert(str != NULL); | |
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145 |
10 | 146 i = str; |
147 j = str; | |
148 while (*i) { | |
149 if (!th_iscntrl(*i)) | |
150 *(j++) = *i; | |
151 i++; | |
152 } | |
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153 |
10 | 154 *j = 0; |
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155 } |
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156 |
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157 |
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158 /* Copy a given string over in *result. |
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159 */ |
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160 int th_pstrcpy(char ** result, const char * str) |
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161 { |
10 | 162 assert(result != NULL); |
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163 |
10 | 164 if (str == NULL) |
165 return -1; | |
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166 |
10 | 167 th_free(*result); |
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168 if ((*result = th_malloc(strlen(str) + 1)) == NULL) |
10 | 169 return -2; |
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170 |
10 | 171 strcpy(*result, str); |
172 return 0; | |
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173 } |
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174 |
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175 |
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176 /* Concatenates a given string into string pointed by *result. |
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177 */ |
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178 int th_pstrcat(char ** result, const char * str) |
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179 { |
10 | 180 assert(result != NULL); |
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181 |
10 | 182 if (str == NULL) |
183 return -1; | |
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184 |
10 | 185 if (*result != NULL) { |
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186 *result = th_realloc(*result, strlen(*result) + strlen(str) + 1); |
10 | 187 if (*result == NULL) |
188 return -1; | |
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189 |
10 | 190 strcat(*result, str); |
191 } else { | |
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192 *result = th_malloc(strlen(str) + 1); |
10 | 193 if (*result == NULL) |
194 return -1; | |
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195 |
10 | 196 strcpy(*result, str); |
197 } | |
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198 |
10 | 199 return 0; |
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200 } |
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201 |
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202 |
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203 /* Find next non-whitespace character in string. |
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204 * Updates iPos into the position of such character and |
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205 * returns pointer to the string. |
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206 */ |
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207 const char *th_findnext(const char * str, size_t * pos) |
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208 { |
10 | 209 assert(str != NULL); |
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210 |
10 | 211 /* Terminating NULL-character is not whitespace! */ |
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212 while (th_isspace(str[*pos])) |
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213 (*pos)++; |
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214 return &str[*pos]; |
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215 } |
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216 |
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217 |
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218 /* Find next sep-character from string |
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219 */ |
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220 const char *th_findsep(const char * str, size_t * pos, char sep) |
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221 { |
10 | 222 assert(str != NULL); |
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223 |
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224 while (str[*pos] && str[*pos] != sep) |
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225 (*pos)++; |
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226 |
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227 return &str[*pos]; |
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228 } |
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229 |
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230 |
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231 /* Find next sep- or whitespace from string |
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232 */ |
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233 const char *th_findseporspace(const char * str, size_t * pos, char sep) |
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234 { |
10 | 235 assert(str != NULL); |
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236 |
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237 while (!th_isspace(str[*pos]) && str[*pos] != sep) |
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238 (*pos)++; |
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239 |
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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 /* Compare a string to a pattern. Case-SENSITIVE version. |
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245 * The matching pattern can consist of any normal characters plus |
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246 * wildcards ? and *. "?" matches any character and "*" matches |
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247 * any number of characters. |
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248 */ |
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249 BOOL th_strmatch(const char * str, const char * pattern) |
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250 { |
10 | 251 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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252 const char *tmpPattern = NULL; |
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253 |
10 | 254 /* Check given pattern and string */ |
255 if (str == NULL || pattern == NULL) | |
256 return FALSE; | |
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257 |
10 | 258 /* Start comparision */ |
259 do { | |
260 didMatch = FALSE; | |
261 switch (*pattern) { | |
262 case '?': | |
263 /* Any single character matches */ | |
264 if (*str) { | |
265 didMatch = TRUE; | |
266 pattern++; | |
267 str++; | |
268 } | |
269 break; | |
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270 |
10 | 271 case '*': |
272 didMatch = TRUE; | |
273 pattern++; | |
274 if (!*pattern) | |
275 isEnd = TRUE; | |
276 isAnyMode = TRUE; | |
277 tmpPattern = pattern; | |
278 break; | |
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279 |
10 | 280 case 0: |
281 if (isAnyMode) { | |
282 if (*str) | |
283 str++; | |
284 else | |
285 isEnd = TRUE; | |
286 } else { | |
287 if (*str) { | |
288 if (tmpPattern) { | |
289 isAnyMode = TRUE; | |
290 pattern = tmpPattern; | |
291 } else | |
292 didMatch = FALSE; | |
293 } else | |
294 isEnd = TRUE; | |
295 } | |
296 break; | |
297 default: | |
298 if (isAnyMode) { | |
299 if (*pattern == *str) { | |
300 isAnyMode = FALSE; | |
301 didMatch = TRUE; | |
302 } else { | |
303 if (*str) { | |
304 didMatch = TRUE; | |
305 str++; | |
306 } | |
307 } | |
308 } else { | |
309 if (*pattern == *str) { | |
310 didMatch = TRUE; | |
311 if (*pattern) | |
312 pattern++; | |
313 if (*str) | |
314 str++; | |
315 } else { | |
316 if (tmpPattern) { | |
317 didMatch = TRUE; | |
318 isAnyMode = TRUE; | |
319 pattern = tmpPattern; | |
320 } | |
321 } | |
322 } | |
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323 |
10 | 324 if (!*str && !*pattern) |
325 isEnd = TRUE; | |
326 break; | |
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327 |
10 | 328 } /* switch */ |
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329 |
10 | 330 } while (didMatch && !isEnd); |
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331 |
10 | 332 return didMatch; |
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333 } |
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334 |
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335 |
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336 /* Compare a string to a pattern. Case-INSENSITIVE version. |
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337 */ |
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338 BOOL th_strcasematch(const char * str, const char * pattern) |
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339 { |
10 | 340 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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341 const char *tmpPattern = NULL; |
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342 |
10 | 343 /* Check given pattern and string */ |
344 if (str == NULL || pattern == NULL) | |
345 return FALSE; | |
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346 |
10 | 347 /* Start comparision */ |
348 do { | |
349 switch (*pattern) { | |
350 case '?': | |
351 /* Any single character matches */ | |
352 if (*str) { | |
353 pattern++; | |
354 str++; | |
355 } else | |
356 didMatch = FALSE; | |
357 break; | |
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358 |
10 | 359 case '*': |
360 pattern++; | |
361 if (!*pattern || *pattern == '?') | |
362 isEnd = TRUE; | |
363 isAnyMode = TRUE; | |
364 tmpPattern = pattern; | |
365 break; | |
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366 |
10 | 367 case 0: |
368 if (isAnyMode) { | |
369 if (*str) | |
370 str++; | |
371 else | |
372 isEnd = TRUE; | |
373 } else { | |
374 if (*str) { | |
375 if (tmpPattern) { | |
376 isAnyMode = TRUE; | |
377 pattern = tmpPattern; | |
378 } else | |
379 didMatch = FALSE; | |
380 } else | |
381 isEnd = TRUE; | |
382 } | |
383 break; | |
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384 |
10 | 385 default: |
386 if (isAnyMode) { | |
387 if (th_tolower(*pattern) == th_tolower(*str)) { | |
388 isAnyMode = FALSE; | |
389 } else { | |
390 if (*str) | |
391 str++; | |
392 else | |
393 didMatch = FALSE; | |
394 } | |
395 } else { | |
396 if (th_tolower(*pattern) == th_tolower(*str)) { | |
397 if (*pattern) | |
398 pattern++; | |
399 if (*str) | |
400 str++; | |
401 } else { | |
402 if (tmpPattern) { | |
403 isAnyMode = TRUE; | |
404 pattern = tmpPattern; | |
405 } else | |
406 didMatch = FALSE; | |
407 } | |
408 } | |
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409 |
10 | 410 if (!*str && !*pattern) |
411 isEnd = TRUE; | |
412 break; | |
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413 |
10 | 414 } /* switch */ |
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415 |
10 | 416 } while (didMatch && !isEnd); |
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417 |
10 | 418 return didMatch; |
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419 } |
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420 |
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421 |
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422 int th_get_hex_triplet(const char *str) |
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423 { |
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424 const char *p = str; |
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425 int len, val = 0; |
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426 |
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427 for (len = 0; *p && len < 6; p++, len++) { |
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428 if (*p >= '0' && *p <= '9') { |
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429 val *= 16; val += (*p - '0'); |
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430 } else if (*p >= 'A' && *p <= 'F') { |
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431 val *= 16; val += (*p - 'A') + 10; |
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432 } else if (*p >= 'a' && *p <= 'f') { |
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433 val *= 16; val += (*p - 'a') + 10; |
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434 } else |
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435 return -1; |
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436 } |
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Various cleanups, additions and removals.
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437 |
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438 return (len == 6) ? val : -1; |
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Various cleanups, additions and removals.
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439 } |
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Various cleanups, additions and removals.
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440 |
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Various cleanups, additions and removals.
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441 |
21
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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442 static BOOL th_growbuf(char **buf, size_t *bufsize, size_t *len, size_t grow) |
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443 { |
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444 assert(buf != NULL); |
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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445 assert(bufsize != NULL); |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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446 assert(len != NULL); |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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447 |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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448 if (*buf == NULL) |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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449 *bufsize = 0; |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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450 |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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451 if (*buf == NULL || *len + grow >= *bufsize) { |
1f7d8693fda8
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452 *bufsize += grow + TH_BUFGROW; |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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453 *buf = (char *) th_realloc(*buf, *bufsize); |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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454 if (*buf == NULL) |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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455 return FALSE; |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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456 } |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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457 return TRUE; |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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458 } |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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|
459 |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
Matti Hamalainen <ccr@tnsp.org>
parents:
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|
460 |
29
04cfdefc3253
th_vputs() and th_vputch() now return a boolean value, TRUE if operation was successful, FALSE if it failed. If result was FALSE, the buffer pointer may now be NULL.
Matti Hamalainen <ccr@tnsp.org>
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461 BOOL th_vputch(char **buf, size_t *bufsize, size_t *len, const char ch) |
21
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Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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462 { |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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463 if (!th_growbuf(buf, bufsize, len, 1)) |
29
04cfdefc3253
th_vputs() and th_vputch() now return a boolean value, TRUE if operation was successful, FALSE if it failed. If result was FALSE, the buffer pointer may now be NULL.
Matti Hamalainen <ccr@tnsp.org>
parents:
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464 return FALSE; |
21
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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465 |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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466 (*buf)[*len] = ch; |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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467 (*len)++; |
29
04cfdefc3253
th_vputs() and th_vputch() now return a boolean value, TRUE if operation was successful, FALSE if it failed. If result was FALSE, the buffer pointer may now be NULL.
Matti Hamalainen <ccr@tnsp.org>
parents:
21
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|
468 |
04cfdefc3253
th_vputs() and th_vputch() now return a boolean value, TRUE if operation was successful, FALSE if it failed. If result was FALSE, the buffer pointer may now be NULL.
Matti Hamalainen <ccr@tnsp.org>
parents:
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|
469 return TRUE; |
21
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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parents:
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470 } |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
Matti Hamalainen <ccr@tnsp.org>
parents:
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|
471 |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
Matti Hamalainen <ccr@tnsp.org>
parents:
14
diff
changeset
|
472 |
29
04cfdefc3253
th_vputs() and th_vputch() now return a boolean value, TRUE if operation was successful, FALSE if it failed. If result was FALSE, the buffer pointer may now be NULL.
Matti Hamalainen <ccr@tnsp.org>
parents:
21
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|
473 BOOL th_vputs(char **buf, size_t *bufsize, size_t *len, const char *str) |
21
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
Matti Hamalainen <ccr@tnsp.org>
parents:
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474 { |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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475 size_t slen; |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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476 if (str == NULL) |
29
04cfdefc3253
th_vputs() and th_vputch() now return a boolean value, TRUE if operation was successful, FALSE if it failed. If result was FALSE, the buffer pointer may now be NULL.
Matti Hamalainen <ccr@tnsp.org>
parents:
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|
477 return FALSE; |
21
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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parents:
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|
478 |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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479 slen = strlen(str); |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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|
480 if (!th_growbuf(buf, bufsize, len, slen)) |
29
04cfdefc3253
th_vputs() and th_vputch() now return a boolean value, TRUE if operation was successful, FALSE if it failed. If result was FALSE, the buffer pointer may now be NULL.
Matti Hamalainen <ccr@tnsp.org>
parents:
21
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changeset
|
481 return FALSE; |
21
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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parents:
14
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changeset
|
482 |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
Matti Hamalainen <ccr@tnsp.org>
parents:
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|
483 strcat(*buf + *len, str); |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
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|
484 (*len) += slen; |
29
04cfdefc3253
th_vputs() and th_vputch() now return a boolean value, TRUE if operation was successful, FALSE if it failed. If result was FALSE, the buffer pointer may now be NULL.
Matti Hamalainen <ccr@tnsp.org>
parents:
21
diff
changeset
|
485 |
04cfdefc3253
th_vputs() and th_vputch() now return a boolean value, TRUE if operation was successful, FALSE if it failed. If result was FALSE, the buffer pointer may now be NULL.
Matti Hamalainen <ccr@tnsp.org>
parents:
21
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changeset
|
486 return TRUE; |
21
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
Matti Hamalainen <ccr@tnsp.org>
parents:
14
diff
changeset
|
487 } |
1f7d8693fda8
Add functions for growing a string/buffer and concatenating characters and/or other strings to it.
Matti Hamalainen <ccr@tnsp.org>
parents:
14
diff
changeset
|
488 |