Mercurial > hg > th-libs
annotate th_string.c @ 167:7638fa9d191f
Add th_get_boolean() function.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Wed, 18 Feb 2015 21:13:44 +0200 |
parents | 578d9298cc1e |
children | a06a87b771ce |
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 |
144 | 4 * (C) Copyright 2002-2015 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 */ |
49
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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 |
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 |
90
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52 /* Like strdup, but trims whitespace from stringImplementation of strdup() with a NULL check |
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53 */ |
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54 char *th_strdup_trim(const char *s, const int flags) |
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55 { |
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56 char *res; |
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57 size_t start, end, len; |
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58 if (s == NULL) |
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59 return NULL; |
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60 |
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61 len = strlen(s); |
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62 if (flags & TH_TRIM_START) |
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63 for (start = 0; start < len && th_isspace(s[start]); start++); |
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64 else |
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65 start = 0; |
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66 |
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67 if (flags & TH_TRIM_END) |
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68 for (end = len; end > start && th_isspace(s[end]); end--); |
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69 else |
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70 end = len; |
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71 |
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72 len = end - start + 1; |
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73 if ((res = th_malloc(len + 1)) == NULL) |
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74 return NULL; |
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75 |
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76 memcpy(res, s, len); |
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77 res[len] = 0; |
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78 return res; |
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79 } |
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80 |
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81 |
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82 /* Simulate a sprintf() that allocates memory |
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83 */ |
43 | 84 char *th_strdup_vprintf(const char *fmt, va_list args) |
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85 { |
133 | 86 int size = 64; |
87 char *buf, *tmp; | |
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88 |
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89 if ((buf = th_malloc(size)) == NULL) |
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90 return NULL; |
44 | 91 |
39 | 92 while (1) |
93 { | |
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94 int n; |
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95 va_list ap; |
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96 va_copy(ap, args); |
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97 n = vsnprintf(buf, size, fmt, ap); |
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98 va_end(ap); |
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99 |
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100 if (n > -1 && n < size) |
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101 return buf; |
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102 if (n > -1) |
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103 size = n + 1; |
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104 else |
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105 size *= 2; |
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106 |
133 | 107 if ((tmp = th_realloc(buf, size)) == NULL) |
108 { | |
109 th_free(buf); | |
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110 return NULL; |
133 | 111 } |
112 else | |
113 buf = tmp; | |
10 | 114 } |
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115 } |
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116 |
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117 |
43 | 118 char *th_strdup_printf(const char *fmt, ...) |
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119 { |
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120 char *res; |
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121 va_list ap; |
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122 |
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123 va_start(ap, fmt); |
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124 res = th_strdup_vprintf(fmt, ap); |
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125 va_end(ap); |
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126 |
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127 return res; |
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128 } |
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129 |
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130 |
30
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131 void th_pstr_vprintf(char **buf, const char *fmt, va_list ap) |
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132 { |
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133 char *tmp = th_strdup_vprintf(fmt, ap); |
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134 th_free(*buf); |
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135 *buf = tmp; |
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136 } |
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137 |
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138 |
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139 void th_pstr_printf(char **buf, const char *fmt, ...) |
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140 { |
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141 char *tmp; |
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142 va_list ap; |
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143 |
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144 va_start(ap, fmt); |
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145 tmp = th_strdup_vprintf(fmt, ap); |
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146 va_end(ap); |
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147 |
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148 th_free(*buf); |
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149 *buf = tmp; |
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150 } |
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151 |
88 | 152 |
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153 /* Compare two strings ignoring case [strcasecmp, strncasecmp] |
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154 */ |
43 | 155 int th_strcasecmp(const char *str1, const char *str2) |
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156 { |
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157 const char *s1 = str1, *s2 = str2; |
10 | 158 assert(str1 != NULL); |
159 assert(str2 != NULL); | |
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160 |
10 | 161 if (str1 == str2) |
162 return 0; | |
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163 |
39 | 164 while (*s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) |
165 { | |
10 | 166 s1++; |
167 s2++; | |
168 } | |
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169 |
88 | 170 return th_tolower(*s1) - th_tolower(*s2); |
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171 } |
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172 |
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173 |
43 | 174 int th_strncasecmp(const char *str1, const char *str2, size_t n) |
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175 { |
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176 const char *s1 = str1, *s2 = str2; |
10 | 177 assert(str1 != NULL); |
178 assert(str2 != NULL); | |
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179 |
10 | 180 if (str1 == str2) |
181 return 0; | |
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182 |
39 | 183 while (n > 0 && *s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) |
184 { | |
10 | 185 s1++; |
186 s2++; | |
187 n--; | |
188 } | |
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189 |
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190 return n > 0 ? (th_tolower(*s1) - th_tolower(*s2)) : 0; |
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191 } |
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192 |
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193 |
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194 /* Check if end of the given string str matches needle |
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195 * case-insensitively, return pointer to start of the match, |
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196 * if found, NULL otherwise. |
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197 */ |
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198 char *th_strrcasecmp(char *str, const char *needle) |
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199 { |
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200 if (str == NULL || needle == NULL) |
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201 return NULL; |
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202 |
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203 const size_t |
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204 slen = strlen(str), |
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205 nlen = strlen(needle); |
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206 |
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207 if (slen < nlen) |
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208 return NULL; |
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209 |
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210 if (th_strcasecmp(str - nlen - 1, needle) == 0) |
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211 return str - nlen - 1; |
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212 else |
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213 return NULL; |
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214 } |
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215 |
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216 |
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217 /* Remove all occurences of control characters, in-place. |
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218 * Resulting string is always shorter or same length than original. |
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219 */ |
43 | 220 void th_strip_ctrlchars(char *str) |
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221 { |
10 | 222 char *i, *j; |
223 assert(str != NULL); | |
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224 |
10 | 225 i = str; |
226 j = str; | |
39 | 227 while (*i) |
228 { | |
10 | 229 if (!th_iscntrl(*i)) |
230 *(j++) = *i; | |
231 i++; | |
232 } | |
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233 |
10 | 234 *j = 0; |
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235 } |
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236 |
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237 |
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238 /* Copy a given string over in *result. |
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239 */ |
43 | 240 int th_pstrcpy(char **result, const char *str) |
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241 { |
10 | 242 assert(result != NULL); |
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243 |
10 | 244 if (str == NULL) |
245 return -1; | |
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246 |
10 | 247 th_free(*result); |
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248 if ((*result = th_malloc(strlen(str) + 1)) == NULL) |
10 | 249 return -2; |
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250 |
10 | 251 strcpy(*result, str); |
252 return 0; | |
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253 } |
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254 |
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255 |
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256 /* Concatenates a given string into string pointed by *result. |
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257 */ |
43 | 258 int th_pstrcat(char **result, const char *str) |
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259 { |
10 | 260 assert(result != NULL); |
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261 |
10 | 262 if (str == NULL) |
263 return -1; | |
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264 |
39 | 265 if (*result != NULL) |
266 { | |
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267 *result = th_realloc(*result, strlen(*result) + strlen(str) + 1); |
10 | 268 if (*result == NULL) |
269 return -1; | |
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270 |
10 | 271 strcat(*result, str); |
39 | 272 } |
273 else | |
274 { | |
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275 *result = th_malloc(strlen(str) + 1); |
10 | 276 if (*result == NULL) |
277 return -1; | |
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278 |
10 | 279 strcpy(*result, str); |
280 } | |
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281 |
10 | 282 return 0; |
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283 } |
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284 |
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285 |
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286 /* Find next non-whitespace character in string. |
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287 * Updates iPos into the position of such character and |
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288 * returns pointer to the string. |
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289 */ |
43 | 290 const char *th_findnext(const char *str, size_t *pos) |
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291 { |
10 | 292 assert(str != NULL); |
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293 |
129 | 294 // Terminating NULL-character is not whitespace! |
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295 while (th_isspace(str[*pos])) |
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296 (*pos)++; |
39 | 297 |
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298 return &str[*pos]; |
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299 } |
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300 |
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301 |
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302 /* Find next sep-character from string |
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303 */ |
43 | 304 const char *th_findsep(const char *str, size_t *pos, char sep) |
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305 { |
10 | 306 assert(str != NULL); |
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307 |
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308 while (str[*pos] && str[*pos] != sep) |
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309 (*pos)++; |
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310 |
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311 return &str[*pos]; |
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312 } |
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313 |
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314 |
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315 /* Find next sep- or whitespace from string |
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316 */ |
43 | 317 const char *th_findseporspace(const char *str, size_t *pos, char sep) |
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318 { |
10 | 319 assert(str != NULL); |
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320 |
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321 while (!th_isspace(str[*pos]) && str[*pos] != sep) |
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322 (*pos)++; |
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323 |
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324 return &str[*pos]; |
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325 } |
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326 |
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327 |
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328 /* Compare a string to a pattern. Case-SENSITIVE version. |
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329 * The matching pattern can consist of any normal characters plus |
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330 * wildcards ? and *. "?" matches any character and "*" matches |
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331 * any number of characters. |
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332 */ |
43 | 333 BOOL th_strmatch(const char *str, const char *pattern) |
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334 { |
10 | 335 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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336 const char *tmpPattern = NULL; |
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337 |
129 | 338 // Check given pattern and string |
10 | 339 if (str == NULL || pattern == NULL) |
340 return FALSE; | |
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341 |
129 | 342 // Start comparision |
10 | 343 do { |
344 didMatch = FALSE; | |
39 | 345 switch (*pattern) |
346 { | |
10 | 347 case '?': |
129 | 348 // Any single character matches |
39 | 349 if (*str) |
350 { | |
10 | 351 didMatch = TRUE; |
352 pattern++; | |
353 str++; | |
354 } | |
355 break; | |
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356 |
10 | 357 case '*': |
358 didMatch = TRUE; | |
359 pattern++; | |
360 if (!*pattern) | |
361 isEnd = TRUE; | |
362 isAnyMode = TRUE; | |
363 tmpPattern = pattern; | |
364 break; | |
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365 |
10 | 366 case 0: |
39 | 367 if (isAnyMode) |
368 { | |
10 | 369 if (*str) |
370 str++; | |
371 else | |
372 isEnd = TRUE; | |
39 | 373 } |
374 else | |
375 { | |
376 if (*str) | |
377 { | |
378 if (tmpPattern) | |
379 { | |
10 | 380 isAnyMode = TRUE; |
381 pattern = tmpPattern; | |
39 | 382 } |
383 else | |
10 | 384 didMatch = FALSE; |
44 | 385 } |
386 else | |
10 | 387 isEnd = TRUE; |
388 } | |
389 break; | |
390 default: | |
39 | 391 if (isAnyMode) |
392 { | |
393 if (*pattern == *str) | |
394 { | |
10 | 395 isAnyMode = FALSE; |
396 didMatch = TRUE; | |
39 | 397 } |
398 else | |
399 { | |
400 if (*str) | |
401 { | |
10 | 402 didMatch = TRUE; |
403 str++; | |
404 } | |
405 } | |
39 | 406 } |
407 else | |
408 { | |
409 if (*pattern == *str) | |
410 { | |
10 | 411 didMatch = TRUE; |
412 if (*pattern) | |
413 pattern++; | |
414 if (*str) | |
415 str++; | |
39 | 416 } |
417 else | |
418 { | |
419 if (tmpPattern) | |
420 { | |
10 | 421 didMatch = TRUE; |
422 isAnyMode = TRUE; | |
423 pattern = tmpPattern; | |
424 } | |
425 } | |
426 } | |
0
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427 |
10 | 428 if (!*str && !*pattern) |
429 isEnd = TRUE; | |
430 break; | |
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431 |
129 | 432 } // switch |
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433 |
10 | 434 } while (didMatch && !isEnd); |
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435 |
10 | 436 return didMatch; |
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437 } |
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438 |
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439 |
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440 /* Compare a string to a pattern. Case-INSENSITIVE version. |
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441 */ |
43 | 442 BOOL th_strcasematch(const char *str, const char *pattern) |
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443 { |
10 | 444 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
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445 const char *tmpPattern = NULL; |
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446 |
129 | 447 // Check given pattern and string |
10 | 448 if (str == NULL || pattern == NULL) |
449 return FALSE; | |
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450 |
129 | 451 // Start comparision |
10 | 452 do { |
453 switch (*pattern) { | |
454 case '?': | |
129 | 455 // Any single character matches |
39 | 456 if (*str) |
457 { | |
10 | 458 pattern++; |
459 str++; | |
44 | 460 } |
461 else | |
10 | 462 didMatch = FALSE; |
463 break; | |
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464 |
10 | 465 case '*': |
466 pattern++; | |
467 if (!*pattern || *pattern == '?') | |
468 isEnd = TRUE; | |
469 isAnyMode = TRUE; | |
470 tmpPattern = pattern; | |
471 break; | |
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472 |
10 | 473 case 0: |
39 | 474 if (isAnyMode) |
475 { | |
10 | 476 if (*str) |
477 str++; | |
478 else | |
479 isEnd = TRUE; | |
39 | 480 } |
481 else | |
482 { | |
483 if (*str) | |
484 { | |
485 if (tmpPattern) | |
486 { | |
10 | 487 isAnyMode = TRUE; |
488 pattern = tmpPattern; | |
39 | 489 } |
490 else | |
10 | 491 didMatch = FALSE; |
44 | 492 } |
493 else | |
10 | 494 isEnd = TRUE; |
495 } | |
496 break; | |
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497 |
10 | 498 default: |
39 | 499 if (isAnyMode) |
500 { | |
501 if (th_tolower(*pattern) == th_tolower(*str)) | |
502 { | |
10 | 503 isAnyMode = FALSE; |
39 | 504 } |
505 else | |
506 { | |
10 | 507 if (*str) |
508 str++; | |
509 else | |
510 didMatch = FALSE; | |
511 } | |
39 | 512 } |
513 else | |
514 { | |
515 if (th_tolower(*pattern) == th_tolower(*str)) | |
516 { | |
10 | 517 if (*pattern) |
518 pattern++; | |
519 if (*str) | |
520 str++; | |
39 | 521 } |
522 else | |
523 { | |
524 if (tmpPattern) | |
525 { | |
10 | 526 isAnyMode = TRUE; |
527 pattern = tmpPattern; | |
39 | 528 } |
529 else | |
10 | 530 didMatch = FALSE; |
531 } | |
532 } | |
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533 |
10 | 534 if (!*str && !*pattern) |
535 isEnd = TRUE; | |
39 | 536 |
10 | 537 break; |
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538 |
129 | 539 } // switch |
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540 |
10 | 541 } while (didMatch && !isEnd); |
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542 |
10 | 543 return didMatch; |
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544 } |
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545 |
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546 |
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547 int th_get_hex_triplet(const char *str) |
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548 { |
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549 const char *p = str; |
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550 int len, val = 0; |
44 | 551 |
39 | 552 for (len = 0; *p && len < 6; p++, len++) |
553 { | |
554 if (*p >= '0' && *p <= '9') | |
555 { | |
556 val *= 16; | |
557 val += (*p - '0'); | |
558 } | |
559 else if (*p >= 'A' && *p <= 'F') | |
560 { | |
561 val *= 16; | |
562 val += (*p - 'A') + 10; | |
563 } | |
564 else if (*p >= 'a' && *p <= 'f') | |
565 { | |
566 val *= 16; | |
567 val += (*p - 'a') + 10; | |
568 } | |
569 else | |
14
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570 return -1; |
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571 } |
44 | 572 |
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573 return (len == 6) ? val : -1; |
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574 } |
162
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575 |
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576 |
167
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577 BOOL th_get_boolean(const char *str, BOOL *value) |
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578 { |
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579 if (!th_strcasecmp(str, "yes") || |
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580 !th_strcasecmp(str, "true") || |
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581 !th_strcasecmp(str, "1")) |
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582 { |
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583 *value = TRUE; |
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584 return TRUE; |
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585 } |
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586 else |
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587 if (!th_strcasecmp(str, "no") || |
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588 !th_strcasecmp(str, "false") || |
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589 !th_strcasecmp(str, "0")) |
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590 { |
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591 *value = FALSE; |
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592 return TRUE; |
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593 } |
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594 else |
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595 return FALSE; |
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596 } |
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597 |
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598 |
162
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599 static void th_pad(FILE *outFile, int count) |
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600 { |
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601 while (count--) |
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602 fputc(' ', outFile); |
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603 } |
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604 |
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605 |
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606 void th_print_wrap(FILE *fh, const char *str, int spad, int rpad, int width) |
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607 { |
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608 size_t pos = 0; |
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609 BOOL first = TRUE; |
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610 |
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611 while (str[pos]) |
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612 { |
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613 // Pre-pad line |
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614 int linelen = first ? spad : rpad; |
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615 th_pad(fh, first ? 0 : rpad); |
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616 first = FALSE; |
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617 |
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618 // Skip whitespace at line start |
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619 while (th_isspace(str[pos]) || str[pos] == '\n') pos++; |
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620 |
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621 // Handle each word |
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622 while (str[pos] && str[pos] != '\n') |
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623 { |
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624 size_t next; |
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625 int wlen; |
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626 |
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627 // Find word length and next break |
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628 for (wlen = 0, next = pos; str[next] && !th_isspace(str[next]) && str[next] != '\n'; next++, wlen++); |
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629 |
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630 // Check if we have too much of text? |
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631 if (linelen + wlen >= width) |
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632 break; |
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633 |
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634 // Print what we have |
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635 for (;pos < next; pos++, linelen++) |
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636 fputc(str[pos], fh); |
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637 |
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638 // Check if we are at end of input or hard linefeed |
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639 if (str[next] == '\n' || str[next] == 0) |
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640 break; |
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641 else |
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642 { |
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643 fputc(str[pos], fh); |
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644 pos++; |
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645 linelen++; |
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646 } |
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647 } |
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648 fprintf(fh, "\n"); |
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649 } |
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650 } |
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651 |
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652 |