Add a new strstrip() function to lib/string.c for removing leading and trailing whitespace from a string.
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| @@ -301,6 +301,36 @@ char *strnchr(const char *s, size_t count, int c) · 300 unmodified lines | ||
| 301 | 301 | EXPORT_SYMBOL(strnchr); |
| 302 | 302 | #endif |
| 303 | 303 | |
| 304 | +/** | |
| 305 | + * strstrip - Removes leading and trailing whitespace from @s. | |
| 306 | + * @s: The string to be stripped. | |
| 307 | + * | |
| 308 | + * Note that the first trailing whitespace is replaced with a %NUL-terminator | |
| 309 | + * in the given string @s. Returns a pointer to the first non-whitespace | |
| 310 | + * character in @s. | |
| 311 | + */ | |
| 312 | +char *strstrip(char *s) | |
| 313 | +{ | |
| 314 | + size_t size; | |
| 315 | + char *end; | |
| 316 | + | |
| 317 | + size = strlen(s); | |
| 318 | + | |
| 319 | + if (!size) | |
| 320 | + return s; | |
| 321 | + | |
| 322 | + end = s + size - 1; | |
| 323 | + while (end != s && isspace(*end)) | |
| 324 | + end--; | |
| 325 | + *(end + 1) = '\0'; | |
| 326 | + | |
| 327 | + while (*s && isspace(*s)) | |
| 328 | + s++; | |
| 329 | + | |
| 330 | + return s; | |
| 331 | +} | |
| 332 | +EXPORT_SYMBOL(strstrip); | |
| 333 | + | |
| 304 | 334 | #ifndef __HAVE_ARCH_STRLEN |
| 305 | 335 | /** |
| 306 | 336 | * strlen - Find the length of a string |