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 | EXPORT_SYMBOL(strnchr); | 301 | EXPORT_SYMBOL(strnchr); |
| 302 | #endif | 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 | #ifndef __HAVE_ARCH_STRLEN | 334 | #ifndef __HAVE_ARCH_STRLEN |
| 305 | /** | 335 | /** |
| 306 | * strlen - Find the length of a string | 336 | * strlen - Find the length of a string |