2 #include "linux/string.h"
7 * Parse (\d+)(b|B|kb|KB|mb|MB|gb|GB|tb|TB) (e.g. "256MB")
8 * and return its numeric value
10 s64 perf_atoll(const char *str)
19 length = strtoll(str, &p, 10);
30 /* two-letter suffices */
44 /* we want the cases to match */
46 if (strcmp(p, "b") != 0)
49 if (strcmp(p, "B") != 0)
59 * Helper function for splitting a string into an argv-like array.
60 * originally copied from lib/argv_split.c
62 static const char *skip_sep(const char *cp)
64 while (*cp && isspace(*cp))
70 static const char *skip_arg(const char *cp)
72 while (*cp && !isspace(*cp))
78 static int count_argc(const char *str)
94 * argv_free - free an argv
95 * @argv - the argument vector to be freed
97 * Frees an argv and the strings it points to.
99 void argv_free(char **argv)
102 for (p = argv; *p; p++)
109 * argv_split - split a string at whitespace, returning an argv
110 * @str: the string to be split
111 * @argcp: returned argument count
113 * Returns an array of pointers to strings which are split out from
114 * @str. This is performed by strictly splitting on white-space; no
115 * quote processing is performed. Multiple whitespace characters are
116 * considered to be a single argument separator. The returned array
117 * is always NULL-terminated. Returns NULL on memory allocation
120 char **argv_split(const char *str, int *argcp)
122 int argc = count_argc(str);
123 char **argv = zalloc(sizeof(*argv) * (argc+1));
143 t = strndup(p, str-p);
159 /* Character class matching */
160 static bool __match_charclass(const char *pat, char c, const char **npat)
162 bool complement = false, ret = true;
168 if (*pat++ == c) /* First character is special */
171 while (*pat && *pat != ']') { /* Matching */
172 if (*pat == '-' && *(pat + 1) != ']') { /* Range */
173 if (*(pat - 1) <= c && c <= *(pat + 1))
175 if (*(pat - 1) > *(pat + 1))
178 } else if (*pat++ == c)
186 while (*pat && *pat != ']') /* Searching closing */
191 return complement ? !ret : ret;
197 /* Glob/lazy pattern matching */
198 static bool __match_glob(const char *str, const char *pat, bool ignore_space,
201 while (*str && *pat && *pat != '*') {
203 /* Ignore spaces for lazy matching */
213 if (*pat == '?') { /* Matches any single character */
217 } else if (*pat == '[') /* Character classes/Ranges */
218 if (__match_charclass(pat + 1, *str, &pat)) {
223 else if (*pat == '\\') /* Escaped char match as normal char */
226 if (tolower(*str) != tolower(*pat))
228 } else if (*str != *pat)
233 /* Check wild card */
237 if (!*pat) /* Tail wild card matches all */
240 if (__match_glob(str++, pat, ignore_space, case_ins))
243 return !*str && !*pat;
247 * strglobmatch - glob expression pattern matching
248 * @str: the target string to match
249 * @pat: the pattern string to match
251 * This returns true if the @str matches @pat. @pat can includes wildcards
252 * ('*','?') and character classes ([CHARS], complementation and ranges are
253 * also supported). Also, this supports escape character ('\') to use special
254 * characters as normal character.
256 * Note: if @pat syntax is broken, this always returns false.
258 bool strglobmatch(const char *str, const char *pat)
260 return __match_glob(str, pat, false, false);
263 bool strglobmatch_nocase(const char *str, const char *pat)
265 return __match_glob(str, pat, false, true);
269 * strlazymatch - matching pattern strings lazily with glob pattern
270 * @str: the target string to match
271 * @pat: the pattern string to match
273 * This is similar to strglobmatch, except this ignores spaces in
276 bool strlazymatch(const char *str, const char *pat)
278 return __match_glob(str, pat, true, false);
282 * strtailcmp - Compare the tail of two strings
283 * @s1: 1st string to be compared
284 * @s2: 2nd string to be compared
286 * Return 0 if whole of either string is same as another's tail part.
288 int strtailcmp(const char *s1, const char *s2)
292 while (--i1 >= 0 && --i2 >= 0) {
293 if (s1[i1] != s2[i2])
294 return s1[i1] - s2[i2];
300 * strxfrchar - Locate and replace character in @s
301 * @s: The string to be searched/changed.
302 * @from: Source character to be replaced.
303 * @to: Destination character.
305 * Return pointer to the changed string.
307 char *strxfrchar(char *s, char from, char to)
311 while ((p = strchr(p, from)) != NULL)
318 * ltrim - Removes leading whitespace from @s.
319 * @s: The string to be stripped.
321 * Return pointer to the first non-whitespace character in @s.
327 while (len && isspace(*s)) {
336 * rtrim - Removes trailing whitespace from @s.
337 * @s: The string to be stripped.
339 * Note that the first trailing whitespace is replaced with a %NUL-terminator
340 * in the given string @s. Returns @s.
344 size_t size = strlen(s);
351 while (end >= s && isspace(*end))
358 char *asprintf_expr_inout_ints(const char *var, bool in, size_t nints, int *ints)
361 * FIXME: replace this with an expression using log10() when we
362 * find a suitable implementation, maybe the one in the dvb drivers...
364 * "%s == %d || " = log10(MAXINT) * 2 + 8 chars for the operators
366 size_t size = nints * 28 + 1; /* \0 */
367 size_t i, printed = 0;
368 char *expr = malloc(size);
371 const char *or_and = "||", *eq_neq = "==";
379 for (i = 0; i < nints; ++i) {
381 goto out_err_overflow;
384 printed += snprintf(e + printed, size - printed, " %s ", or_and);
385 printed += scnprintf(e + printed, size - printed,
386 "%s %s %d", var, eq_neq, ints[i]);