найти подстроку (locate a substring)
Имя (Name)
strstr, strcasestr - locate a substring
Синопсис (Synopsis)
#include <string.h>
char *strstr(const char *haystack, const char *needle);
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <string.h>
char *strcasestr(const char *haystack, const char *needle);
Описание (Description)
The strstr() function finds the first occurrence of the substring
needle in the string haystack. The terminating null bytes ('\0')
are not compared.
The strcasestr() function is like strstr(), but ignores the case
of both arguments.
Возвращаемое значение (Return value)
These functions return a pointer to the beginning of the located
substring, or NULL if the substring is not found.
If needle is the empty string, the return value is always
haystack itself.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────────────────────┬───────────────┬────────────────┐
│Interface │ Attribute │ Value │
├───────────────────────────────┼───────────────┼────────────────┤
│strstr() │ Thread safety │ MT-Safe │
├───────────────────────────────┼───────────────┼────────────────┤
│strcasestr() │ Thread safety │ MT-Safe locale │
└───────────────────────────────┴───────────────┴────────────────┘
Стандарты (Conforming to)
strstr(): POSIX.1-2001, POSIX.1-2008, C89, C99.
The strcasestr() function is a nonstandard extension.
Смотри также (See also)
index(3), memchr(3), memmem(3), rindex(3), strcasecmp(3),
strchr(3), string(3), strpbrk(3), strsep(3), strspn(3),
strtok(3), wcsstr(3)
