| strspn(3P, 3p) | get length of a substring |
| strspn, strcspn(3) | get length of a prefix substring |
| string, stpcpy, index, rindex, strcasecmp, strcat, strchr, strcmp, strcoll, strcpy, strcspn, strdup, strfry, strlen, strncasecmp, strncat, strncmp, strncpy, strpbrk, strrchr, strsep, strspn, strstr, strtok, strxfrm(3) | string operations |
| strspn(3) | Library Functions Manual | strspn(3) |
strspn, strcspn - get length of a prefix substring
Standard C library (libc, -lc)
#include <string.h>
size_t strspn(const char *s, const char *accept); size_t strcspn(const char *s, const char *reject);
The strspn() function calculates the length (in bytes) of the initial segment of s which consists entirely of bytes in accept.
The strcspn() function calculates the length of the initial segment of s which consists entirely of bytes not in reject.
The strspn() function returns the number of bytes in the initial segment of s which consist only of bytes from accept.
The strcspn() function returns the number of bytes in the initial segment of s which are not in the string reject.
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| strspn (), strcspn () | Thread safety | MT-Safe |
C11, POSIX.1-2008.
POSIX.1-2001, C89, SVr4, 4.3BSD.
memchr(3), strchr(3), string(3), strpbrk(3), strsep(3), strstr(3), strtok(3), wcscspn(3), wcsspn(3)
| 2023-07-20 | Linux man-pages 6.05.01 |