Name
strspn, strcspn - get length of a prefix substringLibrary
Standard C library ( libc ", " -lc )Synopsis
#include <string.h> size_t strspn(const char *" s ", const char * accept );
size_t strcspn(const char *" s ", const char * reject );
Description
The strspn() function calculates the length (in bytes) of the initial segment of s which consists entirely of bytes inaccept. The strcspn() function calculates the length of the initial segment of s which consists entirely of bytes not in reject.
Return Value
The strspn() function returns the number of bytes in the initial segment of s which consist only of bytes fromaccept. The strcspn() function returns the number of bytes in the initial segment of s which are not in the string reject.
Attributes
For an explanation of the terms used in this section, see attributes(7).| Interface | Attribute | Value |
| T} | Thread safety | MT-Safe |