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strcspn(3) [xfree86 man page]

STRSPN(3)						     Linux Programmer's Manual							 STRSPN(3)

NAME
strspn, strcspn - get length of a prefix substring 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 in accept. 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 from accept. 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 | +--------------------+---------------+---------+ |strspn(), strcspn() | Thread safety | MT-Safe | +--------------------+---------------+---------+ CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD. SEE ALSO
index(3), memchr(3), rindex(3), strchr(3), string(3), strpbrk(3), strsep(3), strstr(3), strtok(3), wcscspn(3), wcsspn(3) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. 2015-08-08 STRSPN(3)

Check Out this Related Man Page

strspn(3)						     Library Functions Manual							 strspn(3)

NAME
strcspn, strspn - Returns length of initial segment of string LIBRARY
Standard C Library (libc.so, libc.a) SYNOPSIS
#include <string.h> size_t strcspn( const char *s1, const char *s2); size_t strspn( const char *s1, const char *s2); STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: strcspn(), strspn(): XSH4.2 Refer to the standards(5) reference page for more information about industry standards and associated tags. PARAMETERS
Points to a character string being checked for an initial segment. Points to a string containing a set of bytes that define the initial segment. DESCRIPTION
The strspn() function computes the length of the maximum initial segment of the string pointed to by the s1 parameter, which consists entirely of bytes from the string pointed to by the s2 parameter. The strcspn() function computes the byte length of the maximum initial segment of the string pointed to by the s1 parameter, which consists entirely of bytes that are not from the string pointed to by the s2 parameter. The strspn() and strcspn() functions treat the s2 parameter as a series of bytes; these functions do not treat a multibyte character as a single unit but rather as a series of separate bytes. There are no equivalent functions for multibyte character strings. The wcsspn() and wcscspn() functions provide the same functionality for wide character strings. RETURN VALUES
Upon successful completion, the strcspn(), and strspn() functions return the length of the string segment. [Tru64 UNIX] On error, a value of -1 cast to size_t is returned. RELATED INFORMATION
Functions: string(3), wcsspn(3)/wcscspn(3) Standards: standards(5) delim off strspn(3)
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