Linux 2.6 - man page for strspn (linux section 3posix)
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STRSPN(P) POSIX Programmer's Manual STRSPN(P)
strspn - get length of a substring
size_t strspn(const char *s1, const char *s2);
The strspn() function shall compute the length (in bytes) of the maximum initial segment
of the string pointed to by s1 which consists entirely of bytes from the string pointed to
The strspn() function shall return the length of s1; no return value is reserved to indi-
cate an error.
No errors are defined.
The following sections are informative.
strcspn() , the Base Definitions volume of IEEE Std 1003.1-2001, <string.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE Std
1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System
Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and The Open Group
Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 STRSPN(P)
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