1.\" Copyright (c) 1990, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" Chris Torek and the American National Standards Committee X3, 6.\" on Information Processing Systems. 7.\" 8.\" %sccs.include.redist.man% 9.\" 10.\" @(#)strspn.3 8.1 (Berkeley) 06/04/93 11.\" 12.Dd 13.Dt STRSPN 3 14.Os 15.Sh NAME 16.Nm strspn 17.Nd span a string 18.Sh SYNOPSIS 19.Fd #include <string.h> 20.Ft size_t 21.Fn strspn "const char *s" "const char *charset" 22.Sh DESCRIPTION 23The 24.Fn strcspn 25function 26spans the initial part of the null-terminated string 27.Fa s 28as long as the characters from 29.Fa s 30occur in string 31.Fa charset . 32.Sh RETURN VALUES 33The 34.Fn strspn 35function 36returns the number of characters spanned. 37.Sh SEE ALSO 38.Xr index 3 , 39.Xr memchr 3 , 40.Xr rindex 3 , 41.Xr strchr 3 , 42.Xr strcspn 3 , 43.Xr strpbrk 3 , 44.Xr strrchr 3 , 45.Xr strsep 3 , 46.Xr strstr 3 , 47.Xr strtok 3 48.Sh STANDARDS 49The 50.Fn strspn 51function 52conforms to 53.St -ansiC . 54