1.\" Copyright (c) 1990, 1991 The Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" Chris Torek. 6.\" %sccs.include.redist.man% 7.\" 8.\" @(#)strspn.3 5.2 (Berkeley) 04/19/91 9.\" 10.Dd 11.Dt STRSPN 3 12.Os 13.Sh NAME 14.Nm strspn 15.Nd span a string 16.Sh SYNOPSIS 17.Fd #include <string.h> 18.Ft size_t 19.Fn strspn "const char *s" "const char *charset" 20.Sh DESCRIPTION 21The 22.Xr strcspn 23function 24spans the initial part of the null-terminated string 25.Fa s 26as long as the characters from 27.Fa s 28occur in string 29.Fa charset . 30.Sh RETURN VALUES 31The 32.Fn strspn 33function 34returns the number of characters spanned. 35.Sh SEE ALSO 36.Xr index 3 , 37.Xr memchr 3 , 38.Xr rindex 3 , 39.Xr strchr 3 , 40.Xr strcspn 3 , 41.Xr strpbrk 3 , 42.Xr strrchr 3 , 43.Xr strsep 3 , 44.Xr strstr 3 , 45.Xr strtok 3 46.Sh STANDARDS 47The 48.Fn strspn 49function 50conforms to 51.St -ansiC . 52