string/strcspn.3

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  36 .\"     @(#)strcspn.3   8.1 (Berkeley) 6/4/93
  37 .\" $FreeBSD: src/lib/libc/string/strcspn.3,v 1.7 2001/10/01 16:09:00 ru Exp $
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  39 .Dd June 4, 1993
  40 .Dt STRCSPN 3
  41 .Os
  42 .Sh NAME
  43 .Nm strcspn
  44 .Nd span the complement of a string
  45 .Sh LIBRARY
  46 .Lb libc
  47 .Sh SYNOPSIS
  48 .In string.h
  49 .Ft size_t
  50 .Fn strcspn "const char *s" "const char *charset"
  51 .Sh DESCRIPTION
  52 The
  53 .Fn strcspn
  54 function
  55 spans the initial part of the null-terminated string
  56 .Fa s
  57 as long as the characters from
  58 .Fa s
  59 do not occur in string
  60 .Fa charset
  61 (it
  62 spans the
  63 .Em complement
  64 of
  65 .Fa charset ) .
  66 .Sh RETURN VALUES
  67 The
  68 .Fn strcspn
  69 function
  70 returns the number of characters spanned.
  71 .Sh SEE ALSO
  72 .Xr memchr 3 ,
  73 .Xr strchr 3 ,
  74 .Xr strpbrk 3 ,
  75 .Xr strrchr 3 ,
  76 .Xr strsep 3 ,
  77 .Xr strspn 3 ,
  78 .Xr strstr 3 ,
  79 .Xr strtok 3
  80 .Sh STANDARDS
  81 The
  82 .Fn strcspn
  83 function
  84 conforms to
  85 .St -isoC .