man3/strspn.3

   1 .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
   2 .\"
   3 .\" Permission is granted to make and distribute verbatim copies of this
   4 .\" manual provided the copyright notice and this permission notice are
   5 .\" preserved on all copies.
   6 .\"
   7 .\" Permission is granted to copy and distribute modified versions of this
   8 .\" manual under the conditions for verbatim copying, provided that the
   9 .\" entire resulting derived work is distributed under the terms of a
  10 .\" permission notice identical to this one.
  11 .\"
  12 .\" Since the Linux kernel and libraries are constantly changing, this
  13 .\" manual page may be incorrect or out-of-date.  The author(s) assume no
  14 .\" responsibility for errors or omissions, or for damages resulting from
  15 .\" the use of the information contained herein.  The author(s) may not
  16 .\" have taken the same level of care in the production of this manual,
  17 .\" which is licensed free of charge, as they might when working
  18 .\" professionally.
  19 .\"
  20 .\" Formatted or processed versions of this manual, if unaccompanied by
  21 .\" the source, must acknowledge the copyright and authors of this work.
  22 .\"
  23 .\" References consulted:
  24 .\"     Linux libc source code
  25 .\"     Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
  26 .\"     386BSD man pages
  27 .\" Modified Sat Jul 24 17:57:50 1993 by Rik Faith (faith@cs.unc.edu)
  28 .TH STRSPN 3  1993-04-12 "" "Linux Programmer's Manual"
  29 .SH NAME
  30 strspn, strcspn \- search a string for a set of characters
  31 .SH SYNOPSIS
  32 .nf
  33 .B #include <string.h>
  34 .sp
  35 .BI "size_t strspn(const char *" s ", const char *" accept );
  36 .sp
  37 .BI "size_t strcspn(const char *" s ", const char *" reject );
  38 .fi
  39 .SH DESCRIPTION
  40 The \fBstrspn\fP() function calculates the length of the initial
  41 segment of \fIs\fP which consists entirely of characters in
  42 \fIaccept\fP.
  43 .PP
  44 The \fBstrcspn\fP() function calculates the length of the initial
  45 segment of \fIs\fP which consists entirely of characters not in
  46 \fIreject\fP.
  47 .SH "RETURN VALUE"
  48 The \fBstrspn\fP() function returns the number of characters in
  49 the initial segment of \fIs\fP which consist only of characters
  50 from \fIaccept\fP.
  51 .PP
  52 The \fBstrcspn\fP() function returns the number of characters in
  53 the initial segment of \fIs\fP which are not in the string
  54 \fIreject\fP.
  55 .SH "CONFORMING TO"
  56 SVID 3, POSIX, 4.3BSD, ISO 9899
  57 .SH "SEE ALSO"
  58 .BR index (3),
  59 .BR memchr (3),
  60 .BR rindex (3),
  61 .BR strchr (3),
  62 .BR strpbrk (3),
  63 .BR strsep (3),
  64 .BR strstr (3),
  65 .BR strtok (3),
  66 .BR wcsspn (3),
  67 .BR wcscspn (3)