| .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) |
| .\" |
| .\" %%%LICENSE_START(VERBATIM) |
| .\" Permission is granted to make and distribute verbatim copies of this |
| .\" manual provided the copyright notice and this permission notice are |
| .\" preserved on all copies. |
| .\" |
| .\" Permission is granted to copy and distribute modified versions of this |
| .\" manual under the conditions for verbatim copying, provided that the |
| .\" entire resulting derived work is distributed under the terms of a |
| .\" permission notice identical to this one. |
| .\" |
| .\" Since the Linux kernel and libraries are constantly changing, this |
| .\" manual page may be incorrect or out-of-date. The author(s) assume no |
| .\" responsibility for errors or omissions, or for damages resulting from |
| .\" the use of the information contained herein. The author(s) may not |
| .\" have taken the same level of care in the production of this manual, |
| .\" which is licensed free of charge, as they might when working |
| .\" professionally. |
| .\" |
| .\" Formatted or processed versions of this manual, if unaccompanied by |
| .\" the source, must acknowledge the copyright and authors of this work. |
| .\" %%%LICENSE_END |
| .\" |
| .\" References consulted: |
| .\" Linux libc source code |
| .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) |
| .\" 386BSD man pages |
| .\" Modified Sat Jul 24 17:57:50 1993 by Rik Faith (faith@cs.unc.edu) |
| .TH STRSPN 3 2015-08-08 "" "Linux Programmer's Manual" |
| .SH NAME |
| strspn, strcspn \- get length of a prefix substring |
| .SH SYNOPSIS |
| .nf |
| .B #include <string.h> |
| .sp |
| .BI "size_t strspn(const char *" s ", const char *" accept ); |
| .sp |
| .BI "size_t strcspn(const char *" s ", const char *" reject ); |
| .fi |
| .SH DESCRIPTION |
| The |
| .BR strspn () |
| function calculates the length (in bytes) of the initial |
| segment of |
| .I s |
| which consists entirely of bytes in |
| .IR accept . |
| .PP |
| The |
| .BR strcspn () |
| function calculates the length of the initial |
| segment of |
| .I s |
| which consists entirely of bytes not in |
| .IR reject . |
| .SH RETURN VALUE |
| The |
| .BR strspn () |
| function returns the number of bytes in |
| the initial segment of |
| .I s |
| which consist only of bytes |
| from |
| .IR accept . |
| .PP |
| The |
| .BR strcspn () |
| function returns the number of bytes in |
| the initial segment of |
| .I s |
| which are not in the string |
| .IR reject . |
| .SH ATTRIBUTES |
| For an explanation of the terms used in this section, see |
| .BR attributes (7). |
| .TS |
| allbox; |
| lbw19 lb lb |
| l l l. |
| Interface Attribute Value |
| T{ |
| .BR strspn (), |
| .BR strcspn () |
| T} Thread safety MT-Safe |
| .TE |
| .SH CONFORMING TO |
| POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD. |
| .SH SEE ALSO |
| .BR index (3), |
| .BR memchr (3), |
| .BR rindex (3), |
| .BR strchr (3), |
| .BR string (3), |
| .BR strpbrk (3), |
| .BR strsep (3), |
| .BR strstr (3), |
| .BR strtok (3), |
| .BR wcscspn (3), |
| .BR wcsspn (3) |