.\" Copyright (c) 1990, 1991, 1993
.\"	The Regents of the University of California.  All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" Chris Torek.
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\"     @(#)string.3	8.2 (Berkeley) 12/11/93
.\" %FreeBSD: src/lib/libc/string/string.3,v 1.6.2.4 2001/12/14 18:33:59 ru Exp %
.\"
.\" $FreeBSD$
.\"
.Dd December 11, 1993
.Dt STRING 3
.Os
.Sh 名称
.Nm strcat ,
.Nm strncat ,
.Nm strchr ,
.Nm strrchr ,
.Nm strcmp ,
.Nm strncmp ,
.Nm strcasecmp,
.Nm strncasecmp ,
.Nm strcpy ,
.Nm strncpy ,
.Nm strerror ,
.Nm strlen ,
.Nm strpbrk ,
.Nm strsep,
.Nm strspn ,
.Nm strcspn ,
.Nm strstr ,
.Nm strtok ,
.Nm index ,
.Nm rindex
.Nd 文字列に特有の関数
.Sh ライブラリ
.Lb libc
.Sh 書式
.In string.h
.Ft char *
.Fn strcat "char *s" "const char * append"
.Ft char *
.Fn strncat "char *s" "const char *append" "size_t count"
.Ft char *
.Fn strchr "const char *s" "int c"
.Ft char *
.Fn strrchr "const char *s" "int c"
.Ft int
.Fn strcmp "const char *s1" "const char *s2"
.Ft int
.Fn strncmp "const char *s1" "const char *s2" "size_t count"
.Ft int
.Fn strcasecmp "const char *s1" "const char *s2"
.Ft int
.Fn strncasecmp "const char *s1" "const char *s2" "size_t count"
.Ft char *
.Fn strcpy "char *dst" "const char *src"
.Ft char *
.Fn strncpy "char *dst" "const char *src" "size_t count"
.Ft char *
.Fn strerror "int errno"
.Ft size_t
.Fn strlen "const char *s"
.Ft char *
.Fn strpbrk "const char *s" "const char *charset"
.Ft char *
.Fn strsep "char **stringp" "const char *delim"
.Ft size_t
.Fn strspn "const char *s" "const char *charset"
.Ft size_t
.Fn strcspn "const char *s" "const char *charset"
.Ft char *
.Fn strstr "const char *big" "const char *little"
.Ft char *
.Fn strtok "char *s" "const char *delim"
.Ft char *
.Fn index "const char *s" "int c"
.Ft char *
.Fn rindex "const char *s" "int c"
.Sh 解説
これらの文字列関数は、ヌルバイトで終了する文字列を操作します。
.Pp
詳しくは、個々の関数についてのマニュアルページを参照してください。
可変長の汎用オブジェクトを (ヌルバイトのチェックなしの) バイト列
として操作することについては、
.Xr bstring 3
を参照してください。
.Pp
個々のマニュアルページに記されたものを除いては、
文字列関数はサイズの制限についての検査は行いません。
.Sh 関連項目
.Xr bstring 3 ,
.Xr index 3 ,
.Xr rindex 3 ,
.Xr strcasecmp 3 ,
.Xr strcat 3 ,
.Xr strchr 3 ,
.Xr strcmp 3 ,
.Xr strcpy 3 ,
.Xr strcspn 3 ,
.Xr strerror 3 ,
.Xr strlen 3 ,
.Xr strpbrk 3 ,
.Xr strrchr 3 ,
.Xr strsep 3 ,
.Xr strspn 3 ,
.Xr strstr 3 ,
.Xr strtok 3
.Sh 規格
.Fn strcat ,
.Fn strncat ,
.Fn strchr ,
.Fn strrchr ,
.Fn strcmp ,
.Fn strncmp ,
.Fn strcpy ,
.Fn strncpy ,
.Fn strerror ,
.Fn strlen ,
.Fn strpbrk ,
.Fn strsep ,
.Fn strspn ,
.Fn strcspn ,
.Fn strstr ,
および
.Fn strtok
関数は、
.St -isoC
に適合しています。