Libc-583.tar.gz

[apple/libc.git] / string / string.3

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.\"     @(#)string.3	8.2 (Berkeley) 12/11/93
.\" $FreeBSD: src/lib/libc/string/string.3,v 1.13 2002/10/19 13:41:22 tjr Exp $
.\"
.Dd December 11, 1993
.Dt STRING 3
.Os
.Sh NAME
.Nm index ,
.Nm rindex ,
.Nm stpcpy ,
.Nm strcasecmp ,
.Nm strcat ,
.Nm strchr ,
.Nm strcmp ,
.Nm strcpy ,
.Nm strcspn ,
.Nm strerror ,
.Nm strlen ,
.Nm strncasecmp ,
.Nm strncat ,
.Nm strncmp ,
.Nm strncpy ,
.Nm strpbrk ,
.Nm strrchr ,
.Nm strsep ,
.Nm strspn ,
.Nm strstr ,
.Nm strtok
.Nd string specific functions
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In strings.h
.Ft char *
.Fo index
.Fa "const char *s"
.Fa "int c"
.Fc
.Ft char *
.Fo rindex
.Fa "const char *s"
.Fa "int c"
.Fc
.Ft int
.Fo strcasecmp
.Fa "const char *s1"
.Fa "const char *s2"
.Fc
.Ft int
.Fo strncasecmp
.Fa "const char *s1"
.Fa "const char *s2"
.Fa "size_t n"
.Fc
.In string.h
.Ft char *
.Fo stpcpy
.Fa "char *dst"
.Fa "const char *src"
.Fc
.Ft char *
.Fo strcat
.Fa "char *restrict s1"
.Fa "const char *restrict s2"
.Fc
.Ft char *
.Fo strchr
.Fa "const char *s"
.Fa "int c"
.Fc
.Ft int
.Fo strcmp
.Fa "const char *s1"
.Fa "const char *s2"
.Fc
.Ft char *
.Fo strcpy
.Fa "char *restrict s1"
.Fa "const char *restrict s2"
.Fc
.Ft size_t
.Fo strcspn
.Fa "const char *s1"
.Fa "const char *s2"
.Fc
.Ft char *
.Fo strerror
.Fa "int errnum"
.Fc
.Ft size_t
.Fo strlen
.Fa "const char *s"
.Fc
.Ft char *
.Fo strncat
.Fa "char *restrict s1"
.Fa "const char *restrict s2"
.Fa "size_t n"
.Fc
.Ft int
.Fo strncmp
.Fa "const char *s1"
.Fa "const char *s2"
.Fa "size_t n"
.Fc
.Ft char *
.Fo strncpy
.Fa "char *restrict s1"
.Fa "const char *restrict s2"
.Fa "size_t n"
.Fc
.Ft char *
.Fo strpbrk
.Fa "const char *s1"
.Fa "const char *s2"
.Fc
.Ft char *
.Fo strrchr
.Fa "const char *s"
.Fa "int c"
.Fc
.Ft char *
.Fo strsep
.Fa "char **stringp"
.Fa "const char *delim"
.Fc
.Ft size_t
.Fo strspn
.Fa "const char *s1"
.Fa "const char *s2"
.Fc
.Ft char *
.Fo strstr
.Fa "const char *s1"
.Fa "const char *s2"
.Fc
.Ft char *
.Fo strtok
.Fa "char *restrict s1"
.Fa "const char *restrict s2"
.Fc
.Sh DESCRIPTION
The string
functions manipulate strings that are terminated by a
null byte.
.Pp
See the specific manual pages for more information.
For manipulating variable length generic objects as byte
strings (without the null byte check), see
.Xr bstring 3 .
.Pp
Except as noted in their specific manual pages,
the string functions do not test the destination
for size limitations.
.Sh SEE ALSO
.Xr bstring 3 ,
.Xr index 3 ,
.Xr rindex 3 ,
.Xr stpcpy 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 STANDARDS
The
.Fn strcat ,
.Fn strncat ,
.Fn strchr ,
.Fn strrchr ,
.Fn strcmp ,
.Fn strncmp ,
.Fn strcpy ,
.Fn strncpy ,
.Fn strerror ,
.Fn strlen ,
.Fn strpbrk ,
.Fn strspn ,
.Fn strcspn ,
.Fn strstr ,
and
.Fn strtok
functions
conform to
.St -isoC .