Add nsswitch support.
[dragonfly.git] / lib / libc / string / strxfrm.3
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984263bc
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1.\" Copyright (c) 1990, 1991, 1993
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4.\" This code is derived from software contributed to Berkeley by
5.\" Chris Torek and the American National Standards Committee X3,
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36.\" @(#)strxfrm.3 8.1 (Berkeley) 6/4/93
37.\" $FreeBSD: src/lib/libc/string/strxfrm.3,v 1.11.2.3 2001/12/14 18:33:59 ru Exp $
1de703da 38.\" $DragonFly: src/lib/libc/string/strxfrm.3,v 1.2 2003/06/17 04:26:47 dillon Exp $
984263bc
MD
39.\"
40.Dd June 4, 1993
41.Dt STRXFRM 3
42.Os
43.Sh NAME
44.Nm strxfrm
45.Nd transform a string under locale
46.Sh LIBRARY
47.Lb libc
48.Sh SYNOPSIS
49.In string.h
50.Ft size_t
51.Fn strxfrm "char *dst" "const char *src" "size_t n"
52.Sh DESCRIPTION
53The
54.Fn strxfrm
55function transforms a null-terminated string pointed to by
56.Fa src
57according to the current locale collation if any,
58then copies the transformed string
59into
60.Fa dst .
61Not more than
62.Fa n
63characters are copied into
64.Fa dst ,
65including the terminating null character added.
66If
67.Fa n
68is set to 0
69(it helps to determine an actual size needed
70for transformation),
71.Fa dst
72is permitted to be a NULL pointer.
73.Pp
74Comparing two strings using
75.Fn strcmp
76after
77.Fn strxfrm
78is equal to comparing
79two original strings with
80.Fn strcoll .
81.Sh RETURN VALUES
82Upon successful completion,
83.Fn strxfrm
84returns the length of the transformed string not including
85the terminating null character.
86If this value is
87.Fa n
88or more, the contents of
89.Fa dst
90are indeterminate.
91.Sh SEE ALSO
92.Xr setlocale 3 ,
93.Xr strcmp 3 ,
94.Xr strcoll 3
95.Sh STANDARDS
96The
97.Fn strxfrm
98function
99conforms to
100.St -isoC .