194 lines
5.6 KiB
Groff
194 lines
5.6 KiB
Groff
.\" $NetBSD: prop_string.3,v 1.8 2011/02/26 12:56:36 wiz Exp $
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.\"
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.\" Copyright (c) 2006 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Jason R. Thorpe.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd January 21, 2008
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.Dt PROP_STRING 3
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.Os
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.Sh NAME
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.Nm prop_string ,
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.Nm prop_string_create ,
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.Nm prop_string_create_cstring ,
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.Nm prop_string_create_cstring_nocopy ,
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.Nm prop_string_copy ,
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.Nm prop_string_copy_mutable ,
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.Nm prop_string_size ,
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.Nm prop_string_mutable ,
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.Nm prop_string_cstring ,
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.Nm prop_string_cstring_nocopy ,
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.Nm prop_string_append ,
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.Nm prop_string_append_cstring ,
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.Nm prop_string_equals ,
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.Nm prop_string_equals_cstring
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.Nd string value property object
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.Sh LIBRARY
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.Lb libprop
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.Sh SYNOPSIS
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.In prop/proplib.h
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.\"
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.Ft prop_string_t
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.Fn prop_string_create "void"
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.Ft prop_string_t
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.Fn prop_string_create_cstring "const char *cstring"
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.Ft prop_string_t
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.Fn prop_string_create_cstring_nocopy "const char *cstring"
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.\"
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.Ft prop_string_t
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.Fn prop_string_copy "prop_string_t string"
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.Ft prop_string_t
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.Fn prop_string_copy_mutable "prop_string_t string"
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.\"
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.Ft size_t
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.Fn prop_string_size "prop_string_t string"
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.Ft bool
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.Fn prop_string_mutable "prop_string_t string"
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.\"
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.Ft char *
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.Fn prop_string_cstring "prop_string_t string"
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.Ft const char *
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.Fn prop_string_cstring_nocopy "prop_string_t string"
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.\"
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.Ft bool
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.Fn prop_string_append "prop_string_t str1" "prop_string_t str2"
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.Ft bool
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.Fn prop_string_append_cstring "prop_string_t string" "const char *cstring"
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.\"
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.Ft bool
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.Fn prop_string_equals "prop_string_t str1" "prop_string_t str2"
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.Ft bool
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.Fn prop_string_equals_cstring "prop_string_t string" "const char *cstring"
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.Sh DESCRIPTION
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The
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.Nm prop_string
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family of functions operate on a string value property object type.
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.Bl -tag -width "xxxxx"
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.It Fn prop_string_create "void"
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Create an empty mutable string.
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Returns
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.Dv NULL
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on failure.
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.It Fn prop_string_create_cstring "const char *cstring"
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Create a mutable string that contains a copy of
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.Fa cstring .
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Returns
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.Dv NULL
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on failure.
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.It Fn prop_string_create_cstring_nocopy "const char *cstring"
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Create an immutable string that contains a reference to
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.Fa cstring .
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Returns
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.Dv NULL
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on failure.
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.It Fn prop_string_copy "prop_string_t string"
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Copy a string.
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If the string being copied is an immutable external C string reference,
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then the copy is also immutable and references the same external C string.
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Returns
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.Dv NULL
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on failure.
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.It Fn prop_string_copy_mutable "prop_string_t string"
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Copy a string, always creating a mutable copy.
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Returns
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.Dv NULL
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on failure.
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.It Fn prop_string_size "prop_string_t string"
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Returns the size of the string, not including the terminating NUL.
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If the supplied object isn't a string, zero is returned.
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.It Fn prop_string_mutable "prop_string_t string"
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Returns
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.Dv true
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if the string is mutable.
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If the supplied object isn't a string,
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.Dv false
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is returned.
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.It Fn prop_string_cstring "prop_string_t string"
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Returns a copy of the string's contents as a C string.
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The caller is responsible for freeing the returned buffer.
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.Pp
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In user space, the buffer is allocated using
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.Xr malloc 3 .
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In the kernel, the buffer is allocated using
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.Xr malloc 9
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using the malloc type
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.Dv M_TEMP .
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.Pp
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Returns
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.Dv NULL
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on failure.
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.It Fn prop_string_cstring_nocopy "prop_string_t string"
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Returns an immutable reference to the contents of the string as a
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C string.
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If the supplied object isn't a string,
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.Dv NULL
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is returned.
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.It Fn prop_string_append "prop_string_t str1" "prop_string_t str2"
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Append the contents of
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.Fa str2
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to
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.Fa str1 ,
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which must be mutable.
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Returns
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.Dv true
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upon success and
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.Dv false
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otherwise.
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.It Fn prop_string_append_cstring "prop_string_t string" "const char *cstring"
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Append the C string
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.Fa cstring
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to
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.Fa string ,
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which must be mutable.
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Returns
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.Dv true
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upon success and
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.Dv false
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otherwise.
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.It Fn prop_string_equals "prop_string_t str1" "prop_string_t str2"
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Returns
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.Dv true
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if the two string objects are equivalent.
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.It Fn prop_string_equals_cstring "prop_string_t string" "const char *cstring"
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Returns
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.Dv true
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if the string's value is equivalent to
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.Fa cstring .
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.El
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.Sh SEE ALSO
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.Xr prop_array 3 ,
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.Xr prop_bool 3 ,
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.Xr prop_data 3 ,
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.Xr prop_dictionary 3 ,
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.Xr prop_number 3 ,
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.Xr prop_object 3 ,
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.Xr proplib 3
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.Sh HISTORY
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The
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.Nm proplib
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property container object library first appeared in
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.Nx 4.0 .
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