.\" Copyright (C) 2001 Information-technology Promotion Agency (IPA)
.\" Copyright (C) 2001-2011
.\"   National Institute of Advanced Industrial Science and Technology (AIST)
.\" This file is part of the m17n library documentation.
.\" Permission is granted to copy, distribute and/or modify this document
.\" under the terms of the GNU Free Documentation License, Version 1.2 or
.\" any later version published by the Free Software Foundation; with no
.\" Invariant Section, no Front-Cover Texts,
.\" and no Back-Cover Texts.  A copy of the license is included in the
.\" appendix entitled "GNU Free Documentation License".
.TH "mtext_from_data" 3m17n "12 Jan 2011" "Version 1.6.2" "The m17n Library" \" -*- nroff -*-
.ad l
.nh
.SH NAME
mtext_from_data \- Allocate a new M\-text with specified data. 


.SH SYNOPSIS
\fBMText\fP*
\fBmtext_from_data\fP (const void *
\fIdata\fP, int
\fInitems\fP, enum \fBMTextFormat\fP
\fIformat\fP)


.SH DESCRIPTION
Allocate a new M\-text with specified data. The
.ft B
mtext_from_data()
.ft R
function allocates a new M\-text whose character sequence is specified by array
.ft B
data
.ft R
of
.ft B
nitems
.ft R
elements.
.ft B
format
.ft R
specifies the format of
.ft B
data\fP.
.ft R
.PP
When
.ft B
format
.ft R
is either
.ft B
MTEXT_FORMAT_US_ASCII
.ft R
or
.ft B
MTEXT_FORMAT_UTF_8\fP,
.ft R
the contents of
.ft B
data
.ft R
must be of the type
.ft C
unsigned
.ft R
.ft C
char\fP,
.ft R
and
.ft B
nitems
.ft R
counts by byte.
.PP
When
.ft B
format
.ft R
is either
.ft B
MTEXT_FORMAT_UTF_16LE
.ft R
or
.ft B
MTEXT_FORMAT_UTF_16BE\fP,
.ft R
the contents of
.ft B
data
.ft R
must be of the type
.ft C
unsigned
.ft R
.ft C
short\fP,
.ft R
and
.ft B
nitems
.ft R
counts by unsigned short.
.PP
When
.ft B
format
.ft R
is either
.ft B
MTEXT_FORMAT_UTF_32LE
.ft R
or
.ft B
MTEXT_FORMAT_UTF_32BE\fP,
.ft R
the contents of
.ft B
data
.ft R
must be of the type
.ft C
unsigned\fP,
.ft R
and
.ft B
nitems
.ft R
counts by unsigned.
.PP
The character sequence of the M\-text is not modifiable. The contents of
.ft B
data
.ft R
must not be modified while the M\-text is alive.
.PP
The allocated M\-text will not be freed unless the user explicitly does so with the
.ft B
m17n_object_unref()
.ft R
function. Even in that case,
.ft B
data
.ft R
is not freed.
.PP
.SH RETURN VALUE
.PP
.RS 4
If the operation was successful,
.ft B
mtext_from_data()
.ft R
returns a pointer to the allocated M\-text. Otherwise it returns
.ft C
NULL
.ft R
and assigns an error code to the external variable
.ft B
merror_code\fP.
.ft R
.RE
.PP
.SH ERRORS
.PP
.RS 4
\fCMERROR_MTEXT
.ft R
.RE
.PP

.SH COPYRIGHT
Copyright (C) 2001 Information\-technology Promotion Agency (IPA)
.br
Copyright (C) 2001\-2011 National Institute of Advanced Industrial Science and Technology (AIST)
.br
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License 
<http://www.gnu.org/licenses/fdl.html>.