154 lines
4.7 KiB
Groff
154 lines
4.7 KiB
Groff
.\" Copyright 1993 X Consortium
|
|
.\"
|
|
.\" Permission is hereby granted, free of charge, to any person obtaining
|
|
.\" a copy of this software and associated documentation files (the
|
|
.\" "Software"), to deal in the Software without restriction, including
|
|
.\" without limitation the rights to use, copy, modify, merge, publish,
|
|
.\" distribute, sublicense, and/or sell copies of the Software, and to
|
|
.\" permit persons to whom the Software is furnished to do so, subject to
|
|
.\" the following conditions:
|
|
.\"
|
|
.\" The above copyright notice and this permission notice shall be
|
|
.\" included in all copies or substantial portions of the Software.
|
|
.\"
|
|
.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
.\" EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
.\" IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
.\" OTHER DEALINGS IN THE SOFTWARE.
|
|
.\"
|
|
.\" Except as contained in this notice, the name of the X Consortium shall
|
|
.\" not be used in advertising or otherwise to promote the sale, use or
|
|
.\" other dealings in this Software without prior written authorization
|
|
.\" from the X Consortium.
|
|
.\"
|
|
.ds tk X Toolkit
|
|
.ds xT X Toolkit Intrinsics \- C Language Interface
|
|
.ds xI Intrinsics
|
|
.ds xW X Toolkit Athena Widgets \- C Language Interface
|
|
.ds xL Xlib \- C Language X Interface
|
|
.ds xC Inter-Client Communication Conventions Manual
|
|
.ds Rn 3
|
|
.ds Vn 2.2
|
|
.hw XtNew-String wid-get
|
|
.na
|
|
.TH XtMalloc __libmansuffix__ __xorgversion__ "XT FUNCTIONS"
|
|
.SH NAME
|
|
XtMalloc, XtCalloc, XtRealloc, XtFree, XtNew, XtNewString \- memory management functions
|
|
.SH SYNTAX
|
|
#include <X11/Intrinsic.h>
|
|
.HP
|
|
char *XtMalloc(Cardinal \fIsize\fP);
|
|
.HP
|
|
char *XtCalloc(Cardinal \fInum\fP, Cardinal \fIsize\fP);
|
|
.HP
|
|
char *XtRealloc(char *\fIptr\fP, Cardinal \fInum\fP);
|
|
.HP
|
|
void XtFree(char *\fIptr\fP);
|
|
.HP
|
|
\fItype\fP *XtNew(\fItype\fP);
|
|
.HP
|
|
String XtNewString(String \fIstring\fP);
|
|
.HP
|
|
Cardinal XtAsprintf(char **\fInew_string\fP, const char *\fIformat\fP, ...);
|
|
.SH ARGUMENTS
|
|
.IP \fInum\fP 1i
|
|
Specifies the number of bytes or array elements.
|
|
.IP \fIptr\fP 1i
|
|
Specifies a pointer to the old storage or to the block of storage that is to be freed.
|
|
.IP \fIsize\fP 1i
|
|
Specifies the size of an array element (in bytes) or the number of bytes
|
|
desired.
|
|
.IP \fIstring\fP 1i
|
|
Specifies a previously declared string.
|
|
.IP \fItype\fP 1i
|
|
Specifies a previously declared data type.
|
|
.IP \fInew_string\fP 1i
|
|
Specifies a pointer to write a newly allocated string to.
|
|
.IP \fIformat\fP 1i
|
|
Specifies a formatting string as defined by sprintf(3c)
|
|
.SH DESCRIPTION
|
|
The
|
|
.B XtMalloc
|
|
functions returns a pointer to a block of storage of at least
|
|
the specified size bytes.
|
|
If there is insufficient memory to allocate the new block,
|
|
.B XtMalloc
|
|
calls
|
|
.BR XtErrorMsg .
|
|
.LP
|
|
The
|
|
.B XtCalloc
|
|
function allocates space for the specified number of array elements
|
|
of the specified size and initializes the space to zero.
|
|
If there is insufficient memory to allocate the new block,
|
|
.B XtCalloc
|
|
calls
|
|
.BR XtErrorMsg .
|
|
.LP
|
|
The
|
|
.B XtRealloc
|
|
function changes the size of a block of storage (possibly moving it).
|
|
Then, it copies the old contents (or as much as will fit) into the new block
|
|
and frees the old block.
|
|
If there is insufficient memory to allocate the new block,
|
|
.B XtRealloc
|
|
calls
|
|
.BR XtErrorMsg .
|
|
If ptr is NULL,
|
|
.B XtRealloc
|
|
allocates the new storage without copying the old contents;
|
|
that is, it simply calls
|
|
.BR XtMalloc .
|
|
.LP
|
|
The
|
|
.B XtFree
|
|
function returns storage and allows it to be reused.
|
|
If ptr is NULL,
|
|
.B XtFree
|
|
returns immediately.
|
|
.LP
|
|
.B XtNew
|
|
returns a pointer to the allocated storage.
|
|
If there is insufficient memory to allocate the new block,
|
|
.B XtNew
|
|
calls
|
|
.BR XtErrorMsg .
|
|
.B XtNew
|
|
is a convenience macro that calls
|
|
.B XtMalloc
|
|
with the following arguments specified:
|
|
.LP
|
|
.RS .5i
|
|
.ft CW
|
|
((type *) XtMalloc((unsigned) sizeof(type))
|
|
.ft R
|
|
.RE
|
|
.LP
|
|
.B XtNewString
|
|
returns a pointer to a new string which is a duplicate of
|
|
.IR string .
|
|
If there is insufficient memory to allocate the new block, or the argument is NULL
|
|
.B XtNewString
|
|
returns NULL. The memory can be freed with
|
|
.BR XtFree .
|
|
.LP
|
|
The
|
|
.B XtAsprintf
|
|
function allocates space for a string large enough to hold the string
|
|
specified by the sprintf(3c) format pattern when used with the remaining
|
|
arguments, and fills it with the formatted results.
|
|
The address of the allocated string is placed into the pointer passed as ret.
|
|
The length of the string (not including the terminating null byte) is returned.
|
|
If there is insufficient memory to allocate the new block,
|
|
.B XtAsprintf
|
|
calls
|
|
.BR XtErrorMsg .
|
|
.SH "SEE ALSO"
|
|
.br
|
|
\fI\*(xT\fP
|
|
.br
|
|
\fI\*(xL\fP
|