xtcalloc(3) [hpux man page]

XtCalloc()																XtCalloc()

Name
  XtCalloc - allocate memory for an array and initialize its bytes to zero.

Synopsis
  char *XtCalloc(num, size);
	 Cardinal num;
	 Cardinal size;

Inputs
  num	    Specifies the number of array elements to allocate.

  size	    Specifies the size of an array element in bytes.

Returns
  A pointer to allocated memory.

Description
  XtCalloc()  allocates  memory  for  an  array  of num elements each of size bytes and initializes each allocated byte to zero.  If there is
  insufficient memory, XtCalloc() terminates by calling XtErrorMsg().

Usage
  Note that in most cases, you will have to cast the return value of XtCalloc() to the type appropriate for the array elements you are	allo-
  cating.

  XtNew() and XtNewString() provide slightly higher-level approaches to memory allocation.

  The  function XtCalloc() is implemented by the Toolkit independently of the particular environment, so programs ported to a system not sup-
  porting calloc will still work.

See Also
  XtErrorMsg(1), XtFree(1), XtMalloc(1), XtNew(1), XtNewString(1), XtRealloc(1).

Xt - Memory Allocation															XtCalloc()

XtMalloc(3)							   XT FUNCTIONS 						       XtMalloc(3)

NAME

       XtMalloc, XtCalloc, XtRealloc, XtFree, XtNew, XtNewString - memory management functions

SYNTAX

       char *XtMalloc(Cardinal size);

       char *XtCalloc(Cardinal num, Cardinal size);

       char *XtRealloc(char *ptr, Cardinal num);

       void XtFree(char *ptr);

       type *XtNew(type);

       String XtNewString(String string);

ARGUMENTS

       num	 Specifies the number of bytes or array elements.

       ptr	 Specifies a pointer to the old storage or to the block of storage that is to be freed.

       size	 Specifies the size of an array element (in bytes) or the number of bytes desired.

       string	 Specifies a previously declared string.

       type	 Specifies a previously declared data type.

DESCRIPTION

       The 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, XtMalloc calls XtErrorMsg.

       The 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, XtCalloc calls XtErrorMsg.

       The 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, XtRealloc calls XtErrorMsg.
       If ptr is NULL, XtRealloc allocates the new storage without copying the old contents; that is, it simply calls XtMalloc.

       The XtFree function returns storage and allows it to be reused.	If ptr is NULL, XtFree returns immediately.

       XtNew returns a pointer to the allocated storage.  If there is insufficient memory to allocate the new block, XtNew calls XtErrorMsg.
       XtNew is a convenience macro that calls XtMalloc with the following arguments specified:

       ((type *) XtMalloc((unsigned) sizeof(type))

       XtNewString returns a pointer to the allocated storage.	If there is insufficient memory to allocate the new block, XtNewString calls XtEr-
       rorMsg.	XtNewString is a convenience macro that calls XtMalloc with the following arguments specified:

       (strcpy(XtMalloc((unsigned) strlen(str) + 1), str))

SEE ALSO

       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface

X Version 11							    libXt 1.0.5 						       XtMalloc(3)