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);

Cardinal XtAsprintf(String *new_string, const char *format, ...);

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.

new_string
    Specifies a pointer to write a newly allocated string to.

format
    Specifies a formatting string as defined by sprintf(3c)

DESCRIPTION
The 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, calls

The 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, calls

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

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

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

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

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

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

The 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, calls

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