List_Init.c
1.33 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
/*
* List_Init.c --
*
* Source code for the List_Init library procedure.
*
* Copyright 1988 Regents of the University of California
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. The University of California
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*/
#include <stdio.h>
#include "simtypes.h"
#include "list.h"
#include "sim_error.h"
/*
* ----------------------------------------------------------------------------
*
* List_Init --
*
* Initialize a header pointer to point to an empty list. The List_Links
* structure must already be allocated.
*
* Results:
* None.
*
* Side effects:
* The header's pointers are modified to point to itself.
*
* ----------------------------------------------------------------------------
*/
/* Parameter: Pointer to a List_Links structure to be header */
void
List_Init(register List_Links* headerPtr)
{
ASSERT( headerPtr );
if (headerPtr == (List_Links *) NIL || !headerPtr) {
List_Error("List_Init: invalid header pointer.\n");
}
headerPtr->nextPtr = headerPtr;
headerPtr->prevPtr = headerPtr;
}