cv/mgflib/object.c

#ifndef lint
static const char       RCSid[] = "$Id: object.c,v 1.6 2003/02/28 20:11:29 greg Exp $";
#endif
/*
 * Header file for tracking hierarchical object names
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "parser.h"


int     obj_nnames;                     /* depth of name hierarchy */
char    **obj_name;                     /* name list */

static int      obj_maxname;            /* allocated list size */

#define ALLOC_INC       16              /* list increment ( > 1 ) */


int
obj_handler(ac, av)             /* handle an object entity statement */
int     ac;
char    **av;
{
        if (ac == 1) {                          /* just pop top object */
                if (obj_nnames < 1)
                        return(MG_ECNTXT);
                free(obj_name[--obj_nnames]);
                obj_name[obj_nnames] = NULL;
                return(MG_OK);
        }
        if (ac != 2)
                return(MG_EARGC);
        if (!isname(av[1]))
                return(MG_EILL);
        if (obj_nnames >= obj_maxname-1) {      /* enlarge array */
                if (!obj_maxname)
                        obj_name = (char **)malloc(
                                (obj_maxname=ALLOC_INC)*sizeof(char *));
                else
                        obj_name = (char **)realloc(obj_name,
                                (obj_maxname+=ALLOC_INC)*sizeof(char *));
                if (obj_name == NULL)
                        return(MG_EMEM);
        }
                                                /* allocate new entry */
        obj_name[obj_nnames] = (char *)malloc(strlen(av[1])+1);
        if (obj_name[obj_nnames] == NULL)
                return(MG_EMEM);
        strcpy(obj_name[obj_nnames++], av[1]);
        obj_name[obj_nnames] = NULL;
        return(MG_OK);
}


void
obj_clear()                     /* clear object stack */
{
        while (obj_nnames)
                free(obj_name[--obj_nnames]);
        if (obj_maxname) {
                free(obj_name);
                obj_maxname = 0;
        }
}
Revision:	1.7
Committed:	Fri Jan 14 05:46:12 2011 UTC (13 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.6:	+5 -5 lines
Log Message:	Eliminated unnecessary MEM_PTR
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	1.7	static const char RCSid[] = "$Id: object.c,v 1.6 2003/02/28 20:11:29 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* Header file for tracking hierarchical object names
6			*/
7
8			#include <stdio.h>
9	greg	1.6	#include <stdlib.h>
10	greg	1.1	#include <string.h>
11			#include "parser.h"
12
13
14			int obj_nnames; /* depth of name hierarchy */
15			char *obj_name; / name list */
16
17			static int obj_maxname; /* allocated list size */
18
19	greg	1.3	#define ALLOC_INC 16 /* list increment ( > 1 ) */
20	greg	1.1
21
22			int
23			obj_handler(ac, av) /* handle an object entity statement */
24			int ac;
25			char **av;
26			{
27			if (ac == 1) { /* just pop top object */
28			if (obj_nnames < 1)
29	greg	1.5	return(MG_ECNTXT);
30	greg	1.7	free(obj_name[--obj_nnames]);
31	greg	1.1	obj_name[obj_nnames] = NULL;
32			return(MG_OK);
33			}
34			if (ac != 2)
35			return(MG_EARGC);
36	greg	1.4	if (!isname(av[1]))
37			return(MG_EILL);
38	greg	1.3	if (obj_nnames >= obj_maxname-1) { /* enlarge array */
39	greg	1.1	if (!obj_maxname)
40			obj_name = (char **)malloc(
41			(obj_maxname=ALLOC_INC)sizeof(char ));
42			else
43	greg	1.7	obj_name = (char **)realloc(obj_name,
44	greg	1.1	(obj_maxname+=ALLOC_INC)sizeof(char ));
45			if (obj_name == NULL)
46			return(MG_EMEM);
47			}
48			/* allocate new entry */
49			obj_name[obj_nnames] = (char *)malloc(strlen(av[1])+1);
50			if (obj_name[obj_nnames] == NULL)
51			return(MG_EMEM);
52			strcpy(obj_name[obj_nnames++], av[1]);
53			obj_name[obj_nnames] = NULL;
54			return(MG_OK);
55			}
56	greg	1.2
57
58			void
59			obj_clear() /* clear object stack */
60			{
61			while (obj_nnames)
62	greg	1.7	free(obj_name[--obj_nnames]);
63	greg	1.2	if (obj_maxname) {
64	greg	1.7	free(obj_name);
65	greg	1.2	obj_maxname = 0;
66			}
67			}