src/meta/psort.c

#ifndef lint
static const char       RCSid[] = "$Id: psort.c,v 1.2 2003/08/01 14:14:24 schorsch Exp $";
#endif
/*
 *   Program to sort a meta-file
 *
 *   cc psort.c sort.o palloc.o mfio.o syscalls.o misc.o
 */


#define  MAXALLOC  1100         /* must be >= PBSIZE in sort.c */


#include  "meta.h"


char  *progname;

int  maxalloc = MAXALLOC;

static int  val[5], extrema[5];


static int pcompare(PRIMITIVE  **pp1, PRIMITIVE  **pp2);


int
main(
        int  argc,
        char  **argv
)
{
 FILE  *fp;
 int  i;

 progname = *argv++;
 argc--;

 for (i = 0; i < 4 && argc && (**argv == '+' || **argv == '-'); i++)  {
    val[i] = (**argv == '+') ? 1 : -1;
    switch (*(*argv+1))  {
       case 'x':
          extrema[i] = XMN;
          break;
       case 'y':
          extrema[i] = YMN;
          break;
       case 'X':
          extrema[i] = XMX;
          break;
       case 'Y':
          extrema[i] = YMX;
          break;
       default:
          sprintf(errmsg, "unknown option \"%s\"", *argv);
          error(USER, errmsg);
          break;
       }
    argv++;
    argc--;
    }

 val[i] = 0;

 if (argc)
    while (argc)  {
       fp = efopen(*argv, "r");
       sort(fp, pcompare);
       fclose(fp);
       argv++;
       argc--;
       }
 else
    sort(stdin, pcompare);

 writeof(stdout);

 return(0);
 }


int
pcompare(
        PRIMITIVE  **pp1,
        PRIMITIVE  **pp2
)
{
 register PRIMITIVE  *p1 = *pp1, *p2 = *pp2;
 register int  i;

 for (i = 0; val[i]; i++)
    if (p1->xy[extrema[i]] > p2->xy[extrema[i]])
       return(val[i]);
    else if (p1->xy[extrema[i]] < p2->xy[extrema[i]])
       return(-val[i]);

 return(0);
 }
Revision:	1.3
Committed:	Sat Nov 15 02:13:37 2003 UTC (21 years, 11 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R4, rad5R2, rad5R3, rad5R0, rad5R1, rad4R2, rad3R7P2, rad3R7P1, rad6R0, rad4R1, rad4R0, rad3R6, rad3R6P1, rad3R8, rad3R9, rad4R2P1, rad4R2P2, HEAD
Changes since 1.2:	+13 -14 lines
Log Message:	Continued ANSIfication, and reduced other compile warnings.
#	Content
1	#ifndef lint
2	static const char RCSid[] = "$Id: psort.c,v 1.2 2003/08/01 14:14:24 schorsch Exp $";
3	#endif
4	/*
5	* Program to sort a meta-file
6	*
7	* cc psort.c sort.o palloc.o mfio.o syscalls.o misc.o
8	*/
9
10
11	#define MAXALLOC 1100 /* must be >= PBSIZE in sort.c */
12
13
14	#include "meta.h"
15
16
17	char *progname;
18
19	int maxalloc = MAXALLOC;
20
21	static int val[5], extrema[5];
22
23
24	static int pcompare(PRIMITIVE pp1, PRIMITIVE pp2);
25
26
27	int
28	main(
29	int argc,
30	char **argv
31	)
32	{
33	FILE *fp;
34	int i;
35
36	progname = *argv++;
37	argc--;
38
39	for (i = 0; i < 4 && argc && (argv == '+' \|\| argv == '-'); i++) {
40	val[i] = (**argv == '+') ? 1 : -1;
41	switch ((argv+1)) {
42	case 'x':
43	extrema[i] = XMN;
44	break;
45	case 'y':
46	extrema[i] = YMN;
47	break;
48	case 'X':
49	extrema[i] = XMX;
50	break;
51	case 'Y':
52	extrema[i] = YMX;
53	break;
54	default:
55	sprintf(errmsg, "unknown option \"%s\"", *argv);
56	error(USER, errmsg);
57	break;
58	}
59	argv++;
60	argc--;
61	}
62
63	val[i] = 0;
64
65	if (argc)
66	while (argc) {
67	fp = efopen(*argv, "r");
68	sort(fp, pcompare);
69	fclose(fp);
70	argv++;
71	argc--;
72	}
73	else
74	sort(stdin, pcompare);
75
76	writeof(stdout);
77
78	return(0);
79	}
80
81
82
83
84	int
85	pcompare(
86	PRIMITIVE **pp1,
87	PRIMITIVE **pp2
88	)
89	{
90	register PRIMITIVE p1 = pp1, p2 = pp2;
91	register int i;
92
93	for (i = 0; val[i]; i++)
94	if (p1->xy[extrema[i]] > p2->xy[extrema[i]])
95	return(val[i]);
96	else if (p1->xy[extrema[i]] < p2->xy[extrema[i]])
97	return(-val[i]);
98
99	return(0);
100	}