[p5sagit/p5-mst-13.2.git] / ext / SDBM_File / sdbm / util.c

#include <stdio.h>
#ifdef SDBM
#include "sdbm.h"
#else
#include "ndbm.h"
#endif

void
oops(s1, s2)
register char *s1;
register char *s2;
{
	extern int errno, sys_nerr;
	extern char *sys_errlist[];
	extern char *progname;

	if (progname)
		fprintf(stderr, "%s: ", progname);
	fprintf(stderr, s1, s2);
	if (errno > 0 && errno < sys_nerr)
		fprintf(stderr, " (%s)", sys_errlist[errno]);
	fprintf(stderr, "\n");
	exit(1);
}

int
okpage(pag)
char *pag;
{
	register unsigned n;
	register off;
	register short *ino = (short *) pag;

	if ((n = ino[0]) > PBLKSIZ / sizeof(short))
		return 0;

	if (!n)
		return 1;

	off = PBLKSIZ;
	for (ino++; n; ino += 2) {
		if (ino[0] > off || ino[1] > off ||
		    ino[1] > ino[0])
			return 0;
		off = ino[1];
		n -= 2;
	}

	return 1;
}
Commit	Line	Data
463ee0b2	1	#include <stdio.h>
	2	#ifdef SDBM
	3	#include "sdbm.h"
	4	#else
	5	#include "ndbm.h"
	6	#endif
	7
	8	void
	9	oops(s1, s2)
	10	register char *s1;
	11	register char *s2;
	12	{
	13	extern int errno, sys_nerr;
	14	extern char *sys_errlist[];
	15	extern char *progname;
	16
	17	if (progname)
	18	fprintf(stderr, "%s: ", progname);
	19	fprintf(stderr, s1, s2);
	20	if (errno > 0 && errno < sys_nerr)
	21	fprintf(stderr, " (%s)", sys_errlist[errno]);
	22	fprintf(stderr, "\n");
	23	exit(1);
	24	}
	25
	26	int
	27	okpage(pag)
	28	char *pag;
	29	{
	30	register unsigned n;
	31	register off;
	32	register short ino = (short ) pag;
	33
	34	if ((n = ino[0]) > PBLKSIZ / sizeof(short))
	35	return 0;
	36
	37	if (!n)
	38	return 1;
	39
	40	off = PBLKSIZ;
	41	for (ino++; n; ino += 2) {
	42	if (ino[0] > off \|\| ino[1] > off \|\|
	43	ino[1] > ino[0])
	44	return 0;
	45	off = ino[1];
	46	n -= 2;
	47	}
	48
	49	return 1;
	50	}