84 lines
1.7 KiB
C
Executable File
84 lines
1.7 KiB
C
Executable File
/*
|
|
* catgets.c
|
|
*
|
|
* Copyright (c) 1990, 1991, Sun Microsystems, Inc.
|
|
*/
|
|
|
|
#ident "@(#)catgets.c 1.9 94/02/24 SMI"
|
|
|
|
#ifdef __STDC__
|
|
#pragma weak catgets = _catgets
|
|
#endif
|
|
|
|
#include "synonyms.h"
|
|
#include <stdlib.h>
|
|
#include <nl_types.h>
|
|
#include <unistd.h>
|
|
|
|
char *
|
|
_catgets (catd_st, set_id, msg_id, def_str)
|
|
nl_catd catd_st;
|
|
int set_id;
|
|
int msg_id;
|
|
const char *def_str;
|
|
{
|
|
int hi, lo, mid;
|
|
struct _cat_hdr *p;
|
|
struct _cat_set_hdr *q;
|
|
struct _cat_msg_hdr *r;
|
|
void *catd;
|
|
|
|
if (catd_st == NULL ||
|
|
catd_st == (nl_catd)-1 ||
|
|
catd_st->__content == NULL ||
|
|
catd_st->__size == 0)
|
|
return ((char *)def_str);
|
|
|
|
catd = catd_st->__content;
|
|
p = (struct _cat_hdr *) catd_st->__content;
|
|
hi = p->__nsets - 1;
|
|
lo = 0;
|
|
/*
|
|
* Two while loops will perform binary search.
|
|
* Outer loop searches the set and inner loop searches
|
|
* message id
|
|
*/
|
|
while (hi >= lo) {
|
|
mid = (hi + lo) / 2;
|
|
q = (struct _cat_set_hdr *)
|
|
((char *) catd
|
|
+ _CAT_HDR_SIZE
|
|
+ _CAT_SET_HDR_SIZE * mid);
|
|
if (q->__set_no == set_id) {
|
|
lo = q->__first_msg_hdr;
|
|
hi = lo + q->__nmsgs - 1;
|
|
while (hi >= lo) {
|
|
mid = (hi + lo) / 2;
|
|
r = (struct _cat_msg_hdr *) (
|
|
(char *) catd
|
|
+ _CAT_HDR_SIZE
|
|
+ p->__msg_hdr_offset
|
|
+ _CAT_MSG_HDR_SIZE * mid);
|
|
if (r->__msg_no == msg_id) {
|
|
return ((char *) catd
|
|
+ _CAT_HDR_SIZE
|
|
+ p->__msg_text_offset
|
|
+ r->__msg_offset);
|
|
} else if (r->__msg_no < msg_id)
|
|
lo = mid + 1;
|
|
else
|
|
hi = mid - 1;
|
|
} /* while */
|
|
|
|
/* In case set number not found */
|
|
return ((char *)def_str);
|
|
} else if (q->__set_no < set_id)
|
|
lo = mid + 1;
|
|
else
|
|
hi = mid - 1;
|
|
} /* while */
|
|
|
|
/* In case msg_id not found. */
|
|
return ((char *)def_str);
|
|
}
|