110 lines
3.4 KiB
C
110 lines
3.4 KiB
C
/* $NetBSD: catgets.c,v 1.12 1997/07/30 23:49:48 jtc Exp $ */
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/*-
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* Copyright (c) 1996 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by J.T. Conklin.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#define _NLS_PRIVATE
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#include "namespace.h"
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <nl_types.h>
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char *
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_catgets(catd, set_id, msg_id, s)
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nl_catd catd;
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int set_id;
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int msg_id;
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const char *s;
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{
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struct _nls_cat_hdr *cat_hdr;
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struct _nls_set_hdr *set_hdr;
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struct _nls_msg_hdr *msg_hdr;
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int l, u, i, r;
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if (catd == (nl_catd) -1) {
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errno = EBADF;
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return (char *) s;
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}
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cat_hdr = (struct _nls_cat_hdr *) catd->__data;
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set_hdr = (struct _nls_set_hdr *) ((char *) catd->__data
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+ sizeof(struct _nls_cat_hdr));
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/* binary search, see knuth algorithm b */
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l = 0;
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u = ntohl(cat_hdr->__nsets) - 1;
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while (l <= u) {
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i = (l + u) / 2;
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r = set_id - ntohl(set_hdr[i].__setno);
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if (r == 0) {
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msg_hdr = (struct _nls_msg_hdr *) ((char *)catd->__data
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+ sizeof(struct _nls_cat_hdr)
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+ ntohl(cat_hdr->__msg_hdr_offset));
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l = ntohl(set_hdr[i].__index);
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u = l + ntohl(set_hdr[i].__nmsgs) - 1;
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while (l <= u) {
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i = (l + u) / 2;
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r = msg_id - ntohl(msg_hdr[i].__msgno);
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if (r == 0) {
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return ((char *) catd->__data
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+ sizeof(struct _nls_cat_hdr)
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+ ntohl(cat_hdr->__msg_txt_offset)
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+ ntohl(msg_hdr[i].__offset));
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} else if (r < 0) {
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u = i - 1;
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} else {
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l = i + 1;
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}
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}
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/* not found */
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return (char *) s;
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} else if (r < 0) {
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u = i - 1;
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} else {
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l = i + 1;
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}
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}
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/* not found */
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return (char *) s;
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}
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