1/*-
2 * Copyright (c) 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Paul Borman at Krystal Technologies.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#if defined(LIBC_SCCS) && !defined(lint)
34static char sccsid[] = "@(#)rune.c	8.1 (Berkeley) 6/4/93";
35#endif /* LIBC_SCCS and not lint */
36#include <sys/cdefs.h>
37__FBSDID("$FreeBSD$");
38
39#include "namespace.h"
40#include <arpa/inet.h>
41#include <errno.h>
42#include <runetype.h>
43#include <stdio.h>
44#include <string.h>
45#include <stdlib.h>
46#include <sys/types.h>
47#include <sys/stat.h>
48#include "un-namespace.h"
49
50#include "runefile.h"
51
52_RuneLocale *_Read_RuneMagi(FILE *);
53
54_RuneLocale *
55_Read_RuneMagi(FILE *fp)
56{
57	char *fdata, *data;
58	void *lastp;
59	_FileRuneLocale *frl;
60	_RuneLocale *rl;
61	_FileRuneEntry *frr;
62	_RuneEntry *rr;
63	struct stat sb;
64	int x, saverr;
65	void *variable;
66	_FileRuneEntry *runetype_ext_ranges;
67	_FileRuneEntry *maplower_ext_ranges;
68	_FileRuneEntry *mapupper_ext_ranges;
69	int runetype_ext_len = 0;
70
71	if (_fstat(fileno(fp), &sb) < 0)
72		return (NULL);
73
74	if ((size_t)sb.st_size < sizeof(_FileRuneLocale)) {
75		errno = EFTYPE;
76		return (NULL);
77	}
78
79	if ((fdata = malloc(sb.st_size)) == NULL)
80		return (NULL);
81
82	errno = 0;
83	rewind(fp); /* Someone might have read the magic number once already */
84	if (errno) {
85		saverr = errno;
86		free(fdata);
87		errno = saverr;
88		return (NULL);
89	}
90
91	if (fread(fdata, sb.st_size, 1, fp) != 1) {
92		saverr = errno;
93		free(fdata);
94		errno = saverr;
95		return (NULL);
96	}
97
98	frl = (_FileRuneLocale *)fdata;
99	lastp = fdata + sb.st_size;
100
101	variable = frl + 1;
102
103	if (memcmp(frl->magic, _FILE_RUNE_MAGIC_1, sizeof(frl->magic))) {
104		free(fdata);
105		errno = EFTYPE;
106		return (NULL);
107	}
108
109	frl->variable_len = ntohl(frl->variable_len);
110	frl->runetype_ext_nranges = ntohl(frl->runetype_ext_nranges);
111	frl->maplower_ext_nranges = ntohl(frl->maplower_ext_nranges);
112	frl->mapupper_ext_nranges = ntohl(frl->mapupper_ext_nranges);
113
114	for (x = 0; x < _CACHED_RUNES; ++x) {
115		frl->runetype[x] = ntohl(frl->runetype[x]);
116		frl->maplower[x] = ntohl(frl->maplower[x]);
117		frl->mapupper[x] = ntohl(frl->mapupper[x]);
118	}
119
120	runetype_ext_ranges = (_FileRuneEntry *)variable;
121	variable = runetype_ext_ranges + frl->runetype_ext_nranges;
122	if (variable > lastp) {
123		free(fdata);
124		errno = EFTYPE;
125		return (NULL);
126	}
127
128	maplower_ext_ranges = (_FileRuneEntry *)variable;
129	variable = maplower_ext_ranges + frl->maplower_ext_nranges;
130	if (variable > lastp) {
131		free(fdata);
132		errno = EFTYPE;
133		return (NULL);
134	}
135
136	mapupper_ext_ranges = (_FileRuneEntry *)variable;
137	variable = mapupper_ext_ranges + frl->mapupper_ext_nranges;
138	if (variable > lastp) {
139		free(fdata);
140		errno = EFTYPE;
141		return (NULL);
142	}
143
144	frr = runetype_ext_ranges;
145	for (x = 0; x < frl->runetype_ext_nranges; ++x) {
146		uint32_t *types;
147
148		frr[x].min = ntohl(frr[x].min);
149		frr[x].max = ntohl(frr[x].max);
150		frr[x].map = ntohl(frr[x].map);
151		if (frr[x].map == 0) {
152			int len = frr[x].max - frr[x].min + 1;
153			types = variable;
154			variable = types + len;
155			runetype_ext_len += len;
156			if (variable > lastp) {
157				free(fdata);
158				errno = EFTYPE;
159				return (NULL);
160			}
161			while (len-- > 0)
162				types[len] = ntohl(types[len]);
163		}
164	}
165
166	frr = maplower_ext_ranges;
167	for (x = 0; x < frl->maplower_ext_nranges; ++x) {
168		frr[x].min = ntohl(frr[x].min);
169		frr[x].max = ntohl(frr[x].max);
170		frr[x].map = ntohl(frr[x].map);
171	}
172
173	frr = mapupper_ext_ranges;
174	for (x = 0; x < frl->mapupper_ext_nranges; ++x) {
175		frr[x].min = ntohl(frr[x].min);
176		frr[x].max = ntohl(frr[x].max);
177		frr[x].map = ntohl(frr[x].map);
178	}
179	if ((char *)variable + frl->variable_len > (char *)lastp) {
180		free(fdata);
181		errno = EFTYPE;
182		return (NULL);
183	}
184
185	/*
186	 * Convert from disk format to host format.
187	 */
188	data = malloc(sizeof(_RuneLocale) +
189	    (frl->runetype_ext_nranges + frl->maplower_ext_nranges +
190	    frl->mapupper_ext_nranges) * sizeof(_RuneEntry) +
191	    runetype_ext_len * sizeof(*rr->__types) +
192	    frl->variable_len);
193	if (data == NULL) {
194		saverr = errno;
195		free(fdata);
196		errno = saverr;
197		return (NULL);
198	}
199
200	rl = (_RuneLocale *)data;
201	rl->__variable = rl + 1;
202
203	memcpy(rl->__magic, _RUNE_MAGIC_1, sizeof(rl->__magic));
204	memcpy(rl->__encoding, frl->encoding, sizeof(rl->__encoding));
205	rl->__invalid_rune = 0;
206
207	rl->__variable_len = frl->variable_len;
208	rl->__runetype_ext.__nranges = frl->runetype_ext_nranges;
209	rl->__maplower_ext.__nranges = frl->maplower_ext_nranges;
210	rl->__mapupper_ext.__nranges = frl->mapupper_ext_nranges;
211
212	for (x = 0; x < _CACHED_RUNES; ++x) {
213		rl->__runetype[x] = frl->runetype[x];
214		rl->__maplower[x] = frl->maplower[x];
215		rl->__mapupper[x] = frl->mapupper[x];
216	}
217
218	rl->__runetype_ext.__ranges = (_RuneEntry *)rl->__variable;
219	rl->__variable = rl->__runetype_ext.__ranges +
220	    rl->__runetype_ext.__nranges;
221
222	rl->__maplower_ext.__ranges = (_RuneEntry *)rl->__variable;
223	rl->__variable = rl->__maplower_ext.__ranges +
224	    rl->__maplower_ext.__nranges;
225
226	rl->__mapupper_ext.__ranges = (_RuneEntry *)rl->__variable;
227	rl->__variable = rl->__mapupper_ext.__ranges +
228	    rl->__mapupper_ext.__nranges;
229
230	variable = mapupper_ext_ranges + frl->mapupper_ext_nranges;
231	frr = runetype_ext_ranges;
232	rr = rl->__runetype_ext.__ranges;
233	for (x = 0; x < rl->__runetype_ext.__nranges; ++x) {
234		uint32_t *types;
235
236		rr[x].__min = frr[x].min;
237		rr[x].__max = frr[x].max;
238		rr[x].__map = frr[x].map;
239		if (rr[x].__map == 0) {
240			int len = rr[x].__max - rr[x].__min + 1;
241			types = variable;
242			variable = types + len;
243			rr[x].__types = rl->__variable;
244			rl->__variable = rr[x].__types + len;
245			while (len-- > 0)
246				rr[x].__types[len] = types[len];
247		} else
248			rr[x].__types = NULL;
249	}
250
251	frr = maplower_ext_ranges;
252	rr = rl->__maplower_ext.__ranges;
253	for (x = 0; x < rl->__maplower_ext.__nranges; ++x) {
254		rr[x].__min = frr[x].min;
255		rr[x].__max = frr[x].max;
256		rr[x].__map = frr[x].map;
257	}
258
259	frr = mapupper_ext_ranges;
260	rr = rl->__mapupper_ext.__ranges;
261	for (x = 0; x < rl->__mapupper_ext.__nranges; ++x) {
262		rr[x].__min = frr[x].min;
263		rr[x].__max = frr[x].max;
264		rr[x].__map = frr[x].map;
265	}
266
267	memcpy(rl->__variable, variable, rl->__variable_len);
268	free(fdata);
269
270	/*
271	 * Go out and zero pointers that should be zero.
272	 */
273	if (!rl->__variable_len)
274		rl->__variable = NULL;
275
276	if (!rl->__runetype_ext.__nranges)
277		rl->__runetype_ext.__ranges = NULL;
278
279	if (!rl->__maplower_ext.__nranges)
280		rl->__maplower_ext.__ranges = NULL;
281
282	if (!rl->__mapupper_ext.__nranges)
283		rl->__mapupper_ext.__ranges = NULL;
284
285	return (rl);
286}
287