1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1980, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <err.h>
33#include <errno.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37
38#define	ungetchar(c)	ungetc(c, stdin)
39
40/*
41 * mkstr - create a string error message file by massaging C source
42 *
43 * Bill Joy UCB August 1977
44 *
45 * Modified March 1978 to hash old messages to be able to recompile
46 * without addding messages to the message file (usually)
47 *
48 * Based on an earlier program conceived by Bill Joy and Chuck Haley
49 *
50 * Program to create a string error message file
51 * from a group of C programs.  Arguments are the name
52 * of the file where the strings are to be placed, the
53 * prefix of the new files where the processed source text
54 * is to be placed, and the files to be processed.
55 *
56 * The program looks for 'error("' in the source stream.
57 * Whenever it finds this, the following characters from the '"'
58 * to a '"' are replaced by 'seekpt' where seekpt is a
59 * pointer into the error message file.
60 * If the '(' is not immediately followed by a '"' no change occurs.
61 *
62 * The optional '-' causes strings to be added at the end of the
63 * existing error message file for recompilation of single routines.
64 */
65
66static FILE	*mesgread, *mesgwrite;
67static char	name[100], *np;
68
69void copystr(void);
70int fgetNUL(char *, int, FILE *);
71unsigned hashit(char *, int, unsigned);
72void inithash(void);
73int match(const char *);
74int octdigit(char);
75void process(void);
76void usage(void);
77
78int
79main(int argc, char *argv[])
80{
81	char addon = 0;
82	size_t namelen;
83
84	argc--, argv++;
85	if (argc > 1 && argv[0][0] == '-')
86		addon++, argc--, argv++;
87	if (argc < 3)
88		usage();
89	mesgwrite = fopen(argv[0], addon ? "a" : "w");
90	if (mesgwrite == NULL)
91		err(1, "%s", argv[0]);
92	mesgread = fopen(argv[0], "r");
93	if (mesgread == NULL)
94		err(1, "%s", argv[0]);
95	inithash();
96	argc--, argv++;
97	namelen = strlcpy(name, argv[0], sizeof(name));
98	if (namelen >= sizeof(name)) {
99		errno = ENAMETOOLONG;
100		err(1, "%s", argv[0]);
101	}
102	np = name + namelen;
103	argc--, argv++;
104	do {
105		if (strlcpy(np, argv[0], sizeof(name) - namelen) >=
106		    sizeof(name) - namelen) {
107			errno = ENAMETOOLONG;
108			err(1, "%s%s", name, argv[0]);
109		}
110		if (freopen(name, "w", stdout) == NULL)
111			err(1, "%s", name);
112		if (freopen(argv[0], "r", stdin) == NULL)
113			err(1, "%s", argv[0]);
114		process();
115		argc--, argv++;
116	} while (argc > 0);
117	exit(0);
118}
119
120void
121usage(void)
122{
123	fprintf(stderr, "usage: mkstr [-] mesgfile prefix file ...\n");
124	exit(1);
125}
126
127void
128process(void)
129{
130	int c;
131
132	for (;;) {
133		c = getchar();
134		if (c == EOF)
135			return;
136		if (c != 'e') {
137			putchar(c);
138			continue;
139		}
140		if (match("error(")) {
141			printf("error(");
142			c = getchar();
143			if (c != '"')
144				putchar(c);
145			else
146				copystr();
147		}
148	}
149}
150
151int
152match(const char *ocp)
153{
154	const char *cp;
155	int c;
156
157	for (cp = ocp + 1; *cp; cp++) {
158		c = getchar();
159		if (c != *cp) {
160			while (ocp < cp)
161				putchar(*ocp++);
162			ungetchar(c);
163			return (0);
164		}
165	}
166	return (1);
167}
168
169void
170copystr(void)
171{
172	int c, ch;
173	char buf[512];
174	char *cp = buf;
175
176	for (;;) {
177		if (cp == buf + sizeof(buf) - 2)
178			errx(1, "message too long");
179		c = getchar();
180		if (c == EOF)
181			break;
182		switch (c) {
183
184		case '"':
185			*cp++ = 0;
186			goto out;
187		case '\\':
188			c = getchar();
189			switch (c) {
190
191			case 'b':
192				c = '\b';
193				break;
194			case 't':
195				c = '\t';
196				break;
197			case 'r':
198				c = '\r';
199				break;
200			case 'n':
201				c = '\n';
202				break;
203			case '\n':
204				continue;
205			case 'f':
206				c = '\f';
207				break;
208			case '0':
209				c = 0;
210				break;
211			case '\\':
212				break;
213			default:
214				if (!octdigit(c))
215					break;
216				c -= '0';
217				ch = getchar();
218				if (!octdigit(ch))
219					break;
220				c <<= 7, c += ch - '0';
221				ch = getchar();
222				if (!octdigit(ch))
223					break;
224				c <<= 3, c+= ch - '0', ch = -1;
225				break;
226			}
227		}
228		*cp++ = c;
229	}
230out:
231	*cp = 0;
232	printf("%d", hashit(buf, 1, 0));
233}
234
235int
236octdigit(char c)
237{
238
239	return (c >= '0' && c <= '7');
240}
241
242void
243inithash(void)
244{
245	char buf[512];
246	int mesgpt = 0;
247
248	rewind(mesgread);
249	while (fgetNUL(buf, sizeof buf, mesgread) != 0) {
250		hashit(buf, 0, mesgpt);
251		mesgpt += strlen(buf) + 2;
252	}
253}
254
255#define	NBUCKETS	511
256
257static struct	hash {
258	long	hval;
259	unsigned hpt;
260	struct	hash *hnext;
261} *bucket[NBUCKETS];
262
263unsigned
264hashit(char *str, int really, unsigned fakept)
265{
266	int i;
267	struct hash *hp;
268	char buf[512];
269	long hashval = 0;
270	char *cp;
271
272	if (really)
273		fflush(mesgwrite);
274	for (cp = str; *cp;)
275		hashval = (hashval << 1) + *cp++;
276	i = hashval % NBUCKETS;
277	if (i < 0)
278		i += NBUCKETS;
279	if (really != 0)
280		for (hp = bucket[i]; hp != 0; hp = hp->hnext)
281		if (hp->hval == hashval) {
282			fseek(mesgread, (long) hp->hpt, 0);
283			fgetNUL(buf, sizeof buf, mesgread);
284/*
285			fprintf(stderr, "Got (from %d) %s\n", hp->hpt, buf);
286*/
287			if (strcmp(buf, str) == 0)
288				break;
289		}
290	if (!really || hp == 0) {
291		hp = (struct hash *) calloc(1, sizeof *hp);
292		if (hp == NULL)
293			err(1, NULL);
294		hp->hnext = bucket[i];
295		hp->hval = hashval;
296		hp->hpt = really ? ftell(mesgwrite) : fakept;
297		if (really) {
298			fwrite(str, sizeof (char), strlen(str) + 1, mesgwrite);
299			fwrite("\n", sizeof (char), 1, mesgwrite);
300		}
301		bucket[i] = hp;
302	}
303/*
304	fprintf(stderr, "%s hashed to %ld at %d\n", str, hp->hval, hp->hpt);
305*/
306	return (hp->hpt);
307}
308
309int
310fgetNUL(char *obuf, int rmdr, FILE *file)
311{
312	int c;
313	char *buf = obuf;
314
315	while (--rmdr > 0 && (c = getc(file)) != 0 && c != EOF)
316		*buf++ = c;
317	*buf++ = 0;
318	getc(file);
319	return ((feof(file) || ferror(file)) ? 0 : 1);
320}
321