1/*-
2 * Copyright (c) 1991, 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 * Kenneth Almquist.
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 0
34#ifndef lint
35static char const copyright[] =
36"@(#) Copyright (c) 1991, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41static char sccsid[] = "@(#)mksyntax.c	8.2 (Berkeley) 5/4/95";
42#endif /* not lint */
43#endif
44#include <sys/cdefs.h>
45__FBSDID("$FreeBSD$");
46
47/*
48 * This program creates syntax.h and syntax.c.
49 */
50
51#include <stdio.h>
52#include <stdlib.h>
53#include <string.h>
54#include "parser.h"
55
56
57struct synclass {
58	const char *name;
59	const char *comment;
60};
61
62/* Syntax classes */
63struct synclass synclass[] = {
64	{ "CWORD",	"character is nothing special" },
65	{ "CNL",	"newline character" },
66	{ "CBACK",	"a backslash character" },
67	{ "CSBACK",	"a backslash character in single quotes" },
68	{ "CSQUOTE",	"single quote" },
69	{ "CDQUOTE",	"double quote" },
70	{ "CENDQUOTE",	"a terminating quote" },
71	{ "CBQUOTE",	"backwards single quote" },
72	{ "CVAR",	"a dollar sign" },
73	{ "CENDVAR",	"a '}' character" },
74	{ "CLP",	"a left paren in arithmetic" },
75	{ "CRP",	"a right paren in arithmetic" },
76	{ "CEOF",	"end of file" },
77	{ "CCTL",	"like CWORD, except it must be escaped" },
78	{ "CSPCL",	"these terminate a word" },
79	{ "CIGN",       "character should be ignored" },
80	{ NULL,		NULL }
81};
82
83
84/*
85 * Syntax classes for is_ functions.  Warning:  if you add new classes
86 * you may have to change the definition of the is_in_name macro.
87 */
88struct synclass is_entry[] = {
89	{ "ISDIGIT",	"a digit" },
90	{ "ISUPPER",	"an upper case letter" },
91	{ "ISLOWER",	"a lower case letter" },
92	{ "ISUNDER",	"an underscore" },
93	{ "ISSPECL",	"the name of a special parameter" },
94	{ NULL, 	NULL }
95};
96
97static char writer[] = "\
98/*\n\
99 * This file was generated by the mksyntax program.\n\
100 */\n\
101\n";
102
103
104static FILE *cfile;
105static FILE *hfile;
106
107static void add_default(void);
108static void finish(void);
109static void init(const char *);
110static void add(const char *, const char *);
111static void output_type_macros(void);
112
113int
114main(int argc __unused, char **argv __unused)
115{
116	int i;
117	char buf[80];
118	int pos;
119
120	/* Create output files */
121	if ((cfile = fopen("syntax.c", "w")) == NULL) {
122		perror("syntax.c");
123		exit(2);
124	}
125	if ((hfile = fopen("syntax.h", "w")) == NULL) {
126		perror("syntax.h");
127		exit(2);
128	}
129	fputs(writer, hfile);
130	fputs(writer, cfile);
131
132	fputs("#include <sys/cdefs.h>\n", hfile);
133	fputs("#include <limits.h>\n\n", hfile);
134
135	/* Generate the #define statements in the header file */
136	fputs("/* Syntax classes */\n", hfile);
137	for (i = 0 ; synclass[i].name ; i++) {
138		sprintf(buf, "#define %s %d", synclass[i].name, i);
139		fputs(buf, hfile);
140		for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
141			putc('\t', hfile);
142		fprintf(hfile, "/* %s */\n", synclass[i].comment);
143	}
144	putc('\n', hfile);
145	fputs("/* Syntax classes for is_ functions */\n", hfile);
146	for (i = 0 ; is_entry[i].name ; i++) {
147		sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i);
148		fputs(buf, hfile);
149		for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
150			putc('\t', hfile);
151		fprintf(hfile, "/* %s */\n", is_entry[i].comment);
152	}
153	putc('\n', hfile);
154	fputs("#define SYNBASE (1 - CHAR_MIN)\n", hfile);
155	fputs("#define PEOF -SYNBASE\n\n", hfile);
156	putc('\n', hfile);
157	fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile);
158	fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile);
159	fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile);
160	fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile);
161	putc('\n', hfile);
162	output_type_macros();		/* is_digit, etc. */
163	putc('\n', hfile);
164
165	/* Generate the syntax tables. */
166	fputs("#include \"parser.h\"\n", cfile);
167	fputs("#include \"shell.h\"\n", cfile);
168	fputs("#include \"syntax.h\"\n\n", cfile);
169
170	fputs("/* syntax table used when not in quotes */\n", cfile);
171	init("basesyntax");
172	add_default();
173	add("\n", "CNL");
174	add("\\", "CBACK");
175	add("'", "CSQUOTE");
176	add("\"", "CDQUOTE");
177	add("`", "CBQUOTE");
178	add("$", "CVAR");
179	add("}", "CENDVAR");
180	add("<>();&| \t", "CSPCL");
181	finish();
182
183	fputs("\n/* syntax table used when in double quotes */\n", cfile);
184	init("dqsyntax");
185	add_default();
186	add("\n", "CNL");
187	add("\\", "CBACK");
188	add("\"", "CENDQUOTE");
189	add("`", "CBQUOTE");
190	add("$", "CVAR");
191	add("}", "CENDVAR");
192	/* ':/' for tilde expansion, '-^]' for [a\-x] pattern ranges */
193	add("!*?[]=~:/-^", "CCTL");
194	finish();
195
196	fputs("\n/* syntax table used when in single quotes */\n", cfile);
197	init("sqsyntax");
198	add_default();
199	add("\n", "CNL");
200	add("\\", "CSBACK");
201	add("'", "CENDQUOTE");
202	/* ':/' for tilde expansion, '-^]' for [a\-x] pattern ranges */
203	add("!*?[]=~:/-^", "CCTL");
204	finish();
205
206	fputs("\n/* syntax table used when in arithmetic */\n", cfile);
207	init("arisyntax");
208	add_default();
209	add("\n", "CNL");
210	add("\\", "CBACK");
211	add("`", "CBQUOTE");
212	add("\"", "CIGN");
213	add("$", "CVAR");
214	add("}", "CENDVAR");
215	add("(", "CLP");
216	add(")", "CRP");
217	finish();
218
219	fputs("\n/* character classification table */\n", cfile);
220	init("is_type");
221	add("0123456789", "ISDIGIT");
222	add("abcdefghijklmnopqrstuvwxyz", "ISLOWER");
223	add("ABCDEFGHIJKLMNOPQRSTUVWXYZ", "ISUPPER");
224	add("_", "ISUNDER");
225	add("#?$!-*@", "ISSPECL");
226	finish();
227
228	exit(0);
229}
230
231
232/*
233 * Output the header and declaration of a syntax table.
234 */
235
236static void
237init(const char *name)
238{
239	fprintf(hfile, "extern const char %s[];\n", name);
240	fprintf(cfile, "const char %s[SYNBASE + CHAR_MAX + 1] = {\n", name);
241}
242
243
244static void
245add_one(const char *key, const char *type)
246{
247	fprintf(cfile, "\t[SYNBASE + %s] = %s,\n", key, type);
248}
249
250
251/*
252 * Add default values to the syntax table.
253 */
254
255static void
256add_default(void)
257{
258	add_one("PEOF",                "CEOF");
259	add_one("CTLESC",              "CCTL");
260	add_one("CTLVAR",              "CCTL");
261	add_one("CTLENDVAR",           "CCTL");
262	add_one("CTLBACKQ",            "CCTL");
263	add_one("CTLBACKQ + CTLQUOTE", "CCTL");
264	add_one("CTLARI",              "CCTL");
265	add_one("CTLENDARI",           "CCTL");
266	add_one("CTLQUOTEMARK",        "CCTL");
267	add_one("CTLQUOTEEND",         "CCTL");
268}
269
270
271/*
272 * Output the footer of a syntax table.
273 */
274
275static void
276finish(void)
277{
278	fputs("};\n", cfile);
279}
280
281
282/*
283 * Add entries to the syntax table.
284 */
285
286static void
287add(const char *p, const char *type)
288{
289	for (; *p; ++p) {
290		char c = *p;
291		switch (c) {
292		case '\t': c = 't';  break;
293		case '\n': c = 'n';  break;
294		case '\'': c = '\''; break;
295		case '\\': c = '\\'; break;
296
297		default:
298			fprintf(cfile, "\t[SYNBASE + '%c'] = %s,\n", c, type);
299			continue;
300		}
301		fprintf(cfile, "\t[SYNBASE + '\\%c'] = %s,\n", c, type);
302	}
303}
304
305
306/*
307 * Output character classification macros (e.g. is_digit).  If digits are
308 * contiguous, we can test for them quickly.
309 */
310
311static const char *macro[] = {
312	"#define is_digit(c)\t((unsigned int)((c) - '0') <= 9)",
313	"#define is_eof(c)\t((c) == PEOF)",
314	"#define is_alpha(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER))",
315	"#define is_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER))",
316	"#define is_in_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))",
317	"#define is_special(c)\t((is_type+SYNBASE)[(int)c] & (ISSPECL|ISDIGIT))",
318	"#define digit_val(c)\t((c) - '0')",
319	NULL
320};
321
322static void
323output_type_macros(void)
324{
325	const char **pp;
326
327	for (pp = macro ; *pp ; pp++)
328		fprintf(hfile, "%s\n", *pp);
329}
330