1 /*-
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1997-2005
5 * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Kenneth Almquist.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 /*
36 * This program creates syntax.h and syntax.c.
37 */
38
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <sys/types.h>
43 #include "parser.h"
44
45
46 struct synclass {
47 char *name;
48 char *comment;
49 };
50
51 /* Syntax classes */
52 struct synclass synclass[] = {
53 { "CWORD", "character is nothing special" },
54 { "CNL", "newline character" },
55 { "CBACK", "a backslash character" },
56 { "CSQUOTE", "single quote" },
57 { "CDQUOTE", "double quote" },
58 { "CENDQUOTE", "a terminating quote" },
59 { "CBQUOTE", "backwards single quote" },
60 { "CVAR", "a dollar sign" },
61 { "CENDVAR", "a '}' character" },
62 { "CLP", "a left paren in arithmetic" },
63 { "CRP", "a right paren in arithmetic" },
64 { "CEOF", "end of file" },
65 { "CCTL", "like CWORD, except it must be escaped" },
66 { "CSPCL", "these terminate a word" },
67 { "CIGN", "character should be ignored" },
68 { NULL, NULL }
69 };
70
71
72 /*
73 * Syntax classes for is_ functions. Warning: if you add new classes
74 * you may have to change the definition of the is_in_name macro.
75 */
76 struct synclass is_entry[] = {
77 { "ISDIGIT", "a digit" },
78 { "ISUPPER", "an upper case letter" },
79 { "ISLOWER", "a lower case letter" },
80 { "ISUNDER", "an underscore" },
81 { "ISSPECL", "the name of a special parameter" },
82 { NULL, NULL }
83 };
84
85 static char writer[] = "\
86 /*\n\
87 * This file was generated by the mksyntax program.\n\
88 */\n\
89 \n";
90
91
92 static FILE *cfile;
93 static FILE *hfile;
94 static char *syntax[513];
95
96 static void filltable(char *);
97 static void init(void);
98 static void add(char *, char *);
99 static void print(char *);
100 static void output_type_macros(void);
101 int main(int, char **);
102
103 int
main(int argc,char ** argv)104 main(int argc, char **argv)
105 {
106 int i;
107 char buf[80];
108 int pos;
109
110 /* Create output files */
111 if ((cfile = fopen("syntax.c", "w")) == NULL) {
112 perror("syntax.c");
113 exit(2);
114 }
115 if ((hfile = fopen("syntax.h", "w")) == NULL) {
116 perror("syntax.h");
117 exit(2);
118 }
119 fputs(writer, hfile);
120 fputs(writer, cfile);
121
122 fputs("#include <ctype.h>\n", hfile);
123 fputs("\n", hfile);
124 fputs("#ifdef CEOF\n", hfile);
125 fputs("#undef CEOF\n", hfile);
126 fputs("#endif\n", hfile);
127 fputs("\n", hfile);
128
129 /* Generate the #define statements in the header file */
130 fputs("/* Syntax classes */\n", hfile);
131 for (i = 0 ; synclass[i].name ; i++) {
132 sprintf(buf, "#define %s %d", synclass[i].name, i);
133 fputs(buf, hfile);
134 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
135 putc('\t', hfile);
136 fprintf(hfile, "/* %s */\n", synclass[i].comment);
137 }
138 putc('\n', hfile);
139 fputs("/* Syntax classes for is_ functions */\n", hfile);
140 for (i = 0 ; is_entry[i].name ; i++) {
141 sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i);
142 fputs(buf, hfile);
143 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
144 putc('\t', hfile);
145 fprintf(hfile, "/* %s */\n", is_entry[i].comment);
146 }
147 putc('\n', hfile);
148 fprintf(hfile, "#define SYNBASE %d\n", 130);
149 fprintf(hfile, "#define PEOF %d\n\n", -130);
150 fprintf(hfile, "#define PEOA %d\n\n", -129);
151 putc('\n', hfile);
152 fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile);
153 fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile);
154 fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile);
155 fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile);
156 putc('\n', hfile);
157 output_type_macros(); /* is_digit, etc. */
158 putc('\n', hfile);
159
160 /* Generate the syntax tables. */
161 fputs("#include \"shell.h\"\n", cfile);
162 fputs("#include \"syntax.h\"\n\n", cfile);
163 init();
164 fputs("/* syntax table used when not in quotes */\n", cfile);
165 add("\n", "CNL");
166 add("\\", "CBACK");
167 add("'", "CSQUOTE");
168 add("\"", "CDQUOTE");
169 add("`", "CBQUOTE");
170 add("$", "CVAR");
171 add("}", "CENDVAR");
172 add("<>();&| \t", "CSPCL");
173 syntax[1] = "CSPCL";
174 print("basesyntax");
175 init();
176 fputs("\n/* syntax table used when in double quotes */\n", cfile);
177 add("\n", "CNL");
178 add("\\", "CBACK");
179 add("\"", "CENDQUOTE");
180 add("`", "CBQUOTE");
181 add("$", "CVAR");
182 add("}", "CENDVAR");
183 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
184 add("!*?[=~:/-]", "CCTL");
185 print("dqsyntax");
186 init();
187 fputs("\n/* syntax table used when in single quotes */\n", cfile);
188 add("\n", "CNL");
189 add("'", "CENDQUOTE");
190 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
191 add("!*?[=~:/-]\\", "CCTL");
192 print("sqsyntax");
193 init();
194 fputs("\n/* syntax table used when in arithmetic */\n", cfile);
195 add("\n", "CNL");
196 add("\\", "CBACK");
197 add("`", "CBQUOTE");
198 add("$", "CVAR");
199 add("}", "CENDVAR");
200 add("(", "CLP");
201 add(")", "CRP");
202 print("arisyntax");
203 filltable("0");
204 fputs("\n/* character classification table */\n", cfile);
205 add("0123456789", "ISDIGIT");
206 add("abcdefghijklmnopqrstucvwxyz", "ISLOWER");
207 add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER");
208 add("_", "ISUNDER");
209 add("#?$!-*@", "ISSPECL");
210 print("is_type");
211 exit(0);
212 /* NOTREACHED */
213 }
214
215
216
217 /*
218 * Clear the syntax table.
219 */
220
221 static void
filltable(char * dftval)222 filltable(char *dftval)
223 {
224 int i;
225
226 for (i = 0 ; i < 258; i++)
227 syntax[i] = dftval;
228 }
229
230
231 /*
232 * Initialize the syntax table with default values.
233 */
234
235 static void
init(void)236 init(void)
237 {
238 int ctl;
239
240 filltable("CWORD");
241 syntax[0] = "CEOF";
242 syntax[1] = "CIGN";
243 for (ctl = CTL_FIRST; ctl <= CTL_LAST; ctl++ )
244 syntax[130 + ctl] = "CCTL";
245 }
246
247
248 /*
249 * Add entries to the syntax table.
250 */
251
252 static void
add(char * p,char * type)253 add(char *p, char *type)
254 {
255 while (*p)
256 syntax[(signed char)*p++ + 130] = type;
257 }
258
259
260
261 /*
262 * Output the syntax table.
263 */
264
265 static void
print(char * name)266 print(char *name)
267 {
268 int i;
269 int col;
270
271 fprintf(hfile, "extern const char %s[];\n", name);
272 fprintf(cfile, "const char %s[] = {\n", name);
273 col = 0;
274 for (i = 0 ; i < 258; i++) {
275 if (i == 0) {
276 fputs(" ", cfile);
277 } else if ((i & 03) == 0) {
278 fputs(",\n ", cfile);
279 col = 0;
280 } else {
281 putc(',', cfile);
282 while (++col < 9 * (i & 03))
283 putc(' ', cfile);
284 }
285 fputs(syntax[i], cfile);
286 col += strlen(syntax[i]);
287 }
288 fputs("\n};\n", cfile);
289 }
290
291
292
293 /*
294 * Output character classification macros (e.g. is_digit). If digits are
295 * contiguous, we can test for them quickly.
296 */
297
298 static char *macro[] = {
299 "#define is_digit(c)\t((unsigned)((c) - '0') <= 9)\n",
300 "#define is_alpha(c)\tisalpha((unsigned char)(c))\n",
301 "#define is_name(c)\t((c) == '_' || isalpha((unsigned char)(c)))\n",
302 "#define is_in_name(c)\t((c) == '_' || isalnum((unsigned char)(c)))\n",
303 "#define is_special(c)\t((is_type+SYNBASE)[(signed char)(c)] & (ISSPECL|ISDIGIT))\n",
304 NULL
305 };
306
307 static void
output_type_macros(void)308 output_type_macros(void)
309 {
310 char **pp;
311
312 for (pp = macro ; *pp ; pp++)
313 fputs(*pp, hfile);
314 fputs("#define digit_val(c)\t((c) - '0')\n", hfile);
315 }
316