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af3e82f7 WJ |
1 | /*- |
2 | * Copyright (c) 1991 The Regents of the University of California. | |
3 | * 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 | * 3. All advertising materials mentioning features or use of this software | |
17 | * must display the following acknowledgement: | |
18 | * This product includes software developed by the University of | |
19 | * California, Berkeley and its contributors. | |
20 | * 4. Neither the name of the University nor the names of its contributors | |
21 | * may be used to endorse or promote products derived from this software | |
22 | * without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | * SUCH DAMAGE. | |
35 | */ | |
36 | ||
37 | #ifndef lint | |
38 | char copyright[] = | |
39 | "@(#) Copyright (c) 1991 The Regents of the University of California.\n\ | |
40 | All rights reserved.\n"; | |
41 | #endif /* not lint */ | |
42 | ||
43 | #ifndef lint | |
44 | static char sccsid[] = "@(#)mksyntax.c 5.2 (Berkeley) 3/8/91"; | |
45 | #endif /* not lint */ | |
46 | ||
47 | /* | |
48 | * This program creates syntax.h and syntax.c. | |
49 | */ | |
50 | ||
51 | #include <stdio.h> | |
52 | #include "parser.h" | |
53 | ||
54 | ||
55 | struct synclass { | |
56 | char *name; | |
57 | char *comment; | |
58 | }; | |
59 | ||
60 | /* Syntax classes */ | |
61 | struct synclass synclass[] = { | |
62 | "CWORD", "character is nothing special", | |
63 | "CNL", "newline character", | |
64 | "CBACK", "a backslash character", | |
65 | "CSQUOTE", "single quote", | |
66 | "CDQUOTE", "double quote", | |
67 | "CENDQUOTE", "a terminating quote", | |
68 | "CBQUOTE", "backwards single quote", | |
69 | "CVAR", "a dollar sign", | |
70 | "CENDVAR", "a '}' character", | |
71 | "CEOF", "end of file", | |
72 | "CCTL", "like CWORD, except it must be escaped", | |
73 | "CSPCL", "these terminate a word", | |
74 | NULL, NULL | |
75 | }; | |
76 | ||
77 | ||
78 | /* | |
79 | * Syntax classes for is_ functions. Warning: if you add new classes | |
80 | * you may have to change the definition of the is_in_name macro. | |
81 | */ | |
82 | struct synclass is_entry[] = { | |
83 | "ISDIGIT", "a digit", | |
84 | "ISUPPER", "an upper case letter", | |
85 | "ISLOWER", "a lower case letter", | |
86 | "ISUNDER", "an underscore", | |
87 | "ISSPECL", "the name of a special parameter", | |
88 | NULL, NULL, | |
89 | }; | |
90 | ||
91 | char writer[] = "\ | |
92 | /*\n\ | |
93 | * This file was generated by the mksyntax program.\n\ | |
94 | */\n\ | |
95 | \n"; | |
96 | ||
97 | ||
98 | FILE *cfile; | |
99 | FILE *hfile; | |
100 | char *syntax[513]; | |
101 | int base; | |
102 | int size; /* number of values which a char variable can have */ | |
103 | int nbits; /* number of bits in a character */ | |
104 | int digit_contig; /* true if digits are contiguous */ | |
105 | ||
106 | ||
107 | main() { | |
108 | char c; | |
109 | char d; | |
110 | int sign; | |
111 | int i; | |
112 | char buf[80]; | |
113 | int pos; | |
114 | static char digit[] = "0123456789"; | |
115 | ||
116 | /* Create output files */ | |
117 | if ((cfile = fopen("syntax.c", "w")) == NULL) { | |
118 | perror("syntax.c"); | |
119 | exit(2); | |
120 | } | |
121 | if ((hfile = fopen("syntax.h", "w")) == NULL) { | |
122 | perror("syntax.h"); | |
123 | exit(2); | |
124 | } | |
125 | fputs(writer, hfile); | |
126 | fputs(writer, cfile); | |
127 | ||
128 | /* Determine the characteristics of chars. */ | |
129 | c = -1; | |
130 | if (c < 0) | |
131 | sign = 1; | |
132 | else | |
133 | sign = 0; | |
134 | for (nbits = 1 ; ; nbits++) { | |
135 | d = (1 << nbits) - 1; | |
136 | if (d == c) | |
137 | break; | |
138 | } | |
139 | printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits); | |
140 | if (nbits > 9) { | |
141 | fputs("Characters can't have more than 9 bits\n", stderr); | |
142 | exit(2); | |
143 | } | |
144 | size = (1 << nbits) + 1; | |
145 | base = 1; | |
146 | if (sign) | |
147 | base += 1 << (nbits - 1); | |
148 | digit_contig = 1; | |
149 | for (i = 0 ; i < 10 ; i++) { | |
150 | if (digit[i] != '0' + i) | |
151 | digit_contig = 0; | |
152 | } | |
153 | ||
154 | fputs("#include <sys/cdefs.h>\n", hfile); | |
155 | ||
156 | /* Generate the #define statements in the header file */ | |
157 | fputs("/* Syntax classes */\n", hfile); | |
158 | for (i = 0 ; synclass[i].name ; i++) { | |
159 | sprintf(buf, "#define %s %d", synclass[i].name, i); | |
160 | fputs(buf, hfile); | |
161 | for (pos = strlen(buf) ; pos < 32 ; pos = pos + 8 &~ 07) | |
162 | putc('\t', hfile); | |
163 | fprintf(hfile, "/* %s */\n", synclass[i].comment); | |
164 | } | |
165 | putc('\n', hfile); | |
166 | fputs("/* Syntax classes for is_ functions */\n", hfile); | |
167 | for (i = 0 ; is_entry[i].name ; i++) { | |
168 | sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i); | |
169 | fputs(buf, hfile); | |
170 | for (pos = strlen(buf) ; pos < 32 ; pos = pos + 8 &~ 07) | |
171 | putc('\t', hfile); | |
172 | fprintf(hfile, "/* %s */\n", is_entry[i].comment); | |
173 | } | |
174 | putc('\n', hfile); | |
175 | fprintf(hfile, "#define SYNBASE %d\n", base); | |
176 | fprintf(hfile, "#define PEOF %d\n\n", -base); | |
177 | putc('\n', hfile); | |
178 | fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile); | |
179 | fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile); | |
180 | fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile); | |
181 | putc('\n', hfile); | |
182 | output_type_macros(); /* is_digit, etc. */ | |
183 | putc('\n', hfile); | |
184 | ||
185 | /* Generate the syntax tables. */ | |
186 | fputs("#include \"shell.h\"\n", cfile); | |
187 | fputs("#include \"syntax.h\"\n\n", cfile); | |
188 | init(); | |
189 | fputs("/* syntax table used when not in quotes */\n", cfile); | |
190 | add("\n", "CNL"); | |
191 | add("\\", "CBACK"); | |
192 | add("'", "CSQUOTE"); | |
193 | add("\"", "CDQUOTE"); | |
194 | add("`", "CBQUOTE"); | |
195 | add("$", "CVAR"); | |
196 | add("}", "CENDVAR"); | |
197 | add("<>();&| \t", "CSPCL"); | |
198 | print("basesyntax"); | |
199 | init(); | |
200 | fputs("\n/* syntax table used when in double quotes */\n", cfile); | |
201 | add("\n", "CNL"); | |
202 | add("\\", "CBACK"); | |
203 | add("\"", "CENDQUOTE"); | |
204 | add("`", "CBQUOTE"); | |
205 | add("$", "CVAR"); | |
206 | add("}", "CENDVAR"); | |
207 | add("!*?[=", "CCTL"); | |
208 | print("dqsyntax"); | |
209 | init(); | |
210 | fputs("\n/* syntax table used when in single quotes */\n", cfile); | |
211 | add("\n", "CNL"); | |
212 | add("'", "CENDQUOTE"); | |
213 | add("!*?[=", "CCTL"); | |
214 | print("sqsyntax"); | |
215 | filltable("0"); | |
216 | fputs("\n/* character classification table */\n", cfile); | |
217 | add("0123456789", "ISDIGIT"); | |
218 | add("abcdefghijklmnopqrstucvwxyz", "ISLOWER"); | |
219 | add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER"); | |
220 | add("_", "ISUNDER"); | |
221 | add("#?$!-*@", "ISSPECL"); | |
222 | print("is_type"); | |
223 | if (! digit_contig) | |
224 | digit_convert(); | |
225 | exit(0); | |
226 | } | |
227 | ||
228 | ||
229 | ||
230 | /* | |
231 | * Clear the syntax table. | |
232 | */ | |
233 | ||
234 | filltable(dftval) | |
235 | char *dftval; | |
236 | { | |
237 | int i; | |
238 | ||
239 | for (i = 0 ; i < size ; i++) | |
240 | syntax[i] = dftval; | |
241 | } | |
242 | ||
243 | ||
244 | /* | |
245 | * Initialize the syntax table with default values. | |
246 | */ | |
247 | ||
248 | init() { | |
249 | filltable("CWORD"); | |
250 | syntax[0] = "CEOF"; | |
251 | syntax[base + CTLESC] = "CCTL"; | |
252 | syntax[base + CTLVAR] = "CCTL"; | |
253 | syntax[base + CTLENDVAR] = "CCTL"; | |
254 | syntax[base + CTLBACKQ] = "CCTL"; | |
255 | syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL"; | |
256 | } | |
257 | ||
258 | ||
259 | /* | |
260 | * Add entries to the syntax table. | |
261 | */ | |
262 | ||
263 | add(p, type) | |
264 | char *p, *type; | |
265 | { | |
266 | while (*p) | |
267 | syntax[*p++ + base] = type; | |
268 | } | |
269 | ||
270 | ||
271 | ||
272 | /* | |
273 | * Output the syntax table. | |
274 | */ | |
275 | ||
276 | print(name) | |
277 | char *name; | |
278 | { | |
279 | int i; | |
280 | int col; | |
281 | ||
282 | fprintf(hfile, "extern const char %s[];\n", name); | |
283 | fprintf(cfile, "const char %s[%d] = {\n", name, size); | |
284 | col = 0; | |
285 | for (i = 0 ; i < size ; i++) { | |
286 | if (i == 0) { | |
287 | fputs(" ", cfile); | |
288 | } else if ((i & 03) == 0) { | |
289 | fputs(",\n ", cfile); | |
290 | col = 0; | |
291 | } else { | |
292 | putc(',', cfile); | |
293 | while (++col < 9 * (i & 03)) | |
294 | putc(' ', cfile); | |
295 | } | |
296 | fputs(syntax[i], cfile); | |
297 | col += strlen(syntax[i]); | |
298 | } | |
299 | fputs("\n};\n", cfile); | |
300 | } | |
301 | ||
302 | ||
303 | ||
304 | /* | |
305 | * Output character classification macros (e.g. is_digit). If digits are | |
306 | * contiguous, we can test for them quickly. | |
307 | */ | |
308 | ||
309 | char *macro[] = { | |
310 | "#define is_digit(c)\t((is_type+SYNBASE)[c] & ISDIGIT)", | |
311 | "#define is_alpha(c)\t((is_type+SYNBASE)[c] & (ISUPPER|ISLOWER))", | |
312 | "#define is_name(c)\t((is_type+SYNBASE)[c] & (ISUPPER|ISLOWER|ISUNDER))", | |
313 | "#define is_in_name(c)\t((is_type+SYNBASE)[c] & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))", | |
314 | "#define is_special(c)\t((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))", | |
315 | NULL | |
316 | }; | |
317 | ||
318 | output_type_macros() { | |
319 | char **pp; | |
320 | ||
321 | if (digit_contig) | |
322 | macro[0] = "#define is_digit(c)\t((unsigned)((c) - '0') <= 9)"; | |
323 | for (pp = macro ; *pp ; pp++) | |
324 | fprintf(hfile, "%s\n", *pp); | |
325 | if (digit_contig) | |
326 | fputs("#define digit_val(c)\t((c) - '0')\n", hfile); | |
327 | else | |
328 | fputs("#define digit_val(c)\t(digit_value[c])\n", hfile); | |
329 | } | |
330 | ||
331 | ||
332 | ||
333 | /* | |
334 | * Output digit conversion table (if digits are not contiguous). | |
335 | */ | |
336 | ||
337 | digit_convert() { | |
338 | int maxdigit; | |
339 | static char digit[] = "0123456789"; | |
340 | char *p; | |
341 | int i; | |
342 | ||
343 | maxdigit = 0; | |
344 | for (p = digit ; *p ; p++) | |
345 | if (*p > maxdigit) | |
346 | maxdigit = *p; | |
347 | fputs("extern const char digit_value[];\n", hfile); | |
348 | fputs("\n\nconst char digit_value[] = {\n", cfile); | |
349 | for (i = 0 ; i <= maxdigit ; i++) { | |
350 | for (p = digit ; *p && *p != i ; p++); | |
351 | if (*p == '\0') | |
352 | p = digit; | |
353 | fprintf(cfile, " %d,\n", p - digit); | |
354 | } | |
355 | fputs("};\n", cfile); | |
356 | } |