2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
35 static char const copyright[] =
36 "@(#) Copyright (c) 1991, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
41 static char sccsid[] = "@(#)mksyntax.c 8.2 (Berkeley) 5/4/95";
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
48 * This program creates syntax.h and syntax.c.
63 struct synclass synclass[] = {
64 { "CWORD", "character is nothing special" },
65 { "CNL", "newline character" },
66 { "CBACK", "a backslash character" },
67 { "CSQUOTE", "single quote" },
68 { "CDQUOTE", "double quote" },
69 { "CENDQUOTE", "a terminating quote" },
70 { "CBQUOTE", "backwards single quote" },
71 { "CVAR", "a dollar sign" },
72 { "CENDVAR", "a '}' character" },
73 { "CLP", "a left paren in arithmetic" },
74 { "CRP", "a right paren in arithmetic" },
75 { "CEOF", "end of file" },
76 { "CCTL", "like CWORD, except it must be escaped" },
77 { "CSPCL", "these terminate a word" },
83 * Syntax classes for is_ functions. Warning: if you add new classes
84 * you may have to change the definition of the is_in_name macro.
86 struct synclass is_entry[] = {
87 { "ISDIGIT", "a digit" },
88 { "ISUPPER", "an upper case letter" },
89 { "ISLOWER", "a lower case letter" },
90 { "ISUNDER", "an underscore" },
91 { "ISSPECL", "the name of a special parameter" },
95 static char writer[] = "\
97 * This file was generated by the mksyntax program.\n\
104 static const char *syntax[513];
106 static int size; /* number of values which a char variable can have */
107 static int nbits; /* number of bits in a character */
109 static void filltable(const char *);
110 static void init(void);
111 static void add(const char *, const char *);
112 static void print(const char *);
113 static void output_type_macros(void);
116 main(int argc __unused, char **argv __unused)
125 /* Create output files */
126 if ((cfile = fopen("syntax.c", "w")) == NULL) {
130 if ((hfile = fopen("syntax.h", "w")) == NULL) {
134 fputs(writer, hfile);
135 fputs(writer, cfile);
137 /* Determine the characteristics of chars. */
139 sign = (c > 0) ? 0 : 1;
140 for (nbits = 1 ; ; nbits++) {
141 d = (1 << nbits) - 1;
146 printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits);
149 fputs("Characters can't have more than 9 bits\n", stderr);
152 size = (1 << nbits) + 1;
155 base += 1 << (nbits - 1);
157 fputs("#include <sys/cdefs.h>\n", hfile);
158 fputs("#include <ctype.h>\n", hfile);
160 /* Generate the #define statements in the header file */
161 fputs("/* Syntax classes */\n", hfile);
162 for (i = 0 ; synclass[i].name ; i++) {
163 sprintf(buf, "#define %s %d", synclass[i].name, i);
165 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
167 fprintf(hfile, "/* %s */\n", synclass[i].comment);
170 fputs("/* Syntax classes for is_ functions */\n", hfile);
171 for (i = 0 ; is_entry[i].name ; i++) {
172 sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i);
174 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
176 fprintf(hfile, "/* %s */\n", is_entry[i].comment);
179 fprintf(hfile, "#define SYNBASE %d\n", base);
180 fprintf(hfile, "#define PEOF %d\n\n", -base);
182 fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile);
183 fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile);
184 fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile);
185 fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile);
187 output_type_macros(); /* is_digit, etc. */
190 /* Generate the syntax tables. */
191 fputs("#include \"shell.h\"\n", cfile);
192 fputs("#include \"syntax.h\"\n\n", cfile);
194 fputs("/* syntax table used when not in quotes */\n", cfile);
198 add("\"", "CDQUOTE");
202 add("<>();&| \t", "CSPCL");
205 fputs("\n/* syntax table used when in double quotes */\n", cfile);
208 add("\"", "CENDQUOTE");
212 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
213 add("!*?[=~:/-", "CCTL");
216 fputs("\n/* syntax table used when in single quotes */\n", cfile);
218 add("'", "CENDQUOTE");
219 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
220 add("!*?[=~:/-", "CCTL");
223 fputs("\n/* syntax table used when in arithmetic */\n", cfile);
228 add("\"", "CDQUOTE");
235 fputs("\n/* character classification table */\n", cfile);
236 add("0123456789", "ISDIGIT");
237 add("abcdefghijklmnopqrstucvwxyz", "ISLOWER");
238 add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER");
240 add("#?$!-*@", "ISSPECL");
248 * Clear the syntax table.
252 filltable(const char *dftval)
256 for (i = 0 ; i < size ; i++)
262 * Initialize the syntax table with default values.
270 syntax[base + CTLESC] = "CCTL";
271 syntax[base + CTLVAR] = "CCTL";
272 syntax[base + CTLENDVAR] = "CCTL";
273 syntax[base + CTLBACKQ] = "CCTL";
274 syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL";
275 syntax[base + CTLARI] = "CCTL";
276 syntax[base + CTLENDARI] = "CCTL";
277 syntax[base + CTLQUOTEMARK] = "CCTL";
282 * Add entries to the syntax table.
286 add(const char *p, const char *type)
289 syntax[*p++ + base] = type;
295 * Output the syntax table.
299 print(const char *name)
304 fprintf(hfile, "extern const char %s[];\n", name);
305 fprintf(cfile, "const char %s[%d] = {\n", name, size);
307 for (i = 0 ; i < size ; i++) {
310 } else if ((i & 03) == 0) {
311 fputs(",\n ", cfile);
315 while (++col < 9 * (i & 03))
318 fputs(syntax[i], cfile);
319 col += strlen(syntax[i]);
321 fputs("\n};\n", cfile);
327 * Output character classification macros (e.g. is_digit). If digits are
328 * contiguous, we can test for them quickly.
331 static const char *macro[] = {
332 "#define is_digit(c)\t((unsigned int)((c) - '0') <= 9)",
333 "#define is_eof(c)\t((c) == PEOF)",
334 "#define is_alpha(c)\t(((c) < CTLESC || (c) > CTLQUOTEMARK) && isalpha((unsigned char) (c)))",
335 "#define is_name(c)\t(((c) < CTLESC || (c) > CTLQUOTEMARK) && ((c) == '_' || isalpha((unsigned char) (c))))",
336 "#define is_in_name(c)\t(((c) < CTLESC || (c) > CTLQUOTEMARK) && ((c) == '_' || isalnum((unsigned char) (c))))",
337 "#define is_special(c)\t((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))",
338 "#define digit_val(c)\t((c) - '0')",
343 output_type_macros(void)
347 for (pp = macro ; *pp ; pp++)
348 fprintf(hfile, "%s\n", *pp);