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 * 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.
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
36 * @(#) Copyright (c) 1991, 1993 The Regents of the University of California. All rights reserved.
37 * @(#)mksyntax.c 8.2 (Berkeley) 5/4/95
38 * $FreeBSD: src/bin/sh/mksyntax.c,v 1.34 2010/11/20 14:30:28 jilles Exp $
42 * This program creates syntax.h and syntax.c.
57 struct synclass synclass[] = {
58 { "CWORD", "character is nothing special" },
59 { "CNL", "newline character" },
60 { "CBACK", "a backslash character" },
61 { "CSQUOTE", "single quote" },
62 { "CDQUOTE", "double quote" },
63 { "CENDQUOTE", "a terminating quote" },
64 { "CBQUOTE", "backwards single quote" },
65 { "CVAR", "a dollar sign" },
66 { "CENDVAR", "a '}' character" },
67 { "CLP", "a left paren in arithmetic" },
68 { "CRP", "a right paren in arithmetic" },
69 { "CEOF", "end of file" },
70 { "CCTL", "like CWORD, except it must be escaped" },
71 { "CSPCL", "these terminate a word" },
72 { "CIGN", "character should be ignored" },
78 * Syntax classes for is_ functions. Warning: if you add new classes
79 * you may have to change the definition of the is_in_name macro.
81 struct synclass is_entry[] = {
82 { "ISDIGIT", "a digit" },
83 { "ISUPPER", "an upper case letter" },
84 { "ISLOWER", "a lower case letter" },
85 { "ISUNDER", "an underscore" },
86 { "ISSPECL", "the name of a special parameter" },
90 static char writer[] = "\
92 * This file was generated by the mksyntax program.\n\
99 static const char *syntax[513];
101 static int size; /* number of values which a char variable can have */
102 static int nbits; /* number of bits in a character */
103 static int digit_contig;/* true if digits are contiguous */
105 static void filltable(const char *);
106 static void init(void);
107 static void add(const char *, const char *);
108 static void print(const char *);
109 static void output_type_macros(void);
110 static void digit_convert(void);
113 main(int argc __unused, char **argv __unused)
121 static char digit[] = "0123456789";
123 /* Create output files */
124 if ((cfile = fopen("syntax.c", "w")) == NULL) {
128 if ((hfile = fopen("syntax.h", "w")) == NULL) {
132 fputs(writer, hfile);
133 fputs(writer, cfile);
135 /* Determine the characteristics of chars. */
137 sign = (c > 0) ? 0 : 1;
138 for (nbits = 1 ; ; nbits++) {
139 d = (1 << nbits) - 1;
144 printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits);
147 fputs("Characters can't have more than 9 bits\n", stderr);
150 size = (1 << nbits) + 1;
153 base += 1 << (nbits - 1);
155 for (i = 0 ; i < 10 ; i++) {
156 if (digit[i] != '0' + i)
160 fputs("#include <sys/cdefs.h>\n", hfile);
161 fputs("#include <ctype.h>\n", hfile);
163 /* Generate the #define statements in the header file */
164 fputs("/* Syntax classes */\n", hfile);
165 for (i = 0 ; synclass[i].name ; i++) {
166 sprintf(buf, "#define %s %d", synclass[i].name, i);
168 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
170 fprintf(hfile, "/* %s */\n", synclass[i].comment);
173 fputs("/* Syntax classes for is_ functions */\n", hfile);
174 for (i = 0 ; is_entry[i].name ; i++) {
175 sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i);
177 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
179 fprintf(hfile, "/* %s */\n", is_entry[i].comment);
182 fprintf(hfile, "#define SYNBASE %d\n", base);
183 fprintf(hfile, "#define PEOF %d\n\n", -base);
185 fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile);
186 fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile);
187 fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile);
188 fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile);
190 output_type_macros(); /* is_digit, etc. */
193 /* Generate the syntax tables. */
194 fputs("#include \"shell.h\"\n", cfile);
195 fputs("#include \"syntax.h\"\n\n", cfile);
197 fputs("/* syntax table used when not in quotes */\n", cfile);
201 add("\"", "CDQUOTE");
205 add("<>();&| \t", "CSPCL");
208 fputs("\n/* syntax table used when in double quotes */\n", cfile);
211 add("\"", "CENDQUOTE");
215 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
216 add("!*?[=~:/-", "CCTL");
219 fputs("\n/* syntax table used when in single quotes */\n", cfile);
221 add("'", "CENDQUOTE");
222 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
223 add("!*?[=~:/-", "CCTL");
226 fputs("\n/* syntax table used when in arithmetic */\n", cfile);
237 fputs("\n/* character classification table */\n", cfile);
238 add("0123456789", "ISDIGIT");
239 add("abcdefghijklmnopqrstuvwxyz", "ISLOWER");
240 add("ABCDEFGHIJKLMNOPQRSTUVWXYZ", "ISUPPER");
242 add("#?$!-*@", "ISSPECL");
252 * Clear the syntax table.
256 filltable(const char *dftval)
260 for (i = 0 ; i < size ; i++)
266 * Initialize the syntax table with default values.
274 syntax[base + CTLESC] = "CCTL";
275 syntax[base + CTLVAR] = "CCTL";
276 syntax[base + CTLENDVAR] = "CCTL";
277 syntax[base + CTLBACKQ] = "CCTL";
278 syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL";
279 syntax[base + CTLARI] = "CCTL";
280 syntax[base + CTLENDARI] = "CCTL";
281 syntax[base + CTLQUOTEMARK] = "CCTL";
282 syntax[base + CTLQUOTEEND] = "CCTL";
287 * Add entries to the syntax table.
291 add(const char *p, const char *type)
294 syntax[*p++ + base] = type;
300 * Output the syntax table.
304 print(const char *name)
309 fprintf(hfile, "extern const char %s[];\n", name);
310 fprintf(cfile, "const char %s[%d] = {\n", name, size);
312 for (i = 0 ; i < size ; i++) {
315 } else if ((i & 03) == 0) {
316 fputs(",\n ", cfile);
320 while (++col < 9 * (i & 03))
323 fputs(syntax[i], cfile);
324 col += strlen(syntax[i]);
326 fputs("\n};\n", cfile);
332 * Output character classification macros (e.g. is_digit). If digits are
333 * contiguous, we can test for them quickly.
336 static const char *macro[] = {
337 "#define is_digit(c)\t((is_type+SYNBASE)[(int)c] & ISDIGIT)",
338 "#define is_eof(c)\t((c) == PEOF)",
339 "#define is_alpha(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER))",
340 "#define is_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER))",
341 "#define is_in_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))",
342 "#define is_special(c)\t((is_type+SYNBASE)[(int)c] & (ISSPECL|ISDIGIT))",
347 output_type_macros(void)
352 macro[0] = "#define is_digit(c)\t((unsigned int)((c) - '0') <= 9)";
353 for (pp = macro ; *pp ; pp++)
354 fprintf(hfile, "%s\n", *pp);
356 fputs("#define digit_val(c)\t((c) - '0')\n", hfile);
358 fputs("#define digit_val(c)\t(digit_value[c])\n", hfile);
364 * Output digit conversion table (if digits are not contiguous).
371 static char digit[] = "0123456789";
376 for (p = digit ; *p ; p++)
379 fputs("extern const char digit_value[];\n", hfile);
380 fputs("\n\nconst char digit_value[] = {\n", cfile);
381 for (i = 0 ; i <= maxdigit ; i++) {
382 for (p = digit ; *p && *p != i ; p++);
385 fprintf(cfile, " %td,\n", p - digit);
387 fputs("};\n", cfile);