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- /*-
- * Copyright (c) 1991 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1991 The Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)mksyntax.c 5.2 (Berkeley) 3/8/91";
- #endif /* not lint */
-
- /*
- * This program creates syntax.h and syntax.c.
- */
-
- #include <stdio.h>
- #include "parser.h"
-
-
- struct synclass {
- char *name;
- char *comment;
- };
-
- /* Syntax classes */
- struct synclass synclass[] = {
- "CWORD", "character is nothing special",
- "CNL", "newline character",
- "CBACK", "a backslash character",
- "CSQUOTE", "single quote",
- "CDQUOTE", "double quote",
- "CENDQUOTE", "a terminating quote",
- "CBQUOTE", "backwards single quote",
- "CVAR", "a dollar sign",
- "CENDVAR", "a '}' character",
- "CEOF", "end of file",
- "CCTL", "like CWORD, except it must be escaped",
- "CSPCL", "these terminate a word",
- NULL, NULL
- };
-
-
- /*
- * Syntax classes for is_ functions. Warning: if you add new classes
- * you may have to change the definition of the is_in_name macro.
- */
- struct synclass is_entry[] = {
- "ISDIGIT", "a digit",
- "ISUPPER", "an upper case letter",
- "ISLOWER", "a lower case letter",
- "ISUNDER", "an underscore",
- "ISSPECL", "the name of a special parameter",
- NULL, NULL,
- };
-
- char writer[] = "\
- /*\n\
- * This file was generated by the mksyntax program.\n\
- */\n\
- \n";
-
-
- FILE *cfile;
- FILE *hfile;
- char *syntax[513];
- int base;
- int size; /* number of values which a char variable can have */
- int nbits; /* number of bits in a character */
- int digit_contig; /* true if digits are contiguous */
-
-
- main() {
- char c;
- char d;
- int sign;
- int i;
- char buf[80];
- int pos;
- static char digit[] = "0123456789";
-
- /* Create output files */
- if ((cfile = fopen("syntax.c", "w")) == NULL) {
- perror("syntax.c");
- exit(2);
- }
- if ((hfile = fopen("syntax.h", "w")) == NULL) {
- perror("syntax.h");
- exit(2);
- }
- fputs(writer, hfile);
- fputs(writer, cfile);
-
- /* Determine the characteristics of chars. */
- c = -1;
- if (c < 0)
- sign = 1;
- else
- sign = 0;
- for (nbits = 1 ; ; nbits++) {
- d = (1 << nbits) - 1;
- if (d == c)
- break;
- }
- printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits);
- if (nbits > 9) {
- fputs("Characters can't have more than 9 bits\n", stderr);
- exit(2);
- }
- size = (1 << nbits) + 1;
- base = 1;
- if (sign)
- base += 1 << (nbits - 1);
- digit_contig = 1;
- for (i = 0 ; i < 10 ; i++) {
- if (digit[i] != '0' + i)
- digit_contig = 0;
- }
-
- fputs("#include <sys/cdefs.h>\n", hfile);
-
- /* Generate the #define statements in the header file */
- fputs("/* Syntax classes */\n", hfile);
- for (i = 0 ; synclass[i].name ; i++) {
- sprintf(buf, "#define %s %d", synclass[i].name, i);
- fputs(buf, hfile);
- for (pos = strlen(buf) ; pos < 32 ; pos = pos + 8 &~ 07)
- putc('\t', hfile);
- fprintf(hfile, "/* %s */\n", synclass[i].comment);
- }
- putc('\n', hfile);
- fputs("/* Syntax classes for is_ functions */\n", hfile);
- for (i = 0 ; is_entry[i].name ; i++) {
- sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i);
- fputs(buf, hfile);
- for (pos = strlen(buf) ; pos < 32 ; pos = pos + 8 &~ 07)
- putc('\t', hfile);
- fprintf(hfile, "/* %s */\n", is_entry[i].comment);
- }
- putc('\n', hfile);
- fprintf(hfile, "#define SYNBASE %d\n", base);
- fprintf(hfile, "#define PEOF %d\n\n", -base);
- putc('\n', hfile);
- fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile);
- fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile);
- fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile);
- putc('\n', hfile);
- output_type_macros(); /* is_digit, etc. */
- putc('\n', hfile);
-
- /* Generate the syntax tables. */
- fputs("#include \"shell.h\"\n", cfile);
- fputs("#include \"syntax.h\"\n\n", cfile);
- init();
- fputs("/* syntax table used when not in quotes */\n", cfile);
- add("\n", "CNL");
- add("\\", "CBACK");
- add("'", "CSQUOTE");
- add("\"", "CDQUOTE");
- add("`", "CBQUOTE");
- add("$", "CVAR");
- add("}", "CENDVAR");
- add("<>();&| \t", "CSPCL");
- print("basesyntax");
- init();
- fputs("\n/* syntax table used when in double quotes */\n", cfile);
- add("\n", "CNL");
- add("\\", "CBACK");
- add("\"", "CENDQUOTE");
- add("`", "CBQUOTE");
- add("$", "CVAR");
- add("}", "CENDVAR");
- add("!*?[=", "CCTL");
- print("dqsyntax");
- init();
- fputs("\n/* syntax table used when in single quotes */\n", cfile);
- add("\n", "CNL");
- add("'", "CENDQUOTE");
- add("!*?[=", "CCTL");
- print("sqsyntax");
- filltable("0");
- fputs("\n/* character classification table */\n", cfile);
- add("0123456789", "ISDIGIT");
- add("abcdefghijklmnopqrstucvwxyz", "ISLOWER");
- add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER");
- add("_", "ISUNDER");
- add("#?$!-*@", "ISSPECL");
- print("is_type");
- if (! digit_contig)
- digit_convert();
- exit(0);
- }
-
-
-
- /*
- * Clear the syntax table.
- */
-
- filltable(dftval)
- char *dftval;
- {
- int i;
-
- for (i = 0 ; i < size ; i++)
- syntax[i] = dftval;
- }
-
-
- /*
- * Initialize the syntax table with default values.
- */
-
- init() {
- filltable("CWORD");
- syntax[0] = "CEOF";
- syntax[base + CTLESC] = "CCTL";
- syntax[base + CTLVAR] = "CCTL";
- syntax[base + CTLENDVAR] = "CCTL";
- syntax[base + CTLBACKQ] = "CCTL";
- syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL";
- }
-
-
- /*
- * Add entries to the syntax table.
- */
-
- add(p, type)
- char *p, *type;
- {
- while (*p)
- syntax[*p++ + base] = type;
- }
-
-
-
- /*
- * Output the syntax table.
- */
-
- print(name)
- char *name;
- {
- int i;
- int col;
-
- fprintf(hfile, "extern const char %s[];\n", name);
- fprintf(cfile, "const char %s[%d] = {\n", name, size);
- col = 0;
- for (i = 0 ; i < size ; i++) {
- if (i == 0) {
- fputs(" ", cfile);
- } else if ((i & 03) == 0) {
- fputs(",\n ", cfile);
- col = 0;
- } else {
- putc(',', cfile);
- while (++col < 9 * (i & 03))
- putc(' ', cfile);
- }
- fputs(syntax[i], cfile);
- col += strlen(syntax[i]);
- }
- fputs("\n};\n", cfile);
- }
-
-
-
- /*
- * Output character classification macros (e.g. is_digit). If digits are
- * contiguous, we can test for them quickly.
- */
-
- char *macro[] = {
- "#define is_digit(c)\t((is_type+SYNBASE)[c] & ISDIGIT)",
- "#define is_alpha(c)\t((is_type+SYNBASE)[c] & (ISUPPER|ISLOWER))",
- "#define is_name(c)\t((is_type+SYNBASE)[c] & (ISUPPER|ISLOWER|ISUNDER))",
- "#define is_in_name(c)\t((is_type+SYNBASE)[c] & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))",
- "#define is_special(c)\t((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))",
- NULL
- };
-
- output_type_macros() {
- char **pp;
-
- if (digit_contig)
- macro[0] = "#define is_digit(c)\t((unsigned)((c) - '0') <= 9)";
- for (pp = macro ; *pp ; pp++)
- fprintf(hfile, "%s\n", *pp);
- if (digit_contig)
- fputs("#define digit_val(c)\t((c) - '0')\n", hfile);
- else
- fputs("#define digit_val(c)\t(digit_value[c])\n", hfile);
- }
-
-
-
- /*
- * Output digit conversion table (if digits are not contiguous).
- */
-
- digit_convert() {
- int maxdigit;
- static char digit[] = "0123456789";
- char *p;
- int i;
-
- maxdigit = 0;
- for (p = digit ; *p ; p++)
- if (*p > maxdigit)
- maxdigit = *p;
- fputs("extern const char digit_value[];\n", hfile);
- fputs("\n\nconst char digit_value[] = {\n", cfile);
- for (i = 0 ; i <= maxdigit ; i++) {
- for (p = digit ; *p && *p != i ; p++);
- if (*p == '\0')
- p = digit;
- fprintf(cfile, " %d,\n", p - digit);
- }
- fputs("};\n", cfile);
- }
-