333 lines
8.8 KiB
C
333 lines
8.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static char const copyright[] =
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"@(#) Copyright (c) 1991, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)mksyntax.c 8.2 (Berkeley) 5/4/95";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* This program creates syntax.h and syntax.c.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "parser.h"
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struct synclass {
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const char *name;
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const char *comment;
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};
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/* Syntax classes */
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static const struct synclass synclass[] = {
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{ "CWORD", "character is nothing special" },
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{ "CNL", "newline character" },
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{ "CQNL", "newline character in quotes" },
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{ "CBACK", "a backslash character" },
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{ "CSBACK", "a backslash character in single quotes" },
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{ "CSQUOTE", "single quote" },
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{ "CDQUOTE", "double quote" },
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{ "CENDQUOTE", "a terminating quote" },
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{ "CBQUOTE", "backwards single quote" },
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{ "CVAR", "a dollar sign" },
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{ "CENDVAR", "a '}' character" },
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{ "CLP", "a left paren in arithmetic" },
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{ "CRP", "a right paren in arithmetic" },
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{ "CEOF", "end of file" },
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{ "CCTL", "like CWORD, except it must be escaped" },
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{ "CSPCL", "these terminate a word" },
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{ "CIGN", "character should be ignored" },
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{ NULL, NULL }
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};
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/*
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* Syntax classes for is_ functions. Warning: if you add new classes
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* you may have to change the definition of the is_in_name macro.
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*/
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static const struct synclass is_entry[] = {
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{ "ISDIGIT", "a digit" },
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{ "ISUPPER", "an upper case letter" },
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{ "ISLOWER", "a lower case letter" },
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{ "ISUNDER", "an underscore" },
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{ "ISSPECL", "the name of a special parameter" },
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{ NULL, NULL }
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};
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static const char writer[] = "\
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/*\n\
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* This file was generated by the mksyntax program.\n\
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*/\n\
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\n";
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static FILE *cfile;
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static FILE *hfile;
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static void add_default(void);
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static void finish(void);
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static void init(const char *);
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static void add(const char *, const char *);
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static void output_type_macros(void);
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int
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main(int argc __unused, char **argv __unused)
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{
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int i;
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char buf[80];
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int pos;
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/* Create output files */
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if ((cfile = fopen("syntax.c", "w")) == NULL) {
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perror("syntax.c");
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exit(2);
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}
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if ((hfile = fopen("syntax.h", "w")) == NULL) {
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perror("syntax.h");
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exit(2);
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}
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fputs(writer, hfile);
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fputs(writer, cfile);
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fputs("#include <sys/cdefs.h>\n", hfile);
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fputs("#include <limits.h>\n\n", hfile);
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/* Generate the #define statements in the header file */
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fputs("/* Syntax classes */\n", hfile);
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for (i = 0 ; synclass[i].name ; i++) {
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sprintf(buf, "#define %s %d", synclass[i].name, i);
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fputs(buf, hfile);
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for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
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putc('\t', hfile);
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fprintf(hfile, "/* %s */\n", synclass[i].comment);
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}
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putc('\n', hfile);
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fputs("/* Syntax classes for is_ functions */\n", hfile);
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for (i = 0 ; is_entry[i].name ; i++) {
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sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i);
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fputs(buf, hfile);
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for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
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putc('\t', hfile);
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fprintf(hfile, "/* %s */\n", is_entry[i].comment);
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}
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putc('\n', hfile);
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fputs("#define SYNBASE (1 - CHAR_MIN)\n", hfile);
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fputs("#define PEOF -SYNBASE\n\n", hfile);
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putc('\n', hfile);
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fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile);
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fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile);
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fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile);
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fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile);
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putc('\n', hfile);
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output_type_macros(); /* is_digit, etc. */
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putc('\n', hfile);
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/* Generate the syntax tables. */
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fputs("#include \"parser.h\"\n", cfile);
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fputs("#include \"shell.h\"\n", cfile);
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fputs("#include \"syntax.h\"\n\n", cfile);
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fputs("/* syntax table used when not in quotes */\n", cfile);
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init("basesyntax");
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add_default();
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add("\n", "CNL");
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add("\\", "CBACK");
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add("'", "CSQUOTE");
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add("\"", "CDQUOTE");
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add("`", "CBQUOTE");
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add("$", "CVAR");
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add("}", "CENDVAR");
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add("<>();&| \t", "CSPCL");
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finish();
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fputs("\n/* syntax table used when in double quotes */\n", cfile);
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init("dqsyntax");
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add_default();
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add("\n", "CQNL");
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add("\\", "CBACK");
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add("\"", "CENDQUOTE");
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add("`", "CBQUOTE");
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add("$", "CVAR");
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add("}", "CENDVAR");
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/* ':/' for tilde expansion, '-^]' for [a\-x] pattern ranges */
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add("!*?[]=~:/-^", "CCTL");
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finish();
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fputs("\n/* syntax table used when in single quotes */\n", cfile);
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init("sqsyntax");
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add_default();
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add("\n", "CQNL");
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add("\\", "CSBACK");
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add("'", "CENDQUOTE");
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/* ':/' for tilde expansion, '-^]' for [a\-x] pattern ranges */
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add("!*?[]=~:/-^", "CCTL");
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finish();
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fputs("\n/* syntax table used when in arithmetic */\n", cfile);
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init("arisyntax");
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add_default();
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add("\n", "CQNL");
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add("\\", "CBACK");
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add("`", "CBQUOTE");
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add("\"", "CIGN");
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add("$", "CVAR");
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add("}", "CENDVAR");
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add("(", "CLP");
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add(")", "CRP");
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finish();
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fputs("\n/* character classification table */\n", cfile);
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init("is_type");
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add("0123456789", "ISDIGIT");
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add("abcdefghijklmnopqrstuvwxyz", "ISLOWER");
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add("ABCDEFGHIJKLMNOPQRSTUVWXYZ", "ISUPPER");
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add("_", "ISUNDER");
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add("#?$!-*@", "ISSPECL");
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finish();
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exit(0);
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}
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/*
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* Output the header and declaration of a syntax table.
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*/
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static void
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init(const char *name)
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{
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fprintf(hfile, "extern const char %s[];\n", name);
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fprintf(cfile, "const char %s[SYNBASE + CHAR_MAX + 1] = {\n", name);
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}
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static void
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add_one(const char *key, const char *type)
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{
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fprintf(cfile, "\t[SYNBASE + %s] = %s,\n", key, type);
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}
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/*
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* Add default values to the syntax table.
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*/
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static void
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add_default(void)
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{
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add_one("PEOF", "CEOF");
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add_one("CTLESC", "CCTL");
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add_one("CTLVAR", "CCTL");
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add_one("CTLENDVAR", "CCTL");
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add_one("CTLBACKQ", "CCTL");
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add_one("CTLBACKQ + CTLQUOTE", "CCTL");
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add_one("CTLARI", "CCTL");
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add_one("CTLENDARI", "CCTL");
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add_one("CTLQUOTEMARK", "CCTL");
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add_one("CTLQUOTEEND", "CCTL");
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}
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/*
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* Output the footer of a syntax table.
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*/
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static void
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finish(void)
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{
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fputs("};\n", cfile);
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}
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/*
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* Add entries to the syntax table.
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*/
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static void
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add(const char *p, const char *type)
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{
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for (; *p; ++p) {
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char c = *p;
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switch (c) {
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case '\t': c = 't'; break;
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case '\n': c = 'n'; break;
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case '\'': c = '\''; break;
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case '\\': c = '\\'; break;
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default:
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fprintf(cfile, "\t[SYNBASE + '%c'] = %s,\n", c, type);
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continue;
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}
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fprintf(cfile, "\t[SYNBASE + '\\%c'] = %s,\n", c, type);
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}
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}
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/*
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* Output character classification macros (e.g. is_digit). If digits are
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* contiguous, we can test for them quickly.
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*/
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static const char *macro[] = {
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"#define is_digit(c)\t((unsigned int)((c) - '0') <= 9)",
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"#define is_eof(c)\t((c) == PEOF)",
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"#define is_alpha(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER))",
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"#define is_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER))",
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"#define is_in_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))",
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"#define is_special(c)\t((is_type+SYNBASE)[(int)c] & (ISSPECL|ISDIGIT))",
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"#define digit_val(c)\t((c) - '0')",
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NULL
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};
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static void
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output_type_macros(void)
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{
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const char **pp;
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for (pp = macro ; *pp ; pp++)
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fprintf(hfile, "%s\n", *pp);
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}
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