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aa9caaf657
merge of parallel duplicate work by Steve Price and myself. :-] There are some changes to the build that are my fault... mkinit.c was trying (poorly) to duplicate some of the work that make(1) is designed to do. The Makefile hackery is my fault too, the depend list was incomplete because of some explicit OBJS+= entries, so mkdep wasn't picking up their source file #includes. This closes a pile of /bin/sh PR's, but not all of them.. Submitted by: Steve Price <steve@bonsai.hiwaay.net>, peter
399 lines
10 KiB
C
399 lines
10 KiB
C
/*-
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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* $Id: mksyntax.c,v 1.5 1996/08/12 22:14:47 ache Exp $
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*/
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#ifndef lint
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static char 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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/*
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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 <string.h>
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#include "parser.h"
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struct synclass {
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char *name;
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char *comment;
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};
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/* Syntax classes */
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struct synclass synclass[] = {
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{ "CWORD", "character is nothing special" },
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{ "CNL", "newline character" },
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{ "CBACK", "a backslash character" },
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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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{ 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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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 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 char *syntax[513];
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static int base;
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static int size; /* number of values which a char variable can have */
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static int nbits; /* number of bits in a character */
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static int digit_contig;/* true if digits are contiguous */
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static void filltable __P((char *));
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static void init __P((void));
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static void add __P((char *, char *));
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static void print __P((char *));
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static void output_type_macros __P((void));
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static void digit_convert __P((void));
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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char c;
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char d;
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int sign;
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int i;
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char buf[80];
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int pos;
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static char digit[] = "0123456789";
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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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/* Determine the characteristics of chars. */
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c = -1;
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if (c < 0)
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sign = 1;
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else
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sign = 0;
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for (nbits = 1 ; ; nbits++) {
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d = (1 << nbits) - 1;
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if (d == c)
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break;
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}
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printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits);
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if (nbits > 9) {
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fputs("Characters can't have more than 9 bits\n", stderr);
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exit(2);
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}
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size = (1 << nbits) + 1;
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base = 1;
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if (sign)
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base += 1 << (nbits - 1);
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digit_contig = 1;
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for (i = 0 ; i < 10 ; i++) {
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if (digit[i] != '0' + i)
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digit_contig = 0;
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}
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fputs("#include <ctype.h>\n", hfile);
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fputs("#include <sys/cdefs.h>\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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fprintf(hfile, "#define SYNBASE %d\n", base);
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fprintf(hfile, "#define PEOF %d\n\n", -base);
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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 \"shell.h\"\n", cfile);
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fputs("#include \"syntax.h\"\n\n", cfile);
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init();
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fputs("/* syntax table used when not in quotes */\n", cfile);
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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("$", "CVAR");
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add("}", "CENDVAR");
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add("<>();&| \t", "CSPCL");
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print("basesyntax");
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init();
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fputs("\n/* syntax table used when in double quotes */\n", cfile);
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add("\n", "CNL");
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add("\\", "CBACK");
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add("\"", "CENDQUOTE");
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add("`", "CBQUOTE");
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add("$", "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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print("dqsyntax");
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init();
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fputs("\n/* syntax table used when in single quotes */\n", cfile);
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add("\n", "CNL");
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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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print("sqsyntax");
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init();
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fputs("\n/* syntax table used when in arithmetic */\n", cfile);
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add("\n", "CNL");
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add("\\", "CBACK");
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add("`", "CBQUOTE");
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add("'", "CSQUOTE");
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add("\"", "CDQUOTE");
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add("$", "CVAR");
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add("}", "CENDVAR");
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add("(", "CLP");
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add(")", "CRP");
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print("arisyntax");
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filltable("0");
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fputs("\n/* character classification table */\n", cfile);
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add("0123456789", "ISDIGIT");
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add("abcdefghijklmnopqrstucvwxyz", "ISLOWER");
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add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER");
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add("_", "ISUNDER");
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add("#?$!-*@", "ISSPECL");
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print("is_type");
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if (! digit_contig)
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digit_convert();
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exit(0);
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}
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/*
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* Clear the syntax table.
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*/
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static void
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filltable(dftval)
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char *dftval;
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{
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int i;
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for (i = 0 ; i < size ; i++)
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syntax[i] = dftval;
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}
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/*
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* Initialize the syntax table with default values.
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*/
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static void
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init()
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{
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filltable("CWORD");
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syntax[0] = "CEOF";
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syntax[base + CTLESC] = "CCTL";
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syntax[base + CTLVAR] = "CCTL";
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syntax[base + CTLENDVAR] = "CCTL";
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syntax[base + CTLBACKQ] = "CCTL";
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syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL";
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syntax[base + CTLARI] = "CCTL";
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syntax[base + CTLENDARI] = "CCTL";
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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(p, type)
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char *p, *type;
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{
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while (*p)
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syntax[*p++ + base] = type;
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}
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/*
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* Output the syntax table.
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*/
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static void
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print(name)
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char *name;
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{
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int i;
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int col;
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fprintf(hfile, "extern const char %s[];\n", name);
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fprintf(cfile, "const char %s[%d] = {\n", name, size);
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col = 0;
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for (i = 0 ; i < size ; i++) {
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if (i == 0) {
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fputs(" ", cfile);
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} else if ((i & 03) == 0) {
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fputs(",\n ", cfile);
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col = 0;
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} else {
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putc(',', cfile);
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while (++col < 9 * (i & 03))
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putc(' ', cfile);
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}
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fputs(syntax[i], cfile);
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col += strlen(syntax[i]);
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}
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fputs("\n};\n", cfile);
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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 char *macro[] = {
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"#define is_digit(c)\t((is_type+SYNBASE)[c] & ISDIGIT)",
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"#define is_alpha(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLENDARI) && isalpha((unsigned char) (c)))",
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"#define is_name(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalpha((unsigned char) (c))))",
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"#define is_in_name(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalnum((unsigned char) (c))))",
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"#define is_special(c)\t((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))",
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NULL
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};
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static void
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output_type_macros()
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{
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char **pp;
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if (digit_contig)
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macro[0] = "#define is_digit(c)\t((unsigned)((c) - '0') <= 9)";
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for (pp = macro ; *pp ; pp++)
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fprintf(hfile, "%s\n", *pp);
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if (digit_contig)
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fputs("#define digit_val(c)\t((c) - '0')\n", hfile);
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else
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fputs("#define digit_val(c)\t(digit_value[c])\n", hfile);
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}
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/*
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* Output digit conversion table (if digits are not contiguous).
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*/
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static void
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digit_convert()
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{
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int maxdigit;
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static char digit[] = "0123456789";
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char *p;
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int i;
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maxdigit = 0;
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for (p = digit ; *p ; p++)
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if (*p > maxdigit)
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maxdigit = *p;
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fputs("extern const char digit_value[];\n", hfile);
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fputs("\n\nconst char digit_value[] = {\n", cfile);
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for (i = 0 ; i <= maxdigit ; i++) {
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for (p = digit ; *p && *p != i ; p++);
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if (*p == '\0')
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p = digit;
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fprintf(cfile, " %d,\n", p - digit);
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}
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fputs("};\n", cfile);
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}
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