| 1 | /* $NetBSD: mksyntax.c,v 1.23 2000/07/18 19:13:21 cgd Exp $ */
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| 2 |
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| 3 | /*-
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| 4 | * Copyright (c) 1991, 1993
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| 5 | * The Regents of the University of California. All rights reserved.
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| 6 | *
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| 7 | * This code is derived from software contributed to Berkeley by
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| 8 | * Kenneth Almquist.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without
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| 11 | * modification, are permitted provided that the following conditions
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| 12 | * are met:
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright
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| 16 | * notice, this list of conditions and the following disclaimer in the
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| 17 | * documentation and/or other materials provided with the distribution.
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| 18 | * 3. All advertising materials mentioning features or use of this software
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| 19 | * must display the following acknowledgement:
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| 20 | * This product includes software developed by the University of
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| 21 | * California, Berkeley and its contributors.
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| 22 | * 4. Neither the name of the University nor the names of its contributors
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| 23 | * may be used to endorse or promote products derived from this software
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| 24 | * without specific prior written permission.
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| 25 | *
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| 26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 36 | * SUCH DAMAGE.
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| 37 | */
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| 38 |
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| 39 | #ifndef lint
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| 40 | static const char copyright[] =
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| 41 | "@(#) Copyright (c) 1991, 1993\n\
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| 42 | The Regents of the University of California. All rights reserved.\n";
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| 43 | #endif /* not lint */
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| 44 |
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| 45 | #ifndef lint
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| 46 | #if 0
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| 47 | static char sccsid[] = "@(#)mksyntax.c 8.2 (Berkeley) 5/4/95";
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| 48 | #else
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| 49 | static const char rcsid[] =
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| 50 | "$NetBSD: mksyntax.c,v 1.23 2000/07/18 19:13:21 cgd Exp $";
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| 51 | #endif
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| 52 | #endif /* not lint */
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| 53 |
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| 54 | /*
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| 55 | * This program creates syntax.h and syntax.c.
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| 56 | */
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| 57 |
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| 58 | #include <stdio.h>
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| 59 | #include <stdlib.h>
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| 60 | #include <string.h>
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| 61 | #include <sys/types.h>
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| 62 | #include "../parser.h"
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| 63 |
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| 64 |
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| 65 | struct synclass {
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| 66 | char *name;
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| 67 | char *comment;
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| 68 | };
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| 69 |
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| 70 | /* Syntax classes */
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| 71 | struct synclass synclass[] = {
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| 72 | { "CWORD", "character is nothing special" },
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| 73 | { "CNL", "newline character" },
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| 74 | { "CBACK", "a backslash character" },
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| 75 | { "CSQUOTE", "single quote" },
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| 76 | { "CDQUOTE", "double quote" },
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| 77 | { "CENDQUOTE", "a terminating quote" },
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| 78 | { "CBQUOTE", "backwards single quote" },
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| 79 | { "CVAR", "a dollar sign" },
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| 80 | { "CENDVAR", "a '}' character" },
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| 81 | { "CLP", "a left paren in arithmetic" },
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| 82 | { "CRP", "a right paren in arithmetic" },
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| 83 | { "CEOF", "end of file" },
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| 84 | { "CCTL", "like CWORD, except it must be escaped" },
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| 85 | { "CSPCL", "these terminate a word" },
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| 86 | { NULL, NULL }
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| 87 | };
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| 88 |
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| 89 |
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| 90 | /*
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| 91 | * Syntax classes for is_ functions. Warning: if you add new classes
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| 92 | * you may have to change the definition of the is_in_name macro.
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| 93 | */
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| 94 | struct synclass is_entry[] = {
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| 95 | { "ISDIGIT", "a digit" },
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| 96 | { "ISUPPER", "an upper case letter" },
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| 97 | { "ISLOWER", "a lower case letter" },
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| 98 | { "ISUNDER", "an underscore" },
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| 99 | { "ISSPECL", "the name of a special parameter" },
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| 100 | { NULL, NULL }
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| 101 | };
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| 102 |
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| 103 | static char writer[] = "\
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| 104 | /*\n\
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| 105 | * This file was generated by the mksyntax program.\n\
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| 106 | */\n\
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| 107 | \n";
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| 108 |
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| 109 |
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| 110 | static FILE *cfile;
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| 111 | static FILE *hfile;
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| 112 | static char *syntax[513];
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| 113 | static int base;
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| 114 | static int size; /* number of values which a char variable can have */
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| 115 | static int nbits; /* number of bits in a character */
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| 116 | static int digit_contig;/* true if digits are contiguous */
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| 117 |
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| 118 | static void filltable(char *);
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| 119 | static void init(void);
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| 120 | static void add(char *, char *);
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| 121 | static void print(char *);
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| 122 | static void output_type_macros(void);
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| 123 | static void digit_convert(void);
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| 124 | int main(int, char **);
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| 125 |
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| 126 | int
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| 127 | main(argc, argv)
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| 128 | int argc;
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| 129 | char **argv;
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| 130 | {
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| 131 | #ifdef TARGET_CHAR
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| 132 | TARGET_CHAR c;
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| 133 | TARGET_CHAR d;
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| 134 | #else
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| 135 | char c;
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| 136 | char d;
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| 137 | #endif
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| 138 | int sign;
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| 139 | int i;
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| 140 | char buf[80];
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| 141 | int pos;
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| 142 | static char digit[] = "0123456789";
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| 143 |
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| 144 | /* Create output files */
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| 145 | if ((cfile = fopen("syntax.c", "w")) == NULL) {
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| 146 | perror("syntax.c");
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| 147 | exit(2);
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| 148 | }
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| 149 | if ((hfile = fopen("syntax.h", "w")) == NULL) {
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| 150 | perror("syntax.h");
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| 151 | exit(2);
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| 152 | }
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| 153 | fputs(writer, hfile);
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| 154 | fputs(writer, cfile);
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| 155 |
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| 156 | /* Determine the characteristics of chars. */
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| 157 | c = -1;
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| 158 | if (c <= 0)
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| 159 | sign = 1;
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| 160 | else
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| 161 | sign = 0;
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| 162 | for (nbits = 1 ; ; nbits++) {
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| 163 | d = (1 << nbits) - 1;
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| 164 | if (d == c)
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| 165 | break;
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| 166 | }
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| 167 | printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits);
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| 168 | if (nbits > 9) {
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| 169 | fputs("Characters can't have more than 9 bits\n", stderr);
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| 170 | exit(2);
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| 171 | }
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| 172 | size = (1 << nbits) + 1;
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| 173 | base = 1;
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| 174 | if (sign)
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| 175 | base += 1 << (nbits - 1);
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| 176 | digit_contig = 1;
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| 177 | for (i = 0 ; i < 10 ; i++) {
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| 178 | if (digit[i] != '0' + i)
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| 179 | digit_contig = 0;
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| 180 | }
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| 181 |
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| 182 | fputs("#include <sys/cdefs.h>\n", hfile);
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| 183 | fputs("#include <ctype.h>\n", hfile);
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| 184 |
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| 185 | /* Generate the #define statements in the header file */
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| 186 | fputs("/* Syntax classes */\n", hfile);
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| 187 | for (i = 0 ; synclass[i].name ; i++) {
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| 188 | sprintf(buf, "#define %s %d", synclass[i].name, i);
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| 189 | fputs(buf, hfile);
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| 190 | for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
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| 191 | putc('\t', hfile);
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| 192 | fprintf(hfile, "/* %s */\n", synclass[i].comment);
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| 193 | }
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| 194 | putc('\n', hfile);
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| 195 | fputs("/* Syntax classes for is_ functions */\n", hfile);
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| 196 | for (i = 0 ; is_entry[i].name ; i++) {
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| 197 | sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i);
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| 198 | fputs(buf, hfile);
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| 199 | for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
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| 200 | putc('\t', hfile);
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| 201 | fprintf(hfile, "/* %s */\n", is_entry[i].comment);
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| 202 | }
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| 203 | putc('\n', hfile);
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| 204 | fprintf(hfile, "#define SYNBASE %d\n", base);
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| 205 | fprintf(hfile, "#define PEOF %d\n\n", -base);
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| 206 | if (sign)
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| 207 | fprintf(hfile, "#define UPEOF %d\n\n", -base);
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| 208 | else
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| 209 | fprintf(hfile, "#define UPEOF ((unsigned char) %d)\n\n", -base);
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| 210 | putc('\n', hfile);
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| 211 | fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile);
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| 212 | fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile);
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| 213 | fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile);
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| 214 | fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile);
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| 215 | putc('\n', hfile);
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| 216 | output_type_macros(); /* is_digit, etc. */
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| 217 | putc('\n', hfile);
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| 218 |
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| 219 | /* Generate the syntax tables. */
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| 220 | fputs("#include \"shell.h\"\n", cfile);
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| 221 | fputs("#include \"syntax.h\"\n\n", cfile);
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| 222 | init();
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| 223 | fputs("/* syntax table used when not in quotes */\n", cfile);
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| 224 | add("\n", "CNL");
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| 225 | add("\\", "CBACK");
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| 226 | add("'", "CSQUOTE");
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| 227 | add("\"", "CDQUOTE");
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| 228 | add("`", "CBQUOTE");
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| 229 | add("$", "CVAR");
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| 230 | add("}", "CENDVAR");
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| 231 | add("<>();&| \t", "CSPCL");
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| 232 | print("basesyntax");
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| 233 | init();
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| 234 | fputs("\n/* syntax table used when in double quotes */\n", cfile);
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| 235 | add("\n", "CNL");
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| 236 | add("\\", "CBACK");
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| 237 | add("\"", "CENDQUOTE");
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| 238 | add("`", "CBQUOTE");
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| 239 | add("$", "CVAR");
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| 240 | add("}", "CENDVAR");
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| 241 | /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
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| 242 | add("!*?[=~:/-]", "CCTL");
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| 243 | print("dqsyntax");
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| 244 | init();
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| 245 | fputs("\n/* syntax table used when in single quotes */\n", cfile);
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| 246 | add("\n", "CNL");
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| 247 | add("'", "CENDQUOTE");
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| 248 | /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
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| 249 | add("!*?[=~:/-]\\", "CCTL");
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| 250 | print("sqsyntax");
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| 251 | init();
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| 252 | fputs("\n/* syntax table used when in arithmetic */\n", cfile);
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| 253 | add("\n", "CNL");
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| 254 | add("\\", "CBACK");
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| 255 | add("`", "CBQUOTE");
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| 256 | add("'", "CSQUOTE");
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| 257 | add("\"", "CDQUOTE");
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| 258 | add("$", "CVAR");
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| 259 | add("}", "CENDVAR");
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| 260 | add("(", "CLP");
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| 261 | add(")", "CRP");
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| 262 | print("arisyntax");
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| 263 | filltable("0");
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| 264 | fputs("\n/* character classification table */\n", cfile);
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| 265 | add("0123456789", "ISDIGIT");
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| 266 | add("abcdefghijklmnopqrstucvwxyz", "ISLOWER");
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| 267 | add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER");
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| 268 | add("_", "ISUNDER");
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| 269 | add("#?$!-*@", "ISSPECL");
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| 270 | print("is_type");
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| 271 | if (! digit_contig)
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| 272 | digit_convert();
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| 273 | exit(0);
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| 274 | /* NOTREACHED */
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| 275 | }
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| 276 |
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| 277 |
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| 278 |
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| 279 | /*
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| 280 | * Clear the syntax table.
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| 281 | */
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| 282 |
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| 283 | static void
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| 284 | filltable(dftval)
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| 285 | char *dftval;
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| 286 | {
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| 287 | int i;
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| 288 |
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| 289 | for (i = 0 ; i < size ; i++)
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| 290 | syntax[i] = dftval;
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| 291 | }
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| 292 |
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| 293 |
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| 294 | /*
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| 295 | * Initialize the syntax table with default values.
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| 296 | */
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| 297 |
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| 298 | static void
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| 299 | init()
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| 300 | {
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| 301 | filltable("CWORD");
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| 302 | syntax[0] = "CEOF";
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| 303 | #ifdef TARGET_CHAR
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| 304 | syntax[base + (TARGET_CHAR)CTLESC] = "CCTL";
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| 305 | syntax[base + (TARGET_CHAR)CTLVAR] = "CCTL";
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| 306 | syntax[base + (TARGET_CHAR)CTLENDVAR] = "CCTL";
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| 307 | syntax[base + (TARGET_CHAR)CTLBACKQ] = "CCTL";
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| 308 | syntax[base + (TARGET_CHAR)CTLBACKQ + (TARGET_CHAR)CTLQUOTE] = "CCTL";
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| 309 | syntax[base + (TARGET_CHAR)CTLARI] = "CCTL";
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| 310 | syntax[base + (TARGET_CHAR)CTLENDARI] = "CCTL";
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| 311 | syntax[base + (TARGET_CHAR)CTLQUOTEMARK] = "CCTL";
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| 312 | #else
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| 313 | syntax[base + CTLESC] = "CCTL";
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| 314 | syntax[base + CTLVAR] = "CCTL";
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| 315 | syntax[base + CTLENDVAR] = "CCTL";
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| 316 | syntax[base + CTLBACKQ] = "CCTL";
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| 317 | syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL";
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| 318 | syntax[base + CTLARI] = "CCTL";
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| 319 | syntax[base + CTLENDARI] = "CCTL";
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| 320 | syntax[base + CTLQUOTEMARK] = "CCTL";
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| 321 | #endif /* TARGET_CHAR */
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| 322 | }
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| 323 |
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| 324 |
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| 325 | /*
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| 326 | * Add entries to the syntax table.
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| 327 | */
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| 328 |
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| 329 | static void
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| 330 | add(p, type)
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| 331 | char *p, *type;
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| 332 | {
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| 333 | while (*p)
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| 334 | syntax[*p++ + base] = type;
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| 335 | }
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| 336 |
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| 337 |
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| 338 |
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| 339 | /*
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| 340 | * Output the syntax table.
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| 341 | */
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| 342 |
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| 343 | static void
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| 344 | print(name)
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| 345 | char *name;
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| 346 | {
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| 347 | int i;
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| 348 | int col;
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| 349 |
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| 350 | fprintf(hfile, "extern const char %s[];\n", name);
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| 351 | fprintf(cfile, "const char %s[%d] = {\n", name, size);
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| 352 | col = 0;
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| 353 | for (i = 0 ; i < size ; i++) {
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| 354 | if (i == 0) {
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| 355 | fputs(" ", cfile);
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| 356 | } else if ((i & 03) == 0) {
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| 357 | fputs(",\n ", cfile);
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| 358 | col = 0;
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| 359 | } else {
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| 360 | putc(',', cfile);
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| 361 | while (++col < 9 * (i & 03))
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| 362 | putc(' ', cfile);
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| 363 | }
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| 364 | fputs(syntax[i], cfile);
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| 365 | col += strlen(syntax[i]);
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| 366 | }
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| 367 | fputs("\n};\n", cfile);
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| 368 | }
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| 369 |
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| 370 |
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| 371 |
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| 372 | /*
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| 373 | * Output character classification macros (e.g. is_digit). If digits are
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| 374 | * contiguous, we can test for them quickly.
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| 375 | */
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| 376 |
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| 377 | static char *macro[] = {
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| 378 | "#define is_digit(c)\t((is_type+SYNBASE)[c] & ISDIGIT)",
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| 379 | "#define is_alpha(c)\t((c) != UPEOF && ((c) < CTLESC || (c) > CTLENDARI) && isalpha((unsigned char) (c)))",
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| 380 | "#define is_name(c)\t((c) != UPEOF && ((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalpha((unsigned char) (c))))",
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| 381 | "#define is_in_name(c)\t((c) != UPEOF && ((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalnum((unsigned char) (c))))",
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| 382 | "#define is_special(c)\t((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))",
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| 383 | NULL
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| 384 | };
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| 385 |
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| 386 | static void
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| 387 | output_type_macros()
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| 388 | {
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| 389 | char **pp;
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| 390 |
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| 391 | if (digit_contig)
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| 392 | macro[0] = "#define is_digit(c)\t((unsigned)((c) - '0') <= 9)";
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| 393 | for (pp = macro ; *pp ; pp++)
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| 394 | fprintf(hfile, "%s\n", *pp);
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| 395 | if (digit_contig)
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| 396 | fputs("#define digit_val(c)\t((c) - '0')\n", hfile);
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| 397 | else
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| 398 | fputs("#define digit_val(c)\t(digit_value[c])\n", hfile);
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| 399 | }
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| 400 |
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| 401 |
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| 402 |
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| 403 | /*
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| 404 | * Output digit conversion table (if digits are not contiguous).
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| 405 | */
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| 406 |
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| 407 | static void
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| 408 | digit_convert()
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| 409 | {
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| 410 | int maxdigit;
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| 411 | static char digit[] = "0123456789";
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| 412 | char *p;
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| 413 | int i;
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| 414 |
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| 415 | maxdigit = 0;
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| 416 | for (p = digit ; *p ; p++)
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| 417 | if (*p > maxdigit)
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| 418 | maxdigit = *p;
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| 419 | fputs("extern const char digit_value[];\n", hfile);
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| 420 | fputs("\n\nconst char digit_value[] = {\n", cfile);
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| 421 | for (i = 0 ; i <= maxdigit ; i++) {
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| 422 | for (p = digit ; *p && *p != i ; p++);
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| 423 | if (*p == '\0')
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| 424 | p = digit;
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| 425 | fprintf(cfile, " %ld,\n", (long)(p - digit));
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| 426 | }
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| 427 | fputs("};\n", cfile);
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| 428 | }
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