mksyntax.c revision 247058
1/*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Kenneth Almquist. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#if 0 34#ifndef lint 35static char const copyright[] = 36"@(#) Copyright (c) 1991, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38#endif /* not lint */ 39 40#ifndef lint 41static char sccsid[] = "@(#)mksyntax.c 8.2 (Berkeley) 5/4/95"; 42#endif /* not lint */ 43#endif 44#include <sys/cdefs.h> 45__FBSDID("$FreeBSD: stable/9/bin/sh/mksyntax.c 247058 2013-02-20 21:57:01Z jilles $"); 46 47/* 48 * This program creates syntax.h and syntax.c. 49 */ 50 51#include <stdio.h> 52#include <stdlib.h> 53#include <string.h> 54#include "parser.h" 55 56 57struct synclass { 58 const char *name; 59 const char *comment; 60}; 61 62/* Syntax classes */ 63struct synclass synclass[] = { 64 { "CWORD", "character is nothing special" }, 65 { "CNL", "newline character" }, 66 { "CBACK", "a backslash character" }, 67 { "CSBACK", "a backslash character in single quotes" }, 68 { "CSQUOTE", "single quote" }, 69 { "CDQUOTE", "double quote" }, 70 { "CENDQUOTE", "a terminating quote" }, 71 { "CBQUOTE", "backwards single quote" }, 72 { "CVAR", "a dollar sign" }, 73 { "CENDVAR", "a '}' character" }, 74 { "CLP", "a left paren in arithmetic" }, 75 { "CRP", "a right paren in arithmetic" }, 76 { "CEOF", "end of file" }, 77 { "CCTL", "like CWORD, except it must be escaped" }, 78 { "CSPCL", "these terminate a word" }, 79 { "CIGN", "character should be ignored" }, 80 { NULL, NULL } 81}; 82 83 84/* 85 * Syntax classes for is_ functions. Warning: if you add new classes 86 * you may have to change the definition of the is_in_name macro. 87 */ 88struct synclass is_entry[] = { 89 { "ISDIGIT", "a digit" }, 90 { "ISUPPER", "an upper case letter" }, 91 { "ISLOWER", "a lower case letter" }, 92 { "ISUNDER", "an underscore" }, 93 { "ISSPECL", "the name of a special parameter" }, 94 { NULL, NULL } 95}; 96 97static char writer[] = "\ 98/*\n\ 99 * This file was generated by the mksyntax program.\n\ 100 */\n\ 101\n"; 102 103 104static FILE *cfile; 105static FILE *hfile; 106static const char *syntax[513]; 107static int base; 108static int size; /* number of values which a char variable can have */ 109static int nbits; /* number of bits in a character */ 110 111static void filltable(const char *); 112static void init(void); 113static void add(const char *, const char *); 114static void print(const char *); 115static void output_type_macros(void); 116 117int 118main(int argc __unused, char **argv __unused) 119{ 120 char c; 121 char d; 122 int sign; 123 int i; 124 char buf[80]; 125 int pos; 126 127 /* Create output files */ 128 if ((cfile = fopen("syntax.c", "w")) == NULL) { 129 perror("syntax.c"); 130 exit(2); 131 } 132 if ((hfile = fopen("syntax.h", "w")) == NULL) { 133 perror("syntax.h"); 134 exit(2); 135 } 136 fputs(writer, hfile); 137 fputs(writer, cfile); 138 139 /* Determine the characteristics of chars. */ 140 c = -1; 141 sign = (c > 0) ? 0 : 1; 142 for (nbits = 1 ; ; nbits++) { 143 d = (1 << nbits) - 1; 144 if (d == c) 145 break; 146 } 147#if 0 148 printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits); 149#endif 150 if (nbits > 9) { 151 fputs("Characters can't have more than 9 bits\n", stderr); 152 exit(2); 153 } 154 size = (1 << nbits) + 1; 155 base = 1; 156 if (sign) 157 base += 1 << (nbits - 1); 158 159 fputs("#include <sys/cdefs.h>\n", hfile); 160 fputs("#include <ctype.h>\n", hfile); 161 162 /* Generate the #define statements in the header file */ 163 fputs("/* Syntax classes */\n", hfile); 164 for (i = 0 ; synclass[i].name ; i++) { 165 sprintf(buf, "#define %s %d", synclass[i].name, i); 166 fputs(buf, hfile); 167 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 168 putc('\t', hfile); 169 fprintf(hfile, "/* %s */\n", synclass[i].comment); 170 } 171 putc('\n', hfile); 172 fputs("/* Syntax classes for is_ functions */\n", hfile); 173 for (i = 0 ; is_entry[i].name ; i++) { 174 sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i); 175 fputs(buf, hfile); 176 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 177 putc('\t', hfile); 178 fprintf(hfile, "/* %s */\n", is_entry[i].comment); 179 } 180 putc('\n', hfile); 181 fprintf(hfile, "#define SYNBASE %d\n", base); 182 fprintf(hfile, "#define PEOF %d\n\n", -base); 183 putc('\n', hfile); 184 fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile); 185 fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile); 186 fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile); 187 fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile); 188 putc('\n', hfile); 189 output_type_macros(); /* is_digit, etc. */ 190 putc('\n', hfile); 191 192 /* Generate the syntax tables. */ 193 fputs("#include \"shell.h\"\n", cfile); 194 fputs("#include \"syntax.h\"\n\n", cfile); 195 init(); 196 fputs("/* syntax table used when not in quotes */\n", cfile); 197 add("\n", "CNL"); 198 add("\\", "CBACK"); 199 add("'", "CSQUOTE"); 200 add("\"", "CDQUOTE"); 201 add("`", "CBQUOTE"); 202 add("$", "CVAR"); 203 add("}", "CENDVAR"); 204 add("<>();&| \t", "CSPCL"); 205 print("basesyntax"); 206 init(); 207 fputs("\n/* syntax table used when in double quotes */\n", cfile); 208 add("\n", "CNL"); 209 add("\\", "CBACK"); 210 add("\"", "CENDQUOTE"); 211 add("`", "CBQUOTE"); 212 add("$", "CVAR"); 213 add("}", "CENDVAR"); 214 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 215 add("!*?[=~:/-", "CCTL"); 216 print("dqsyntax"); 217 init(); 218 fputs("\n/* syntax table used when in single quotes */\n", cfile); 219 add("\n", "CNL"); 220 add("\\", "CSBACK"); 221 add("'", "CENDQUOTE"); 222 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 223 add("!*?[=~:/-", "CCTL"); 224 print("sqsyntax"); 225 init(); 226 fputs("\n/* syntax table used when in arithmetic */\n", cfile); 227 add("\n", "CNL"); 228 add("\\", "CBACK"); 229 add("`", "CBQUOTE"); 230 add("\"", "CIGN"); 231 add("$", "CVAR"); 232 add("}", "CENDVAR"); 233 add("(", "CLP"); 234 add(")", "CRP"); 235 print("arisyntax"); 236 filltable("0"); 237 fputs("\n/* character classification table */\n", cfile); 238 add("0123456789", "ISDIGIT"); 239 add("abcdefghijklmnopqrstuvwxyz", "ISLOWER"); 240 add("ABCDEFGHIJKLMNOPQRSTUVWXYZ", "ISUPPER"); 241 add("_", "ISUNDER"); 242 add("#?$!-*@", "ISSPECL"); 243 print("is_type"); 244 exit(0); 245} 246 247 248 249/* 250 * Clear the syntax table. 251 */ 252 253static void 254filltable(const char *dftval) 255{ 256 int i; 257 258 for (i = 0 ; i < size ; i++) 259 syntax[i] = dftval; 260} 261 262 263/* 264 * Initialize the syntax table with default values. 265 */ 266 267static void 268init(void) 269{ 270 filltable("CWORD"); 271 syntax[0] = "CEOF"; 272 syntax[base + CTLESC] = "CCTL"; 273 syntax[base + CTLVAR] = "CCTL"; 274 syntax[base + CTLENDVAR] = "CCTL"; 275 syntax[base + CTLBACKQ] = "CCTL"; 276 syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL"; 277 syntax[base + CTLARI] = "CCTL"; 278 syntax[base + CTLENDARI] = "CCTL"; 279 syntax[base + CTLQUOTEMARK] = "CCTL"; 280 syntax[base + CTLQUOTEEND] = "CCTL"; 281} 282 283 284/* 285 * Add entries to the syntax table. 286 */ 287 288static void 289add(const char *p, const char *type) 290{ 291 while (*p) 292 syntax[*p++ + base] = type; 293} 294 295 296 297/* 298 * Output the syntax table. 299 */ 300 301static void 302print(const char *name) 303{ 304 int i; 305 int col; 306 307 fprintf(hfile, "extern const char %s[];\n", name); 308 fprintf(cfile, "const char %s[%d] = {\n", name, size); 309 col = 0; 310 for (i = 0 ; i < size ; i++) { 311 if (i == 0) { 312 fputs(" ", cfile); 313 } else if ((i & 03) == 0) { 314 fputs(",\n ", cfile); 315 col = 0; 316 } else { 317 putc(',', cfile); 318 while (++col < 9 * (i & 03)) 319 putc(' ', cfile); 320 } 321 fputs(syntax[i], cfile); 322 col += strlen(syntax[i]); 323 } 324 fputs("\n};\n", cfile); 325} 326 327 328 329/* 330 * Output character classification macros (e.g. is_digit). If digits are 331 * contiguous, we can test for them quickly. 332 */ 333 334static const char *macro[] = { 335 "#define is_digit(c)\t((unsigned int)((c) - '0') <= 9)", 336 "#define is_eof(c)\t((c) == PEOF)", 337 "#define is_alpha(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER))", 338 "#define is_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER))", 339 "#define is_in_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))", 340 "#define is_special(c)\t((is_type+SYNBASE)[(int)c] & (ISSPECL|ISDIGIT))", 341 "#define digit_val(c)\t((c) - '0')", 342 NULL 343}; 344 345static void 346output_type_macros(void) 347{ 348 const char **pp; 349 350 for (pp = macro ; *pp ; pp++) 351 fprintf(hfile, "%s\n", *pp); 352} 353