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