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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#) Copyright (c) 1991, 1993 The Regents of the University of California. All rights reserved. 37 * @(#)mksyntax.c 8.2 (Berkeley) 5/4/95 38 * $FreeBSD: head/bin/sh/mksyntax.c 246522 2013-02-07 22:42:33Z jilles $ 39 */ 40 41 /* 42 * This program creates syntax.h and syntax.c. 43 */ 44 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include "parser.h" 49 50 51 struct synclass { 52 const char *name; 53 const char *comment; 54 }; 55 56 /* Syntax classes */ 57 struct synclass synclass[] = { 58 { "CWORD", "character is nothing special" }, 59 { "CNL", "newline character" }, 60 { "CBACK", "a backslash character" }, 61 { "CSBACK", "a backslash character in single quotes" }, 62 { "CSQUOTE", "single quote" }, 63 { "CDQUOTE", "double quote" }, 64 { "CENDQUOTE", "a terminating quote" }, 65 { "CBQUOTE", "backwards single quote" }, 66 { "CVAR", "a dollar sign" }, 67 { "CENDVAR", "a '}' character" }, 68 { "CLP", "a left paren in arithmetic" }, 69 { "CRP", "a right paren in arithmetic" }, 70 { "CEOF", "end of file" }, 71 { "CCTL", "like CWORD, except it must be escaped" }, 72 { "CSPCL", "these terminate a word" }, 73 { "CIGN", "character should be ignored" }, 74 { NULL, NULL } 75 }; 76 77 78 /* 79 * Syntax classes for is_ functions. Warning: if you add new classes 80 * you may have to change the definition of the is_in_name macro. 81 */ 82 struct synclass is_entry[] = { 83 { "ISDIGIT", "a digit" }, 84 { "ISUPPER", "an upper case letter" }, 85 { "ISLOWER", "a lower case letter" }, 86 { "ISUNDER", "an underscore" }, 87 { "ISSPECL", "the name of a special parameter" }, 88 { NULL, NULL } 89 }; 90 91 static char writer[] = "\ 92 /*\n\ 93 * This file was generated by the mksyntax program.\n\ 94 */\n\ 95 \n"; 96 97 98 static FILE *cfile; 99 static FILE *hfile; 100 101 static void add_default(void); 102 static void finish(void); 103 static void init(const char *); 104 static void add(const char *, const char *); 105 static void output_type_macros(void); 106 107 int 108 main(int argc __unused, char **argv __unused) 109 { 110 int i; 111 char buf[80]; 112 int pos; 113 114 /* Create output files */ 115 if ((cfile = fopen("syntax.c", "w")) == NULL) { 116 perror("syntax.c"); 117 exit(2); 118 } 119 if ((hfile = fopen("syntax.h", "w")) == NULL) { 120 perror("syntax.h"); 121 exit(2); 122 } 123 fputs(writer, hfile); 124 fputs(writer, cfile); 125 126 fputs("#include <sys/cdefs.h>\n", hfile); 127 fputs("#include <limits.h>\n\n", hfile); 128 129 /* Generate the #define statements in the header file */ 130 fputs("/* Syntax classes */\n", hfile); 131 for (i = 0 ; synclass[i].name ; i++) { 132 sprintf(buf, "#define %s %d", synclass[i].name, i); 133 fputs(buf, hfile); 134 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 135 putc('\t', hfile); 136 fprintf(hfile, "/* %s */\n", synclass[i].comment); 137 } 138 putc('\n', hfile); 139 fputs("/* Syntax classes for is_ functions */\n", hfile); 140 for (i = 0 ; is_entry[i].name ; i++) { 141 sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i); 142 fputs(buf, hfile); 143 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 144 putc('\t', hfile); 145 fprintf(hfile, "/* %s */\n", is_entry[i].comment); 146 } 147 putc('\n', hfile); 148 fputs("#define SYNBASE (1 - CHAR_MIN)\n", hfile); 149 fputs("#define PEOF -SYNBASE\n\n", hfile); 150 putc('\n', hfile); 151 fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile); 152 fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile); 153 fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile); 154 fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile); 155 putc('\n', hfile); 156 output_type_macros(); /* is_digit, etc. */ 157 putc('\n', hfile); 158 159 /* Generate the syntax tables. */ 160 fputs("#include \"parser.h\"\n", cfile); 161 fputs("#include \"shell.h\"\n", cfile); 162 fputs("#include \"syntax.h\"\n\n", cfile); 163 164 fputs("/* syntax table used when not in quotes */\n", cfile); 165 init("basesyntax"); 166 add_default(); 167 add("\n", "CNL"); 168 add("\\", "CBACK"); 169 add("'", "CSQUOTE"); 170 add("\"", "CDQUOTE"); 171 add("`", "CBQUOTE"); 172 add("$", "CVAR"); 173 add("}", "CENDVAR"); 174 add("<>();&| \t", "CSPCL"); 175 finish(); 176 177 fputs("\n/* syntax table used when in double quotes */\n", cfile); 178 init("dqsyntax"); 179 add_default(); 180 add("\n", "CNL"); 181 add("\\", "CBACK"); 182 add("\"", "CENDQUOTE"); 183 add("`", "CBQUOTE"); 184 add("$", "CVAR"); 185 add("}", "CENDVAR"); 186 /* ':/' for tilde expansion, '-^]' for [a\-x] pattern ranges */ 187 add("!*?[]=~:/-^", "CCTL"); 188 finish(); 189 190 fputs("\n/* syntax table used when in single quotes */\n", cfile); 191 init("sqsyntax"); 192 add_default(); 193 add("\n", "CNL"); 194 add("\\", "CSBACK"); 195 add("'", "CENDQUOTE"); 196 /* ':/' for tilde expansion, '-^]' for [a\-x] pattern ranges */ 197 add("!*?[]=~:/-^", "CCTL"); 198 finish(); 199 200 fputs("\n/* syntax table used when in arithmetic */\n", cfile); 201 init("arisyntax"); 202 add_default(); 203 add("\n", "CNL"); 204 add("\\", "CBACK"); 205 add("`", "CBQUOTE"); 206 add("\"", "CIGN"); 207 add("$", "CVAR"); 208 add("}", "CENDVAR"); 209 add("(", "CLP"); 210 add(")", "CRP"); 211 finish(); 212 213 fputs("\n/* character classification table */\n", cfile); 214 init("is_type"); 215 add("0123456789", "ISDIGIT"); 216 add("abcdefghijklmnopqrstuvwxyz", "ISLOWER"); 217 add("ABCDEFGHIJKLMNOPQRSTUVWXYZ", "ISUPPER"); 218 add("_", "ISUNDER"); 219 add("#?$!-*@", "ISSPECL"); 220 finish(); 221 222 exit(0); 223 } 224 225 226 /* 227 * Output the header and declaration of a syntax table. 228 */ 229 230 static void 231 init(const char *name) 232 { 233 fprintf(hfile, "extern const char %s[];\n", name); 234 fprintf(cfile, "const char %s[SYNBASE + CHAR_MAX + 1] = {\n", name); 235 } 236 237 238 static void 239 add_one(const char *key, const char *type) 240 { 241 fprintf(cfile, "\t[SYNBASE + %s] = %s,\n", key, type); 242 } 243 244 245 /* 246 * Add default values to the syntax table. 247 */ 248 249 static void 250 add_default(void) 251 { 252 add_one("PEOF", "CEOF"); 253 add_one("CTLESC", "CCTL"); 254 add_one("CTLVAR", "CCTL"); 255 add_one("CTLENDVAR", "CCTL"); 256 add_one("CTLBACKQ", "CCTL"); 257 add_one("CTLBACKQ + CTLQUOTE", "CCTL"); 258 add_one("CTLARI", "CCTL"); 259 add_one("CTLENDARI", "CCTL"); 260 add_one("CTLQUOTEMARK", "CCTL"); 261 add_one("CTLQUOTEEND", "CCTL"); 262 } 263 264 265 /* 266 * Output the footer of a syntax table. 267 */ 268 269 static void 270 finish(void) 271 { 272 fputs("};\n", cfile); 273 } 274 275 276 /* 277 * Add entries to the syntax table. 278 */ 279 280 static void 281 add(const char *p, const char *type) 282 { 283 for (; *p; ++p) { 284 char c = *p; 285 switch (c) { 286 case '\t': c = 't'; break; 287 case '\n': c = 'n'; break; 288 case '\'': c = '\''; break; 289 case '\\': c = '\\'; break; 290 291 default: 292 fprintf(cfile, "\t[SYNBASE + '%c'] = %s,\n", c, type); 293 continue; 294 } 295 fprintf(cfile, "\t[SYNBASE + '\\%c'] = %s,\n", c, type); 296 } 297 } 298 299 300 /* 301 * Output character classification macros (e.g. is_digit). If digits are 302 * contiguous, we can test for them quickly. 303 */ 304 305 static const char *macro[] = { 306 "#define is_digit(c)\t((unsigned int)((c) - '0') <= 9)", 307 "#define is_eof(c)\t((c) == PEOF)", 308 "#define is_alpha(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER))", 309 "#define is_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER))", 310 "#define is_in_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))", 311 "#define is_special(c)\t((is_type+SYNBASE)[(int)c] & (ISSPECL|ISDIGIT))", 312 "#define digit_val(c)\t((c) - '0')", 313 NULL 314 }; 315 316 static void 317 output_type_macros(void) 318 { 319 const char **pp; 320 321 for (pp = macro ; *pp ; pp++) 322 fprintf(hfile, "%s\n", *pp); 323 } 324