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. 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 * @(#) Copyright (c) 1991, 1993 The Regents of the University of California. All rights reserved. 33 * @(#)mksyntax.c 8.2 (Berkeley) 5/4/95 34 * $FreeBSD: head/bin/sh/mksyntax.c 246522 2013-02-07 22:42:33Z jilles $ 35 */ 36 37 /* 38 * This program creates syntax.h and syntax.c. 39 */ 40 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include "parser.h" 45 46 47 struct synclass { 48 const char *name; 49 const char *comment; 50 }; 51 52 /* Syntax classes */ 53 struct synclass synclass[] = { 54 { "CWORD", "character is nothing special" }, 55 { "CNL", "newline character" }, 56 { "CBACK", "a backslash character" }, 57 { "CSBACK", "a backslash character in single quotes" }, 58 { "CSQUOTE", "single quote" }, 59 { "CDQUOTE", "double quote" }, 60 { "CENDQUOTE", "a terminating quote" }, 61 { "CBQUOTE", "backwards single quote" }, 62 { "CVAR", "a dollar sign" }, 63 { "CENDVAR", "a '}' character" }, 64 { "CLP", "a left paren in arithmetic" }, 65 { "CRP", "a right paren in arithmetic" }, 66 { "CEOF", "end of file" }, 67 { "CCTL", "like CWORD, except it must be escaped" }, 68 { "CSPCL", "these terminate a word" }, 69 { "CIGN", "character should be ignored" }, 70 { NULL, NULL } 71 }; 72 73 74 /* 75 * Syntax classes for is_ functions. Warning: if you add new classes 76 * you may have to change the definition of the is_in_name macro. 77 */ 78 struct synclass is_entry[] = { 79 { "ISDIGIT", "a digit" }, 80 { "ISUPPER", "an upper case letter" }, 81 { "ISLOWER", "a lower case letter" }, 82 { "ISUNDER", "an underscore" }, 83 { "ISSPECL", "the name of a special parameter" }, 84 { NULL, NULL } 85 }; 86 87 static char writer[] = "\ 88 /*\n\ 89 * This file was generated by the mksyntax program.\n\ 90 */\n\ 91 \n"; 92 93 94 static FILE *cfile; 95 static FILE *hfile; 96 97 static void add_default(void); 98 static void finish(void); 99 static void init(const char *); 100 static void add(const char *, const char *); 101 static void output_type_macros(void); 102 103 int 104 main(int argc __unused, char **argv __unused) 105 { 106 int i; 107 char buf[80]; 108 int pos; 109 110 /* Create output files */ 111 if ((cfile = fopen("syntax.c", "w")) == NULL) { 112 perror("syntax.c"); 113 exit(2); 114 } 115 if ((hfile = fopen("syntax.h", "w")) == NULL) { 116 perror("syntax.h"); 117 exit(2); 118 } 119 fputs(writer, hfile); 120 fputs(writer, cfile); 121 122 fputs("#include <sys/cdefs.h>\n", hfile); 123 fputs("#include <limits.h>\n\n", hfile); 124 125 /* Generate the #define statements in the header file */ 126 fputs("/* Syntax classes */\n", hfile); 127 for (i = 0 ; synclass[i].name ; i++) { 128 sprintf(buf, "#define %s %d", synclass[i].name, i); 129 fputs(buf, hfile); 130 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 131 putc('\t', hfile); 132 fprintf(hfile, "/* %s */\n", synclass[i].comment); 133 } 134 putc('\n', hfile); 135 fputs("/* Syntax classes for is_ functions */\n", hfile); 136 for (i = 0 ; is_entry[i].name ; i++) { 137 sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i); 138 fputs(buf, hfile); 139 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 140 putc('\t', hfile); 141 fprintf(hfile, "/* %s */\n", is_entry[i].comment); 142 } 143 putc('\n', hfile); 144 fputs("#define SYNBASE (1 - CHAR_MIN)\n", hfile); 145 fputs("#define PEOF -SYNBASE\n\n", hfile); 146 putc('\n', hfile); 147 fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile); 148 fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile); 149 fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile); 150 fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile); 151 putc('\n', hfile); 152 output_type_macros(); /* is_digit, etc. */ 153 putc('\n', hfile); 154 155 /* Generate the syntax tables. */ 156 fputs("#include \"parser.h\"\n", cfile); 157 fputs("#include \"shell.h\"\n", cfile); 158 fputs("#include \"syntax.h\"\n\n", cfile); 159 160 fputs("/* syntax table used when not in quotes */\n", cfile); 161 init("basesyntax"); 162 add_default(); 163 add("\n", "CNL"); 164 add("\\", "CBACK"); 165 add("'", "CSQUOTE"); 166 add("\"", "CDQUOTE"); 167 add("`", "CBQUOTE"); 168 add("$", "CVAR"); 169 add("}", "CENDVAR"); 170 add("<>();&| \t", "CSPCL"); 171 finish(); 172 173 fputs("\n/* syntax table used when in double quotes */\n", cfile); 174 init("dqsyntax"); 175 add_default(); 176 add("\n", "CNL"); 177 add("\\", "CBACK"); 178 add("\"", "CENDQUOTE"); 179 add("`", "CBQUOTE"); 180 add("$", "CVAR"); 181 add("}", "CENDVAR"); 182 /* ':/' for tilde expansion, '-^]' for [a\-x] pattern ranges */ 183 add("!*?[]=~:/-^", "CCTL"); 184 finish(); 185 186 fputs("\n/* syntax table used when in single quotes */\n", cfile); 187 init("sqsyntax"); 188 add_default(); 189 add("\n", "CNL"); 190 add("\\", "CSBACK"); 191 add("'", "CENDQUOTE"); 192 /* ':/' for tilde expansion, '-^]' for [a\-x] pattern ranges */ 193 add("!*?[]=~:/-^", "CCTL"); 194 finish(); 195 196 fputs("\n/* syntax table used when in arithmetic */\n", cfile); 197 init("arisyntax"); 198 add_default(); 199 add("\n", "CNL"); 200 add("\\", "CBACK"); 201 add("`", "CBQUOTE"); 202 add("\"", "CIGN"); 203 add("$", "CVAR"); 204 add("}", "CENDVAR"); 205 add("(", "CLP"); 206 add(")", "CRP"); 207 finish(); 208 209 fputs("\n/* character classification table */\n", cfile); 210 init("is_type"); 211 add("0123456789", "ISDIGIT"); 212 add("abcdefghijklmnopqrstuvwxyz", "ISLOWER"); 213 add("ABCDEFGHIJKLMNOPQRSTUVWXYZ", "ISUPPER"); 214 add("_", "ISUNDER"); 215 add("#?$!-*@", "ISSPECL"); 216 finish(); 217 218 exit(0); 219 } 220 221 222 /* 223 * Output the header and declaration of a syntax table. 224 */ 225 226 static void 227 init(const char *name) 228 { 229 fprintf(hfile, "extern const char %s[];\n", name); 230 fprintf(cfile, "const char %s[SYNBASE + CHAR_MAX + 1] = {\n", name); 231 } 232 233 234 static void 235 add_one(const char *key, const char *type) 236 { 237 fprintf(cfile, "\t[SYNBASE + %s] = %s,\n", key, type); 238 } 239 240 241 /* 242 * Add default values to the syntax table. 243 */ 244 245 static void 246 add_default(void) 247 { 248 add_one("PEOF", "CEOF"); 249 add_one("CTLESC", "CCTL"); 250 add_one("CTLVAR", "CCTL"); 251 add_one("CTLENDVAR", "CCTL"); 252 add_one("CTLBACKQ", "CCTL"); 253 add_one("CTLBACKQ + CTLQUOTE", "CCTL"); 254 add_one("CTLARI", "CCTL"); 255 add_one("CTLENDARI", "CCTL"); 256 add_one("CTLQUOTEMARK", "CCTL"); 257 add_one("CTLQUOTEEND", "CCTL"); 258 } 259 260 261 /* 262 * Output the footer of a syntax table. 263 */ 264 265 static void 266 finish(void) 267 { 268 fputs("};\n", cfile); 269 } 270 271 272 /* 273 * Add entries to the syntax table. 274 */ 275 276 static void 277 add(const char *p, const char *type) 278 { 279 for (; *p; ++p) { 280 char c = *p; 281 switch (c) { 282 case '\t': c = 't'; break; 283 case '\n': c = 'n'; break; 284 case '\'': c = '\''; break; 285 case '\\': c = '\\'; break; 286 287 default: 288 fprintf(cfile, "\t[SYNBASE + '%c'] = %s,\n", c, type); 289 continue; 290 } 291 fprintf(cfile, "\t[SYNBASE + '\\%c'] = %s,\n", c, type); 292 } 293 } 294 295 296 /* 297 * Output character classification macros (e.g. is_digit). If digits are 298 * contiguous, we can test for them quickly. 299 */ 300 301 static const char *macro[] = { 302 "#define is_digit(c)\t((unsigned int)((c) - '0') <= 9)", 303 "#define is_eof(c)\t((c) == PEOF)", 304 "#define is_alpha(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER))", 305 "#define is_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER))", 306 "#define is_in_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))", 307 "#define is_special(c)\t((is_type+SYNBASE)[(int)c] & (ISSPECL|ISDIGIT))", 308 "#define digit_val(c)\t((c) - '0')", 309 NULL 310 }; 311 312 static void 313 output_type_macros(void) 314 { 315 const char **pp; 316 317 for (pp = macro ; *pp ; pp++) 318 fprintf(hfile, "%s\n", *pp); 319 } 320