1 /* $Header: /p/tcsh/cvsroot/tcsh/gethost.c,v 1.12 2006/03/02 18:46:44 christos Exp $ */ 2 /* 3 * gethost.c: Create version file from prototype 4 */ 5 /*- 6 * Copyright (c) 1980, 1991 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 #include "sh.h" 34 35 RCSID("$tcsh: gethost.c,v 1.12 2006/03/02 18:46:44 christos Exp $") 36 37 #ifdef SCO 38 # define perror __perror 39 # define rename __rename 40 # define getopt __getopt 41 # define system __system 42 #endif 43 #include <stdio.h> 44 #ifdef SCO 45 # undef perror 46 # undef rename 47 # undef getopt 48 # undef system 49 #endif 50 51 #include <ctype.h> 52 53 #define ISSPACE(p) (isspace((unsigned char) (p)) && (p) != '\n') 54 55 /* 56 * We cannot do that, because some compilers like #line and others 57 * like # <lineno> 58 * #define LINEDIRECTIVE 59 */ 60 61 static const char *keyword[] = 62 { 63 "vendor", 64 #define T_VENDOR 0 65 "hosttype", 66 #define T_HOSTTYPE 1 67 "machtype", 68 #define T_MACHTYPE 2 69 "ostype", 70 #define T_OSTYPE 3 71 "newdef", 72 #define T_NEWDEF 4 73 "enddef", 74 #define T_ENDDEF 5 75 "newcode", 76 #define T_NEWCODE 6 77 "endcode", 78 #define T_ENDCODE 7 79 "comment", 80 #define T_COMMENT 8 81 "macro", 82 #define T_MACRO 9 83 NULL 84 #define T_NONE 10 85 }; 86 87 #define S_DISCARD 0 88 #define S_COMMENT 1 89 #define S_CODE 2 90 #define S_KEYWORD 3 91 92 static int findtoken (char *); 93 static char *gettoken (char **, char *); 94 95 int main (int, char *[]); 96 97 /* findtoken(): 98 * Return the token number of the given token 99 */ 100 static int 101 findtoken(char *ptr) 102 { 103 int i; 104 105 if (ptr == NULL || *ptr == '\0') 106 return T_NONE; 107 108 for (i = 0; keyword[i] != NULL; i++) 109 if (strcmp(keyword[i], ptr) == 0) 110 return i; 111 112 return T_NONE; 113 } 114 115 116 /* gettoken(): 117 * Get : delimited token and remove leading/trailing blanks/newlines 118 */ 119 static char * 120 gettoken(char **pptr, char *token) 121 { 122 char *ptr = *pptr; 123 char *tok = token; 124 125 for (; *ptr && ISSPACE(*ptr); ptr++) 126 continue; 127 128 for (; *ptr && *ptr != ':'; *tok++ = *ptr++) 129 continue; 130 131 if (*ptr == ':') 132 ptr++; 133 else 134 tok--; 135 136 for (tok--; tok >= token && *tok && ISSPACE(*tok); tok--) 137 continue; 138 139 *++tok = '\0'; 140 141 *pptr = ptr; 142 return token; 143 } 144 145 146 int 147 main(int argc, char *argv[]) 148 { 149 char line[INBUFSIZE]; 150 char *pname; 151 const char *fname = "stdin"; 152 char *ptr, *tok; 153 char defs[INBUFSIZE]; 154 char stmt[INBUFSIZE]; 155 FILE *fp = stdin; 156 int lineno = 0; 157 int inprocess = 0; 158 int token, state; 159 int errs = 0; 160 161 if ((pname = strrchr(argv[0], '/')) == NULL) 162 pname = argv[0]; 163 else 164 pname++; 165 166 if (argc > 2) { 167 (void) fprintf(stderr, "Usage: %s [<filename>]\n", pname); 168 return 1; 169 } 170 171 if (argc == 2) 172 if ((fp = fopen(fname = argv[1], "r")) == NULL) { 173 (void) fprintf(stderr, "%s: Cannot open `%s'\n", pname, fname); 174 return 1; 175 } 176 177 state = S_DISCARD; 178 179 while ((ptr = fgets(line, sizeof(line), fp)) != NULL) { 180 lineno++; 181 switch (token = findtoken(gettoken(&ptr, defs))) { 182 case T_NEWCODE: 183 state = S_CODE; 184 break; 185 186 case T_ENDCODE: 187 state = S_DISCARD; 188 break; 189 190 case T_COMMENT: 191 state = S_COMMENT; 192 break; 193 194 case T_NEWDEF: 195 state = S_KEYWORD; 196 break; 197 198 case T_ENDDEF: 199 state = S_DISCARD; 200 break; 201 202 case T_VENDOR: 203 state = S_KEYWORD; 204 break; 205 206 case T_HOSTTYPE: 207 state = S_KEYWORD; 208 break; 209 210 case T_MACHTYPE: 211 state = S_KEYWORD; 212 break; 213 214 case T_OSTYPE: 215 state = S_KEYWORD; 216 break; 217 218 case T_MACRO: 219 if (gettoken(&ptr, defs) == NULL) { 220 (void) fprintf(stderr, "%s: \"%s\", %d: Missing macro name\n", 221 pname, fname, lineno); 222 break; 223 } 224 if (gettoken(&ptr, stmt) == NULL) { 225 (void) fprintf(stderr, "%s: \"%s\", %d: Missing macro body\n", 226 pname, fname, lineno); 227 break; 228 } 229 (void) fprintf(stdout, "\n#if %s\n# define %s\n#endif\n\n", stmt, 230 defs); 231 break; 232 233 case T_NONE: 234 if (state != S_CODE && defs && *defs != '\0') { 235 (void) fprintf(stderr, "%s: \"%s\", %d: Discarded\n", 236 pname, fname, lineno); 237 if (++errs == 30) { 238 (void) fprintf(stderr, "%s: Too many errors\n", pname); 239 return 1; 240 } 241 break; 242 } 243 (void) fprintf(stdout, "%s", line); 244 break; 245 246 default: 247 (void) fprintf(stderr, "%s: \"%s\", %d: Unexpected token\n", 248 pname, fname, lineno); 249 return 1; 250 } 251 252 switch (state) { 253 case S_DISCARD: 254 if (inprocess) { 255 inprocess = 0; 256 (void) fprintf(stdout, "#endif\n"); 257 } 258 break; 259 260 case S_KEYWORD: 261 tok = gettoken(&ptr, defs); 262 if (token == T_NEWDEF) { 263 if (inprocess) { 264 (void) fprintf(stderr, "%s: \"%s\", %d: Missing enddef\n", 265 pname, fname, lineno); 266 return 1; 267 } 268 if (tok == NULL) { 269 (void) fprintf(stderr, "%s: \"%s\", %d: No defs\n", 270 pname, fname, lineno); 271 return 1; 272 } 273 (void) fprintf(stdout, "\n\n"); 274 #ifdef LINEDIRECTIVE 275 (void) fprintf(stdout, "# %d \"%s\"\n", lineno + 1, fname); 276 #endif /* LINEDIRECTIVE */ 277 (void) fprintf(stdout, "#if %s\n", defs); 278 inprocess = 1; 279 } 280 else { 281 if (tok && *tok) 282 (void) fprintf(stdout, "# if (%s) && !defined(_%s_)\n", 283 defs, keyword[token]); 284 else 285 (void) fprintf(stdout, "# if !defined(_%s_)\n", 286 keyword[token]); 287 288 if (gettoken(&ptr, stmt) == NULL) { 289 (void) fprintf(stderr, "%s: \"%s\", %d: No statement\n", 290 pname, fname, lineno); 291 return 1; 292 } 293 (void) fprintf(stdout, "# define _%s_\n", keyword[token]); 294 (void) fprintf(stdout, " %s = %s;\n", keyword[token], stmt); 295 (void) fprintf(stdout, "# endif\n"); 296 } 297 break; 298 299 case S_COMMENT: 300 if (gettoken(&ptr, defs)) 301 (void) fprintf(stdout, " /* %s */\n", defs); 302 break; 303 304 case S_CODE: 305 if (token == T_NEWCODE) { 306 #ifdef LINEDIRECTIVE 307 (void) fprintf(stdout, "# %d \"%s\"\n", lineno + 1, fname); 308 #endif /* LINEDIRECTIVE */ 309 } 310 break; 311 312 default: 313 (void) fprintf(stderr, "%s: \"%s\", %d: Unexpected state\n", 314 pname, fname, lineno); 315 return 1; 316 } 317 } 318 319 if (inprocess) { 320 (void) fprintf(stderr, "%s: \"%s\", %d: Missing enddef\n", 321 pname, fname, lineno); 322 return 1; 323 } 324 325 if (fp != stdin) 326 (void) fclose(fp); 327 328 return 0; 329 } 330