1 /* $NetBSD: pi.c,v 1.17 2009/08/13 06:59:37 dholland Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)pi.c 8.1 (Berkeley) 6/6/93"; 36 #endif 37 __RCSID("$NetBSD: pi.c,v 1.17 2009/08/13 06:59:37 dholland Exp $"); 38 #endif /* not lint */ 39 40 #include <stdio.h> 41 #include <ctype.h> 42 #include <string.h> 43 #include <stdlib.h> 44 #include "error.h" 45 46 #if 0 /* not const-correct */ 47 static char *unk_hdr[] = {"In", "program", "???"}; 48 #else 49 DECL_STRINGS_3(static, unk_hdr, "In", "program", "???"); 50 #endif 51 52 static char *c_linenumber; 53 static char **c_header = &unk_hdr[0]; 54 55 static boolean alldigits(const char *); 56 static boolean isdateformat(int, char **); 57 static boolean instringset(const char *, const char **); 58 static boolean piptr(const char *); 59 60 61 /* 62 * Attempt to handle error messages produced by pi (and by pc) 63 * 64 * problem #1: There is no file name available when a file does not 65 * use a #include; this will have to be given to error 66 * in the command line. 67 * problem #2: pi doesn't always tell you what line number 68 * a error refers to; for example during the tree 69 * walk phase of code generation and error detection, 70 * an error can refer to "variable foo in procedure bletch" 71 * without giving a line number 72 * problem #3: line numbers, when available, are attached to 73 * the source line, along with the source line itself 74 * These line numbers must be extracted, and 75 * the source line thrown away. 76 * problem #4: Some error messages produce more than one line number 77 * on the same message. 78 * There are only two (I think): 79 * %s undefined on line%s 80 * %s improperly used on line%s 81 * here, the %s makes line plural or singular. 82 * 83 * Here are the error strings used in pi version 1.2 that can refer 84 * to a file name or line number: 85 * 86 * Multiply defined label in case, lines %d and %d 87 * Goto %s from line %d is into a structured statement 88 * End matched %s on line %d 89 * Inserted keyword end matching %s on line %d 90 * 91 * Here are the general pi patterns recognized: 92 * define piptr == -.*^-.* 93 * define msg = .* 94 * define digit = [0-9] 95 * definename = .* 96 * define date_format letter*3 letter*3 (digit | (digit digit)) 97 * (digit | (digit digit)):digit*2 digit*4 98 * 99 * {e,E} (piptr) (msg) Encounter an error during textual scan 100 * E {digit}* - (msg) Have an error message that refers to a new line 101 * E - msg Have an error message that refers to current 102 * function, program or procedure 103 * (date_format) (name): When switch compilation files 104 * ... (msg) When refer to the previous line 105 * 'In' ('procedure'|'function'|'program') (name): 106 * pi is now complaining about 2nd pass errors. 107 * 108 * Here is the output from a compilation 109 * 110 * 111 * 2 var i:integer; 112 * e --------------^--- Inserted ';' 113 * E 2 - All variables must be declared in one var part 114 * E 5 - Include filename must end in .i 115 * Mon Apr 21 15:56 1980 test.h: 116 * 2 begin 117 * e ------^--- Inserted ';' 118 * Mon Apr 21 16:06 1980 test.p: 119 * E 2 - Function type must be specified 120 * 6 procedure foo(var x:real); 121 * e ------^--- Inserted ';' 122 * In function bletch: 123 * E - No assignment to the function variable 124 * w - variable x is never used 125 * E 6 - foo is already defined in this block 126 * In procedure foo: 127 * w - variable x is neither used nor set 128 * 9 z : = 23; 129 * E --------------^--- Undefined variable 130 * 10 y = [1]; 131 * e ----------------^--- Inserted ':' 132 * 13 z := 345.; 133 * e -----------------------^--- Digits required after decimal point 134 * E 10 - Constant set involved in non set context 135 * E 11 - Type clash: real is incompatible with integer 136 * ... Type of expression clashed with type of variable in assignment 137 * E 12 - Parameter type not identical to type of var parameter x of foo 138 * In program mung: 139 * w - variable y is never used 140 * w - type foo is never used 141 * w - function bletch is never used 142 * E - z undefined on lines 9 13 143 */ 144 static const char *Months[] = { 145 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 146 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", 147 0 148 }; 149 static const char *Days[] = { 150 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0 151 }; 152 static const char *Piroutines[] = { 153 "program", "function", "procedure", 0 154 }; 155 156 157 static boolean structured, multiple; 158 159 #if 0 /* not const-correct */ 160 static char *pi_Endmatched[] = {"End", "matched"}; 161 static char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"}; 162 163 static char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"}; 164 static char *pi_structured[] = {"is", "into", "a", "structured", "statement"}; 165 166 static char *pi_und1[] = {"undefined", "on", "line"}; 167 static char *pi_und2[] = {"undefined", "on", "lines"}; 168 static char *pi_imp1[] = {"improperly", "used", "on", "line"}; 169 static char *pi_imp2[] = {"improperly", "used", "on", "lines"}; 170 171 #else 172 DECL_STRINGS_2(static, pi_Endmatched, "End", "matched"); 173 DECL_STRINGS_4(static, pi_Inserted, "Inserted", "keyword", "end", "matching"); 174 175 DECL_STRINGS_6(static, pi_multiple, 176 "Mutiply", "defined", "label", "in", "case,", "line"); 177 DECL_STRINGS_5(static, pi_structured, 178 "is", "into", "a", "structured", "statement"); 179 180 DECL_STRINGS_3(static, pi_und1, "undefined", "on", "line"); 181 DECL_STRINGS_3(static, pi_und2, "undefined", "on", "lines"); 182 DECL_STRINGS_4(static, pi_imp1, "improperly", "used", "on", "line"); 183 DECL_STRINGS_4(static, pi_imp2, "improperly", "used", "on", "lines"); 184 185 #endif 186 187 static boolean 188 alldigits(const char *string) 189 { 190 for (; *string && isdigit((unsigned char)*string); string++) 191 continue; 192 return (*string == '\0'); 193 } 194 195 static boolean 196 instringset(const char *member, const char **set) 197 { 198 for (; *set; set++) { 199 if (strcmp(*set, member) == 0) 200 return true; 201 } 202 return false; 203 } 204 205 static boolean 206 isdateformat(int wordc, char **wordv) 207 { 208 return ( 209 (wordc == 5) 210 && (instringset(wordv[0], Days)) 211 && (instringset(wordv[1], Months)) 212 && (alldigits(wordv[2])) 213 && (alldigits(wordv[4]))); 214 } 215 216 static boolean 217 piptr(const char *string) 218 { 219 if (*string != '-') 220 return false; 221 while (*string && *string == '-') 222 string++; 223 if (*string != '^') 224 return false; 225 string++; 226 while (*string && *string == '-') 227 string++; 228 return (*string == '\0'); 229 } 230 231 Errorclass 232 pi(void) 233 { 234 char **nwordv; 235 236 nwordv = NULL; 237 if (cur_wordc < 2) 238 return (C_UNKNOWN); 239 if (strlen(cur_wordv[1]) == 1 240 && ( cur_wordv[1][0] == 'e' || cur_wordv[1][0] == 'E') 241 && piptr(cur_wordv[2]) 242 ) { 243 boolean longpiptr = 0; 244 245 /* 246 * We have recognized a first pass error of the form: 247 * letter ------^---- message 248 * 249 * turn into an error message of the form: 250 * 251 * file line 'pascal errortype' letter \n |---- message 252 * or of the form: 253 * file line letter |---- message 254 * when there are strlen("(*[pi]") or more 255 * preceding '-' on the error pointer. 256 * 257 * Where the | is intended to be a down arrow, so that 258 * the pi error messages can be inserted above the 259 * line in error, instead of below. (All of the other 260 * languages put their messages before the source line, 261 * instead of after it as does pi.) 262 * 263 * where the pointer to the error has been truncated 264 * by 6 characters to account for the fact that 265 * the pointer points into a tab preceded input line. 266 */ 267 language = INPI; 268 (void)substitute(cur_wordv[2], '^', '|'); 269 longpiptr = position(cur_wordv[2],'|') > (6+8); 270 nwordv = wordvsplice(longpiptr ? 2 : 4, cur_wordc, cur_wordv+1); 271 nwordv[0] = strdup(currentfilename); 272 nwordv[1] = strdup(c_linenumber); 273 if (!longpiptr) { 274 nwordv[2] = Strdup("pascal errortype"); /* XXX leaked */ 275 nwordv[3] = cur_wordv[1]; 276 nwordv[4] = strdup("%%%\n"); 277 if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */ 278 nwordv[5] += (8-2); /* bump over 6 characters */ 279 } 280 cur_wordv = nwordv - 1; /* convert to 1 based */ 281 cur_wordc += longpiptr ? 2 : 4; 282 return (C_TRUE); 283 } 284 if (cur_wordc >= 4 285 && strlen(cur_wordv[1]) == 1 286 && (*cur_wordv[1] == 'E' || *cur_wordv[1] == 'w' || *cur_wordv[1] == 'e') 287 && alldigits(cur_wordv[2]) 288 && strlen(cur_wordv[3]) == 1 289 && cur_wordv[3][0] == '-' 290 ) { 291 /* 292 * Message of the form: letter linenumber - message 293 * Turn into form: filename linenumber letter - message 294 */ 295 language = INPI; 296 nwordv = wordvsplice(1, cur_wordc, cur_wordv + 1); 297 nwordv[0] = strdup(currentfilename); 298 nwordv[1] = cur_wordv[2]; 299 nwordv[2] = cur_wordv[1]; 300 c_linenumber = cur_wordv[2]; 301 cur_wordc += 1; 302 cur_wordv = nwordv - 1; 303 return (C_TRUE); 304 } 305 if (cur_wordc >= 3 306 && strlen(cur_wordv[1]) == 1 307 && (*cur_wordv[1] == 'E' || *cur_wordv[1] == 'w' || *cur_wordv[1] == 'e') 308 && strlen(cur_wordv[2]) == 1 309 && cur_wordv[2][0] == '-' 310 ) { 311 /* 312 * Message of the form: letter - message 313 * 314 * This happens only when we are traversing the tree 315 * during the second pass of pi, and discover semantic 316 * errors. 317 * 318 * We have already (presumably) saved the header message 319 * and can now construct a nulled error message for the 320 * current file. 321 * 322 * Turns into a message of the form: 323 * filename (header) letter - message 324 * 325 * First, see if it is a message referring to more than 326 * one line number. Only of the form: 327 * %s undefined on line%s 328 * %s improperly used on line%s 329 */ 330 boolean undefined = 0; 331 int wordindex; 332 333 language = INPI; 334 if ((undefined = (wordvcmp(cur_wordv+2, 3, pi_und1) == 0)) 335 || (undefined = (wordvcmp(cur_wordv+2, 3, pi_und2) == 0)) 336 || wordvcmp(cur_wordv+2, 4, pi_imp1) == 0 337 || wordvcmp(cur_wordv+2, 4, pi_imp2) == 0 338 ) { 339 for (wordindex = undefined ? 5 : 6; 340 wordindex <= cur_wordc; 341 wordindex++) { 342 if (nwordv) { 343 free(nwordv[0]); 344 free(nwordv); 345 } 346 nwordv = wordvsplice(2, undefined ? 2 : 3, cur_wordv+1); 347 nwordv[0] = strdup(currentfilename); 348 nwordv[1] = cur_wordv[wordindex]; 349 if (wordindex != cur_wordc) 350 erroradd(undefined ? 4 : 5, nwordv, 351 C_TRUE, C_UNKNOWN); 352 } 353 cur_wordc = undefined ? 4 : 5; 354 cur_wordv = nwordv - 1; 355 return (C_TRUE); 356 } 357 358 nwordv = wordvsplice(1+3, cur_wordc, cur_wordv+1); 359 nwordv[0] = strdup(currentfilename); 360 nwordv[1] = strdup(c_header[0]); 361 nwordv[2] = strdup(c_header[1]); 362 nwordv[3] = strdup(c_header[2]); 363 cur_wordv = nwordv - 1; 364 cur_wordc += 1 + 3; 365 return (C_THISFILE); 366 } 367 if (strcmp(cur_wordv[1], "...") == 0) { 368 /* 369 * have a continuation error message 370 * of the form: ... message 371 * Turn into form : filename linenumber message 372 */ 373 language = INPI; 374 nwordv = wordvsplice(1, cur_wordc, cur_wordv+1); 375 nwordv[0] = strdup(currentfilename); 376 nwordv[1] = strdup(c_linenumber); 377 cur_wordv = nwordv - 1; 378 cur_wordc += 1; 379 return (C_TRUE); 380 } 381 if (cur_wordc == 6 382 && lastchar(cur_wordv[6]) == ':' 383 && isdateformat(5, cur_wordv + 1) 384 ) { 385 /* 386 * Have message that tells us we have changed files 387 */ 388 language = INPI; 389 currentfilename = strdup(cur_wordv[6]); 390 clob_last(currentfilename, '\0'); 391 return (C_SYNC); 392 } 393 if (cur_wordc == 3 394 && strcmp(cur_wordv[1], "In") == 0 395 && lastchar(cur_wordv[3]) == ':' 396 && instringset(cur_wordv[2], Piroutines) 397 ) { 398 language = INPI; 399 c_header = wordvsplice(0, cur_wordc, cur_wordv+1); 400 return (C_SYNC); 401 } 402 403 /* 404 * now, check for just the line number followed by the text 405 */ 406 if (alldigits(cur_wordv[1])) { 407 language = INPI; 408 c_linenumber = cur_wordv[1]; 409 return (C_IGNORE); 410 } 411 412 /* 413 * Attempt to match messages refering to a line number 414 * 415 * Multiply defined label in case, lines %d and %d 416 * Goto %s from line %d is into a structured statement 417 * End matched %s on line %d 418 * Inserted keyword end matching %s on line %d 419 */ 420 multiple = structured = 0; 421 if ( 422 (cur_wordc == 6 && wordvcmp(cur_wordv+1, 2, pi_Endmatched) == 0) 423 || (cur_wordc == 8 && wordvcmp(cur_wordv+1, 4, pi_Inserted) == 0) 424 || (multiple = (cur_wordc == 9 && wordvcmp(cur_wordv+1,6, pi_multiple) == 0)) 425 || (structured = (cur_wordc == 10 && wordvcmp(cur_wordv+6,5, pi_structured) == 0)) 426 ) { 427 language = INPI; 428 nwordv = wordvsplice(2, cur_wordc, cur_wordv+1); 429 nwordv[0] = strdup(currentfilename); 430 nwordv[1] = structured ? cur_wordv [5] : cur_wordv[cur_wordc]; 431 cur_wordc += 2; 432 cur_wordv = nwordv - 1; 433 if (!multiple) 434 return (C_TRUE); 435 erroradd(cur_wordc, nwordv, C_TRUE, C_UNKNOWN); 436 nwordv = wordvsplice(0, cur_wordc, nwordv); 437 nwordv[1] = cur_wordv[cur_wordc - 2]; 438 return (C_TRUE); 439 } 440 return (C_UNKNOWN); 441 } 442