1 /* $NetBSD: pi.c,v 1.8 2001/02/05 01:44:07 christos 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)pi.c 8.1 (Berkeley) 6/6/93"; 40 #endif 41 __RCSID("$NetBSD: pi.c,v 1.8 2001/02/05 01:44:07 christos Exp $"); 42 #endif /* not lint */ 43 44 #include <stdio.h> 45 #include <ctype.h> 46 #include <string.h> 47 #include "error.h" 48 49 static char *c_linenumber; 50 static char *unk_hdr[] = {"In", "program", "???"}; 51 static char **c_header = &unk_hdr[0]; 52 53 boolean alldigits __P((char *)); 54 boolean isdateformat __P((int, char **)); 55 boolean instringset __P((char *, char **)); 56 Errorclass pi __P((void)); 57 boolean piptr __P((char *)); 58 59 60 /* 61 * Attempt to handle error messages produced by pi (and by pc) 62 * 63 * problem #1: There is no file name available when a file does not 64 * use a #include; this will have to be given to error 65 * in the command line. 66 * problem #2: pi doesn't always tell you what line number 67 * a error refers to; for example during the tree 68 * walk phase of code generation and error detection, 69 * an error can refer to "variable foo in procedure bletch" 70 * without giving a line number 71 * problem #3: line numbers, when available, are attached to 72 * the source line, along with the source line itself 73 * These line numbers must be extracted, and 74 * the source line thrown away. 75 * problem #4: Some error messages produce more than one line number 76 * on the same message. 77 * There are only two (I think): 78 * %s undefined on line%s 79 * %s improperly used on line%s 80 * here, the %s makes line plural or singular. 81 * 82 * Here are the error strings used in pi version 1.2 that can refer 83 * to a file name or line number: 84 * 85 * Multiply defined label in case, lines %d and %d 86 * Goto %s from line %d is into a structured statement 87 * End matched %s on line %d 88 * Inserted keyword end matching %s on line %d 89 * 90 * Here are the general pi patterns recognized: 91 * define piptr == -.*^-.* 92 * define msg = .* 93 * define digit = [0-9] 94 * definename = .* 95 * define date_format letter*3 letter*3 (digit | (digit digit)) 96 * (digit | (digit digit)):digit*2 digit*4 97 * 98 * {e,E} (piptr) (msg) Encounter an error during textual scan 99 * E {digit}* - (msg) Have an error message that refers to a new line 100 * E - msg Have an error message that refers to current 101 * function, program or procedure 102 * (date_format) (name): When switch compilation files 103 * ... (msg) When refer to the previous line 104 * 'In' ('procedure'|'function'|'program') (name): 105 * pi is now complaining about 2nd pass errors. 106 * 107 * Here is the output from a compilation 108 * 109 * 110 * 2 var i:integer; 111 * e --------------^--- Inserted ';' 112 * E 2 - All variables must be declared in one var part 113 * E 5 - Include filename must end in .i 114 * Mon Apr 21 15:56 1980 test.h: 115 * 2 begin 116 * e ------^--- Inserted ';' 117 * Mon Apr 21 16:06 1980 test.p: 118 * E 2 - Function type must be specified 119 * 6 procedure foo(var x:real); 120 * e ------^--- Inserted ';' 121 * In function bletch: 122 * E - No assignment to the function variable 123 * w - variable x is never used 124 * E 6 - foo is already defined in this block 125 * In procedure foo: 126 * w - variable x is neither used nor set 127 * 9 z : = 23; 128 * E --------------^--- Undefined variable 129 * 10 y = [1]; 130 * e ----------------^--- Inserted ':' 131 * 13 z := 345.; 132 * e -----------------------^--- Digits required after decimal point 133 * E 10 - Constant set involved in non set context 134 * E 11 - Type clash: real is incompatible with integer 135 * ... Type of expression clashed with type of variable in assignment 136 * E 12 - Parameter type not identical to type of var parameter x of foo 137 * In program mung: 138 * w - variable y is never used 139 * w - type foo is never used 140 * w - function bletch is never used 141 * E - z undefined on lines 9 13 142 */ 143 char *Months[] = { 144 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 145 "Jul", "Aug", "Sep", "Oct","Nov", "Dec", 146 0 147 }; 148 char *Days[] = { 149 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0 150 }; 151 char *Piroutines[] = { 152 "program", "function", "procedure", 0 153 }; 154 155 156 static boolean structured, multiple; 157 158 char *pi_Endmatched[] = {"End", "matched"}; 159 char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"}; 160 161 char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"}; 162 char *pi_structured[] = {"is", "into", "a", "structured", "statement"}; 163 164 char *pi_und1[] = {"undefined", "on", "line"}; 165 char *pi_und2[] = {"undefined", "on", "lines"}; 166 char *pi_imp1[] = {"improperly", "used", "on", "line"}; 167 char *pi_imp2[] = {"improperly", "used", "on", "lines"}; 168 169 boolean 170 alldigits(string) 171 char *string; 172 { 173 for (; *string && isdigit((unsigned char)*string); string++) 174 continue; 175 return(*string == '\0'); 176 } 177 178 boolean 179 instringset(member, set) 180 char *member; 181 char **set; 182 { 183 for(; *set; set++){ 184 if (strcmp(*set, member) == 0) 185 return(TRUE); 186 } 187 return(FALSE); 188 } 189 190 boolean 191 isdateformat(wordc, wordv) 192 int wordc; 193 char **wordv; 194 { 195 return( 196 (wordc == 5) 197 && (instringset(wordv[0], Days)) 198 && (instringset(wordv[1], Months)) 199 && (alldigits(wordv[2])) 200 && (alldigits(wordv[4])) ); 201 } 202 203 boolean 204 piptr(string) 205 char *string; 206 { 207 if (*string != '-') 208 return(FALSE); 209 while (*string && *string == '-') 210 string++; 211 if (*string != '^') 212 return(FALSE); 213 string++; 214 while (*string && *string == '-') 215 string++; 216 return(*string == '\0'); 217 } 218 219 extern int wordc; 220 extern char **wordv; 221 222 Errorclass 223 pi() 224 { 225 char **nwordv; 226 227 nwordv = NULL; 228 if (wordc < 2) 229 return (C_UNKNOWN); 230 if ( ( strlen(wordv[1]) == 1) 231 && ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') ) 232 && ( piptr(wordv[2]) ) 233 ) { 234 boolean longpiptr = 0; 235 /* 236 * We have recognized a first pass error of the form: 237 * letter ------^---- message 238 * 239 * turn into an error message of the form: 240 * 241 * file line 'pascal errortype' letter \n |---- message 242 * or of the form: 243 * file line letter |---- message 244 * when there are strlen("(*[pi]") or more 245 * preceding '-' on the error pointer. 246 * 247 * Where the | is intended to be a down arrow, so that 248 * the pi error messages can be inserted above the 249 * line in error, instead of below. (All of the other 250 * languages put their messages before the source line, 251 * instead of after it as does pi.) 252 * 253 * where the pointer to the error has been truncated 254 * by 6 characters to account for the fact that 255 * the pointer points into a tab preceded input line. 256 */ 257 language = INPI; 258 (void)substitute(wordv[2], '^', '|'); 259 longpiptr = position(wordv[2],'|') > (6+8); 260 nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1); 261 nwordv[0] = strsave(currentfilename); 262 nwordv[1] = strsave(c_linenumber); 263 if (!longpiptr){ 264 nwordv[2] = "pascal errortype"; 265 nwordv[3] = wordv[1]; 266 nwordv[4] = strsave("%%%\n"); 267 if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */ 268 nwordv[5] += (8-2); /* bump over 6 characters */ 269 } 270 wordv = nwordv - 1; /* convert to 1 based */ 271 wordc += longpiptr ? 2 : 4; 272 return(C_TRUE); 273 } 274 if ( (wordc >= 4) 275 && (strlen(wordv[1]) == 1) 276 && ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') ) 277 && (alldigits(wordv[2])) 278 && (strlen(wordv[3]) == 1) 279 && (wordv[3][0] == '-') 280 ){ 281 /* 282 * Message of the form: letter linenumber - message 283 * Turn into form: filename linenumber letter - message 284 */ 285 language = INPI; 286 nwordv = wordvsplice(1, wordc, wordv + 1); 287 nwordv[0] = strsave(currentfilename); 288 nwordv[1] = wordv[2]; 289 nwordv[2] = wordv[1]; 290 c_linenumber = wordv[2]; 291 wordc += 1; 292 wordv = nwordv - 1; 293 return(C_TRUE); 294 } 295 if ( (wordc >= 3) 296 && (strlen(wordv[1]) == 1) 297 && ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') ) 298 && (strlen(wordv[2]) == 1) 299 && (wordv[2][0] == '-') 300 ) { 301 /* 302 * Message of the form: letter - message 303 * This happens only when we are traversing the tree 304 * during the second pass of pi, and discover semantic 305 * errors. 306 * 307 * We have already (presumably) saved the header message 308 * and can now construct a nulled error message for the 309 * current file. 310 * 311 * Turns into a message of the form: 312 * filename (header) letter - message 313 * 314 * First, see if it is a message referring to more than 315 * one line number. Only of the form: 316 * %s undefined on line%s 317 * %s improperly used on line%s 318 */ 319 boolean undefined = 0; 320 int wordindex; 321 322 language = INPI; 323 if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) ) 324 || (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) ) 325 || (wordvcmp(wordv+2, 4, pi_imp1) == 0) 326 || (wordvcmp(wordv+2, 4, pi_imp2) == 0) 327 ){ 328 for (wordindex = undefined ? 5 : 6; wordindex <= wordc; 329 wordindex++){ 330 nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1); 331 nwordv[0] = strsave(currentfilename); 332 nwordv[1] = wordv[wordindex]; 333 if (wordindex != wordc) 334 erroradd(undefined ? 4 : 5, nwordv, 335 C_TRUE, C_UNKNOWN); 336 } 337 wordc = undefined ? 4 : 5; 338 wordv = nwordv - 1; 339 return(C_TRUE); 340 } 341 342 nwordv = wordvsplice(1+3, wordc, wordv+1); 343 nwordv[0] = strsave(currentfilename); 344 nwordv[1] = strsave(c_header[0]); 345 nwordv[2] = strsave(c_header[1]); 346 nwordv[3] = strsave(c_header[2]); 347 wordv = nwordv - 1; 348 wordc += 1 + 3; 349 return(C_THISFILE); 350 } 351 if (strcmp(wordv[1], "...") == 0){ 352 /* 353 * have a continuation error message 354 * of the form: ... message 355 * Turn into form : filename linenumber message 356 */ 357 language = INPI; 358 nwordv = wordvsplice(1, wordc, wordv+1); 359 nwordv[0] = strsave(currentfilename); 360 nwordv[1] = strsave(c_linenumber); 361 wordv = nwordv - 1; 362 wordc += 1; 363 return(C_TRUE); 364 } 365 if( (wordc == 6) 366 && (lastchar(wordv[6]) == ':') 367 && (isdateformat(5, wordv + 1)) 368 ){ 369 /* 370 * Have message that tells us we have changed files 371 */ 372 language = INPI; 373 currentfilename = strsave(wordv[6]); 374 clob_last(currentfilename, '\0'); 375 return(C_SYNC); 376 } 377 if( (wordc == 3) 378 && (strcmp(wordv[1], "In") == 0) 379 && (lastchar(wordv[3]) == ':') 380 && (instringset(wordv[2], Piroutines)) 381 ) { 382 language = INPI; 383 c_header = wordvsplice(0, wordc, wordv+1); 384 return(C_SYNC); 385 } 386 /* 387 * now, check for just the line number followed by the text 388 */ 389 if (alldigits(wordv[1])){ 390 language = INPI; 391 c_linenumber = wordv[1]; 392 return(C_IGNORE); 393 } 394 /* 395 * Attempt to match messages refering to a line number 396 * 397 * Multiply defined label in case, lines %d and %d 398 * Goto %s from line %d is into a structured statement 399 * End matched %s on line %d 400 * Inserted keyword end matching %s on line %d 401 */ 402 multiple = structured = 0; 403 if ( 404 ( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0)) 405 || ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0)) 406 || ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) ) 407 || ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) )) 408 ){ 409 language = INPI; 410 nwordv = wordvsplice(2, wordc, wordv+1); 411 nwordv[0] = strsave(currentfilename); 412 nwordv[1] = structured ? wordv [5] : wordv[wordc]; 413 wordc += 2; 414 wordv = nwordv - 1; 415 if (!multiple) 416 return(C_TRUE); 417 erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN); 418 nwordv = wordvsplice(0, wordc, nwordv); 419 nwordv[1] = wordv[wordc - 2]; 420 return(C_TRUE); 421 } 422 return(C_UNKNOWN); 423 } 424