1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. 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 34 #ifndef lint 35 /*static char sccsid[] = "from: @(#)pi.c 5.5 (Berkeley) 2/26/91";*/ 36 static char rcsid[] = "$Id: pi.c,v 1.2 1993/08/01 18:16:42 mycroft Exp $"; 37 #endif /* not lint */ 38 39 #include <stdio.h> 40 #include <ctype.h> 41 #include <string.h> 42 #include "error.h" 43 44 extern char *currentfilename; 45 static char *c_linenumber; 46 static char *unk_hdr[] = {"In", "program", "???"}; 47 static char **c_header = &unk_hdr[0]; 48 49 /* 50 * Attempt to handle error messages produced by pi (and by pc) 51 * 52 * problem #1: There is no file name available when a file does not 53 * use a #include; this will have to be given to error 54 * in the command line. 55 * problem #2: pi doesn't always tell you what line number 56 * a error refers to; for example during the tree 57 * walk phase of code generation and error detection, 58 * an error can refer to "variable foo in procedure bletch" 59 * without giving a line number 60 * problem #3: line numbers, when available, are attached to 61 * the source line, along with the source line itself 62 * These line numbers must be extracted, and 63 * the source line thrown away. 64 * problem #4: Some error messages produce more than one line number 65 * on the same message. 66 * There are only two (I think): 67 * %s undefined on line%s 68 * %s improperly used on line%s 69 * here, the %s makes line plural or singular. 70 * 71 * Here are the error strings used in pi version 1.2 that can refer 72 * to a file name or line number: 73 * 74 * Multiply defined label in case, lines %d and %d 75 * Goto %s from line %d is into a structured statement 76 * End matched %s on line %d 77 * Inserted keyword end matching %s on line %d 78 * 79 * Here are the general pi patterns recognized: 80 * define piptr == -.*^-.* 81 * define msg = .* 82 * define digit = [0-9] 83 * definename = .* 84 * define date_format letter*3 letter*3 (digit | (digit digit)) 85 * (digit | (digit digit)):digit*2 digit*4 86 * 87 * {e,E} (piptr) (msg) Encounter an error during textual scan 88 * E {digit}* - (msg) Have an error message that refers to a new line 89 * E - msg Have an error message that refers to current 90 * function, program or procedure 91 * (date_format) (name): When switch compilation files 92 * ... (msg) When refer to the previous line 93 * 'In' ('procedure'|'function'|'program') (name): 94 * pi is now complaining about 2nd pass errors. 95 * 96 * Here is the output from a compilation 97 * 98 * 99 * 2 var i:integer; 100 * e --------------^--- Inserted ';' 101 * E 2 - All variables must be declared in one var part 102 * E 5 - Include filename must end in .i 103 * Mon Apr 21 15:56 1980 test.h: 104 * 2 begin 105 * e ------^--- Inserted ';' 106 * Mon Apr 21 16:06 1980 test.p: 107 * E 2 - Function type must be specified 108 * 6 procedure foo(var x:real); 109 * e ------^--- Inserted ';' 110 * In function bletch: 111 * E - No assignment to the function variable 112 * w - variable x is never used 113 * E 6 - foo is already defined in this block 114 * In procedure foo: 115 * w - variable x is neither used nor set 116 * 9 z : = 23; 117 * E --------------^--- Undefined variable 118 * 10 y = [1]; 119 * e ----------------^--- Inserted ':' 120 * 13 z := 345.; 121 * e -----------------------^--- Digits required after decimal point 122 * E 10 - Constant set involved in non set context 123 * E 11 - Type clash: real is incompatible with integer 124 * ... Type of expression clashed with type of variable in assignment 125 * E 12 - Parameter type not identical to type of var parameter x of foo 126 * In program mung: 127 * w - variable y is never used 128 * w - type foo is never used 129 * w - function bletch is never used 130 * E - z undefined on lines 9 13 131 */ 132 char *Months[] = { 133 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 134 "Jul", "Aug", "Sep", "Oct","Nov", "Dec", 135 0 136 }; 137 char *Days[] = { 138 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0 139 }; 140 char *Piroutines[] = { 141 "program", "function", "procedure", 0 142 }; 143 144 145 static boolean structured, multiple; 146 147 char *pi_Endmatched[] = {"End", "matched"}; 148 char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"}; 149 150 char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"}; 151 char *pi_structured[] = {"is", "into", "a", "structured", "statement"}; 152 153 char *pi_und1[] = {"undefined", "on", "line"}; 154 char *pi_und2[] = {"undefined", "on", "lines"}; 155 char *pi_imp1[] = {"improperly", "used", "on", "line"}; 156 char *pi_imp2[] = {"improperly", "used", "on", "lines"}; 157 158 boolean alldigits(string) 159 reg char *string; 160 { 161 for (; *string && isdigit(*string); string++) 162 continue; 163 return(*string == '\0'); 164 } 165 boolean instringset(member, set) 166 char *member; 167 reg char **set; 168 { 169 for(; *set; set++){ 170 if (strcmp(*set, member) == 0) 171 return(TRUE); 172 } 173 return(FALSE); 174 } 175 176 boolean isdateformat(wordc, wordv) 177 int wordc; 178 char **wordv; 179 { 180 return( 181 (wordc == 5) 182 && (instringset(wordv[0], Days)) 183 && (instringset(wordv[1], Months)) 184 && (alldigits(wordv[2])) 185 && (alldigits(wordv[4])) ); 186 } 187 188 boolean piptr(string) 189 reg char *string; 190 { 191 if (*string != '-') 192 return(FALSE); 193 while (*string && *string == '-') 194 string++; 195 if (*string != '^') 196 return(FALSE); 197 string++; 198 while (*string && *string == '-') 199 string++; 200 return(*string == '\0'); 201 } 202 203 extern int wordc; 204 extern char **wordv; 205 206 Errorclass pi() 207 { 208 char **nwordv; 209 210 if (wordc < 2) 211 return (C_UNKNOWN); 212 if ( ( strlen(wordv[1]) == 1) 213 && ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') ) 214 && ( piptr(wordv[2]) ) 215 ) { 216 boolean longpiptr = 0; 217 /* 218 * We have recognized a first pass error of the form: 219 * letter ------^---- message 220 * 221 * turn into an error message of the form: 222 * 223 * file line 'pascal errortype' letter \n |---- message 224 * or of the form: 225 * file line letter |---- message 226 * when there are strlen("(*[pi]") or more 227 * preceding '-' on the error pointer. 228 * 229 * Where the | is intended to be a down arrow, so that 230 * the pi error messages can be inserted above the 231 * line in error, instead of below. (All of the other 232 * langauges put thier messages before the source line, 233 * instead of after it as does pi.) 234 * 235 * where the pointer to the error has been truncated 236 * by 6 characters to account for the fact that 237 * the pointer points into a tab preceded input line. 238 */ 239 language = INPI; 240 (void)substitute(wordv[2], '^', '|'); 241 longpiptr = position(wordv[2],'|') > (6+8); 242 nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1); 243 nwordv[0] = strsave(currentfilename); 244 nwordv[1] = strsave(c_linenumber); 245 if (!longpiptr){ 246 nwordv[2] = "pascal errortype"; 247 nwordv[3] = wordv[1]; 248 nwordv[4] = strsave("%%%\n"); 249 if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */ 250 nwordv[5] += (8-2); /* bump over 6 characters */ 251 } 252 wordv = nwordv - 1; /* convert to 1 based */ 253 wordc += longpiptr ? 2 : 4; 254 return(C_TRUE); 255 } 256 if ( (wordc >= 4) 257 && (strlen(wordv[1]) == 1) 258 && ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') ) 259 && (alldigits(wordv[2])) 260 && (strlen(wordv[3]) == 1) 261 && (wordv[3][0] == '-') 262 ){ 263 /* 264 * Message of the form: letter linenumber - message 265 * Turn into form: filename linenumber letter - message 266 */ 267 language = INPI; 268 nwordv = wordvsplice(1, wordc, wordv + 1); 269 nwordv[0] = strsave(currentfilename); 270 nwordv[1] = wordv[2]; 271 nwordv[2] = wordv[1]; 272 c_linenumber = wordv[2]; 273 wordc += 1; 274 wordv = nwordv - 1; 275 return(C_TRUE); 276 } 277 if ( (wordc >= 3) 278 && (strlen(wordv[1]) == 1) 279 && ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') ) 280 && (strlen(wordv[2]) == 1) 281 && (wordv[2][0] == '-') 282 ) { 283 /* 284 * Message of the form: letter - message 285 * This happens only when we are traversing the tree 286 * during the second pass of pi, and discover semantic 287 * errors. 288 * 289 * We have already (presumably) saved the header message 290 * and can now construct a nulled error message for the 291 * current file. 292 * 293 * Turns into a message of the form: 294 * filename (header) letter - message 295 * 296 * First, see if it is a message referring to more than 297 * one line number. Only of the form: 298 * %s undefined on line%s 299 * %s improperly used on line%s 300 */ 301 boolean undefined = 0; 302 int wordindex; 303 304 language = INPI; 305 if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) ) 306 || (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) ) 307 || (wordvcmp(wordv+2, 4, pi_imp1) == 0) 308 || (wordvcmp(wordv+2, 4, pi_imp2) == 0) 309 ){ 310 for (wordindex = undefined ? 5 : 6; wordindex <= wordc; 311 wordindex++){ 312 nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1); 313 nwordv[0] = strsave(currentfilename); 314 nwordv[1] = wordv[wordindex]; 315 if (wordindex != wordc) 316 erroradd(undefined ? 4 : 5, nwordv, 317 C_TRUE, C_UNKNOWN); 318 } 319 wordc = undefined ? 4 : 5; 320 wordv = nwordv - 1; 321 return(C_TRUE); 322 } 323 324 nwordv = wordvsplice(1+3, wordc, wordv+1); 325 nwordv[0] = strsave(currentfilename); 326 nwordv[1] = strsave(c_header[0]); 327 nwordv[2] = strsave(c_header[1]); 328 nwordv[3] = strsave(c_header[2]); 329 wordv = nwordv - 1; 330 wordc += 1 + 3; 331 return(C_THISFILE); 332 } 333 if (strcmp(wordv[1], "...") == 0){ 334 /* 335 * have a continuation error message 336 * of the form: ... message 337 * Turn into form : filename linenumber message 338 */ 339 language = INPI; 340 nwordv = wordvsplice(1, wordc, wordv+1); 341 nwordv[0] = strsave(currentfilename); 342 nwordv[1] = strsave(c_linenumber); 343 wordv = nwordv - 1; 344 wordc += 1; 345 return(C_TRUE); 346 } 347 if( (wordc == 6) 348 && (lastchar(wordv[6]) == ':') 349 && (isdateformat(5, wordv + 1)) 350 ){ 351 /* 352 * Have message that tells us we have changed files 353 */ 354 language = INPI; 355 currentfilename = strsave(wordv[6]); 356 clob_last(currentfilename, '\0'); 357 return(C_SYNC); 358 } 359 if( (wordc == 3) 360 && (strcmp(wordv[1], "In") == 0) 361 && (lastchar(wordv[3]) == ':') 362 && (instringset(wordv[2], Piroutines)) 363 ) { 364 language = INPI; 365 c_header = wordvsplice(0, wordc, wordv+1); 366 return(C_SYNC); 367 } 368 /* 369 * now, check for just the line number followed by the text 370 */ 371 if (alldigits(wordv[1])){ 372 language = INPI; 373 c_linenumber = wordv[1]; 374 return(C_IGNORE); 375 } 376 /* 377 * Attempt to match messages refering to a line number 378 * 379 * Multiply defined label in case, lines %d and %d 380 * Goto %s from line %d is into a structured statement 381 * End matched %s on line %d 382 * Inserted keyword end matching %s on line %d 383 */ 384 multiple = structured = 0; 385 if ( 386 ( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0)) 387 || ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0)) 388 || ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) ) 389 || ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) )) 390 ){ 391 language = INPI; 392 nwordv = wordvsplice(2, wordc, wordv+1); 393 nwordv[0] = strsave(currentfilename); 394 nwordv[1] = structured ? wordv [5] : wordv[wordc]; 395 wordc += 2; 396 wordv = nwordv - 1; 397 if (!multiple) 398 return(C_TRUE); 399 erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN); 400 nwordv = wordvsplice(0, wordc, nwordv); 401 nwordv[1] = wordv[wordc - 2]; 402 return(C_TRUE); 403 } 404 return(C_UNKNOWN); 405 } 406