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 are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #ifndef lint 19 static char sccsid[] = "@(#)pi.c 5.3 (Berkeley) 06/29/88"; 20 #endif /* not lint */ 21 22 #include <stdio.h> 23 #include <ctype.h> 24 #include "error.h" 25 26 extern char *currentfilename; 27 static char *c_linenumber; 28 static char *unk_hdr[] = {"In", "program", "???"}; 29 static char **c_header = &unk_hdr[0]; 30 31 /* 32 * Attempt to handle error messages produced by pi (and by pc) 33 * 34 * problem #1: There is no file name available when a file does not 35 * use a #include; this will have to be given to error 36 * in the command line. 37 * problem #2: pi doesn't always tell you what line number 38 * a error refers to; for example during the tree 39 * walk phase of code generation and error detection, 40 * an error can refer to "variable foo in procedure bletch" 41 * without giving a line number 42 * problem #3: line numbers, when available, are attached to 43 * the source line, along with the source line itself 44 * These line numbers must be extracted, and 45 * the source line thrown away. 46 * problem #4: Some error messages produce more than one line number 47 * on the same message. 48 * There are only two (I think): 49 * %s undefined on line%s 50 * %s improperly used on line%s 51 * here, the %s makes line plural or singular. 52 * 53 * Here are the error strings used in pi version 1.2 that can refer 54 * to a file name or line number: 55 * 56 * Multiply defined label in case, lines %d and %d 57 * Goto %s from line %d is into a structured statement 58 * End matched %s on line %d 59 * Inserted keyword end matching %s on line %d 60 * 61 * Here are the general pi patterns recognized: 62 * define piptr == -.*^-.* 63 * define msg = .* 64 * define digit = [0-9] 65 * definename = .* 66 * define date_format letter*3 letter*3 (digit | (digit digit)) 67 * (digit | (digit digit)):digit*2 digit*4 68 * 69 * {e,E} (piptr) (msg) Encounter an error during textual scan 70 * E {digit}* - (msg) Have an error message that refers to a new line 71 * E - msg Have an error message that refers to current 72 * function, program or procedure 73 * (date_format) (name): When switch compilation files 74 * ... (msg) When refer to the previous line 75 * 'In' ('procedure'|'function'|'program') (name): 76 * pi is now complaining about 2nd pass errors. 77 * 78 * Here is the output from a compilation 79 * 80 * 81 * 2 var i:integer; 82 * e --------------^--- Inserted ';' 83 * E 2 - All variables must be declared in one var part 84 * E 5 - Include filename must end in .i 85 * Mon Apr 21 15:56 1980 test.h: 86 * 2 begin 87 * e ------^--- Inserted ';' 88 * Mon Apr 21 16:06 1980 test.p: 89 * E 2 - Function type must be specified 90 * 6 procedure foo(var x:real); 91 * e ------^--- Inserted ';' 92 * In function bletch: 93 * E - No assignment to the function variable 94 * w - variable x is never used 95 * E 6 - foo is already defined in this block 96 * In procedure foo: 97 * w - variable x is neither used nor set 98 * 9 z : = 23; 99 * E --------------^--- Undefined variable 100 * 10 y = [1]; 101 * e ----------------^--- Inserted ':' 102 * 13 z := 345.; 103 * e -----------------------^--- Digits required after decimal point 104 * E 10 - Constant set involved in non set context 105 * E 11 - Type clash: real is incompatible with integer 106 * ... Type of expression clashed with type of variable in assignment 107 * E 12 - Parameter type not identical to type of var parameter x of foo 108 * In program mung: 109 * w - variable y is never used 110 * w - type foo is never used 111 * w - function bletch is never used 112 * E - z undefined on lines 9 13 113 */ 114 char *Months[] = { 115 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 116 "Jul", "Aug", "Sep", "Oct","Nov", "Dec", 117 0 118 }; 119 char *Days[] = { 120 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0 121 }; 122 char *Piroutines[] = { 123 "program", "function", "procedure", 0 124 }; 125 126 127 static boolean structured, multiple; 128 129 char *pi_Endmatched[] = {"End", "matched"}; 130 char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"}; 131 132 char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"}; 133 char *pi_structured[] = {"is", "into", "a", "structured", "statement"}; 134 135 char *pi_und1[] = {"undefined", "on", "line"}; 136 char *pi_und2[] = {"undefined", "on", "lines"}; 137 char *pi_imp1[] = {"improperly", "used", "on", "line"}; 138 char *pi_imp2[] = {"improperly", "used", "on", "lines"}; 139 140 boolean alldigits(string) 141 reg char *string; 142 { 143 for (; *string && isdigit(*string); string++) 144 continue; 145 return(*string == '\0'); 146 } 147 boolean instringset(member, set) 148 char *member; 149 reg char **set; 150 { 151 for(; *set; set++){ 152 if (strcmp(*set, member) == 0) 153 return(TRUE); 154 } 155 return(FALSE); 156 } 157 158 boolean isdateformat(wordc, wordv) 159 int wordc; 160 char **wordv; 161 { 162 return( 163 (wordc == 5) 164 && (instringset(wordv[0], Days)) 165 && (instringset(wordv[1], Months)) 166 && (alldigits(wordv[2])) 167 && (alldigits(wordv[4])) ); 168 } 169 170 boolean piptr(string) 171 reg char *string; 172 { 173 if (*string != '-') 174 return(FALSE); 175 while (*string && *string == '-') 176 string++; 177 if (*string != '^') 178 return(FALSE); 179 string++; 180 while (*string && *string == '-') 181 string++; 182 return(*string == '\0'); 183 } 184 185 extern int wordc; 186 extern char **wordv; 187 188 Errorclass pi() 189 { 190 char **nwordv; 191 192 if (wordc < 2) 193 return (C_UNKNOWN); 194 if ( ( strlen(wordv[1]) == 1) 195 && ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') ) 196 && ( piptr(wordv[2]) ) 197 ) { 198 boolean longpiptr = 0; 199 /* 200 * We have recognized a first pass error of the form: 201 * letter ------^---- message 202 * 203 * turn into an error message of the form: 204 * 205 * file line 'pascal errortype' letter \n |---- message 206 * or of the form: 207 * file line letter |---- message 208 * when there are strlen("(*[pi]") or more 209 * preceding '-' on the error pointer. 210 * 211 * Where the | is intended to be a down arrow, so that 212 * the pi error messages can be inserted above the 213 * line in error, instead of below. (All of the other 214 * langauges put thier messages before the source line, 215 * instead of after it as does pi.) 216 * 217 * where the pointer to the error has been truncated 218 * by 6 characters to account for the fact that 219 * the pointer points into a tab preceded input line. 220 */ 221 language = INPI; 222 (void)substitute(wordv[2], '^', '|'); 223 longpiptr = position(wordv[2],'|') > (6+8); 224 nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1); 225 nwordv[0] = strsave(currentfilename); 226 nwordv[1] = strsave(c_linenumber); 227 if (!longpiptr){ 228 nwordv[2] = "pascal errortype"; 229 nwordv[3] = wordv[1]; 230 nwordv[4] = strsave("%%%\n"); 231 if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */ 232 nwordv[5] += (8-2); /* bump over 6 characters */ 233 } 234 wordv = nwordv - 1; /* convert to 1 based */ 235 wordc += longpiptr ? 2 : 4; 236 return(C_TRUE); 237 } 238 if ( (wordc >= 4) 239 && (strlen(wordv[1]) == 1) 240 && ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') ) 241 && (alldigits(wordv[2])) 242 && (strlen(wordv[3]) == 1) 243 && (wordv[3][0] == '-') 244 ){ 245 /* 246 * Message of the form: letter linenumber - message 247 * Turn into form: filename linenumber letter - message 248 */ 249 language = INPI; 250 nwordv = wordvsplice(1, wordc, wordv + 1); 251 nwordv[0] = strsave(currentfilename); 252 nwordv[1] = wordv[2]; 253 nwordv[2] = wordv[1]; 254 c_linenumber = wordv[2]; 255 wordc += 1; 256 wordv = nwordv - 1; 257 return(C_TRUE); 258 } 259 if ( (wordc >= 3) 260 && (strlen(wordv[1]) == 1) 261 && ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') ) 262 && (strlen(wordv[2]) == 1) 263 && (wordv[2][0] == '-') 264 ) { 265 /* 266 * Message of the form: letter - message 267 * This happens only when we are traversing the tree 268 * during the second pass of pi, and discover semantic 269 * errors. 270 * 271 * We have already (presumably) saved the header message 272 * and can now construct a nulled error message for the 273 * current file. 274 * 275 * Turns into a message of the form: 276 * filename (header) letter - message 277 * 278 * First, see if it is a message referring to more than 279 * one line number. Only of the form: 280 * %s undefined on line%s 281 * %s improperly used on line%s 282 */ 283 boolean undefined = 0; 284 int wordindex; 285 286 language = INPI; 287 if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) ) 288 || (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) ) 289 || (wordvcmp(wordv+2, 4, pi_imp1) == 0) 290 || (wordvcmp(wordv+2, 4, pi_imp2) == 0) 291 ){ 292 for (wordindex = undefined ? 5 : 6; wordindex <= wordc; 293 wordindex++){ 294 nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1); 295 nwordv[0] = strsave(currentfilename); 296 nwordv[1] = wordv[wordindex]; 297 if (wordindex != wordc) 298 erroradd(undefined ? 4 : 5, nwordv, 299 C_TRUE, C_UNKNOWN); 300 } 301 wordc = undefined ? 4 : 5; 302 wordv = nwordv - 1; 303 return(C_TRUE); 304 } 305 306 nwordv = wordvsplice(1+3, wordc, wordv+1); 307 nwordv[0] = strsave(currentfilename); 308 nwordv[1] = strsave(c_header[0]); 309 nwordv[2] = strsave(c_header[1]); 310 nwordv[3] = strsave(c_header[2]); 311 wordv = nwordv - 1; 312 wordc += 1 + 3; 313 return(C_THISFILE); 314 } 315 if (strcmp(wordv[1], "...") == 0){ 316 /* 317 * have a continuation error message 318 * of the form: ... message 319 * Turn into form : filename linenumber message 320 */ 321 language = INPI; 322 nwordv = wordvsplice(1, wordc, wordv+1); 323 nwordv[0] = strsave(currentfilename); 324 nwordv[1] = strsave(c_linenumber); 325 wordv = nwordv - 1; 326 wordc += 1; 327 return(C_TRUE); 328 } 329 if( (wordc == 6) 330 && (lastchar(wordv[6]) == ':') 331 && (isdateformat(5, wordv + 1)) 332 ){ 333 /* 334 * Have message that tells us we have changed files 335 */ 336 language = INPI; 337 currentfilename = strsave(wordv[6]); 338 clob_last(currentfilename, '\0'); 339 return(C_SYNC); 340 } 341 if( (wordc == 3) 342 && (strcmp(wordv[1], "In") == 0) 343 && (lastchar(wordv[3]) == ':') 344 && (instringset(wordv[2], Piroutines)) 345 ) { 346 language = INPI; 347 c_header = wordvsplice(0, wordc, wordv+1); 348 return(C_SYNC); 349 } 350 /* 351 * now, check for just the line number followed by the text 352 */ 353 if (alldigits(wordv[1])){ 354 language = INPI; 355 c_linenumber = wordv[1]; 356 return(C_IGNORE); 357 } 358 /* 359 * Attempt to match messages refering to a line number 360 * 361 * Multiply defined label in case, lines %d and %d 362 * Goto %s from line %d is into a structured statement 363 * End matched %s on line %d 364 * Inserted keyword end matching %s on line %d 365 */ 366 multiple = structured = 0; 367 if ( 368 ( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0)) 369 || ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0)) 370 || ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) ) 371 || ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) )) 372 ){ 373 language = INPI; 374 nwordv = wordvsplice(2, wordc, wordv+1); 375 nwordv[0] = strsave(currentfilename); 376 nwordv[1] = structured ? wordv [5] : wordv[wordc]; 377 wordc += 2; 378 wordv = nwordv - 1; 379 if (!multiple) 380 return(C_TRUE); 381 erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN); 382 nwordv = wordvsplice(0, wordc, nwordv); 383 nwordv[1] = wordv[wordc - 2]; 384 return(C_TRUE); 385 } 386 return(C_UNKNOWN); 387 } 388