pi.c revision 1.4
1 /* $NetBSD: pi.c,v 1.4 1997/10/18 14:44:37 lukem 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 1.4 1997/10/18 14:44:37 lukem Exp $"); 42 #endif /* not lint */ 43 44 #include <stdio.h> 45 #include <ctype.h> 46 #include <string.h> 47 #include "error.h" 48 49 extern char *currentfilename; 50 static char *c_linenumber; 51 static char *unk_hdr[] = {"In", "program", "???"}; 52 static char **c_header = &unk_hdr[0]; 53 54 boolean alldigits __P((char *)); 55 boolean isdateformat __P((int, char **)); 56 boolean instringset __P((char *, char **)); 57 Errorclass pi __P((void)); 58 boolean piptr __P((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 char *Months[] = { 145 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 146 "Jul", "Aug", "Sep", "Oct","Nov", "Dec", 147 0 148 }; 149 char *Days[] = { 150 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0 151 }; 152 char *Piroutines[] = { 153 "program", "function", "procedure", 0 154 }; 155 156 157 static boolean structured, multiple; 158 159 char *pi_Endmatched[] = {"End", "matched"}; 160 char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"}; 161 162 char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"}; 163 char *pi_structured[] = {"is", "into", "a", "structured", "statement"}; 164 165 char *pi_und1[] = {"undefined", "on", "line"}; 166 char *pi_und2[] = {"undefined", "on", "lines"}; 167 char *pi_imp1[] = {"improperly", "used", "on", "line"}; 168 char *pi_imp2[] = {"improperly", "used", "on", "lines"}; 169 170 boolean 171 alldigits(string) 172 char *string; 173 { 174 for (; *string && isdigit(*string); string++) 175 continue; 176 return(*string == '\0'); 177 } 178 179 boolean 180 instringset(member, set) 181 char *member; 182 char **set; 183 { 184 for(; *set; set++){ 185 if (strcmp(*set, member) == 0) 186 return(TRUE); 187 } 188 return(FALSE); 189 } 190 191 boolean 192 isdateformat(wordc, wordv) 193 int wordc; 194 char **wordv; 195 { 196 return( 197 (wordc == 5) 198 && (instringset(wordv[0], Days)) 199 && (instringset(wordv[1], Months)) 200 && (alldigits(wordv[2])) 201 && (alldigits(wordv[4])) ); 202 } 203 204 boolean 205 piptr(string) 206 char *string; 207 { 208 if (*string != '-') 209 return(FALSE); 210 while (*string && *string == '-') 211 string++; 212 if (*string != '^') 213 return(FALSE); 214 string++; 215 while (*string && *string == '-') 216 string++; 217 return(*string == '\0'); 218 } 219 220 extern int wordc; 221 extern char **wordv; 222 223 Errorclass 224 pi() 225 { 226 char **nwordv; 227 228 nwordv = NULL; 229 if (wordc < 2) 230 return (C_UNKNOWN); 231 if ( ( strlen(wordv[1]) == 1) 232 && ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') ) 233 && ( piptr(wordv[2]) ) 234 ) { 235 boolean longpiptr = 0; 236 /* 237 * We have recognized a first pass error of the form: 238 * letter ------^---- message 239 * 240 * turn into an error message of the form: 241 * 242 * file line 'pascal errortype' letter \n |---- message 243 * or of the form: 244 * file line letter |---- message 245 * when there are strlen("(*[pi]") or more 246 * preceding '-' on the error pointer. 247 * 248 * Where the | is intended to be a down arrow, so that 249 * the pi error messages can be inserted above the 250 * line in error, instead of below. (All of the other 251 * langauges put thier messages before the source line, 252 * instead of after it as does pi.) 253 * 254 * where the pointer to the error has been truncated 255 * by 6 characters to account for the fact that 256 * the pointer points into a tab preceded input line. 257 */ 258 language = INPI; 259 (void)substitute(wordv[2], '^', '|'); 260 longpiptr = position(wordv[2],'|') > (6+8); 261 nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1); 262 nwordv[0] = strsave(currentfilename); 263 nwordv[1] = strsave(c_linenumber); 264 if (!longpiptr){ 265 nwordv[2] = "pascal errortype"; 266 nwordv[3] = wordv[1]; 267 nwordv[4] = strsave("%%%\n"); 268 if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */ 269 nwordv[5] += (8-2); /* bump over 6 characters */ 270 } 271 wordv = nwordv - 1; /* convert to 1 based */ 272 wordc += longpiptr ? 2 : 4; 273 return(C_TRUE); 274 } 275 if ( (wordc >= 4) 276 && (strlen(wordv[1]) == 1) 277 && ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') ) 278 && (alldigits(wordv[2])) 279 && (strlen(wordv[3]) == 1) 280 && (wordv[3][0] == '-') 281 ){ 282 /* 283 * Message of the form: letter linenumber - message 284 * Turn into form: filename linenumber letter - message 285 */ 286 language = INPI; 287 nwordv = wordvsplice(1, wordc, wordv + 1); 288 nwordv[0] = strsave(currentfilename); 289 nwordv[1] = wordv[2]; 290 nwordv[2] = wordv[1]; 291 c_linenumber = wordv[2]; 292 wordc += 1; 293 wordv = nwordv - 1; 294 return(C_TRUE); 295 } 296 if ( (wordc >= 3) 297 && (strlen(wordv[1]) == 1) 298 && ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') ) 299 && (strlen(wordv[2]) == 1) 300 && (wordv[2][0] == '-') 301 ) { 302 /* 303 * Message of the form: letter - message 304 * This happens only when we are traversing the tree 305 * during the second pass of pi, and discover semantic 306 * errors. 307 * 308 * We have already (presumably) saved the header message 309 * and can now construct a nulled error message for the 310 * current file. 311 * 312 * Turns into a message of the form: 313 * filename (header) letter - message 314 * 315 * First, see if it is a message referring to more than 316 * one line number. Only of the form: 317 * %s undefined on line%s 318 * %s improperly used on line%s 319 */ 320 boolean undefined = 0; 321 int wordindex; 322 323 language = INPI; 324 if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) ) 325 || (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) ) 326 || (wordvcmp(wordv+2, 4, pi_imp1) == 0) 327 || (wordvcmp(wordv+2, 4, pi_imp2) == 0) 328 ){ 329 for (wordindex = undefined ? 5 : 6; wordindex <= wordc; 330 wordindex++){ 331 nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1); 332 nwordv[0] = strsave(currentfilename); 333 nwordv[1] = wordv[wordindex]; 334 if (wordindex != wordc) 335 erroradd(undefined ? 4 : 5, nwordv, 336 C_TRUE, C_UNKNOWN); 337 } 338 wordc = undefined ? 4 : 5; 339 wordv = nwordv - 1; 340 return(C_TRUE); 341 } 342 343 nwordv = wordvsplice(1+3, wordc, wordv+1); 344 nwordv[0] = strsave(currentfilename); 345 nwordv[1] = strsave(c_header[0]); 346 nwordv[2] = strsave(c_header[1]); 347 nwordv[3] = strsave(c_header[2]); 348 wordv = nwordv - 1; 349 wordc += 1 + 3; 350 return(C_THISFILE); 351 } 352 if (strcmp(wordv[1], "...") == 0){ 353 /* 354 * have a continuation error message 355 * of the form: ... message 356 * Turn into form : filename linenumber message 357 */ 358 language = INPI; 359 nwordv = wordvsplice(1, wordc, wordv+1); 360 nwordv[0] = strsave(currentfilename); 361 nwordv[1] = strsave(c_linenumber); 362 wordv = nwordv - 1; 363 wordc += 1; 364 return(C_TRUE); 365 } 366 if( (wordc == 6) 367 && (lastchar(wordv[6]) == ':') 368 && (isdateformat(5, wordv + 1)) 369 ){ 370 /* 371 * Have message that tells us we have changed files 372 */ 373 language = INPI; 374 currentfilename = strsave(wordv[6]); 375 clob_last(currentfilename, '\0'); 376 return(C_SYNC); 377 } 378 if( (wordc == 3) 379 && (strcmp(wordv[1], "In") == 0) 380 && (lastchar(wordv[3]) == ':') 381 && (instringset(wordv[2], Piroutines)) 382 ) { 383 language = INPI; 384 c_header = wordvsplice(0, wordc, wordv+1); 385 return(C_SYNC); 386 } 387 /* 388 * now, check for just the line number followed by the text 389 */ 390 if (alldigits(wordv[1])){ 391 language = INPI; 392 c_linenumber = wordv[1]; 393 return(C_IGNORE); 394 } 395 /* 396 * Attempt to match messages refering to a line number 397 * 398 * Multiply defined label in case, lines %d and %d 399 * Goto %s from line %d is into a structured statement 400 * End matched %s on line %d 401 * Inserted keyword end matching %s on line %d 402 */ 403 multiple = structured = 0; 404 if ( 405 ( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0)) 406 || ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0)) 407 || ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) ) 408 || ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) )) 409 ){ 410 language = INPI; 411 nwordv = wordvsplice(2, wordc, wordv+1); 412 nwordv[0] = strsave(currentfilename); 413 nwordv[1] = structured ? wordv [5] : wordv[wordc]; 414 wordc += 2; 415 wordv = nwordv - 1; 416 if (!multiple) 417 return(C_TRUE); 418 erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN); 419 nwordv = wordvsplice(0, wordc, nwordv); 420 nwordv[1] = wordv[wordc - 2]; 421 return(C_TRUE); 422 } 423 return(C_UNKNOWN); 424 } 425
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