pi.c revision 1.3
1 /* $NetBSD: pi.c,v 1.3 1995/09/02 06:15:44 jtc 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 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)pi.c 8.1 (Berkeley) 6/6/93"; 39 #endif 40 static char rcsid[] = "$NetBSD: pi.c,v 1.3 1995/09/02 06:15:44 jtc Exp $"; 41 #endif /* not lint */ 42 43 #include <stdio.h> 44 #include <ctype.h> 45 #include <string.h> 46 #include "error.h" 47 48 extern char *currentfilename; 49 static char *c_linenumber; 50 static char *unk_hdr[] = {"In", "program", "???"}; 51 static char **c_header = &unk_hdr[0]; 52 53 /* 54 * Attempt to handle error messages produced by pi (and by pc) 55 * 56 * problem #1: There is no file name available when a file does not 57 * use a #include; this will have to be given to error 58 * in the command line. 59 * problem #2: pi doesn't always tell you what line number 60 * a error refers to; for example during the tree 61 * walk phase of code generation and error detection, 62 * an error can refer to "variable foo in procedure bletch" 63 * without giving a line number 64 * problem #3: line numbers, when available, are attached to 65 * the source line, along with the source line itself 66 * These line numbers must be extracted, and 67 * the source line thrown away. 68 * problem #4: Some error messages produce more than one line number 69 * on the same message. 70 * There are only two (I think): 71 * %s undefined on line%s 72 * %s improperly used on line%s 73 * here, the %s makes line plural or singular. 74 * 75 * Here are the error strings used in pi version 1.2 that can refer 76 * to a file name or line number: 77 * 78 * Multiply defined label in case, lines %d and %d 79 * Goto %s from line %d is into a structured statement 80 * End matched %s on line %d 81 * Inserted keyword end matching %s on line %d 82 * 83 * Here are the general pi patterns recognized: 84 * define piptr == -.*^-.* 85 * define msg = .* 86 * define digit = [0-9] 87 * definename = .* 88 * define date_format letter*3 letter*3 (digit | (digit digit)) 89 * (digit | (digit digit)):digit*2 digit*4 90 * 91 * {e,E} (piptr) (msg) Encounter an error during textual scan 92 * E {digit}* - (msg) Have an error message that refers to a new line 93 * E - msg Have an error message that refers to current 94 * function, program or procedure 95 * (date_format) (name): When switch compilation files 96 * ... (msg) When refer to the previous line 97 * 'In' ('procedure'|'function'|'program') (name): 98 * pi is now complaining about 2nd pass errors. 99 * 100 * Here is the output from a compilation 101 * 102 * 103 * 2 var i:integer; 104 * e --------------^--- Inserted ';' 105 * E 2 - All variables must be declared in one var part 106 * E 5 - Include filename must end in .i 107 * Mon Apr 21 15:56 1980 test.h: 108 * 2 begin 109 * e ------^--- Inserted ';' 110 * Mon Apr 21 16:06 1980 test.p: 111 * E 2 - Function type must be specified 112 * 6 procedure foo(var x:real); 113 * e ------^--- Inserted ';' 114 * In function bletch: 115 * E - No assignment to the function variable 116 * w - variable x is never used 117 * E 6 - foo is already defined in this block 118 * In procedure foo: 119 * w - variable x is neither used nor set 120 * 9 z : = 23; 121 * E --------------^--- Undefined variable 122 * 10 y = [1]; 123 * e ----------------^--- Inserted ':' 124 * 13 z := 345.; 125 * e -----------------------^--- Digits required after decimal point 126 * E 10 - Constant set involved in non set context 127 * E 11 - Type clash: real is incompatible with integer 128 * ... Type of expression clashed with type of variable in assignment 129 * E 12 - Parameter type not identical to type of var parameter x of foo 130 * In program mung: 131 * w - variable y is never used 132 * w - type foo is never used 133 * w - function bletch is never used 134 * E - z undefined on lines 9 13 135 */ 136 char *Months[] = { 137 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 138 "Jul", "Aug", "Sep", "Oct","Nov", "Dec", 139 0 140 }; 141 char *Days[] = { 142 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0 143 }; 144 char *Piroutines[] = { 145 "program", "function", "procedure", 0 146 }; 147 148 149 static boolean structured, multiple; 150 151 char *pi_Endmatched[] = {"End", "matched"}; 152 char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"}; 153 154 char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"}; 155 char *pi_structured[] = {"is", "into", "a", "structured", "statement"}; 156 157 char *pi_und1[] = {"undefined", "on", "line"}; 158 char *pi_und2[] = {"undefined", "on", "lines"}; 159 char *pi_imp1[] = {"improperly", "used", "on", "line"}; 160 char *pi_imp2[] = {"improperly", "used", "on", "lines"}; 161 162 boolean alldigits(string) 163 reg char *string; 164 { 165 for (; *string && isdigit(*string); string++) 166 continue; 167 return(*string == '\0'); 168 } 169 boolean instringset(member, set) 170 char *member; 171 reg char **set; 172 { 173 for(; *set; set++){ 174 if (strcmp(*set, member) == 0) 175 return(TRUE); 176 } 177 return(FALSE); 178 } 179 180 boolean isdateformat(wordc, wordv) 181 int wordc; 182 char **wordv; 183 { 184 return( 185 (wordc == 5) 186 && (instringset(wordv[0], Days)) 187 && (instringset(wordv[1], Months)) 188 && (alldigits(wordv[2])) 189 && (alldigits(wordv[4])) ); 190 } 191 192 boolean piptr(string) 193 reg char *string; 194 { 195 if (*string != '-') 196 return(FALSE); 197 while (*string && *string == '-') 198 string++; 199 if (*string != '^') 200 return(FALSE); 201 string++; 202 while (*string && *string == '-') 203 string++; 204 return(*string == '\0'); 205 } 206 207 extern int wordc; 208 extern char **wordv; 209 210 Errorclass pi() 211 { 212 char **nwordv; 213 214 if (wordc < 2) 215 return (C_UNKNOWN); 216 if ( ( strlen(wordv[1]) == 1) 217 && ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') ) 218 && ( piptr(wordv[2]) ) 219 ) { 220 boolean longpiptr = 0; 221 /* 222 * We have recognized a first pass error of the form: 223 * letter ------^---- message 224 * 225 * turn into an error message of the form: 226 * 227 * file line 'pascal errortype' letter \n |---- message 228 * or of the form: 229 * file line letter |---- message 230 * when there are strlen("(*[pi]") or more 231 * preceding '-' on the error pointer. 232 * 233 * Where the | is intended to be a down arrow, so that 234 * the pi error messages can be inserted above the 235 * line in error, instead of below. (All of the other 236 * langauges put thier messages before the source line, 237 * instead of after it as does pi.) 238 * 239 * where the pointer to the error has been truncated 240 * by 6 characters to account for the fact that 241 * the pointer points into a tab preceded input line. 242 */ 243 language = INPI; 244 (void)substitute(wordv[2], '^', '|'); 245 longpiptr = position(wordv[2],'|') > (6+8); 246 nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1); 247 nwordv[0] = strsave(currentfilename); 248 nwordv[1] = strsave(c_linenumber); 249 if (!longpiptr){ 250 nwordv[2] = "pascal errortype"; 251 nwordv[3] = wordv[1]; 252 nwordv[4] = strsave("%%%\n"); 253 if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */ 254 nwordv[5] += (8-2); /* bump over 6 characters */ 255 } 256 wordv = nwordv - 1; /* convert to 1 based */ 257 wordc += longpiptr ? 2 : 4; 258 return(C_TRUE); 259 } 260 if ( (wordc >= 4) 261 && (strlen(wordv[1]) == 1) 262 && ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') ) 263 && (alldigits(wordv[2])) 264 && (strlen(wordv[3]) == 1) 265 && (wordv[3][0] == '-') 266 ){ 267 /* 268 * Message of the form: letter linenumber - message 269 * Turn into form: filename linenumber letter - message 270 */ 271 language = INPI; 272 nwordv = wordvsplice(1, wordc, wordv + 1); 273 nwordv[0] = strsave(currentfilename); 274 nwordv[1] = wordv[2]; 275 nwordv[2] = wordv[1]; 276 c_linenumber = wordv[2]; 277 wordc += 1; 278 wordv = nwordv - 1; 279 return(C_TRUE); 280 } 281 if ( (wordc >= 3) 282 && (strlen(wordv[1]) == 1) 283 && ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') ) 284 && (strlen(wordv[2]) == 1) 285 && (wordv[2][0] == '-') 286 ) { 287 /* 288 * Message of the form: letter - message 289 * This happens only when we are traversing the tree 290 * during the second pass of pi, and discover semantic 291 * errors. 292 * 293 * We have already (presumably) saved the header message 294 * and can now construct a nulled error message for the 295 * current file. 296 * 297 * Turns into a message of the form: 298 * filename (header) letter - message 299 * 300 * First, see if it is a message referring to more than 301 * one line number. Only of the form: 302 * %s undefined on line%s 303 * %s improperly used on line%s 304 */ 305 boolean undefined = 0; 306 int wordindex; 307 308 language = INPI; 309 if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) ) 310 || (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) ) 311 || (wordvcmp(wordv+2, 4, pi_imp1) == 0) 312 || (wordvcmp(wordv+2, 4, pi_imp2) == 0) 313 ){ 314 for (wordindex = undefined ? 5 : 6; wordindex <= wordc; 315 wordindex++){ 316 nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1); 317 nwordv[0] = strsave(currentfilename); 318 nwordv[1] = wordv[wordindex]; 319 if (wordindex != wordc) 320 erroradd(undefined ? 4 : 5, nwordv, 321 C_TRUE, C_UNKNOWN); 322 } 323 wordc = undefined ? 4 : 5; 324 wordv = nwordv - 1; 325 return(C_TRUE); 326 } 327 328 nwordv = wordvsplice(1+3, wordc, wordv+1); 329 nwordv[0] = strsave(currentfilename); 330 nwordv[1] = strsave(c_header[0]); 331 nwordv[2] = strsave(c_header[1]); 332 nwordv[3] = strsave(c_header[2]); 333 wordv = nwordv - 1; 334 wordc += 1 + 3; 335 return(C_THISFILE); 336 } 337 if (strcmp(wordv[1], "...") == 0){ 338 /* 339 * have a continuation error message 340 * of the form: ... message 341 * Turn into form : filename linenumber message 342 */ 343 language = INPI; 344 nwordv = wordvsplice(1, wordc, wordv+1); 345 nwordv[0] = strsave(currentfilename); 346 nwordv[1] = strsave(c_linenumber); 347 wordv = nwordv - 1; 348 wordc += 1; 349 return(C_TRUE); 350 } 351 if( (wordc == 6) 352 && (lastchar(wordv[6]) == ':') 353 && (isdateformat(5, wordv + 1)) 354 ){ 355 /* 356 * Have message that tells us we have changed files 357 */ 358 language = INPI; 359 currentfilename = strsave(wordv[6]); 360 clob_last(currentfilename, '\0'); 361 return(C_SYNC); 362 } 363 if( (wordc == 3) 364 && (strcmp(wordv[1], "In") == 0) 365 && (lastchar(wordv[3]) == ':') 366 && (instringset(wordv[2], Piroutines)) 367 ) { 368 language = INPI; 369 c_header = wordvsplice(0, wordc, wordv+1); 370 return(C_SYNC); 371 } 372 /* 373 * now, check for just the line number followed by the text 374 */ 375 if (alldigits(wordv[1])){ 376 language = INPI; 377 c_linenumber = wordv[1]; 378 return(C_IGNORE); 379 } 380 /* 381 * Attempt to match messages refering to a line number 382 * 383 * Multiply defined label in case, lines %d and %d 384 * Goto %s from line %d is into a structured statement 385 * End matched %s on line %d 386 * Inserted keyword end matching %s on line %d 387 */ 388 multiple = structured = 0; 389 if ( 390 ( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0)) 391 || ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0)) 392 || ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) ) 393 || ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) )) 394 ){ 395 language = INPI; 396 nwordv = wordvsplice(2, wordc, wordv+1); 397 nwordv[0] = strsave(currentfilename); 398 nwordv[1] = structured ? wordv [5] : wordv[wordc]; 399 wordc += 2; 400 wordv = nwordv - 1; 401 if (!multiple) 402 return(C_TRUE); 403 erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN); 404 nwordv = wordvsplice(0, wordc, nwordv); 405 nwordv[1] = wordv[wordc - 2]; 406 return(C_TRUE); 407 } 408 return(C_UNKNOWN); 409 } 410
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