pi.c revision 1.1
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[] = "@(#)pi.c 5.5 (Berkeley) 2/26/91"; 36 #endif /* not lint */ 37 38 #include <stdio.h> 39 #include <ctype.h> 40 #include <string.h> 41 #include "error.h" 42 43 extern char *currentfilename; 44 static char *c_linenumber; 45 static char *unk_hdr[] = {"In", "program", "???"}; 46 static char **c_header = &unk_hdr[0]; 47 48 /* 49 * Attempt to handle error messages produced by pi (and by pc) 50 * 51 * problem #1: There is no file name available when a file does not 52 * use a #include; this will have to be given to error 53 * in the command line. 54 * problem #2: pi doesn't always tell you what line number 55 * a error refers to; for example during the tree 56 * walk phase of code generation and error detection, 57 * an error can refer to "variable foo in procedure bletch" 58 * without giving a line number 59 * problem #3: line numbers, when available, are attached to 60 * the source line, along with the source line itself 61 * These line numbers must be extracted, and 62 * the source line thrown away. 63 * problem #4: Some error messages produce more than one line number 64 * on the same message. 65 * There are only two (I think): 66 * %s undefined on line%s 67 * %s improperly used on line%s 68 * here, the %s makes line plural or singular. 69 * 70 * Here are the error strings used in pi version 1.2 that can refer 71 * to a file name or line number: 72 * 73 * Multiply defined label in case, lines %d and %d 74 * Goto %s from line %d is into a structured statement 75 * End matched %s on line %d 76 * Inserted keyword end matching %s on line %d 77 * 78 * Here are the general pi patterns recognized: 79 * define piptr == -.*^-.* 80 * define msg = .* 81 * define digit = [0-9] 82 * definename = .* 83 * define date_format letter*3 letter*3 (digit | (digit digit)) 84 * (digit | (digit digit)):digit*2 digit*4 85 * 86 * {e,E} (piptr) (msg) Encounter an error during textual scan 87 * E {digit}* - (msg) Have an error message that refers to a new line 88 * E - msg Have an error message that refers to current 89 * function, program or procedure 90 * (date_format) (name): When switch compilation files 91 * ... (msg) When refer to the previous line 92 * 'In' ('procedure'|'function'|'program') (name): 93 * pi is now complaining about 2nd pass errors. 94 * 95 * Here is the output from a compilation 96 * 97 * 98 * 2 var i:integer; 99 * e --------------^--- Inserted ';' 100 * E 2 - All variables must be declared in one var part 101 * E 5 - Include filename must end in .i 102 * Mon Apr 21 15:56 1980 test.h: 103 * 2 begin 104 * e ------^--- Inserted ';' 105 * Mon Apr 21 16:06 1980 test.p: 106 * E 2 - Function type must be specified 107 * 6 procedure foo(var x:real); 108 * e ------^--- Inserted ';' 109 * In function bletch: 110 * E - No assignment to the function variable 111 * w - variable x is never used 112 * E 6 - foo is already defined in this block 113 * In procedure foo: 114 * w - variable x is neither used nor set 115 * 9 z : = 23; 116 * E --------------^--- Undefined variable 117 * 10 y = [1]; 118 * e ----------------^--- Inserted ':' 119 * 13 z := 345.; 120 * e -----------------------^--- Digits required after decimal point 121 * E 10 - Constant set involved in non set context 122 * E 11 - Type clash: real is incompatible with integer 123 * ... Type of expression clashed with type of variable in assignment 124 * E 12 - Parameter type not identical to type of var parameter x of foo 125 * In program mung: 126 * w - variable y is never used 127 * w - type foo is never used 128 * w - function bletch is never used 129 * E - z undefined on lines 9 13 130 */ 131 char *Months[] = { 132 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 133 "Jul", "Aug", "Sep", "Oct","Nov", "Dec", 134 0 135 }; 136 char *Days[] = { 137 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0 138 }; 139 char *Piroutines[] = { 140 "program", "function", "procedure", 0 141 }; 142 143 144 static boolean structured, multiple; 145 146 char *pi_Endmatched[] = {"End", "matched"}; 147 char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"}; 148 149 char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"}; 150 char *pi_structured[] = {"is", "into", "a", "structured", "statement"}; 151 152 char *pi_und1[] = {"undefined", "on", "line"}; 153 char *pi_und2[] = {"undefined", "on", "lines"}; 154 char *pi_imp1[] = {"improperly", "used", "on", "line"}; 155 char *pi_imp2[] = {"improperly", "used", "on", "lines"}; 156 157 boolean alldigits(string) 158 reg char *string; 159 { 160 for (; *string && isdigit(*string); string++) 161 continue; 162 return(*string == '\0'); 163 } 164 boolean instringset(member, set) 165 char *member; 166 reg char **set; 167 { 168 for(; *set; set++){ 169 if (strcmp(*set, member) == 0) 170 return(TRUE); 171 } 172 return(FALSE); 173 } 174 175 boolean isdateformat(wordc, wordv) 176 int wordc; 177 char **wordv; 178 { 179 return( 180 (wordc == 5) 181 && (instringset(wordv[0], Days)) 182 && (instringset(wordv[1], Months)) 183 && (alldigits(wordv[2])) 184 && (alldigits(wordv[4])) ); 185 } 186 187 boolean piptr(string) 188 reg char *string; 189 { 190 if (*string != '-') 191 return(FALSE); 192 while (*string && *string == '-') 193 string++; 194 if (*string != '^') 195 return(FALSE); 196 string++; 197 while (*string && *string == '-') 198 string++; 199 return(*string == '\0'); 200 } 201 202 extern int wordc; 203 extern char **wordv; 204 205 Errorclass pi() 206 { 207 char **nwordv; 208 209 if (wordc < 2) 210 return (C_UNKNOWN); 211 if ( ( strlen(wordv[1]) == 1) 212 && ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') ) 213 && ( piptr(wordv[2]) ) 214 ) { 215 boolean longpiptr = 0; 216 /* 217 * We have recognized a first pass error of the form: 218 * letter ------^---- message 219 * 220 * turn into an error message of the form: 221 * 222 * file line 'pascal errortype' letter \n |---- message 223 * or of the form: 224 * file line letter |---- message 225 * when there are strlen("(*[pi]") or more 226 * preceding '-' on the error pointer. 227 * 228 * Where the | is intended to be a down arrow, so that 229 * the pi error messages can be inserted above the 230 * line in error, instead of below. (All of the other 231 * langauges put thier messages before the source line, 232 * instead of after it as does pi.) 233 * 234 * where the pointer to the error has been truncated 235 * by 6 characters to account for the fact that 236 * the pointer points into a tab preceded input line. 237 */ 238 language = INPI; 239 (void)substitute(wordv[2], '^', '|'); 240 longpiptr = position(wordv[2],'|') > (6+8); 241 nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1); 242 nwordv[0] = strsave(currentfilename); 243 nwordv[1] = strsave(c_linenumber); 244 if (!longpiptr){ 245 nwordv[2] = "pascal errortype"; 246 nwordv[3] = wordv[1]; 247 nwordv[4] = strsave("%%%\n"); 248 if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */ 249 nwordv[5] += (8-2); /* bump over 6 characters */ 250 } 251 wordv = nwordv - 1; /* convert to 1 based */ 252 wordc += longpiptr ? 2 : 4; 253 return(C_TRUE); 254 } 255 if ( (wordc >= 4) 256 && (strlen(wordv[1]) == 1) 257 && ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') ) 258 && (alldigits(wordv[2])) 259 && (strlen(wordv[3]) == 1) 260 && (wordv[3][0] == '-') 261 ){ 262 /* 263 * Message of the form: letter linenumber - message 264 * Turn into form: filename linenumber letter - message 265 */ 266 language = INPI; 267 nwordv = wordvsplice(1, wordc, wordv + 1); 268 nwordv[0] = strsave(currentfilename); 269 nwordv[1] = wordv[2]; 270 nwordv[2] = wordv[1]; 271 c_linenumber = wordv[2]; 272 wordc += 1; 273 wordv = nwordv - 1; 274 return(C_TRUE); 275 } 276 if ( (wordc >= 3) 277 && (strlen(wordv[1]) == 1) 278 && ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') ) 279 && (strlen(wordv[2]) == 1) 280 && (wordv[2][0] == '-') 281 ) { 282 /* 283 * Message of the form: letter - message 284 * This happens only when we are traversing the tree 285 * during the second pass of pi, and discover semantic 286 * errors. 287 * 288 * We have already (presumably) saved the header message 289 * and can now construct a nulled error message for the 290 * current file. 291 * 292 * Turns into a message of the form: 293 * filename (header) letter - message 294 * 295 * First, see if it is a message referring to more than 296 * one line number. Only of the form: 297 * %s undefined on line%s 298 * %s improperly used on line%s 299 */ 300 boolean undefined = 0; 301 int wordindex; 302 303 language = INPI; 304 if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) ) 305 || (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) ) 306 || (wordvcmp(wordv+2, 4, pi_imp1) == 0) 307 || (wordvcmp(wordv+2, 4, pi_imp2) == 0) 308 ){ 309 for (wordindex = undefined ? 5 : 6; wordindex <= wordc; 310 wordindex++){ 311 nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1); 312 nwordv[0] = strsave(currentfilename); 313 nwordv[1] = wordv[wordindex]; 314 if (wordindex != wordc) 315 erroradd(undefined ? 4 : 5, nwordv, 316 C_TRUE, C_UNKNOWN); 317 } 318 wordc = undefined ? 4 : 5; 319 wordv = nwordv - 1; 320 return(C_TRUE); 321 } 322 323 nwordv = wordvsplice(1+3, wordc, wordv+1); 324 nwordv[0] = strsave(currentfilename); 325 nwordv[1] = strsave(c_header[0]); 326 nwordv[2] = strsave(c_header[1]); 327 nwordv[3] = strsave(c_header[2]); 328 wordv = nwordv - 1; 329 wordc += 1 + 3; 330 return(C_THISFILE); 331 } 332 if (strcmp(wordv[1], "...") == 0){ 333 /* 334 * have a continuation error message 335 * of the form: ... message 336 * Turn into form : filename linenumber message 337 */ 338 language = INPI; 339 nwordv = wordvsplice(1, wordc, wordv+1); 340 nwordv[0] = strsave(currentfilename); 341 nwordv[1] = strsave(c_linenumber); 342 wordv = nwordv - 1; 343 wordc += 1; 344 return(C_TRUE); 345 } 346 if( (wordc == 6) 347 && (lastchar(wordv[6]) == ':') 348 && (isdateformat(5, wordv + 1)) 349 ){ 350 /* 351 * Have message that tells us we have changed files 352 */ 353 language = INPI; 354 currentfilename = strsave(wordv[6]); 355 clob_last(currentfilename, '\0'); 356 return(C_SYNC); 357 } 358 if( (wordc == 3) 359 && (strcmp(wordv[1], "In") == 0) 360 && (lastchar(wordv[3]) == ':') 361 && (instringset(wordv[2], Piroutines)) 362 ) { 363 language = INPI; 364 c_header = wordvsplice(0, wordc, wordv+1); 365 return(C_SYNC); 366 } 367 /* 368 * now, check for just the line number followed by the text 369 */ 370 if (alldigits(wordv[1])){ 371 language = INPI; 372 c_linenumber = wordv[1]; 373 return(C_IGNORE); 374 } 375 /* 376 * Attempt to match messages refering to a line number 377 * 378 * Multiply defined label in case, lines %d and %d 379 * Goto %s from line %d is into a structured statement 380 * End matched %s on line %d 381 * Inserted keyword end matching %s on line %d 382 */ 383 multiple = structured = 0; 384 if ( 385 ( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0)) 386 || ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0)) 387 || ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) ) 388 || ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) )) 389 ){ 390 language = INPI; 391 nwordv = wordvsplice(2, wordc, wordv+1); 392 nwordv[0] = strsave(currentfilename); 393 nwordv[1] = structured ? wordv [5] : wordv[wordc]; 394 wordc += 2; 395 wordv = nwordv - 1; 396 if (!multiple) 397 return(C_TRUE); 398 erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN); 399 nwordv = wordvsplice(0, wordc, nwordv); 400 nwordv[1] = wordv[wordc - 2]; 401 return(C_TRUE); 402 } 403 return(C_UNKNOWN); 404 } 405
Indexes created Thu Sep 25 08:09:54 GMT 2025