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1.1 ! root 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[] = "@(#)errorpi.c 5.3 (Berkeley) 6/29/88"; ! 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: }
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