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1.1 ! root 1: /* ! 2: * Copyright (c) 1980 Regents of the University of California. ! 3: * All rights reserved. The Berkeley software License Agreement ! 4: * specifies the terms and conditions for redistribution. ! 5: */ ! 6: ! 7: #ifndef lint ! 8: static char sccsid[] = "@(#)errorpi.c 5.1 (Berkeley) 5/31/85"; ! 9: #endif not lint ! 10: ! 11: #include <stdio.h> ! 12: #include <ctype.h> ! 13: #include "error.h" ! 14: ! 15: extern char *currentfilename; ! 16: static char *c_linenumber; ! 17: static char *unk_hdr[] = {"In", "program", "???"}; ! 18: static char **c_header = &unk_hdr[0]; ! 19: ! 20: /* ! 21: * Attempt to handle error messages produced by pi (and by pc) ! 22: * ! 23: * problem #1: There is no file name available when a file does not ! 24: * use a #include; this will have to be given to error ! 25: * in the command line. ! 26: * problem #2: pi doesn't always tell you what line number ! 27: * a error refers to; for example during the tree ! 28: * walk phase of code generation and error detection, ! 29: * an error can refer to "variable foo in procedure bletch" ! 30: * without giving a line number ! 31: * problem #3: line numbers, when available, are attached to ! 32: * the source line, along with the source line itself ! 33: * These line numbers must be extracted, and ! 34: * the source line thrown away. ! 35: * problem #4: Some error messages produce more than one line number ! 36: * on the same message. ! 37: * There are only two (I think): ! 38: * %s undefined on line%s ! 39: * %s improperly used on line%s ! 40: * here, the %s makes line plural or singular. ! 41: * ! 42: * Here are the error strings used in pi version 1.2 that can refer ! 43: * to a file name or line number: ! 44: * ! 45: * Multiply defined label in case, lines %d and %d ! 46: * Goto %s from line %d is into a structured statement ! 47: * End matched %s on line %d ! 48: * Inserted keyword end matching %s on line %d ! 49: * ! 50: * Here are the general pi patterns recognized: ! 51: * define piptr == -.*^-.* ! 52: * define msg = .* ! 53: * define digit = [0-9] ! 54: * definename = .* ! 55: * define date_format letter*3 letter*3 (digit | (digit digit)) ! 56: * (digit | (digit digit)):digit*2 digit*4 ! 57: * ! 58: * {e,E} (piptr) (msg) Encounter an error during textual scan ! 59: * E {digit}* - (msg) Have an error message that refers to a new line ! 60: * E - msg Have an error message that refers to current ! 61: * function, program or procedure ! 62: * (date_format) (name): When switch compilation files ! 63: * ... (msg) When refer to the previous line ! 64: * 'In' ('procedure'|'function'|'program') (name): ! 65: * pi is now complaining about 2nd pass errors. ! 66: * ! 67: * Here is the output from a compilation ! 68: * ! 69: * ! 70: * 2 var i:integer; ! 71: * e --------------^--- Inserted ';' ! 72: * E 2 - All variables must be declared in one var part ! 73: * E 5 - Include filename must end in .i ! 74: * Mon Apr 21 15:56 1980 test.h: ! 75: * 2 begin ! 76: * e ------^--- Inserted ';' ! 77: * Mon Apr 21 16:06 1980 test.p: ! 78: * E 2 - Function type must be specified ! 79: * 6 procedure foo(var x:real); ! 80: * e ------^--- Inserted ';' ! 81: * In function bletch: ! 82: * E - No assignment to the function variable ! 83: * w - variable x is never used ! 84: * E 6 - foo is already defined in this block ! 85: * In procedure foo: ! 86: * w - variable x is neither used nor set ! 87: * 9 z : = 23; ! 88: * E --------------^--- Undefined variable ! 89: * 10 y = [1]; ! 90: * e ----------------^--- Inserted ':' ! 91: * 13 z := 345.; ! 92: * e -----------------------^--- Digits required after decimal point ! 93: * E 10 - Constant set involved in non set context ! 94: * E 11 - Type clash: real is incompatible with integer ! 95: * ... Type of expression clashed with type of variable in assignment ! 96: * E 12 - Parameter type not identical to type of var parameter x of foo ! 97: * In program mung: ! 98: * w - variable y is never used ! 99: * w - type foo is never used ! 100: * w - function bletch is never used ! 101: * E - z undefined on lines 9 13 ! 102: */ ! 103: char *Months[] = { ! 104: "Jan", "Feb", "Mar", "Apr", "May", "Jun", ! 105: "Jul", "Aug", "Sep", "Oct","Nov", "Dec", ! 106: 0 ! 107: }; ! 108: char *Days[] = { ! 109: "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0 ! 110: }; ! 111: char *Piroutines[] = { ! 112: "program", "function", "procedure", 0 ! 113: }; ! 114: ! 115: ! 116: static boolean structured, multiple; ! 117: ! 118: char *pi_Endmatched[] = {"End", "matched"}; ! 119: char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"}; ! 120: ! 121: char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"}; ! 122: char *pi_structured[] = {"is", "into", "a", "structured", "statement"}; ! 123: ! 124: char *pi_und1[] = {"undefined", "on", "line"}; ! 125: char *pi_und2[] = {"undefined", "on", "lines"}; ! 126: char *pi_imp1[] = {"improperly", "used", "on", "line"}; ! 127: char *pi_imp2[] = {"improperly", "used", "on", "lines"}; ! 128: ! 129: boolean alldigits(string) ! 130: reg char *string; ! 131: { ! 132: for (; *string && isdigit(*string); string++) ! 133: continue; ! 134: return(*string == '\0'); ! 135: } ! 136: boolean instringset(member, set) ! 137: char *member; ! 138: reg char **set; ! 139: { ! 140: for(; *set; set++){ ! 141: if (strcmp(*set, member) == 0) ! 142: return(TRUE); ! 143: } ! 144: return(FALSE); ! 145: } ! 146: ! 147: boolean isdateformat(wordc, wordv) ! 148: int wordc; ! 149: char **wordv; ! 150: { ! 151: return( ! 152: (wordc == 5) ! 153: && (instringset(wordv[0], Days)) ! 154: && (instringset(wordv[1], Months)) ! 155: && (alldigits(wordv[2])) ! 156: && (alldigits(wordv[4])) ); ! 157: } ! 158: ! 159: boolean piptr(string) ! 160: reg char *string; ! 161: { ! 162: if (*string != '-') ! 163: return(FALSE); ! 164: while (*string && *string == '-') ! 165: string++; ! 166: if (*string != '^') ! 167: return(FALSE); ! 168: string++; ! 169: while (*string && *string == '-') ! 170: string++; ! 171: return(*string == '\0'); ! 172: } ! 173: ! 174: extern int wordc; ! 175: extern char **wordv; ! 176: ! 177: Errorclass pi() ! 178: { ! 179: char **nwordv; ! 180: ! 181: if (wordc < 2) ! 182: return (C_UNKNOWN); ! 183: if ( ( strlen(wordv[1]) == 1) ! 184: && ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') ) ! 185: && ( piptr(wordv[2]) ) ! 186: ) { ! 187: boolean longpiptr = 0; ! 188: /* ! 189: * We have recognized a first pass error of the form: ! 190: * letter ------^---- message ! 191: * ! 192: * turn into an error message of the form: ! 193: * ! 194: * file line 'pascal errortype' letter \n |---- message ! 195: * or of the form: ! 196: * file line letter |---- message ! 197: * when there are strlen("(*[pi]") or more ! 198: * preceding '-' on the error pointer. ! 199: * ! 200: * Where the | is intended to be a down arrow, so that ! 201: * the pi error messages can be inserted above the ! 202: * line in error, instead of below. (All of the other ! 203: * langauges put thier messages before the source line, ! 204: * instead of after it as does pi.) ! 205: * ! 206: * where the pointer to the error has been truncated ! 207: * by 6 characters to account for the fact that ! 208: * the pointer points into a tab preceded input line. ! 209: */ ! 210: language = INPI; ! 211: (void)substitute(wordv[2], '^', '|'); ! 212: longpiptr = position(wordv[2],'|') > (6+8); ! 213: nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1); ! 214: nwordv[0] = strsave(currentfilename); ! 215: nwordv[1] = strsave(c_linenumber); ! 216: if (!longpiptr){ ! 217: nwordv[2] = "pascal errortype"; ! 218: nwordv[3] = wordv[1]; ! 219: nwordv[4] = strsave("%%%\n"); ! 220: if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */ ! 221: nwordv[5] += (8-2); /* bump over 6 characters */ ! 222: } ! 223: wordv = nwordv - 1; /* convert to 1 based */ ! 224: wordc += longpiptr ? 2 : 4; ! 225: return(C_TRUE); ! 226: } ! 227: if ( (wordc >= 4) ! 228: && (strlen(wordv[1]) == 1) ! 229: && ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') ) ! 230: && (alldigits(wordv[2])) ! 231: && (strlen(wordv[3]) == 1) ! 232: && (wordv[3][0] == '-') ! 233: ){ ! 234: /* ! 235: * Message of the form: letter linenumber - message ! 236: * Turn into form: filename linenumber letter - message ! 237: */ ! 238: language = INPI; ! 239: nwordv = wordvsplice(1, wordc, wordv + 1); ! 240: nwordv[0] = strsave(currentfilename); ! 241: nwordv[1] = wordv[2]; ! 242: nwordv[2] = wordv[1]; ! 243: c_linenumber = wordv[2]; ! 244: wordc += 1; ! 245: wordv = nwordv - 1; ! 246: return(C_TRUE); ! 247: } ! 248: if ( (wordc >= 3) ! 249: && (strlen(wordv[1]) == 1) ! 250: && ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') ) ! 251: && (strlen(wordv[2]) == 1) ! 252: && (wordv[2][0] == '-') ! 253: ) { ! 254: /* ! 255: * Message of the form: letter - message ! 256: * This happens only when we are traversing the tree ! 257: * during the second pass of pi, and discover semantic ! 258: * errors. ! 259: * ! 260: * We have already (presumably) saved the header message ! 261: * and can now construct a nulled error message for the ! 262: * current file. ! 263: * ! 264: * Turns into a message of the form: ! 265: * filename (header) letter - message ! 266: * ! 267: * First, see if it is a message referring to more than ! 268: * one line number. Only of the form: ! 269: * %s undefined on line%s ! 270: * %s improperly used on line%s ! 271: */ ! 272: boolean undefined = 0; ! 273: int wordindex; ! 274: ! 275: language = INPI; ! 276: if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) ) ! 277: || (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) ) ! 278: || (wordvcmp(wordv+2, 4, pi_imp1) == 0) ! 279: || (wordvcmp(wordv+2, 4, pi_imp2) == 0) ! 280: ){ ! 281: for (wordindex = undefined ? 5 : 6; wordindex <= wordc; ! 282: wordindex++){ ! 283: nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1); ! 284: nwordv[0] = strsave(currentfilename); ! 285: nwordv[1] = wordv[wordindex]; ! 286: if (wordindex != wordc) ! 287: erroradd(undefined ? 4 : 5, nwordv, ! 288: C_TRUE, C_UNKNOWN); ! 289: } ! 290: wordc = undefined ? 4 : 5; ! 291: wordv = nwordv - 1; ! 292: return(C_TRUE); ! 293: } ! 294: ! 295: nwordv = wordvsplice(1+3, wordc, wordv+1); ! 296: nwordv[0] = strsave(currentfilename); ! 297: nwordv[1] = strsave(c_header[0]); ! 298: nwordv[2] = strsave(c_header[1]); ! 299: nwordv[3] = strsave(c_header[2]); ! 300: wordv = nwordv - 1; ! 301: wordc += 1 + 3; ! 302: return(C_THISFILE); ! 303: } ! 304: if (strcmp(wordv[1], "...") == 0){ ! 305: /* ! 306: * have a continuation error message ! 307: * of the form: ... message ! 308: * Turn into form : filename linenumber message ! 309: */ ! 310: language = INPI; ! 311: nwordv = wordvsplice(1, wordc, wordv+1); ! 312: nwordv[0] = strsave(currentfilename); ! 313: nwordv[1] = strsave(c_linenumber); ! 314: wordv = nwordv - 1; ! 315: wordc += 1; ! 316: return(C_TRUE); ! 317: } ! 318: if( (wordc == 6) ! 319: && (lastchar(wordv[6]) == ':') ! 320: && (isdateformat(5, wordv + 1)) ! 321: ){ ! 322: /* ! 323: * Have message that tells us we have changed files ! 324: */ ! 325: language = INPI; ! 326: currentfilename = strsave(wordv[6]); ! 327: clob_last(currentfilename, '\0'); ! 328: return(C_SYNC); ! 329: } ! 330: if( (wordc == 3) ! 331: && (strcmp(wordv[1], "In") == 0) ! 332: && (lastchar(wordv[3]) == ':') ! 333: && (instringset(wordv[2], Piroutines)) ! 334: ) { ! 335: language = INPI; ! 336: c_header = wordvsplice(0, wordc, wordv+1); ! 337: return(C_SYNC); ! 338: } ! 339: /* ! 340: * now, check for just the line number followed by the text ! 341: */ ! 342: if (alldigits(wordv[1])){ ! 343: language = INPI; ! 344: c_linenumber = wordv[1]; ! 345: return(C_IGNORE); ! 346: } ! 347: /* ! 348: * Attempt to match messages refering to a line number ! 349: * ! 350: * Multiply defined label in case, lines %d and %d ! 351: * Goto %s from line %d is into a structured statement ! 352: * End matched %s on line %d ! 353: * Inserted keyword end matching %s on line %d ! 354: */ ! 355: multiple = structured = 0; ! 356: if ( ! 357: ( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0)) ! 358: || ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0)) ! 359: || ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) ) ! 360: || ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) )) ! 361: ){ ! 362: language = INPI; ! 363: nwordv = wordvsplice(2, wordc, wordv+1); ! 364: nwordv[0] = strsave(currentfilename); ! 365: nwordv[1] = structured ? wordv [5] : wordv[wordc]; ! 366: wordc += 2; ! 367: wordv = nwordv - 1; ! 368: if (!multiple) ! 369: return(C_TRUE); ! 370: erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN); ! 371: nwordv = wordvsplice(0, wordc, nwordv); ! 372: nwordv[1] = wordv[wordc - 2]; ! 373: return(C_TRUE); ! 374: } ! 375: return(C_UNKNOWN); ! 376: }
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