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: }
Defined functions
Defined variables
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