/* $NetBSD: pi.c,v 1.4 1997/10/18 14:44:37 lukem Exp $ */ /* * Copyright (c) 1980, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/cdefs.h> #ifndef lint #if 0 static char sccsid[] = "@(#)pi.c 8.1 (Berkeley) 6/6/93"; #endif __RCSID("$NetBSD: pi.c,v 1.4 1997/10/18 14:44:37 lukem Exp $"); #endif /* not lint */ #include <stdio.h> #include <ctype.h> #include <string.h> #include "error.h" extern char *currentfilename; static char *c_linenumber; static char *unk_hdr[] = {"In", "program", "???"}; static char **c_header = &unk_hdr[0]; boolean alldigits __P((char *)); boolean isdateformat __P((int, char **)); boolean instringset __P((char *, char **)); Errorclass pi __P((void)); boolean piptr __P((char *)); /* * Attempt to handle error messages produced by pi (and by pc) * * problem #1: There is no file name available when a file does not * use a #include; this will have to be given to error * in the command line. * problem #2: pi doesn't always tell you what line number * a error refers to; for example during the tree * walk phase of code generation and error detection, * an error can refer to "variable foo in procedure bletch" * without giving a line number * problem #3: line numbers, when available, are attached to * the source line, along with the source line itself * These line numbers must be extracted, and * the source line thrown away. * problem #4: Some error messages produce more than one line number * on the same message. * There are only two (I think): * %s undefined on line%s * %s improperly used on line%s * here, the %s makes line plural or singular. * * Here are the error strings used in pi version 1.2 that can refer * to a file name or line number: * * Multiply defined label in case, lines %d and %d * Goto %s from line %d is into a structured statement * End matched %s on line %d * Inserted keyword end matching %s on line %d * * Here are the general pi patterns recognized: * define piptr == -.*^-.* * define msg = .* * define digit = [0-9] * definename = .* * define date_format letter*3 letter*3 (digit | (digit digit)) * (digit | (digit digit)):digit*2 digit*4 * * {e,E} (piptr) (msg) Encounter an error during textual scan * E {digit}* - (msg) Have an error message that refers to a new line * E - msg Have an error message that refers to current * function, program or procedure * (date_format) (name): When switch compilation files * ... (msg) When refer to the previous line * 'In' ('procedure'|'function'|'program') (name): * pi is now complaining about 2nd pass errors. * * Here is the output from a compilation * * * 2 var i:integer; * e --------------^--- Inserted ';' * E 2 - All variables must be declared in one var part * E 5 - Include filename must end in .i * Mon Apr 21 15:56 1980 test.h: * 2 begin * e ------^--- Inserted ';' * Mon Apr 21 16:06 1980 test.p: * E 2 - Function type must be specified * 6 procedure foo(var x:real); * e ------^--- Inserted ';' * In function bletch: * E - No assignment to the function variable * w - variable x is never used * E 6 - foo is already defined in this block * In procedure foo: * w - variable x is neither used nor set * 9 z : = 23; * E --------------^--- Undefined variable * 10 y = [1]; * e ----------------^--- Inserted ':' * 13 z := 345.; * e -----------------------^--- Digits required after decimal point * E 10 - Constant set involved in non set context * E 11 - Type clash: real is incompatible with integer * ... Type of expression clashed with type of variable in assignment * E 12 - Parameter type not identical to type of var parameter x of foo * In program mung: * w - variable y is never used * w - type foo is never used * w - function bletch is never used * E - z undefined on lines 9 13 */ char *Months[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct","Nov", "Dec", 0 }; char *Days[] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0 }; char *Piroutines[] = { "program", "function", "procedure", 0 }; static boolean structured, multiple; char *pi_Endmatched[] = {"End", "matched"}; char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"}; char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"}; char *pi_structured[] = {"is", "into", "a", "structured", "statement"}; char *pi_und1[] = {"undefined", "on", "line"}; char *pi_und2[] = {"undefined", "on", "lines"}; char *pi_imp1[] = {"improperly", "used", "on", "line"}; char *pi_imp2[] = {"improperly", "used", "on", "lines"}; boolean alldigits(string) char *string; { for (; *string && isdigit(*string); string++) continue; return(*string == '\0'); } boolean instringset(member, set) char *member; char **set; { for(; *set; set++){ if (strcmp(*set, member) == 0) return(TRUE); } return(FALSE); } boolean isdateformat(wordc, wordv) int wordc; char **wordv; { return( (wordc == 5) && (instringset(wordv[0], Days)) && (instringset(wordv[1], Months)) && (alldigits(wordv[2])) && (alldigits(wordv[4])) ); } boolean piptr(string) char *string; { if (*string != '-') return(FALSE); while (*string && *string == '-') string++; if (*string != '^') return(FALSE); string++; while (*string && *string == '-') string++; return(*string == '\0'); } extern int wordc; extern char **wordv; Errorclass pi() { char **nwordv; nwordv = NULL; if (wordc < 2) return (C_UNKNOWN); if ( ( strlen(wordv[1]) == 1) && ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') ) && ( piptr(wordv[2]) ) ) { boolean longpiptr = 0; /* * We have recognized a first pass error of the form: * letter ------^---- message * * turn into an error message of the form: * * file line 'pascal errortype' letter \n |---- message * or of the form: * file line letter |---- message * when there are strlen("(*[pi]") or more * preceding '-' on the error pointer. * * Where the | is intended to be a down arrow, so that * the pi error messages can be inserted above the * line in error, instead of below. (All of the other * languages put thier messages before the source line, * instead of after it as does pi.) * * where the pointer to the error has been truncated * by 6 characters to account for the fact that * the pointer points into a tab preceded input line. */ language = INPI; (void)substitute(wordv[2], '^', '|'); longpiptr = position(wordv[2],'|') > (6+8); nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1); nwordv[0] = strsave(currentfilename); nwordv[1] = strsave(c_linenumber); if (!longpiptr){ nwordv[2] = "pascal errortype"; nwordv[3] = wordv[1]; nwordv[4] = strsave("%%%\n"); if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */ nwordv[5] += (8-2); /* bump over 6 characters */ } wordv = nwordv - 1; /* convert to 1 based */ wordc += longpiptr ? 2 : 4; return(C_TRUE); } if ( (wordc >= 4) && (strlen(wordv[1]) == 1) && ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') ) && (alldigits(wordv[2])) && (strlen(wordv[3]) == 1) && (wordv[3][0] == '-') ){ /* * Message of the form: letter linenumber - message * Turn into form: filename linenumber letter - message */ language = INPI; nwordv = wordvsplice(1, wordc, wordv + 1); nwordv[0] = strsave(currentfilename); nwordv[1] = wordv[2]; nwordv[2] = wordv[1]; c_linenumber = wordv[2]; wordc += 1; wordv = nwordv - 1; return(C_TRUE); } if ( (wordc >= 3) && (strlen(wordv[1]) == 1) && ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') ) && (strlen(wordv[2]) == 1) && (wordv[2][0] == '-') ) { /* * Message of the form: letter - message * This happens only when we are traversing the tree * during the second pass of pi, and discover semantic * errors. * * We have already (presumably) saved the header message * and can now construct a nulled error message for the * current file. * * Turns into a message of the form: * filename (header) letter - message * * First, see if it is a message referring to more than * one line number. Only of the form: * %s undefined on line%s * %s improperly used on line%s */ boolean undefined = 0; int wordindex; language = INPI; if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) ) || (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) ) || (wordvcmp(wordv+2, 4, pi_imp1) == 0) || (wordvcmp(wordv+2, 4, pi_imp2) == 0) ){ for (wordindex = undefined ? 5 : 6; wordindex <= wordc; wordindex++){ nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1); nwordv[0] = strsave(currentfilename); nwordv[1] = wordv[wordindex]; if (wordindex != wordc) erroradd(undefined ? 4 : 5, nwordv, C_TRUE, C_UNKNOWN); } wordc = undefined ? 4 : 5; wordv = nwordv - 1; return(C_TRUE); } nwordv = wordvsplice(1+3, wordc, wordv+1); nwordv[0] = strsave(currentfilename); nwordv[1] = strsave(c_header[0]); nwordv[2] = strsave(c_header[1]); nwordv[3] = strsave(c_header[2]); wordv = nwordv - 1; wordc += 1 + 3; return(C_THISFILE); } if (strcmp(wordv[1], "...") == 0){ /* * have a continuation error message * of the form: ... message * Turn into form : filename linenumber message */ language = INPI; nwordv = wordvsplice(1, wordc, wordv+1); nwordv[0] = strsave(currentfilename); nwordv[1] = strsave(c_linenumber); wordv = nwordv - 1; wordc += 1; return(C_TRUE); } if( (wordc == 6) && (lastchar(wordv[6]) == ':') && (isdateformat(5, wordv + 1)) ){ /* * Have message that tells us we have changed files */ language = INPI; currentfilename = strsave(wordv[6]); clob_last(currentfilename, '\0'); return(C_SYNC); } if( (wordc == 3) && (strcmp(wordv[1], "In") == 0) && (lastchar(wordv[3]) == ':') && (instringset(wordv[2], Piroutines)) ) { language = INPI; c_header = wordvsplice(0, wordc, wordv+1); return(C_SYNC); } /* * now, check for just the line number followed by the text */ if (alldigits(wordv[1])){ language = INPI; c_linenumber = wordv[1]; return(C_IGNORE); } /* * Attempt to match messages refering to a line number * * Multiply defined label in case, lines %d and %d * Goto %s from line %d is into a structured statement * End matched %s on line %d * Inserted keyword end matching %s on line %d */ multiple = structured = 0; if ( ( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0)) || ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0)) || ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) ) || ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) )) ){ language = INPI; nwordv = wordvsplice(2, wordc, wordv+1); nwordv[0] = strsave(currentfilename); nwordv[1] = structured ? wordv [5] : wordv[wordc]; wordc += 2; wordv = nwordv - 1; if (!multiple) return(C_TRUE); erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN); nwordv = wordvsplice(0, wordc, nwordv); nwordv[1] = wordv[wordc - 2]; return(C_TRUE); } return(C_UNKNOWN); }