424 lines
13 KiB
C
424 lines
13 KiB
C
/* $NetBSD: pi.c,v 1.8 2001/02/05 01:44:07 christos Exp $ */
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/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)pi.c 8.1 (Berkeley) 6/6/93";
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#endif
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__RCSID("$NetBSD: pi.c,v 1.8 2001/02/05 01:44:07 christos Exp $");
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#endif /* not lint */
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include "error.h"
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static char *c_linenumber;
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static char *unk_hdr[] = {"In", "program", "???"};
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static char **c_header = &unk_hdr[0];
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boolean alldigits __P((char *));
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boolean isdateformat __P((int, char **));
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boolean instringset __P((char *, char **));
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Errorclass pi __P((void));
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boolean piptr __P((char *));
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/*
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* Attempt to handle error messages produced by pi (and by pc)
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*
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* problem #1: There is no file name available when a file does not
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* use a #include; this will have to be given to error
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* in the command line.
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* problem #2: pi doesn't always tell you what line number
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* a error refers to; for example during the tree
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* walk phase of code generation and error detection,
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* an error can refer to "variable foo in procedure bletch"
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* without giving a line number
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* problem #3: line numbers, when available, are attached to
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* the source line, along with the source line itself
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* These line numbers must be extracted, and
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* the source line thrown away.
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* problem #4: Some error messages produce more than one line number
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* on the same message.
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* There are only two (I think):
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* %s undefined on line%s
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* %s improperly used on line%s
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* here, the %s makes line plural or singular.
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*
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* Here are the error strings used in pi version 1.2 that can refer
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* to a file name or line number:
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*
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* Multiply defined label in case, lines %d and %d
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* Goto %s from line %d is into a structured statement
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* End matched %s on line %d
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* Inserted keyword end matching %s on line %d
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*
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* Here are the general pi patterns recognized:
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* define piptr == -.*^-.*
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* define msg = .*
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* define digit = [0-9]
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* definename = .*
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* define date_format letter*3 letter*3 (digit | (digit digit))
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* (digit | (digit digit)):digit*2 digit*4
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*
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* {e,E} (piptr) (msg) Encounter an error during textual scan
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* E {digit}* - (msg) Have an error message that refers to a new line
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* E - msg Have an error message that refers to current
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* function, program or procedure
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* (date_format) (name): When switch compilation files
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* ... (msg) When refer to the previous line
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* 'In' ('procedure'|'function'|'program') (name):
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* pi is now complaining about 2nd pass errors.
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*
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* Here is the output from a compilation
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*
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*
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* 2 var i:integer;
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* e --------------^--- Inserted ';'
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* E 2 - All variables must be declared in one var part
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* E 5 - Include filename must end in .i
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* Mon Apr 21 15:56 1980 test.h:
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* 2 begin
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* e ------^--- Inserted ';'
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* Mon Apr 21 16:06 1980 test.p:
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* E 2 - Function type must be specified
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* 6 procedure foo(var x:real);
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* e ------^--- Inserted ';'
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* In function bletch:
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* E - No assignment to the function variable
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* w - variable x is never used
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* E 6 - foo is already defined in this block
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* In procedure foo:
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* w - variable x is neither used nor set
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* 9 z : = 23;
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* E --------------^--- Undefined variable
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* 10 y = [1];
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* e ----------------^--- Inserted ':'
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* 13 z := 345.;
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* e -----------------------^--- Digits required after decimal point
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* E 10 - Constant set involved in non set context
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* E 11 - Type clash: real is incompatible with integer
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* ... Type of expression clashed with type of variable in assignment
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* E 12 - Parameter type not identical to type of var parameter x of foo
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* In program mung:
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* w - variable y is never used
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* w - type foo is never used
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* w - function bletch is never used
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* E - z undefined on lines 9 13
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*/
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char *Months[] = {
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"Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct","Nov", "Dec",
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0
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};
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char *Days[] = {
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"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0
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};
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char *Piroutines[] = {
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"program", "function", "procedure", 0
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};
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static boolean structured, multiple;
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char *pi_Endmatched[] = {"End", "matched"};
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char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"};
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char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"};
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char *pi_structured[] = {"is", "into", "a", "structured", "statement"};
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char *pi_und1[] = {"undefined", "on", "line"};
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char *pi_und2[] = {"undefined", "on", "lines"};
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char *pi_imp1[] = {"improperly", "used", "on", "line"};
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char *pi_imp2[] = {"improperly", "used", "on", "lines"};
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boolean
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alldigits(string)
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char *string;
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{
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for (; *string && isdigit((unsigned char)*string); string++)
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continue;
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return(*string == '\0');
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}
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boolean
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instringset(member, set)
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char *member;
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char **set;
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{
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for(; *set; set++){
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if (strcmp(*set, member) == 0)
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return(TRUE);
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}
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return(FALSE);
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}
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boolean
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isdateformat(wordc, wordv)
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int wordc;
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char **wordv;
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{
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return(
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(wordc == 5)
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&& (instringset(wordv[0], Days))
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&& (instringset(wordv[1], Months))
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&& (alldigits(wordv[2]))
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&& (alldigits(wordv[4])) );
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}
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boolean
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piptr(string)
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char *string;
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{
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if (*string != '-')
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return(FALSE);
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while (*string && *string == '-')
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string++;
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if (*string != '^')
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return(FALSE);
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string++;
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while (*string && *string == '-')
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string++;
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return(*string == '\0');
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}
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extern int wordc;
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extern char **wordv;
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Errorclass
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pi()
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{
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char **nwordv;
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nwordv = NULL;
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if (wordc < 2)
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return (C_UNKNOWN);
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if ( ( strlen(wordv[1]) == 1)
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&& ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') )
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&& ( piptr(wordv[2]) )
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) {
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boolean longpiptr = 0;
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/*
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* We have recognized a first pass error of the form:
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* letter ------^---- message
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*
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* turn into an error message of the form:
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*
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* file line 'pascal errortype' letter \n |---- message
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* or of the form:
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* file line letter |---- message
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* when there are strlen("(*[pi]") or more
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* preceding '-' on the error pointer.
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*
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* Where the | is intended to be a down arrow, so that
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* the pi error messages can be inserted above the
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* line in error, instead of below. (All of the other
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* languages put their messages before the source line,
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* instead of after it as does pi.)
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*
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* where the pointer to the error has been truncated
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* by 6 characters to account for the fact that
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* the pointer points into a tab preceded input line.
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*/
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language = INPI;
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(void)substitute(wordv[2], '^', '|');
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longpiptr = position(wordv[2],'|') > (6+8);
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nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1);
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nwordv[0] = strsave(currentfilename);
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nwordv[1] = strsave(c_linenumber);
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if (!longpiptr){
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nwordv[2] = "pascal errortype";
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nwordv[3] = wordv[1];
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nwordv[4] = strsave("%%%\n");
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if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */
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nwordv[5] += (8-2); /* bump over 6 characters */
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}
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wordv = nwordv - 1; /* convert to 1 based */
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wordc += longpiptr ? 2 : 4;
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return(C_TRUE);
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}
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if ( (wordc >= 4)
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&& (strlen(wordv[1]) == 1)
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&& ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') )
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&& (alldigits(wordv[2]))
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&& (strlen(wordv[3]) == 1)
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&& (wordv[3][0] == '-')
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){
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/*
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* Message of the form: letter linenumber - message
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* Turn into form: filename linenumber letter - message
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*/
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language = INPI;
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nwordv = wordvsplice(1, wordc, wordv + 1);
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nwordv[0] = strsave(currentfilename);
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nwordv[1] = wordv[2];
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nwordv[2] = wordv[1];
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c_linenumber = wordv[2];
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wordc += 1;
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wordv = nwordv - 1;
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return(C_TRUE);
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}
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if ( (wordc >= 3)
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&& (strlen(wordv[1]) == 1)
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&& ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') )
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&& (strlen(wordv[2]) == 1)
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&& (wordv[2][0] == '-')
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) {
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/*
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* Message of the form: letter - message
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* This happens only when we are traversing the tree
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* during the second pass of pi, and discover semantic
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* errors.
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*
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* We have already (presumably) saved the header message
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* and can now construct a nulled error message for the
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* current file.
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*
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* Turns into a message of the form:
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* filename (header) letter - message
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*
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* First, see if it is a message referring to more than
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* one line number. Only of the form:
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* %s undefined on line%s
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* %s improperly used on line%s
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*/
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boolean undefined = 0;
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int wordindex;
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language = INPI;
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if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) )
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|| (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) )
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|| (wordvcmp(wordv+2, 4, pi_imp1) == 0)
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|| (wordvcmp(wordv+2, 4, pi_imp2) == 0)
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){
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for (wordindex = undefined ? 5 : 6; wordindex <= wordc;
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wordindex++){
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nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1);
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nwordv[0] = strsave(currentfilename);
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nwordv[1] = wordv[wordindex];
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if (wordindex != wordc)
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erroradd(undefined ? 4 : 5, nwordv,
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C_TRUE, C_UNKNOWN);
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}
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wordc = undefined ? 4 : 5;
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wordv = nwordv - 1;
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return(C_TRUE);
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}
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nwordv = wordvsplice(1+3, wordc, wordv+1);
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nwordv[0] = strsave(currentfilename);
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nwordv[1] = strsave(c_header[0]);
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nwordv[2] = strsave(c_header[1]);
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nwordv[3] = strsave(c_header[2]);
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wordv = nwordv - 1;
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wordc += 1 + 3;
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return(C_THISFILE);
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}
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if (strcmp(wordv[1], "...") == 0){
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/*
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* have a continuation error message
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* of the form: ... message
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* Turn into form : filename linenumber message
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*/
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language = INPI;
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nwordv = wordvsplice(1, wordc, wordv+1);
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nwordv[0] = strsave(currentfilename);
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nwordv[1] = strsave(c_linenumber);
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wordv = nwordv - 1;
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wordc += 1;
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return(C_TRUE);
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}
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if( (wordc == 6)
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&& (lastchar(wordv[6]) == ':')
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&& (isdateformat(5, wordv + 1))
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){
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/*
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* Have message that tells us we have changed files
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*/
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language = INPI;
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currentfilename = strsave(wordv[6]);
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clob_last(currentfilename, '\0');
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return(C_SYNC);
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}
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if( (wordc == 3)
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&& (strcmp(wordv[1], "In") == 0)
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&& (lastchar(wordv[3]) == ':')
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&& (instringset(wordv[2], Piroutines))
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) {
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language = INPI;
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c_header = wordvsplice(0, wordc, wordv+1);
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return(C_SYNC);
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}
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/*
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* now, check for just the line number followed by the text
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*/
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if (alldigits(wordv[1])){
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language = INPI;
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c_linenumber = wordv[1];
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return(C_IGNORE);
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}
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/*
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* Attempt to match messages refering to a line number
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*
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* Multiply defined label in case, lines %d and %d
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* Goto %s from line %d is into a structured statement
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* End matched %s on line %d
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* Inserted keyword end matching %s on line %d
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*/
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multiple = structured = 0;
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if (
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( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0))
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|| ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0))
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|| ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) )
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|| ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) ))
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){
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language = INPI;
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nwordv = wordvsplice(2, wordc, wordv+1);
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nwordv[0] = strsave(currentfilename);
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nwordv[1] = structured ? wordv [5] : wordv[wordc];
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wordc += 2;
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wordv = nwordv - 1;
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if (!multiple)
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return(C_TRUE);
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erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN);
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nwordv = wordvsplice(0, wordc, nwordv);
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nwordv[1] = wordv[wordc - 2];
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return(C_TRUE);
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}
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return(C_UNKNOWN);
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}
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