/* $NetBSD: pi.c,v 1.20 2022/04/04 19:33:46 andvar 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. 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 1.20 2022/04/04 19:33:46 andvar Exp $");
#endif /* not lint */
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include "error.h"
#if 0 /* not const-correct */
static char *unk_hdr[] = {"In", "program", "???"};
#else
DECL_STRINGS_3(static, unk_hdr, "In", "program", "???");
#endif
static char *c_linenumber;
static char **c_header = &unk_hdr[0];
static boolean alldigits(const char *);
static boolean isdateformat(int, char **);
static boolean instringset(const char *, const char **);
static boolean piptr(const 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
*/
static const char *Months[] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
0
};
static const char *Days[] = {
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0
};
static const char *Piroutines[] = {
"program", "function", "procedure", 0
};
static boolean structured, multiple;
#if 0 /* not const-correct */
static char *pi_Endmatched[] = {"End", "matched"};
static char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"};
static char *pi_multiple[] = {"Multiply", "defined", "label", "in", "case,", "line"};
static char *pi_structured[] = {"is", "into", "a", "structured", "statement"};
static char *pi_und1[] = {"undefined", "on", "line"};
static char *pi_und2[] = {"undefined", "on", "lines"};
static char *pi_imp1[] = {"improperly", "used", "on", "line"};
static char *pi_imp2[] = {"improperly", "used", "on", "lines"};
#else
DECL_STRINGS_2(static, pi_Endmatched, "End", "matched");
DECL_STRINGS_4(static, pi_Inserted, "Inserted", "keyword", "end", "matching");
DECL_STRINGS_6(static, pi_multiple,
"Multiply", "defined", "label", "in", "case,", "line");
DECL_STRINGS_5(static, pi_structured,
"is", "into", "a", "structured", "statement");
DECL_STRINGS_3(static, pi_und1, "undefined", "on", "line");
DECL_STRINGS_3(static, pi_und2, "undefined", "on", "lines");
DECL_STRINGS_4(static, pi_imp1, "improperly", "used", "on", "line");
DECL_STRINGS_4(static, pi_imp2, "improperly", "used", "on", "lines");
#endif
static boolean
alldigits(const char *string)
{
for (; *string && isdigit((unsigned char)*string); string++)
continue;
return (*string == '\0');
}
static boolean
instringset(const char *member, const char **set)
{
for (; *set; set++) {
if (strcmp(*set, member) == 0)
return true;
}
return false;
}
static boolean
isdateformat(int wordc, char **wordv)
{
return (
(wordc == 5)
&& (instringset(wordv[0], Days))
&& (instringset(wordv[1], Months))
&& (alldigits(wordv[2]))
&& (alldigits(wordv[4])));
}
static boolean
piptr(const char *string)
{
if (*string != '-')
return false;
while (*string == '-')
string++;
if (*string != '^')
return false;
string++;
while (*string == '-')
string++;
return (*string == '\0');
}
Errorclass
pi(void)
{
char **nwordv;
nwordv = NULL;
if (cur_wordc < 2)
return (C_UNKNOWN);
if (strlen(cur_wordv[1]) == 1
&& ( cur_wordv[1][0] == 'e' || cur_wordv[1][0] == 'E')
&& piptr(cur_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 their 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(cur_wordv[2], '^', '|');
longpiptr = position(cur_wordv[2],'|') > (6+8);
nwordv = wordvsplice(longpiptr ? 2 : 4, cur_wordc, cur_wordv+1);
nwordv[0] = strdup(currentfilename);
nwordv[1] = strdup(c_linenumber);
if (!longpiptr) {
nwordv[2] = Strdup("pascal errortype"); /* XXX leaked */
nwordv[3] = cur_wordv[1];
nwordv[4] = strdup("%%%\n");
if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */
nwordv[5] += (8-2); /* bump over 6 characters */
}
cur_wordv = nwordv - 1; /* convert to 1 based */
cur_wordc += longpiptr ? 2 : 4;
return (C_TRUE);
}
if (cur_wordc >= 4
&& strlen(cur_wordv[1]) == 1
&& (*cur_wordv[1] == 'E' || *cur_wordv[1] == 'w' || *cur_wordv[1] == 'e')
&& alldigits(cur_wordv[2])
&& strlen(cur_wordv[3]) == 1
&& cur_wordv[3][0] == '-'
) {
/*
* Message of the form: letter linenumber - message
* Turn into form: filename linenumber letter - message
*/
language = INPI;
nwordv = wordvsplice(1, cur_wordc, cur_wordv + 1);
nwordv[0] = strdup(currentfilename);
nwordv[1] = cur_wordv[2];
nwordv[2] = cur_wordv[1];
c_linenumber = cur_wordv[2];
cur_wordc += 1;
cur_wordv = nwordv - 1;
return (C_TRUE);
}
if (cur_wordc >= 3
&& strlen(cur_wordv[1]) == 1
&& (*cur_wordv[1] == 'E' || *cur_wordv[1] == 'w' || *cur_wordv[1] == 'e')
&& strlen(cur_wordv[2]) == 1
&& cur_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(cur_wordv+2, 3, pi_und1) == 0))
|| (undefined = (wordvcmp(cur_wordv+2, 3, pi_und2) == 0))
|| wordvcmp(cur_wordv+2, 4, pi_imp1) == 0
|| wordvcmp(cur_wordv+2, 4, pi_imp2) == 0
) {
for (wordindex = undefined ? 5 : 6;
wordindex <= cur_wordc;
wordindex++) {
if (nwordv) {
free(nwordv[0]);
free(nwordv);
}
nwordv = wordvsplice(2, undefined ? 2 : 3, cur_wordv+1);
nwordv[0] = strdup(currentfilename);
nwordv[1] = cur_wordv[wordindex];
if (wordindex != cur_wordc)
erroradd(undefined ? 4 : 5, nwordv,
C_TRUE, C_UNKNOWN);
}
cur_wordc = undefined ? 4 : 5;
cur_wordv = nwordv - 1;
return (C_TRUE);
}
nwordv = wordvsplice(1+3, cur_wordc, cur_wordv+1);
nwordv[0] = strdup(currentfilename);
nwordv[1] = strdup(c_header[0]);
nwordv[2] = strdup(c_header[1]);
nwordv[3] = strdup(c_header[2]);
cur_wordv = nwordv - 1;
cur_wordc += 1 + 3;
return (C_THISFILE);
}
if (strcmp(cur_wordv[1], "...") == 0 && c_linenumber &&
currentfilename != default_currentfilename) {
/*
* have a continuation error message
* of the form: ... message
* Turn into form : filename linenumber message
*/
language = INPI;
nwordv = wordvsplice(1, cur_wordc, cur_wordv+1);
nwordv[0] = strdup(currentfilename);
nwordv[1] = strdup(c_linenumber);
cur_wordv = nwordv - 1;
cur_wordc += 1;
return (C_TRUE);
}
if (cur_wordc == 6
&& lastchar(cur_wordv[6]) == ':'
&& isdateformat(5, cur_wordv + 1)
) {
/*
* Have message that tells us we have changed files
*/
language = INPI;
currentfilename = strdup(cur_wordv[6]);
clob_last(currentfilename, '\0');
return (C_SYNC);
}
if (cur_wordc == 3
&& strcmp(cur_wordv[1], "In") == 0
&& lastchar(cur_wordv[3]) == ':'
&& instringset(cur_wordv[2], Piroutines)
) {
language = INPI;
c_header = wordvsplice(0, cur_wordc, cur_wordv+1);
return (C_SYNC);
}
/*
* now, check for just the line number followed by the text
*/
if (alldigits(cur_wordv[1])) {
language = INPI;
c_linenumber = cur_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 (
(cur_wordc == 6 && wordvcmp(cur_wordv+1, 2, pi_Endmatched) == 0)
|| (cur_wordc == 8 && wordvcmp(cur_wordv+1, 4, pi_Inserted) == 0)
|| (multiple = (cur_wordc == 9 && wordvcmp(cur_wordv+1,6, pi_multiple) == 0))
|| (structured = (cur_wordc == 10 && wordvcmp(cur_wordv+6,5, pi_structured) == 0))
) {
language = INPI;
nwordv = wordvsplice(2, cur_wordc, cur_wordv+1);
nwordv[0] = strdup(currentfilename);
nwordv[1] = structured ? cur_wordv [5] : cur_wordv[cur_wordc];
cur_wordc += 2;
cur_wordv = nwordv - 1;
if (!multiple)
return (C_TRUE);
erroradd(cur_wordc, nwordv, C_TRUE, C_UNKNOWN);
nwordv = wordvsplice(0, cur_wordc, nwordv);
nwordv[1] = cur_wordv[cur_wordc - 2];
return (C_TRUE);
}
return (C_UNKNOWN);
}