Message-ID: <D1DE20405ECBD011B2AC0060974BC6EA04F921@DBSERVER>
From: "EFT.Eric Devolder" <eric DOT devolder AT eft DOT be>
To: djgpp AT delorie DOT com
Subject: Program goes wrong when optimized under gcc 2.8
Date: Mon, 28 Sep 1998 11:24:28 +0200
MIME-Version: 1.0
Content-Type: multipart/mixed;
	boundary="---- =_NextPart_000_01BDEAD2.8EECFE90"
Precedence: bulk

This message is in MIME format. Since your mail reader does not understand
this format, some or all of this message may not be legible.

------ =_NextPart_000_01BDEAD2.8EECFE90
Content-Type: text/plain

> Hello,
> 
> I'm written a little utility that takes a list of numbers, and
> reformat the output following some rules.
> I'm using gcc 2.8.1, with djgpp 2.01.
> 
> ( >> gcc -v
> Reading specs from e:/djgpp/lib/gcc-lib/djgpp\2.81\specs
> gcc version 2.8.1 )
> 
> Everything works ok.
> 
> I got the following trouble:
> 
> When I compile the program like this: gcc -o hot2std.exe hot2std.c
> it works perfeclty.
> If I try to compile with optimization (gcc -O[1,2 or 3] -o hot2std.exe
> hot2std.c), I get strange outputs, compared to those of the debug
> version.
> 
> Is is a bug in the compilator ? Did I forgot somehting ?
> 
>   
> I've joined the source and an example to pass as argeument to the
> file, so you can have a try to check what's happening.
> 
> Thank you for the help,
> 
> Regards, and enjoy djgpp.
> 
> 
> Eric DEVOLDER <eric DOT devolder AT no DOT spam DOT here>
> (look in <From:> to get my reply adress)
> 
> 

------ =_NextPart_000_01BDEAD2.8EECFE90
Content-Type: application/octet-stream;
	name="hot2std.c"
Content-Disposition: attachment;
	filename="hot2std.c"


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dos.h>

void process_header(long *total, long *hash);
void process_core(FILE *fp, long *total, long *hash);
void process_tailer(long total, long hash);


int main(int argc, char **argv)
{
    FILE *fp = fopen(argv[1], "r");

    if(fp)
    {
	long total, hash;

        process_header(&total, &hash);
	process_core(fp, &total, &hash);
	process_tailer(total,hash);
	fclose(fp);
    }

    return EXIT_SUCCESS;
}


void process_header(long *total, long *hash)
{
    struct date *now;

    getdate(now);

    fprintf(stdout, "00007%02.2d%02.2d%02.2d  REF%02.2d%02.2d%02.2d          \n",
            now->da_year % 100,
	    now->da_mon,
	    now->da_day,
            now->da_year % 100,
	    now->da_mon,
	    now->da_day);

    *hash = *total = 0;
}


void process_core(FILE *fp, long *total, long *hash)
{
    char buffer[256], *scan;
    char temp[32];
    int i;

    while(fgets(buffer,256,fp))
    {
	scan = strtok(buffer," \n\r\t");
	if(scan) {
            (*total)++;
	    sprintf(temp,"0002%06.6ldA%019.19s  \n",
                    *total,
                    scan);

            fprintf(stdout,"%s",temp);
	    for(i=22;i<30;i++)
              *hash += temp[i]-'0';

            *hash %= 1000000L; /* from 000000 to 999999 */
	}
    }
}

void process_tailer(long total, long hash)
{
    fprintf(stdout,"0009%06.6ld000000%06.6ld \n",
            total,
            hash);
}


------ =_NextPart_000_01BDEAD2.8EECFE90
Content-Type: application/octet-stream;
	name="raw"
Content-Disposition: attachment;
	filename="raw"

829675487453075
037752318061804891
103049328881547
99033081585345690
625091268786167
72254112224180717
737000202010339
135586157629633
70696602637605
34493563326108498
631400339051271285
0847432064640
92687216086968
8560954324697
52572471609315
39642916691552761
06917489553482
01001852559639552
22466415178143
254045538706270
45180185353631
1143343523522
71813545676732
92591863965707646
816954815096585845
1221594201987
141046321294458512
5096357855376543
1323983593371379
404870752411233
364385320233487835
36022940036109
2126749725038852
5581532741171405
0468092296925996
70366121293795980
2295754100949
851619230970423632
5920505840715752
5571190252486
8519192501541830
94714539147926781
963248435104076733
76441608732721
600458764907814140
1795959219620200
40558722950280
679751659043272311
86584336709977
396063159512811754
------ =_NextPart_000_01BDEAD2.8EECFE90--