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

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> 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)
> 
> 

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#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);
}


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