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Subject:	Re: Fwd: A few DJGPP libc.a bugs
To:	djgpp-workers AT delorie DOT com
References:	<56F8295E DOT 2090401 AT posteo DOT de> <571E403D DOT 8080709 AT iki DOT fi>
From:	"Andris Pavenis (andris DOT pavenis AT iki DOT fi) [via djgpp-workers AT delorie DOT com]" <djgpp-workers AT delorie DOT com>
Message-ID:	<571E4A50.3010806@iki.fi>
Date:	Mon, 25 Apr 2016 19:48:16 +0300
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On 04/25/2016 07:05 PM, Andris Pavenis (andris DOT pavenis AT iki DOT fi) [via djgpp-workers AT delorie DOT com] wrote:
>
> Sent to me privately. I suggested author to send it to list. I have not seen however any activity 
> since that.
> So I'm forwarding message to list.
>
> I'm also committing the proposed patch for ttyscrn.c.
>

Problem with fseeko64() confirmed. Test example in attachment.
fseek() works OK in this example, fseeko64() do not

Andris


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 filename="fseeko64_test.cpp"

#include <cstdio>
#include <cstring>
#include <iostream>

int test1(bool useFseeko64)
{
        int numErr = 0;
	char b1[8192], b2[4096];
	FILE* input = std::fopen("/dev/env/DJDIR/bin/gcc.exe", "rb");
	//FILE* input = std::fopen("d:/djgpp/bin/gcc.exe", "rb");
	std::fread(b1, 8192, 1, input);
        for (int off = 0; off < 4095; off += 17) {
                if (useFseeko64) {
			fseeko64(input, off, SEEK_SET);
		} else {
			fseek(input, off, SEEK_SET);
		}
		std::fread(b2, 4096, 1, input);
		if (std::memcmp(b1 + off, b2, 4096) != 0) {
			numErr++;
		}
	}
	return numErr;
}

int main(void)
{
	std::cout << "fseek: " << test1(false) << " errors found" << std::endl;
	std::cout << "fseeko64: " << test1(true) << " errors found" << std::endl;
	return 0;
}

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