tree b25a8dab6192fe6bf382811017a66b310f2dfe7f
parent df6c08b9ffe49fc5501cdded0e3da832b0921bf6
author Liu Hao <lh_mouse@126.com> 1595427541 +0800
committer Liu Hao <lh_mouse@126.com> 1595427541 +0800

crt/stdio/fseeki64: Copy-n-paste from `f{tell,seek}o64()`

The old implementation of `_ftelli64()` was introduced in 518dd33c326 in
2007. However it sometimes reports incorrect values. This program, after
being compiled with `i686-w64-mingw32-gcc`, outputs `-15` on the second
line on my Windows 7 Professional:

    #include <stdio.h>
    #include <assert.h>

    int main(void)
      {
        FILE* fp = fopen(__FILE__, "rb");
        assert(fp);
        printf("offset = %lld\n", (long long)_ftelli64(fp));

        char buf[1];
        ssize_t nread = fread(&buf, 1, 1, fp);
        assert(nread == 1);
        printf("offset = %lld\n", (long long)_ftelli64(fp));

        fclose(fp);
      }

This is apparently incorrect, as file offsets can't be negative.

If it was compiled with `x86_64-w64-mingw32-gcc`, it however outputs `1`
as expected.

Since 4d3b28a992, we have had 64-bit tell/seek functions. They should be
used to de-duplicate these implementations.

Signed-off-by: Liu Hao <lh_mouse@126.com>