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B19.1: memcpy bug (NT)
- To: gnu-win32 at cygnus dot com
- Subject: B19.1: memcpy bug (NT)
- From: "Vincent S. Perun" <Vincent dot S dot Perun at jpl dot nasa dot gov>
- Date: Fri, 21 Aug 1998 07:53:42 -0700 (PDT)
Hello. I've discovered a bug with memcpy under beta 19.1 and NT 4.0. It
seems the contents of a char array don't copy into an int in the right order:
The bytes are reversed! This test expects the output to be "ABCD" but it
puts out "CDAB". A char to char memcpy works just fine!
Vincent Perun
Test program:
main()
{
unsigned char s1[2] = {0xAB, 0xCD};
unsigned short n;
unsigned char s2[2];
memcpy (&n, &s1, 2);
printf ("n: %4.4X\n", n);
memcpy (&s2, &s1, 2);
printf ("s2: %2.2X%2.2X\n", s2[0], s2[1]);
}
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