Category : C Source Code
Archive   : ECSTR.ZIP
Filename : MEMTRANS.C

 
Output of file : MEMTRANS.C contained in archive : ECSTR.ZIP
/* File : memtrans.c
Author : Richard A. O'Keefe.
Updated: 2 June 1984
Defines: memtrans()

memtrans(dst, src, from, to, len)
copies exactly len characters from src[] to dst[], translating chars
in from[] to corresponding characters in to[]. From[] and to[] are
handled by _str2map. BEWARE: _str2map normally expects characters in
the range 0..127. The Vax MOVTC instruction thinks its table is 256
bytes long; if you want to translate arbitrary bytes you'd better be
sure that the _map_vec array is 256 bytes long. As distributed, the
memtrans function is only for translating ASCII (to 8-bit codes).

The VaxAsm code can only handle 0 <= len < 2^16, and is presented as
usual for your interest and amusement. Why *do* designers of 32-bit
machines put 16-bit limits on strings? (Dec aren't the only ones.)
*/

#include "strings.h"
#include "_str2map.h"

#if VaxAsm

void memtrans(dst, src, from, to, len)
_char_ *dst, *src, *from, *to;
int len;
{
_str2map(0, from, to);
asm("movtc 20(ap),*8(ap),$0,__map_vec,20(ap),*4(ap)");
}

#else ~VaxAsm

void memtrans(dst, src, from, to, len)
register _char_ *dst, *src;
_char_ *from, *to;
register int len;
{
_str2map(0, from, to);
while (--len >= 0) *dst++ = _map_vec[*src++];
}

#endif VaxAsm



  3 Responses to “Category : C Source Code
Archive   : ECSTR.ZIP
Filename : MEMTRANS.C

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/