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ccnative.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*           Copyright (c) 1985-2007 AT&T Knowledge Ventures            *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                      by AT&T Knowledge Ventures                      *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Phong Vo <kpv@research.att.com>                    *
*                                                                      *
***********************************************************************/
#pragma prototyped

/*
 * Glenn Fowler
 * AT&T Research
 *
 * copy table with element size n
 * indexed by CC_ASCII to table
 * indexed by CC_NATIVE
 */

#include <ast.h>
#include <ccode.h>

void*
ccnative(void* b, const void* a, size_t n)
{
#if CC_ASCII == CC_NATIVE
      return memcpy(b, a, n * (UCHAR_MAX + 1));
#else
      register int                  c;
      register const unsigned char* m;
      register unsigned char*       cb = (unsigned char*)b;
      register unsigned char*       ca = (unsigned char*)a;

      m = CCMAP(CC_ASCII, CC_NATIVE);
      if (n == sizeof(char))
            for (c = 0; c <= UCHAR_MAX; c++)
                  cb[c] = ca[m[c]];
      else
            for (c = 0; c <= UCHAR_MAX; c++)
                  memcpy(cb + n * c, ca + n * m[c], n);
      return b;
#endif
}

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