123 lines
2.7 KiB
C
123 lines
2.7 KiB
C
/*
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* This source code may contain confidential information of QNX Software
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* Systems Ltd. (QSSL) and its licensors. Any use, reproduction,
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* modification, disclosure, distribution or transfer of this software,
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* or any software which includes or is based upon any of this code, is
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* prohibited unless expressly authorized by QSSL by written agreement. For
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* more information (including whether this source code file has been
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* published) please email licensing@qnx.com.
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*/
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/* ucl_str.c -- string functions for the the UCL library
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This file is part of the UCL real-time data compression library.
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Copyright (C) 1996-2000 Markus Franz Xaver Johannes Oberhumer
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Markus F.X.J. Oberhumer
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<markus.oberhumer@jk.uni-linz.ac.at>
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http://wildsau.idv.uni-linz.ac.at/mfx/ucl.html
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*/
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#include "ucl_conf.h"
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/***********************************************************************
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// slow but portable <string.h> stuff, only used in assertions
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************************************************************************/
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UCL_PUBLIC(int)
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ucl_memcmp(const ucl_voidp s1, const ucl_voidp s2, ucl_uint len)
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{
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#if (UCL_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMCMP)
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return memcmp(s1,s2,len);
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#else
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const ucl_byte *p1 = (const ucl_byte *) s1;
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const ucl_byte *p2 = (const ucl_byte *) s2;
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int d;
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if (len > 0) do
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{
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d = *p1 - *p2;
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if (d != 0)
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return d;
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p1++;
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p2++;
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}
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while (--len > 0);
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return 0;
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#endif
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}
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UCL_PUBLIC(ucl_voidp)
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ucl_memcpy(ucl_voidp dest, const ucl_voidp src, ucl_uint len)
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{
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#if (UCL_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMCPY)
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return memcpy(dest,src,len);
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#else
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ucl_byte *p1 = (ucl_byte *) dest;
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const ucl_byte *p2 = (const ucl_byte *) src;
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if (len <= 0 || p1 == p2)
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return dest;
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do
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*p1++ = *p2++;
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while (--len > 0);
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return dest;
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#endif
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}
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UCL_PUBLIC(ucl_voidp)
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ucl_memmove(ucl_voidp dest, const ucl_voidp src, ucl_uint len)
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{
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#if (UCL_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMMOVE)
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return memmove(dest,src,len);
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#else
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ucl_byte *p1 = (ucl_byte *) dest;
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const ucl_byte *p2 = (const ucl_byte *) src;
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if (len <= 0 || p1 == p2)
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return dest;
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if (p1 < p2)
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{
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do
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*p1++ = *p2++;
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while (--len > 0);
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}
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else
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{
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p1 += len;
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p2 += len;
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do
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*--p1 = *--p2;
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while (--len > 0);
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}
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return dest;
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#endif
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}
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UCL_PUBLIC(ucl_voidp)
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ucl_memset(ucl_voidp s, int c, ucl_uint len)
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{
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#if (UCL_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMSET)
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return memset(s,c,len);
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#else
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ucl_byte *p = (ucl_byte *) s;
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if (len > 0) do
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*p++ = UCL_BYTE(c);
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while (--len > 0);
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return s;
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#endif
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}
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/*
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vi:ts=4:et
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*/
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