351 lines
6.7 KiB
C
351 lines
6.7 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/*%% (c) Copyright 1993, 1994 Hewlett-Packard Company */
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/*%% (c) Copyright 1993, 1994 International Business Machines Corp. */
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/*%% (c) Copyright 1993, 1994 Sun Microsystems, Inc. */
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/*%% (c) Copyright 1993, 1994 Novell, Inc. */
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/*%% $XConsortium: isdatconv.c /main/3 1995/10/23 11:37:16 rswiston $ */
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#ifndef lint
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static char sccsid[] = "@(#)isdatconv.c 1.5 89/07/17 Copyr 1988 Sun Micro";
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#endif
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/*
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* Copyright (c) 1988 by Sun Microsystems, Inc.
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*/
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/*
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* isdatconv.c
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*
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* Description:
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* Conversion function between machine dependent and the X/OPEN
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* machine independent formats.
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*
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* Some pieces of code may not be very "structured", but they result in
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* optimized code with the -O compiler option.
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*
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*/
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#include "isam_impl.h"
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#define BLANK ' '
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/* conversion functions for sparc architecture */
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/* ldlong() - Load a long integer from a potentially unaligned address */
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long
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ldlong(p)
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register char *p;
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{
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int i;
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#if LONG_BIT == 64
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register unsigned long val;
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#else
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register unsigned int val;
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#endif
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val = 0;
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for (i=0; i<LONGSIZE ; i++)
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val = (val << 8) + *((unsigned char *)p++);
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return ((long)val);
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}
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/* stlong() - Store a long integer at a potentially unaligned address */
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int
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stlong(val, p)
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register long val;
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register char *p;
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{
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int i;
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p += LONGSIZE;
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for (i=0; i<LONGSIZE ; i++)
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*--p = (val >> 8*i) & 255;
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return(0);
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}
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/* ldint() - Load a short integer from a potentially unaligned address */
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short
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ldint(p)
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register char *p;
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{
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register unsigned int val;
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val = *((unsigned char *)p++);
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val = (val << 8) + *((unsigned char *)p++);
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return ((short)val);
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}
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/* ldunshort - load a unshort integer : for 64K record length */
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u_short
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ldunshort(p)
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register char *p;
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{
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register unsigned int val;
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val = *((unsigned char *)p++);
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val = (val << 8) + *((unsigned char *)p++);
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return ((u_short)val);
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}
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/* stint() - Store a short integer at a potentially unaligned address */
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int
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stint(val, p)
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register short val;
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register char *p;
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{
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p += SHORTSIZE;
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*--p = val & 255;
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*--p = (val >> 8) & 255;
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return(0);
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}
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/* ldchar() - Load character field */
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int
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ldchar(src, len, dst)
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char *src;
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register char *dst;
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int len;
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{
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register char *p;
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if (len <= 0)
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return 0;
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/* Load the entire string. */
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memcpy((void *) dst, (const void *) src, len);
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/* Remove trailing blanks. */
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p = dst + len;
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while (--p >= dst) {
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if (*p != BLANK) {
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break;
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}
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}
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*++p = '\0';
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return 0;
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}
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int
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stchar(src, dst, len)
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register char *src;
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register char *dst;
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register int len;
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{
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register char c;
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if (len <= 0)
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return 0;
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/* Copy up to NULL character. */
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do {
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if ((c = *src++) == '\0')
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break;
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*dst++ = c;
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} while (--len > 0);
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/* Pad with blanks. */
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if (len > 0)
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(void) memset((void *) dst, BLANK, len);
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return 0;
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}
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/* ldchar2() - Load character field (C style, NULL padded) */
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int
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ldchar2(src, len, dst)
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char *src;
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register char *dst;
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int len;
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{
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register char *p;
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if (len <= 0)
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return 0;
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/* Load the entire string. */
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memcpy((void *) dst, (const void *) src, len);
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*(dst + len) = '\0';
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return 0;
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}
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int
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stchar2(src, dst, len)
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register char *src;
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register char *dst;
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register int len;
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{
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register char c;
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if (len <= 0)
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return 0;
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/* Copy up to a NULL character. */
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do {
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if ((c = *src++) == '\0')
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break;
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*dst++ = c;
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} while (--len > 0);
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/* Pad with NULLs. */
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if (len > 0)
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memset(dst, 0, len);
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return 0;
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}
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/* ldfloat() - Load a float number from a potentially unaligned address */
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float
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ldfloat(p)
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register char *p;
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{
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union {
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float fval;
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int ival;
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} uval;
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register unsigned int val;
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val = *((unsigned char *)p++);
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val = (val << 8) + *((unsigned char *)p++);
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val = (val << 8) + *((unsigned char *)p++);
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val = (val << 8) + *((unsigned char *)p++);
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uval.ival = val;
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return (uval.fval);
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}
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/* stfloat() - Store a float number at a potentially unaligned address */
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int
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stfloat(f, p)
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float f; /* Bug - it is passed as double */
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register char *p;
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{
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register unsigned val;
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union {
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float fval;
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int ival;
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} uval;
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uval.fval = f; /* This fixes compiler bug */
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val = uval.ival;
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p += LONGSIZE;
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*--p = val & 255;
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*--p = (val >> 8) & 255;
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*--p = (val >> 16) & 255;
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*--p = (val >> 24) & 255;
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return(0);
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}
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#if sparc | mc68000 /* MRJ */
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/* ldbld() - Load a double float number from a potentially unaligned address */
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double
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lddbl(p)
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register char *p;
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{
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double val;
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memcpy((void *)&val, (const void *) p, DOUBLESIZE);
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return (val);
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}
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/* stdbl() - Store a double float number at a potentially unaligned address */
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int
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stdbl(val, p)
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double val;
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register char *p;
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{
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memcpy ( p,(char *)&val, DOUBLESIZE);
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return 0;
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}
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#else /* 386i -- do it the long way round.... */
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/* ldbld() - Load a double float number from a potentially unaligned address */
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double
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lddbl(p)
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register char *p;
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{
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union {
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double rval;
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char sval[DOUBLESIZE];
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} x;
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char *q;
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int i;
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q = x.sval;
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p += DOUBLESIZE;
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for (i=0; i<DOUBLESIZE; i++)
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*q++ = *--p;
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return (x.rval);
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}
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/* stdbl() - Store a double float number at a potentially unaligned address */
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int
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stdbl(val, p)
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double val;
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register char *p;
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{
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union {
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double rval;
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char sval[DOUBLESIZE];
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} x;
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char *q;
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int i;
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x.rval = val;
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q = x.sval;
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p += DOUBLESIZE;
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for (i=0; i<DOUBLESIZE; i++)
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*--p = *q++ ;
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return(0);
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}
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#endif /* sparc */
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