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Neither Open Software * Foundation, Inc., Hewlett-Packard Company nor Digital * Equipment Corporation makes any representations about the suitability * of this software for any purpose. * * Copyright (c) 2007, Novell, Inc. All rights reserved. * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of Novell Inc. nor the names of its contributors * may be used to endorse or promote products derived from this * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * @APPLE_LICENSE_HEADER_END@ */ /* ** ** NAME: ** ** pkvaxg.c.h ** ** FACILITY: ** ** IDL Stub Runtime Support ** ** ABSTRACT: ** ** This module contains code to extract information from an ** UNPACKED_REAL structure and to create a VAX g_floating number ** with those bits. ** ** This module is meant to be used as an include file. ** ** VERSION: DCE 1.0 ** */ #if HAVE_CONFIG_H #include <config.h> #endif /* **++ ** Functional Description: ** ** This module contains code to extract information from an ** UNPACKED_REAL structure and to create a VAX g_floating number ** with those bits. ** ** See the header files for a description of the UNPACKED_REAL ** structure. ** ** A VAX g_floating number in (16 bit words) looks like: ** ** [0]: Sign bit, 11 exp bits (bias 1024), 4 fraction bits ** [1]: 16 more fraction bits ** [2]: 16 more fraction bits ** [3]: 16 more fraction bits ** ** 0.5 <= fraction < 1.0, MSB implicit ** ** ** Implicit parameters: ** ** options: a word of flags, see include files. ** ** output_value: a pointer to the input parameter. ** ** r: an UNPACKED_REAL structure. ** **-- */ if (r[U_R_FLAGS] & U_R_UNUSUAL) { if (r[U_R_FLAGS] & U_R_ZERO) memcpy(output_value, VAX_G_ZERO, 8); else if (r[U_R_FLAGS] & U_R_INFINITY) { memcpy(output_value, VAX_G_INVALID, 8); if (r[U_R_FLAGS] & U_R_NEGATIVE) { DCETHREAD_RAISE(dcethread_aritherr_e); /* Negative infinity */ } else { DCETHREAD_RAISE(dcethread_aritherr_e); /* Positive infinity */ } } else if (r[U_R_FLAGS] & U_R_INVALID) { memcpy(output_value, VAX_G_INVALID, 8); DCETHREAD_RAISE(dcethread_aritherr_e); /* Invalid value */ } } else { round_bit_position = 53; #include "round.c.h" if (r[U_R_EXP] < (U_R_BIAS - 1023)) { /* Underflow */ memcpy(output_value, VAX_G_ZERO, 8); if (options & CVT_C_ERR_UNDERFLOW) { DCETHREAD_RAISE(dcethread_fltund_e); /* Underflow */ } } else if (r[U_R_EXP] > (U_R_BIAS + 1023)) { /* Overflow */ if (options & CVT_C_TRUNCATE) { if (r[U_R_FLAGS] & U_R_NEGATIVE) memcpy(output_value, VAX_G_NEG_HUGE, 8); else memcpy(output_value, VAX_G_POS_HUGE, 8); } else if ((options & CVT_C_ROUND_TO_POS) && (r[U_R_FLAGS] & U_R_NEGATIVE)) { memcpy(output_value, VAX_G_NEG_HUGE, 8); } else if ((options & CVT_C_ROUND_TO_NEG) && !(r[U_R_FLAGS] & U_R_NEGATIVE)) { memcpy(output_value, VAX_G_POS_HUGE, 8); } else { memcpy(output_value, VAX_G_INVALID, 8); } DCETHREAD_RAISE(dcethread_fltovf_e); /* Overflow */ } else { /* Adjust bias of exponent */ r[U_R_EXP] -= (U_R_BIAS - 1024); /* Make room for exponent and sign bit */ r[2] >>= 11; r[2] |= (r[1] << 21); r[1] >>= 11; /* Clear implicit bit */ r[1] &= 0x000FFFFFL; /* OR in exponent and sign bit */ r[1] |= (r[U_R_EXP] << 20); r[1] |= (r[U_R_FLAGS] << 31); /* Adjust for VAX 16 bit floating format */ r[1] = ((r[1] << 16) | (r[1] >> 16)); r[2] = ((r[2] << 16) | (r[2] >> 16)); memcpy(output_value, &r[1], 8); } }