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8178f883a5
This is actually worthwhile; I found and fixed a few bugs/edge cases while doing this. For more information on LCLint, see <http://lclint.cs.virginia.edu/>. svn path=/trunk/yasm/; revision=335
57 lines
2.1 KiB
C
57 lines
2.1 KiB
C
/* $IdPath$
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* Floating point number functions header file.
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*
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* Copyright (C) 2001 Peter Johnson
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*
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* Based on public-domain x86 assembly code by Randall Hyde (8/28/91).
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*
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* This file is part of YASM.
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*
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* YASM is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* YASM is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef YASM_FLOATNUM_H
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#define YASM_FLOATNUM_H
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/*@only@*/ floatnum *floatnum_new(const char *str);
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/*@only@*/ floatnum *floatnum_copy(const floatnum *flt);
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void floatnum_delete(/*@only@*/ floatnum *flt);
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/* calculation function: acc = acc op operand */
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void floatnum_calc(floatnum *acc, ExprOp op, floatnum *operand);
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/* The get functions return nonzero if flt can't fit into that size format:
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* -1 if underflow occurred, 1 if overflow occurred.
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*/
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/* Essentially a convert to single-precision and return as 32-bit value.
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* The 32-bit value is a "standard" C value (eg, of unknown endian).
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*/
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int floatnum_get_int(const floatnum *flt, /*@out@*/ unsigned long *ret_val);
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/* ptr will point to the Intel-format little-endian byte string after a
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* successful call (eg, [0] should be the first byte output to the file).
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*/
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int floatnum_get_sized(const floatnum *flt, /*@out@*/ unsigned char *ptr,
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size_t size);
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/* Basic check to see if size is even valid for flt conversion (doesn't
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* actually check for underflow/overflow but rather checks for size=4,8,10).
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* Returns 1 if valid, 0 if not.
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*/
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int floatnum_check_size(const floatnum *flt, size_t size);
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void floatnum_print(const floatnum *flt);
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#endif
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