GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/gdtoa/hexnan.c Lines: 0 67 0.0 %
Date: 2017-11-13 Branches: 0 64 0.0 %

Line Branch Exec Source
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/****************************************************************
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The author of this software is David M. Gay.
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Copyright (C) 2000 by Lucent Technologies
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and
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its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of Lucent or any of its entities
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not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior
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permission.
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LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
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IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
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SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
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IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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THIS SOFTWARE.
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****************************************************************/
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/* Please send bug reports to David M. Gay (dmg at acm dot org,
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 * with " at " changed at "@" and " dot " changed to ".").	*/
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#include "gdtoaimp.h"
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 static void
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#ifdef KR_headers
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L_shift(x, x1, i) ULong *x; ULong *x1; int i;
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#else
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L_shift(ULong *x, ULong *x1, int i)
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#endif
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{
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	int j;
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	i = 8 - i;
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	i <<= 2;
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	j = ULbits - i;
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	do {
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		*x |= x[1] << j;
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		x[1] >>= i;
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		} while(++x < x1);
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	}
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 int
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#ifdef KR_headers
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hexnan(sp, fpi, x0)
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	CONST char **sp; FPI *fpi; ULong *x0;
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#else
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hexnan( CONST char **sp, FPI *fpi, ULong *x0)
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#endif
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{
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	ULong c, h, *x, *x1, *xe;
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	CONST char *s;
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	int havedig, hd0, i, nbits;
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	if (!hexdig['0'])
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		__hexdig_init_D2A();
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	nbits = fpi->nbits;
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	x = x0 + (nbits >> kshift);
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	if (nbits & kmask)
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		x++;
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	*--x = 0;
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	x1 = xe = x;
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	havedig = hd0 = i = 0;
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	s = *sp;
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	/* allow optional initial 0x or 0X */
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	while((c = *(CONST unsigned char*)(s+1)) && c <= ' ')
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		++s;
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	if (s[1] == '0' && (s[2] == 'x' || s[2] == 'X')
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	 && *(CONST unsigned char*)(s+3) > ' ')
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		s += 2;
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	while((c = *(CONST unsigned char*)++s)) {
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		if (!(h = hexdig[c])) {
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			if (c <= ' ') {
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				if (hd0 < havedig) {
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					if (x < x1 && i < 8)
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						L_shift(x, x1, i);
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					if (x <= x0) {
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						i = 8;
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						continue;
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						}
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					hd0 = havedig;
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					*--x = 0;
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					x1 = x;
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					i = 0;
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					}
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				while(*(CONST unsigned char*)(s+1) <= ' ')
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					++s;
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				if (s[1] == '0' && (s[2] == 'x' || s[2] == 'X')
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				 && *(CONST unsigned char*)(s+3) > ' ')
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					s += 2;
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				continue;
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				}
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			if (/*(*/ c == ')' && havedig) {
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				*sp = s + 1;
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				break;
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				}
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#ifndef GDTOA_NON_PEDANTIC_NANCHECK
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			do {
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				if (/*(*/ c == ')') {
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					*sp = s + 1;
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					break;
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					}
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				} while((c = *++s));
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#endif
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			return STRTOG_NaN;
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			}
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		havedig++;
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		if (++i > 8) {
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			if (x <= x0)
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				continue;
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			i = 1;
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			*--x = 0;
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			}
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		*x = (*x << 4) | (h & 0xf);
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		}
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	if (!havedig)
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		return STRTOG_NaN;
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	if (x < x1 && i < 8)
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		L_shift(x, x1, i);
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	if (x > x0) {
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		x1 = x0;
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		do *x1++ = *x++;
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			while(x <= xe);
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		do *x1++ = 0;
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			while(x1 <= xe);
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		}
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	else {
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		/* truncate high-order word if necessary */
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		if ( (i = nbits & (ULbits-1)) !=0)
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			*xe &= ((ULong)0xffffffff) >> (ULbits - i);
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		}
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	for(x1 = xe;; --x1) {
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		if (*x1 != 0)
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			break;
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		if (x1 == x0) {
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			*x1 = 1;
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			break;
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			}
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		}
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	return STRTOG_NaNbits;
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	}