summaryrefslogtreecommitdiffstats
path: root/newlib/libc/stdlib/gdtoa-gethex.c
diff options
context:
space:
mode:
Diffstat (limited to 'newlib/libc/stdlib/gdtoa-gethex.c')
-rw-r--r--newlib/libc/stdlib/gdtoa-gethex.c351
1 files changed, 0 insertions, 351 deletions
diff --git a/newlib/libc/stdlib/gdtoa-gethex.c b/newlib/libc/stdlib/gdtoa-gethex.c
deleted file mode 100644
index 92f30fca0..000000000
--- a/newlib/libc/stdlib/gdtoa-gethex.c
+++ /dev/null
@@ -1,351 +0,0 @@
-/****************************************************************
-
-The author of this software is David M. Gay.
-
-Copyright (C) 1998 by Lucent Technologies
-All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and
-its documentation for any purpose and without fee is hereby
-granted, provided that the above copyright notice appear in all
-copies and that both that the copyright notice and this
-permission notice and warranty disclaimer appear in supporting
-documentation, and that the name of Lucent or any of its entities
-not be used in advertising or publicity pertaining to
-distribution of the software without specific, written prior
-permission.
-
-LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
-INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
-IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
-SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
-IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
-THIS SOFTWARE.
-
-****************************************************************/
-
-/* Please send bug reports to David M. Gay (dmg at acm dot org,
- * with " at " changed at "@" and " dot " changed to "."). */
-
-#include <_ansi.h>
-#include <reent.h>
-#include <string.h>
-#include "mprec.h"
-#include "gdtoa.h"
-#include "gd_qnan.h"
-
-#ifdef USE_LOCALE
-#include "locale.h"
-#endif
-
-unsigned char hexdig[256];
-
-static void
-_DEFUN (htinit, (h, s, inc),
- unsigned char *h _AND
- unsigned char *s _AND
- int inc)
-{
- int i, j;
- for(i = 0; (j = s[i]) !=0; i++)
- h[j] = i + inc;
-}
-
-void
-_DEFUN_VOID (hexdig_init)
-{
-#define USC (unsigned char *)
- htinit(hexdig, USC "0123456789", 0x10);
- htinit(hexdig, USC "abcdef", 0x10 + 10);
- htinit(hexdig, USC "ABCDEF", 0x10 + 10);
-}
-
-static void
-_DEFUN(rshift, (b, k),
- _Bigint *b _AND
- int k)
-{
- __ULong *x, *x1, *xe, y;
- int n;
-
- x = x1 = b->_x;
- n = k >> kshift;
- if (n < b->_wds) {
- xe = x + b->_wds;
- x += n;
- if (k &= kmask) {
- n = ULbits - k;
- y = *x++ >> k;
- while(x < xe) {
- *x1++ = (y | (*x << n)) & ALL_ON;
- y = *x++ >> k;
- }
- if ((*x1 = y) !=0)
- x1++;
- }
- else
- while(x < xe)
- *x1++ = *x++;
- }
- if ((b->_wds = x1 - b->_x) == 0)
- b->_x[0] = 0;
-}
-
-static _Bigint *
-_DEFUN (increment, (ptr, b),
- struct _reent *ptr _AND
- _Bigint *b)
-{
- __ULong *x, *xe;
- _Bigint *b1;
-#ifdef Pack_16
- __ULong carry = 1, y;
-#endif
-
- x = b->_x;
- xe = x + b->_wds;
-#ifdef Pack_32
- do {
- if (*x < (__ULong)0xffffffffL) {
- ++*x;
- return b;
- }
- *x++ = 0;
- } while(x < xe);
-#else
- do {
- y = *x + carry;
- carry = y >> 16;
- *x++ = y & 0xffff;
- if (!carry)
- return b;
- } while(x < xe);
- if (carry)
-#endif
- {
- if (b->_wds >= b->_maxwds) {
- b1 = Balloc(ptr, b->_k+1);
- Bcopy(b1, b);
- Bfree(ptr, b);
- b = b1;
- }
- b->_x[b->_wds++] = 1;
- }
- return b;
-}
-
-
-int
-_DEFUN(gethex, (ptr, sp, fpi, exp, bp, sign),
- struct _reent *ptr _AND
- _CONST char **sp _AND
- FPI *fpi _AND
- Long *exp _AND
- _Bigint **bp _AND
- int sign)
-{
- _Bigint *b;
- _CONST unsigned char *decpt, *s0, *s, *s1;
- int esign, havedig, irv, k, n, nbits, up, zret;
- __ULong L, lostbits, *x;
- Long e, e1;
-#ifdef USE_LOCALE
- unsigned char decimalpoint = *localeconv()->decimal_point;
-#else
-#define decimalpoint '.'
-#endif
-
- if (!hexdig['0'])
- hexdig_init();
- havedig = 0;
- s0 = *(_CONST unsigned char **)sp + 2;
- while(s0[havedig] == '0')
- havedig++;
- s0 += havedig;
- s = s0;
- decpt = 0;
- zret = 0;
- e = 0;
- if (!hexdig[*s]) {
- zret = 1;
- if (*s != decimalpoint)
- goto pcheck;
- decpt = ++s;
- if (!hexdig[*s])
- goto pcheck;
- while(*s == '0')
- s++;
- if (hexdig[*s])
- zret = 0;
- havedig = 1;
- s0 = s;
- }
- while(hexdig[*s])
- s++;
- if (*s == decimalpoint && !decpt) {
- decpt = ++s;
- while(hexdig[*s])
- s++;
- }
- if (decpt)
- e = -(((Long)(s-decpt)) << 2);
- pcheck:
- s1 = s;
- switch(*s) {
- case 'p':
- case 'P':
- esign = 0;
- switch(*++s) {
- case '-':
- esign = 1;
- /* no break */
- case '+':
- s++;
- }
- if ((n = hexdig[*s]) == 0 || n > 0x19) {
- s = s1;
- break;
- }
- e1 = n - 0x10;
- while((n = hexdig[*++s]) !=0 && n <= 0x19)
- e1 = 10*e1 + n - 0x10;
- if (esign)
- e1 = -e1;
- e += e1;
- }
- *sp = (char*)s;
- if (zret)
- return havedig ? STRTOG_Zero : STRTOG_NoNumber;
- n = s1 - s0 - 1;
- for(k = 0; n > 7; n >>= 1)
- k++;
- b = Balloc(ptr, k);
- x = b->_x;
- n = 0;
- L = 0;
- while(s1 > s0) {
- if (*--s1 == decimalpoint)
- continue;
- if (n == 32) {
- *x++ = L;
- L = 0;
- n = 0;
- }
- L |= (hexdig[*s1] & 0x0f) << n;
- n += 4;
- }
- *x++ = L;
- b->_wds = n = x - b->_x;
- n = 32*n - hi0bits(L);
- nbits = fpi->nbits;
- lostbits = 0;
- x = b->_x;
- if (n > nbits) {
- n -= nbits;
- if (any_on(b,n)) {
- lostbits = 1;
- k = n - 1;
- if (x[k>>kshift] & 1 << (k & kmask)) {
- lostbits = 2;
- if (k > 1 && any_on(b,k-1))
- lostbits = 3;
- }
- }
- rshift(b, n);
- e += n;
- }
- else if (n < nbits) {
- n = nbits - n;
- b = lshift(ptr, b, n);
- e -= n;
- x = b->_x;
- }
- if (e > fpi->emax) {
- ovfl:
- Bfree(ptr, b);
- *bp = 0;
- return STRTOG_Infinite | STRTOG_Overflow | STRTOG_Inexhi;
- }
- irv = STRTOG_Normal;
- if (e < fpi->emin) {
- irv = STRTOG_Denormal;
- n = fpi->emin - e;
- if (n >= nbits) {
- switch (fpi->rounding) {
- case FPI_Round_near:
- if (n == nbits && (n < 2 || any_on(b,n-1)))
- goto one_bit;
- break;
- case FPI_Round_up:
- if (!sign)
- goto one_bit;
- break;
- case FPI_Round_down:
- if (sign) {
- one_bit:
- *exp = fpi->emin;
- x[0] = b->_wds = 1;
- *bp = b;
- return STRTOG_Denormal | STRTOG_Inexhi
- | STRTOG_Underflow;
- }
- }
- Bfree(ptr, b);
- *bp = 0;
- return STRTOG_Zero | STRTOG_Inexlo | STRTOG_Underflow;
- }
- k = n - 1;
- if (lostbits)
- lostbits = 1;
- else if (k > 0)
- lostbits = any_on(b,k);
- if (x[k>>kshift] & 1 << (k & kmask))
- lostbits |= 2;
- nbits -= n;
- rshift(b,n);
- e = fpi->emin;
- }
- if (lostbits) {
- up = 0;
- switch(fpi->rounding) {
- case FPI_Round_zero:
- break;
- case FPI_Round_near:
- if ((lostbits & 2)
- && ((lostbits & 1) | (x[0] & 1)))
- up = 1;
- break;
- case FPI_Round_up:
- up = 1 - sign;
- break;
- case FPI_Round_down:
- up = sign;
- }
- if (up) {
- k = b->_wds;
- b = increment(ptr, b);
- x = b->_x;
- if (irv == STRTOG_Denormal) {
- if (nbits == fpi->nbits - 1
- && x[nbits >> kshift] & 1 << (nbits & kmask))
- irv = STRTOG_Normal;
- }
- else if ((b->_wds > k)
- || ((n = nbits & kmask) !=0
- && (hi0bits(x[k-1]) < 32-n))) {
- rshift(b,1);
- if (++e > fpi->emax)
- goto ovfl;
- }
- irv |= STRTOG_Inexhi;
- }
- else
- irv |= STRTOG_Inexlo;
- }
- *bp = b;
- *exp = e;
- return irv;
-}
-
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-01 12:05:47 +0000