| | 1 | /**************************************************************** |
| | 2 | |
| | 3 | The author of this software is David M. Gay. |
| | 4 | |
| | 5 | Copyright (C) 1998 by Lucent Technologies |
| | 6 | All Rights Reserved |
| | 7 | |
| | 8 | Permission to use, copy, modify, and distribute this software and |
| | 9 | its documentation for any purpose and without fee is hereby |
| | 10 | granted, provided that the above copyright notice appear in all |
| | 11 | copies and that both that the copyright notice and this |
| | 12 | permission notice and warranty disclaimer appear in supporting |
| | 13 | documentation, and that the name of Lucent or any of its entities |
| | 14 | not be used in advertising or publicity pertaining to |
| | 15 | distribution of the software without specific, written prior |
| | 16 | permission. |
| | 17 | |
| | 18 | LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| | 19 | INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. |
| | 20 | IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY |
| | 21 | SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| | 22 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER |
| | 23 | IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, |
| | 24 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF |
| | 25 | THIS SOFTWARE. |
| | 26 | |
| | 27 | ****************************************************************/ |
| | 28 | |
| | 29 | /* Please send bug reports to David M. Gay (dmg at acm dot org, |
| | 30 | * with " at " changed at "@" and " dot " changed to "."). */ |
| | 31 | |
| | 32 | #include "gdtoaimp.h" |
| | 33 | |
| | 34 | int |
| | 35 | #ifdef KR_headers |
| | 36 | strtoIg(s00, se, fpi, exp, B, rvp) CONST char *s00; char **se; FPI *fpi; Long *exp; Bigint **B; int *rvp; |
| | 37 | #else |
| | 38 | strtoIg(CONST char *s00, char **se, FPI *fpi, Long *exp, Bigint **B, int *rvp) |
| | 39 | #endif |
| | 40 | { |
| | 41 | Bigint *b, *b1; |
| | 42 | int i, nb, nw, nw1, rv, rv1, swap; |
| | 43 | unsigned int nb1, nb11; |
| | 44 | Long e1; |
| | 45 | |
| | 46 | b = *B; |
| | 47 | rv = strtodg(s00, se, fpi, exp, b->x); |
| | 48 | if (!(rv & STRTOG_Inexact)) { |
| | 49 | B[1] = 0; |
| | 50 | return *rvp = rv; |
| | 51 | } |
| | 52 | e1 = exp[0]; |
| | 53 | rv1 = rv ^ STRTOG_Inexact; |
| | 54 | b1 = Balloc(b->k); |
| | 55 | Bcopy(b1, b); |
| | 56 | nb = fpi->nbits; |
| | 57 | nb1 = nb & 31; |
| | 58 | nb11 = (nb1 - 1) & 31; |
| | 59 | nw = b->wds; |
| | 60 | nw1 = nw - 1; |
| | 61 | if (rv & STRTOG_Inexlo) { |
| | 62 | swap = 0; |
| | 63 | b1 = increment(b1); |
| | 64 | if ((rv & STRTOG_Retmask) == STRTOG_Zero) { |
| | 65 | if (fpi->sudden_underflow) { |
| | 66 | b1->x[0] = 0; |
| | 67 | b1->x[nw1] = 1L << nb11; |
| | 68 | rv1 += STRTOG_Normal - STRTOG_Zero; |
| | 69 | rv1 &= ~STRTOG_Underflow; |
| | 70 | goto swapcheck; |
| | 71 | } |
| | 72 | rv1 &= STRTOG_Inexlo | STRTOG_Underflow | STRTOG_Zero; |
| | 73 | rv1 |= STRTOG_Inexhi | STRTOG_Denormal; |
| | 74 | goto swapcheck; |
| | 75 | } |
| | 76 | if (b1->wds > nw |
| | 77 | || (nb1 && b1->x[nw1] & 1L << nb1)) { |
| | 78 | if (++e1 > fpi->emax) |
| | 79 | rv1 = STRTOG_Infinite | STRTOG_Inexhi; |
| | 80 | rshift(b1, 1); |
| | 81 | } |
| | 82 | else if ((rv & STRTOG_Retmask) == STRTOG_Denormal) { |
| | 83 | if (b1->x[nw1] & 1L << nb11) { |
| | 84 | rv1 += STRTOG_Normal - STRTOG_Denormal; |
| | 85 | rv1 &= ~STRTOG_Underflow; |
| | 86 | } |
| | 87 | } |
| | 88 | } |
| | 89 | else { |
| | 90 | swap = STRTOG_Neg; |
| | 91 | if ((rv & STRTOG_Retmask) == STRTOG_Infinite) { |
| | 92 | b1 = set_ones(b1, nb); |
| | 93 | e1 = fpi->emax; |
| | 94 | rv1 = STRTOG_Normal | STRTOG_Inexlo; |
| | 95 | goto swapcheck; |
| | 96 | } |
| | 97 | decrement(b1); |
| | 98 | if ((rv & STRTOG_Retmask) == STRTOG_Denormal) { |
| | 99 | for(i = nw1; !b1->x[i]; --i) |
| | 100 | if (!i) { |
| | 101 | rv1 = STRTOG_Zero | STRTOG_Inexlo; |
| | 102 | break; |
| | 103 | } |
| | 104 | goto swapcheck; |
| | 105 | } |
| | 106 | if (!(b1->x[nw1] & 1L << nb11)) { |
| | 107 | if (e1 == fpi->emin) { |
| | 108 | if (fpi->sudden_underflow) |
| | 109 | rv1 += STRTOG_Zero - STRTOG_Normal; |
| | 110 | else |
| | 111 | rv1 += STRTOG_Denormal - STRTOG_Normal; |
| | 112 | rv1 |= STRTOG_Underflow; |
| | 113 | } |
| | 114 | else { |
| | 115 | b1 = lshift(b1, 1); |
| | 116 | b1->x[0] |= 1; |
| | 117 | --e1; |
| | 118 | } |
| | 119 | } |
| | 120 | } |
| | 121 | swapcheck: |
| | 122 | if (swap ^ (rv & STRTOG_Neg)) { |
| | 123 | rvp[0] = rv1; |
| | 124 | rvp[1] = rv; |
| | 125 | B[0] = b1; |
| | 126 | B[1] = b; |
| | 127 | exp[1] = exp[0]; |
| | 128 | exp[0] = e1; |
| | 129 | } |
| | 130 | else { |
| | 131 | rvp[0] = rv; |
| | 132 | rvp[1] = rv1; |
| | 133 | B[1] = b1; |
| | 134 | exp[1] = e1; |
| | 135 | } |
| | 136 | return rv; |
| | 137 | } |
projects / apple / libc.git / blame_incremental