| | 1 | /**************************************************************** |
| | 2 | |
| | 3 | The author of this software is David M. Gay. |
| | 4 | |
| | 5 | Copyright (C) 1998, 2000 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 "xlocale_private.h" |
| | 33 | |
| | 34 | #include "gdtoaimp.h" |
| | 35 | |
| | 36 | float |
| | 37 | #ifdef KR_headers |
| | 38 | strtof_l(s, sp, loc) CONST char *s; char **sp; locale_t loc; |
| | 39 | #else |
| | 40 | strtof_l(CONST char *s, char **sp, locale_t loc) |
| | 41 | #endif |
| | 42 | { |
| | 43 | static CONST FPI fpi0 = { 24, 1-127-24+1, 254-127-24+1, 1, SI }; |
| | 44 | ULong bits[1]; |
| | 45 | Long exp; |
| | 46 | int k; |
| | 47 | union { ULong L[1]; float f; } u; |
| | 48 | #ifdef Honor_FLT_ROUNDS |
| | 49 | #include "gdtoa_fltrnds.h" |
| | 50 | #else |
| | 51 | #define fpi &fpi0 |
| | 52 | #endif |
| | 53 | |
| | 54 | NORMALIZE_LOCALE(loc); |
| | 55 | k = strtodg(s, sp, fpi, &exp, bits, loc); |
| | 56 | switch(k & STRTOG_Retmask) { |
| | 57 | case STRTOG_NoNumber: |
| | 58 | u.L[0] = 0; |
| | 59 | return u.f; // avoid setting sign |
| | 60 | |
| | 61 | case STRTOG_Zero: |
| | 62 | u.L[0] = 0; |
| | 63 | break; |
| | 64 | |
| | 65 | case STRTOG_Normal: |
| | 66 | case STRTOG_NaNbits: |
| | 67 | u.L[0] = (bits[0] & 0x7fffff) | ((exp + 0x7f + 23) << 23); |
| | 68 | break; |
| | 69 | |
| | 70 | case STRTOG_Denormal: |
| | 71 | u.L[0] = bits[0]; |
| | 72 | break; |
| | 73 | |
| | 74 | case STRTOG_Infinite: |
| | 75 | u.L[0] = 0x7f800000; |
| | 76 | break; |
| | 77 | |
| | 78 | case STRTOG_NaN: |
| | 79 | u.L[0] = f_QNAN; |
| | 80 | } |
| | 81 | if (k & STRTOG_Neg) |
| | 82 | u.L[0] |= 0x80000000L; |
| | 83 | return u.f; |
| | 84 | } |
| | 85 | |
| | 86 | float |
| | 87 | #ifdef KR_headers |
| | 88 | strtof(s, sp) CONST char *s; char **sp; |
| | 89 | #else |
| | 90 | strtof(CONST char *s, char **sp) |
| | 91 | #endif |
| | 92 | { |
| | 93 | return strtof_l(s, sp, __current_locale()); |
| | 94 | } |
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