1 : // Copyright 2010 the V8 project authors. All rights reserved.
2 : // Redistribution and use in source and binary forms, with or without
3 : // modification, are permitted provided that the following conditions are
4 : // met:
5 : //
6 : // * Redistributions of source code must retain the above copyright
7 : // notice, this list of conditions and the following disclaimer.
8 : // * Redistributions in binary form must reproduce the above
9 : // copyright notice, this list of conditions and the following
10 : // disclaimer in the documentation and/or other materials provided
11 : // with the distribution.
12 : // * Neither the name of Google Inc. nor the names of its
13 : // contributors may be used to endorse or promote products derived
14 : // from this software without specific prior written permission.
15 : //
16 : // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 : // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 : // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 : // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 : // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 : // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 : // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 : // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 : // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 : // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 : // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 :
28 : // MOZ: this file was called dtoa.cc, but that clashed in the build with
29 : // the file dtoa.c in SpiderMonkey, so this file was renamed v8-dtoa.cc.
30 :
31 : #include <math.h>
32 :
33 : #include "v8.h"
34 : #include "dtoa.h"
35 : #include "double.h"
36 : #include "fast-dtoa.h"
37 :
38 : namespace v8 {
39 : namespace internal {
40 :
41 257335 : bool DoubleToAscii(double v, DtoaMode mode, int requested_digits,
42 : Vector<char> buffer, int* sign, int* length, int* point) {
43 257335 : ASSERT(!Double(v).IsSpecial());
44 257335 : ASSERT(mode == DTOA_SHORTEST || requested_digits >= 0);
45 :
46 257335 : if (Double(v).Sign() < 0) {
47 45014 : *sign = 1;
48 45014 : v = -v;
49 : } else {
50 212321 : *sign = 0;
51 : }
52 :
53 257335 : if (v == 0) {
54 0 : buffer[0] = '0';
55 0 : buffer[1] = '\0';
56 0 : *length = 1;
57 0 : *point = 1;
58 0 : return true;
59 : }
60 :
61 257335 : if (mode == DTOA_PRECISION && requested_digits == 0) {
62 0 : buffer[0] = '\0';
63 0 : *length = 0;
64 0 : return true;
65 : }
66 :
67 257335 : switch (mode) {
68 : case DTOA_SHORTEST:
69 257335 : return FastDtoa(v, buffer, length, point);
70 : case DTOA_FIXED:
71 : // MOZ: should never happen.
72 : //return FastFixedDtoa(v, requested_digits, buffer, length, point);
73 : default:
74 : break;
75 : }
76 0 : return false;
77 : }
78 :
79 : } } // namespace v8::internal
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