1 // Copyright 2011 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
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.
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13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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30 #include "../include/v8stdint.h"
36 #include "bignum-dtoa.h"
38 #include "fast-dtoa.h"
39 #include "fixed-dtoa.h"
44 static BignumDtoaMode DtoaToBignumDtoaMode(DtoaMode dtoa_mode) {
46 case DTOA_SHORTEST: return BIGNUM_DTOA_SHORTEST;
47 case DTOA_FIXED: return BIGNUM_DTOA_FIXED;
48 case DTOA_PRECISION: return BIGNUM_DTOA_PRECISION;
51 return BIGNUM_DTOA_SHORTEST; // To silence compiler.
56 void DoubleToAscii(double v, DtoaMode mode, int requested_digits,
57 Vector<char> buffer, int* sign, int* length, int* point) {
58 ASSERT(!Double(v).IsSpecial());
59 ASSERT(mode == DTOA_SHORTEST || requested_digits >= 0);
61 if (Double(v).Sign() < 0) {
76 if (mode == DTOA_PRECISION && requested_digits == 0) {
85 fast_worked = FastDtoa(v, FAST_DTOA_SHORTEST, 0, buffer, length, point);
88 fast_worked = FastFixedDtoa(v, requested_digits, buffer, length, point);
91 fast_worked = FastDtoa(v, FAST_DTOA_PRECISION, requested_digits,
92 buffer, length, point);
98 if (fast_worked) return;
100 // If the fast dtoa didn't succeed use the slower bignum version.
101 BignumDtoaMode bignum_mode = DtoaToBignumDtoaMode(mode);
102 BignumDtoa(v, bignum_mode, requested_digits, buffer, length, point);
103 buffer[*length] = '\0';
106 } } // namespace v8::internal