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// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <cmath>
#include "../include/v8stdint.h"
#include "checks.h"
#include "utils.h"
#include "dtoa.h"
#include "bignum-dtoa.h"
#include "double.h"
#include "fast-dtoa.h"
#include "fixed-dtoa.h"
namespace v8 {
namespace internal {
static BignumDtoaMode DtoaToBignumDtoaMode(DtoaMode dtoa_mode) {
switch (dtoa_mode) {
case DTOA_SHORTEST: return BIGNUM_DTOA_SHORTEST;
case DTOA_FIXED: return BIGNUM_DTOA_FIXED;
case DTOA_PRECISION: return BIGNUM_DTOA_PRECISION;
default:
UNREACHABLE();
return BIGNUM_DTOA_SHORTEST; // To silence compiler.
}
}
void DoubleToAscii(double v, DtoaMode mode, int requested_digits,
Vector<char> buffer, int* sign, int* length, int* point) {
ASSERT(!Double(v).IsSpecial());
ASSERT(mode == DTOA_SHORTEST || requested_digits >= 0);
if (Double(v).Sign() < 0) {
*sign = 1;
v = -v;
} else {
*sign = 0;
}
if (v == 0) {
buffer[0] = '0';
buffer[1] = '\0';
*length = 1;
*point = 1;
return;
}
if (mode == DTOA_PRECISION && requested_digits == 0) {
buffer[0] = '\0';
*length = 0;
return;
}
bool fast_worked;
switch (mode) {
case DTOA_SHORTEST:
fast_worked = FastDtoa(v, FAST_DTOA_SHORTEST, 0, buffer, length, point);
break;
case DTOA_FIXED:
fast_worked = FastFixedDtoa(v, requested_digits, buffer, length, point);
break;
case DTOA_PRECISION:
fast_worked = FastDtoa(v, FAST_DTOA_PRECISION, requested_digits,
buffer, length, point);
break;
default:
UNREACHABLE();
fast_worked = false;
}
if (fast_worked) return;
// If the fast dtoa didn't succeed use the slower bignum version.
BignumDtoaMode bignum_mode = DtoaToBignumDtoaMode(mode);
BignumDtoa(v, bignum_mode, requested_digits, buffer, length, point);
buffer[*length] = '\0';
}
} } // namespace v8::internal
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