зеркало из https://github.com/mozilla/gecko-dev.git
57 строки
1.9 KiB
C++
57 строки
1.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "nsExceptionHandlerUtils.h"
|
|
|
|
#include "double-conversion/double-conversion.h"
|
|
|
|
// Format a non-negative double to a string, without using C-library functions,
|
|
// which need to be avoided (.e.g. bug 1240160, comment 10). Return false if
|
|
// we failed to get the formatting done correctly.
|
|
bool SimpleNoCLibDtoA(double aValue, char* aBuffer, int aBufferLength)
|
|
{
|
|
// aBufferLength is the size of the buffer. Be paranoid.
|
|
aBuffer[aBufferLength-1] = '\0';
|
|
|
|
if (aValue < 0) {
|
|
return false;
|
|
}
|
|
|
|
int length, point, i;
|
|
bool sign;
|
|
bool ok = true;
|
|
double_conversion::DoubleToStringConverter::DoubleToAscii(
|
|
aValue,
|
|
double_conversion::DoubleToStringConverter::SHORTEST,
|
|
8,
|
|
aBuffer,
|
|
aBufferLength,
|
|
&sign,
|
|
&length,
|
|
&point);
|
|
|
|
// length does not account for the 0 terminator.
|
|
if (length > point && (length+1) < (aBufferLength-1)) {
|
|
// We have to insert a decimal point. Not worried about adding a leading zero
|
|
// in the < 1 (point == 0) case.
|
|
aBuffer[length+1] = '\0';
|
|
for (i=length; i>point; i-=1) {
|
|
aBuffer[i] = aBuffer[i-1];
|
|
}
|
|
aBuffer[i] = '.'; // Not worried about locales
|
|
} else if (length < point) {
|
|
// Trailing zeros scenario
|
|
for (i=length; i<point; i+=1) {
|
|
if (i >= aBufferLength-2) {
|
|
ok = false;
|
|
}
|
|
aBuffer[i] = '0';
|
|
}
|
|
aBuffer[i] = '\0';
|
|
}
|
|
return ok;
|
|
}
|