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Use std::stringstream for add_str_double

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Using std::stringstream allows conversion of double to string
independent of the current locale setting.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
This commit is contained in:
Stefan Weil 2019-04-14 13:01:07 +02:00
parent aa64a63f69
commit a1ffcd3654
1 changed files with 9 additions and 6 deletions
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15
src/ccutil/strngs.cpp
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@ -2,7 +2,6 @@
* File: strngs.cpp (Formerly strings.c)
* Description: STRING class functions.
* Author: Ray Smith
* Created: Fri Feb 15 09:13:30 GMT 1991
*
* (C) Copyright 1991, Hewlett-Packard Ltd.
** Licensed under the Apache License, Version 2.0 (the "License");
@ -20,6 +19,8 @@
#include "strngs.h"
#include <cassert> // for assert
#include <cstdlib> // for malloc, free
#include <locale> // for std::locale::classic
#include <sstream> // for std::stringstream
#include "errcode.h" // for ASSERT_HOST
#include "genericvector.h" // for GenericVector
#include "helpers.h" // for ReverseN
@ -389,11 +390,13 @@ void STRING::add_str_int(const char* str, int number) {
void STRING::add_str_double(const char* str, double number) {
if (str != nullptr)
*this += str;
// Allow space for the maximum possible length of %8g.
char num_buffer[kMaxDoubleSize];
snprintf(num_buffer, kMaxDoubleSize - 1, "%.8g", number);
num_buffer[kMaxDoubleSize - 1] = '\0';
*this += num_buffer;
std::stringstream stream;
// Use "C" locale (needed for double value).
stream.imbue(std::locale::classic());
// Use 8 digits for double value.
stream.precision(8);
stream << number;
*this += stream.str().c_str();
}
STRING & STRING::operator=(const char* cstr) {