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Class FString: improve floating point exception handling

This commit is contained in:
Markus Gans 2015-06-30 00:21:50 +02:00
parent 36d1163343
commit 21e9e0d397
3 changed files with 22 additions and 12 deletions
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20
src/fstring.cpp
View File

@ -965,7 +965,7 @@ long FString::toLong() const
if ( num > tenth_limit
|| (num == tenth_limit && d > tenth_limit_digit) )
{
throw std::out_of_range ("overflow");
throw std::overflow_error ("overflow");
}
num = (num<<3)+(num<<1) + d; // (10 * num) + d
p++;
@ -1009,7 +1009,7 @@ uLong FString::toULong() const
if ( num > tenth_limit
|| (num == tenth_limit && d > tenth_limit_digit) )
{
throw std::out_of_range ("overflow");
throw std::overflow_error ("overflow");
}
num = (num<<3)+(num<<1) + d; // (10 * num) + d
p++;
@ -1021,6 +1021,18 @@ uLong FString::toULong() const
return num;
}
//----------------------------------------------------------------------
float FString::toFloat() const
{
double d;
d = this->toDouble();
if ( d > FLT_MAX || d < FLT_MIN )
throw std::overflow_error ("overflow");
return float(d);
}
//----------------------------------------------------------------------
double FString::toDouble() const
{
@ -1041,9 +1053,9 @@ double FString::toDouble() const
if ( errno == ERANGE )
{
if ( ret >= HUGE_VAL || ret <= -HUGE_VAL )
throw std::out_of_range ("overflow");
throw std::overflow_error ("overflow");
if ( ret == 0.0l )
throw std::out_of_range ("underflow");
throw std::underflow_error ("underflow");
}
return ret;
}

5
src/fstring.h
View File

@ -10,6 +10,7 @@
#include <cassert>
#include <cerrno> // for read errno
#include <cfloat>
#include <climits>
#include <cmath>
#include <cstdarg> // need for va_list, va_start and va_end
@ -335,10 +336,6 @@ inline int FString::toInt() const
inline uInt FString::toUInt() const
{ return uInt( toULong() ); }
//----------------------------------------------------------------------
inline float FString::toFloat() const
{ return float( toDouble() ); }
//----------------------------------------------------------------------
inline std::vector<FString> FString::split (std::wstring& s)
{ return split(FString(s)); }

9
test/fstring.cpp
View File

@ -140,9 +140,9 @@ int main (int, char**)
{
std::cerr << "Invalid argument: " << ex.what() << std::endl;
}
catch (const std::out_of_range& ex)
catch (const std::exception& ex)
{
std::cerr << "Out of range: " << ex.what() << std::endl;
std::cerr << "Arithmetic error: " << ex.what() << std::endl;
}
setlocale(LC_NUMERIC, "C");
@ -156,10 +156,11 @@ int main (int, char**)
{
std::cerr << "Invalid argument: " << ex.what() << std::endl;
}
catch (const std::out_of_range& ex)
catch (const std::exception& ex)
{
std::cerr << "Out of range: " << ex.what() << std::endl;
std::cerr << "Arithmetic error: " << ex.what() << std::endl;
}
FString num1, num2, num3;
num1.setNumber(137);
num2.setNumber(-512);