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Add lexical casts for float

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This commit is contained in:
Jon Daniel 2012-05-02 18:29:49 +00:00
parent 15c46090d5
commit 0621eb4f0e
2 changed files with 62 additions and 0 deletions
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50
src/util.cpp
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@ -249,3 +249,53 @@ double lexical_cast_default<double, const char*>(const char* a, double def)
}
}
template<>
float lexical_cast<float, const std::string&>(const std::string& a)
{
char* endptr;
float res = strtof(a.c_str(), &endptr);
if (a.empty() || *endptr != '\0') {
throw bad_lexical_cast();
} else {
return res;
}
}
template<>
float lexical_cast<float, const char*>(const char* a)
{
char* endptr;
float res = strtof(a, &endptr);
if (*a == '\0' || *endptr != '\0') {
throw bad_lexical_cast();
} else {
return res;
}
}
template<>
float lexical_cast_default<float, const std::string&>(const std::string& a, float def)
{
char* endptr;
float res = strtof(a.c_str(), &endptr);
if (a.empty() || *endptr != '\0') {
return def;;
} else {
return res;
}
}
template<>
float lexical_cast_default<float, const char*>(const char* a, float def)
{
char* endptr;
float res = strtof(a, &endptr);
if (*a == '\0' || *endptr != '\0') {
return def;
} else {
return res;
}
}

12
src/util.hpp
View file

@ -141,6 +141,18 @@ double lexical_cast_default<double, const std::string&>(const std::string& a, do
template<>
double lexical_cast_default<double, const char*>(const char* a, double def);
template<>
float lexical_cast<float, const std::string&>(const std::string& a);
template<>
float lexical_cast<float, const char*>(const char* a);
template<>
float lexical_cast_default<float, const std::string&>(const std::string& a, float def);
template<>
float lexical_cast_default<float, const char*>(const char* a, float def);
template<typename From>
std::string str_cast(From a)
{