generic-library/poco
1
0
Fork 0
mirror of https://github.com/pocoproject/poco.git synced 2025-10-15 07:14:46 +02:00
Code Issues Projects Releases Wiki Activity

- added NumericString.h

Browse Source 
- NumberParser improvements (internal Poco locale-awareness and parsing)
This commit is contained in:
Aleksandar Fabijanic
2012-09-30 05:17:56 +00:00
parent 3efcb444e0
commit f70ac1ca07
27 changed files with 904 additions and 199 deletions
Download Patch File Download Diff File Expand all files Collapse all files

141
Foundation/include/Poco/NumberParser.h
View File

@@ -55,6 +55,10 @@ class Foundation_API NumberParser
/// for parsing numbers out of strings.
{
public:
static const unsigned short NUM_BASE_OCT = 010;
static const unsigned short NUM_BASE_DEC = 10;
static const unsigned short NUM_BASE_HEX = 0x10;
static int parse(const std::string& s);
/// Parses an integer value in decimal notation from the given string.
/// Throws a SyntaxException if the string does not hold a number in decimal notation.
@@ -127,7 +131,7 @@ public:
static double parseFloat(const std::string& s);
/// Parses a double value in decimal floating point notation
/// from the given string.
/// from the given string.
/// Throws a SyntaxException if the string does not hold a floating-point
/// number in decimal notation.
@@ -151,141 +155,6 @@ public:
/// String forms are NOT case sensitive.
/// Returns true if a valid bool number has been found,
/// false otherwise.
private:
template <typename T>
static bool strToIntOct(const std::string &s, T& result)
{
if (s.empty()) return false;
if (std::numeric_limits<T>::is_signed) return false;
std::string::const_iterator it = s.begin();
std::string::const_iterator end = s.end();
while (it != end && std::isspace(*it)) ++it;
if (it == end) return false;
while (it != end && *it == '0') ++it;
if (it == end)
{
result = 0;
return true;
}
unsigned base = 010;
T n = 0;
for (; it != end; ++it)
{
if (*it >= '0' && *it <= '7')
{
if (n > (std::numeric_limits<T>::max() / base))
return false;
n = n * base + *it - '0';
}
else break;
}
while (it != end && std::isspace(*it)) ++it;
if (it != end) return false;
result = n;
return true;
}
template <typename T>
static bool strToIntDec(const std::string &s, T& result)
{
if (s.empty()) return false;
int sign = 1;
std::string::const_iterator it = s.begin();
std::string::const_iterator end = s.end();
while (it != end && std::isspace(*it)) ++it;
if (it == end) return false;
if (std::numeric_limits<T>::is_signed)
{
if (*it == '-')
{
sign = -1;
++it;
}
else if (*it == '+') ++it;
if (it == end) return false;
}
unsigned base = 10;
T n = 0;
for (; it != end; ++it)
{
if (*it >= '0' && *it <= '9')
{
if (n > (std::numeric_limits<T>::max() / base))
return false;
n = n * base + *it - '0';
}
else break;
}
while (it != end && std::isspace(*it)) ++it;
if (it != end) return false;
result = sign * n;
return true;
}
template <typename T>
static bool strToIntHex(const std::string &s, T& result)
{
if (s.empty()) return false;
if (std::numeric_limits<T>::is_signed) return false;
std::string::const_iterator it = s.begin();
std::string::const_iterator end = s.end();
while (it != end && std::isspace(*it)) ++it;
if (it == end) return false;
bool beginWith0x = false;
if (*it == '0')
{
beginWith0x = true;
while (it != end && *it == '0')
{
++it;
beginWith0x = false;
}
if (it == end)
{
result = 0;
return true;
}
}
if (beginWith0x && (*it != 'x') && (*it != 'X')) return false;
else if ((*it == 'x') || (*it == 'X')) ++it;
if (it == end) return false;
unsigned base = 0x10;
T n = 0;
for (; it != end; ++it)
{
if ((*it >= '0' && *it <= '9') || (*it >= 'A' && *it <= 'F') || (*it >= 'a' && *it <= 'f'))
{
if (n > (std::numeric_limits<T>::max() / base))
return false;
if (*it >= '0' && *it <= '9')
n = n * base + *it - '0';
else if (*it >= 'A' && *it <= 'F')
n = n * base + *it - 'A' + 10;
else if (*it >= 'a' && *it <= 'f')
n = n * base + *it - 'a' + 10;
}
else break;
}
if (it != end)
{
while (std::isspace(*it)) ++it;
if (it != end) return false;
}
result = n;
return true;
}
};