Code improvements

Introduced CharOps namespace.
Moved some functions from StringOps to CharOps.

logdoctor/utilities/chars.h

@@ -0,0 +1,71 @@
+#ifndef LOGDOCTOR__UTILITIES__CHARS_H
+#define LOGDOCTOR__UTILITIES__CHARS_H
+
+
+//! CharOps
+/*!
+    Utilities for chars
+*/
+namespace CharOps
+{
+
+//! Checks whether a character is numeric
+/*!
+    \param chr The target character
+    \return The result of the check
+*/
+inline bool isNumeric( const char& chr )
+{
+    return chr > 47 && chr < 58; // 0-9
+}
+
+//! Checks whether a character is alphabetic
+/*!
+    \param chr The target character
+    \return The result of the check
+*/
+inline bool isAlphabetic( const char& chr )
+{
+    return (chr > 96 && chr < 123)  // a-z
+        || (chr > 64 && chr <  91); // A-Z
+}
+
+//! Checks whether a character is alphanumeric
+/*!
+    \param chr The target character
+    \return The result of the check
+*/
+inline bool isAlnum( const char& chr )
+{
+    return isAlphabetic( chr )
+        || isNumeric( chr );
+}
+
+//! Checks whether a character is hexadecimal
+/*!
+    \param chr The target character
+    \return The result of the check
+*/
+inline bool isHex( const char& chr )
+{
+    return (chr > 47 && chr < 58)   // 0-9
+        || (chr > 64 && chr < 71)   // A-F
+        || (chr > 96 && chr < 103); // a-f
+}
+
+//! Checks whether a character can be part of an IPv4/IPv6
+/*!
+    \param chr The target character
+    \return The result of the check
+*/
+inline bool isIP( const char& chr )
+{
+    return chr == 46 // .
+        || chr == 58 // :
+        || isHex( chr );
+}
+
+} // namespace CharOps
+
+
+#endif // LOGDOCTOR__UTILITIES__CHARS_H