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#include "StringTools/CharTools.h"
#include <algorithm>
namespace Leonetienne::StringTools {
bool CharTools::IsVowel(const char c, const std::string &vowels) {
const char lc = MakeLower(c);
return std::any_of(
vowels.cbegin(),
vowels.cend(),
[lc](const char vowel) {
return lc == vowel;
}
);
}
bool CharTools::IsLetter(const char c) {
// Re-implementing IsUpper and MakeLower to prevent stack-overflow by endless recursion
const char lowercase_c = !(c & (1<<5)) ? (c | (1<<5)) : c;
return (lowercase_c >= 'a') && (lowercase_c <= 'z');
}
bool CharTools::IsDigit(const char c) {
return (c >= '0') && (c <= '9');
}
bool CharTools::IsUpper(const char c) {
if (!IsLetter(c))
return false;
else
return !(c & (1<<5));
}
bool CharTools::IsLower(const char c) {
// Can't just return !IsUpper(c), because it should still return false for digits and symbols...
if (!IsLetter(c))
return false;
else
return (c & (1<<5));
}
char CharTools::MakeUpper(char c) {
if (!IsLetter(c))
return c;
else if (IsUpper(c))
return c;
else
return c & ~(1<<5);
}
char CharTools::MakeLower(char c) {
if (!IsLetter(c))
return c;
else if (!IsUpper(c))
return c;
else
return c | (1<<5);
}
char CharTools::CopySign(char sign, char c) {
if ((!IsLetter(c)) || (!IsLetter(sign)))
return c;
if (IsUpper(sign))
return MakeUpper(c);
else
return MakeLower(c);
}
}
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