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