case_ascii.h

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#ifndef GUL17_CASE_ASCII_H_
#define GUL17_CASE_ASCII_H_
 
#include <string_view>
#include <string>
 
#include "gul17/internal.h"
 
namespace gul17 {
 
constexpr char lowercase_ascii(char c) noexcept
{
    if (c >= 'A' && c <= 'Z')
        c = static_cast<char>(c + ('a' - 'A'));
    return c;
}
 
GUL_EXPORT
std::string lowercase_ascii(std::string_view str);
 
GUL_EXPORT
std::string& lowercase_ascii_inplace(std::string& str) noexcept;
 
constexpr char uppercase_ascii(char c) noexcept
{
    if (c >= 'a' && c <= 'z')
        c = static_cast<char>(c - ('a' - 'A'));
    return c;
}
 
GUL_EXPORT
std::string uppercase_ascii(std::string_view str);
 
GUL_EXPORT
std::string& uppercase_ascii_inplace(std::string& str) noexcept;
 
 
} // namespace gul17
 
#endif
 
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