ctype.cpp

#include <ctype.h>
#include <string.h>

extern "C" {

const char _ctype_[256] = {
    _C, _C, _C, _C, _C, _C, _C, _C,
    _C, _C|_S, _C|_S, _C|_S,    _C|_S,  _C|_S,  _C, _C,
    _C, _C, _C, _C, _C, _C, _C, _C,
    _C, _C, _C, _C, _C, _C, _C, _C,
    (char)(_S|_B),  _P, _P, _P, _P, _P, _P, _P,
    _P, _P, _P, _P, _P, _P, _P, _P,
    _N, _N, _N, _N, _N, _N, _N, _N,
    _N, _N, _P, _P, _P, _P, _P, _P,
    _P, _U|_X,  _U|_X,  _U|_X,  _U|_X,  _U|_X,  _U|_X,  _U,
    _U, _U, _U, _U, _U, _U, _U, _U,
    _U, _U, _U, _U, _U, _U, _U, _U,
    _U, _U, _U, _P, _P, _P, _P, _P,
    _P, _L|_X,  _L|_X,  _L|_X,  _L|_X,  _L|_X,  _L|_X,  _L,
    _L, _L, _L, _L, _L, _L, _L, _L,
    _L, _L, _L, _L, _L, _L, _L, _L,
    _L, _L, _L, _P, _P, _P, _P, _C
};

int tolower(int c)
{
    if (c >= 'A' && c <= 'Z')
        return c | 0x20;
    return c;
}

int toupper(int c)
{
    if (c >= 'a' && c <= 'z')
        return c & ~0x20;
    return c;
}

}