#include <ctype.h>

#include "kernel.h"

Object Make_Char (register int c) {
    Object ch;

    SET(ch, T_Character, (unsigned char)c);
    return ch;
}

Object P_Charp (Object c) {
    return TYPE(c) == T_Character ? True : False;
}

Object P_Char_To_Integer (Object c) {
    Check_Type (c, T_Character);
    return Make_Integer (CHAR(c));
}

Object P_Integer_To_Char (Object n) {
    register int i;

    if ((i = Get_Exact_Integer (n)) < 0 || i > 255)
	Range_Error (n);
    return Make_Char (i);
}

Object P_Char_Upper_Casep (Object c) {
    Check_Type (c, T_Character);
    return isupper (CHAR(c)) ? True : False;
}

Object P_Char_Lower_Casep (Object c) {
    Check_Type (c, T_Character);
    return islower (CHAR(c)) ? True : False;
}

Object P_Char_Alphabeticp (Object c) {
    Check_Type (c, T_Character);
    return isalpha (CHAR(c)) ? True : False;
}

Object P_Char_Numericp (Object c) {
    Check_Type (c, T_Character);
    return isdigit (CHAR(c)) ? True : False;
}

Object P_Char_Whitespacep (Object c) {
    register int x;

    Check_Type (c, T_Character);
    x = CHAR(c);
    return Whitespace (x) ? True : False;
}

Object P_Char_Upcase (Object c) {
    Check_Type (c, T_Character);
    return islower (CHAR(c)) ? Make_Char (toupper (CHAR(c))) : c;
}

Object P_Char_Downcase (Object c) {
    Check_Type (c, T_Character);
    return isupper (CHAR(c)) ? Make_Char (tolower (CHAR(c))) : c;
}

int General_Chrcmp (Object c1, Object c2, register int ci) {
    Check_Type (c1, T_Character);
    Check_Type (c2, T_Character);
    if (ci)
	return Char_Map[CHAR(c1)] - Char_Map[CHAR(c2)];
    return CHAR(c1) - CHAR(c2);
}

Object P_Char_Eq (Object c1, Object c2) {
    return General_Chrcmp (c1, c2, 0) ? False : True;
}

Object P_Char_Less (Object c1, Object c2) {
    return General_Chrcmp (c1, c2, 0) < 0 ? True : False;
}

Object P_Char_Greater (Object c1, Object c2) {
    return General_Chrcmp (c1, c2, 0) > 0 ? True : False;
}

Object P_Char_Eq_Less (Object c1, Object c2) {
    return General_Chrcmp (c1, c2, 0) <= 0 ? True : False;
}

Object P_Char_Eq_Greater (Object c1, Object c2) {
    return General_Chrcmp (c1, c2, 0) >= 0 ? True : False;
}

Object P_Char_CI_Eq (Object c1, Object c2) {
    return General_Chrcmp (c1, c2, 1) ? False : True;
}

Object P_Char_CI_Less (Object c1, Object c2) {
    return General_Chrcmp (c1, c2, 1) < 0 ? True : False;
}

Object P_Char_CI_Greater (Object c1, Object c2) {
    return General_Chrcmp (c1, c2, 1) > 0 ? True : False;
}

Object P_Char_CI_Eq_Less (Object c1, Object c2) {
    return General_Chrcmp (c1, c2, 1) <= 0 ? True : False;
}

Object P_Char_CI_Eq_Greater (Object c1, Object c2) {
    return General_Chrcmp (c1, c2, 1) >= 0 ? True : False;
}