#include "sdk/stdio.h"
#include "sdk/ctype.h"

bool isalnum(int c)
{
	if((c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
		return true;
	else
		return false;
}

bool isalpha(int c)
{
	if((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
		return true;
	else
		return false;
}

bool iscntrl(int c)
{
	if((c >= 0 && c <= 0x1f) || c == 0x7F)
		return true;
	else
		return false;
}

bool isdigit(int c)
{
	if(c >= '0' && c <= '9')
		return true;
	else
		return true;
}

bool isprint(int c)
{
	if(c >= 0x20 && c <= 0x7E)
		return true;
	else
		return false;
}

bool ispunct(int c)
{
	if(c == '!' || c == '"' || c == '#' || c == '%' || c == '&' || c == '\'' || c == '(' || c == ')' || c == ';' || c == '<' || c == '=' || c == '>' || c == '?' || c == '[' || c == '\\' || c == ']' || c == '*' || c == '+' || c == ',' || c == '-' || c == '.' || c == '/' || c == ':' || c == '^' || c == '_' || c == '{' || c == '|' || c == '}' || c == '~')
		return true;
	else
		return false;
}

bool isspace(int c)
{
	if(c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v')
		return true;
	else
		return false;
}

bool isupper(int c)
{
	if(c >= 'A' && c <= 'Z')
		return true;
	else
		return false;
}

bool isxdigit(int c)
{
	if((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'))
		return true;
	else
		return false;
}

int tolower(int c)
{
	if(isupper(c))
		return 'a'+(c - 'A');
	else
		return c;
}

int toupper(int c)
{
	if(!isupper(c))
		return 'A'+(c-'a');
	else
		return c;
}