ctype.d

/**
 * D header file for C99.
 *
 * $(C_HEADER_DESCRIPTION pubs.opengroup.org/onlinepubs/009695399/basedefs/_ctype.h.html, _ctype.h)
 *
 * Copyright: Copyright Sean Kelly 2005 - 2009.
 * License: Distributed under the
 *      $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0).
 *    (See accompanying file LICENSE)
 * Authors:   Sean Kelly
 * Source:    $(DRUNTIMESRC core/stdc/_ctype.d)
 * Standards: ISO/IEC 9899:1999 (E)
 */
extern (C):
@trusted: // All of these operate on integers only.
nothrow:
@nogc:

    ///
pure int isalnum(int c);
///
pure int isalpha(int c);
///
pure int isblank(int c);
///
pure int iscntrl(int c)
{
	return cast(uint)c < 0x20 || c == 0x7f;
}
///
pure int isdigit(int c);
///
pure int isgraph(int c);
///
pure int islower(int c);
///
pure int isprint(int c);
///
pure int ispunct(int c);
///
pure int isspace(int c);
///
pure int isupper(int c)
{
    return cast(uint)c-'A' < 26;
}
///
pure int isxdigit(int c);
///
pure int toupper(int c);

///
int tolower(int c)
{
	if (isupper(c)) return c | 32;
	return c;
}

int __maskrune(int c, uint _f)
{
	//stub
	return 0;
}

int isascii(int c)
{
    return !(c&~0x7f);
}