source: mainline/uspace/app/bithenge/helenos/os.h@ 04a7435f

/*
 * Copyright (c) 2012 Sean Bartell
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef BITHENGE_OS_H_
#define BITHENGE_OS_H_

#include <bool.h>
#include <byteorder.h>
#include <errno.h>
#include <macros.h>
#include <mem.h>
#include <str.h>
#include <str_error.h>

typedef struct {
        const char *string;
        size_t offset;
        wchar_t ch;
} string_iterator_t;

static inline string_iterator_t string_iterator(const char *string)
{
        string_iterator_t i;
        i.string = string;
        i.offset = 0;
        i.ch = str_decode(i.string, &i.offset, STR_NO_LIMIT);
        return i;
}

static inline bool string_iterator_done(const string_iterator_t *i)
{
        return i->ch == L'\0';
}

static inline int string_iterator_next(string_iterator_t *i, wchar_t *out)
{
        *out = i->ch;
        if (*out == U_SPECIAL)
                return EINVAL;
        i->ch = str_decode(i->string, &i->offset, STR_NO_LIMIT);
        return EOK;
}

#endif