utils.h

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/*
 * This file is part of LibCSS.
 * Licensed under the MIT License,
 *                http://www.opensource.org/licenses/mit-license.php
 * Copyright 2007-8 John-Mark Bell <jmb@netsurf-browser.org>
 */
 
#ifndef css_utils_h_
#define css_utils_h_
 
#include <libwapcaplet/libwapcaplet.h>
 
#include <libcss/types.h>
#include <libcss/errors.h>
 
#ifndef max
#define max(a,b) ((a)>(b)?(a):(b))
#endif
 
#ifndef min
#define min(a,b) ((a)<(b)?(a):(b))
#endif
 
#ifndef SLEN
/* Calculate length of a string constant */
#define SLEN(s) (sizeof((s)) - 1) /* -1 for '\0' */
#endif
 
#ifndef UNUSED
#define UNUSED(x) ((void)(x))
#endif
 
#ifndef N_ELEMENTS
#define N_ELEMENTS(x) (sizeof((x)) / sizeof((x)[0]))
#endif
 
css_fixed css__number_from_lwc_string(lwc_string *string, bool int_only,
                size_t *consumed);
css_fixed css__number_from_string(const uint8_t *data, size_t len,
                bool int_only, size_t *consumed);
 
static inline bool isDigit(uint8_t c)
{
        return '0' <= c && c <= '9';
}
 
static inline bool isHex(uint8_t c)
{
        return isDigit(c) || ('a' <= c && c <= 'f') || ('A' <= c && c <= 'F');
}
 
static inline uint32_t charToHex(uint8_t c)
{
        c -= '0';
 
        if (c > 9)
                c -= 'A' - '9' - 1;
 
        if (c > 15)
                c -= 'a' - 'A';
 
        return c;
}
 
static inline css_error css_error_from_lwc_error(lwc_error err)
{
        switch (err) {
        case lwc_error_ok:
                return CSS_OK;
        case lwc_error_oom:
                return CSS_NOMEM;
        case lwc_error_range:
                return CSS_BADPARM;
        default:
                break;
        }
        return CSS_INVALID;
}
 
#endif