[minimal.git] / hexdump.h

/* Minimal - the simplest thing that could possibly work
 * Copyright (C) 2007  Jay Freeman (saurik)
*/

/*
 *        Redistribution and use in source and binary
 * forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the
 *    above copyright notice, this list of conditions
 *    and the following disclaimer.
 * 2. 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.
 * 3. 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 MINIMAL_HEXDUMP_H
#define MINIMAL_HEXDUMP_H

#include "minimal/stdlib.h"

_disused static char hexchar(uint8_t value) {
    return value < 0x20 || value >= 0x80 ? '.' : value;
}

#define HexWidth_ 12

_disused static void hexdump(const char *mark, const uint8_t *data, size_t size) {
    size_t i = 0, j;

    while (i != size) {
        if (i % HexWidth_ == 0)
            printf("[%s] 0x%.3zx:", mark, i);

        printf(" %.2x", data[i]);

        if (++i % HexWidth_ == 0) {
            printf("  ");
            for (j = i - HexWidth_; j != i; ++j)
                printf("%c", hexchar(data[j]));
            printf("\n");
        }
    }

    if (i % HexWidth_ != 0) {
        for (j = i % HexWidth_; j != HexWidth_; ++j)
            printf("   ");
        printf("  ");
        for (j = i / HexWidth_ * HexWidth_; j != i; ++j)
            printf("%c", hexchar(data[j]));
        printf("\n");
    }
}

#endif/*MINIMAL_HEXDUMP_H*/