debug.c

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#include <xinu.h>
#include <stdio.h>
#include <debug.h>

// ByteをASCIIか16進数でSTDOUT（標準出力）に出力するhexdump_print()の宣言
static void hexdump_print(byte, byte);

static void hexdump_print(
    byte data, /* Item to print     */
    byte mode  /* ASCII or hex mode     */
)
{
    switch (mode)
    {
    case DEBUG_ASCII:
        data = (' ' <= data && data <= '~') ? data : '.';
        fprintf(stdout, "%c", data);
        break;
    case DEBUG_HEX:
        fprintf(stdout, "%02x ", data);
        break;
    default:
        break;
    }
}

void hexdump(void *buffer, uint32 length, bool8 canon)
{
    uint32 m, n, remain;

    byte *b = (byte *)buffer;

    for (n = 0; n < length; n += 0x10)
    {
        fprintf(stdout, "%08x ", (uint32)buffer + n);

        remain = length - n;

        for (m = 0; m < remain && m < 0x10; m++)
        {
            if (m % 0x08 == 0)
            {
                fprintf(stdout, " ");
            }
            hexdump_print(b[n + m], DEBUG_HEX);
        }

        /* Pad the rest if needed */
        if (remain < 0x10)
        {
            for (m = 0; m < 0x10 - remain; m++)
            {
                if ((0 != m) && (0 == m % 0x08))
                {
                    fprintf(stdout, " ");
                }
                fprintf(stdout, "   ");
            }
        }

        if (canon == TRUE)
        {
            fprintf(stdout, " |");
            for (m = 0; m < remain && m < 0x10; m++)
            {
                hexdump_print(b[n + m], DEBUG_ASCII);
            }
            fprintf(stdout, "|");
        }
        fprintf(stdout, "\n");
    }
}