hackedteam/core-android-market

/* The MIT License

   Copyright (C) 2011, 2012 Zilong Tan (eric.zltan@gmail.com)

   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
   "Software"), to deal in the Software without restriction, including
   without limitation the rights to use, copy, modify, merge, publish,
   distribute, sublicense, and/or sell copies of the Software, and to
   permit persons to whom the Software is furnished to do so, subject to
   the following conditions:

   The above copyright notice and this permission notice shall be
   included in all copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   SOFTWARE.
*/

#include <ctype.h>
#include <stdio.h>
#include "util_hexdump.h"
#include "util_algo.h"

#define hex_asc_lo(x)    hex_asc[((x) & 0x0f)]
#define hex_asc_hi(x)    hex_asc[((x) & 0xf0) >> 4]

const char hex_asc[] = "0123456789abcdef";

int hex_to_bin(char ch)
{
    if ((ch >= '0') && (ch <= '9'))
        return ch - '0';
    ch = tolower(ch);
    if ((ch >= 'a') && (ch <= 'f'))
        return ch - 'a' + 10;
    return -1;
}

void hex2bin(uint8_t *dst, const char *src, size_t count)
{
    while (count--) {
        *dst = hex_to_bin(*src++) << 4;
        *dst += hex_to_bin(*src++);
        dst++;
    }
}

void hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
            int groupsize, char *linebuf, size_t linebuflen,
            int ascii)
{
    const uint8_t *ptr = buf;
    uint8_t ch;
    int j, lx = 0;
    int ascii_column;

    if (rowsize != 16 && rowsize != 32)
        rowsize = 16;

    if (!len)
        goto nil;
    if (len > (size_t) rowsize)    /* limit to one line at a time */
        len = rowsize;
    if ((len % groupsize) != 0)    /* no mixed size output */
        groupsize = 1;

    switch (groupsize) {
    case 8: {
        const uint64_t *ptr8 = buf;
        int ngroups = len / groupsize;

        for (j = 0; j < ngroups; j++)
            lx += snprintf(linebuf + lx, linebuflen - lx,
                       "%s%16.16llx", j ? " " : "",
                       (unsigned long long)*(ptr8 + j));
        ascii_column = 17 * ngroups + 2;
        break;
    }

    case 4: {
        const uint32_t *ptr4 = buf;
        int ngroups = len / groupsize;

        for (j = 0; j < ngroups; j++)
            lx += snprintf(linebuf + lx, linebuflen - lx,
                       "%s%8.8x", j ? " " : "", *(ptr4 + j));
        ascii_column = 9 * ngroups + 2;
        break;
    }

    case 2: {
        const uint16_t *ptr2 = buf;
        int ngroups = len / groupsize;

        for (j = 0; j < ngroups; j++)
            lx += snprintf(linebuf + lx, linebuflen - lx,
                       "%s%4.4x", j ? " " : "", *(ptr2 + j));
        ascii_column = 5 * ngroups + 2;
        break;
    }

    default:
        for (j = 0; ((size_t)j < len) && (size_t)(lx + 3) <= linebuflen; j++) {
            ch = ptr[j];
            linebuf[lx++] = hex_asc_hi(ch);
            linebuf[lx++] = hex_asc_lo(ch);
            linebuf[lx++] = ' ';
        }
        if (j)
            lx--;

        ascii_column = 3 * rowsize + 2;
        break;
    }
    if (!ascii)
        goto nil;

    while ((size_t)lx < (linebuflen - 1) && lx < (ascii_column - 1))
        linebuf[lx++] = ' ';
    for (j = 0; ((size_t)j < len) && (size_t)(lx + 2) < linebuflen; j++) {
        ch = ptr[j];
        linebuf[lx++] = (isascii(ch) && isprint(ch)) ? ch : '.';
    }
nil:
    linebuf[lx++] = '\0';
}

void print_hex_dump(const char *prefix_str, int prefix_type,
            int rowsize, int groupsize,
            const void *buf, size_t len, int ascii)
{
    const uint8_t *ptr = buf;
    int i, linelen, remaining = len;
    unsigned char linebuf[32 * 3 + 2 + 32 + 1];

    if (rowsize != 16 && rowsize != 32)
        rowsize = 16;

    for (i = 0; (size_t)i < len; i += rowsize) {
        linelen = _min(remaining, rowsize);
        remaining -= rowsize;

        hex_dump_to_buffer(ptr + i, linelen, rowsize, groupsize,
                   (char *) linebuf, sizeof(linebuf), ascii);

        switch (prefix_type) {
        case DUMP_PREFIX_ADDRESS:
            printf("%s%p: %s\n", prefix_str, ptr + i, linebuf);
            break;
        case DUMP_PREFIX_OFFSET:
            printf("%s%.8x: %s\n", prefix_str, i, linebuf);
            break;
        default:
            printf("%s%s\n", prefix_str, linebuf);
            break;
        }
    }
}

void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
              const void *buf, size_t len)
{
    print_hex_dump(prefix_str, prefix_type, 16, 1, buf, len, 1);
}