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/* hexify.c: change a binary string to ASCII hex characters.
Copyright (C) 1992 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "config.h"
#include "hexify.h"
/* Convert the number N (assumed to be small enough) to a lowercase hex
character. */
#define HEX_DIGIT(n) ((n) < 10 ? (n) + '0' : (n) - 10 + 'a')
string
hexify (one_byte *data, unsigned length)
{
unsigned i;
/* Each byte in S turns into two hex chars, plus the terminating null. */
string h = xmalloc (length * 2 + 1);
for (i = 0; i < length; i++)
{
unsigned char n = (data[i] & 0xf0) >> 4;
h[i * 2] = HEX_DIGIT (n);
n = data[i] & 0x0f;
h[i * 2 + 1] = HEX_DIGIT (n);
}
h[i * 2] = 0;
return h;
}
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