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/*
* Copyright (C) 2008-2009 Tobias Brunner
* Copyright (C) 2005-2006 Martin Willi
* Copyright (C) 2005 Jan Hutter
* Hochschule fuer Technik Rapperswil
*
* 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 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
#include "typedefs.h"
#include "chunk.h"
/**
* Empty chunk.
*/
chunk_t chunk_empty = { NULL, 0 };
/**
* Described in header.
*/
chunk_t chunk_create_clone(u_char *ptr, chunk_t chunk)
{
chunk_t clone = chunk_empty;
if (chunk.ptr && chunk.len > 0)
{
clone.ptr = ptr;
clone.len = chunk.len;
memcpy(clone.ptr, chunk.ptr, chunk.len);
}
return clone;
}
/**
* Described in header.
*/
int chunk_compare(chunk_t a, chunk_t b)
{
int compare_len = a.len - b.len;
int len = (compare_len < 0)? a.len : b.len;
if (compare_len != 0 || len == 0)
{
return compare_len;
}
return memcmp(a.ptr, b.ptr, len);
};
/**
* Remove non-printable characters from a chunk.
*/
bool chunk_printable(chunk_t chunk, chunk_t *sane, char replace)
{
bool printable = TRUE;
int i;
if (sane)
{
*sane = chunk_clone(chunk);
}
for (i = 0; i < chunk.len; i++)
{
if (!isprint(chunk.ptr[i]))
{
if (sane)
{
sane->ptr[i] = replace;
}
printable = FALSE;
}
}
return printable;
}
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