parity.c File Reference

#include "parity.h"
#include <rz_util.h>

Go to the source code of this file.

Functions
bool	rz_parity_init (RzParity *ctx)
bool	rz_parity_update (RzParity *ctx, const ut8 *data, size_t len)
bool	rz_parity_final (ut8 *digest, RzParity *ctx)

Function Documentation

rz_parity_final()

bool rz_parity_final	(	ut8 *	digest,
		RzParity *	ctx
	)

Definition at line 25 of file parity.c.

                                                 {
    rz_return_val_if_fail(digest && ctx, false);
    *digest = (*ctx) & 1;
    return true;
}

References rz_return_val_if_fail.

Referenced by plugin_parity_final(), and plugin_parity_small_block().

rz_parity_init()

bool rz_parity_init

(

RzParity *

ctx

)

Definition at line 7 of file parity.c.

                                   {
    rz_return_val_if_fail(ctx, false);
    *ctx = 0;
    return true;
}

References rz_return_val_if_fail.

Referenced by plugin_parity_init(), and plugin_parity_small_block().

rz_parity_update()

bool rz_parity_update	(	RzParity *	ctx,
		const ut8 *	data,
		size_t	len
	)

Definition at line 13 of file parity.c.

                                                                  {
    rz_return_val_if_fail(ctx && data, false);
    ut32 ones = *ctx;
    for (size_t i = 0; i < len; ++i) {
        ut8 x = data[i];
        ones += ((x & 128) ? 1 : 0) + ((x & 64) ? 1 : 0) + ((x & 32) ? 1 : 0) + ((x & 16) ? 1 : 0) +
            ((x & 8) ? 1 : 0) + ((x & 4) ? 1 : 0) + ((x & 2) ? 1 : 0) + ((x & 1) ? 1 : 0);
    }
    *ctx = ones;
    return true;
}

References i, len, rz_return_val_if_fail, and x.

Referenced by plugin_parity_small_block(), and plugin_parity_update().