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/***************************************************************************
* Copyright (C) 2004, 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007,2008 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* 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. *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifndef BINARYBUFFER_H
#define BINARYBUFFER_H
#include "types.h"
/* support functions to access arbitrary bits in a byte array
* flip_u32 inverses the bit order inside a 32-bit word (31..0 -> 0..31)
*/
/* inlining this will help show what fn that is taking time during profiling. */
static inline void buf_set_u32(uint8_t* buffer, unsigned int first, unsigned int num, uint32_t value)
{
if ((num==32) && (first==0))
{
buffer[3]=(value>>24)&0xff;
buffer[2]=(value>>16)&0xff;
buffer[1]=(value>>8)&0xff;
buffer[0]=(value>>0)&0xff;
} else
{
unsigned int i;
for (i=first; i<first+num; i++)
{
if (((value >> (i-first))&1) == 1)
buffer[i/8] |= 1 << (i%8);
else
buffer[i/8] &= ~(1 << (i%8));
}
}
}
static inline uint32_t buf_get_u32(const uint8_t* buffer, unsigned int first, unsigned int num)
{
if ((num==32) && (first==0))
{
return (((uint32_t)buffer[3])<<24)|(((uint32_t)buffer[2])<<16)|(((uint32_t)buffer[1])<<8)|(((uint32_t)buffer[0])<<0);
} else
{
uint32_t result = 0;
unsigned int i;
for (i=first; i<first+num; i++)
{
if (((buffer[i/8]>>(i%8))&1) == 1)
result |= 1 << (i-first);
}
return result;
}
}
extern uint32_t flip_u32(uint32_t value, unsigned int num);
extern int buf_cmp(const uint8_t *buf1, const uint8_t *buf2, int size);
extern int buf_cmp_mask(const uint8_t *buf1, const uint8_t *buf2, const uint8_t *mask, int size);
extern uint8_t* buf_cpy(const uint8_t *from, uint8_t *to, int size);
extern uint8_t* buf_set_ones(uint8_t *buf, int count);
extern uint8_t* buf_set_buf(const uint8_t *src, int src_start, uint8_t *dst, int dst_start, int len);
extern int str_to_buf(const char *str, int len, uint8_t *bin_buf, int buf_size, int radix);
extern char* buf_to_str(const uint8_t *buf, int size, int radix);
struct scan_field_s;
extern int buf_to_u32_handler(uint8_t *in_buf, void *priv, struct scan_field_s *field);
#define CEIL(m, n) ((m + n - 1) / n)
/* read a uint32_t from a buffer in target memory endianness */
static inline uint32_t fast_target_buffer_get_u32(const uint8_t *buffer, int little)
{
if (little)
return le_to_h_u32(buffer);
else
return be_to_h_u32(buffer);
}
#endif /* BINARYBUFFER_H */
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