95 lines
3.7 KiB
C
95 lines
3.7 KiB
C
/***************************************************************************
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* Copyright (C) 2004, 2005 by Dominic Rath *
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* Dominic.Rath@gmx.de *
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* *
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* Copyright (C) 2007,2008 Øyvind Harboe *
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* oyvind.harboe@zylin.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#ifndef BINARYBUFFER_H
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#define BINARYBUFFER_H
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#include "types.h"
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/** @file
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* Support functions to access arbitrary bits in a byte array
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*/
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/* inlining this will help show what fn that is taking time during profiling. */
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static inline void buf_set_u32(uint8_t* buffer,
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unsigned int first, unsigned int num, uint32_t value)
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{
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if ((num == 32) && (first == 0)) {
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buffer[3] = (value >> 24) & 0xff;
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buffer[2] = (value >> 16) & 0xff;
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buffer[1] = (value >> 8) & 0xff;
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buffer[0] = (value >> 0) & 0xff;
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} else {
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for (unsigned i = first; i < first + num; i++)
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{
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if (((value >> (i - first)) & 1) == 1)
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buffer[i / 8] |= 1 << (i % 8);
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else
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buffer[i / 8] &= ~(1 << (i % 8));
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}
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}
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}
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static inline uint32_t buf_get_u32(const uint8_t* buffer,
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unsigned int first, unsigned int num)
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{
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if ((num == 32) && (first == 0)) {
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return (((uint32_t)buffer[3]) << 24) |
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(((uint32_t)buffer[2]) << 16) |
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(((uint32_t)buffer[1]) << 8) |
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(((uint32_t)buffer[0]) << 0);
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} else {
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uint32_t result = 0;
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for (unsigned i = first; i < first + num; i++)
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{
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if (((buffer[i / 8] >> (i % 8)) & 1) == 1)
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result |= 1 << (i - first);
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}
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return result;
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}
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}
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/// flip_u32 inverts the bit order inside a 32-bit word (31..0 -> 0..31)
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uint32_t flip_u32(uint32_t value, unsigned int num);
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int buf_cmp(const uint8_t *buf1, const uint8_t *buf2, int size);
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int buf_cmp_mask(const uint8_t *buf1, const uint8_t *buf2,
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const uint8_t *mask, int size);
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uint8_t* buf_cpy(const uint8_t *from, uint8_t *to, int size);
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uint8_t* buf_set_ones(uint8_t *buf, int count);
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uint8_t* buf_set_buf(const uint8_t *src, int src_start,
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uint8_t *dst, int dst_start, int len);
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int str_to_buf(const char *str, int len,
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uint8_t *bin_buf, int buf_size, int radix);
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char* buf_to_str(const uint8_t *buf, int size, int radix);
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#define CEIL(m, n) (((m) + (n) - 1) / (n))
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/* read a uint32_t from a buffer in target memory endianness */
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static inline uint32_t fast_target_buffer_get_u32(const uint8_t *p, int le)
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{
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return le ? le_to_h_u32(p) : be_to_h_u32(p);
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}
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#endif /* BINARYBUFFER_H */
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