libosmocore 0.9.6-23.20170220git32ee5af8.fc42
Osmocom core library
Loading...
Searching...
No Matches
bits.h
Go to the documentation of this file.
1#pragma once
2
3#include <stdint.h>
4#include <stddef.h>
5
6#include <osmocom/core/bit16gen.h>
7#include <osmocom/core/bit32gen.h>
8#include <osmocom/core/bit64gen.h>
9
22typedef int8_t sbit_t;
23typedef uint8_t ubit_t;
24typedef uint8_t pbit_t;
30static inline unsigned int osmo_pbit_bytesize(unsigned int num_bits)
31{
32 unsigned int pbit_bytesize = num_bits / 8;
33
34 if (num_bits % 8)
35 pbit_bytesize++;
36
37 return pbit_bytesize;
38}
39
40int osmo_ubit2pbit(pbit_t *out, const ubit_t *in, unsigned int num_bits);
41
42int osmo_pbit2ubit(ubit_t *out, const pbit_t *in, unsigned int num_bits);
43
44void osmo_nibble_shift_right(uint8_t *out, const uint8_t *in,
45 unsigned int num_nibbles);
46void osmo_nibble_shift_left_unal(uint8_t *out, const uint8_t *in,
47 unsigned int num_nibbles);
48
49void osmo_ubit2sbit(sbit_t *out, const ubit_t *in, unsigned int num_bits);
50void osmo_sbit2ubit(ubit_t *out, const sbit_t *in, unsigned int num_bits);
51
52int osmo_ubit2pbit_ext(pbit_t *out, unsigned int out_ofs,
53 const ubit_t *in, unsigned int in_ofs,
54 unsigned int num_bits, int lsb_mode);
55
56int osmo_pbit2ubit_ext(ubit_t *out, unsigned int out_ofs,
57 const pbit_t *in, unsigned int in_ofs,
58 unsigned int num_bits, int lsb_mode);
59
60#define OSMO_BIN_SPEC "%d%d%d%d%d%d%d%d"
61#define OSMO_BIN_PRINT(byte) \
62 (byte & 0x80 ? 1 : 0), \
63 (byte & 0x40 ? 1 : 0), \
64 (byte & 0x20 ? 1 : 0), \
65 (byte & 0x10 ? 1 : 0), \
66 (byte & 0x08 ? 1 : 0), \
67 (byte & 0x04 ? 1 : 0), \
68 (byte & 0x02 ? 1 : 0), \
69 (byte & 0x01 ? 1 : 0)
70
71#define OSMO_BIT_SPEC "%c%c%c%c%c%c%c%c"
72#define OSMO_BIT_PRINT(byte) \
73 (byte & 0x80 ? '1' : '.'), \
74 (byte & 0x40 ? '1' : '.'), \
75 (byte & 0x20 ? '1' : '.'), \
76 (byte & 0x10 ? '1' : '.'), \
77 (byte & 0x08 ? '1' : '.'), \
78 (byte & 0x04 ? '1' : '.'), \
79 (byte & 0x02 ? '1' : '.'), \
80 (byte & 0x01 ? '1' : '.')
81
82/* BIT REVERSAL */
83
95
97uint32_t osmo_bit_reversal(uint32_t x, enum osmo_br_mode k);
98
99/* \brief reverse the bits within each byte of a 32bit word */
100uint32_t osmo_revbytebits_32(uint32_t x);
101
102/* \brief reverse the bits within a byte */
103uint32_t osmo_revbytebits_8(uint8_t x);
104
105/* \brief reverse the bits of each byte in a given buffer */
106void osmo_revbytebits_buf(uint8_t *buf, int len);
107
113static inline uint16_t osmo_rol16(uint16_t in, unsigned shift)
114{
115 return (in << shift) | (in >> (16 - shift));
116}
117
int osmo_ubit2pbit(pbit_t *out, const ubit_t *in, unsigned int num_bits)
convert unpacked bits to packed bits, return length in bytes
Definition bits.c:41
uint8_t pbit_t
packed bis (8 bits in a byte)
Definition bits.h:24
static unsigned int osmo_pbit_bytesize(unsigned int num_bits)
determine how many bytes we would need for num_bits packed bits
Definition bits.h:30
osmo_br_mode
bit-reversal mode for osmo_bit_reversal()
Definition bits.h:85
void osmo_sbit2ubit(ubit_t *out, const sbit_t *in, unsigned int num_bits)
convert soft bits to unpacked bits
Definition bits.c:129
int osmo_ubit2pbit_ext(pbit_t *out, unsigned int out_ofs, const ubit_t *in, unsigned int in_ofs, unsigned int num_bits, int lsb_mode)
convert unpacked bits to packed bits (extended options)
Definition bits.c:187
int osmo_pbit2ubit(ubit_t *out, const pbit_t *in, unsigned int num_bits)
convert packed bits to unpacked bits, return length in bytes
Definition bits.c:142
uint8_t ubit_t
unpacked bit (0 or 1)
Definition bits.h:23
void osmo_nibble_shift_left_unal(uint8_t *out, const uint8_t *in, unsigned int num_nibbles)
Shift unaligned input to octet-aligned output.
Definition bits.c:96
int osmo_pbit2ubit_ext(ubit_t *out, unsigned int out_ofs, const pbit_t *in, unsigned int in_ofs, unsigned int num_bits, int lsb_mode)
convert packed bits to unpacked bits (extended options)
Definition bits.c:212
uint32_t osmo_revbytebits_32(uint32_t x)
reverse the bit-order in each byte of a dword
Definition bits.c:252
void osmo_ubit2sbit(sbit_t *out, const ubit_t *in, unsigned int num_bits)
convert unpacked bits to soft bits
Definition bits.c:117
void osmo_revbytebits_buf(uint8_t *buf, int len)
reverse bit-order of each byte in a buffer
Definition bits.c:282
int8_t sbit_t
soft bit (-127...127)
Definition bits.h:22
static uint16_t osmo_rol16(uint16_t in, unsigned shift)
left circular shift
Definition bits.h:113
void osmo_nibble_shift_right(uint8_t *out, const uint8_t *in, unsigned int num_nibbles)
Shift unaligned input to octet-aligned output.
Definition bits.c:69
uint32_t osmo_bit_reversal(uint32_t x, enum osmo_br_mode k)
generic bit reversal function
Definition bits.c:235
uint32_t osmo_revbytebits_8(uint8_t x)
reverse the bit order in a byte
Definition bits.c:267
@ OSMO_BR_BITS_IN_DWORD
reverse all bits in a 32bit dword
Definition bits.h:87
@ OSMO_BR_BYTES_IN_DWORD
reverse byte order in a 32bit dword
Definition bits.h:89
@ OSMO_BR_BITS_IN_BYTE
reverse bits of each byte in a 32bit dword
Definition bits.h:91
@ OSMO_BR_WORD_SWAP
swap the two 16bit words in a 32bit dword
Definition bits.h:93