mercurial/bitmanipulation.h
author Anton Shestakov <av6@dwimlabs.net>
Sun, 08 Jan 2017 01:24:45 +0800
changeset 30734 b9e49f7b0220
parent 29444 284d742e5611
child 32646 b4356d1cf3e4
permissions -rw-r--r--
hgweb: use archivespecs (dict) instead of archives (tuple) for "in" check
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
29444
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
     1
#ifndef _HG_BITMANIPULATION_H_
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
     2
#define _HG_BITMANIPULATION_H_
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
     3
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
     4
#include "compat.h"
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
     5
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
     6
static inline uint32_t getbe32(const char *c)
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
     7
{
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
     8
	const unsigned char *d = (const unsigned char *)c;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
     9
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    10
	return ((d[0] << 24) |
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    11
		(d[1] << 16) |
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    12
		(d[2] << 8) |
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    13
		(d[3]));
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    14
}
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    15
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    16
static inline int16_t getbeint16(const char *c)
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    17
{
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    18
	const unsigned char *d = (const unsigned char *)c;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    19
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    20
	return ((d[0] << 8) |
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    21
		(d[1]));
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    22
}
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    23
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    24
static inline uint16_t getbeuint16(const char *c)
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    25
{
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    26
	const unsigned char *d = (const unsigned char *)c;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    27
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    28
	return ((d[0] << 8) |
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    29
		(d[1]));
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    30
}
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    31
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    32
static inline void putbe32(uint32_t x, char *c)
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    33
{
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    34
	c[0] = (x >> 24) & 0xff;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    35
	c[1] = (x >> 16) & 0xff;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    36
	c[2] = (x >> 8) & 0xff;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    37
	c[3] = (x) & 0xff;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    38
}
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    39
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    40
static inline double getbefloat64(const char *c)
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    41
{
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    42
	const unsigned char *d = (const unsigned char *)c;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    43
	double ret;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    44
	int i;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    45
	uint64_t t = 0;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    46
	for (i = 0; i < 8; i++) {
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    47
		t = (t<<8) + d[i];
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    48
	}
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    49
	memcpy(&ret, &t, sizeof(t));
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    50
	return ret;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    51
}
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    52
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
    53
#endif