annotate mercurial/bitmanipulation.h @ 43524:949b4d545c90

color: suppress pytype warning on a windows-only module Differential Revision: https://phab.mercurial-scm.org/D7274
author Augie Fackler <augie@google.com>
date Wed, 06 Nov 2019 14:48:22 -0500
parents 1fb2510cf8c8
children eed42f1c22d6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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
32669
b4356d1cf3e4 bitmanipulation: add missing include of string.h
Martin von Zweigbergk <martinvonz@google.com>
parents: 29444
diff changeset
4 #include <string.h>
b4356d1cf3e4 bitmanipulation: add missing include of string.h
Martin von Zweigbergk <martinvonz@google.com>
parents: 29444
diff changeset
5
29444
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
6 #include "compat.h"
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 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
9 {
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
10 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
11
38312
1fb2510cf8c8 bitmanipulation: fix undefined behavior in bit shift in getbe32
Augie Fackler <augie@google.com>
parents: 34697
diff changeset
12 return ((((uint32_t)d[0]) << 24) | (((uint32_t)d[1]) << 16) |
1fb2510cf8c8 bitmanipulation: fix undefined behavior in bit shift in getbe32
Augie Fackler <augie@google.com>
parents: 34697
diff changeset
13 (((uint32_t)d[2]) << 8) | (d[3]));
29444
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
34697
ce77b0563228 bitmanipulation: reformat with clang-format
Augie Fackler <augie@google.com>
parents: 32669
diff changeset
20 return ((d[0] << 8) | (d[1]));
29444
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
21 }
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 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
24 {
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
25 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
26
34697
ce77b0563228 bitmanipulation: reformat with clang-format
Augie Fackler <augie@google.com>
parents: 32669
diff changeset
27 return ((d[0] << 8) | (d[1]));
29444
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
28 }
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
29
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
30 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
31 {
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
32 c[0] = (x >> 24) & 0xff;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
33 c[1] = (x >> 16) & 0xff;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
34 c[2] = (x >> 8) & 0xff;
34697
ce77b0563228 bitmanipulation: reformat with clang-format
Augie Fackler <augie@google.com>
parents: 32669
diff changeset
35 c[3] = (x)&0xff;
29444
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
36 }
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
37
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
38 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
39 {
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
40 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
41 double ret;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
42 int i;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
43 uint64_t t = 0;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
44 for (i = 0; i < 8; i++) {
34697
ce77b0563228 bitmanipulation: reformat with clang-format
Augie Fackler <augie@google.com>
parents: 32669
diff changeset
45 t = (t << 8) + d[i];
29444
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
46 }
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
47 memcpy(&ret, &t, sizeof(t));
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
48 return ret;
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
49 }
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
50
284d742e5611 internals: move the bitmanipulation routines into its own file
Maciej Fijalkowski <fijall@gmail.com>
parents:
diff changeset
51 #endif