1 | /*----------------------------------------------------------------------* |
1 | /*----------------------------------------------------------------------* |
2 | * File: rxvtutil.C |
2 | * File: rxvtutil.C |
3 | *----------------------------------------------------------------------* |
3 | *----------------------------------------------------------------------* |
4 | * |
4 | * |
5 | * All portions of code are copyright by their respective author/s. |
5 | * All portions of code are copyright by their respective author/s. |
6 | * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> |
6 | * Copyright (c) 2004-2006 Marc Lehmann <schmorp@schmorp.de> |
7 | * |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by |
9 | * it under the terms of the GNU General Public License as published by |
10 | * the Free Software Foundation; either version 2 of the License, or |
10 | * the Free Software Foundation; either version 2 of the License, or |
11 | * (at your option) any later version. |
11 | * (at your option) any later version. |
… | |
… | |
24 | #include <cstring> |
24 | #include <cstring> |
25 | #include <inttypes.h> |
25 | #include <inttypes.h> |
26 | |
26 | |
27 | #include "rxvtutil.h" |
27 | #include "rxvtutil.h" |
28 | |
28 | |
29 | class byteorder byteorder; |
|
|
30 | |
|
|
31 | unsigned int byteorder::e; |
|
|
32 | |
|
|
33 | byteorder::byteorder () |
|
|
34 | { |
|
|
35 | union { |
|
|
36 | uint32_t u; |
|
|
37 | uint8_t b[4]; |
|
|
38 | } w; |
|
|
39 | |
|
|
40 | w.b[0] = 0x11; |
|
|
41 | w.b[1] = 0x22; |
|
|
42 | w.b[2] = 0x33; |
|
|
43 | w.b[3] = 0x44; |
|
|
44 | |
|
|
45 | e = w.u; |
|
|
46 | } |
|
|
47 | |
|
|
48 | #if !HAVE_GCC_BUILTINS |
29 | #if !HAVE_GCC_BUILTINS |
49 | int ctz (unsigned int x) CONST |
30 | int rxvt_ctz (unsigned int x) CONST |
50 | { |
31 | { |
51 | int r = 0; |
32 | int r = 0; |
52 | |
33 | |
53 | x &= -x; // this isolates the lowest bit |
34 | x &= -x; // this isolates the lowest bit |
54 | |
35 | |
… | |
… | |
59 | if (x & 0xffff0000) r += 16; |
40 | if (x & 0xffff0000) r += 16; |
60 | |
41 | |
61 | return r; |
42 | return r; |
62 | } |
43 | } |
63 | |
44 | |
64 | int popcount (unsigned int x) CONST |
45 | int rxvt_popcount (unsigned int x) CONST |
65 | { |
46 | { |
66 | x -= (x >> 1) & 0x55555555; |
47 | x -= (x >> 1) & 0x55555555; |
67 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
48 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
68 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
49 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
69 | x *= 0x01010101; |
50 | x *= 0x01010101; |
… | |
… | |
92 | |
73 | |
93 | void * |
74 | void * |
94 | rxvt_temp_buf (int len) |
75 | rxvt_temp_buf (int len) |
95 | { |
76 | { |
96 | if (len > temp_len) |
77 | if (len > temp_len) |
97 | { |
78 | { |
|
|
79 | free (temp_buf); |
98 | temp_buf = realloc (temp_buf, len); |
80 | temp_buf = malloc (len); |
99 | temp_len = len; |
81 | temp_len = len; |
100 | } |
82 | } |
101 | |
83 | |
102 | return temp_buf; |
84 | return temp_buf; |
103 | } |
85 | } |
104 | |
86 | |
105 | |
87 | |