| 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. |
| … | |
… | |
| 23 | #include <cstdlib> |
23 | #include <cstdlib> |
| 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 | |
|
|
| 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 |
|
|
| 49 | int ctz (unsigned int x) CONST |
|
|
| 50 | { |
|
|
| 51 | int r = 0; |
|
|
| 52 | |
|
|
| 53 | x &= -x; // this isolates the lowest bit |
|
|
| 54 | |
|
|
| 55 | if (x & 0xaaaaaaaa) r += 1; |
|
|
| 56 | if (x & 0xcccccccc) r += 2; |
|
|
| 57 | if (x & 0xf0f0f0f0) r += 4; |
|
|
| 58 | if (x & 0xff00ff00) r += 8; |
|
|
| 59 | if (x & 0xffff0000) r += 16; |
|
|
| 60 | |
|
|
| 61 | return r; |
|
|
| 62 | } |
|
|
| 63 | |
|
|
| 64 | int popcount (unsigned int x) CONST |
|
|
| 65 | { |
|
|
| 66 | x -= (x >> 1) & 0x55555555; |
|
|
| 67 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
|
|
| 68 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
|
|
| 69 | x *= 0x01010101; |
|
|
| 70 | |
|
|
| 71 | return x >> 24; |
|
|
| 72 | } |
|
|
| 73 | #endif |
|
|
| 74 | |
28 | |
| 75 | void * |
29 | void * |
| 76 | zero_initialized::operator new (size_t s) |
30 | zero_initialized::operator new (size_t s) |
| 77 | { |
31 | { |
| 78 | void *p = malloc (s); |
32 | void *p = malloc (s); |
| … | |
… | |
| 93 | void * |
47 | void * |
| 94 | rxvt_temp_buf (int len) |
48 | rxvt_temp_buf (int len) |
| 95 | { |
49 | { |
| 96 | if (len > temp_len) |
50 | if (len > temp_len) |
| 97 | { |
51 | { |
|
|
52 | free (temp_buf); |
| 98 | temp_buf = realloc (temp_buf, len); |
53 | temp_buf = malloc (len); |
| 99 | temp_len = len; |
54 | temp_len = len; |
| 100 | } |
55 | } |
| 101 | |
56 | |
| 102 | return temp_buf; |
57 | return temp_buf; |
| 103 | } |
58 | } |
