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1 | /*----------------------------------------------------------------------* |
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2 | * File: rxvtutil.C |
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3 | *----------------------------------------------------------------------* |
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4 | * |
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5 | * All portions of code are copyright by their respective author/s. |
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6 | * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> |
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7 | * |
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8 | * This program is free software; you can redistribute it and/or modify |
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9 | * it under the terms of the GNU General Public License as published by |
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10 | * the Free Software Foundation; either version 2 of the License, or |
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11 | * (at your option) any later version. |
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12 | * |
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13 | * This program is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | * GNU General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU General Public License |
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19 | * along with this program; if not, write to the Free Software |
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20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 | *----------------------------------------------------------------------*/ |
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22 | |
| 1 | #include <cstdlib> |
23 | #include <cstdlib> |
| 2 | #include <cstring> |
24 | #include <cstring> |
| 3 | #include <inttypes.h> |
25 | #include <inttypes.h> |
| 4 | |
26 | |
| 5 | #include "rxvtutil.h" |
27 | #include "rxvtutil.h" |
| 6 | |
28 | |
| 7 | class byteorder byteorder; |
29 | #if !HAVE_GCC_BUILTINS |
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30 | int rxvt_ctz (unsigned int x) CONST |
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31 | { |
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32 | int r = 0; |
| 8 | |
33 | |
| 9 | byteorder::byteorder () |
34 | x &= -x; // this isolates the lowest bit |
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35 | |
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36 | if (x & 0xaaaaaaaa) r += 1; |
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37 | if (x & 0xcccccccc) r += 2; |
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38 | if (x & 0xf0f0f0f0) r += 4; |
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39 | if (x & 0xff00ff00) r += 8; |
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40 | if (x & 0xffff0000) r += 16; |
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41 | |
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42 | return r; |
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43 | } |
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44 | |
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45 | int rxvt_popcount (unsigned int x) CONST |
| 10 | { |
46 | { |
| 11 | union { |
47 | x -= (x >> 1) & 0x55555555; |
| 12 | uint32_t u; |
48 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
| 13 | uint8_t b[4]; |
49 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
| 14 | } w; |
50 | x *= 0x01010101; |
| 15 | |
51 | |
| 16 | w.b[0] = 0x11; |
52 | return x >> 24; |
| 17 | w.b[1] = 0x22; |
53 | } |
| 18 | w.b[2] = 0x33; |
54 | #endif |
| 19 | w.b[3] = 0x44; |
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| 20 | |
55 | |
| 21 | e = w.u; |
56 | void * |
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57 | zero_initialized::operator new (size_t s) |
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58 | { |
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59 | void *p = malloc (s); |
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60 | |
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61 | memset (p, 0, s); |
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62 | return p; |
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63 | } |
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64 | |
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65 | void |
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66 | zero_initialized::operator delete (void *p, size_t s) |
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67 | { |
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68 | free (p); |
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69 | } |
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70 | |
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71 | static void *temp_buf; |
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72 | static uint32_t temp_len; |
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73 | |
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74 | void * |
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75 | rxvt_temp_buf (int len) |
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76 | { |
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77 | if (len > temp_len) |
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78 | { |
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79 | temp_buf = realloc (temp_buf, len); |
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80 | temp_len = len; |
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81 | } |
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82 | |
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83 | return temp_buf; |
| 22 | } |
84 | } |
| 23 | |
85 | |
| 24 | |
86 | |
| 25 | |
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