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 3 of the License, or |
11 | * (at your option) any later version. |
11 | * (at your option) any later version. |
12 | * |
12 | * |
13 | * This program is distributed in the hope that it will be useful, |
13 | * This program is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 | * You should have received a copy of the GNU General Public License |
18 | * You should have received a copy of the GNU General Public License |
19 | * along with this program; if not, write to the Free Software |
19 | * along with this program; if not, write to the Free Software |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
21 | *----------------------------------------------------------------------*/ |
21 | *----------------------------------------------------------------------*/ |
22 | |
22 | |
23 | #include <cstdlib> |
23 | #include <stdlib.h> |
24 | #include <cstring> |
24 | #include <string.h> |
25 | #include <inttypes.h> |
25 | #include <inttypes.h> |
26 | |
26 | |
27 | #include "rxvtutil.h" |
27 | #include "rxvtutil.h" |
28 | |
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29 | class byteorder byteorder; |
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30 | |
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31 | unsigned int byteorder::e; |
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32 | |
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33 | byteorder::byteorder () |
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34 | { |
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35 | union { |
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36 | uint32_t u; |
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37 | uint8_t b[4]; |
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38 | } w; |
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39 | |
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40 | w.b[0] = 0x11; |
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41 | w.b[1] = 0x22; |
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42 | w.b[2] = 0x33; |
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43 | w.b[3] = 0x44; |
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44 | |
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45 | e = w.u; |
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46 | } |
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47 | |
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48 | #if !HAVE_GCC_BUILTINS |
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49 | int ctz (unsigned int x) CONST |
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50 | { |
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51 | int r = 0; |
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52 | |
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53 | x &= -x; // this isolates the lowest bit |
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54 | |
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55 | if (x & 0xaaaaaaaa) r += 1; |
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56 | if (x & 0xcccccccc) r += 2; |
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57 | if (x & 0xf0f0f0f0) r += 4; |
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58 | if (x & 0xff00ff00) r += 8; |
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59 | if (x & 0xffff0000) r += 16; |
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60 | |
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61 | return r; |
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62 | } |
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63 | |
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64 | int popcount (unsigned int x) CONST |
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65 | { |
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66 | x -= (x >> 1) & 0x55555555; |
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67 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
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68 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
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69 | x *= 0x01010101; |
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70 | |
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71 | return x >> 24; |
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72 | } |
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73 | #endif |
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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); |
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92 | |
46 | |
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 | { |
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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 | } |
104 | |
59 | |
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60 | // we include emman.c here to avoid relying on a C compiler, or |
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61 | // on the c++ compiler not complaining about .c, which is unlikely, |
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62 | // but... |
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63 | #include "emman.c" |
105 | |
64 | |