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| 3 | #include <inttypes.h> |
3 | #include <inttypes.h> |
| 4 | |
4 | |
| 5 | #include "rxvtutil.h" |
5 | #include "rxvtutil.h" |
| 6 | |
6 | |
| 7 | class byteorder byteorder; |
7 | class byteorder byteorder; |
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8 | |
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9 | unsigned int byteorder::e; |
| 8 | |
10 | |
| 9 | byteorder::byteorder () |
11 | byteorder::byteorder () |
| 10 | { |
12 | { |
| 11 | union { |
13 | union { |
| 12 | uint32_t u; |
14 | uint32_t u; |
| … | |
… | |
| 19 | w.b[3] = 0x44; |
21 | w.b[3] = 0x44; |
| 20 | |
22 | |
| 21 | e = w.u; |
23 | e = w.u; |
| 22 | } |
24 | } |
| 23 | |
25 | |
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26 | #if !HAVE_GCC_BUILTINS |
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27 | int ctz (unsigned int x) CONST |
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28 | { |
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29 | int r = 0; |
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30 | |
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31 | x &= -x; // this isolates the lowest bit |
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32 | |
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33 | if (x & 0xaaaaaaaa) r += 1; |
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34 | if (x & 0xcccccccc) r += 2; |
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35 | if (x & 0xf0f0f0f0) r += 4; |
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36 | if (x & 0xff00ff00) r += 8; |
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37 | if (x & 0xffff0000) r += 16; |
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38 | |
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39 | return r; |
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40 | } |
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41 | |
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42 | int popcount (unsigned int x) CONST |
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43 | { |
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44 | x -= (x >> 1) & 0x55555555; |
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45 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
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46 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
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47 | x *= 0x01010101; |
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48 | |
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49 | return x >> 24; |
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50 | } |
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51 | #endif |
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52 | |
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53 | void * |
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54 | zero_initialized::operator new (size_t s) |
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55 | { |
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56 | void *p = malloc (s); |
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57 | |
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58 | memset (p, 0, s); |
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59 | return p; |
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60 | } |
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61 | |
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62 | void |
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63 | zero_initialized::operator delete (void *p, size_t s) |
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64 | { |
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65 | free (p); |
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66 | } |
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67 | |
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68 | static void *temp_buf; |
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69 | static uint32_t temp_len; |
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70 | |
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71 | void * |
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72 | rxvt_temp_buf (int len) |
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73 | { |
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74 | if (len > temp_len) |
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75 | { |
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76 | free (temp_buf); |
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77 | temp_buf = malloc (len); |
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78 | temp_len = len; |
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79 | } |
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80 | |
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81 | return temp_buf; |
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82 | } |
| 24 | |
83 | |
| 25 | |
84 | |
