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| 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 | |
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| 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; |
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| 33 | |
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| 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 |
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| 46 | { |
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| 47 | x -= (x >> 1) & 0x55555555; |
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| 48 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
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| 49 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
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| 50 | x *= 0x01010101; |
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| 51 | |
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| 52 | return x >> 24; |
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| 53 | } |
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| 54 | #endif |
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| 55 | |
28 | |
| 56 | void * |
29 | void * |
| 57 | zero_initialized::operator new (size_t s) |
30 | zero_initialized::operator new (size_t s) |
| 58 | { |
31 | { |
| 59 | void *p = malloc (s); |
32 | void *p = malloc (s); |
