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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 | |
28 | |
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 |
29 | #if !HAVE_GCC_BUILTINS |
49 | int ctz (unsigned int x) CONST |
30 | int rxvt_ctz (unsigned int x) CONST |
50 | { |
31 | { |
51 | int r = 0; |
32 | int r = 0; |
52 | |
33 | |
53 | x &= -x; // this isolates the lowest bit |
34 | x &= -x; // this isolates the lowest bit |
54 | |
35 | |
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59 | if (x & 0xffff0000) r += 16; |
40 | if (x & 0xffff0000) r += 16; |
60 | |
41 | |
61 | return r; |
42 | return r; |
62 | } |
43 | } |
63 | |
44 | |
64 | int popcount (unsigned int x) CONST |
45 | int rxvt_popcount (unsigned int x) CONST |
65 | { |
46 | { |
66 | x -= (x >> 1) & 0x55555555; |
47 | x -= (x >> 1) & 0x55555555; |
67 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
48 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
68 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
49 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
69 | x *= 0x01010101; |
50 | x *= 0x01010101; |
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92 | |
73 | |
93 | void * |
74 | void * |
94 | rxvt_temp_buf (int len) |
75 | rxvt_temp_buf (int len) |
95 | { |
76 | { |
96 | if (len > temp_len) |
77 | if (len > temp_len) |
97 | { |
78 | { |
98 | temp_buf = realloc (temp_buf, len); |
79 | temp_buf = realloc (temp_buf, len); |
99 | temp_len = len; |
80 | temp_len = len; |
100 | } |
81 | } |
101 | |
82 | |
102 | return temp_buf; |
83 | return temp_buf; |
103 | } |
84 | } |
104 | |
85 | |
105 | |
86 | |