1 | #ifndef RXVT_UTIL_H |
1 | #ifndef RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
3 | |
3 | |
4 | #include <cstdlib> |
4 | #include <cstdlib> |
5 | #include <cstring> |
5 | #include <cstring> |
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6 | |
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7 | using namespace std; |
6 | |
8 | |
7 | #define PP_CONCAT_(a, b) a ## b |
9 | #define PP_CONCAT_(a, b) a ## b |
8 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
10 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
9 | #define PP_STRINGIFY_(a) #a |
11 | #define PP_STRINGIFY_(a) #a |
10 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
12 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
11 | |
13 | |
12 | // actually, some gcc-3.x versions work, too |
14 | // actually, some gcc-3.x versions work, too |
13 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4) |
15 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4) |
14 | #define HAVE_GCC_BUILTINS 0 |
16 | |
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17 | #ifndef __attribute__ |
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18 | # if __GNUC__ |
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19 | # if (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || (__GNUC__ < 2) |
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20 | # define __attribute__(x) |
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21 | # endif |
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22 | # endif |
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23 | # define __attribute__(x) |
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24 | #endif |
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25 | |
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26 | #define NORETURN __attribute__ ((noreturn)) |
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27 | #define UNUSED __attribute__ ((unused)) |
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28 | #define CONST __attribute__ ((const)) |
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29 | |
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30 | // increases code size unless -fno-enforce-eh-specs |
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31 | #if __GNUC__ |
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32 | # define NOTHROW |
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33 | # define THROW(x) |
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34 | #else |
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35 | # define NOTHROW throw() |
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36 | # define THROW(x) throw x |
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37 | #endif |
15 | |
38 | |
16 | extern class byteorder { |
39 | extern class byteorder { |
17 | static unsigned int e; // at least 32 bits |
40 | static unsigned int e; // at least 32 bits |
18 | public: |
41 | public: |
19 | byteorder (); |
42 | byteorder (); |
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33 | template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; } |
56 | template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; } |
34 | template<typename T, typename U, typename V> static inline void clamp_it (T &v, U a, V b) { v = v < (T)a ? a : v >(T)b ? b : v; } |
57 | template<typename T, typename U, typename V> static inline void clamp_it (T &v, U a, V b) { v = v < (T)a ? a : v >(T)b ? b : v; } |
35 | |
58 | |
36 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
59 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
37 | |
60 | |
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61 | template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); } |
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62 | |
38 | // linear interpolation |
63 | // linear interpolation |
39 | template<typename T, typename U, typename P> |
64 | template<typename T, typename U, typename P> |
40 | static inline |
65 | static inline |
41 | T lerp (T a, U b, P p) |
66 | T lerp (T a, U b, P p) |
42 | { |
67 | { |
43 | return (int(a) * int(p) + int(b) * int(100 - p)) / 100; |
68 | return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100; |
44 | } |
69 | } |
45 | |
70 | |
46 | // some bit functions, xft fuck me plenty |
71 | // some bit functions, xft fuck me plenty |
47 | #if HAVE_GCC_BUILTINS |
72 | #if HAVE_GCC_BUILTINS |
48 | static inline int ctz (unsigned int x) { return __builtin_ctz (x); } |
73 | static inline int ctz (unsigned int x) CONST { return __builtin_ctz (x); } |
49 | static inline int popcount (unsigned int x) { return __builtin_popcount (x); } |
74 | static inline int popcount (unsigned int x) CONST { return __builtin_popcount (x); } |
50 | #else |
75 | #else |
51 | // count trailing zero bits and count # of one bits |
76 | // count trailing zero bits and count # of one bits |
52 | int ctz (unsigned int x); |
77 | int ctz (unsigned int x) CONST; |
53 | int popcount (unsigned int x); |
78 | int popcount (unsigned int x) CONST; |
54 | #endif |
79 | #endif |
55 | |
80 | |
56 | // in range including end |
81 | // in range including end |
57 | #define IN_RANGE_INC(val,beg,end) \ |
82 | #define IN_RANGE_INC(val,beg,end) \ |
58 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
83 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
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422 | |
447 | |
423 | // return a very temporary (and never deallocated) buffer. keep small. |
448 | // return a very temporary (and never deallocated) buffer. keep small. |
424 | void *rxvt_temp_buf (int len); |
449 | void *rxvt_temp_buf (int len); |
425 | |
450 | |
426 | template<typename T> |
451 | template<typename T> |
427 | inline T * |
452 | static inline T * |
428 | rxvt_temp_buf (int len) |
453 | rxvt_temp_buf (int len) |
429 | { |
454 | { |
430 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
455 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
431 | } |
456 | } |
432 | |
457 | |