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 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4)) |
13 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4) |
15 | |
14 | #define HAVE_GCC_BUILTINS 0 |
16 | #ifndef __attribute__ |
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17 | # if __GNUC__ |
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18 | # if (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || (__GNUC__ < 2) |
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19 | # define __attribute__(x) |
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20 | # endif |
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21 | # endif |
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22 | # define __attribute__(x) |
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23 | #endif |
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24 | |
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25 | #define NORETURN __attribute__ ((noreturn)) |
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26 | #define UNUSED __attribute__ ((unused)) |
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27 | #define CONST __attribute__ ((const)) |
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28 | |
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29 | // increases code size unless -fno-enforce-eh-specs |
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30 | #if __GNUC__ |
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31 | # define NOTHROW |
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32 | # define THROW(x) |
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33 | #else |
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34 | # define NOTHROW throw() |
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35 | # define THROW(x) throw x |
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36 | #endif |
15 | |
37 | |
16 | extern class byteorder { |
38 | extern class byteorder { |
17 | static unsigned int e; // at least 32 bits |
39 | static unsigned int e; // at least 32 bits |
18 | public: |
40 | public: |
19 | byteorder (); |
41 | 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; } |
55 | 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; } |
56 | 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 | |
57 | |
36 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
58 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
37 | |
59 | |
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60 | template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); } |
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61 | |
38 | // linear interpolation |
62 | // linear interpolation |
39 | template<typename T, typename U, typename P> |
63 | template<typename T, typename U, typename P> |
40 | static inline |
64 | static inline |
41 | T lerp (T a, U b, P p) |
65 | T lerp (T a, U b, P p) |
42 | { |
66 | { |
43 | return (int(a) * int(p) + int(b) * int(100 - p)) / 100; |
67 | return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100; |
44 | } |
68 | } |
45 | |
69 | |
46 | // some bit functions, xft fuck me plenty |
70 | // some bit functions, xft fuck me plenty |
47 | #if HAVE_GCC_BUILTINS |
71 | #if HAVE_GCC_BUILTINS |
48 | static inline int ctz (unsigned int x) { return __builtin_ctz (x); } |
72 | static inline int ctz (unsigned int x) CONST { return __builtin_ctz (x); } |
49 | static inline int popcount (unsigned int x) { return __builtin_popcount (x); } |
73 | static inline int popcount (unsigned int x) CONST { return __builtin_popcount (x); } |
50 | #else |
74 | #else |
51 | // count trailing zero bits and count # of one bits |
75 | // count trailing zero bits and count # of one bits |
52 | int ctz (unsigned int x); |
76 | int ctz (unsigned int x) CONST; |
53 | int popcount (unsigned int x); |
77 | int popcount (unsigned int x) CONST; |
54 | #endif |
78 | #endif |
55 | |
79 | |
56 | // in range including end |
80 | // in range including end |
57 | #define IN_RANGE_INC(val,beg,end) \ |
81 | #define IN_RANGE_INC(val,beg,end) \ |
58 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
82 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
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66 | void *operator new (size_t s); |
90 | void *operator new (size_t s); |
67 | void operator delete (void *p, size_t s); |
91 | void operator delete (void *p, size_t s); |
68 | }; |
92 | }; |
69 | |
93 | |
70 | /* simplevec taken (and heavily modified), from: |
94 | /* simplevec taken (and heavily modified), from: |
71 | * |
95 | * |
72 | * MICO --- a free CORBA implementation |
96 | * MICO --- a free CORBA implementation |
73 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
97 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
74 | */ |
98 | */ |
75 | template<class T> |
99 | template<class T> |
76 | struct simplevec { |
100 | struct simplevec { |
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422 | |
446 | |
423 | // return a very temporary (and never deallocated) buffer. keep small. |
447 | // return a very temporary (and never deallocated) buffer. keep small. |
424 | void *rxvt_temp_buf (int len); |
448 | void *rxvt_temp_buf (int len); |
425 | |
449 | |
426 | template<typename T> |
450 | template<typename T> |
427 | inline T * |
451 | static inline T * |
428 | rxvt_temp_buf (int len) |
452 | rxvt_temp_buf (int len) |
429 | { |
453 | { |
430 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
454 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
431 | } |
455 | } |
432 | |
456 | |