1 | #ifndef RXVT_UTIL_H |
1 | #ifndef RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
3 | |
3 | |
4 | #include <cstring> |
4 | #include <cstring> |
|
|
5 | |
|
|
6 | #define PP_CONCAT_(a, b) a ## b |
|
|
7 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
|
|
8 | #define PP_STRINGIFY_(a) #a |
|
|
9 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
5 | |
10 | |
6 | extern class byteorder { |
11 | extern class byteorder { |
7 | static unsigned int e; // at least 32 bits |
12 | static unsigned int e; // at least 32 bits |
8 | public: |
13 | public: |
9 | byteorder (); |
14 | byteorder (); |
… | |
… | |
12 | static bool network () { return e == 0x11223344; }; |
17 | static bool network () { return e == 0x11223344; }; |
13 | static bool little_endian () { return e == 0x44332211; }; |
18 | static bool little_endian () { return e == 0x44332211; }; |
14 | static bool vax () { return e == 0x44332211; }; |
19 | static bool vax () { return e == 0x44332211; }; |
15 | } byteorder; |
20 | } byteorder; |
16 | |
21 | |
17 | template<typename T, typename U> |
22 | // various utility functions |
18 | static inline T min (T a, U b) { return a < b ? a : (T)b; } |
23 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
19 | template<typename T, typename U> |
24 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
20 | static inline T max (T a, U b) { return a > b ? a : (T)b; } |
25 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
21 | template<typename T> |
26 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
22 | static inline void swap (T& a, T& b) { T t=a; a=b; b=t; } |
|
|
23 | |
27 | |
|
|
28 | 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; } |
|
|
29 | 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; } |
|
|
30 | |
|
|
31 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
|
|
32 | |
|
|
33 | // in range including end |
24 | #define IN_RANGE(val,beg,end) \ |
34 | #define IN_RANGE_INC(val,beg,end) \ |
25 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
35 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
26 | |
36 | |
|
|
37 | // in range excluding end |
|
|
38 | #define IN_RANGE_EXC(val,beg,end) \ |
|
|
39 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
|
|
40 | |
|
|
41 | // makes dynamically allocated objects zero-initialised |
27 | struct zero_initialized { |
42 | struct zero_initialized { |
28 | void *operator new (size_t s); |
43 | void *operator new (size_t s); |
29 | void operator delete (void *p, size_t s); |
44 | void operator delete (void *p, size_t s); |
30 | }; |
45 | }; |
31 | |
46 | |