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 <cstring> |
5 | #include <cstring> |
|
|
6 | |
|
|
7 | #define PP_CONCAT_(a, b) a ## b |
|
|
8 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
|
|
9 | #define PP_STRINGIFY_(a) #a |
|
|
10 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
|
|
11 | |
|
|
12 | // actually, some gcc-3.x versions work, too |
|
|
13 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4) |
|
|
14 | |
|
|
15 | #ifndef __attribute__ |
|
|
16 | # if __GNUC__ |
|
|
17 | # if (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || (__GNUC__ < 2) |
|
|
18 | # define __attribute__(x) |
|
|
19 | # endif |
|
|
20 | # endif |
|
|
21 | # define __attribute__(x) |
|
|
22 | #endif |
|
|
23 | |
|
|
24 | #define NORETURN __attribute__ ((noreturn)) |
|
|
25 | #define UNUSED __attribute__ ((unused)) |
|
|
26 | #define CONST __attribute__ ((const)) |
|
|
27 | |
|
|
28 | // increases code size unless -fno-enforce-eh-specs |
|
|
29 | #if __GNUC__ |
|
|
30 | # define NOTHROW |
|
|
31 | # define THROW(x) |
|
|
32 | #else |
|
|
33 | # define NOTHROW throw() |
|
|
34 | # define THROW(x) throw x |
|
|
35 | #endif |
5 | |
36 | |
6 | extern class byteorder { |
37 | extern class byteorder { |
7 | static unsigned int e; // at least 32 bits |
38 | static unsigned int e; // at least 32 bits |
8 | public: |
39 | public: |
9 | byteorder (); |
40 | byteorder (); |
… | |
… | |
12 | static bool network () { return e == 0x11223344; }; |
43 | static bool network () { return e == 0x11223344; }; |
13 | static bool little_endian () { return e == 0x44332211; }; |
44 | static bool little_endian () { return e == 0x44332211; }; |
14 | static bool vax () { return e == 0x44332211; }; |
45 | static bool vax () { return e == 0x44332211; }; |
15 | } byteorder; |
46 | } byteorder; |
16 | |
47 | |
17 | template<typename T, typename U> |
48 | // various utility functions |
18 | static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
49 | 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> |
50 | 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 > (T)b ? a : (T)b; } |
51 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
|
|
52 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
|
|
53 | |
|
|
54 | 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 void clamp_it (T &v, U a, V b) { v = v < (T)a ? a : v >(T)b ? b : v; } |
|
|
56 | |
|
|
57 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
|
|
58 | |
|
|
59 | // linear interpolation |
21 | template<typename T, typename U, typename V> |
60 | template<typename T, typename U, typename P> |
22 | static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; } |
61 | static inline |
23 | template<typename T, typename U> |
62 | T lerp (T a, U b, P p) |
24 | static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
63 | { |
|
|
64 | return (int(a) * int(p) + int(b) * int(100 - p)) / 100; |
|
|
65 | } |
|
|
66 | |
|
|
67 | // some bit functions, xft fuck me plenty |
|
|
68 | #if HAVE_GCC_BUILTINS |
|
|
69 | static inline int ctz (unsigned int x) CONST { return __builtin_ctz (x); } |
|
|
70 | static inline int popcount (unsigned int x) CONST { return __builtin_popcount (x); } |
|
|
71 | #else |
|
|
72 | // count trailing zero bits and count # of one bits |
|
|
73 | int ctz (unsigned int x) CONST; |
|
|
74 | int popcount (unsigned int x) CONST; |
|
|
75 | #endif |
25 | |
76 | |
26 | // in range including end |
77 | // in range including end |
27 | #define IN_RANGE_INC(val,beg,end) \ |
78 | #define IN_RANGE_INC(val,beg,end) \ |
28 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
79 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
29 | |
80 | |
30 | // in range excluding end |
81 | // in range excluding end |
31 | #define IN_RANGE_EXC(val,beg,end) \ |
82 | #define IN_RANGE_EXC(val,beg,end) \ |
32 | ((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)) |
33 | |
84 | |
|
|
85 | // makes dynamically allocated objects zero-initialised |
34 | struct zero_initialized { |
86 | struct zero_initialized { |
35 | void *operator new (size_t s); |
87 | void *operator new (size_t s); |
36 | void operator delete (void *p, size_t s); |
88 | void operator delete (void *p, size_t s); |
37 | }; |
89 | }; |
38 | |
90 | |
… | |
… | |
248 | return pos; |
300 | return pos; |
249 | } |
301 | } |
250 | void erase (iterator first, iterator last) |
302 | void erase (iterator first, iterator last) |
251 | { |
303 | { |
252 | if (last != first) { |
304 | if (last != first) { |
253 | memmove (first, last, (end ()-last)*sizeof (T)); |
305 | memmove (first, last, (end () - last) * sizeof (T)); |
254 | _last -= last - first; |
306 | _last -= last - first; |
255 | } |
307 | } |
256 | } |
308 | } |
257 | void erase (iterator pos) |
309 | void erase (iterator pos) |
258 | { |
310 | { |
259 | if (pos != end ()) { |
311 | if (pos != end ()) { |
260 | memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); |
312 | memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T)); |
261 | --_last; |
313 | --_last; |
262 | } |
314 | } |
263 | } |
315 | } |
264 | void swap (simplevec<T> &t) |
316 | void swap (simplevec<T> &t) |
265 | { |
317 | { |
… | |
… | |
383 | struct stringvec : simplevec<char *> |
435 | struct stringvec : simplevec<char *> |
384 | { |
436 | { |
385 | ~stringvec () |
437 | ~stringvec () |
386 | { |
438 | { |
387 | for (char **c = begin (); c != end (); c++) |
439 | for (char **c = begin (); c != end (); c++) |
388 | delete [] *c; |
440 | free (*c); |
389 | } |
441 | } |
390 | }; |
442 | }; |
391 | |
443 | |
|
|
444 | // return a very temporary (and never deallocated) buffer. keep small. |
|
|
445 | void *rxvt_temp_buf (int len); |
|
|
446 | |
|
|
447 | template<typename T> |
|
|
448 | static inline T * |
|
|
449 | rxvt_temp_buf (int len) |
|
|
450 | { |
|
|
451 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
|
|
452 | } |
|
|
453 | |
392 | #endif |
454 | #endif |
393 | |
455 | |