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> |
5 | |
6 | |
6 | #define PP_CONCAT_(a, b) a ## b |
7 | #define PP_CONCAT_(a, b) a ## b |
7 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
8 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
8 | #define PP_STRINGIFY_(a) #a |
9 | #define PP_STRINGIFY_(a) #a |
9 | #define PP_STRINGIFY(a) PP_STRINGIFY_(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) |
10 | |
14 | |
11 | extern class byteorder { |
15 | extern class byteorder { |
12 | static unsigned int e; // at least 32 bits |
16 | static unsigned int e; // at least 32 bits |
13 | public: |
17 | public: |
14 | byteorder (); |
18 | byteorder (); |
… | |
… | |
17 | static bool network () { return e == 0x11223344; }; |
21 | static bool network () { return e == 0x11223344; }; |
18 | static bool little_endian () { return e == 0x44332211; }; |
22 | static bool little_endian () { return e == 0x44332211; }; |
19 | static bool vax () { return e == 0x44332211; }; |
23 | static bool vax () { return e == 0x44332211; }; |
20 | } byteorder; |
24 | } byteorder; |
21 | |
25 | |
|
|
26 | // various utility functions |
22 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
27 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
23 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
28 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
24 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
29 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
25 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
30 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
26 | |
31 | |
27 | 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; } |
32 | 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; } |
28 | 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; } |
33 | 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; } |
29 | |
34 | |
30 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
35 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
31 | |
36 | |
|
|
37 | // linear interpolation |
|
|
38 | template<typename T, typename U, typename P> |
|
|
39 | static inline |
|
|
40 | T lerp (T a, U b, P p) |
|
|
41 | { |
|
|
42 | return (int(a) * int(p) + int(b) * int(100 - p)) / 100; |
|
|
43 | } |
|
|
44 | |
|
|
45 | // some bit functions, xft fuck me plenty |
|
|
46 | #if HAVE_GCC_BUILTINS |
|
|
47 | static inline int ctz (unsigned int x) { return __builtin_ctz (x); } |
|
|
48 | static inline int popcount (unsigned int x) { return __builtin_popcount (x); } |
|
|
49 | #else |
|
|
50 | // count trailing zero bits and count # of one bits |
|
|
51 | int ctz (unsigned int x); |
|
|
52 | int popcount (unsigned int x); |
|
|
53 | #endif |
|
|
54 | |
32 | // in range including end |
55 | // in range including end |
33 | #define IN_RANGE_INC(val,beg,end) \ |
56 | #define IN_RANGE_INC(val,beg,end) \ |
34 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
57 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
35 | |
58 | |
36 | // in range excluding end |
59 | // in range excluding end |
37 | #define IN_RANGE_EXC(val,beg,end) \ |
60 | #define IN_RANGE_EXC(val,beg,end) \ |
38 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
61 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
39 | |
62 | |
|
|
63 | // makes dynamically allocated objects zero-initialised |
40 | struct zero_initialized { |
64 | struct zero_initialized { |
41 | void *operator new (size_t s); |
65 | void *operator new (size_t s); |
42 | void operator delete (void *p, size_t s); |
66 | void operator delete (void *p, size_t s); |
43 | }; |
67 | }; |
44 | |
68 | |
… | |
… | |
254 | return pos; |
278 | return pos; |
255 | } |
279 | } |
256 | void erase (iterator first, iterator last) |
280 | void erase (iterator first, iterator last) |
257 | { |
281 | { |
258 | if (last != first) { |
282 | if (last != first) { |
259 | memmove (first, last, (end ()-last)*sizeof (T)); |
283 | memmove (first, last, (end () - last) * sizeof (T)); |
260 | _last -= last - first; |
284 | _last -= last - first; |
261 | } |
285 | } |
262 | } |
286 | } |
263 | void erase (iterator pos) |
287 | void erase (iterator pos) |
264 | { |
288 | { |
265 | if (pos != end ()) { |
289 | if (pos != end ()) { |
266 | memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); |
290 | memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T)); |
267 | --_last; |
291 | --_last; |
268 | } |
292 | } |
269 | } |
293 | } |
270 | void swap (simplevec<T> &t) |
294 | void swap (simplevec<T> &t) |
271 | { |
295 | { |
… | |
… | |
389 | struct stringvec : simplevec<char *> |
413 | struct stringvec : simplevec<char *> |
390 | { |
414 | { |
391 | ~stringvec () |
415 | ~stringvec () |
392 | { |
416 | { |
393 | for (char **c = begin (); c != end (); c++) |
417 | for (char **c = begin (); c != end (); c++) |
394 | delete [] *c; |
418 | free (*c); |
395 | } |
419 | } |
396 | }; |
420 | }; |
397 | |
421 | |
|
|
422 | // return a very temporary (and never deallocated) buffer. keep small. |
|
|
423 | void *rxvt_temp_buf (int len); |
|
|
424 | |
|
|
425 | template<typename T> |
|
|
426 | inline T * |
|
|
427 | rxvt_temp_buf (int len) |
|
|
428 | { |
|
|
429 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
|
|
430 | } |
|
|
431 | |
398 | #endif |
432 | #endif |
399 | |
433 | |