1 | #ifndef RXVT_UTIL_H |
1 | #ifndef RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
3 | |
3 | |
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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 |
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17 | static bool network () { return e == 0x11223344; }; |
18 | static bool network () { return e == 0x11223344; }; |
18 | static bool little_endian () { return e == 0x44332211; }; |
19 | static bool little_endian () { return e == 0x44332211; }; |
19 | static bool vax () { return e == 0x44332211; }; |
20 | static bool vax () { return e == 0x44332211; }; |
20 | } byteorder; |
21 | } byteorder; |
21 | |
22 | |
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23 | // various utility functions |
22 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
24 | 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; } |
25 | 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; } |
26 | 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; } |
27 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
26 | |
28 | |
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; } |
29 | 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; } |
30 | 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 | |
31 | |
30 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
32 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
31 | |
33 | |
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34 | // linear interpolation |
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35 | template<typename T, typename U, typename P> |
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36 | static inline |
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37 | T lerp (T a, U b, P p) |
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38 | { |
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39 | return (int(a) * int(p) + int(b) * int(100 - p)) / 100; |
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40 | } |
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41 | |
32 | // in range including end |
42 | // in range including end |
33 | #define IN_RANGE_INC(val,beg,end) \ |
43 | #define IN_RANGE_INC(val,beg,end) \ |
34 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
44 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
35 | |
45 | |
36 | // in range excluding end |
46 | // in range excluding end |
37 | #define IN_RANGE_EXC(val,beg,end) \ |
47 | #define IN_RANGE_EXC(val,beg,end) \ |
38 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
48 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
39 | |
49 | |
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50 | // makes dynamically allocated objects zero-initialised |
40 | struct zero_initialized { |
51 | struct zero_initialized { |
41 | void *operator new (size_t s); |
52 | void *operator new (size_t s); |
42 | void operator delete (void *p, size_t s); |
53 | void operator delete (void *p, size_t s); |
43 | }; |
54 | }; |
44 | |
55 | |
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254 | return pos; |
265 | return pos; |
255 | } |
266 | } |
256 | void erase (iterator first, iterator last) |
267 | void erase (iterator first, iterator last) |
257 | { |
268 | { |
258 | if (last != first) { |
269 | if (last != first) { |
259 | memmove (first, last, (end ()-last)*sizeof (T)); |
270 | memmove (first, last, (end () - last) * sizeof (T)); |
260 | _last -= last - first; |
271 | _last -= last - first; |
261 | } |
272 | } |
262 | } |
273 | } |
263 | void erase (iterator pos) |
274 | void erase (iterator pos) |
264 | { |
275 | { |
265 | if (pos != end ()) { |
276 | if (pos != end ()) { |
266 | memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); |
277 | memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T)); |
267 | --_last; |
278 | --_last; |
268 | } |
279 | } |
269 | } |
280 | } |
270 | void swap (simplevec<T> &t) |
281 | void swap (simplevec<T> &t) |
271 | { |
282 | { |
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389 | struct stringvec : simplevec<char *> |
400 | struct stringvec : simplevec<char *> |
390 | { |
401 | { |
391 | ~stringvec () |
402 | ~stringvec () |
392 | { |
403 | { |
393 | for (char **c = begin (); c != end (); c++) |
404 | for (char **c = begin (); c != end (); c++) |
394 | delete [] *c; |
405 | free (*c); |
395 | } |
406 | } |
396 | }; |
407 | }; |
397 | |
408 | |
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409 | // return a very temporary (and never deallocated) buffer. keep small. |
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410 | void *rxvt_temp_buf (int len); |
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411 | |
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412 | template<typename T> |
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413 | inline T * |
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414 | rxvt_temp_buf (int len) |
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415 | { |
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416 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
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417 | } |
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418 | |
398 | #endif |
419 | #endif |
399 | |
420 | |