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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27 | |
28 | |
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 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 | 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 | |
31 | 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; } |
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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 | } |
32 | |
41 | |
33 | // in range including end |
42 | // in range including end |
34 | #define IN_RANGE_INC(val,beg,end) \ |
43 | #define IN_RANGE_INC(val,beg,end) \ |
35 | ((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)) |
36 | |
45 | |
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256 | return pos; |
265 | return pos; |
257 | } |
266 | } |
258 | void erase (iterator first, iterator last) |
267 | void erase (iterator first, iterator last) |
259 | { |
268 | { |
260 | if (last != first) { |
269 | if (last != first) { |
261 | memmove (first, last, (end ()-last)*sizeof (T)); |
270 | memmove (first, last, (end () - last) * sizeof (T)); |
262 | _last -= last - first; |
271 | _last -= last - first; |
263 | } |
272 | } |
264 | } |
273 | } |
265 | void erase (iterator pos) |
274 | void erase (iterator pos) |
266 | { |
275 | { |
267 | if (pos != end ()) { |
276 | if (pos != end ()) { |
268 | memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); |
277 | memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T)); |
269 | --_last; |
278 | --_last; |
270 | } |
279 | } |
271 | } |
280 | } |
272 | void swap (simplevec<T> &t) |
281 | void swap (simplevec<T> &t) |
273 | { |
282 | { |
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391 | struct stringvec : simplevec<char *> |
400 | struct stringvec : simplevec<char *> |
392 | { |
401 | { |
393 | ~stringvec () |
402 | ~stringvec () |
394 | { |
403 | { |
395 | for (char **c = begin (); c != end (); c++) |
404 | for (char **c = begin (); c != end (); c++) |
396 | delete [] *c; |
405 | free (*c); |
397 | } |
406 | } |
398 | }; |
407 | }; |
399 | |
408 | |
400 | // temporarily replace the process environment |
409 | // return a very temporary (and never deallocated) buffer. keep small. |
401 | extern char **environ; |
410 | void *rxvt_temp_buf (int len); |
402 | |
411 | |
403 | struct temp_environ |
412 | template<typename T> |
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413 | inline T * |
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414 | rxvt_temp_buf (int len) |
404 | { |
415 | { |
405 | char **prev; |
416 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
406 | |
417 | } |
407 | temp_environ (const stringvec *envv) |
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408 | : prev (environ) |
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409 | { |
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410 | if (envv) |
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411 | environ = (char **)envv->begin (); |
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412 | } |
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413 | |
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414 | ~temp_environ () |
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415 | { |
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416 | environ = prev; |
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417 | } |
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418 | }; |
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419 | |
418 | |
420 | #endif |
419 | #endif |
421 | |
420 | |