| 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 |
| 9 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
10 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
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11 | |
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12 | // actually, some gcc-3.x versions work, too |
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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 (); |
| … | |
… | |
| 27 | |
31 | |
| 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; } |
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; } |
| 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; } |
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; } |
| 30 | |
34 | |
| 31 | 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; } |
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36 | |
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37 | // linear interpolation |
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38 | template<typename T, typename U, typename P> |
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39 | static inline |
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40 | T lerp (T a, U b, P p) |
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41 | { |
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42 | return (int(a) * int(p) + int(b) * int(100 - p)) / 100; |
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43 | } |
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44 | |
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45 | // some bit functions, xft fuck me plenty |
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46 | #if HAVE_GCC_BUILTINS |
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47 | static inline int ctz (unsigned int x) { return __builtin_ctz (x); } |
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48 | static inline int popcount (unsigned int x) { return __builtin_popcount (x); } |
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49 | #else |
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50 | // count trailing zero bits and count # of one bits |
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51 | int ctz (unsigned int x); |
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52 | int popcount (unsigned int x); |
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53 | #endif |
| 32 | |
54 | |
| 33 | // in range including end |
55 | // in range including end |
| 34 | #define IN_RANGE_INC(val,beg,end) \ |
56 | #define IN_RANGE_INC(val,beg,end) \ |
| 35 | ((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)) |
| 36 | |
58 | |
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| 256 | return pos; |
278 | return pos; |
| 257 | } |
279 | } |
| 258 | void erase (iterator first, iterator last) |
280 | void erase (iterator first, iterator last) |
| 259 | { |
281 | { |
| 260 | if (last != first) { |
282 | if (last != first) { |
| 261 | memmove (first, last, (end ()-last)*sizeof (T)); |
283 | memmove (first, last, (end () - last) * sizeof (T)); |
| 262 | _last -= last - first; |
284 | _last -= last - first; |
| 263 | } |
285 | } |
| 264 | } |
286 | } |
| 265 | void erase (iterator pos) |
287 | void erase (iterator pos) |
| 266 | { |
288 | { |
| 267 | if (pos != end ()) { |
289 | if (pos != end ()) { |
| 268 | memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); |
290 | memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T)); |
| 269 | --_last; |
291 | --_last; |
| 270 | } |
292 | } |
| 271 | } |
293 | } |
| 272 | void swap (simplevec<T> &t) |
294 | void swap (simplevec<T> &t) |
| 273 | { |
295 | { |
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| 391 | struct stringvec : simplevec<char *> |
413 | struct stringvec : simplevec<char *> |
| 392 | { |
414 | { |
| 393 | ~stringvec () |
415 | ~stringvec () |
| 394 | { |
416 | { |
| 395 | for (char **c = begin (); c != end (); c++) |
417 | for (char **c = begin (); c != end (); c++) |
| 396 | delete [] *c; |
418 | free (*c); |
| 397 | } |
419 | } |
| 398 | }; |
420 | }; |
| 399 | |
421 | |
| 400 | // temporarily replace the process environment |
422 | // return a very temporary (and never deallocated) buffer. keep small. |
| 401 | extern char **environ; |
423 | void *rxvt_temp_buf (int len); |
| 402 | |
424 | |
| 403 | struct temp_environ |
425 | template<typename T> |
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426 | inline T * |
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427 | rxvt_temp_buf (int len) |
| 404 | { |
428 | { |
| 405 | char **prev; |
429 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
| 406 | |
430 | } |
| 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 | |
431 | |
| 420 | #endif |
432 | #endif |
| 421 | |
433 | |
