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> |
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6 | |
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7 | using namespace std; |
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8 | |
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9 | #define PP_CONCAT_(a, b) a ## b |
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10 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
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11 | #define PP_STRINGIFY_(a) #a |
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12 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
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13 | |
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14 | // actually, some gcc-3.x versions work, too |
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15 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4) |
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16 | |
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17 | #ifndef __attribute__ |
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18 | # if __GNUC__ |
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19 | # if (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || (__GNUC__ < 2) |
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20 | # define __attribute__(x) |
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21 | # endif |
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22 | # endif |
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23 | # define __attribute__(x) |
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24 | #endif |
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25 | |
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26 | #define NORETURN __attribute__ ((noreturn)) |
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27 | #define UNUSED __attribute__ ((unused)) |
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28 | #define CONST __attribute__ ((const)) |
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29 | |
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30 | // increases code size unless -fno-enforce-eh-specs |
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31 | #if __GNUC__ |
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32 | # define NOTHROW |
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33 | # define THROW(x) |
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34 | #else |
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35 | # define NOTHROW throw() |
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36 | # define THROW(x) throw x |
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37 | #endif |
5 | |
38 | |
6 | extern class byteorder { |
39 | extern class byteorder { |
7 | static unsigned int e; // at least 32 bits |
40 | static unsigned int e; // at least 32 bits |
8 | public: |
41 | public: |
9 | byteorder (); |
42 | byteorder (); |
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12 | static bool network () { return e == 0x11223344; }; |
45 | static bool network () { return e == 0x11223344; }; |
13 | static bool little_endian () { return e == 0x44332211; }; |
46 | static bool little_endian () { return e == 0x44332211; }; |
14 | static bool vax () { return e == 0x44332211; }; |
47 | static bool vax () { return e == 0x44332211; }; |
15 | } byteorder; |
48 | } byteorder; |
16 | |
49 | |
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50 | // various utility functions |
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51 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
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52 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
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53 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
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54 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
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55 | |
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56 | 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; } |
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57 | 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; } |
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58 | |
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59 | 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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60 | |
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61 | template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); } |
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62 | |
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63 | // linear interpolation |
17 | template<typename T, typename U> |
64 | template<typename T, typename U, typename P> |
18 | static inline T min (T a, U b) { return a < b ? a : (T)b; } |
65 | static inline |
19 | template<typename T, typename U> |
66 | T lerp (T a, U b, P p) |
20 | static inline T max (T a, U b) { return a > b ? a : (T)b; } |
67 | { |
21 | template<typename T> |
68 | return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100; |
22 | static inline void swap (T& a, T& b) { T t=a; a=b; b=t; } |
69 | } |
23 | |
70 | |
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71 | // some bit functions, xft fuck me plenty |
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72 | #if HAVE_GCC_BUILTINS |
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73 | static inline int ctz (unsigned int x) CONST { return __builtin_ctz (x); } |
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74 | static inline int popcount (unsigned int x) CONST { return __builtin_popcount (x); } |
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75 | #else |
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76 | // count trailing zero bits and count # of one bits |
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77 | int ctz (unsigned int x) CONST; |
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78 | int popcount (unsigned int x) CONST; |
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79 | #endif |
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80 | |
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81 | // in range including end |
24 | #define IN_RANGE(val,beg,end) \ |
82 | #define IN_RANGE_INC(val,beg,end) \ |
25 | ((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)) |
26 | |
84 | |
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85 | // in range excluding end |
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86 | #define IN_RANGE_EXC(val,beg,end) \ |
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87 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
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88 | |
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89 | // makes dynamically allocated objects zero-initialised |
27 | struct zero_initialized { |
90 | struct zero_initialized { |
28 | void *operator new (size_t s); |
91 | void *operator new (size_t s); |
29 | void operator delete (void *p, size_t s); |
92 | void operator delete (void *p, size_t s); |
30 | }; |
93 | }; |
31 | |
94 | |
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241 | return pos; |
304 | return pos; |
242 | } |
305 | } |
243 | void erase (iterator first, iterator last) |
306 | void erase (iterator first, iterator last) |
244 | { |
307 | { |
245 | if (last != first) { |
308 | if (last != first) { |
246 | memmove (first, last, (end ()-last)*sizeof (T)); |
309 | memmove (first, last, (end () - last) * sizeof (T)); |
247 | _last -= last - first; |
310 | _last -= last - first; |
248 | } |
311 | } |
249 | } |
312 | } |
250 | void erase (iterator pos) |
313 | void erase (iterator pos) |
251 | { |
314 | { |
252 | if (pos != end ()) { |
315 | if (pos != end ()) { |
253 | memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); |
316 | memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T)); |
254 | --_last; |
317 | --_last; |
255 | } |
318 | } |
256 | } |
319 | } |
257 | void swap (simplevec<T> &t) |
320 | void swap (simplevec<T> &t) |
258 | { |
321 | { |
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376 | struct stringvec : simplevec<char *> |
439 | struct stringvec : simplevec<char *> |
377 | { |
440 | { |
378 | ~stringvec () |
441 | ~stringvec () |
379 | { |
442 | { |
380 | for (char **c = begin (); c != end (); c++) |
443 | for (char **c = begin (); c != end (); c++) |
381 | delete [] *c; |
444 | free (*c); |
382 | } |
445 | } |
383 | }; |
446 | }; |
384 | |
447 | |
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448 | // return a very temporary (and never deallocated) buffer. keep small. |
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449 | void *rxvt_temp_buf (int len); |
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450 | |
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451 | template<typename T> |
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452 | static inline T * |
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453 | rxvt_temp_buf (int len) |
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454 | { |
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455 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
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456 | } |
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457 | |
385 | #endif |
458 | #endif |
386 | |
459 | |