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9 | #define PP_STRINGIFY_(a) #a |
9 | #define PP_STRINGIFY_(a) #a |
10 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
10 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
11 | |
11 | |
12 | // actually, some gcc-3.x versions work, too |
12 | // actually, some gcc-3.x versions work, too |
13 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4) |
13 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4) |
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14 | |
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15 | #ifndef __attribute__ |
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16 | # if __GNUC__ |
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17 | # if (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || (__GNUC__ < 2) |
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18 | # define __attribute__(x) |
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19 | # endif |
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20 | # endif |
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21 | # define __attribute__(x) |
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22 | #endif |
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23 | |
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24 | #define NORETURN __attribute__ ((noreturn)) |
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25 | #define UNUSED __attribute__ ((unused)) |
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26 | #define CONST __attribute__ ((const)) |
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27 | |
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28 | // increases code size unless -fno-enforce-eh-specs |
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29 | #if __GNUC__ |
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30 | # define NOTHROW |
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31 | # define THROW(x) |
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32 | #else |
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33 | # define NOTHROW throw() |
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34 | # define THROW(x) throw x |
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35 | #endif |
14 | |
36 | |
15 | extern class byteorder { |
37 | extern class byteorder { |
16 | static unsigned int e; // at least 32 bits |
38 | static unsigned int e; // at least 32 bits |
17 | public: |
39 | public: |
18 | byteorder (); |
40 | byteorder (); |
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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; } |
54 | 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; } |
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; } |
55 | 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; } |
34 | |
56 | |
35 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
57 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
36 | |
58 | |
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59 | template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); } |
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60 | |
37 | // linear interpolation |
61 | // linear interpolation |
38 | template<typename T, typename U, typename P> |
62 | template<typename T, typename U, typename P> |
39 | static inline |
63 | static inline |
40 | T lerp (T a, U b, P p) |
64 | T lerp (T a, U b, P p) |
41 | { |
65 | { |
42 | return (int(a) * int(p) + int(b) * int(100 - p)) / 100; |
66 | return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100; |
43 | } |
67 | } |
44 | |
68 | |
45 | // some bit functions, xft fuck me plenty |
69 | // some bit functions, xft fuck me plenty |
46 | #if HAVE_GCC_BUILTINS |
70 | #if HAVE_GCC_BUILTINS |
47 | static inline int ctz (unsigned int x) { return __builtin_ctz (x); } |
71 | static inline int ctz (unsigned int x) CONST { return __builtin_ctz (x); } |
48 | static inline int popcount (unsigned int x) { return __builtin_popcount (x); } |
72 | static inline int popcount (unsigned int x) CONST { return __builtin_popcount (x); } |
49 | #else |
73 | #else |
50 | // count trailing zero bits and count # of one bits |
74 | // count trailing zero bits and count # of one bits |
51 | int ctz (unsigned int x); |
75 | int ctz (unsigned int x) CONST; |
52 | int popcount (unsigned int x); |
76 | int popcount (unsigned int x) CONST; |
53 | #endif |
77 | #endif |
54 | |
78 | |
55 | // in range including end |
79 | // in range including end |
56 | #define IN_RANGE_INC(val,beg,end) \ |
80 | #define IN_RANGE_INC(val,beg,end) \ |
57 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
81 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
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421 | |
445 | |
422 | // return a very temporary (and never deallocated) buffer. keep small. |
446 | // return a very temporary (and never deallocated) buffer. keep small. |
423 | void *rxvt_temp_buf (int len); |
447 | void *rxvt_temp_buf (int len); |
424 | |
448 | |
425 | template<typename T> |
449 | template<typename T> |
426 | inline T * |
450 | static inline T * |
427 | rxvt_temp_buf (int len) |
451 | rxvt_temp_buf (int len) |
428 | { |
452 | { |
429 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
453 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
430 | } |
454 | } |
431 | |
455 | |