| 1 | #ifndef RXVT_UTIL_H |
1 | #ifndef RXVT_UTIL_H |
| 2 | #define RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
| 3 | |
3 | |
| 4 | #include <cstdlib> |
4 | #include <stdlib.h> |
| 5 | #include <cstring> |
5 | #include <string.h> |
| 6 | |
6 | #include "ecb.h" |
| 7 | using namespace std; |
|
|
| 8 | |
|
|
| 9 | #define PP_CONCAT_(a, b) a ## b |
|
|
| 10 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
|
|
| 11 | #define PP_STRINGIFY_(a) #a |
|
|
| 12 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
|
|
| 13 | |
|
|
| 14 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4)) |
|
|
| 15 | |
|
|
| 16 | #if __GNUC__ >= 4 |
|
|
| 17 | # define rxvt_attribute(x) __attribute__(x) |
|
|
| 18 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
|
|
| 19 | #else |
|
|
| 20 | # define rxvt_attribute(x) |
|
|
| 21 | # define expect(expr,value) (expr) |
|
|
| 22 | #endif |
|
|
| 23 | |
|
|
| 24 | // put into ifs if you are very sure that the expression |
|
|
| 25 | // is mostly true or mosty false. note that these return |
|
|
| 26 | // booleans, not the expression. |
|
|
| 27 | #define expect_false(expr) expect ((expr) != 0, 0) |
|
|
| 28 | #define expect_true(expr) expect ((expr) != 0, 1) |
|
|
| 29 | |
|
|
| 30 | #define NORETURN rxvt_attribute ((noreturn)) |
|
|
| 31 | #define UNUSED rxvt_attribute ((unused)) |
|
|
| 32 | #define CONST rxvt_attribute ((const)) |
|
|
| 33 | |
7 | |
| 34 | // increases code size unless -fno-enforce-eh-specs |
8 | // increases code size unless -fno-enforce-eh-specs |
| 35 | #if __GNUC__ |
9 | #if __GNUC__ |
| 36 | # define NOTHROW |
10 | # define NOTHROW |
| 37 | # define THROW(x) |
11 | # define THROW(x) |
| 38 | #else |
12 | #else |
| 39 | # define NOTHROW throw() |
13 | # define NOTHROW throw() |
| 40 | # define THROW(x) throw x |
14 | # define THROW(x) throw x |
| 41 | #endif |
15 | #endif |
| 42 | |
16 | |
| 43 | extern class byteorder { |
|
|
| 44 | static unsigned int e; // at least 32 bits |
|
|
| 45 | public: |
|
|
| 46 | byteorder (); |
|
|
| 47 | |
|
|
| 48 | static bool big_endian () { return e == 0x11223344; }; |
|
|
| 49 | static bool network () { return e == 0x11223344; }; |
|
|
| 50 | static bool little_endian () { return e == 0x44332211; }; |
|
|
| 51 | static bool vax () { return e == 0x44332211; }; |
|
|
| 52 | } byteorder; |
|
|
| 53 | |
|
|
| 54 | // various utility functions |
17 | // various utility functions |
| 55 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
18 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
| 56 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
19 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
| 57 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
20 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
| 58 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
21 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
| … | |
… | |
| 88 | static inline T * |
51 | static inline T * |
| 89 | rxvt_temp_buf (int len) |
52 | rxvt_temp_buf (int len) |
| 90 | { |
53 | { |
| 91 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
54 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
| 92 | } |
55 | } |
| 93 | |
|
|
| 94 | // some bit functions, xft fuck me plenty |
|
|
| 95 | #if HAVE_GCC_BUILTINS |
|
|
| 96 | /* netbsd stupidly defines popcount itself and puts it into string.h */ |
|
|
| 97 | static inline int rxvt_ctz (unsigned int x) { return __builtin_ctz (x); } |
|
|
| 98 | static inline int rxvt_popcount (unsigned int x) { return __builtin_popcount (x); } |
|
|
| 99 | #else |
|
|
| 100 | // count trailing zero bits and count # of one bits |
|
|
| 101 | int rxvt_ctz (unsigned int x) CONST; |
|
|
| 102 | int rxvt_popcount (unsigned int x) CONST; |
|
|
| 103 | #endif |
|
|
| 104 | |
56 | |
| 105 | // in range including end |
57 | // in range including end |
| 106 | #define IN_RANGE_INC(val,beg,end) \ |
58 | #define IN_RANGE_INC(val,beg,end) \ |
| 107 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
59 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
| 108 | |
60 | |
