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 <cstdlib> |
5 | #include <cstring> |
5 | #include <cstring> |
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6 | #include <inttypes.h> |
6 | |
7 | |
7 | using namespace std; |
8 | using namespace std; |
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9 | |
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10 | #define ARRAY_LENGTH(v) (sizeof (v) / sizeof ((v)[0])) |
8 | |
11 | |
9 | #define PP_CONCAT_(a, b) a ## b |
12 | #define PP_CONCAT_(a, b) a ## b |
10 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
13 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
11 | #define PP_STRINGIFY_(a) #a |
14 | #define PP_STRINGIFY_(a) #a |
12 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
15 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
… | |
… | |
20 | # define rxvt_attribute(x) |
23 | # define rxvt_attribute(x) |
21 | # define expect(expr,value) (expr) |
24 | # define expect(expr,value) (expr) |
22 | #endif |
25 | #endif |
23 | |
26 | |
24 | // put into ifs if you are very sure that the expression |
27 | // put into ifs if you are very sure that the expression |
25 | // is mostly true or mosty false. note that these return |
28 | // is mostly true or mostly false. note that these return |
26 | // booleans, not the expression. |
29 | // booleans, not the expression. |
27 | #define expect_false(expr) expect ((expr) != 0, 0) |
30 | #define expect_false(expr) expect ((expr) != 0, 0) |
28 | #define expect_true(expr) expect ((expr) != 0, 1) |
31 | #define expect_true(expr) expect ((expr) != 0, 1) |
29 | |
32 | |
30 | #define NORETURN rxvt_attribute ((noreturn)) |
33 | #define NORETURN rxvt_attribute ((noreturn)) |
… | |
… | |
38 | #else |
41 | #else |
39 | # define NOTHROW throw() |
42 | # define NOTHROW throw() |
40 | # define THROW(x) throw x |
43 | # define THROW(x) throw x |
41 | #endif |
44 | #endif |
42 | |
45 | |
43 | extern class byteorder { |
46 | namespace byteorder { |
44 | static unsigned int e; // at least 32 bits |
47 | static unsigned char e () |
45 | public: |
48 | { |
46 | byteorder (); |
49 | const uint32_t u = 0x11223344; |
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50 | return *(unsigned char *)&u; |
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51 | } |
47 | |
52 | |
48 | static bool big_endian () { return e == 0x11223344; }; |
53 | static bool big_endian () { return e () == 0x11; }; |
49 | static bool network () { return e == 0x11223344; }; |
54 | static bool network () { return big_endian (); }; |
50 | static bool little_endian () { return e == 0x44332211; }; |
55 | static bool little_endian () { return e () == 0x44; }; |
51 | static bool vax () { return e == 0x44332211; }; |
56 | static bool vax () { return little_endian (); }; |
52 | } byteorder; |
57 | }; |
53 | |
58 | |
54 | // various utility functions |
59 | // various utility functions |
55 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
60 | 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; } |
61 | 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; } |
62 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
… | |
… | |
91 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
96 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
92 | } |
97 | } |
93 | |
98 | |
94 | // some bit functions, xft fuck me plenty |
99 | // some bit functions, xft fuck me plenty |
95 | #if HAVE_GCC_BUILTINS |
100 | #if HAVE_GCC_BUILTINS |
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101 | /* netbsd stupidly defines popcount itself and puts it into string.h */ |
96 | static inline int ctz (unsigned int x) { return __builtin_ctz (x); } |
102 | static inline int rxvt_ctz (unsigned int x) { return __builtin_ctz (x); } |
97 | static inline int popcount (unsigned int x) { return __builtin_popcount (x); } |
103 | static inline int rxvt_popcount (unsigned int x) { return __builtin_popcount (x); } |
98 | #else |
104 | #else |
99 | // count trailing zero bits and count # of one bits |
105 | // count trailing zero bits and count # of one bits |
100 | int ctz (unsigned int x) CONST; |
106 | int rxvt_ctz (unsigned int x) CONST; |
101 | int popcount (unsigned int x) CONST; |
107 | int rxvt_popcount (unsigned int x) CONST; |
102 | #endif |
108 | #endif |
103 | |
109 | |
104 | // in range including end |
110 | // in range including end |
105 | #define IN_RANGE_INC(val,beg,end) \ |
111 | #define IN_RANGE_INC(val,beg,end) \ |
106 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
112 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |