1 | #ifndef RXVT_UTIL_H |
1 | #ifndef RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
3 | |
3 | |
4 | #include <cstring> |
4 | #include <cstring> |
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5 | |
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6 | #define PP_CONCAT_(a, b) a ## b |
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7 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
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8 | #define PP_STRINGIFY_(a) #a |
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9 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
5 | |
10 | |
6 | extern class byteorder { |
11 | extern class byteorder { |
7 | static unsigned int e; // at least 32 bits |
12 | static unsigned int e; // at least 32 bits |
8 | public: |
13 | public: |
9 | byteorder (); |
14 | byteorder (); |
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12 | static bool network () { return e == 0x11223344; }; |
17 | static bool network () { return e == 0x11223344; }; |
13 | static bool little_endian () { return e == 0x44332211; }; |
18 | static bool little_endian () { return e == 0x44332211; }; |
14 | static bool vax () { return e == 0x44332211; }; |
19 | static bool vax () { return e == 0x44332211; }; |
15 | } byteorder; |
20 | } byteorder; |
16 | |
21 | |
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22 | // various utility functions |
17 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
23 | 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 void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
24 | 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 T max (T a, U b) { return a > (T)b ? a : (T)b; } |
25 | 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 void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
26 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
21 | |
27 | |
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30 | |
36 | |
31 | // in range excluding end |
37 | // in range excluding end |
32 | #define IN_RANGE_EXC(val,beg,end) \ |
38 | #define IN_RANGE_EXC(val,beg,end) \ |
33 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
39 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
34 | |
40 | |
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41 | // makes dynamically allocated objects zero-initialised |
35 | struct zero_initialized { |
42 | struct zero_initialized { |
36 | void *operator new (size_t s); |
43 | void *operator new (size_t s); |
37 | void operator delete (void *p, size_t s); |
44 | void operator delete (void *p, size_t s); |
38 | }; |
45 | }; |
39 | |
46 | |
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388 | for (char **c = begin (); c != end (); c++) |
395 | for (char **c = begin (); c != end (); c++) |
389 | delete [] *c; |
396 | delete [] *c; |
390 | } |
397 | } |
391 | }; |
398 | }; |
392 | |
399 | |
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400 | // temporarily replace the process environment |
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401 | extern char **environ; |
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402 | |
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403 | struct temp_environ |
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404 | { |
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405 | char **prev; |
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406 | |
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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 | |
393 | #endif |
420 | #endif |
394 | |
421 | |