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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.12 by root, Wed Dec 21 10:34:24 2005 UTC vs.
Revision 1.16 by root, Wed Jan 11 00:59:58 2006 UTC

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>
5
6#define PP_CONCAT_(a, b) a ## b
7#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
8#define PP_STRINGIFY_(a) #a
9#define PP_STRINGIFY(a) PP_STRINGIFY_(a)
5 10
6extern class byteorder { 11extern class byteorder {
7 static unsigned int e; // at least 32 bits 12 static unsigned int e; // at least 32 bits
8public: 13public:
9 byteorder (); 14 byteorder ();
… …
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
17template<typename T, typename U> 22// various utility functions
18static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } 23template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
19template<typename T, typename U> 24template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
20static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } 25template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
21template<typename T, typename U, typename V> 26template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
27
22static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; } 28template<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; }
23template<typename T, typename U> 29template<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; }
30
24static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 31template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
25 32
26// in range including end 33// in range including end
27#define IN_RANGE_INC(val,beg,end) \ 34#define IN_RANGE_INC(val,beg,end) \
28 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 35 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
29 36
30// in range excluding end 37// in range excluding end
31#define IN_RANGE_EXC(val,beg,end) \ 38#define IN_RANGE_EXC(val,beg,end) \
32 ((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))
33 40
41// makes dynamically allocated objects zero-initialised
34struct zero_initialized { 42struct zero_initialized {
35 void *operator new (size_t s); 43 void *operator new (size_t s);
36 void operator delete (void *p, size_t s); 44 void operator delete (void *p, size_t s);
37}; 45};
38 46
… …
387 for (char **c = begin (); c != end (); c++) 395 for (char **c = begin (); c != end (); c++)
388 delete [] *c; 396 delete [] *c;
389 } 397 }
390}; 398};
391 399
400// temporarily replace the process environment
401extern char **environ;
402
403struct temp_environ
404{
405 char **prev;
406
407 temp_environ (const stringvec *envv)
408 : prev (environ)
409 {
410 if (envv)
411 environ = (char **)envv->begin ();
412 }
413
414 ~temp_environ ()
415 {
416 environ = prev;
417 }
418};
419
392#endif 420#endif
393 421

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