1 #ifndef RXVT_UTIL_H
2 #define RXVT_UTIL_H
3
4 #include <stdlib.h>
5 #include <string.h>
6
7 #define ECB_NO_THREADS 1
8 #include "ecb.h"
9
10 #include "estl.h"
11
12 #include "emman.h"
13
14 // various utility functions
min_it(T & a,U b)15 template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
max_it(T & a,U b)16 template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
17
clamp(T v,U a,V b)18 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; }
clamp_it(T & v,U a,V b)19 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; }
20
21 // linear interpolation
22 template<typename T, typename U, typename P>
23 static inline T
lerp(T a,U b,P p)24 lerp (T a, U b, P p)
25 {
26 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
27 }
28
29 // return a very temporary (and never deallocated) buffer. keep small.
30 void *rxvt_temp_buf (int len);
31
32 template<typename T>
33 static inline T *
rxvt_temp_buf(int len)34 rxvt_temp_buf (int len)
35 {
36 return (T *)rxvt_temp_buf (len * sizeof (T));
37 }
38
39 // in range including end
40 #define IN_RANGE_INC(val,beg,end) \
41 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
42
43 // in range excluding end
44 #define IN_RANGE_EXC(val,beg,end) \
45 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
46
47 // for m >= -n, ensure remainder lies between 0..n-1
48 #define MOD(m,n) (((m) + (n)) % (n))
49
50 // makes dynamically allocated objects zero-initialised
51 struct zero_initialized
52 {
53 void *operator new (size_t s);
54 void operator delete (void *p, size_t s);
55 };
56
57 struct stringvec : simplevec<char *>
58 {
~stringvecstringvec59 ~stringvec ()
60 {
61 for (char **c = begin (); c != end (); c++)
62 free (*c);
63 }
64 };
65
66 #if 0
67 template<typename T>
68 struct rxvt_vec : simplevec<void *>
69 {
70 typedef T *iterator;
71
72 void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
73 T pop_back () { return (T*)simplevec<void *>::pop_back (); }
74 void erase (int i) { erase (begin () + i); }
75 void erase (iterator i) { simplevec<void *>::erase ((void **)i); }
76 iterator begin () const { return (iterator)simplevec<void *>::begin (); }
77 iterator end () const { return (iterator)simplevec<void *>::end (); }
78 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
79 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
80 };
81 #endif
82
83 typedef estl::scoped_array<char> auto_str;
84
85 #endif
86
87