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authorMike Buland <eichlan@xagasoft.com>2009-08-09 05:30:34 +0000
committerMike Buland <eichlan@xagasoft.com>2009-08-09 05:30:34 +0000
commit4e86c50016ecfea40a72930cdd0460143f9edf4a (patch)
treee13c153b8042752a64134b3565e0e87a61d51398 /src/util.h
parent9e48c6f7d602364eb1c18de7e1e4c00e4852839c (diff)
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Really, just a lot of documenting.
Diffstat (limited to 'src/util.h')
-rw-r--r--src/util.h68
1 files changed, 65 insertions, 3 deletions
diff --git a/src/util.h b/src/util.h
index efbfb26..ea107ee 100644
--- a/src/util.h
+++ b/src/util.h
@@ -19,6 +19,12 @@
19 19
20namespace Bu 20namespace Bu
21{ 21{
22 /**
23 * Swap the value of two variables, uses references, so it's pretty safe.
24 * Objects passed in must support a basic assignemnt operator (=);
25 *@param a Variable to recieve the value of parameter b
26 *@param b Variable to recieve the value of parameter a
27 */
22 template<typename item> 28 template<typename item>
23 void swap( item &a, item &b ) 29 void swap( item &a, item &b )
24 { 30 {
@@ -27,36 +33,78 @@ namespace Bu
27 b = tmp; 33 b = tmp;
28 } 34 }
29 35
36 /**
37 * Finds the lesser of the two objects, objects passed in must be
38 * less-than-comparable.
39 *@param a A value to test.
40 *@param b Another value to test.
41 *@returns A reference to the lesser of a or b.
42 */
30 template<typename item> 43 template<typename item>
31 const item &min( const item &a, const item &b ) 44 const item &min( const item &a, const item &b )
32 { 45 {
33 return a<b?a:b; 46 return a<b?a:b;
34 } 47 }
35 48
49 /**
50 * Finds the lesser of the two objects, objects passed in must be
51 * less-than-comparable.
52 *@param a A value to test.
53 *@param b Another value to test.
54 *@returns A reference to the lesser of a or b.
55 */
36 template<typename item> 56 template<typename item>
37 item &min( item &a, item &b ) 57 item &min( item &a, item &b )
38 { 58 {
39 return a<b?a:b; 59 return a<b?a:b;
40 } 60 }
41 61
62 /**
63 * Finds the greater of the two objects, objects passed in must be
64 * less-than-comparable.
65 *@param a A value to test.
66 *@param b Another value to test.
67 *@returns A reference to the greater of a or b.
68 */
42 template<typename item> 69 template<typename item>
43 const item &max( const item &a, const item &b ) 70 const item &max( const item &a, const item &b )
44 { 71 {
45 return a>b?a:b; 72 return b<a?a:b;
46 } 73 }
47 74
75 /**
76 * Finds the greater of the two objects, objects passed in must be
77 * less-than-comparable.
78 *@param a A value to test.
79 *@param b Another value to test.
80 *@returns A reference to the greater of a or b.
81 */
48 template<typename item> 82 template<typename item>
49 item &max( item &a, item &b ) 83 item &max( item &a, item &b )
50 { 84 {
51 return a>b?a:b; 85 return b<a?a:b;
52 } 86 }
53 87
88 /**
89 * Given three objects this finds the one between the other two.
90 *@param a A value to test.
91 *@param b Another value to test.
92 *@param c Yet another value to test.
93 *@returns A reference to the mid-value of a, b, and c.
94 */
54 template<typename item> 95 template<typename item>
55 const item &mid( const item &a, const item &b, const item &c ) 96 const item &mid( const item &a, const item &b, const item &c )
56 { 97 {
57 return min( max( a, b ), c ); 98 return min( max( a, b ), c );
58 } 99 }
59 100
101 /**
102 * Given three objects this finds the one between the other two.
103 *@param a A value to test.
104 *@param b Another value to test.
105 *@param c Yet another value to test.
106 *@returns A reference to the mid-value of a, b, and c.
107 */
60 template<typename item> 108 template<typename item>
61 item &mid( item &a, item &b, item &c ) 109 item &mid( item &a, item &b, item &c )
62 { 110 {
@@ -66,6 +114,10 @@ namespace Bu
66 // 114 //
67 // Basic comparison functors 115 // Basic comparison functors
68 // 116 //
117 /**
118 * Simple less-than comparison functor. Objects being used should be
119 * less-than-comparable.
120 */
69 template<typename item> 121 template<typename item>
70 struct __basicLTCmp 122 struct __basicLTCmp
71 { 123 {
@@ -75,6 +127,10 @@ namespace Bu
75 } 127 }
76 }; 128 };
77 129
130 /**
131 * Simple greater-than comparison functor. Objects being used should be
132 * greater-than-comparable.
133 */
78 template<typename item> 134 template<typename item>
79 struct __basicGTCmp 135 struct __basicGTCmp
80 { 136 {
@@ -84,6 +140,9 @@ namespace Bu
84 } 140 }
85 }; 141 };
86 142
143 /**
144 * As __basicLTCmp but dereferences the passed in pointers before comparing.
145 */
87 template<typename item> 146 template<typename item>
88 struct __basicPtrLTCmp 147 struct __basicPtrLTCmp
89 { 148 {
@@ -93,6 +152,9 @@ namespace Bu
93 } 152 }
94 }; 153 };
95 154
155 /**
156 * As __basicGTCmp but dereferences the passed in pointers before comparing.
157 */
96 template<typename item> 158 template<typename item>
97 struct __basicPtrGTCmp 159 struct __basicPtrGTCmp
98 { 160 {