diff options
Diffstat (limited to 'src/heap.h')
-rw-r--r-- | src/heap.h | 40 |
1 files changed, 28 insertions, 12 deletions
@@ -24,7 +24,7 @@ namespace Bu | |||
24 | { | 24 | { |
25 | bool operator()( const item &a, const item &b ) | 25 | bool operator()( const item &a, const item &b ) |
26 | { | 26 | { |
27 | return a <= b; | 27 | return a < b; |
28 | } | 28 | } |
29 | }; | 29 | }; |
30 | 30 | ||
@@ -33,7 +33,7 @@ namespace Bu | |||
33 | { | 33 | { |
34 | bool operator()( const item &a, const item &b ) | 34 | bool operator()( const item &a, const item &b ) |
35 | { | 35 | { |
36 | return a >= b; | 36 | return a > b; |
37 | } | 37 | } |
38 | }; | 38 | }; |
39 | 39 | ||
@@ -42,7 +42,7 @@ namespace Bu | |||
42 | { | 42 | { |
43 | bool operator()( const item &a, const item &b ) | 43 | bool operator()( const item &a, const item &b ) |
44 | { | 44 | { |
45 | return *a <= *b; | 45 | return *a < *b; |
46 | } | 46 | } |
47 | }; | 47 | }; |
48 | 48 | ||
@@ -51,7 +51,7 @@ namespace Bu | |||
51 | { | 51 | { |
52 | bool operator()( const item &a, const item &b ) | 52 | bool operator()( const item &a, const item &b ) |
53 | { | 53 | { |
54 | return *a >= *b; | 54 | return *a > *b; |
55 | } | 55 | } |
56 | }; | 56 | }; |
57 | 57 | ||
@@ -74,7 +74,7 @@ namespace Bu | |||
74 | aItem = NULL; | 74 | aItem = NULL; |
75 | } | 75 | } |
76 | 76 | ||
77 | void push( item i ) | 77 | void enqueue( item i ) |
78 | { | 78 | { |
79 | if( iFill+1 >= iSize ) | 79 | if( iFill+1 >= iSize ) |
80 | upSize(); | 80 | upSize(); |
@@ -96,14 +96,17 @@ namespace Bu | |||
96 | } | 96 | } |
97 | } | 97 | } |
98 | ia.construct( &aItem[iFill], i ); | 98 | ia.construct( &aItem[iFill], i ); |
99 | for( int j = iFill; j >= 0; ) | 99 | if( iFill > 0 ) |
100 | { | 100 | { |
101 | int k = (j-1)/2; | 101 | for( int j = iFill; j >= 0; ) |
102 | if( cmp( aItem[k], aItem[j] ) ) | 102 | { |
103 | break; | 103 | int k = (j-1)/2; |
104 | if( cmp( aItem[k], aItem[j] ) ) | ||
105 | break; | ||
104 | 106 | ||
105 | swap( aItem[k], aItem[j] ); | 107 | swap( aItem[k], aItem[j] ); |
106 | j = k; | 108 | j = k; |
109 | } | ||
107 | } | 110 | } |
108 | iFill++; | 111 | iFill++; |
109 | } | 112 | } |
@@ -115,10 +118,11 @@ namespace Bu | |||
115 | return aItem[0]; | 118 | return aItem[0]; |
116 | } | 119 | } |
117 | 120 | ||
118 | void pop() | 121 | item dequeue() |
119 | { | 122 | { |
120 | if( iFill == 0 ) | 123 | if( iFill == 0 ) |
121 | throw HeapException("Heap empty."); | 124 | throw HeapException("Heap empty."); |
125 | item iRet = aItem[0]; | ||
122 | int j; | 126 | int j; |
123 | for( j = 0; j < iFill; ) | 127 | for( j = 0; j < iFill; ) |
124 | { | 128 | { |
@@ -138,6 +142,18 @@ namespace Bu | |||
138 | aItem[j] = aItem[iFill-1]; | 142 | aItem[j] = aItem[iFill-1]; |
139 | ia.destroy( &aItem[iFill-1] ); | 143 | ia.destroy( &aItem[iFill-1] ); |
140 | iFill--; | 144 | iFill--; |
145 | |||
146 | return iRet; | ||
147 | } | ||
148 | |||
149 | bool isEmpty() | ||
150 | { | ||
151 | return (iFill==0); | ||
152 | } | ||
153 | |||
154 | int getSize() | ||
155 | { | ||
156 | return iFill; | ||
141 | } | 157 | } |
142 | 158 | ||
143 | void print() | 159 | void print() |