(linePtr *LinePtr, offset int)
| 128 | } |
| 129 | |
| 130 | func (lv *LogView) Move(linePtr *LinePtr, offset int) (int, *LinePtr, error) { |
| 131 | var n int |
| 132 | if offset > 0 { |
| 133 | for { |
| 134 | nextLinePtr, err := lv.NextLinePtr(linePtr) |
| 135 | if err == io.EOF { |
| 136 | break |
| 137 | } |
| 138 | if err != nil { |
| 139 | return 0, nil, err |
| 140 | } |
| 141 | linePtr = nextLinePtr |
| 142 | n++ |
| 143 | if n == offset { |
| 144 | break |
| 145 | } |
| 146 | } |
| 147 | return n, linePtr, nil |
| 148 | } |
| 149 | if offset < 0 { |
| 150 | for { |
| 151 | prevLinePtr, err := lv.PrevLinePtr(linePtr) |
| 152 | if err == ErrBOF { |
| 153 | break |
| 154 | } |
| 155 | if err != nil { |
| 156 | return 0, nil, err |
| 157 | } |
| 158 | linePtr = prevLinePtr |
| 159 | n-- |
| 160 | if n == offset { |
| 161 | break |
| 162 | } |
| 163 | } |
| 164 | return n, linePtr, nil |
| 165 | } |
| 166 | return 0, linePtr, nil |
| 167 | } |
| 168 | |
| 169 | func (lv *LogView) LastLinePtr(linePtr *LinePtr) (*LinePtr, error) { |
| 170 | if linePtr == nil { |
nothing calls this directly
no test coverage detected