mirror of https://github.com/Llewellynvdm/fzf.git
74 lines
1.3 KiB
Go
74 lines
1.3 KiB
Go
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package fzf
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import "sync"
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const CHUNK_SIZE int = 100
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type Chunk []*Item // >>> []Item
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type Transformer func(*string, int) *Item
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type ChunkList struct {
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chunks []*Chunk
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count int
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mutex sync.Mutex
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trans Transformer
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}
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func NewChunkList(trans Transformer) *ChunkList {
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return &ChunkList{
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chunks: []*Chunk{},
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count: 0,
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mutex: sync.Mutex{},
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trans: trans}
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}
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func (c *Chunk) push(trans Transformer, data *string, index int) {
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*c = append(*c, trans(data, index))
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}
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func (c *Chunk) IsFull() bool {
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return len(*c) == CHUNK_SIZE
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}
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func (cl *ChunkList) lastChunk() *Chunk {
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return cl.chunks[len(cl.chunks)-1]
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}
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func CountItems(cs []*Chunk) int {
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if len(cs) == 0 {
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return 0
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}
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return CHUNK_SIZE*(len(cs)-1) + len(*(cs[len(cs)-1]))
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}
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func (cl *ChunkList) Count() int {
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return cl.count
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}
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func (cl *ChunkList) Chunks() []*Chunk {
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return cl.chunks
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}
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func (cl *ChunkList) Push(data string) {
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cl.mutex.Lock()
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defer cl.mutex.Unlock()
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if len(cl.chunks) == 0 || cl.lastChunk().IsFull() {
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newChunk := Chunk(make([]*Item, 0, CHUNK_SIZE))
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cl.chunks = append(cl.chunks, &newChunk)
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}
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cl.lastChunk().push(cl.trans, &data, cl.count)
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cl.count += 1
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}
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func (cl *ChunkList) Snapshot() []*Chunk {
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cl.mutex.Lock()
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defer cl.mutex.Unlock()
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ret := make([]*Chunk, len(cl.chunks))
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copy(ret, cl.chunks)
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return ret
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}
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