Logic complete

.gitignore

@@ -5,6 +5,9 @@
 *.so
 *.dylib
 
+main
+test
+
 # Test binary, built with `go test -c`
 *.test
 

pkg/wc/complex-counter.go

@@ -12,38 +12,48 @@ type ComplexCount struct {
 	MaxLineLength int64
 }
 
-func GetComplexCount(chunk []byte) ComplexCount {
+type ComplexChunk struct {
+	PrevRune rune
+	Chunk    []byte
+}
+
+func GetComplexCount(chunk ComplexChunk) ComplexCount {
 	var count = ComplexCount{}
-	word := false
 	var lineLength int64
-	runes := bytes.Runes(chunk)
+	runes := bytes.Runes(chunk.Chunk)
+	prevRuneIsSpace := unicode.IsSpace(chunk.PrevRune)
+	var linepos int64
 	for _, b := range runes {
 		count.CharCount++
+		if b == '\n' || b == '\r' || b == '\f' {
+			if linepos > lineLength {
+				lineLength = linepos
+			}
+			linepos = 0
 			if b == '\n' {
-			if lineLength > count.MaxLineLength {
-				count.MaxLineLength = lineLength
-			}
-			lineLength = 0
 				count.LineCount++
-			if word {
-				word = false
-				count.WordCount++
 			}
-		} else if unicode.IsSpace(b) {
-			lineLength++
-			if word {
-				word = false
-				count.WordCount++
 		}
+		if unicode.IsSpace(b) {
+			if b == '\t' {
+				linepos += 8 - (linepos % 8)
+			} else if b != '\n' && b != '\r' && b != '\f' && b != '\v' {
+				linepos++
+			}
+			prevRuneIsSpace = true
 		} else {
-			lineLength++
+			linepos++
-			word = true
+			if prevRuneIsSpace {
+				count.WordCount++
+			}
+			prevRuneIsSpace = false
 		}
 	}
+	count.MaxLineLength = lineLength
 	return count
 }
 
-func ConcurrentComplexChunkCounter(chunks <-chan []byte, counts chan<- ComplexCount) {
+func ConcurrentComplexChunkCounter(chunks <-chan ComplexChunk, counts chan<- ComplexCount) {
 	var totalCount ComplexCount
 	for chunk := range chunks {
 		count := GetComplexCount(chunk)

pkg/wc/counter.go

@@ -4,10 +4,10 @@ import (
 	"fmt"
 	"io"
 	"os"
-	"runtime"
+	"unicode/utf8"
 )
 
-const BufferSize = 1024 * 1024
+const BufferSize = 1024 * 1024 * 4
 
 type Counter struct {
 	Words         int64
@@ -35,7 +35,7 @@ func Count(filename string, cw, cc, cl, cb, mll bool) {
 	processLine := cw || cc
 
 	var c = &Counter{}
-	numWorkers := runtime.NumCPU()
+	numWorkers := 2 //runtime.NumCPU()
 
 	if cl && !processLine {
 		c.Lines = CountLines(file, numWorkers)
@@ -60,7 +60,7 @@ func Count(filename string, cw, cc, cl, cb, mll bool) {
 		fmt.Printf("%d ", c.Words)
 	}
 	if cc {
-		fmt.Printf("%d ", c.Words)
+		fmt.Printf("%d ", c.Chars)
 	}
 	if cb {
 		fmt.Printf("%d ", c.Bytes)
@@ -104,17 +104,18 @@ func CountLines(file *os.File, numWorkers int) int64 {
 func CountComplex(file *os.File, numWorkers int) *Counter {
 	counter := Counter{}
 
-	chunks := make(chan []byte, numWorkers)
+	chunks := make(chan ComplexChunk, numWorkers)
 	counts := make(chan ComplexCount, numWorkers)
 
 	for i := 0; i < numWorkers; i++ {
 		go ConcurrentComplexChunkCounter(chunks, counts)
 	}
-
+	var lastRune rune = ' ' // Fake the first char being a space so that the first word is counted
 	for {
 		buf := make([]byte, BufferSize)
 		count, err := file.Read(buf)
-		chunks <- buf[:count]
+		chunks <- ComplexChunk{lastRune, buf[:count]}
+		lastRune, _ = utf8.DecodeLastRune(buf[:count])
 		if err != nil {
 			if err == io.EOF {
 				break