hey

errors.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+    "strings"
+)
+
+const (
+	E_Ok int = iota
+	E_No_Data
+)
+
+type errorGroup []error
+
+func (e errorGroup) Error() string {
+    messages := make([]string, 0, len(e))
+    for i, _ := range e {
+        messages[i] = e[i].Error()
+    }
+    return strings.Join(messages, " && ")
+}
+
+func (g *errorGroup) AddError(err error) {
+    if err == nil {
+        return
+    }
+    if g == nil {
+        panic("fart")
+        *g = make([]error, 0, 4)
+    }
+    *g = append(*g, err)
+}

main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+    "fmt"
+    "os"
+)
+
+var dataPath = "/projects/exo/expl.speck"
+
+func log_error(template string, args ...interface{}) {
+    fmt.Fprint(os.Stderr, "ERROR ")
+    fmt.Fprintf(os.Stderr, template+"\n", args...)
+}
+
+func log_info(template string, args ...interface{}) {
+    fmt.Fprint(os.Stdout, "INFO ")
+    fmt.Fprintf(os.Stdout, template+"\n", args...)
+}
+
+func bail(status int, template string, args ...interface{}) {
+    if status == 0 {
+        fmt.Fprintf(os.Stdout, template, args...)
+    } else {
+        fmt.Fprintf(os.Stderr, template, args...)
+    }
+    os.Exit(status)
+}
+
+func main() {
+    fi, err := os.Open(dataPath)
+    if err != nil {
+        bail(E_No_Data, "unable to open data path: %v", err)
+    }
+    speckStream(fi)
+}

speck.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+func speckStream(r io.ReadCloser) {
+	defer r.Close()
+	keep := regexp.MustCompile(`^\s*[\d-]`)
+
+	br := bufio.NewReader(r)
+	for {
+		line, err := br.ReadBytes('\n')
+		switch err {
+		case io.EOF:
+			return
+		case nil:
+			break
+		default:
+			log_error("unable to stream speck file: %v", err)
+			return
+		}
+		if !keep.Match(line) {
+			continue
+		}
+		parseSpeckLine(line)
+	}
+}
+
+type exoSystem struct {
+	x, y, z float64
+	planets int
+	name    string
+}
+
+func (e exoSystem) String() string {
+    return fmt.Sprintf("<name: %s x: %v y: %v z: %v planets: %v>", e.name, e.x, e.y, e.z, e.planets)
+}
+
+func parseSpeckLine(line []byte) {
+	parts := strings.Split(string(line), " ")
+	var err error
+	var g errorGroup
+	s := new(exoSystem)
+
+	s.x, err = strconv.ParseFloat(parts[0], 64)
+	g.AddError(err)
+	s.y, err = strconv.ParseFloat(parts[1], 64)
+	g.AddError(err)
+	s.z, err = strconv.ParseFloat(parts[2], 64)
+	g.AddError(err)
+	s.planets, err = strconv.Atoi(parts[3])
+	g.AddError(err)
+
+    s.name = strings.TrimSpace(strings.Join(parts[7:], " "))
+
+	if g != nil {
+		log_error("%v", g)
+	}
+	log_info("%v", s)
+}