From 5e8520cd5d3042e41db7613a4a189c76f8574fb8 Mon Sep 17 00:00:00 2001
From: name5566 <name5566@gmail.com>
Date: Tue, 5 Aug 2014 23:27:07 +0800
Subject: [PATCH] implement simple recordfile

---
 recordfile/recordfile.go | 93 +++++++++++++++++++++++++++++++---------
 1 file changed, 73 insertions(+), 20 deletions(-)

diff --git a/recordfile/recordfile.go b/recordfile/recordfile.go
index 48b56673..406f41fc 100644
--- a/recordfile/recordfile.go
+++ b/recordfile/recordfile.go
@@ -6,18 +6,18 @@ import (
 	"fmt"
 	"os"
 	"reflect"
+	"strconv"
 )
 
-const (
-	defComma   = ','
-	defComment = '#'
-)
+var Comma rune = ','
+var Comment rune = '#'
 
 type RecordFile struct {
 	Comma      rune
 	Comment    rune
 	kindFields []reflect.Kind
 	tagFields  []reflect.StructTag
+	typeRecord reflect.Type
 	records    []interface{}
 	indexes    [](map[interface{}]interface{})
 }
@@ -31,11 +31,11 @@ func New(st interface{}) (*RecordFile, error) {
 	rf := new(RecordFile)
 	rf.kindFields = make([]reflect.Kind, t.NumField())
 	rf.tagFields = make([]reflect.StructTag, t.NumField())
+	rf.typeRecord = t
 
 	for i := 0; i < t.NumField(); i++ {
 		f := t.Field(i)
 
-		// kind
 		k := f.Type.Kind()
 		if k == reflect.Bool ||
 			k == reflect.Int8 ||
@@ -43,6 +43,7 @@ func New(st interface{}) (*RecordFile, error) {
 			k == reflect.Int32 ||
 			k == reflect.Int64 ||
 			k == reflect.Uint8 ||
+			k == reflect.Uint16 ||
 			k == reflect.Uint32 ||
 			k == reflect.Uint64 ||
 			k == reflect.Float32 ||
@@ -53,7 +54,6 @@ func New(st interface{}) (*RecordFile, error) {
 			return nil, errors.New("invalid type: " + k.String())
 		}
 
-		// tag
 		tag := f.Tag
 		if tag == "" ||
 			tag == "index" {
@@ -74,10 +74,10 @@ func (rf *RecordFile) Read(name string) error {
 	defer f.Close()
 
 	if rf.Comma == 0 {
-		rf.Comma = defComma
+		rf.Comma = Comma
 	}
 	if rf.Comment == 0 {
-		rf.Comment = defComment
+		rf.Comment = Comment
 	}
 
 	reader := csv.NewReader(f)
@@ -88,22 +88,75 @@ func (rf *RecordFile) Read(name string) error {
 		return err
 	}
 
-	for n, line := range lines {
-		// kind
-		if n == 0 {
-			for i, k := range rf.kindFields {
-				fmt.Println(i, k)
-				fmt.Println(line[i])
-			}
-		}
+	records := make([]interface{}, len(lines)-1)
+	for n := 1; n < len(lines); n++ {
+		v := reflect.New(rf.typeRecord)
+		records[n-1] = v.Interface()
+		record := v.Elem()
 
-		// desc
-		if n == 1 {
-			continue
+		line := lines[n]
+		if len(line) != len(rf.kindFields) {
+			return errors.New(fmt.Sprintf("line %v, field count mismatch: %v %v",
+				n, len(line), len(rf.kindFields)))
 		}
 
-		// data
+		for i, k := range rf.kindFields {
+			fieldStr := line[i]
+			field := record.Field(i)
+
+			var err error
+
+			if k == reflect.Bool {
+				var v bool
+				v, err = strconv.ParseBool(fieldStr)
+				if err == nil {
+					field.SetBool(v)
+				}
+			} else if k == reflect.Int8 ||
+				k == reflect.Int16 ||
+				k == reflect.Int32 ||
+				k == reflect.Int64 {
+				var v int64
+				v, err = strconv.ParseInt(fieldStr, 0, field.Type().Bits())
+				if err == nil {
+					field.SetInt(v)
+				}
+			} else if k == reflect.Uint8 ||
+				k == reflect.Uint16 ||
+				k == reflect.Uint32 ||
+				k == reflect.Uint64 {
+				var v uint64
+				v, err = strconv.ParseUint(fieldStr, 0, field.Type().Bits())
+				if err == nil {
+					field.SetUint(v)
+				}
+			} else if k == reflect.Float32 ||
+				k == reflect.Float64 {
+				var v float64
+				v, err = strconv.ParseFloat(fieldStr, field.Type().Bits())
+				if err == nil {
+					field.SetFloat(v)
+				}
+			} else if k == reflect.String {
+				field.SetString(fieldStr)
+			}
+
+			if err != nil {
+				return errors.New(fmt.Sprintf("parse field (row=%v, col=%v) error: %v",
+					n, i, err))
+			}
+		}
 	}
 
+	rf.records = records
+
 	return nil
 }
+
+func (rf *RecordFile) Record(i int) interface{} {
+	return rf.records[i]
+}
+
+func (rf *RecordFile) NumRecord() int {
+	return len(rf.records)
+}