From f54243a46587de5b53ea60a17b70aef4f74e02f5 Mon Sep 17 00:00:00 2001
From: aozhiwei <azw@aozhiweis-MacBook-Pro.local>
Date: Fri, 28 Aug 2020 23:27:02 +0800
Subject: [PATCH] 1

---
 csvreader.go | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

diff --git a/csvreader.go b/csvreader.go
index fb47663..1eac367 100644
--- a/csvreader.go
+++ b/csvreader.go
@@ -1,24 +1,44 @@
 package q5
 
-import "ioutil"
+import "io"
+import "os"
+import "bufio"
 
 type CsvReader struct {
 	columns map[string]int32
 	values []XValue
 
-	currLine int32
+	currLine int
+	lines []string
 }
 
 func (this *CsvReader) Load(fileName string) bool {
-	f, err := ioutil.ReadFile(fileName)
+	this.columns = map[string]int32{}
+	this.values = []XValue{}
+	this.currLine = 0
+	this.lines = []string{}
+
+	f, err := os.Open(fileName)
 	if err == nil {
 		defer f.Close()
 
+		br := bufio.NewReader(f)
+		for {
+			line, _, c := br.ReadLine()
+			if c == io.EOF {
+				break
+			}
+			this.lines = append(this.lines, string(line))
+		}
 	}
 	return err == nil
 }
 
 func (this *CsvReader) NextLine() bool {
+	if this.currLine >= len(this.lines) {
+		return false
+	}
+	this.currLine++
 	return true
 }