ADD file via upload

CSVReader.cpp

@@ -0,0 +1,58 @@
+#include "CSVReader.h"
+
+// 构造函数
+CSVReader::CSVReader(const string& filename) : filename(filename) {
+    file.open(filename);
+    if (!file.is_open()) {
+        cerr << "Error: Could not open file " << filename << endl;
+        exit(1);
+    }
+}
+
+// 析构函数
+CSVReader::~CSVReader() {
+    if (file.is_open()) {
+        file.close();
+    }
+}
+
+// 按行读取CSV文件
+vector<CSVRow> CSVReader::readByLine() {
+    vector<CSVRow> rows;
+    string line;
+    while (getline(file, line)) {
+        CSVRow row;
+        stringstream ss(line);
+        string cell;
+        while (getline(ss, cell, ',')) {
+            row.data.push_back(cell);
+        }
+        rows.push_back(row);
+    }
+    return rows;
+}
+
+// 按块读取CSV文件
+vector<CSVRow> CSVReader::readByBlock(int blockSize) {
+    vector<CSVRow> rows;
+    string line;
+    int count = 0;
+    while (getline(file, line) && count < blockSize) {
+        CSVRow row;
+        stringstream ss(line);
+        string cell;
+        while (getline(ss, cell, ',')) {
+            row.data.push_back(cell);
+        }
+        rows.push_back(row);
+        count++;
+    }
+    return rows;
+}
+
+// 按字节读取CSV文件
+string CSVReader::readByByte(int byteSize) {
+    vector<char> buffer(byteSize);
+    file.read(buffer.data(), byteSize);
+    return string(buffer.data(), byteSize);
+}