添加字符集转换方法

src/iflytop/components/ziconv.cpp

@@ -0,0 +1,42 @@
+#include "utf8_to_gb2312.hpp"
+
+#include <iconv.h>
+
+using namespace iflytop;
+
+string ZIconv::utf8_to_gb2312(const std::string& utf8_str) {
+  // 打开转换描述符
+  iconv_t cd = iconv_open("GB2312", "UTF-8");
+  if (cd == (iconv_t)-1) {
+    perror("iconv_open failed");
+    exit(EXIT_FAILURE);
+  }
+
+  // 输入字符串
+  const char* in_str  = utf8_str.c_str();
+  size_t      in_size = utf8_str.size();
+
+  // 输出缓冲区
+  size_t out_size = in_size * 2;  // 假设输出的字节数不会超过输入的两倍
+  char*  out_buf  = new char[out_size];
+  char*  out_str  = out_buf;
+
+  // 进行转换
+  if (iconv(cd, const_cast<char**>(&in_str), &in_size, &out_str, &out_size) == (size_t)-1) {
+    perror("iconv failed");
+    iconv_close(cd);
+    delete[] out_buf;
+    exit(EXIT_FAILURE);
+  }
+
+  // 关闭转换描述符
+  iconv_close(cd);
+
+  // 获取转换后的字符串
+  std::string gb2312_str(out_buf, out_str - out_buf);
+
+  // 释放内存
+  delete[] out_buf;
+
+  return gb2312_str;
+}

src/iflytop/components/ziconv.hpp

@@ -0,0 +1,22 @@
+#pragma once
+#include <fstream>
+#include <functional>
+#include <iostream>
+#include <list>
+#include <map>
+#include <memory>
+#include <set>
+#include <sstream>
+#include <string>
+#include <vector>
+namespace iflytop {
+using namespace std;
+
+class ZIconv {
+ private:
+  /* data */
+ public:
+  static string utf8_to_gb2312(const string& utf8_str);
+};
+
+}  // namespace iflytop