Add libhv and test http client

vendor/libhv/include/hv/hstring.h

@@ -0,0 +1,80 @@
+#ifndef HV_STRING_H_
+#define HV_STRING_H_
+
+#include <string>
+#include <vector>
+
+#include <iostream>
+#include <sstream>
+
+#include "hexport.h"
+#include "hplatform.h"
+#include "hmap.h"
+
+#define SPACE_CHARS     " \t\r\n"
+#define PAIR_CHARS      "{}[]()<>\"\"\'\'``"
+
+namespace hv {
+
+HV_EXPORT extern std::string                        empty_string;
+HV_EXPORT extern std::map<std::string, std::string> empty_map;
+
+typedef std::vector<std::string> StringList;
+
+// std::map<std::string, std::string, StringCaseLess>
+class StringCaseLess : public std::less<std::string> {
+public:
+    bool operator()(const std::string& lhs, const std::string& rhs) const {
+        return strcasecmp(lhs.c_str(), rhs.c_str()) < 0;
+    }
+};
+
+// NOTE: low-version NDK not provide std::to_string
+template<typename T>
+HV_INLINE std::string to_string(const T& t) {
+    std::ostringstream oss;
+    oss << t;
+    return oss.str();
+}
+
+template<typename T>
+HV_INLINE T from_string(const std::string& str) {
+    T t;
+    std::istringstream iss(str);
+    iss >> t;
+    return t;
+}
+
+template<typename T>
+HV_INLINE void print(const T& t) {
+    std::cout << t;
+}
+
+template<typename T>
+HV_INLINE void println(const T& t) {
+    std::cout << t << std::endl;
+}
+
+HV_EXPORT std::string& toupper(std::string& str);
+HV_EXPORT std::string& tolower(std::string& str);
+HV_EXPORT std::string& reverse(std::string& str);
+
+HV_EXPORT bool startswith(const std::string& str, const std::string& start);
+HV_EXPORT bool endswith(const std::string& str, const std::string& end);
+HV_EXPORT bool contains(const std::string& str, const std::string& sub);
+
+HV_EXPORT std::string asprintf(const char* fmt, ...);
+// x,y,z
+HV_EXPORT StringList split(const std::string& str, char delim = ',');
+// k1=v1&k2=v2
+HV_EXPORT hv::KeyValue splitKV(const std::string& str, char kv_kv = '&', char k_v = '=');
+HV_EXPORT std::string trim(const std::string& str, const char* chars = SPACE_CHARS);
+HV_EXPORT std::string ltrim(const std::string& str, const char* chars = SPACE_CHARS);
+HV_EXPORT std::string rtrim(const std::string& str, const char* chars = SPACE_CHARS);
+HV_EXPORT std::string trim_pairs(const std::string& str, const char* pairs = PAIR_CHARS);
+HV_EXPORT std::string replace(const std::string& str, const std::string& find, const std::string& rep);
+HV_EXPORT std::string replaceAll(const std::string& str, const std::string& find, const std::string& rep);
+
+} // end namespace hv
+
+#endif // HV_STRING_H_