usql update

usql/settings.cpp

@@ -0,0 +1,51 @@
+
+#include "settings.h"
+#include "exception.h"
+#include "ml_date.h"
+
+namespace usql {
+
+std::vector<std::pair<std::string, std::string>> Settings::m_settings =
+	    { std::make_pair("DATE_FORMAT", "%Y-%m-%d"),
+	      std::make_pair("BOOL_TRUE_LITERAL", "Y"),
+	      std::make_pair("BOOL_FALSE_LITERAL", "N"),
+	      std::make_pair("DOUBLE_FORMAT", "%.2f") };
+
+
+long Settings::string_to_date(const std::string &datestr) {
+	return ::string_to_date(datestr, get_setting("DATE_FORMAT"));
+}
+
+
+std::string Settings::date_to_string(long date) {
+	return ::date_to_string(date, get_setting("DATE_FORMAT"));
+}
+
+std::string Settings::double_to_string(double d) {
+	char buffer[32];
+	int r, buf_size = 32;
+
+	r = snprintf(buffer, buf_size, get_setting("DOUBLE_FORMAT").c_str(), d);
+	if (r > 0 && r < buf_size) return std::string(buffer);
+
+	return "ERROR";
+}
+
+std::string Settings::get_setting(const std::string &name) {
+	for(const auto& pair : m_settings) {
+		if (pair.first == name) return pair.second;
+	}
+	throw Exception("unsupported setting name: " + name);
+}
+
+void Settings::set_setting(const std::string &name, const std::string &value) {
+	for (auto it = begin(m_settings); it != end(m_settings); ++it) {
+		if (it->first == name)  {
+			*it = std::make_pair(name, value); 
+			return;
+		}
+	}	
+	throw Exception("unsupported setting name: " + name);
+}
+
+}	//  namespace