Move source files into folder

src/util.cpp

@@ -0,0 +1,55 @@
+#include <stdexcept>
+#include <sstream>
+
+#include "util.h"
+
+static std::string trim(const std::string &s)
+{
+	auto isspace = [] (char c) -> bool { return c == ' ' || c == '\t' || c == '\r' || c == '\n'; };
+
+	size_t front = 0;
+	while (isspace(s[front]))
+		++front;
+	size_t back = s.size() - 1;
+	while (back > front && isspace(s[back]))
+		--back;
+
+	return s.substr(front, back - front + 1);
+}
+
+std::string read_setting(const std::string &name, std::istream &is)
+{
+	char linebuf[512];
+	while (is.good()) {
+		is.getline(linebuf, sizeof(linebuf));
+
+		for (char *p = linebuf; *p; p++) {
+			if(*p != '#')
+				continue;
+			*p = '\0'; // Cut off at the first #
+			break;
+		}
+		std::string line(linebuf);
+
+		auto pos = line.find('=');
+		if (pos == std::string::npos)
+			continue;
+		auto key = trim(line.substr(0, pos));
+		if (key != name)
+			continue;
+		return trim(line.substr(pos+1));
+	}
+	std::ostringstream oss;
+	oss << "Setting '" << name << "' not found";
+	throw std::runtime_error(oss.str());
+}
+
+std::string read_setting_default(const std::string &name, std::istream &is,
+	const std::string &def)
+{
+	try {
+		return read_setting(name, is);
+	} catch(const std::runtime_error &e) {
+		return def;
+	}
+}