working commit

stringaux.cpp

@@ -0,0 +1,39 @@
+#include <expected>
+#include <fstream>
+#include <iostream>
+#include <map>
+#include <string>
+#include <vector>
+#include <cstring>
+
+std::vector<std::string> split(std::string s, std::string delimiters) {
+        std::vector<std::string> tokens;
+        size_t last = 0, next = 0;
+        while ((next = s.find_first_of(delimiters, last)) != std::string::npos) {
+                if (next != last) tokens.push_back(s.substr(last, next - last));
+                last = next + 1;
+        }
+        if (last < s.length()) tokens.push_back(s.substr(last));
+        return tokens;
+}
+
+std::string trim(std::string& source) {
+        auto line = source;
+        std::string whitespaces(" \t\n\r\f\v");
+        line.erase(0, line.find_first_not_of(whitespaces));
+        line.erase(line.find_last_not_of(whitespaces) + 1);
+        return line;
+}
+
+std::expected<int, std::string> strtoint (std::string source) {
+        std::size_t pos{};
+        int res;
+        try {
+                res = std::stoi(source, &pos);
+        } catch (std::invalid_argument const& ex) {
+                return std::unexpected(std::format("invalid argument:{}",  ex.what()));
+        } catch (std::out_of_range const& ex) {
+                return std::unexpected(std::format("out of range", ex.what()));
+        }
+        return res;
+}