better option sys

1 files changed, 52 insertions, 0 deletions

diff --git a/src/util/option_parse.cc b/src/util/option_parse.cc
new file mode 100644
index 0000000..f9185fb
--- /dev/null
+++ b/src/util/option_parse.cc
@@ -0,0 +1,52 @@
+#include "util/option_parse.h"
+
+#include <iostream>
+#include <string>
+#include <vector>
+#include <unordered_map>
+#include <functional>
+#include <utility>
+
+#include "all.h"
+
+using namespace std;
+
+const char option_key_value_split = '=';
+constexpr char option_prefix = '-';
+
+namespace ov4
+{
+
+void exe_option(char **c_argv)
+{
+    vector<string> argv;
+    argv2string(&argv, c_argv);
+
+    for (auto c : argv)
+    {
+        pair<string, string> key_value = option_split(c);
+        if (key_value.first != "")
+        {
+            if (option_list.find(key_value.first) == option_list.end())
+            {
+                cerr << key_value.first << ": option not fund" << endl;
+                continue;
+            }
+            option_list.at(key_value.first)(key_value.second);
+        }
+    }
+}
+
+pair<string, string> option_split(string s)
+{
+    if (s.size() == 0) return make_pair("", "");
+    if (s[0] != option_prefix) return make_pair("", "");
+    size_t pos = s.find(option_key_value_split);
+    if (pos == string::npos) return make_pair(s, "");
+    if (pos == s.size()+1) return make_pair(s.substr(0, pos), "");
+    string key = s.substr(0, pos);
+    string value = s.substr(pos+1);
+    return make_pair(key, value);
+}
+
+}