1 files changed, 84 insertions, 0 deletions
diff --git a/src/diargs.cpp b/src/diargs.cpp
new file mode 100644
index 0000000..b7aa79e
--- /dev/null
+++ b/src/diargs.cpp
@@ -0,0 +1,84 @@
+/**
+ * diargs.cpp
+ * Copyright (c) 2022 Jon Santmyer <jon@jonsantmyer.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "diargs.hpp"
+#include <string_view>
+#include <list>
+
+namespace diargs
+{
+
+ArgumentParser::ArgumentParser(
+        void (*failfunc)(int), 
+        ArgumentList &arguments,
+        ArgsPair argcv)
+{
+    /*Raw c strings passed to string_view for safety*/
+    std::vector<std::string_view> argv(argcv.argc);
+    for(int arg = 0; arg < argcv.argc; arg++) {
+        argv[arg] = std::string_view(argcv.argv[arg]);
+    }
+
+    /*Skip the first argument because it will always be the path to the program*/
+    for(auto it = argv.begin() + 1; it != argv.end(); it++) {
+        if(it->at(0) == '-') { /*Argument could be shortform*/
+            if(it->at(1) == '-') { /*Argument is longform*/
+                std::string_view parsing = std::string_view(it->data() + 2);
+                if(parsing.size() == 0) continue;
+                for(auto &argdef : arguments.arguments) {
+                    if(argdef->longform != parsing) continue;
+                    auto newit = argdef->parse(argv, it);
+                    if(newit == std::nullopt) {
+                        failfunc(-1);
+                        return;
+                    }
+                    it = newit.value_or(argv.end());
+                    break;
+                }
+                continue;
+            }
+            std::string_view parsing = (*it);
+            for(char c : parsing) {
+                for(auto &argdef : arguments.arguments) {
+                    if(argdef->shortform != c) continue;
+                    auto newit = argdef->parse(argv, it);
+                    if(newit == std::nullopt) {
+                        failfunc(-1);
+                        return;
+                    }
+                    it = newit.value_or(argv.end());
+                }
+            }
+            continue;
+        } /*When argument is unmarked, it's an ordered type*/
+        for(auto argit = arguments.arguments.begin(); 
+                argit != arguments.arguments.end();
+                argit++) {
+            if((*argit)->shortform != 0 || !(*argit)->longform.empty()) continue;
+            it = (*argit)->parse(argv, it).value_or(argv.end());
+            arguments.arguments.erase(argit);
+            break;
+        }
+    }
+}
+
+}