2 files changed, 127 insertions, 0 deletions
diff --git a/src/pgnp.cpp b/src/pgnp.cpp
new file mode 100644
index 0000000..391e6ee
--- /dev/null
+++ b/src/pgnp.cpp
@@ -0,0 +1,81 @@
+
+#include "pgnp.hpp"
+#include <iostream>
+
+#define IS_BLANK(c) (c==' ' || c=='\n' || c=='\t')
+#define IS_EOF(loc) (loc>=pgn_content.size())
+#define EOF_CHECK(loc) {if(IS_EOF(loc)) throw UnexpectedEOF();}
+
+namespace pgnp {
+
+  void PGN::FromFile(std::string filepath){
+    std::ifstream file(filepath);
+    
+    std::string content((std::istreambuf_iterator<char>(file)),
+                    std::istreambuf_iterator<char>());
+    FromString(content);
+  }
+
+
+  void PGN::FromString(std::string pgn_content){
+    this->pgn_content=pgn_content;
+    int loc=0;
+    while(!IS_EOF(loc)) {
+      char c=pgn_content[loc];
+      if(!IS_BLANK(c)){
+        switch (c) {
+          case '[':
+            loc=ParseNextTag(loc);
+            break;
+        }
+      }
+      loc++;
+    }
+
+    /*for (auto const& [key, val] : tags){
+      std::cout << key <<"="<<val<<std::endl;
+    }*/
+  }
+
+  int PGN::ParseNextTag(int start_loc){
+    // Parse key
+    std::string key;
+    int keyloc=start_loc+1;
+    EOF_CHECK(keyloc);
+    char c=pgn_content[keyloc];
+    while(!IS_BLANK(c)){
+      key+=c;
+      keyloc++;
+      EOF_CHECK(keyloc);
+      c=pgn_content[keyloc];
+    }
+
+    // Parse value
+    std::string value;
+    int valueloc=NextNonBlank(keyloc)+1;
+    EOF_CHECK(keyloc);
+    c=pgn_content[valueloc];
+    while(c!='"' or IS_EOF(valueloc)){
+      value+=c;
+      valueloc++;
+      EOF_CHECK(keyloc);
+      c=pgn_content[valueloc];
+    }
+
+    // Add tag
+    tags[key]=value;
+
+ 
+    return(valueloc+1); // +1 For the last char of the tag which is ']'
+  }
+
+  int PGN::NextNonBlank(int loc){
+    char c=pgn_content[loc];
+    while(IS_BLANK(c)){
+      loc++;
+      c=pgn_content[loc];
+    }
+    return(loc);
+  }
+
+}
+\ No newline at end of file
diff --git a/src/pgnp.hpp b/src/pgnp.hpp
new file mode 100644
index 0000000..25e74c8
--- /dev/null
+++ b/src/pgnp.hpp
@@ -0,0 +1,46 @@
+#include <unordered_map>
+#include <string>
+#include <fstream>
+#include <streambuf>
+#include <iostream>
+#include <exception>
+
+namespace pgnp {
+
+
+    typedef struct HalfMove {
+
+    } HalfMove;
+
+
+    class PGN {
+        private:
+        std::unordered_map<std::string,std::string> tags;
+        HalfMove moves;
+        std::string pgn_content;
+
+        public:
+        void FromFile(std::string);
+        void FromString(std::string);
+
+
+        private:
+
+        /// @brief Populate @a tags with by parsing the one starting at location in argument
+        int ParseNextTag(int);
+        
+        /// @brief Get the next non-blank char location starting from location in argument
+        int NextNonBlank(int);
+    };
+
+
+
+    struct UnexpectedEOF : public std::exception
+    {
+        const char * what () const throw ()
+        {
+            return "Unexpected end of pgn file";
+        }
+    };
+
+}