From ef75681956ae842cbf1b2b357374aa34e3361448 Mon Sep 17 00:00:00 2001
From: Loic Guegan <manzerbredes@mailbox.org>
Date: Thu, 5 Jan 2023 17:15:19 +0100
Subject: Add GotoNextGame() function to skip an entire game

---
 src/PGN.cpp | 40 ++++++++++++++++++++++++++++++++++++++++
 src/PGN.hpp |  2 ++
 2 files changed, 42 insertions(+)

(limited to 'src')

diff --git a/src/PGN.cpp b/src/PGN.cpp
index bfe58fe..96346e8 100644
--- a/src/PGN.cpp
+++ b/src/PGN.cpp
@@ -45,6 +45,46 @@ void PGN::FromString(std::string pgn_content) {
   this->pgn_content.FromString(pgn_content);
 }
 
+void PGN::GotoNextGame(){
+  // Search for new game
+  if (IS_EOF) {
+    throw NoGameFound();
+  }
+  loctype loc = GotoNextToken(LastGameEndLoc);
+  if (IS_EOF) {
+    throw NoGameFound();
+  }
+  // First skip current game tags
+  while (!IS_EOF) {
+    char c = pgn_content[loc];
+    if (!IS_BLANK(c)) {
+      if (c == '[') {
+        loc = ParseNextTag(loc); // Here we are at ']' after the call to ParseNextTag
+      } else
+        break;
+    }
+    loc++;
+  }
+  // Goto next game '[' by skipping the entire game
+  while (!IS_EOF) {
+    char c = pgn_content[loc];
+    if (!IS_BLANK(c)) {
+      if (c == '[') {
+        LastGameEndLoc=loc;
+        return;
+      } else if(c== '{'){
+        // We skip the comments as they can contains '['
+        while(!IS_EOF && c != '}'){
+          loc++;
+          c = pgn_content[loc];
+        }
+      }
+    }
+    loc++;
+  }
+  throw NoGameFound();
+}
+
 void PGN::ParseNextGame() {
   // Clean previous parse
   if (moves != NULL) {
diff --git a/src/PGN.hpp b/src/PGN.hpp
index 15629af..d313f91 100644
--- a/src/PGN.hpp
+++ b/src/PGN.hpp
@@ -37,6 +37,8 @@ public:
    * last parsed game data. Be careful.
    */
   void ParseNextGame();
+  /// @brief Goto the next game while avoiding to parse entire game moves
+  void GotoNextGame();
   /// @brief Check if PGN contains a specific tag
   bool HasTag(std::string);
   /// @brief Perform a Seven Tag Roster compliance check
-- 
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