Merge pull request #97 from retro-wertz/fix_cheat

Backport cheat support fixes
libretro · May 30, 2018 · d69855a · d69855a
2 parents fbb708c + 1c03729
commit d69855a
Showing 1 changed file with 65 additions and 2 deletions.
diff --git a/libretro/libretro.cpp b/libretro/libretro.cpp
@@ -3,6 +3,8 @@
 #include <stdarg.h>
 #include <string.h>
 #include <ctype.h>
+#include <string>
+#include <vector>
 
 #include "libretro.h"
 
@@ -580,7 +582,7 @@ void retro_cheat_reset(void)
 
 void retro_cheat_set(unsigned index, bool enabled, const char *code)
 {
-   const char *begin, *c;
+   /*const char *begin, *c;
 
    begin = c = code;
 
@@ -617,7 +619,68 @@ void retro_cheat_set(unsigned index, bool enabled, const char *code)
             log_cb(RETRO_LOG_ERROR, "[VBA] Invalid cheat code '%s'\n", buf);
       }
 
-   } while (*c++);
+   } while (*c++);*/
+
+   #define ISHEXDEC \
+      ((codeLine[cursor] >= '0') && (codeLine[cursor] <= '9')) || \
+      ((codeLine[cursor] >= 'a') && (codeLine[cursor] <= 'f')) || \
+      ((codeLine[cursor] >= 'A') && (codeLine[cursor] <= 'F')) \
+
+   std::string codeLine = code;
+   std::string name = "cheat_" + index;
+   int matchLength = 0;
+   std::vector<std::string> codeParts;
+   int cursor;
+
+   //Break the code into Parts
+   for (cursor=0;;cursor++)
+   {
+      if (ISHEXDEC)
+         matchLength++;
+      else
+      {
+         if (matchLength)
+         {
+            if (matchLength > 8)
+            {
+               codeParts.push_back(codeLine.substr(cursor - matchLength, 8));
+               codeParts.push_back(codeLine.substr(cursor - matchLength + 8, matchLength - 8));
+            }
+            else
+               codeParts.push_back(codeLine.substr(cursor - matchLength, matchLength));
+
+            matchLength = 0;
+         }
+      }
+      if (!codeLine[cursor])
+         break;
+   }
+
+   //Add to core
+   for (cursor = 0; cursor<codeParts.size(); cursor += 2)
+   {
+      std::string codeString;
+      codeString += codeParts[cursor];
+
+      if (codeParts[cursor + 1].length() == 8)
+      {
+         codeString += codeParts[cursor + 1];
+         cheatsAddGSACode(codeString.c_str(), name.c_str(), true);
+      }
+      else if (codeParts[cursor + 1].length() == 4)
+      {
+         codeString += " ";
+         codeString += codeParts[cursor + 1];
+         cheatsAddCBACode(codeString.c_str(), name.c_str());
+      }
+      else
+      {
+         codeString += " ";
+         codeString += codeParts[cursor + 1];
+         log_cb(RETRO_LOG_ERROR, "Invalid cheat code '%s'\n", codeString.c_str());
+      }
+      log_cb(RETRO_LOG_INFO, "Cheat code added: '%s'\n", codeString.c_str());
+   }
 }
 
 bool retro_load_game(const struct retro_game_info *game)