pokeplatinum/tools/m2ctx

Generate a context file for decomp.me

Decomp.me requires a context file declaring any imported typedefs, structs, or constants that will be used in the decompiled function. m2ctx generates this context file automatically.

How to use

Before using m2ctx, follow the installation instructions to make a vanilla copy of the game. This generates some header files that may be included in decompiled files.

In this example, you are decompiling an asm file asm/npc_trade.s into a new C file src/npc_trade.c. You've created the source file and may have added some imports you know you'll need. Your file may look like this:

#include "pokemon.h"

Run ./tools/m2ctx/m2ctx.sh src/npc_trade.c to generate a context file, which will be output as ctx.c. Copy the contents of ctx.c into the "Context" section of the scratch.

Adding imports

As you continue decompiling, you may realize that you need to add imports to your source file:

#include "pokemon.h"
+#include "party.h"

You can use m2ctx to generate an updated context file which will include declarations from the new imports. Simply re-run the command to generate a new context file: ./tools/m2ctx/m2ctx.sh src/npc_trade.c.