README.md

Curry-C

Proof of concept for C function currying

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What does it do?

This C code implements function currying, a feature of many functional programming languages (eg. CAML, Haskell) that allows partial function calls.

How does it do it?

When called, the curry function injects some assembly code in a byte buffer and then casts it to a function pointer. The function crafted in this way inserts the curried parameter on the stack before the return pointer and then jumps to the original function, effectively passing it as a regular parameter.

When should I use this?

Almost definitely never, it's just a proof of concept.

How can I try this?

git clone https://github.com/Alex23087/Curry-C.git
cd Curry-C
gcc -m32 -fno-stack-protector -z execstack -fPIE curry.c -o curry
./curry

This code only works on an x86 machine, it uses x86 ASM and calling conventions.
It's also limited in that it can only be used to curry a char func(char, char) to char func_c(char).