1.4 KiB
Foreign Library
The (cyclone foreign) provides a convenient interface for integrating with C code. It is based in concept on the (chicken foreign) module from CHICKEN Scheme. Similarly to that module, this library manipulates the C code directly before it is compiled to a native binary. It is not possible to call these forms at runtime.
TODO: list of type specifiers built-in types Scheme | C int | int integer | int bool | int char | int string | char * symbol | const char * bytevector | char * float | double double | double bignum | mp_int opaque | void *
c-code
Syntax
(c-code CODE ...)
Insert C code directly into the compiled program. Each CODE parameter must be a string containing C code.
c-value
Syntax
(c-value CODE TYPE)
Generate code that takes the C code specified by the string CODE and converts it to a Scheme object of type TYPE.
c-define
Syntax
(c-define SCM-FUNC RETURN-TYPE C-FUNC TYPE ...)
Define a Scheme function SCM-FUNC returning an object of type RETURN-TYPE. The function will call C function specified by the string C-FUNC passed parameters of type specified by any TYPE arguments.
For example, to define a function that calls strlen:
(c-define scm-strlen int "strlen" string)
Note that these definitions are introduced at the top-level.