diff options
Diffstat (limited to 'jni/ruby/ext/fiddle/fiddle.c')
| -rw-r--r-- | jni/ruby/ext/fiddle/fiddle.c | 454 |
1 files changed, 454 insertions, 0 deletions
diff --git a/jni/ruby/ext/fiddle/fiddle.c b/jni/ruby/ext/fiddle/fiddle.c new file mode 100644 index 0000000..9f3d153 --- /dev/null +++ b/jni/ruby/ext/fiddle/fiddle.c @@ -0,0 +1,454 @@ +#include <fiddle.h> + +VALUE mFiddle; +VALUE rb_eFiddleError; + +#ifndef TYPE_SSIZE_T +# if SIZEOF_SIZE_T == SIZEOF_INT +# define TYPE_SSIZE_T TYPE_INT +# elif SIZEOF_SIZE_T == SIZEOF_LONG +# define TYPE_SSIZE_T TYPE_LONG +# elif defined HAVE_LONG_LONG && SIZEOF_SIZE_T == SIZEOF_LONG_LONG +# define TYPE_SSIZE_T TYPE_LONG_LONG +# endif +#endif +#define TYPE_SIZE_T (-1*SIGNEDNESS_OF_SIZE_T*TYPE_SSIZE_T) + +#ifndef TYPE_PTRDIFF_T +# if SIZEOF_PTRDIFF_T == SIZEOF_INT +# define TYPE_PTRDIFF_T TYPE_INT +# elif SIZEOF_PTRDIFF_T == SIZEOF_LONG +# define TYPE_PTRDIFF_T TYPE_LONG +# elif defined HAVE_LONG_LONG && SIZEOF_PTRDIFF_T == SIZEOF_LONG_LONG +# define TYPE_PTRDIFF_T TYPE_LONG_LONG +# endif +#endif + +#ifndef TYPE_INTPTR_T +# if SIZEOF_INTPTR_T == SIZEOF_INT +# define TYPE_INTPTR_T TYPE_INT +# elif SIZEOF_INTPTR_T == SIZEOF_LONG +# define TYPE_INTPTR_T TYPE_LONG +# elif defined HAVE_LONG_LONG && SIZEOF_INTPTR_T == SIZEOF_LONG_LONG +# define TYPE_INTPTR_T TYPE_LONG_LONG +# endif +#endif +#define TYPE_UINTPTR_T (-TYPE_INTPTR_T) + +void Init_fiddle_pointer(void); + +/* + * call-seq: Fiddle.malloc(size) + * + * Allocate +size+ bytes of memory and return the integer memory address + * for the allocated memory. + */ +static VALUE +rb_fiddle_malloc(VALUE self, VALUE size) +{ + void *ptr; + + ptr = (void*)ruby_xmalloc(NUM2SIZET(size)); + return PTR2NUM(ptr); +} + +/* + * call-seq: Fiddle.realloc(addr, size) + * + * Change the size of the memory allocated at the memory location +addr+ to + * +size+ bytes. Returns the memory address of the reallocated memory, which + * may be different than the address passed in. + */ +static VALUE +rb_fiddle_realloc(VALUE self, VALUE addr, VALUE size) +{ + void *ptr = NUM2PTR(addr); + + ptr = (void*)ruby_xrealloc(ptr, NUM2SIZET(size)); + return PTR2NUM(ptr); +} + +/* + * call-seq: Fiddle.free(addr) + * + * Free the memory at address +addr+ + */ +VALUE +rb_fiddle_free(VALUE self, VALUE addr) +{ + void *ptr = NUM2PTR(addr); + + ruby_xfree(ptr); + return Qnil; +} + +/* + * call-seq: Fiddle.dlunwrap(addr) + * + * Returns the hexadecimal representation of a memory pointer address +addr+ + * + * Example: + * + * lib = Fiddle.dlopen('/lib64/libc-2.15.so') + * => #<Fiddle::Handle:0x00000001342460> + * + * lib['strcpy'].to_s(16) + * => "7f59de6dd240" + * + * Fiddle.dlunwrap(Fiddle.dlwrap(lib['strcpy'].to_s(16))) + * => "7f59de6dd240" + */ +VALUE +rb_fiddle_ptr2value(VALUE self, VALUE addr) +{ + return (VALUE)NUM2PTR(addr); +} + +/* + * call-seq: Fiddle.dlwrap(val) + * + * Returns a memory pointer of a function's hexadecimal address location +val+ + * + * Example: + * + * lib = Fiddle.dlopen('/lib64/libc-2.15.so') + * => #<Fiddle::Handle:0x00000001342460> + * + * Fiddle.dlwrap(lib['strcpy'].to_s(16)) + * => 25522520 + */ +static VALUE +rb_fiddle_value2ptr(VALUE self, VALUE val) +{ + return PTR2NUM((void*)val); +} + +void Init_fiddle_handle(void); + +void +Init_fiddle(void) +{ + /* + * Document-module: Fiddle + * + * A libffi wrapper for Ruby. + * + * == Description + * + * Fiddle is an extension to translate a foreign function interface (FFI) + * with ruby. + * + * It wraps {libffi}[http://sourceware.org/libffi/], a popular C library + * which provides a portable interface that allows code written in one + * language to call code written in another language. + * + * == Example + * + * Here we will use Fiddle::Function to wrap {floor(3) from + * libm}[http://linux.die.net/man/3/floor] + * + * require 'fiddle' + * + * libm = Fiddle.dlopen('/lib/libm.so.6') + * + * floor = Fiddle::Function.new( + * libm['floor'], + * [Fiddle::TYPE_DOUBLE], + * Fiddle::TYPE_DOUBLE + * ) + * + * puts floor.call(3.14159) #=> 3.0 + * + * + */ + mFiddle = rb_define_module("Fiddle"); + + /* + * Document-class: Fiddle::DLError + * + * standard dynamic load exception + */ + rb_eFiddleError = rb_define_class_under(mFiddle, "DLError", rb_eStandardError); + + /* Document-const: TYPE_VOID + * + * C type - void + */ + rb_define_const(mFiddle, "TYPE_VOID", INT2NUM(TYPE_VOID)); + + /* Document-const: TYPE_VOIDP + * + * C type - void* + */ + rb_define_const(mFiddle, "TYPE_VOIDP", INT2NUM(TYPE_VOIDP)); + + /* Document-const: TYPE_CHAR + * + * C type - char + */ + rb_define_const(mFiddle, "TYPE_CHAR", INT2NUM(TYPE_CHAR)); + + /* Document-const: TYPE_SHORT + * + * C type - short + */ + rb_define_const(mFiddle, "TYPE_SHORT", INT2NUM(TYPE_SHORT)); + + /* Document-const: TYPE_INT + * + * C type - int + */ + rb_define_const(mFiddle, "TYPE_INT", INT2NUM(TYPE_INT)); + + /* Document-const: TYPE_LONG + * + * C type - long + */ + rb_define_const(mFiddle, "TYPE_LONG", INT2NUM(TYPE_LONG)); + +#if HAVE_LONG_LONG + /* Document-const: TYPE_LONG_LONG + * + * C type - long long + */ + rb_define_const(mFiddle, "TYPE_LONG_LONG", INT2NUM(TYPE_LONG_LONG)); +#endif + + /* Document-const: TYPE_FLOAT + * + * C type - float + */ + rb_define_const(mFiddle, "TYPE_FLOAT", INT2NUM(TYPE_FLOAT)); + + /* Document-const: TYPE_DOUBLE + * + * C type - double + */ + rb_define_const(mFiddle, "TYPE_DOUBLE", INT2NUM(TYPE_DOUBLE)); + + /* Document-const: TYPE_SIZE_T + * + * C type - size_t + */ + rb_define_const(mFiddle, "TYPE_SIZE_T", INT2NUM(TYPE_SIZE_T)); + + /* Document-const: TYPE_SSIZE_T + * + * C type - ssize_t + */ + rb_define_const(mFiddle, "TYPE_SSIZE_T", INT2NUM(TYPE_SSIZE_T)); + + /* Document-const: TYPE_PTRDIFF_T + * + * C type - ptrdiff_t + */ + rb_define_const(mFiddle, "TYPE_PTRDIFF_T", INT2NUM(TYPE_PTRDIFF_T)); + + /* Document-const: TYPE_INTPTR_T + * + * C type - intptr_t + */ + rb_define_const(mFiddle, "TYPE_INTPTR_T", INT2NUM(TYPE_INTPTR_T)); + + /* Document-const: TYPE_UINTPTR_T + * + * C type - uintptr_t + */ + rb_define_const(mFiddle, "TYPE_UINTPTR_T", INT2NUM(TYPE_UINTPTR_T)); + + /* Document-const: ALIGN_VOIDP + * + * The alignment size of a void* + */ + rb_define_const(mFiddle, "ALIGN_VOIDP", INT2NUM(ALIGN_VOIDP)); + + /* Document-const: ALIGN_CHAR + * + * The alignment size of a char + */ + rb_define_const(mFiddle, "ALIGN_CHAR", INT2NUM(ALIGN_CHAR)); + + /* Document-const: ALIGN_SHORT + * + * The alignment size of a short + */ + rb_define_const(mFiddle, "ALIGN_SHORT", INT2NUM(ALIGN_SHORT)); + + /* Document-const: ALIGN_INT + * + * The alignment size of an int + */ + rb_define_const(mFiddle, "ALIGN_INT", INT2NUM(ALIGN_INT)); + + /* Document-const: ALIGN_LONG + * + * The alignment size of a long + */ + rb_define_const(mFiddle, "ALIGN_LONG", INT2NUM(ALIGN_LONG)); + +#if HAVE_LONG_LONG + /* Document-const: ALIGN_LONG_LONG + * + * The alignment size of a long long + */ + rb_define_const(mFiddle, "ALIGN_LONG_LONG", INT2NUM(ALIGN_LONG_LONG)); +#endif + + /* Document-const: ALIGN_FLOAT + * + * The alignment size of a float + */ + rb_define_const(mFiddle, "ALIGN_FLOAT", INT2NUM(ALIGN_FLOAT)); + + /* Document-const: ALIGN_DOUBLE + * + * The alignment size of a double + */ + rb_define_const(mFiddle, "ALIGN_DOUBLE",INT2NUM(ALIGN_DOUBLE)); + + /* Document-const: ALIGN_SIZE_T + * + * The alignment size of a size_t + */ + rb_define_const(mFiddle, "ALIGN_SIZE_T", INT2NUM(ALIGN_OF(size_t))); + + /* Document-const: ALIGN_SSIZE_T + * + * The alignment size of a ssize_t + */ + rb_define_const(mFiddle, "ALIGN_SSIZE_T", INT2NUM(ALIGN_OF(size_t))); /* same as size_t */ + + /* Document-const: ALIGN_PTRDIFF_T + * + * The alignment size of a ptrdiff_t + */ + rb_define_const(mFiddle, "ALIGN_PTRDIFF_T", INT2NUM(ALIGN_OF(ptrdiff_t))); + + /* Document-const: ALIGN_INTPTR_T + * + * The alignment size of a intptr_t + */ + rb_define_const(mFiddle, "ALIGN_INTPTR_T", INT2NUM(ALIGN_OF(intptr_t))); + + /* Document-const: ALIGN_UINTPTR_T + * + * The alignment size of a uintptr_t + */ + rb_define_const(mFiddle, "ALIGN_UINTPTR_T", INT2NUM(ALIGN_OF(uintptr_t))); + + /* Document-const: WINDOWS + * + * Returns a boolean regarding whether the host is WIN32 + */ +#if defined(_WIN32) + rb_define_const(mFiddle, "WINDOWS", Qtrue); +#else + rb_define_const(mFiddle, "WINDOWS", Qfalse); +#endif + + /* Document-const: SIZEOF_VOIDP + * + * size of a void* + */ + rb_define_const(mFiddle, "SIZEOF_VOIDP", INT2NUM(sizeof(void*))); + + /* Document-const: SIZEOF_CHAR + * + * size of a char + */ + rb_define_const(mFiddle, "SIZEOF_CHAR", INT2NUM(sizeof(char))); + + /* Document-const: SIZEOF_SHORT + * + * size of a short + */ + rb_define_const(mFiddle, "SIZEOF_SHORT", INT2NUM(sizeof(short))); + + /* Document-const: SIZEOF_INT + * + * size of an int + */ + rb_define_const(mFiddle, "SIZEOF_INT", INT2NUM(sizeof(int))); + + /* Document-const: SIZEOF_LONG + * + * size of a long + */ + rb_define_const(mFiddle, "SIZEOF_LONG", INT2NUM(sizeof(long))); + +#if HAVE_LONG_LONG + /* Document-const: SIZEOF_LONG_LONG + * + * size of a long long + */ + rb_define_const(mFiddle, "SIZEOF_LONG_LONG", INT2NUM(sizeof(LONG_LONG))); +#endif + + /* Document-const: SIZEOF_FLOAT + * + * size of a float + */ + rb_define_const(mFiddle, "SIZEOF_FLOAT", INT2NUM(sizeof(float))); + + /* Document-const: SIZEOF_DOUBLE + * + * size of a double + */ + rb_define_const(mFiddle, "SIZEOF_DOUBLE",INT2NUM(sizeof(double))); + + /* Document-const: SIZEOF_SIZE_T + * + * size of a size_t + */ + rb_define_const(mFiddle, "SIZEOF_SIZE_T", INT2NUM(sizeof(size_t))); + + /* Document-const: SIZEOF_SSIZE_T + * + * size of a ssize_t + */ + rb_define_const(mFiddle, "SIZEOF_SSIZE_T", INT2NUM(sizeof(size_t))); /* same as size_t */ + + /* Document-const: SIZEOF_PTRDIFF_T + * + * size of a ptrdiff_t + */ + rb_define_const(mFiddle, "SIZEOF_PTRDIFF_T", INT2NUM(sizeof(ptrdiff_t))); + + /* Document-const: SIZEOF_INTPTR_T + * + * size of a intptr_t + */ + rb_define_const(mFiddle, "SIZEOF_INTPTR_T", INT2NUM(sizeof(intptr_t))); + + /* Document-const: SIZEOF_UINTPTR_T + * + * size of a uintptr_t + */ + rb_define_const(mFiddle, "SIZEOF_UINTPTR_T", INT2NUM(sizeof(uintptr_t))); + + /* Document-const: RUBY_FREE + * + * Address of the ruby_xfree() function + */ + rb_define_const(mFiddle, "RUBY_FREE", PTR2NUM(ruby_xfree)); + + /* Document-const: BUILD_RUBY_PLATFORM + * + * Platform built against (i.e. "x86_64-linux", etc.) + * + * See also RUBY_PLATFORM + */ + rb_define_const(mFiddle, "BUILD_RUBY_PLATFORM", rb_str_new2(RUBY_PLATFORM)); + + rb_define_module_function(mFiddle, "dlwrap", rb_fiddle_value2ptr, 1); + rb_define_module_function(mFiddle, "dlunwrap", rb_fiddle_ptr2value, 1); + rb_define_module_function(mFiddle, "malloc", rb_fiddle_malloc, 1); + rb_define_module_function(mFiddle, "realloc", rb_fiddle_realloc, 2); + rb_define_module_function(mFiddle, "free", rb_fiddle_free, 1); + + Init_fiddle_function(); + Init_fiddle_closure(); + Init_fiddle_handle(); + Init_fiddle_pointer(); +} +/* vim: set noet sws=4 sw=4: */ |