digitalmars.D - Convert "C Function Pointer" to D?
- Robert (20/20) Jun 03 2010 Hi, I have something like this:
- Steven Schveighoffer (11/28) Jun 03 2010 extern(C) {
- Robert Clipsham (10/27) Jun 03 2010 extern(C):
- Eric Poggel (6/23) Jun 03 2010 You might take a look at the Derelict project
Hi, I have something like this:
struct ext_api {
int version;
void *(*make_block)(u32 size);
void *(*make_string)(u32 size, int uni);
u32 *(*map_words)(REBSER *ser);
u32 (*find_word)(u32 *words, u32 word);
int (*series_info)(REBSER *ser, REBCNT what);
int (*get_char)(REBSER *ser, u32 index);
u32 (*set_char)(REBSER *ser, u32 index, u32 chr);
int (*get_value)(REBSER *ser, u32 index, RXIARG *val);
int (*set_value)(REBSER *ser, u32 index, RXIARG val, int type);
int (*get_string)(REBSER *ser, u32 index, void **str);
}
How do I convert such a struct to D? I will get a ext_api pointer from
a C compiled program and use this pointer via the struct to call the C
functions.
--
Robert M. Münch
http://www.robertmuench.de
Jun 03 2010
"Steven Schveighoffer" <schveiguy yahoo.com> On Thu, 03 Jun 2010 14:28:21 -0400, Robert <robert.muench robertmuench.de> wrote:Hi, I have something like this:extern(C) {struct ext_api { int version; void *(*make_block)(u32 size); void *(*make_string)(u32 size, int uni); u32 *(*map_words)(REBSER *ser); u32 (*find_word)(u32 *words, u32 word); int (*series_info)(REBSER *ser, REBCNT what); int (*get_char)(REBSER *ser, u32 index); u32 (*set_char)(REBSER *ser, u32 index, u32 chr); int (*get_value)(REBSER *ser, u32 index, RXIARG *val); int (*set_value)(REBSER *ser, u32 index, RXIARG val, int type); int (*get_string)(REBSER *ser, u32 index, void **str); }}How do I convert such a struct to D? I will get a ext_api pointer from a C compiled program and use this pointer via the struct to call the C functions.Like I wrote above. Of course, if you wish to make it more d-like, change void *(*make_block)(u32 size); to void * function(u32 size) make_block; Of course, you still need extern(C) around the whole thing to have C linkage. -Steve
Jun 03 2010
On 03/06/10 19:28, Robert wrote:
Hi, I have something like this:
struct ext_api {
int version;
void *(*make_block)(u32 size);
void *(*make_string)(u32 size, int uni);
u32 *(*map_words)(REBSER *ser);
u32 (*find_word)(u32 *words, u32 word);
int (*series_info)(REBSER *ser, REBCNT what);
int (*get_char)(REBSER *ser, u32 index);
u32 (*set_char)(REBSER *ser, u32 index, u32 chr);
int (*get_value)(REBSER *ser, u32 index, RXIARG *val);
int (*set_value)(REBSER *ser, u32 index, RXIARG val, int type);
int (*get_string)(REBSER *ser, u32 index, void **str);
}
How do I convert such a struct to D? I will get a ext_api pointer from a
C compiled program and use this pointer via the struct to call the C
functions.
extern(C):
struct ext_api {
int version;
void* function(u32 size) make_block;
void* function(u32, size, int uni) make_string;
u32* function(REBSER* ser) map_words;
/* etc */
}
Make sure you define u32 etc before the struct.
Jun 03 2010
On 6/3/2010 2:28 PM, Robert wrote:
Hi, I have something like this:
struct ext_api {
int version;
void *(*make_block)(u32 size);
void *(*make_string)(u32 size, int uni);
u32 *(*map_words)(REBSER *ser);
u32 (*find_word)(u32 *words, u32 word);
int (*series_info)(REBSER *ser, REBCNT what);
int (*get_char)(REBSER *ser, u32 index);
u32 (*set_char)(REBSER *ser, u32 index, u32 chr);
int (*get_value)(REBSER *ser, u32 index, RXIARG *val);
int (*set_value)(REBSER *ser, u32 index, RXIARG val, int type);
int (*get_string)(REBSER *ser, u32 index, void **str);
}
How do I convert such a struct to D? I will get a ext_api pointer from a
C compiled program and use this pointer via the struct to call the C
functions.
You might take a look at the Derelict project
(dsource.org/projects/derelict) to see a large amount of C code
converted to D. I think
http://dsource.org/projects/derelict/browser/trunk/DerelictVorbis/derel
ct/ogg/vorbisfile.d
had something very similar to this, line 52.
Jun 03 2010