browser-window-ffi 0.4.1

FFI bindings for the browser-window crate.
Documentation 
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#ifndef BW_ERR_H
#define BW_ERR_H


#ifdef __cplusplus
extern "C" {
#endif

#include <stdlib.h>
#include <string.h>



typedef unsigned int bw_ErrCode;

typedef struct bw_Err {
	bw_ErrCode code;
	const void* data;
	char* (*alloc_message)( bw_ErrCode code, const void* data );	/// Returns a newly allocated pointer to a null terminated utf8 string that describes the error
} bw_Err;

#define BW_ERR_CODE_SUCCESS 0


#define BW_ERR_RETURN( CODE, DATA_PTR, MESSAGE_FUNC ) \

	{ bw_Err r; r.code = CODE; r.data = (const void*)DATA_PTR; r.alloc_message = MESSAGE_FUNC; return r; }

#define BW_ERR_RETURN_SUCCESS \

	BW_ERR_RETURN( BW_ERR_CODE_SUCCESS, 0, bw_Err_msg_success )

#define BW_ERR_MSG_DEF( FUNC, MSG ) \

	char* FUNC( bw_ErrCode code, const void* data ) { \
		(void)(code); \
		(void)(data); \
		char* msg = (char*)malloc( strlen( MSG ) + 1 ); \
		strcpy( msg, MSG ); \
		return msg; \
	}



char* bw_Err_msg_success( bw_ErrCode, const void* );
char* bw_Err_msg_string( bw_ErrCode, const void* );

// Should always be called on a bw_Err.
// Frees internal data from the heap.
void bw_Err_free( bw_Err* err );
// Creates a new initialized bw_Err, with the given code and message.
// The alloc_message pointer will return the same message as given here.
bw_Err bw_Err_new_with_msg( bw_ErrCode code, const char* msg );




#ifdef __cplusplus
}	// extern "C"
#endif

#endif//BW_ERR_H