feat: direct call download api by cgo dart

ui/flutter/include/libgopeed.h

@@ -2,7 +2,6 @@
 
 /* package github.com/GopeedLab/gopeed/bind/desktop */
 
-
 #line 1 "cgo-builtin-export-prolog"
 
 #include <stddef.h>
@@ -11,19 +10,24 @@
 #define GO_CGO_EXPORT_PROLOGUE_H
 
 #ifndef GO_CGO_GOSTRING_TYPEDEF
-typedef struct { const char *p; ptrdiff_t n; } _GoString_;
+typedef struct {
+    const char *p;
+    ptrdiff_t n;
+} _GoString_;
 #endif
 
 #endif
 
 /* Start of preamble from import "C" comments.  */
 
+#line 3 "main.go"
 
+#include <stdlib.h>
 
+#line 1 "cgo-generated-wrapper"
 
 /* End of preamble from import "C" comments.  */
 
-
 /* Start of boilerplate cgo prologue.  */
 #line 1 "cgo-gcc-export-header-prolog"
 
@@ -56,15 +60,22 @@ typedef double _Complex GoComplex128;
   static assertion to make sure the file is being used on architecture
   at least with matching size of GoInt.
 */
-typedef char _check_for_64_bit_pointer_matching_GoInt[sizeof(void*)==64/8 ? 1:-1];
+typedef char _check_for_64_bit_pointer_matching_GoInt[sizeof(void *) == 64 / 8 ? 1 : -1];
 
 #ifndef GO_CGO_GOSTRING_TYPEDEF
 typedef _GoString_ GoString;
 #endif
 typedef void *GoMap;
 typedef void *GoChan;
-typedef struct { void *t; void *v; } GoInterface;
-typedef struct { void *data; GoInt len; GoInt cap; } GoSlice;
+typedef struct {
+    void *t;
+    void *v;
+} GoInterface;
+typedef struct {
+    void *data;
+    GoInt len;
+    GoInt cap;
+} GoSlice;
 
 #endif
 
@@ -74,14 +85,8 @@ typedef struct { void *data; GoInt len; GoInt cap; } GoSlice;
 extern "C" {
 #endif
 
-
-/* Return type for Start */
-struct Start_return {
-	GoInt r0;
-	char* r1;
-};
-extern struct Start_return Start(char* cfg);
-extern void Stop();
+extern __declspec(dllexport) char *Create(char *cfg);
+extern __declspec(dllexport) char *Invoke(GoInt index, char *req);
 
 #ifdef __cplusplus
 }