alef 0.24.7

Opinionated polyglot binding generator for Rust libraries
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

// C helper function to construct the {{ c_vtable_struct }} vtable with proper function pointers.
// Function pointers must be populated in C using address-of operators (&) to ensure
// ABI-correct values on all platforms (especially ARM64 macOS where unsafe.Pointer casts fail).
static {{ c_vtable_struct }}* {{ vtable_constructor }}(
{%- for method in method_pascal_names %}
	void (*go{{ trait_pascal }}{{ method }})(void)
	{%- if not loop.last %},{% endif %}
{%- endfor %}
) {
	{{ c_vtable_struct }}* vtable = ({{ c_vtable_struct }}*)malloc(sizeof({{ c_vtable_struct }}));
	if (!vtable) return NULL;
	memset(vtable, 0, sizeof({{ c_vtable_struct }}));

{%- for field_name in method_field_names %}
	vtable->{{ field_name }} = (void(*)(void))go{{ trait_pascal }}{{ method_pascal_names[loop.index0] }};
{%- endfor %}
	vtable->free_string = (void(*)(void))go{{ trait_pascal }}FreeString;
	vtable->free_user_data = (void(*)(void))go{{ trait_pascal }}FreeUserData;
	vtable->name_fn = (void(*)(void))go{{ trait_pascal }}Name;
	vtable->version_fn = (void(*)(void))go{{ trait_pascal }}Version;
	vtable->initialize_fn = (void(*)(void))go{{ trait_pascal }}Initialize;
	vtable->shutdown_fn = (void(*)(void))go{{ trait_pascal }}Shutdown;

	return vtable;
}