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feat(c-api) wasm_module_name sets out to {0, NULL} in case of failure.

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This commit is contained in:
Ivan Enderlin
2020-12-15 16:29:17 +01:00
parent 778681e8a0
commit 17a1900c8b
1 changed files with 8 additions and 3 deletions
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11
lib/c-api/src/wasm_c_api/wasmer.rs
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@@ -2,11 +2,12 @@
use super::module::wasm_module_t;
use super::types::wasm_name_t;
use std::ptr;
use std::str;
use std::sync::Arc;
/// Non-standard Wasmer-specific API to get the module's name,
/// otherwise `out` is untouched.
/// otherwise `out->size` is set to `0` and `out->data` to `NULL`.
///
/// # Example
///
@@ -60,7 +61,12 @@ pub unsafe extern "C" fn wasm_module_name(
) {
let name = match module.inner.name() {
Some(name) => name,
None => return,
None => {
out.data = ptr::null_mut();
out.size = 0;
return;
}
};
*out = name.as_bytes().to_vec().into();
@@ -95,7 +101,6 @@ pub unsafe extern "C" fn wasm_module_name(
/// // Read the module's name. There is none for the moment.
/// {
/// wasm_name_t name;
/// name.size = 0;
/// wasm_module_name(module, &name);
///
/// assert(name.size == 0);