boltffi_bindgen 0.2.0

Code generation library for BoltFFI - generates Swift, Kotlin, and TypeScript bindings
Documentation 
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JNIEXPORT jlong JNICALL {{ jni_name }}(JNIEnv *env, jclass cls{{ jni_params }}) {
    bool _boltffi_input_error = false;
{%- for param in params %}
{%- if param.is_string() %}
    const char* _{{ param.name }}_c = {{ param.name }} ? (*env)->GetStringUTFChars(env, {{ param.name }}, NULL) : NULL;
    if ({{ param.name }} != NULL && _{{ param.name }}_c == NULL) _boltffi_input_error = true;
{%- endif %}
{%- if param.is_primitive_array() %}
    uintptr_t _{{ param.name }}_len = (uintptr_t)(*env)->GetArrayLength(env, {{ param.name }});
    {{ param.array_c_type() }}* _{{ param.name }}_ptr = ({{ param.array_c_type() }}*)(*env)->{{ param.array_get_elements_fn() }}(env, {{ param.name }}, NULL);
    if (_{{ param.name }}_ptr == NULL) { _{{ param.name }}_len = 0; _boltffi_input_error = true; }
{%- endif %}
{%- if param.is_buffer() %}
    jlong _{{ param.name }}_size = (*env)->GetDirectBufferCapacity(env, {{ param.name }});
    uint8_t* _{{ param.name }}_ptr = (uint8_t*)(*env)->GetDirectBufferAddress(env, {{ param.name }});
    uintptr_t _{{ param.name }}_len = (_{{ param.name }}_ptr && _{{ param.name }}_size > 0) ? (uintptr_t)_{{ param.name }}_size : 0;
{%- endif %}
{%- if param.is_composite() %}
    jlong _{{ param.name }}_size = (*env)->GetDirectBufferCapacity(env, {{ param.name }});
    uint8_t* _{{ param.name }}_ptr = (uint8_t*)(*env)->GetDirectBufferAddress(env, {{ param.name }});
    {{ param.composite_c_type() }} _{{ param.name }}_val;
    if (_{{ param.name }}_ptr && _{{ param.name }}_size >= (jlong)sizeof({{ param.composite_c_type() }})) {
        memcpy(&_{{ param.name }}_val, _{{ param.name }}_ptr, sizeof({{ param.composite_c_type() }}));
    } else {
        memset(&_{{ param.name }}_val, 0, sizeof({{ param.composite_c_type() }}));
        _boltffi_input_error = true;
    }
{%- endif %}

{%- endfor %}
    void* _handle = NULL;
    if (_boltffi_input_error) goto boltffi_input_cleanup;
    _handle = {{ ffi_name }}({% for param in params %}{{ param.ffi_arg() }}{% if !loop.last %}, {% endif %}{% endfor %});
boltffi_input_cleanup:
{%- for param in params %}
{%- if param.is_primitive_array() %}
    if (_{{ param.name }}_ptr != NULL) (*env)->{{ param.array_release_elements_fn() }}(env, {{ param.name }}, ({{ param.array_elements_ptr_type() }})_{{ param.name }}_ptr, {{ param.array_release_mode() }});
{%- endif %}
{%- if param.is_string() %}
    if (_{{ param.name }}_c != NULL) (*env)->ReleaseStringUTFChars(env, {{ param.name }}, _{{ param.name }}_c);
{%- endif %}

{%- endfor %}
    if (_boltffi_input_error) return 0;
    return (jlong)_handle;
}