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use super::VmApiImpl;
use elrond_wasm::{
api::{Handle, LogApi},
types::ArgBuffer,
};
extern "C" {
fn writeLog(pointer: *const u8, length: i32, topicPtr: *const u8, numTopics: i32);
fn writeEventLog(
numTopics: i32,
topicLengthsOffset: *const u8,
topicOffset: *const u8,
dataOffset: *const u8,
dataLength: i32,
);
#[cfg(not(feature = "unmanaged-ei"))]
fn managedWriteLog(topicsHandle: i32, dataHandle: i32);
}
const LEGACY_TOPIC_LENGTH: usize = 32;
impl LogApi for VmApiImpl {
fn write_event_log(&self, topics_buffer: &ArgBuffer, data: &[u8]) {
unsafe {
writeEventLog(
topics_buffer.num_args() as i32,
topics_buffer.arg_lengths_bytes_ptr(),
topics_buffer.arg_data_ptr(),
data.as_ptr(),
data.len() as i32,
);
}
}
fn write_legacy_log(&self, topics: &[[u8; 32]], data: &[u8]) {
let mut topics_raw = [0u8; LEGACY_TOPIC_LENGTH * 10];
for i in 0..topics.len() {
topics_raw[LEGACY_TOPIC_LENGTH * i..LEGACY_TOPIC_LENGTH * (i + 1)]
.copy_from_slice(&topics[i]);
}
unsafe {
writeLog(
data.as_ptr(),
data.len() as i32,
topics_raw.as_ptr(),
topics.len() as i32,
);
}
}
#[cfg(feature = "unmanaged-ei")]
fn managed_write_log(&self, topics_handle: Handle, data_handle: Handle) {
use elrond_wasm::types::{
managed_vec_of_buffers_to_arg_buffer, ManagedBuffer, ManagedType, ManagedVec,
};
let topics = ManagedVec::<Self, ManagedBuffer<Self>>::from_raw_handle(topics_handle);
let topics_arg_buffer = managed_vec_of_buffers_to_arg_buffer(&topics);
let data = ManagedBuffer::<Self>::from_raw_handle(data_handle);
self.write_event_log(&topics_arg_buffer, data.to_boxed_bytes().as_slice());
}
#[cfg(not(feature = "unmanaged-ei"))]
fn managed_write_log(&self, topics_handle: Handle, data_handle: Handle) {
unsafe {
managedWriteLog(topics_handle, data_handle);
}
}
}