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use crate::ArwenApiImpl;
use elrond_wasm::api::LogApi;
use elrond_wasm::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,
);
}
const LEGACY_TOPIC_LENGTH: usize = 32;
impl LogApi for ArwenApiImpl {
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,
);
}
}
}