51 lines
1.6 KiB
Rust
51 lines
1.6 KiB
Rust
// This file is part of ICU4X. For terms of use, please see the file
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// called LICENSE at the top level of the ICU4X source tree
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// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
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// This example demonstrates zero-copy, zero-allocation deserialization of a u32 vector
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// stored in a Bincode buffer.
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#![no_main] // https://github.com/unicode-org/icu4x/issues/395
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icu_benchmark_macros::static_setup!();
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use zerovec::ZeroVec;
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#[derive(serde::Serialize, serde::Deserialize)]
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struct DataStruct<'s> {
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#[serde(borrow)]
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pub nums: ZeroVec<'s, u16>,
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}
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const U16_SLICE: [u16; 16] = [
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196, 989, 414, 731, 660, 217, 716, 353, 218, 730, 245, 846, 122, 294, 922, 488,
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];
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const POSTCARD_BYTES: [u8; 33] = [
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0x20, 0xc4, 0x0, 0xdd, 0x3, 0x9e, 0x1, 0xdb, 0x2, 0x94, 0x2, 0xd9, 0x0, 0xcc, 0x2, 0x61, 0x1,
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0xda, 0x0, 0xda, 0x2, 0xf5, 0x0, 0x4e, 0x3, 0x7a, 0x0, 0x26, 0x1, 0x9a, 0x3, 0xe8, 0x1,
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];
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#[allow(dead_code)]
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fn serialize() {
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let data = DataStruct {
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nums: ZeroVec::from_slice_or_alloc(&U16_SLICE),
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};
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let postcard_bytes = postcard::to_stdvec(&data).expect("Serialization should be successful");
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println!("Postcard bytes: {postcard_bytes:#x?}");
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println!("ZeroVec bytes: {:#x?}", data.nums.as_bytes());
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}
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#[no_mangle]
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fn main(_argc: isize, _argv: *const *const u8) -> isize {
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icu_benchmark_macros::main_setup!();
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// Un-comment the following line to generate postcard data:
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// serialize();
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let data: DataStruct = postcard::from_bytes(&POSTCARD_BYTES).expect("Valid bytes");
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let result = data.nums.iter().sum::<u16>();
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assert_eq!(8141, result);
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0
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}
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