27 lines
761 B
Rust
27 lines
761 B
Rust
//! Debug-formatting of account data.
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use std::{cmp, fmt};
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pub(crate) const MAX_DEBUG_ACCOUNT_DATA: usize = 64;
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/// Format data as hex.
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///
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/// If `data`'s length is greater than 0, add a field called "data" to `f`. The
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/// first 64 bytes of `data` is displayed; bytes after that are ignored.
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pub fn debug_account_data(data: &[u8], f: &mut fmt::DebugStruct<'_, '_>) {
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let data_len = cmp::min(MAX_DEBUG_ACCOUNT_DATA, data.len());
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if data_len > 0 {
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f.field("data", &Hex(&data[..data_len]));
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}
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}
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pub(crate) struct Hex<'a>(pub(crate) &'a [u8]);
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impl fmt::Debug for Hex<'_> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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for &byte in self.0 {
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write!(f, "{:02x}", byte)?;
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}
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Ok(())
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}
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}
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