bytewords: use static allocated hash map

The hash map is generated at compile time, this is to not allocate at runtime the HashMap as I'm going to make some PRs to make this crate no_std friendly. Signed-off-by: Jean-Pierre De Jesus DIAZ <me@jeandudey.tech>
dspicher · Dec 11, 2022 · e8cd00e · e8cd00e
1 parent 00dd637
commit e8cd00e
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Showing 4 changed files with 610 additions and 534 deletions.
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
@@ -12,7 +12,7 @@ anyhow = "1.0.64"
 bitcoin_hashes = "0.11.0"
 crc = "3.0.0"
 hex = "0.4.3"
-once_cell = "1.16.0"
+phf = { version = "0.11.1", features = ["macros"], default-features = false }
 rand_xoshiro = "0.6.0"
 serde = "1.0.147"
 serde_cbor = { version = "0.11.2", features = ["tags"] }

diff --git a/src/bytewords.rs b/src/bytewords.rs
@@ -111,7 +111,7 @@ fn decode_minimal(encoded: &str) -> Result<Vec<u8>, Error> {
 
 fn decode_from_index(
     keys: &mut dyn Iterator<Item = &str>,
-    indexes: &std::collections::HashMap<&'static str, u8>,
+    indexes: &phf::Map<&'static str, u8>,
 ) -> Result<Vec<u8>, Error> {
     strip_checksum(
         &keys