Add contains_file_named

CHANGELOG.md

@@ -267,4 +267,11 @@
 ### Changed
 
  - Eliminated a custom `AtomicU64` type by replacing it with `OnceLock` in the only place it's used.
- - `FileOptions` now has the subtype `SimpleFileOptions` which implements `Copy` but has no extra data.
+ - `FileOptions` now has the subtype `SimpleFileOptions` which implements `Copy` but has no extra data.
+ 
+## [1.1.1]
+
+### Added
+
+ - `contains_file_named`: check whether a file entry exists in a zip file, without initializing the
+   metadata or needing to mutably borrow the `ZipArchive`.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "zip"
-version = "1.1.0"
+version = "1.1.1"
 authors = [
     "Mathijs van de Nes <git@mathijs.vd-nes.nl>",
     "Marli Frost <marli@frost.red>",

README.md

@@ -4,7 +4,7 @@ zip
 [![Build Status](https://github.com/Pr0methean/zip-next/actions/workflows/ci.yaml/badge.svg)](https://github.com/Pr0methean/zip-next/actions?query=branch%3Amaster+workflow%3ACI)
 [![Crates.io version](https://img.shields.io/crates/v/zip.svg)](https://crates.io/crates/zip)
 
-[Documentation](https://docs.rs/zip/1.1.0/zip/)
+[Documentation](https://docs.rs/zip/latest/zip/)
 
 Info
 ----
@@ -33,14 +33,14 @@ With all default features:
 
 ```toml
 [dependencies]
-zip = "1.1.0"
+zip = "1.1.1"
 ```
 
 Without the default features:
 
 ```toml
 [dependencies]
-zip = { version = "1.1.0", default-features = false }
+zip = { version = "1.1.1", default-features = false }
 ```
 
 The features available are:
@@ -53,7 +53,8 @@ The features available are:
   This is the fastest `deflate` implementation available.
 * `deflate-zopfli`: Enables deflating files with the `zopfli` library (used when compression quality is 10..=264). This
   is the most effective `deflate` implementation available.
-* `deflate64`: Enables the deflate64 compression algorithm. Decompression is only supported.
+* `deflate64`: Enables the deflate64 compression algorithm. Only decompression is supported.
+* `lzma`: Enables the LZMA compression algorithm. Only decompression is supported.
 * `bzip2`: Enables the BZip2 compression algorithm.
 * `time`: Enables features using the [time](https://github.com/rust-lang-deprecated/time) crate.
 * `chrono`: Enables converting last-modified `zip::DateTime` to and from `chrono::NaiveDateTime`.

src/lib.rs

@@ -53,6 +53,6 @@ mod zipcrypto;
 ///
 /// ```toml
 /// [dependencies]
-/// zip = "=1.1.0"
+/// zip = "=1.1.1"
 /// ```
 pub mod unstable;

src/read.rs

@@ -650,6 +650,11 @@ impl<R: Read + Seek> ZipArchive<R> {
     pub fn by_name(&mut self, name: &str) -> ZipResult<ZipFile> {
         self.by_name_with_optional_password(name, None)
     }
+    
+    /// Check for a file entry, but do not decrypt it or initialize metadata.
+    pub fn contains_file_named(&self, name: &str) -> bool {
+        self.shared.names_map.contains_key(name)
+    }
 
     fn by_name_with_optional_password<'a>(
         &'a mut self,