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std.fs.path: add stem()

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r00ster91 2022-10-23 18:58:24 +02:00
parent a0a50955f0
commit 7721c0cbef
1 changed files with 37 additions and 0 deletions
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37
lib/std/fs/path.zig
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@ -1319,3 +1319,40 @@ test "extension" {
try testExtension("/foo/bar/bam/a.b.c", ".c");
try testExtension("/foo/bar/bam/a.b.c/", ".c");
}
/// Returns the last component of this path without its extension (if any):
/// - "hello/world/lib.tar.gz" ⇒ "lib.tar"
/// - "hello/world/lib.tar" ⇒ "lib"
/// - "hello/world/lib" ⇒ "lib"
pub fn stem(path: []const u8) []const u8 {
const filename = basename(path);
const index = mem.lastIndexOfScalar(u8, filename, '.') orelse return filename[0..];
if (index == 0) return path;
return filename[0..index];
}
fn testStem(path: []const u8, expected: []const u8) !void {
try testing.expectEqualStrings(expected, stem(path));
}
test "stem" {
try testStem("hello/world/lib.tar.gz", "lib.tar");
try testStem("hello/world/lib.tar", "lib");
try testStem("hello/world/lib", "lib");
try testStem("hello/lib/", "lib");
try testStem("hello...", "hello..");
try testStem("hello.", "hello");
try testStem("/hello.", "hello");
try testStem(".gitignore", ".gitignore");
try testStem(".image.png", ".image");
try testStem("file.ext", "file");
try testStem("file.ext.", "file.ext");
try testStem("a.b.c", "a.b");
try testStem("a.b.c/", "a.b");
try testStem(".a", ".a");
try testStem("///", "");
try testStem("..", ".");
try testStem(".", ".");
try testStem(" ", " ");
try testStem("", "");
}