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std › fs › path › extension

extension

Searches for a file extension separated by a . and returns the string after that .. Files that end or start with . and have no other . in their name are considered to have no extension, in which case this returns "". Examples:

  • "main.zig" ⇒ ".zig"
  • "src/main.zig" ⇒ ".zig"
  • ".gitignore" ⇒ ""
  • ".image.png" ⇒ ".png"
  • "keep." ⇒ "."
  • "src.keep.me" ⇒ ".me"
  • "/src/keep.me" ⇒ ".me"
  • "/src/keep.me/" ⇒ ".me" The returned slice is guaranteed to have its pointer within the start and end pointer address range of path, even if it is length zero.

Function parameters

Parameters

#
path:[]const u8

Type definitions in this namespace

Types

#

Returns if the given byte is a valid path separator

Functions

#
isSep
Returns if the given byte is a valid path separator
join
Naively combines a series of paths with the native path separator.
joinZ
Naively combines a series of paths with the native path separator and null terminator.
resolve
On Windows, this calls `resolveWindows` and on POSIX it calls `resolvePosix`.
resolveWindows
This function is like a series of `cd` statements executed one after another.
resolvePosix
This function is like a series of `cd` statements executed one after another.
dirname
Strip the last component from a file path.
relative
Returns the relative path from `from` to `to`.
extension
Searches for a file extension separated by a `.` and returns the string after that `.`.
stem
Returns the last component of this path without its extension (if any):
ComponentIterator
A path component iterator that can move forwards and backwards.
fmtAsUtf8Lossy
Format a path encoded as bytes for display as UTF-8.
fmtWtf16LeAsUtf8Lossy
Format a path encoded as WTF-16 LE for display as UTF-8.

= '\\'

Values

#
sep
= switch (native_os) { .windows, .uefi => sep_windows, else => sep_posix, }
sep_str
= switch (native_os) { .windows, .uefi => sep_str_windows, else => sep_str_posix, }
delimiter
= if (native_os == .windows) delimiter_windows else delimiter_posix

Source

Implementation

#
pub fn extension(path: []const u8) []const u8 {
    const filename = basename(path);
    const index = mem.lastIndexOfScalar(u8, filename, '.') orelse return path[path.len..];
    if (index == 0) return path[path.len..];
    return filename[index..];
}