Zig 0.17.0-dev (Split by item)

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memmem

string.memmem

fn memmem(haystack: *const anyopaque, haystack_len: usize, needle: *const anyopaque, needle_len: usize) callconv(.c) ?*anyopaque

File

lib/c/string.zig:230

Code

fn memmem(haystack: *const anyopaque, haystack_len: usize, needle: *const anyopaque, needle_len: usize) callconv(.c) ?*anyopaque {
    const haystack_bytes: [*:0]const u8 = @ptrCast(haystack);
    const needle_bytes: [*:0]const u8 = @ptrCast(needle);

    return @constCast(haystack_bytes[std.mem.find(u8, haystack_bytes[0..haystack_len], needle_bytes[0..needle_len]) orelse return null ..]);
}