mirror/zig
1
0
Fork 0
mirror of https://github.com/ziglang/zig.git synced 2026-01-20 14:25:16 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #6888 from jcmoyer/issues/6874

Browse Source 
Update std.fmt docs and add test for null terminated slices with embedded null bytes
This commit is contained in:
Andrew Kelley 2020-11-01 18:30:09 -05:00 committed by GitHub
commit af60931a48
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
lib/std/fmt.zig
View File

@ -64,7 +64,9 @@ fn peekIsAlign(comptime fmt: []const u8) bool {
/// - `x` and `X`:
/// - format the non-numeric value as a string of bytes in hexadecimal notation ("binary dump") in either lower case or upper case
/// - output numeric value in hexadecimal notation
/// - `s`: print a pointer-to-many as a c-string, use zero-termination
/// - `s`:
/// - for pointer-to-many and C pointers of u8, print as a C-string using zero-termination
/// - for slices of u8, print the entire slice as a string without zero-termination
/// - `z`: escape the string with @"" syntax if it is not a valid Zig identifier.
/// - `Z`: print the string escaping non-printable characters using Zig escape sequences.
/// - `B` and `Bi`: output a memory size in either metric (1000) or power-of-two (1024) based notation. works for both float and integer values.
@ -1383,6 +1385,10 @@ test "slice" {
const value = @intToPtr([*]align(1) const []const u8, 0xdeadbeef)[runtime_zero..runtime_zero];
try testFmt("slice: []const u8@deadbeef\n", "slice: {}\n", .{value});
}
{
const null_term_slice: [:0]const u8 = "\x00hello\x00";
try testFmt("buf: \x00hello\x00\n", "buf: {s}\n", .{null_term_slice});
}
try testFmt("buf: Test\n", "buf: {s:5}\n", .{"Test"});
try testFmt("buf: Test\n Other text", "buf: {s}\n Other text", .{"Test"});