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Merge pull request #1451 from kristate/fmt-hexbytes-issue1358

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allow bytes to be printed-out as hex (#1358)
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Andrew Kelley 2018-09-01 10:44:54 -04:00 committed by GitHub
commit 1a5c3e4501
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1 changed files with 11 additions and 0 deletions
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11
std/fmt/index.zig
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@ -350,6 +350,11 @@ pub fn formatText(
comptime var width = 0;
if (fmt.len > 1) width = comptime (parseUnsigned(usize, fmt[1..], 10) catch unreachable);
return formatBuf(bytes, width, context, Errors, output);
} else if ((fmt[0] == 'x') or (fmt[0] == 'X') ) {
for (bytes) |c| {
try formatInt(c, 16, fmt[0] == 'X', 0, context, Errors, output);
}
return;
} else @compileError("Unknown format character: " ++ []u8{fmt[0]});
}
return output(context, bytes);
@ -1271,6 +1276,12 @@ test "fmt.format" {
try testFmt("E.Two", "{}", inst);
}
//print bytes as hex
{
const some_bytes = "\xCA\xFE\xBA\xBE";
try testFmt("lowercase: cafebabe\n", "lowercase: {x}\n", some_bytes);
try testFmt("uppercase: CAFEBABE\n", "uppercase: {X}\n", some_bytes);
}
}
fn testFmt(expected: []const u8, comptime template: []const u8, args: ...) !void {