| ... | ... | @@ -489,3 +489,37 @@ test "fmt.format" { |
| 489 | 489 | assert(mem.eql(u8, result, "error union: error.InvalidChar\n")); |
| 490 | 490 | } |
| 491 | 491 | } |
| 492 | |
| 493 | pub fn trim(buf: []const u8) -> []const u8 { |
| 494 | var start: usize = 0; |
| 495 | while (start < buf.len and isWhiteSpace(buf[start])) : (start += 1) { } |
| 496 | |
| 497 | var end: usize = buf.len; |
| 498 | while (true) { |
| 499 | if (end > start) { |
| 500 | const new_end = end - 1; |
| 501 | if (isWhiteSpace(buf[new_end])) { |
| 502 | end = new_end; |
| 503 | continue; |
| 504 | } |
| 505 | } |
| 506 | break; |
| 507 | |
| 508 | } |
| 509 | return buf[start..end]; |
| 510 | } |
| 511 | |
| 512 | test "fmt.trim" { |
| 513 | assert(mem.eql(u8, "abc", trim("\n abc \t"))); |
| 514 | assert(mem.eql(u8, "", trim(" "))); |
| 515 | assert(mem.eql(u8, "", trim(""))); |
| 516 | assert(mem.eql(u8, "abc", trim(" abc"))); |
| 517 | assert(mem.eql(u8, "abc", trim("abc "))); |
| 518 | } |
| 519 | |
| 520 | pub fn isWhiteSpace(byte: u8) -> bool { |
| 521 | return switch (byte) { |
| 522 | ' ', '\t', '\n', '\r' => true, |
| 523 | else => false, |
| 524 | }; |
| 525 | } |
Andrew Kelley <andrew@ziglang.org> 2017-09-26 03:03:12-04:00
std