Code page 437

Code page 437, the character set of the original IBM PC, which old zip archives use for entry names.

Source: runtime/text/code_page_437.pep

CodePage437

struct CodePage437

Encodes a String to code page 437 bytes and decodes them back. Bytes below 128 are ASCII; each of the 128 above stands for one character (accented letters, Greek letters, box-drawing and math symbols), so every byte decodes and decode always succeeds. Bytes below 32 decode as the ASCII control characters, not the PC’s graphical glyphs, as zip readers do.

Example

import text;

var bytes = text.CodePage437.encode("café").value();
assert(bytes.count == 4 && bytes[3] == 0x82, "é is 0x82");
assert(text.CodePage437.decode(bytes) == "café", "round trip");

Static methods

encode

static encode(value: String): u8[]?

Returns the code page 437 bytes of value, or none when it holds a character the code page lacks.

Parameters

• value — the text to encode

Returns

• a new array of one byte per code point, or none

encode_lossy

static encode_lossy(value: String): u8[]

Returns the code page 437 bytes of value, with ? for each character the code page lacks.

Parameters

• value — the text to encode

Returns

• a new array of one byte per code point

decode

static decode(bytes: u8[]): String

Decodes code page 437 bytes. Every byte is a character, so it always succeeds.

Parameters

• bytes — the bytes to decode

Returns

• the text