nonbinary.computer
forked from
oppi.li/claude-code
source dump of claude code
oppi.li
1/**
2 * ANSI Control Characters and Escape Sequence Introducers
3 *
4 * Based on ECMA-48 / ANSI X3.64 standards.
5 */
6
7/**
8 * C0 (7-bit) control characters
9 */
10export const C0 = {
11 NUL: 0x00,
12 SOH: 0x01,
13 STX: 0x02,
14 ETX: 0x03,
15 EOT: 0x04,
16 ENQ: 0x05,
17 ACK: 0x06,
18 BEL: 0x07,
19 BS: 0x08,
20 HT: 0x09,
21 LF: 0x0a,
22 VT: 0x0b,
23 FF: 0x0c,
24 CR: 0x0d,
25 SO: 0x0e,
26 SI: 0x0f,
27 DLE: 0x10,
28 DC1: 0x11,
29 DC2: 0x12,
30 DC3: 0x13,
31 DC4: 0x14,
32 NAK: 0x15,
33 SYN: 0x16,
34 ETB: 0x17,
35 CAN: 0x18,
36 EM: 0x19,
37 SUB: 0x1a,
38 ESC: 0x1b,
39 FS: 0x1c,
40 GS: 0x1d,
41 RS: 0x1e,
42 US: 0x1f,
43 DEL: 0x7f,
44} as const
45
46// String constants for output generation
47export const ESC = '\x1b'
48export const BEL = '\x07'
49export const SEP = ';'
50
51/**
52 * Escape sequence type introducers (byte after ESC)
53 */
54export const ESC_TYPE = {
55 CSI: 0x5b, // [ - Control Sequence Introducer
56 OSC: 0x5d, // ] - Operating System Command
57 DCS: 0x50, // P - Device Control String
58 APC: 0x5f, // _ - Application Program Command
59 PM: 0x5e, // ^ - Privacy Message
60 SOS: 0x58, // X - Start of String
61 ST: 0x5c, // \ - String Terminator
62} as const
63
64/** Check if a byte is a C0 control character */
65export function isC0(byte: number): boolean {
66 return byte < 0x20 || byte === 0x7f
67}
68
69/**
70 * Check if a byte is an ESC sequence final byte (0-9, :, ;, <, =, >, ?, @ through ~)
71 * ESC sequences have a wider final byte range than CSI
72 */
73export function isEscFinal(byte: number): boolean {
74 return byte >= 0x30 && byte <= 0x7e
75}