🎯 Use case
This file lives under “ink/”, which covers Ink terminal UI (layouts, TTY IO, keyboard, renderer components). On the API surface it exposes C0, ESC, BEL, SEP, and ESC_TYPE (and more) — mainly types, interfaces, or factory objects. What the file header says: ANSI Control Characters and Escape Sequence Introducers Based on ECMA-48 / ANSI X3.64 standards.
Generated from folder role, exports, dependency roots, and inline comments — not hand-reviewed for every path.
🧠 Inline summary
ANSI Control Characters and Escape Sequence Introducers Based on ECMA-48 / ANSI X3.64 standards.
📤 Exports (heuristic)
C0ESCBELSEPESC_TYPEisC0isEscFinal
🖥️ Source preview
/**
* ANSI Control Characters and Escape Sequence Introducers
*
* Based on ECMA-48 / ANSI X3.64 standards.
*/
/**
* C0 (7-bit) control characters
*/
export const C0 = {
NUL: 0x00,
SOH: 0x01,
STX: 0x02,
ETX: 0x03,
EOT: 0x04,
ENQ: 0x05,
ACK: 0x06,
BEL: 0x07,
BS: 0x08,
HT: 0x09,
LF: 0x0a,
VT: 0x0b,
FF: 0x0c,
CR: 0x0d,
SO: 0x0e,
SI: 0x0f,
DLE: 0x10,
DC1: 0x11,
DC2: 0x12,
DC3: 0x13,
DC4: 0x14,
NAK: 0x15,
SYN: 0x16,
ETB: 0x17,
CAN: 0x18,
EM: 0x19,
SUB: 0x1a,
ESC: 0x1b,
FS: 0x1c,
GS: 0x1d,
RS: 0x1e,
US: 0x1f,
DEL: 0x7f,
} as const
// String constants for output generation
export const ESC = '\x1b'
export const BEL = '\x07'
export const SEP = ';'
/**
* Escape sequence type introducers (byte after ESC)
*/
export const ESC_TYPE = {
CSI: 0x5b, // [ - Control Sequence Introducer
OSC: 0x5d, // ] - Operating System Command
DCS: 0x50, // P - Device Control String
APC: 0x5f, // _ - Application Program Command
PM: 0x5e, // ^ - Privacy Message
SOS: 0x58, // X - Start of String
ST: 0x5c, // \ - String Terminator
} as const
/** Check if a byte is a C0 control character */
export function isC0(byte: number): boolean {
return byte < 0x20 || byte === 0x7f
}
/**
* Check if a byte is an ESC sequence final byte (0-9, :, ;, <, =, >, ?, @ through ~)
* ESC sequences have a wider final byte range than CSI
*/
export function isEscFinal(byte: number): boolean {
return byte >= 0x30 && byte <= 0x7e
}