Function linenoiseReadEscapeSequence

tools/shell/linenoise.cpp:1089–1124

}

uint64_t linenoiseReadEscapeSequence(int ifd, char seq[]) {
    if (read(ifd, seq, 1) == -1) {
        return 0;
    }
    switch (seq[0]) {
    case 'O':
    case '[':
        // these characters have multiple bytes following them
        break;
    default:
        return 1;
    }
    if (read(ifd, seq + 1, 1) == -1) {
        return 0;
    }

    if (seq[0] != '[') {
        return 2;
    }
    if (seq[1] < '0' || seq[1] > '9') {
        return 2;
    }
    /* Extended escape, read additional byte. */
    if (read(ifd, seq + 2, 1) == -1) {
        return 0;
    }
    if (seq[2] == ';') {
        // read 2 extra bytes
        if (read(ifd, seq + 3, 2) == -1) {
            return 0;
        }
        return 5;
    } else {
        return 3;
    }
}

EscapeSequence linenoiseReadEscapeSequence(int ifd) {
    char seq[5];