static void ascii_printable_to_symbol(wchar_t *buf, int buf_len, wchar_t wc, bool bind_friendly) {
if (bind_friendly && must_escape(wc)) {
std::swprintf(buf, buf_len, L"\\%c", wc);
} else {
std::swprintf(buf, buf_len, L"%c", wc);
}
}
static char *char_to_symbol(wchar_t wc, bool bind_friendly) {
static char buf[128];
if (wc < ' ') {
// ASCII control character.
if (ctrl_symbolic_names[wc]) {
if (bind_friendly) {
snprintf(buf, sizeof(buf), "%s", ctrl_symbolic_names[wc]);
} else {
snprintf(buf, sizeof(buf), "\\c%c (or %s)", wc + 64, ctrl_symbolic_names[wc]);
}
} else {
snprintf(buf, sizeof(buf), "\\c%c", wc + 64);
}
} else if (wc == ' ') {
// The "space" character.
if (bind_friendly) {
snprintf(buf, sizeof(buf), "\\x%X", wc);
} else {
snprintf(buf, sizeof(buf), "\\x%X (aka \"space\")", wc);
}
} else if (wc == 0x7F) {
// The "del" character.
if (bind_friendly) {
snprintf(buf, sizeof(buf), "\\x%X", wc);
} else {
snprintf(buf, sizeof(buf), "\\x%X (aka \"del\")", wc);
}
} else if (wc < 0x80) {
// ASCII characters that are not control characters.
if (bind_friendly && must_escape(wc)) {
snprintf(buf, sizeof(buf), "\\%c", wc);
} else {
snprintf(buf, sizeof(buf), "%c", wc);
}
} else if (wc <= 0xFFFF) {
snprintf(buf, sizeof(buf), "\\u%04X", wc);
} else {
snprintf(buf, sizeof(buf), "\\U%06X", wc);
}
return buf;
}