tweaks: optimize for byte-range characters, and shorten some comments
parent
f80ce71d13
commit
cc6d1d59a6
18
src/winio.c
18
src/winio.c
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@ -930,9 +930,14 @@ int parse_kbinput(WINDOW *win)
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}
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}
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if (escapes == 0) {
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if (escapes == 0) {
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/* Most key codes in byte range cannot be special keys. */
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if (keycode <= 0xFF && keycode != '\t' && keycode != DEL_CODE)
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return keycode;
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else
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retval = keycode;
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retval = keycode;
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} else if (escapes == 1) {
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} else if (escapes == 1) {
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escapes = 0;
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escapes = 0;
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/* Key codes out of ASCII range cannot form escape sequences. */
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if (keycode >= 0x80) {
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if (keycode >= 0x80) {
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#ifndef NANO_TINY
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#ifndef NANO_TINY
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if (keycode == KEY_BACKSPACE)
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if (keycode == KEY_BACKSPACE)
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@ -948,8 +953,6 @@ int parse_kbinput(WINDOW *win)
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meta_key = TRUE;
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meta_key = TRUE;
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retval = (shifted_metas) ? keycode : tolower(keycode);
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retval = (shifted_metas) ? keycode : tolower(keycode);
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} else
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} else
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/* One escape followed by a non-escape, and there
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* are more codes waiting: escape sequence mode. */
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retval = parse_escape_sequence(keycode);
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retval = parse_escape_sequence(keycode);
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} else {
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} else {
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escapes = 0;
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escapes = 0;
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@ -979,21 +982,18 @@ int parse_kbinput(WINDOW *win)
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meta_key = TRUE;
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meta_key = TRUE;
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} else if ('0' <= keycode && (keycode <= '2' ||
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} else if ('0' <= keycode && (keycode <= '2' ||
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(keycode <= '9' && digit_count > 0))) {
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(keycode <= '9' && digit_count > 0))) {
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/* Two escapes followed by one digit, and no other codes
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/* Two escapes followed by one digit: byte sequence mode. */
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* are waiting: byte sequence mode. If the range of the
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* sequence of digits is limited to 2XX, interpret it. */
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int byte = assemble_byte_code(keycode);
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int byte = assemble_byte_code(keycode);
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/* If the decimal byte value is not yet complete,
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/* If the decimal byte value is not yet complete, return nothing. */
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* return nothing; otherwise convert it and put the
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* obtained byte(s) back into the input buffer. */
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if (byte == PROCEED) {
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if (byte == PROCEED) {
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escapes = 2;
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escapes = 2;
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return ERR;
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return ERR;
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}
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}
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#ifdef ENABLE_UTF8
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#ifdef ENABLE_UTF8
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else if (byte > 0x7F && using_utf8()) {
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else if (byte > 0x7F && using_utf8()) {
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/* Convert the code to the corresponding Unicode. */
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/* Convert the code to the corresponding Unicode, and
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* put the second byte back into the keyboard buffer. */
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if (byte < 0xC0) {
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if (byte < 0xC0) {
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put_back((unsigned char)byte);
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put_back((unsigned char)byte);
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return 0xC2;
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return 0xC2;
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