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authorhpa <hpa>2004-12-01 02:44:34 +0000
committerhpa <hpa>2004-12-01 02:44:34 +0000
commit70832b411a726871652ec66b33182fdff7270310 (patch)
treef4adc51908868434b444f4f36543eb790b11d855 /com32/libutil/get_key.c
parent01c67843bd343499406dd79c7ab8660bcc4b33c6 (diff)
downloadsyslinux-70832b411a726871652ec66b33182fdff7270310.tar.gz
syslinux-70832b411a726871652ec66b33182fdff7270310.tar.xz
syslinux-70832b411a726871652ec66b33182fdff7270310.zip
Library to decode console codes; demo program
Diffstat (limited to 'com32/libutil/get_key.c')
-rw-r--r--com32/libutil/get_key.c145
1 files changed, 145 insertions, 0 deletions
diff --git a/com32/libutil/get_key.c b/com32/libutil/get_key.c
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+#ident "$Id$"
+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 2004 H. Peter Anvin - All Rights Reserved
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall
+ * be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * get_key.c
+ *
+ * Get a single key, and try to pick apart function key codes.
+ * This doesn't decode anywhere close to all possiblities, but
+ * hopefully is enough to be useful.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <getkey.h>
+
+struct keycode {
+ int code;
+ int seqlen;
+ const unsigned char *seq;
+};
+
+#define MAXLEN 8
+#define CODE(x,y) { x, (sizeof y)-1, y }
+
+static const struct keycode keycodes[] = {
+ /* First, the BIOS combined codes */
+ CODE(KEY_F1, "\0\x3B"),
+ CODE(KEY_F2, "\0\x3C"),
+ CODE(KEY_F3, "\0\x3D"),
+ CODE(KEY_F4, "\0\x3E"),
+ CODE(KEY_F5, "\0\x3F"),
+ CODE(KEY_F6, "\0\x40"),
+ CODE(KEY_F7, "\0\x41"),
+ CODE(KEY_F8, "\0\x42"),
+ CODE(KEY_F9, "\0\x43"),
+ CODE(KEY_F10, "\0\x44"),
+ CODE(KEY_F11, "\0\x85"),
+ CODE(KEY_F12, "\0\x86"),
+
+ CODE(KEY_UP, "\0\x48"),
+ CODE(KEY_DOWN, "\0\x50"),
+ CODE(KEY_LEFT, "\0\x4B"),
+ CODE(KEY_RIGHT,"\0\x4D"),
+ CODE(KEY_PGUP, "\0\x49"),
+ CODE(KEY_PGDN, "\0\x51"),
+ CODE(KEY_HOME, "\0\x47"),
+ CODE(KEY_END, "\0\x4F"),
+ CODE(KEY_INS, "\0\x52"),
+ CODE(KEY_DEL, "\0\x53"),
+
+ /* Now, VT/xterm/Linux codes */
+ CODE(KEY_F1, "\033[[A"),
+ CODE(KEY_F1, "\033OP"),
+ CODE(KEY_F2, "\033[[B"),
+ CODE(KEY_F2, "\033OQ"),
+ CODE(KEY_F3, "\033[[C"),
+ CODE(KEY_F3, "\033OR"),
+ CODE(KEY_F4, "\033[[D"),
+ CODE(KEY_F4, "\033OS"),
+ CODE(KEY_F5, "\033[[E"),
+ CODE(KEY_F5, "\033[15~"),
+ CODE(KEY_F6, "\033[17~"),
+ CODE(KEY_F7, "\033[18~"),
+ CODE(KEY_F8, "\033[19~"),
+ CODE(KEY_F9, "\033[20~"),
+ CODE(KEY_F10, "\033[21~"),
+ CODE(KEY_F11, "\033[23~"),
+ CODE(KEY_F12, "\033[24~"),
+
+ CODE(KEY_UP, "\033[A"),
+ CODE(KEY_DOWN, "\033[B"),
+ CODE(KEY_LEFT, "\033[D"),
+ CODE(KEY_RIGHT,"\033[C"),
+ CODE(KEY_PGUP, "\033[5~"),
+ CODE(KEY_PGDN, "\033[6~"),
+ CODE(KEY_HOME, "\033[1~"),
+ CODE(KEY_HOME, "\033[H"),
+ CODE(KEY_END, "\033[4~"),
+ CODE(KEY_END, "\033[F"),
+ CODE(KEY_INS, "\033[2~"),
+ CODE(KEY_DEL, "\033[3~"),
+};
+#define NCODES ((int)(sizeof keycodes/sizeof(struct keycode)))
+
+int get_key(FILE *f)
+{
+ unsigned char buffer[MAXLEN];
+ int nc, ch, i;
+ const struct keycode *kc;
+ int another;
+
+ nc = 0;
+ do {
+ ch = getc(f);
+
+ if ( ch == EOF )
+ return EOF;
+
+ buffer[nc++] = ch;
+
+ another = 0;
+ for ( i = 0, kc = keycodes ; i < NCODES ; i++, kc++ ) {
+ if ( nc == kc->seqlen && !memcmp(buffer, kc->seq, nc) )
+ return kc->code;
+ else if ( nc < kc->seqlen && !memcmp(buffer, kc->seq, nc) ) {
+ another = 1;
+ break;
+ }
+ }
+ } while ( another );
+
+ /* We got an unrecognized sequence; return the first character */
+ /* We really should remember this and return subsequent characters later */
+ return buffer[0];
+}
+
+
+
+
+