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-rw-r--r--com32/libutil/include/minmax.h44
-rw-r--r--com32/modules/menu.c240
2 files changed, 284 insertions, 0 deletions
diff --git a/com32/libutil/include/minmax.h b/com32/libutil/include/minmax.h
new file mode 100644
index 00000000..319db164
--- /dev/null
+++ b/com32/libutil/include/minmax.h
@@ -0,0 +1,44 @@
+#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.
+ *
+ * ----------------------------------------------------------------------- */
+
+#ifndef _MINMAX_H
+#define _MINMAX_H
+
+/*
+ * minmax.h: Type-independent safe min/max macros
+ */
+
+#define min(x,y) ({ __typeof(x) xx = (x); \
+ __typeof(y) yy = (y); \
+ xx < yy ? xx : yy; })
+#define max(x,y) ({ __typeof(x) xx = (x); \
+ __typeof(y) yy = (y); \
+ xx > yy ? xx : yy; })
+
+#endif /* _MINMAX_H */
+
diff --git a/com32/modules/menu.c b/com32/modules/menu.c
new file mode 100644
index 00000000..357952c9
--- /dev/null
+++ b/com32/modules/menu.c
@@ -0,0 +1,240 @@
+#ident "$Id$"
+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 2004 H. Peter Anvin - All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, Inc., 53 Temple Place Ste 330,
+ * Boston MA 02111-1307, USA; either version 2 of the License, or
+ * (at your option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * menu.c
+ *
+ * Simple menu system which displays a list and allows the user to select
+ * a command line and/or edit it.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <consoles.h>
+#include <getkey.h>
+#include <minmax.h>
+#ifdef __COM32__
+#include <com32.h>
+#endif
+
+struct menu_entry {
+ const char *displayname;
+ const char *cmdline;
+};
+
+struct menu_entry menu_entries[] =
+ {
+ { "Test", "vmlinux root=/dev/zero" },
+ { "this", "chain.c32 hd0 2" },
+ { "entry 3", "runentry val=3" },
+ { "entry 4", "runentry val=3" },
+ { "entry 5", "runentry val=3" },
+ { "entry 6", "runentry val=3" },
+ { "entry 7", "runentry val=3" },
+ { "entry 8", "runentry val=3" },
+ { "entry 9", "runentry val=3" },
+ { "entry 10", "runentry val=10" },
+ { "entry 11", "runentry val=11" },
+ { "entry 12", "runentry val=12" },
+ { "entry 13", "runentry val=13" },
+ { "entry 14", "runentry val=14" },
+ { "entry 15", "runentry val=15" },
+ { "entry 16", "runentry val=16" },
+ { "entry 17", "runentry val=17" },
+ { "entry 18", "runentry val=18" },
+ { "entry 19", "runentry val=19" },
+ { "entry 20", "runentry val=20" },
+ };
+
+int nentries = sizeof menu_entries / sizeof(struct menu_entry);
+int defentry = 0;
+int allowedit = 1; /* Allow edits of the command line */
+
+char *menu_title = "This is the menu title";
+
+struct menu_attrib {
+ const char *border; /* Border area */
+ const char *title; /* Title bar */
+ const char *unsel; /* Unselected menu item */
+ const char *sel; /* Selected */
+ const char *tabmsg; /* Press [Tab] message */
+ const char *cmdmark; /* Command line marker */
+ const char *cmdline; /* Command line */
+ const char *screen; /* Rest of the screen */
+};
+
+const struct menu_attrib default_attrib = {
+ .border = "\033[0;30;44m",
+ .title = "\033[1;36;44m",
+ .unsel = "\033[0;37;44m",
+ .sel = "\033[0;30;47m",
+ .tabmsg = "\033[0;31;40m",
+ .cmdmark = "\033[1;36;40m",
+ .cmdline = "\033[0;37;40m",
+ .screen = "\033[0;37;40m",
+};
+
+const struct menu_attrib *menu_attrib = &default_attrib;
+
+#define WIDTH 80
+#define MARGIN 10
+#define MENU_ROWS 12
+#define TABMSG_ROW 18
+#define CMDLINE_ROW 20
+#define END_ROW 24
+
+char *pad_line(const char *text, int align, int width)
+{
+ static char buffer[256];
+ int n, p;
+
+ if ( width >= (int) sizeof buffer )
+ return NULL; /* Can't do it */
+
+ n = strlen(text);
+ if ( n >= width )
+ n = width;
+
+ memset(buffer, ' ', width);
+ buffer[width] = 0;
+ p = ((width-n)*align)>>1;
+ memcpy(buffer+p, text, n);
+
+ return buffer;
+}
+
+void draw_menu(int sel, int top)
+{
+ int x, y;
+
+ printf("\033[1;%dH%s\311", MARGIN+1, menu_attrib->border);
+ for ( x = 2 ; x <= WIDTH-2*MARGIN-1 ; x++ )
+ putchar('\315');
+ putchar('\273');
+
+ printf("\033[2;%dH\272%s %s %s\272",
+ MARGIN+1,
+ menu_attrib->title,
+ pad_line(menu_title, 1, WIDTH-2*MARGIN-4),
+ menu_attrib->border);
+
+ printf("\033[3;%dH\307", MARGIN+1);
+ for ( x = 2 ; x <= WIDTH-2*MARGIN-1 ; x++ )
+ putchar('\304');
+ putchar('\266');
+
+ for ( y = 4 ; y < 4+MENU_ROWS ; y++ ) {
+ int i = (y-4)+top;
+ const char *txt = (i >= nentries) ? "" : menu_entries[i].displayname;
+
+ printf("\033[%d;%dH\272%s %s %s\272",
+ y, MARGIN+1,
+ (i == sel) ? menu_attrib->sel : menu_attrib->unsel,
+ pad_line(txt, 0, WIDTH-2*MARGIN-4),
+ menu_attrib->border);
+ }
+
+ printf("\033[%d;%dH\310", y, MARGIN+1);
+ for ( x = 2 ; x <= WIDTH-2*MARGIN-1 ; x++ )
+ putchar('\315');
+ putchar('\274');
+
+ if ( allowedit )
+ printf("%s\033[%d;1H%s", menu_attrib->tabmsg, TABMSG_ROW,
+ pad_line("Press [Tab] to edit options", 1, WIDTH));
+
+ printf("\033[%d;1H%s> %s%s\033[%d;1H",
+ CMDLINE_ROW, menu_attrib->cmdmark,
+ menu_attrib->cmdline,
+ pad_line(menu_entries[sel].cmdline, 0, 255),
+ END_ROW);
+}
+
+const char *run_menu(void)
+{
+ int key;
+ int done = 0;
+ int entry = defentry;
+ int top = 0;
+
+ /* Start with a clear screen */
+ printf("%s\033[2J", menu_attrib->screen);
+
+ while ( !done ) {
+ if ( top < entry-MENU_ROWS+1 )
+ top = max(entry-MENU_ROWS+1, 0);
+ else if ( top > entry )
+ top = min(entry, nentries-MENU_ROWS+1);
+
+ draw_menu(entry, top);
+
+ gkey:
+ key = get_key(stdin);
+ switch ( key ) {
+ case '\r':
+ done = 1;
+ break;
+ case KEY_UP:
+ if ( entry > 0 )
+ entry--;
+ break;
+ case KEY_DOWN:
+ if ( entry < nentries-1 )
+ entry++;
+ break;
+ case '\003': /* Ctrl-C */
+ case '\033': /* Esc */
+ exit(1); /* FIX THIS... do something sane here */
+ default:
+ printf("[%04x]", key);
+ goto gkey;
+ }
+ }
+
+ printf("\033[%d;1H\033[0m", END_ROW);
+ return menu_entries[defentry].cmdline;
+}
+
+
+void __attribute__((noreturn)) execute(const char *cmdline)
+{
+#ifdef __COM32__
+ static com32sys_t ireg;
+
+ strcpy(__com32.cs_bounce, cmdline);
+ ireg.eax.w[0] = 0x0003; /* Run command */
+ ireg.ebx.w[0] = OFFS(__com32.cs_bounce);
+ ireg.es = SEG(__com32.cs_bounce);
+ __intcall(0x22, &ireg, NULL);
+ exit(255); /* Shouldn't return */
+#else
+ /* For testing... */
+ printf("\n>>> %s\n", cmdline);
+ exit(0);
+#endif
+}
+
+int main(void)
+{
+ const char *cmdline;
+
+ console_ansi_raw();
+
+ fputs("\033%@\033(U", stdout); /* Enable CP 437 graphics on a real console */
+
+ cmdline = run_menu();
+ execute(cmdline);
+}
+
+
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