132 lines
2.8 KiB
C
132 lines
2.8 KiB
C
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#ifndef lint
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static char sccsid[] = "@(#)menu.c 1.1 94/10/31";
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#endif
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/*
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* Copyright (c) 1987 by Sun Microsystems, Inc.
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*/
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/*
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* This file contains routines relating to running the menus.
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*/
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#include "global.h"
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#include "menu.h"
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#include "misc.h"
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/*
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* This routine takes a menu struct and concatenates the
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* command names into an array of strings describing the menu.
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* All menus have a 'quit' command at the bottom to exit the menu.
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*/
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char **
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create_menu_list(menu)
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struct menu_item *menu;
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{
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register struct menu_item *mptr;
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register char **cpptr, *list;
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int i;
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/*
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* Count the number of commands in the menu and allocate space
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* for the array of pointers.
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*/
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for (mptr = menu; mptr->menu_cmd != NULL; mptr++)
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;
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i = (mptr - menu + 2) * sizeof (char *);
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list = zalloc(i);
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cpptr = (char **)list;
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/*
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* Fill in the array with the names of the menu commands.
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*/
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for (mptr = menu; mptr->menu_cmd != NULL; mptr++)
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*cpptr++ = mptr->menu_cmd;
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/*
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* Add the 'quit' command to the end.
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*/
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*cpptr = "quit";
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return ((char **)list);
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}
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/*
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* This routine takes a menu list created by the above routine and
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* prints it nicely on the screen.
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*/
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display_menu_list(list)
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char **list;
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{
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register char **str;
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for (str = list; *str != NULL; str++)
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printf(" %s\n", *str);
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}
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/*
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* This routine 'runs' a menu. It repeatedly requests a command and
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* executes the command chosen. It exits when the 'quit' command is
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* executed.
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*/
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run_menu(menu, title, prompt, display_flag)
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struct menu_item *menu;
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char *title;
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char *prompt;
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int display_flag;
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{
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char **list;
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int i;
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struct env env;
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#ifdef lint
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display_flag = display_flag;
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#endif lint
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/*
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* Create the menu list and display it.
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*/
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list = create_menu_list(menu);
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printf("\n\n%s MENU:\n", title);
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display_menu_list(list);
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/*
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* Save the environment so a ctrl-C out of a command lands here.
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*/
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saveenv(env);
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for (;;) {
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/*
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* Ask the user which command they want to run.
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*/
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i = input(FIO_MSTR, prompt, '>', (char *)list,
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(int *)NULL, CMD_INPUT);
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/*
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* If they choose 'quit', the party's over.
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*/
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if (menu[i].menu_cmd == NULL)
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break;
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/*
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* Mark the saved environment active so the user can now
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* do a ctrl-C to get out of the command.
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*/
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useenv();
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/*
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* Run the command. If it returns an error and we are
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* running out of a command file, the party's really over.
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*/
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if ((*menu[i].menu_func)() && option_f)
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fullabort();
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/*
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* Mark the saved environment inactive so ctrl-C doesn't
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* work at the menu itself.
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*/
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unuseenv();
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if (cur_menu != last_menu) {
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last_menu = cur_menu;
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printf("\n\n%s MENU:\n", title);
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display_menu_list(list);
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}
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}
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/*
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* Clean up the environment stack and throw away the menu list.
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*/
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clearenv();
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destroy_data((char *)list);
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}
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