From: Heinrich Schuchardt Date: Mon, 18 Jan 2021 20:06:03 +0000 (+0100) Subject: doc: move README.menu to HTML documentation X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=12316967ad5355798a85739a27afbdde35e3c042;p=u-boot.git doc: move README.menu to HTML documentation Convert README.menu to reStructured text and add it to the HTML documentation. Signed-off-by: Heinrich Schuchardt --- diff --git a/doc/README.menu b/doc/README.menu deleted file mode 100644 index 0f3d741605..0000000000 --- a/doc/README.menu +++ /dev/null @@ -1,124 +0,0 @@ -SPDX-License-Identifier: GPL-2.0+ -/* - * Copyright 2010-2011 Calxeda, Inc. - */ - -U-Boot provides a set of interfaces for creating and using simple, text -based menus. Menus are displayed as lists of labeled entries on the -console, and an entry can be selected by entering its label. - -To use the menu code, enable CONFIG_MENU, and include "menu.h" where -the interfaces should be available. - -Menus are composed of items. Each item has a key used to identify it in -the menu, and an opaque pointer to data controlled by the consumer. - -If you want to show a menu, instead starting the shell, define -CONFIG_AUTOBOOT_MENU_SHOW. You have to code the int menu_show(int bootdelay) -function, which handle your menu. This function returns the remaining -bootdelay. - -Interfaces ----------- -#include "menu.h" - -/* - * Consumers of the menu interfaces will use a struct menu * as the - * handle for a menu. struct menu is only fully defined in menu.c, - * preventing consumers of the menu interfaces from accessing its - * contents directly. - */ -struct menu; - -/* - * NOTE: See comments in common/menu.c for more detailed documentation on - * these interfaces. - */ - -/* - * menu_create() - Creates a menu handle with default settings - */ -struct menu *menu_create(char *title, int timeout, int prompt, - void (*item_data_print)(void *), - char *(*item_choice)(void *), - void *item_choice_data); - -/* - * menu_item_add() - Adds or replaces a menu item - */ -int menu_item_add(struct menu *m, char *item_key, void *item_data); - -/* - * menu_default_set() - Sets the default choice for the menu - */ -int menu_default_set(struct menu *m, char *item_key); - -/* - * menu_default_choice() - Set *choice to point to the default item's data - */ -int menu_default_choice(struct menu *m, void **choice); - -/* - * menu_get_choice() - Returns the user's selected menu entry, or the - * default if the menu is set to not prompt or the timeout expires. - */ -int menu_get_choice(struct menu *m, void **choice); - -/* - * menu_destroy() - frees the memory used by a menu and its items. - */ -int menu_destroy(struct menu *m); - -/* - * menu_display_statusline(struct menu *m); - * shows a statusline for every menu_display call. - */ -void menu_display_statusline(struct menu *m); - -Example Code ------------- -This example creates a menu that always prompts, and allows the user -to pick from a list of tools. The item key and data are the same. - -#include "menu.h" - -char *tools[] = { - "Hammer", - "Screwdriver", - "Nail gun", - NULL -}; - -char *pick_a_tool(void) -{ - struct menu *m; - int i; - char *tool = NULL; - - m = menu_create("Tools", 0, 1, NULL); - - for(i = 0; tools[i]; i++) { - if (menu_item_add(m, tools[i], tools[i]) != 1) { - printf("failed to add item!"); - menu_destroy(m); - return NULL; - } - } - - if (menu_get_choice(m, (void **)&tool) != 1) - printf("Problem picking tool!\n"); - - menu_destroy(m); - - return tool; -} - -void caller(void) -{ - char *tool = pick_a_tool(); - - if (tool) { - printf("picked a tool: %s\n", tool); - use_tool(tool); - } -} diff --git a/doc/develop/index.rst b/doc/develop/index.rst index 83eb1307ed..beaa64d8d9 100644 --- a/doc/develop/index.rst +++ b/doc/develop/index.rst @@ -12,6 +12,7 @@ Implementation commands global_data logging + menus Debugging --------- diff --git a/doc/develop/menus.rst b/doc/develop/menus.rst new file mode 100644 index 0000000000..dda8f963fb --- /dev/null +++ b/doc/develop/menus.rst @@ -0,0 +1,131 @@ +.. SPDX-License-Identifier: GPL-2.0+ +.. Copyright 2010-2011 Calxeda, Inc. + +Menus +===== + +U-Boot provides a set of interfaces for creating and using simple, text +based menus. Menus are displayed as lists of labeled entries on the +console, and an entry can be selected by entering its label. + +To use the menu code, enable CONFIG_MENU, and include "menu.h" where +the interfaces should be available. + +Menus are composed of items. Each item has a key used to identify it in +the menu, and an opaque pointer to data controlled by the consumer. + +If you want to show a menu, instead starting the shell, define +CONFIG_AUTOBOOT_MENU_SHOW. You have to code the int menu_show(int bootdelay) +function, which handle your menu. This function returns the remaining +bootdelay. + +Interfaces +---------- + +.. code-block:: c + + #include "menu.h" + + /* + * Consumers of the menu interfaces will use a struct menu * as the + * handle for a menu. struct menu is only fully defined in menu.c, + * preventing consumers of the menu interfaces from accessing its + * contents directly. + */ + struct menu; + + /* + * NOTE: See comments in common/menu.c for more detailed documentation on + * these interfaces. + */ + + /* + * menu_create() - Creates a menu handle with default settings + */ + struct menu *menu_create(char *title, int timeout, int prompt, + void (*item_data_print)(void *), + char *(*item_choice)(void *), + void *item_choice_data); + + /* + * menu_item_add() - Adds or replaces a menu item + */ + int menu_item_add(struct menu *m, char *item_key, void *item_data); + + /* + * menu_default_set() - Sets the default choice for the menu + */ + int menu_default_set(struct menu *m, char *item_key); + + /* + * menu_default_choice() - Set *choice to point to the default item's data + */ + int menu_default_choice(struct menu *m, void **choice); + + /* + * menu_get_choice() - Returns the user's selected menu entry, or the + * default if the menu is set to not prompt or the timeout expires. + */ + int menu_get_choice(struct menu *m, void **choice); + + /* + * menu_destroy() - frees the memory used by a menu and its items. + */ + int menu_destroy(struct menu *m); + + /* + * menu_display_statusline(struct menu *m); + * shows a statusline for every menu_display call. + */ + void menu_display_statusline(struct menu *m); + +Example Code +------------ + +This example creates a menu that always prompts, and allows the user +to pick from a list of tools. The item key and data are the same. + +.. code-block:: c + + #include "menu.h" + + char *tools[] = { + "Hammer", + "Screwdriver", + "Nail gun", + NULL + }; + + char *pick_a_tool(void) + { + struct menu *m; + int i; + char *tool = NULL; + + m = menu_create("Tools", 0, 1, NULL); + + for(i = 0; tools[i]; i++) { + if (menu_item_add(m, tools[i], tools[i]) != 1) { + printf("failed to add item!"); + menu_destroy(m); + return NULL; + } + } + + if (menu_get_choice(m, (void **)&tool) != 1) + printf("Problem picking tool!\n"); + + menu_destroy(m); + + return tool; + } + + void caller(void) + { + char *tool = pick_a_tool(); + + if (tool) { + printf("picked a tool: %s\n", tool); + use_tool(tool); + } + }