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Help command prints a sorted multi-column list of commands

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Signed-off-by: Randall Spangler <rspangler@chromium.org>

BUG=none
TEST=type 'help' from console

Change-Id: If88610f35337243ca2550de2851bd1924083344d
This commit is contained in:
Randall Spangler
2012-01-24 10:31:20 -08:00
parent 431622d0b9
commit 8c56cc4fa7
1 changed files with 25 additions and 8 deletions
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33
common/console.c
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@@ -1,4 +1,4 @@
/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
@@ -15,11 +15,10 @@
#define PROMPT "> "
/* Xonsole commands are described in a special section */
/* Console commands are described in a special section */
extern const struct console_command __cmds[];
extern const struct console_command __cmds_end[];
void console_has_input(void)
{
/* Wake up the console task */
@@ -151,17 +150,35 @@ void console_task(void)
static int command_help(int argc, char **argv)
{
const struct console_command *cmd;
const int ncmds = ((uint32_t)__cmds_end - (uint32_t)__cmds) /
sizeof(struct console_command);
const char *prev = " ";
int i;
uart_puts("Known commands:\n");
uart_puts("Known commands:");
for (cmd = __cmds; cmd < __cmds_end; cmd++) {
uart_printf(" %s\n", cmd->name);
/* Sort the commands by name */
for (i = 0; i < ncmds; i++) {
const char *next = "zzzz";
if (!(i % 5))
uart_puts("\n ");
/* Find the next command */
for (cmd = __cmds; cmd < __cmds_end; cmd++) {
if (strcasecmp(prev, cmd->name) < 0 &&
strcasecmp(cmd->name, next) < 0)
next = cmd->name;
}
uart_printf("%-15s", next);
/* Generates enough output to overflow the buffer */
uart_flush_output();
prev = next;
}
uart_puts("'.' repeats the last command.\n");
uart_puts("\n'.' repeats the last command.\n");
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(help, command_help);