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/******************************************************************************
*
* Module Name: dbhistry - debugger HISTORY command
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2017, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acdebug.h"
#define _COMPONENT ACPI_CA_DEBUGGER
ACPI_MODULE_NAME("dbhistry")
#define HI_NO_HISTORY 0
#define HI_RECORD_HISTORY 1
#define HISTORY_SIZE 40
typedef struct history_info {
char *command;
u32 cmd_num;
} HISTORY_INFO;
static HISTORY_INFO acpi_gbl_history_buffer[HISTORY_SIZE];
static u16 acpi_gbl_lo_history = 0;
static u16 acpi_gbl_num_history = 0;
static u16 acpi_gbl_next_history_index = 0;
u32 acpi_gbl_next_cmd_num = 1;
/*******************************************************************************
*
* FUNCTION: acpi_db_add_to_history
*
* PARAMETERS: command_line - Command to add
*
* RETURN: None
*
* DESCRIPTION: Add a command line to the history buffer.
*
******************************************************************************/
void acpi_db_add_to_history(char *command_line)
{
u16 cmd_len;
u16 buffer_len;
/* Put command into the next available slot */
cmd_len = (u16)strlen(command_line);
if (!cmd_len) {
return;
}
if (acpi_gbl_history_buffer[acpi_gbl_next_history_index].command !=
NULL) {
buffer_len =
(u16)
strlen(acpi_gbl_history_buffer[acpi_gbl_next_history_index].
command);
if (cmd_len > buffer_len) {
acpi_os_free(acpi_gbl_history_buffer
[acpi_gbl_next_history_index].command);
acpi_gbl_history_buffer[acpi_gbl_next_history_index].
command = acpi_os_allocate(cmd_len + 1);
}
} else {
acpi_gbl_history_buffer[acpi_gbl_next_history_index].command =
acpi_os_allocate(cmd_len + 1);
}
strcpy(acpi_gbl_history_buffer[acpi_gbl_next_history_index].command,
command_line);
acpi_gbl_history_buffer[acpi_gbl_next_history_index].cmd_num =
acpi_gbl_next_cmd_num;
/* Adjust indexes */
if ((acpi_gbl_num_history == HISTORY_SIZE) &&
(acpi_gbl_next_history_index == acpi_gbl_lo_history)) {
acpi_gbl_lo_history++;
if (acpi_gbl_lo_history >= HISTORY_SIZE) {
acpi_gbl_lo_history = 0;
}
}
acpi_gbl_next_history_index++;
if (acpi_gbl_next_history_index >= HISTORY_SIZE) {
acpi_gbl_next_history_index = 0;
}
acpi_gbl_next_cmd_num++;
if (acpi_gbl_num_history < HISTORY_SIZE) {
acpi_gbl_num_history++;
}
}
/*******************************************************************************
*
* FUNCTION: acpi_db_display_history
*
* PARAMETERS: None
*
* RETURN: None
*
* DESCRIPTION: Display the contents of the history buffer
*
******************************************************************************/
void acpi_db_display_history(void)
{
u32 i;
u16 history_index;
history_index = acpi_gbl_lo_history;
/* Dump entire history buffer */
for (i = 0; i < acpi_gbl_num_history; i++) {
if (acpi_gbl_history_buffer[history_index].command) {
acpi_os_printf("%3ld %s\n",
acpi_gbl_history_buffer[history_index].
cmd_num,
acpi_gbl_history_buffer[history_index].
command);
}
history_index++;
if (history_index >= HISTORY_SIZE) {
history_index = 0;
}
}
}
/*******************************************************************************
*
* FUNCTION: acpi_db_get_from_history
*
* PARAMETERS: command_num_arg - String containing the number of the
* command to be retrieved
*
* RETURN: Pointer to the retrieved command. Null on error.
*
* DESCRIPTION: Get a command from the history buffer
*
******************************************************************************/
char *acpi_db_get_from_history(char *command_num_arg)
{
u32 cmd_num;
if (command_num_arg == NULL) {
cmd_num = acpi_gbl_next_cmd_num - 1;
}
else {
cmd_num = strtoul(command_num_arg, NULL, 0);
}
return (acpi_db_get_history_by_index(cmd_num));
}
/*******************************************************************************
*
* FUNCTION: acpi_db_get_history_by_index
*
* PARAMETERS: cmd_num - Index of the desired history entry.
* Values are 0...(acpi_gbl_next_cmd_num - 1)
*
* RETURN: Pointer to the retrieved command. Null on error.
*
* DESCRIPTION: Get a command from the history buffer
*
******************************************************************************/
char *acpi_db_get_history_by_index(u32 cmd_num)
{
u32 i;
u16 history_index;
/* Search history buffer */
history_index = acpi_gbl_lo_history;
for (i = 0; i < acpi_gbl_num_history; i++) {
if (acpi_gbl_history_buffer[history_index].cmd_num == cmd_num) {
/* Found the command, return it */
return (acpi_gbl_history_buffer[history_index].command);
}
/* History buffer is circular */
history_index++;
if (history_index >= HISTORY_SIZE) {
history_index = 0;
}
}
acpi_os_printf("Invalid history number: %u\n", history_index);
return (NULL);
}
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