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/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* 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; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "interpreter.h"
#include "binarybuffer.h"
#include <stdlib.h>
#include <string.h>
var_t *variables = NULL;
int handle_var_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_field_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_script_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int interpreter_register_commands(struct command_context_s *cmd_ctx)
{
register_command(cmd_ctx, NULL, "var", handle_var_command,
COMMAND_ANY, "allocate, display or delete variable <name> [num_fields|'del'] [size1] ...");
register_command(cmd_ctx, NULL, "field", handle_field_command,
COMMAND_ANY, "display/modify variable field <var> <field> [value|'flip']");
register_command(cmd_ctx, NULL, "script", handle_script_command,
COMMAND_ANY, "execute commands from <file>");
return ERROR_OK;
}
var_t* get_var_by_num(int num)
{
int count = 0;
var_t *var = variables;
if (var)
{
if (num == count)
return var;
while (var->next)
{
var = var->next;
count++;
if (num == count)
return var;
}
}
return NULL;
}
var_t* get_var_by_name(char *name)
{
var_t *var = variables;
if (var)
{
if (strcmp(var->name, name) == 0)
return var;
while (var->next)
{
var = var->next;
if (strcmp(var->name, name) == 0)
return var;
}
}
return NULL;
}
var_t* get_var_by_namenum(char *namenum)
{
if ((namenum[0] >= '0') && (namenum[0] <= '9'))
return get_var_by_num(strtol(namenum, NULL, 0));
else
return get_var_by_name(namenum);
}
int field_le_to_host(u8 *buffer, void *priv)
{
var_field_t *field = priv;
field->value = buf_get_u32(buffer, 0, field->num_bits);
return ERROR_OK;
}
int handle_var_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
var_t **last_var_p = &variables;
int i;
if (argc >= 2)
{
while (*last_var_p)
{
if (strcmp((*last_var_p)->name, args[0]) == 0)
{
if (strcmp(args[1], "del") == 0)
{
var_t *next = (*last_var_p)->next;
free ((*last_var_p)->fields);
free (*last_var_p);
*last_var_p = next;
command_print(cmd_ctx, "variable %s deleted", args[0]);
}
else
command_print(cmd_ctx, "variable of that name already exists");
return ERROR_OK;
}
last_var_p = &((*last_var_p)->next);
}
if ((args[0][0] >= 0) && (args[0][0] <= 9))
{
command_print(cmd_ctx, "invalid name specified (first character may not be a number)");
return ERROR_OK;
}
*last_var_p = malloc(sizeof(var_t));
(*last_var_p)->name = strdup(args[0]);
(*last_var_p)->num_fields = argc - 1;
(*last_var_p)->next = NULL;
(*last_var_p)->fields = malloc(sizeof(var_field_t) * (*last_var_p)->num_fields);
for (i = 0; i < (*last_var_p)->num_fields; i++)
{
(*last_var_p)->fields[i].num_bits = strtol(args[1+i], NULL, 0);
(*last_var_p)->fields[i].value = 0x0;
}
return ERROR_OK;
}
if (argc == 1)
{
var_t *var = get_var_by_namenum(args[0]);
if (var)
{
int i;
command_print(cmd_ctx, "%s (%i fields):", var->name, var->num_fields);
for (i = 0; i < (var->num_fields); i++)
{
command_print(cmd_ctx, "0x%x (/%i)", var->fields[i].value, var->fields[i].num_bits);
}
}
else
{
command_print(cmd_ctx, "variable %s doesn't exist", args[0]);
}
}
if (argc == 0)
{
var_t *var = variables;
int count = 0;
while (var)
{
command_print(cmd_ctx, "%i: %s (%i fields)", count, var->name, var->num_fields);
var = var->next;
count++;
}
}
return ERROR_OK;
}
int handle_field_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if (argc < 2)
command_print(cmd_ctx, "usage: field <var> <field> [value|'flip']");
if (argc >= 2)
{
var_t *var = get_var_by_namenum(args[0]);
int field_num = strtol(args[1], NULL, 0);
if (!var)
{
command_print(cmd_ctx, "variable %s doesn't exist", args[0]);
return ERROR_OK;
}
if (field_num >= var->num_fields)
command_print(cmd_ctx, "variable field %i is out of bounds (max. %i)", field_num, var->num_fields - 1);
if ((var) && (field_num < var->num_fields))
{
if (argc > 2)
{
if (strcmp(args[2], "flip") == 0)
var->fields[field_num].value = flip_u32(var->fields[field_num].value, var->fields[field_num].num_bits);
else
var->fields[field_num].value = strtoul(args[2], NULL, 0);
}
command_print(cmd_ctx, "%s(%i): 0x%x (/%i)", var->name, field_num, var->fields[field_num].value, var->fields[field_num].num_bits);
}
}
return ERROR_OK;
}
int handle_script_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
FILE *script_file;
int echo;
if (argc != 1)
command_print(cmd_ctx, "usage: script <file>");
script_file = fopen(args[0], "r");
if (!script_file)
{
command_print(cmd_ctx, "couldn't open script file %s", args[0]);
return ERROR_OK;
}
echo = cmd_ctx->echo;
cmd_ctx->echo = 1;
command_run_file(cmd_ctx, script_file, COMMAND_EXEC);
cmd_ctx->echo = echo;
fclose(script_file);
return ERROR_OK;
}
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