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Diffstat (limited to 'src/helper/interpreter.c')
| -rw-r--r-- | src/helper/interpreter.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/src/helper/interpreter.c b/src/helper/interpreter.c new file mode 100644 index 00000000..7e88263b --- /dev/null +++ b/src/helper/interpreter.c @@ -0,0 +1,237 @@ +/*************************************************************************** + * 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; +} |