added yours sincerely for files where I feel that I've made non-trivial contributions.
[openocd.git] / src / helper / command.c
index ec7cc6bb7cd2e962d2f9b95ddcd0cc39ae6629eb..119862284d3fa0d3ffbddc06bd30fab7c36d06bf 100644 (file)
@@ -2,6 +2,9 @@
  *   Copyright (C) 2005 by Dominic Rath                                    *
  *   Dominic.Rath@gmx.de                                                   *
  *                                                                         *
+ *   Copyright (C) 2007,2008 Ã˜yvind Harboe                                      *
+ *   oyvind.harboe@zylin.com                                               *
+ *                                                                         *
  *   part of this file is taken from libcli (libcli.sourceforge.net)       *
  *   Copyright (C) David Parrish (david@dparrish.com)                      *
  *                                                                         *
@@ -25,8 +28,9 @@
 #endif
 
 #include "replacements.h"
-
+#include "target.h"
 #include "command.h"
+#include "configuration.h"
 
 #include "log.h"
 #include "time_support.h"
 #include <stdarg.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <errno.h>
 
-void command_print_help_line(command_context_t* context, struct command_s *command, int indent);
+int fast_and_dangerous = 0;
+Jim_Interp *interp = NULL;
 
 int handle_sleep_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int handle_time_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+int handle_fast_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+
+int run_command(command_context_t *context, command_t *c, char *words[], int num_words);
+
+static void tcl_output(void *privData, const char *file, int line, const char *function, const char *string)
+{              
+       Jim_Obj *tclOutput=(Jim_Obj *)privData;
+
+       Jim_AppendString(interp, tclOutput, string, strlen(string));
+}
+
+extern command_context_t *global_cmd_ctx;
+
 
-int build_unique_lengths(command_context_t *context, command_t *commands)
+static int script_command(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
-       command_t *c, *p;
+       /* the private data is stashed in the interp structure */
+       command_t *c;
+       command_context_t *context;
+       int retval;
+       int i;
+       int nwords;
+       char **words;
+
+       target_call_timer_callbacks_now();
+       LOG_USER_N("%s", ""); /* Keep GDB connection alive*/ 
+       
+       c = interp->cmdPrivData;
+       LOG_DEBUG("script_command - %s", c->name);
 
-       /* iterate through all commands */
-       for (c = commands; c; c = c->next)
+       words = malloc(sizeof(char *) * argc);
+       for (i = 0; i < argc; i++)
        {
-               /* find out how many characters are required to uniquely identify a command */
-               for (c->unique_len = 1; c->unique_len <= strlen(c->name); c->unique_len++)
+               int len;
+               const char *w=Jim_GetString(argv[i], &len);
+               if (*w=='#')
                {
-                       int foundmatch = 0;
-                       
-                       /* for every command, see if the current length is enough */
-                       for (p = commands; p; p = p->next)
-                       {
-                               /* ignore the command itself */
-                               if (c == p)
-                                       continue;
-                               
-                               /* compare commands up to the current length */
-                               if (strncmp(p->name, c->name, c->unique_len) == 0)
-                                       foundmatch++;
-                       }
-                       
-                       /* when none of the commands matched, we've found the minimum length required */
-                       if (!foundmatch)
-                               break;
+                       /* hit an end of line comment */
+                       break;
                }
-               
-               /* if the current command has children, build the unique lengths for them */
-               if (c->children)
-                       build_unique_lengths(context, c->children);
+               words[i] = strdup(w);
+               if (words[i] == NULL) 
+               {
+                       return JIM_ERR;
+               }
+               LOG_DEBUG("script_command - %s, argv[%u]=%s", c->name, i, words[i]);
+       }
+       nwords = i;
+
+       /* grab the command context from the associated data */
+       context = Jim_GetAssocData(interp, "context");
+       if (context == NULL)
+       {
+               /* Tcl can invoke commands directly instead of via command_run_line(). This would
+                * happen when the Jim Tcl interpreter is provided by eCos.
+                */
+               context = global_cmd_ctx;
        }
        
-       return ERROR_OK;
-}
+       /* capture log output and return it */
+       Jim_Obj *tclOutput = Jim_NewStringObj(interp, "", 0);
+       /* a garbage collect can happen, so we need a reference count to this object */
+       Jim_IncrRefCount(tclOutput);
+       
+       log_add_callback(tcl_output, tclOutput);
+       
+       retval = run_command(context, c, words, nwords);
+       
+       log_remove_callback(tcl_output, tclOutput);
 
-/* Avoid evaluating this each time we add a command. Reduces overhead from O(n^2) to O(n). 
- * Makes a difference on ARM7 types machines and is not observable on GHz machines.
- */
-static int unique_length_dirty = 1; 
+       /* We dump output into this local variable */
+       Jim_SetResult(interp, tclOutput);
+       Jim_DecrRefCount(interp, tclOutput);
+
+       for (i = 0; i < nwords; i++)
+               free(words[i]);
+       free(words);
+
+       int *return_retval = Jim_GetAssocData(interp, "retval");
+       if (return_retval != NULL)
+       {
+               *return_retval = retval;
+       }
+       
+       return (retval==ERROR_OK)?JIM_OK:JIM_ERR;
+}
 
 command_t* register_command(command_context_t *context, command_t *parent, char *name, int (*handler)(struct command_context_s *context, char* name, char** args, int argc), enum command_mode mode, char *help)
 {
        command_t *c, *p;
-       unique_length_dirty = 1;
        
        if (!context || !name)
                return NULL;
@@ -100,11 +148,8 @@ command_t* register_command(command_context_t *context, command_t *parent, char
        c->children = NULL;
        c->handler = handler;
        c->mode = mode;
-       if (help)
-               c->help = strdup(help);
-       else
-               c->help = NULL;
-       c->unique_len = 0;
+       if (!help)
+               help="";
        c->next = NULL;
        
        /* place command in tree */
@@ -137,15 +182,93 @@ command_t* register_command(command_context_t *context, command_t *parent, char
                }
        }
        
+       /* just a placeholder, no handler */
+       if (c->handler==NULL)
+               return c;
+
+       /* If this is a two level command, e.g. "flash banks", then the
+        * "unknown" proc in startup.tcl must redirect to  this command.
+        * 
+        * "flash banks" is translated by "unknown" to "flash_banks"
+        * if such a proc exists
+        */
+       /* Print help for command */
+       const char *t1="";
+       const char *t2="";
+       const char *t3="";
+       /* maximum of two levels :-) */
+       if (c->parent!=NULL)
+       {
+               t1=c->parent->name;
+               t2="_";
+       }
+       t3=c->name;
+       const char *full_name=alloc_printf("ocd_%s%s%s", t1, t2, t3);
+       Jim_CreateCommand(interp, full_name, script_command, c, NULL);
+       free((void *)full_name);
+       
+       /* we now need to add an overrideable proc */
+       const char *override_name=alloc_printf("proc %s%s%s {args} {eval \"ocd_%s%s%s $args\";return \"\"}", t1, t2, t3, t1, t2, t3);
+       Jim_Eval(interp, override_name);        
+       free((void *)override_name);
+       
+       /* accumulate help text in Tcl helptext list.  */
+    Jim_Obj *helptext=Jim_GetGlobalVariableStr(interp, "ocd_helptext", JIM_ERRMSG);
+    if (Jim_IsShared(helptext))
+        helptext = Jim_DuplicateObj(interp, helptext);
+       Jim_Obj *cmd_entry=Jim_NewListObj(interp, NULL, 0);
+       
+       Jim_Obj *cmd_list=Jim_NewListObj(interp, NULL, 0);
+
+       /* maximum of two levels :-) */
+       if (c->parent!=NULL)
+       {
+               Jim_ListAppendElement(interp, cmd_list, Jim_NewStringObj(interp, c->parent->name, -1));
+       } 
+       Jim_ListAppendElement(interp, cmd_list, Jim_NewStringObj(interp, c->name, -1));
+       
+       Jim_ListAppendElement(interp, cmd_entry, cmd_list);
+       Jim_ListAppendElement(interp, cmd_entry, Jim_NewStringObj(interp, help, -1));
+       Jim_ListAppendElement(interp, helptext, cmd_entry);
        return c;
 }
 
+int unregister_all_commands(command_context_t *context)
+{
+       command_t *c, *c2;
+       
+       if (context == NULL)
+               return ERROR_OK;
+       
+       while(NULL != context->commands)
+       {
+               c = context->commands;
+               
+               while(NULL != c->children)
+               {
+                       c2 = c->children;
+                       c->children = c->children->next;
+                       free(c2->name);
+                       c2->name = NULL;
+                       free(c2);
+                       c2 = NULL;
+               }
+               
+               context->commands = context->commands->next;
+               
+               free(c->name);
+               c->name = NULL;
+               free(c);
+               c = NULL;               
+       }
+       
+       return ERROR_OK;
+}
+
 int unregister_command(command_context_t *context, char *name)
 {
        command_t *c, *p = NULL, *c2;
        
-       unique_length_dirty = 1;
-       
        if ((!context) || (!name))
                return ERROR_INVALID_ARGUMENTS;
        
@@ -170,16 +293,12 @@ int unregister_command(command_context_t *context, char *name)
                                for (c2 = c->children; c2; c2 = c2->next)
                                {
                                        free(c2->name);
-                                       if (c2->help)
-                                               free(c2->help);
                                        free(c2);
                                }
                        }
                        
                        /* delete command */
                        free(c->name);
-                       if (c->help)
-                               free(c->help);
                        free(c);
                }
                
@@ -190,74 +309,11 @@ int unregister_command(command_context_t *context, char *name)
        return ERROR_OK;
 }
 
-int parse_line(char *line, char *words[], int max_words)
+void command_output_text(command_context_t *context, const char *data)
 {
-       int nwords = 0;
-       char *p = line;
-       char *word_start = line;
-       int inquote = 0;
-
-       while (nwords < max_words - 1)
-       {
-               /* check if we reached
-                * a terminating NUL
-                * a matching closing quote character " or '
-                * we're inside a word but not a quote, and the current character is whitespace
-                */
-               if (!*p || *p == inquote || (word_start && !inquote && isspace(*p)))
-               {
-                       /* we're inside a word or quote, and reached its end*/
-                       if (word_start)
-                       {
-                               int len;
-                               char *word_end=p;
-                               
-                               /* This will handle extra whitespace within quotes */
-                               while (isspace(*word_start)&&(word_start<word_end))
-                                       word_start++;
-                               while (isspace(*(word_end-1))&&(word_start<word_end))
-                                       word_end--;
-                               len = word_end - word_start;
-                               
-                               if (len>0)
-                               {
-                                       /* copy the word */
-                                       memcpy(words[nwords] = malloc(len + 1), word_start, len);
-                                       /* add terminating NUL */
-                                       words[nwords++][len] = 0;
-                               }
-                       }
-                       /* we're done parsing the line */
-                       if (!*p)
-                               break;
-
-                       /* skip over trailing quote or whitespace*/
-                       if (inquote || isspace(*p))
-                               p++;
-                       while (isspace(*p))
-                               p++;
-                       
-                       inquote = 0;
-                       word_start = 0;
-               }
-               else if (*p == '"' || *p == '\'')
-               {
-                       /* we've reached the beginning of a quote */
-                       inquote = *p++;
-                       word_start = p;
-               }
-               else
-               {
-                       /* we've reached the beginning of a new word */
-                       if (!word_start)
-                               word_start = p;
-                       
-                       /* normal character, skip */
-                       p++;
-               }
+       if( context && context->output_handler && data  ){
+               context->output_handler( context, data );
        }
-       
-       return nwords;
 }
 
 void command_print_n(command_context_t *context, char *format, ...)
@@ -270,7 +326,14 @@ void command_print_n(command_context_t *context, char *format, ...)
        string = alloc_vprintf(format, ap);
        if (string != NULL)
        {
-               context->output_handler(context, string);
+               /* we want this collected in the log + we also want to pick it up as a tcl return
+                * value.
+                * 
+                * The latter bit isn't precisely neat, but will do for now.
+                */
+               LOG_USER_N("%s", string);
+               // We already printed it above
+               //command_output_text(context, string);
                free(string);
        }
 
@@ -288,238 +351,145 @@ void command_print(command_context_t *context, char *format, ...)
        if (string != NULL)
        {
                strcat(string, "\n"); /* alloc_vprintf guaranteed the buffer to be at least one char longer */
-               context->output_handler(context, string);
+               /* we want this collected in the log + we also want to pick it up as a tcl return
+                * value.
+                * 
+                * The latter bit isn't precisely neat, but will do for now.
+                */
+               LOG_USER_N("%s", string);
+               // We already printed it above
+               //command_output_text(context, string);
                free(string);
        }
 
        va_end(ap);
 }
 
-int find_and_run_command(command_context_t *context, command_t *commands, char *words[], int num_words, int start_word)
+int run_command(command_context_t *context, command_t *c, char *words[], int num_words)
 {
-       command_t *c;
-       int retval = ERROR_COMMAND_SYNTAX_ERROR;
-       
-       if (unique_length_dirty)
+       int start_word=0;
+       if (!((context->mode == COMMAND_CONFIG) || (c->mode == COMMAND_ANY) || (c->mode == context->mode) ))
        {
-               unique_length_dirty = 0;
-               /* update unique lengths */
-               build_unique_lengths(context, context->commands);
+               /* Config commands can not run after the config stage */
+               LOG_ERROR("Illegal mode for command");
+               return ERROR_FAIL;
        }
        
-       for (c = commands; c; c = c->next)
+       int retval = c->handler(context, c->name, words + start_word + 1, num_words - start_word - 1);
+       if (retval == ERROR_COMMAND_SYNTAX_ERROR)
        {
-               if (strncasecmp(c->name, words[start_word], c->unique_len))
-                       continue;
-
-               if (strncasecmp(c->name, words[start_word], strlen(words[start_word])))
-                       continue;
-               
-               if ((context->mode == COMMAND_CONFIG) || (c->mode == COMMAND_ANY) || (c->mode == context->mode) )
+               /* Print help for command */
+               const char *t1="";
+               const char *t2="";
+               const char *t3="";
+               /* maximum of two levels :-) */
+               if (c->parent!=NULL)
                {
-                       if (!c->children)
-                       {
-                               if (!c->handler)
-                               {
-                                       command_print(context, "No handler for command");
-                                       retval = ERROR_COMMAND_SYNTAX_ERROR;
-                                       break;
-                               }
-                               else
-                               {
-                                       int retval = c->handler(context, c->name, words + start_word + 1, num_words - start_word - 1);
-                                       if (retval == ERROR_COMMAND_SYNTAX_ERROR)
-                                       {
-                                               command_print(context, "Syntax error:");
-                                               command_print_help_line(context, c, 0);
-                                       } else if (retval != ERROR_OK)
-                                       {
-                                               /* we do not print out an error message because the command *should*
-                                                * have printed out an error
-                                                */
-                                               LOG_DEBUG("Command failed with error code %d", retval); 
-                                       }
-                                       return retval; 
-                               }
-                       }
-                       else
-                       {
-                               if (start_word == num_words - 1)
-                               {
-                                       command_print(context, "Incomplete command");
-                                       break;
-                               }
-                               return find_and_run_command(context, c->children, words, num_words, start_word + 1);
-                       }
+                       t1=c->parent->name;
+                       t2=" ";
                }
+               t3=c->name;
+               command_run_linef(context, "help {%s%s%s}", t1, t2, t3);
        }
-       
-       command_print(context, "Command %s not found", words[start_word]);
-       return retval;
-}
-
-int command_run_line(command_context_t *context, char *line)
-{
-       int nwords;
-       char *words[128] = {0};
-       int retval;
-       int i;
-       
-       if ((!context) || (!line))
-               return ERROR_INVALID_ARGUMENTS;
-       
-       /* skip preceding whitespace */
-       while (isspace(*line))
-               line++;
-       
-       /* empty line, ignore */
-       if (!*line)
-               return ERROR_OK;
-       
-       /* ignore comments */
-       if (*line && (line[0] == '#'))
-               return ERROR_OK;
-       
-       LOG_DEBUG("%s", line);
-
-       nwords = parse_line(line, words, sizeof(words) / sizeof(words[0]));
-       
-       if (nwords > 0)
-               retval = find_and_run_command(context, context->commands, words, nwords, 0);
-       else
-               return ERROR_INVALID_ARGUMENTS;
-       
-       for (i = 0; i < nwords; i++)
-               free(words[i]);
-       
-       return retval;
-}
-
-int command_run_file(command_context_t *context, FILE *file, enum command_mode mode)
-{
-       int retval = ERROR_OK;
-       int old_command_mode;
-       char *buffer=malloc(4096);
-       if (buffer==NULL)
+       else if (retval == ERROR_COMMAND_CLOSE_CONNECTION)
        {
-               return ERROR_INVALID_ARGUMENTS;
+               /* just fall through for a shutdown request */
        }
-       
-       old_command_mode = context->mode;
-       context->mode = mode;
-       
-       while (fgets(buffer, 4096, file))
+       else if (retval != ERROR_OK)
        {
-               char *p;
-               char *cmd, *end;
-               
-               /* stop processing line after a comment (#, !) or a LF, CR were encountered */
-               if ((p = strpbrk(buffer, "#!\r\n")))
-                       *p = 0;
-
-               /* skip over leading whitespace */
-               cmd = buffer;
-               while (isspace(*cmd))
-                       cmd++;
-
-               /* empty (all whitespace) line? */
-               if (!*cmd)
-                       continue;
-               
-               /* search the end of the current line, ignore trailing whitespace */
-               for (p = end = cmd; *p; p++)
-                       if (!isspace(*p))
-                               end = p;
-               
-               /* terminate end */
-               *++end = 0;
-               if (strcasecmp(cmd, "quit") == 0)
-                       break;
-
-               /* run line */
-               if ((retval = command_run_line(context, cmd)) == ERROR_COMMAND_CLOSE_CONNECTION)
-                       break;
+               /* we do not print out an error message because the command *should*
+                * have printed out an error
+                */
+               LOG_DEBUG("Command failed with error code %d", retval); 
        }
        
-       context->mode = old_command_mode;
-
-       
-       free(buffer);
-       
-       return retval;
+       return retval; 
 }
 
-void command_print_help_line(command_context_t* context, struct command_s *command, int indent)
+int command_run_line(command_context_t *context, char *line)
 {
-       command_t *c;
-       #ifdef HAVE_C_VARRAYS
-       char indent_text[indent + 2];
-       #else
-       char indent_text[68];
-       #endif
-       char *help = "no help available";
-       char name_buf[64];
-       
-       if (indent)
+       /* all the parent commands have been registered with the interpreter
+        * so, can just evaluate the line as a script and check for
+        * results
+        */
+       /* run the line thru a script engine */
+       int retval=ERROR_FAIL;
+       int retcode;
+       /* Beware! This code needs to be reentrant. It is also possible
+        * for OpenOCD commands to be invoked directly from Tcl. This would
+        * happen when the Jim Tcl interpreter is provided by eCos for
+        * instance.
+        */
+       Jim_DeleteAssocData(interp, "context");
+       retcode = Jim_SetAssocData(interp, "context", NULL, context);
+       if (retcode == JIM_OK)
        {
-           indent_text[0] = ' ';
-           memset(indent_text + 1, '-', indent);
-           indent_text[indent + 1] = 0;
+               /* associated the return value */
+               Jim_DeleteAssocData(interp, "retval");
+               retcode = Jim_SetAssocData(interp, "retval", NULL, &retval);
+               if (retcode == JIM_OK)
+               {
+                       retcode = Jim_Eval(interp, line);
+                       
+                       Jim_DeleteAssocData(interp, "retval");
+               }       
+               Jim_DeleteAssocData(interp, "context");
        }
-       
-       if (command->help)
-               help = command->help;
-               
-       snprintf(name_buf, 64, command->name);
-
-       if (indent)
-           strncat(name_buf, indent_text, 64);
-
-       command_print(context, "%20s\t%s", name_buf, help, indent);
-       
-       if (command->children)
-       {
-               for (c = command->children; c; c = c->next)
+       if (retcode == JIM_ERR) {
+               if (retval!=ERROR_COMMAND_CLOSE_CONNECTION)
                {
-                       command_print_help_line(context, c, indent + 1);
+                       /* We do not print the connection closed error message */
+                       Jim_PrintErrorMessage(interp);
                }
-       }
-}
-
-int command_print_help_match(command_context_t* context, command_t* c_first, char* name, char** args, int argc)
-{
-       command_t * c;
-
-       for (c = c_first; c; c = c->next)
-       {
-               if (argc > 0)
+               if (retval==ERROR_OK)
                {
-                       if (strncasecmp(c->name, args[0], c->unique_len))
-                               continue;
-
-                       if (strncasecmp(c->name, args[0], strlen(args[0])))
-                               continue;
-
-                       if (argc > 1)
+                       /* It wasn't a low level OpenOCD command that failed */
+                       return ERROR_FAIL; 
+               }
+               return retval;
+       } else if (retcode == JIM_EXIT) {
+               /* ignore. */
+               /* exit(Jim_GetExitCode(interp)); */
+       } else {
+               const char *result;
+               int reslen;
+
+               result = Jim_GetString(Jim_GetResult(interp), &reslen);
+               if (reslen) {
+                       int i;
+                       char buff[256+1];
+                       for (i = 0; i < reslen; i += 256)
                        {
-                               command_print_help_match(context, c->children, name, args + 1, argc - 1);
-                               continue;
+                               int chunk;
+                               chunk = reslen - i;
+                               if (chunk > 256)
+                                       chunk = 256;
+                               strncpy(buff, result+i, chunk);
+                               buff[chunk] = 0; 
+                               LOG_USER_N("%s", buff);
                        }
+                       LOG_USER_N("%s", "\n");
                }
-
-               command_print_help_line(context, c, 0);
        }
-       
-       return ERROR_OK;
+       return retval;
 }
 
-int command_print_help(command_context_t* context, char* name, char** args, int argc)
+int command_run_linef(command_context_t *context, char *format, ...)
 {
-    return command_print_help_match(context, context->commands, name, args, argc);
+       int retval=ERROR_FAIL;
+       char *string;
+       va_list ap;
+       va_start(ap, format);
+       string = alloc_vprintf(format, ap);
+       if (string!=NULL)
+       {
+               retval=command_run_line(context, string);
+       }
+       va_end(ap);
+       return retval;
 }
 
-
-void command_set_output_handler(command_context_t* context, int (*output_handler)(struct command_context_s *context, char* line), void *priv)
+void command_set_output_handler(command_context_t* context, int (*output_handler)(struct command_context_s *context, const char* line), void *priv)
 {
        context->output_handler = output_handler;
        context->output_handler_priv = priv;
@@ -530,7 +500,7 @@ command_context_t* copy_command_context(command_context_t* context)
        command_context_t* copy_context = malloc(sizeof(command_context_t));
 
        *copy_context = *context;
-       
+
        return copy_context;
 }
 
@@ -542,28 +512,173 @@ int command_done(command_context_t *context)
        return ERROR_OK;
 }
 
+/* find full path to file */
+static int jim_find(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       if (argc != 2)
+               return JIM_ERR;
+       const char *file = Jim_GetString(argv[1], NULL);
+       char *full_path = find_file(file);
+       if (full_path == NULL)
+               return JIM_ERR;
+       Jim_Obj *result = Jim_NewStringObj(interp, full_path, strlen(full_path));
+       free(full_path);
+       
+       Jim_SetResult(interp, result);
+       return JIM_OK;
+}
+
+static int jim_echo(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       if (argc != 2)
+               return JIM_ERR;
+       const char *str = Jim_GetString(argv[1], NULL);
+       LOG_USER("%s", str);
+       return JIM_OK;
+}
+
+static size_t openocd_jim_fwrite(const void *_ptr, size_t size, size_t n, void *cookie)
+{
+       size_t nbytes;
+       const char *ptr;
+       Jim_Interp *interp;
+
+       /* make it a char easier to read code */
+       ptr = _ptr;
+       interp = cookie;
+       nbytes = size * n;
+       if (ptr == NULL || interp == NULL || nbytes == 0) {
+               return 0;
+       }
+
+       /* do we have to chunk it? */
+       if (ptr[nbytes] == 0)
+       {
+               /* no it is a C style string */
+               LOG_USER_N("%s", ptr);
+               return strlen(ptr);
+       }
+       /* GRR we must chunk - not null terminated */
+       while (nbytes) {
+               char chunk[128+1];
+               int x;
+
+               x = nbytes;
+               if (x > 128) {
+                       x = 128;
+               }
+               /* copy it */
+               memcpy(chunk, ptr, x);
+               /* terminate it */
+               chunk[n] = 0;
+               /* output it */
+               LOG_USER_N("%s", chunk);
+               ptr += x;
+               nbytes -= x;
+       }
+       
+       return n;
+}
+
+static size_t openocd_jim_fread(void *ptr, size_t size, size_t n, void *cookie)
+{
+       /* TCL wants to read... tell him no */
+       return 0;
+}
+
+static int openocd_jim_vfprintf(void *cookie, const char *fmt, va_list ap)
+{
+       char *cp;
+       int n;
+       Jim_Interp *interp;
+
+       n = -1;
+       interp = cookie;
+       if (interp == NULL)
+               return n;
+
+       cp = alloc_vprintf(fmt, ap);
+       if (cp)
+       {
+               LOG_USER_N("%s", cp);
+               n = strlen(cp);
+               free(cp);
+       }
+       return n;
+}
+
+static int openocd_jim_fflush(void *cookie)
+{
+       /* nothing to flush */
+       return 0;
+}
+
+static char* openocd_jim_fgets(char *s, int size, void *cookie)
+{
+       /* not supported */
+       errno = ENOTSUP;
+       return NULL;
+}
+
 command_context_t* command_init()
 {
        command_context_t* context = malloc(sizeof(command_context_t));
-       
+       extern unsigned const char startup_tcl[];
+
        context->mode = COMMAND_EXEC;
        context->commands = NULL;
        context->current_target = 0;
        context->output_handler = NULL;
        context->output_handler_priv = NULL;
+
+#ifdef JIM_EMBEDDED
+       Jim_InitEmbedded();
+       /* Create an interpreter */
+       interp = Jim_CreateInterp();
+       /* Add all the Jim core commands */
+       Jim_RegisterCoreCommands(interp);
+#endif
+
+       Jim_CreateCommand(interp, "ocd_find", jim_find, NULL, NULL);
+       Jim_CreateCommand(interp, "echo", jim_echo, NULL, NULL);
+
+       /* Set Jim's STDIO */
+       interp->cookie_stdin = interp;
+       interp->cookie_stdout = interp;
+       interp->cookie_stderr = interp;
+       interp->cb_fwrite = openocd_jim_fwrite;
+       interp->cb_fread = openocd_jim_fread ;
+       interp->cb_vfprintf = openocd_jim_vfprintf;
+       interp->cb_fflush = openocd_jim_fflush;
+       interp->cb_fgets = openocd_jim_fgets;
        
-       register_command(context, NULL, "help", command_print_help,
-                                        COMMAND_EXEC, "display this help");
-       
+       add_default_dirs();
+
+       if (Jim_Eval(interp, startup_tcl)==JIM_ERR)
+       {
+               LOG_ERROR("Failed to run startup.tcl (embedded into OpenOCD compile time)");
+               Jim_PrintErrorMessage(interp);
+               exit(-1);
+       }
+
        register_command(context, NULL, "sleep", handle_sleep_command,
                                         COMMAND_ANY, "sleep for <n> milliseconds");
        
-       register_command(context, NULL, "time", handle_time_command,
-                                        COMMAND_ANY, "time <cmd + args> - execute <cmd + args> and print time it took");
+       register_command(context, NULL, "fast", handle_fast_command,
+                                        COMMAND_ANY, "fast <enable/disable> - place at beginning of config files. Sets defaults to fast and dangerous.");
        
        return context;
 }
 
+int command_context_mode(command_context_t *cmd_ctx, enum command_mode mode)
+{
+       if (!cmd_ctx)
+               return ERROR_INVALID_ARGUMENTS;
+
+       cmd_ctx->mode = mode;
+       return ERROR_OK;
+}
+
 /* sleep command sleeps for <n> miliseconds
  * this is useful in target startup scripts
  */
@@ -580,27 +695,32 @@ int handle_sleep_command(struct command_context_s *cmd_ctx, char *cmd, char **ar
        return ERROR_OK;
 }
 
-int handle_time_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+int handle_fast_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
-       duration_t duration;
-       char *duration_text;
-       int retval;
-       float t;
-       
-       if (argc<1)
+       if (argc!=1)
                return ERROR_COMMAND_SYNTAX_ERROR;
        
-       duration_start_measure(&duration);
+       fast_and_dangerous = strcmp("enable", args[0])==0;
        
-       retval = find_and_run_command(cmd_ctx, cmd_ctx->commands, args, argc, 0);
-       
-       duration_stop_measure(&duration, &duration_text);
-       
-       t=duration.duration.tv_sec;
-       t+=((float)duration.duration.tv_usec / 1000000.0);
-       command_print(cmd_ctx, "%s took %fs", args[0], t);
-       
-       free(duration_text);
+       return ERROR_OK;
+}
 
-       return retval;
+void register_jim(struct command_context_s *cmd_ctx, const char *name, int (*cmd)(Jim_Interp *interp, int argc, Jim_Obj *const *argv), const char *help)
+{
+       Jim_CreateCommand(interp, name, cmd, NULL, NULL);
+
+       /* FIX!!! it would be prettier to invoke add_help_text... 
+          accumulate help text in Tcl helptext list.  */
+       Jim_Obj *helptext=Jim_GetGlobalVariableStr(interp, "ocd_helptext", JIM_ERRMSG);
+       if (Jim_IsShared(helptext))
+               helptext = Jim_DuplicateObj(interp, helptext);
+    
+       Jim_Obj *cmd_entry=Jim_NewListObj(interp, NULL, 0);
+       
+       Jim_Obj *cmd_list=Jim_NewListObj(interp, NULL, 0);
+       Jim_ListAppendElement(interp, cmd_list, Jim_NewStringObj(interp, name, -1));
+       
+       Jim_ListAppendElement(interp, cmd_entry, cmd_list);
+       Jim_ListAppendElement(interp, cmd_entry, Jim_NewStringObj(interp, help, -1));
+       Jim_ListAppendElement(interp, helptext, cmd_entry);
 }

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