command_handler_t: make args parameter const

[openocd.git] / src / helper / command.c

/***************************************************************************
 *   Copyright (C) 2005 by Dominic Rath                                    *
 *   Dominic.Rath@gmx.de                                                   *
 *                                                                         *
 *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
 *   oyvind.harboe@zylin.com                                               *
 *                                                                         *
 *   Copyright (C) 2008, Duane Ellis                                       *
 *   openocd@duaneeellis.com                                               *
 *                                                                         *
 *   part of this file is taken from libcli (libcli.sourceforge.net)       *
 *   Copyright (C) David Parrish (david@dparrish.com)                      *
 *                                                                         *
 *   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.             *
 ***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#if !BUILD_ECOSBOARD
/* see Embedder-HOWTO.txt in Jim Tcl project hosted on BerliOS*/
#define JIM_EMBEDDED
#endif

// @todo the inclusion of target.h here is a layering violation
#include "target.h"
#include "command.h"
#include "configuration.h"
#include "log.h"
#include "time_support.h"
#include "jim-eventloop.h"


int fast_and_dangerous = 0;
Jim_Interp *interp = NULL;

static int run_command(command_context_t *context,
                command_t *c, const char *words[], unsigned num_words);

static void tcl_output(void *privData, const char *file, unsigned 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;

void script_debug(Jim_Interp *interp, const char *name,
                unsigned argc, Jim_Obj *const *argv)
{
        LOG_DEBUG("command - %s", name);
        for (unsigned i = 0; i < argc; i++)
        {
                int len;
                const char *w = Jim_GetString(argv[i], &len);

                /* end of line comment? */
                if (*w == '#')
                        break;

                LOG_DEBUG("%s - argv[%d]=%s", name, i, w);
        }
}

static int script_command(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
        /* the private data is stashed in the interp structure */
        command_t *c;
        command_context_t *context;
        int retval;
        int i;
        int nwords;
        char **words;

        /* DANGER!!!! be careful what we invoke here, since interp->cmdPrivData might
         * get overwritten by running other Jim commands! Treat it as an
         * emphemeral global variable that is used in lieu of an argument
         * to the fn and fish it out manually.
         */
        c = interp->cmdPrivData;
        if (c == NULL)
        {
                LOG_ERROR("BUG: interp->cmdPrivData == NULL");
                return JIM_ERR;
        }
        target_call_timer_callbacks_now();
        LOG_USER_N("%s", ""); /* Keep GDB connection alive*/

        script_debug(interp, c->name, argc, argv);

        words = malloc(sizeof(char *) * argc);
        for (i = 0; i < argc; i++)
        {
                int len;
                const char *w = Jim_GetString(argv[i], &len);
                if (*w=='#')
                {
                        /* hit an end of line comment */
                        break;
                }
                words[i] = strdup(w);
                if (words[i] == NULL)
                {
                        int j;
                        for (j = 0; j < i; j++)
                                free(words[j]);
                        free(words);
                        return JIM_ERR;
                }
        }
        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;
        }

        /* 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, (const char **)words, nwords);

        log_remove_callback(tcl_output, tclOutput);

        /* 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;
}

static Jim_Obj *command_name_list(struct command_s *c)
{
        Jim_Obj *cmd_list = c->parent ?
                        command_name_list(c->parent) :
                        Jim_NewListObj(interp, NULL, 0);
        Jim_ListAppendElement(interp, cmd_list,
                        Jim_NewStringObj(interp, c->name, -1));

        return cmd_list;
}

static void command_helptext_add(Jim_Obj *cmd_list, const char *help)
{
        Jim_Obj *cmd_entry = Jim_NewListObj(interp, NULL, 0);
        Jim_ListAppendElement(interp, cmd_entry, cmd_list);
        Jim_ListAppendElement(interp, cmd_entry,
                        Jim_NewStringObj(interp, help ? : "", -1));

        /* 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_ListAppendElement(interp, helptext, cmd_entry);
}

/* nice short description of source file */
#define __THIS__FILE__ "command.c"

/**
 * Find a command by name from a list of commands.
 * @returns The named command if found, or NULL.
 */
static struct command_s *command_find(struct command_s **head, const char *name)
{
        assert(head);
        for (struct command_s *cc = *head; cc; cc = cc->next)
        {
                if (strcmp(cc->name, name) == 0)
                        return cc;
        }
        return NULL;
}

/**
 * Add the command to the end of linked list.
 * @returns Returns false if the named command already exists in the list.
 * Returns true otherwise.
 */
static void command_add_child(struct command_s **head, struct command_s *c)
{
        assert(head);
        if (NULL == *head)
        {
                *head = c;
                return;
        }
        struct command_s *cc = *head;
        while (cc->next) cc = cc->next;
        cc->next = c;
}

command_t* register_command(command_context_t *context,
                command_t *parent, char *name, command_handler_t handler,
                enum command_mode mode, char *help)
{
        if (!context || !name)
                return NULL;

        struct command_s **head = parent ? &parent->children : &context->commands;
        struct command_s *c = command_find(head, name);
        if (NULL != c)
                return c;

        c = malloc(sizeof(command_t));

        c->name = strdup(name);
        c->parent = parent;
        c->children = NULL;
        c->handler = handler;
        c->mode = mode;
        c->next = NULL;

        command_add_child(head, c);

        command_helptext_add(command_name_list(c), help);

        /* just a placeholder, no handler */
        if (c->handler == NULL)
                return c;

        const char *full_name = command_name(c, '_');

        const char *ocd_name = alloc_printf("ocd_%s", full_name);
        Jim_CreateCommand(interp, ocd_name, script_command, c, NULL);
        free((void *)ocd_name);

        /* we now need to add an overrideable proc */
        const char *override_name = alloc_printf("proc %s {args} {"
                        "if {[catch {eval ocd_%s $args}] == 0} "
                        "{return \"\"} else {return -code error}}",
                        full_name, full_name);
        Jim_Eval_Named(interp, override_name, __THIS__FILE__, __LINE__);
        free((void *)override_name);

        free((void *)full_name);

        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;

        if ((!context) || (!name))
                return ERROR_INVALID_ARGUMENTS;

        /* find command */
        c = context->commands;

        while (NULL != c)
        {
                if (strcmp(name, c->name) == 0)
                {
                        /* unlink command */
                        if (p)
                        {
                                p->next = c->next;
                        }
                        else
                        {
                                /* first element in command list */
                                context->commands = c->next;
                        }

                        /* unregister children */
                        while (NULL != c->children)
                        {
                                c2 = c->children;
                                c->children = c->children->next;
                                free(c2->name);
                                c2->name = NULL;
                                free(c2);
                                c2 = NULL;
                        }

                        /* delete command */
                        free(c->name);
                        c->name = NULL;
                        free(c);
                        c = NULL;
                        return ERROR_OK;
                }

                /* remember the last command for unlinking */
                p = c;
                c = c->next;
        }

        return ERROR_OK;
}

void command_output_text(command_context_t *context, const char *data)
{
        if (context && context->output_handler && data) {
                context->output_handler(context, data);
        }
}

void command_print_sameline(command_context_t *context, const char *format, ...)
{
        char *string;

        va_list ap;
        va_start(ap, format);

        string = alloc_vprintf(format, ap);
        if (string != NULL)
        {
                /* 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);
}

void command_print(command_context_t *context, const char *format, ...)
{
        char *string;

        va_list ap;
        va_start(ap, format);

        string = alloc_vprintf(format, ap);
        if (string != NULL)
        {
                strcat(string, "\n"); /* alloc_vprintf guaranteed the buffer to be at least one char longer */
                /* 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);
}

static char *__command_name(struct command_s *c, char delim, unsigned extra)
{
        char *name;
        unsigned len = strlen(c->name);
        if (NULL == c->parent) {
                // allocate enough for the name, child names, and '\0'
                name = malloc(len + extra + 1);
                strcpy(name, c->name);
        } else {
                // parent's extra must include both the space and name
                name = __command_name(c->parent, delim, 1 + len + extra);
                char dstr[2] = { delim, 0 };
                strcat(name, dstr);
                strcat(name, c->name);
        }
        return name;
}
char *command_name(struct command_s *c, char delim)
{
        return __command_name(c, delim, 0);
}

static int run_command(command_context_t *context,
                command_t *c, const char *words[], unsigned num_words)
{
        int start_word = 0;
        if (!((context->mode == COMMAND_CONFIG) || (c->mode == COMMAND_ANY) || (c->mode == context->mode)))
        {
                /* Config commands can not run after the config stage */
                LOG_ERROR("Command '%s' only runs during configuration stage", c->name);
                return ERROR_FAIL;
        }

        unsigned argc = num_words - start_word - 1;
        const char **args = words + start_word + 1;
        int retval = c->handler(context, c->name, args, argc);
        if (retval == ERROR_COMMAND_SYNTAX_ERROR)
        {
                /* Print help for command */
                char *full_name = command_name(c, ' ');
                if (NULL != full_name) {
                        command_run_linef(context, "help %s", full_name);
                        free(full_name);
                } else
                        retval = -ENOMEM;
        }
        else if (retval == ERROR_COMMAND_CLOSE_CONNECTION)
        {
                /* just fall through for a shutdown request */
        }
        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;
}

int command_run_line(command_context_t *context, char *line)
{
        /* 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)
        {
                /* associated the return value */
                Jim_DeleteAssocData(interp, "retval");
                retcode = Jim_SetAssocData(interp, "retval", NULL, &retval);
                if (retcode == JIM_OK)
                {
                        retcode = Jim_Eval_Named(interp, line, __THIS__FILE__, __LINE__);

                        Jim_DeleteAssocData(interp, "retval");
                }
                Jim_DeleteAssocData(interp, "context");
        }
        if (retcode == JIM_ERR) {
                if (retval != ERROR_COMMAND_CLOSE_CONNECTION)
                {
                        /* We do not print the connection closed error message */
                        Jim_PrintErrorMessage(interp);
                }
                if (retval == ERROR_OK)
                {
                        /* 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 > 0)
                {
                        int i;
                        char buff[256 + 1];
                        for (i = 0; i < reslen; i += 256)
                        {
                                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");
                }
                retval = ERROR_OK;
        }
        return retval;
}

int command_run_linef(command_context_t *context, const char *format, ...)
{
        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,
                command_output_handler_t output_handler, void *priv)
{
        context->output_handler = output_handler;
        context->output_handler_priv = priv;
}

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;
}

int command_done(command_context_t *context)
{
        free(context);
        context = NULL;

        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;
}

static int jim_capture(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
        if (argc != 2)
                return JIM_ERR;
        int retcode;
        const char *str = Jim_GetString(argv[1], NULL);

        /* 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);

        retcode = Jim_Eval_Named(interp, str, __THIS__FILE__, __LINE__);

        log_remove_callback(tcl_output, tclOutput);

        /* We dump output into this local variable */
        Jim_SetResult(interp, tclOutput);
        Jim_DecrRefCount(interp, tclOutput);

        return retcode;
}

/* sleep command sleeps for <n> miliseconds
 * this is useful in target startup scripts
 */
COMMAND_HANDLER(handle_sleep_command)
{
        bool busy = false;
        if (argc == 2)
        {
                if (strcmp(args[1], "busy") == 0)
                        busy = true;
                else
                        return ERROR_COMMAND_SYNTAX_ERROR;
        }
        else if (argc < 1 || argc > 2)
                return ERROR_COMMAND_SYNTAX_ERROR;

        unsigned long duration = 0;
        int retval = parse_ulong(args[0], &duration);
        if (ERROR_OK != retval)
                return retval;

        if (!busy)
        {
                long long then = timeval_ms();
                while (timeval_ms() - then < (long long)duration)
                {
                        target_call_timer_callbacks_now();
                        usleep(1000);
                }
        }
        else
                busy_sleep(duration);

        return ERROR_OK;
}

COMMAND_HANDLER(handle_fast_command)
{
        if (argc != 1)
                return ERROR_COMMAND_SYNTAX_ERROR;

        fast_and_dangerous = strcmp("enable", args[0]) == 0;

        return ERROR_OK;
}


command_context_t* command_init()
{
        command_context_t* context = malloc(sizeof(command_context_t));
        extern const char startup_tcl[];
        const char *HostOs;

        context->mode = COMMAND_EXEC;
        context->commands = NULL;
        context->current_target = 0;
        context->output_handler = NULL;
        context->output_handler_priv = NULL;

#if !BUILD_ECOSBOARD
        Jim_InitEmbedded();
        /* Create an interpreter */
        interp = Jim_CreateInterp();
        /* Add all the Jim core commands */
        Jim_RegisterCoreCommands(interp);
#endif

#if defined(_MSC_VER)
        /* WinXX - is generic, the forward
         * looking problem is this:
         *
         *   "win32" or "win64"
         *
         * "winxx" is generic.
         */
        HostOs = "winxx";
#elif defined(__linux__)
        HostOs = "linux";
#elif defined(__DARWIN__)
        HostOs = "darwin";
#elif defined(__CYGWIN__)
        HostOs = "cygwin";
#elif defined(__MINGW32__)
        HostOs = "mingw32";
#elif defined(__ECOS)
        HostOs = "ecos";
#else
#warn unrecognized host OS...
        HostOs = "other";
#endif
        Jim_SetGlobalVariableStr(interp, "ocd_HOSTOS",
                        Jim_NewStringObj(interp, HostOs , strlen(HostOs)));

        Jim_CreateCommand(interp, "ocd_find", jim_find, NULL, NULL);
        Jim_CreateCommand(interp, "echo", jim_echo, NULL, NULL);
        Jim_CreateCommand(interp, "capture", jim_capture, 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;

#if !BUILD_ECOSBOARD
        Jim_EventLoopOnLoad(interp);
#endif
        if (Jim_Eval_Named(interp, startup_tcl, "embedded:startup.tcl",1) == JIM_ERR)
        {
                LOG_ERROR("Failed to run startup.tcl (embedded into OpenOCD)");
                Jim_PrintErrorMessage(interp);
                exit(-1);
        }

        register_command(context, NULL, "sleep",
                        handle_sleep_command, COMMAND_ANY,
                        "<n> [busy] - sleep for n milliseconds. "
                        "\"busy\" means busy wait");
        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;
}

void process_jim_events(void)
{
#if !BUILD_ECOSBOARD
        static int recursion = 0;

        if (!recursion)
        {
                recursion++;
                Jim_ProcessEvents (interp, JIM_ALL_EVENTS | JIM_DONT_WAIT);
                recursion--;
        }
#endif
}

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);

        Jim_Obj *cmd_list = Jim_NewListObj(interp, NULL, 0);
        Jim_ListAppendElement(interp, cmd_list,
                        Jim_NewStringObj(interp, name, -1));

        command_helptext_add(cmd_list, help);
}

/* return global variable long value or 0 upon failure */
long jim_global_long(const char *variable)
{
        Jim_Obj *objPtr = Jim_GetGlobalVariableStr(interp, variable, JIM_ERRMSG);
        long t;
        if (Jim_GetLong(interp, objPtr, &t) == JIM_OK)
        {
                return t;
        }
        return 0;
}

#define DEFINE_PARSE_NUM_TYPE(name, type, func, min, max) \
        int parse##name(const char *str, type *ul) \
        { \
                if (!*str) \
                { \
                        LOG_ERROR("Invalid command argument"); \
                        return ERROR_COMMAND_ARGUMENT_INVALID; \
                } \
                char *end; \
                *ul = func(str, &end, 0); \
                if (*end) \
                { \
                        LOG_ERROR("Invalid command argument"); \
                        return ERROR_COMMAND_ARGUMENT_INVALID; \
                } \
                if ((max == *ul) && (ERANGE == errno)) \
                { \
                        LOG_ERROR("Argument overflow"); \
                        return ERROR_COMMAND_ARGUMENT_OVERFLOW; \
                } \
                if (min && (min == *ul) && (ERANGE == errno)) \
                { \
                        LOG_ERROR("Argument underflow"); \
                        return ERROR_COMMAND_ARGUMENT_UNDERFLOW; \
                } \
                return ERROR_OK; \
        }
DEFINE_PARSE_NUM_TYPE(_ulong, unsigned long , strtoul, 0, ULONG_MAX)
DEFINE_PARSE_NUM_TYPE(_ullong, unsigned long long, strtoull, 0, ULLONG_MAX)
DEFINE_PARSE_NUM_TYPE(_long, long , strtol, LONG_MIN, LONG_MAX)
DEFINE_PARSE_NUM_TYPE(_llong, long long, strtoll, LLONG_MIN, LLONG_MAX)

#define DEFINE_PARSE_WRAPPER(name, type, min, max, functype, funcname) \
        int parse##name(const char *str, type *ul) \
        { \
                functype n; \
                int retval = parse##funcname(str, &n); \
                if (ERROR_OK != retval) \
                        return retval; \
                if (n > max) \
                        return ERROR_COMMAND_ARGUMENT_OVERFLOW; \
                if (min) \
                        return ERROR_COMMAND_ARGUMENT_UNDERFLOW; \
                *ul = n; \
                return ERROR_OK; \
        }

#define DEFINE_PARSE_ULONG(name, type, min, max) \
        DEFINE_PARSE_WRAPPER(name, type, min, max, unsigned long, _ulong)
DEFINE_PARSE_ULONG(_uint, unsigned, 0, UINT_MAX)
DEFINE_PARSE_ULONG(_u32, uint32_t, 0, UINT32_MAX)
DEFINE_PARSE_ULONG(_u16, uint16_t, 0, UINT16_MAX)
DEFINE_PARSE_ULONG(_u8, uint8_t, 0, UINT8_MAX)

#define DEFINE_PARSE_LONG(name, type, min, max) \
        DEFINE_PARSE_WRAPPER(name, type, min, max, long, _long)
DEFINE_PARSE_LONG(_int, int, n < INT_MIN, INT_MAX)
DEFINE_PARSE_LONG(_s32, int32_t, n < INT32_MIN, INT32_MAX)
DEFINE_PARSE_LONG(_s16, int16_t, n < INT16_MIN, INT16_MAX)
DEFINE_PARSE_LONG(_s8, int8_t, n < INT8_MIN, INT8_MAX)