C++ Jim_GetString函数代码示例

static int aio_cmd_puts(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
    AioFile *af = Jim_CmdPrivData(interp);
    int wlen;
    const char *wdata;
    Jim_Obj *strObj;

    if (argc == 2) {
        if (!Jim_CompareStringImmediate(interp, argv[0], "-nonewline")) {
            return -1;
        }
        strObj = argv[1];
    }
    else {
        strObj = argv[0];
    }

    wdata = Jim_GetString(strObj, &wlen);
    if (fwrite(wdata, 1, wlen, af->fp) == (unsigned)wlen) {
        if (argc == 2 || putc('\n', af->fp) != EOF) {
            return JIM_OK;
        }
    }
    JimAioSetError(interp, af->filename);
    return JIM_ERR;
}

static int ioutil_Jim_Command_ls(Jim_Interp *interp,
	int argc,
	Jim_Obj * const *argv)
{
	if (argc != 2) {
		Jim_WrongNumArgs(interp, 1, argv, "ls ?dir?");
		return JIM_ERR;
	}

	const char *name = Jim_GetString(argv[1], NULL);

	DIR *dirp = NULL;
	dirp = opendir(name);
	if (dirp == NULL)
		return JIM_ERR;
	Jim_Obj *objPtr = Jim_NewListObj(interp, NULL, 0);

	for (;; ) {
		struct dirent *entry = NULL;
		entry = readdir(dirp);
		if (entry == NULL)
			break;

		if ((strcmp(".", entry->d_name) == 0) || (strcmp("..", entry->d_name) == 0))
			continue;

		Jim_ListAppendElement(interp, objPtr,
			Jim_NewStringObj(interp, entry->d_name, strlen(entry->d_name)));
	}
	closedir(dirp);

	Jim_SetResult(interp, objPtr);

	return JIM_OK;
}

static int aio_eventinfo(Jim_Interp *interp, AioFile * af, unsigned mask, Jim_Obj **scriptHandlerObj,
    int argc, Jim_Obj * const *argv)
{
    int scriptlen = 0;

    if (argc == 0) {
        /* Return current script */
        if (*scriptHandlerObj) {
            Jim_SetResult(interp, *scriptHandlerObj);
        }
        return JIM_OK;
    }

    if (*scriptHandlerObj) {
        /* Delete old handler */
        Jim_DeleteFileHandler(interp, af->fp);
        *scriptHandlerObj = NULL;
    }

    /* Now possibly add the new script(s) */
    Jim_GetString(argv[0], &scriptlen);
    if (scriptlen == 0) {
        /* Empty script, so done */
        return JIM_OK;
    }

    /* A new script to add */
    Jim_IncrRefCount(argv[0]);
    *scriptHandlerObj = argv[0];

    Jim_CreateFileHandler(interp, af->fp, mask,
        JimAioFileEventHandler, *scriptHandlerObj, JimAioFileEventFinalizer);

    return JIM_OK;
}

static int
GetAnimateWindowFlagsFromObj(Jim_Interp *interp, Jim_Obj *listObj, DWORD *flags)
{
    int r = JIM_OK, n, nLength;
    *flags = 0;
    Jim_ListLength(interp, listObj, &nLength);
    if (r == JIM_OK) {
        for (n = 0; n < nLength; n++) {
            ANIMATEWINDOWFLAGSMAP *p;
            Jim_Obj *obj;
            r = Jim_ListIndex(interp, listObj, n, &obj, 1);
            for (p = AnimateWindowFlagsMap; r == JIM_OK && p->s != NULL; p++) {
                size_t len;
                const char *name = Jim_GetString(obj, &len);
                if (strncmp(p->s, name, len) == 0) {
                    *flags |= p->f;
                    break;
                }
            }
            if (p->s == NULL) {
                Jim_SetResultString(interp, "invalid option", -1);
                return JIM_ERR;
            }
        }
    }
        
    return r;
}

/* win32.FindWindow title ?class? */
static int
Win32_FindWindow(Jim_Interp *interp, int objc, Jim_Obj *const *objv)
{
    const char *title = NULL, *class = NULL;
    HWND hwnd = NULL;
    int r = JIM_OK;

    if (objc < 2 || objc > 3) {
        Jim_WrongNumArgs(interp, 1, objv, "title ?class?");
        return JIM_ERR;
    }
    title = Jim_GetString(objv[1], NULL);
    if (objc == 3)
        class = Jim_GetString(objv[2], NULL);
    hwnd = FindWindowA(class, title);

    if (hwnd == NULL) {
        Jim_SetResult(interp, 
            Win32ErrorObj(interp, "FindWindow", GetLastError()));
        r = JIM_ERR;
    } else {
        Jim_SetResult(interp, Jim_NewIntObj(interp, (long)hwnd));
    }
    return r;
}

/*
 * Now we try to write big enough code to duplication our array in Jim's
 * list implementation. Later, we try to load a sample script in Tcl that
 * could print our list.
 */
int
main(int argc, char **argv)
{
	Jim_Interp *interp;
	int error;

	/* Create an interpreter. */
	interp = Jim_CreateInterp();
	assert(interp != NULL && "couldn't create interpreter");

	/* We register base commands, so that we actually implement Tcl. */
	Jim_RegisterCoreCommands(interp);

	/* And initialise any static extensions */
	Jim_InitStaticExtensions(interp);

	/* Register our Jim commands. */
	Jim_CreateCommand(interp, "MySampleCommand", MySampleCommandFunc,
	    NULL, NULL);

	/* Run a script. */
	error = Jim_Eval(interp, JIM_PROGRAM);
	if (error == JIM_ERR) {
		Jim_MakeErrorMessage(interp);
		fprintf(stderr, "%s\n", Jim_GetString(Jim_GetResult(interp), NULL));
		Jim_FreeInterp(interp);
		exit(EXIT_FAILURE);
	}

	Jim_FreeInterp(interp);
	return (EXIT_SUCCESS);
}

static int aio_cmd_sendto(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
    AioFile *af = Jim_CmdPrivData(interp);
    int wlen;
    int len;
    const char *wdata;
    union sockaddr_any sa;
    const char *addr = Jim_String(argv[1]);
    int salen;

    if (IPV6 && af->addr_family == PF_INET6) {
        if (JimParseIPv6Address(interp, addr, &sa, &salen) != JIM_OK) {
            return JIM_ERR;
        }
    }
    else if (JimParseIpAddress(interp, addr, &sa, &salen) != JIM_OK) {
        return JIM_ERR;
    }
    wdata = Jim_GetString(argv[0], &wlen);

    /* Note that we don't validate the socket type. Rely on sendto() failing if appropriate */
    len = sendto(fileno(af->fp), wdata, wlen, 0, &sa.sa, salen);
    if (len < 0) {
        JimAioSetError(interp, NULL);
        return JIM_ERR;
    }
    Jim_SetResultInt(interp, len);
    return JIM_OK;
}

/* Capture progress output and return as tcl return value. If the
 * progress output was empty, return tcl return value.
 */
static int jim_capture(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
	if (argc != 2)
		return JIM_ERR;

	struct log_capture_state *state = command_log_capture_start(interp);

	/* disable polling during capture. This avoids capturing output
	 * from polling.
	 *
	 * This is necessary in order to avoid accidentally getting a non-empty
	 * string for tcl fn's.
	 */
	bool save_poll = jtag_poll_get_enabled();

	jtag_poll_set_enabled(false);

	const char *str = Jim_GetString(argv[1], NULL);
	int retcode = Jim_Eval_Named(interp, str, __THIS__FILE__, __LINE__);

	jtag_poll_set_enabled(save_poll);

	command_log_capture_finish(state);

	return retcode;
}

/* Everything passing between interpreters must be converted to a string */
static Jim_Obj *JimInterpCopyObj(Jim_Interp *target, Jim_Obj *obj)
{
    const char *rep;
    int len;

    rep = Jim_GetString(obj, &len);
    return Jim_NewStringObj(target, rep, len);
}

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;
}

es_Status es_eval_tcl(es_Interp *interp, const char *script) {
  int error = Jim_Eval(interp, script);
  if (error == JIM_ERR) {
    Jim_MakeErrorMessage(interp);
    LOG_ERROR(Tcl,"%s\n", Jim_GetString(Jim_GetResult(interp), NULL));
  }
  return error;
}

/*
 * Parse "interface" keyword.
 */
static int
InterfaceFunc(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
	struct mystate *softc;
	struct iface *iface;
	Jim_Obj *ipobj;
	const char *ip;
	const char *name;
	int error;

	iface = NULL;
	ipobj = NULL;
	ip = name = NULL;
	error = 0;

	if (argc != 3)
		return (JIM_ERR);

	softc = Jim_CmdPrivData(interp);

	/* Name of the interface. */
	name = Jim_GetString(argv[1], NULL);

	softc->block_parsing = 1;
	/* Body of the block */
	error = Jim_EvalObj(interp, argv[2]);
	if (error) {
		printf("couldn't evaluate\n");
		return (JIM_ERR);
	}
	softc->block_parsing = 0;

	/* Take our hidden variable */
	ipobj = Jim_GetVariableStr(interp, JCONF_VAR_IP, JIM_NONE);
	assert(ipobj != NULL);

	ip = Jim_GetString(ipobj, NULL);
	if (ip == NULL) {
		Jim_fprintf(interp, interp->cookie_stdout, "NULL!\n");
		return (JIM_ERR);
	}
	iface = iface_alloc(ip, name);
	assert(iface != NULL);
	INSERT(softc->head, iface);
	return (JIM_OK);
}

/*
 * If the last character of the result is a newline, then remove
 * the newline character (the newline would just confuse things).
 *
 * Note: Ideally we could do this by just reducing the length of stringrep
 *       by 1, but there is no API for this :-(
 */
static void JimTrimTrailingNewline(Jim_Interp *interp)
{
    int len;
    const char *p = Jim_GetString(Jim_GetResult(interp), &len);

    if (len > 0 && p[len - 1] == '\n') {
        Jim_SetResultString(interp, p, len - 1);
    }
}

static int Jim_PosixSignalCommand(Jim_Interp *interp, int argc,
        Jim_Obj *const *argv)
{
    int sig;
    int signum;
    sighandler_t lastaction;
    sighandler_t nextaction = SIG_DFL;
    const char *op;
    int strlen = 0;

    if (argc < 2) {
        Jim_WrongNumArgs(interp, 1, argv, "signame ?action ...?");
        return JIM_ERR;
    }
    if (Jim_GetEnum(interp, argv[1], signames, &sig, "Signal Names",
                JIM_ERRMSG) != JIM_OK)
        return JIM_ERR;

    signum = signums[sig];

    switch (argc) {
    case 3:
	if (op = Jim_GetString(argv[2], &strlen),strlen == 0) {
        	return JIM_ERR;
        }
	if (strcmp("default",op) == 0) {
		nextaction = SIG_DFL;
	} else if (strcmp("ignore",op) == 0) {
		nextaction = SIG_IGN;
	} else if (strcmp("debug",op) == 0) {
		nextaction = Jim_Posix_SigHandler;
	} else {
		// this is the place to insert a script! UK
	}
	// fall through to query case:
    case 2:
	lastaction = signal(signum, nextaction);
	if (argc==2)
		signal(signum, lastaction);
	if (lastaction == SIG_ERR) {
		return JIM_ERR;
	}
	if (lastaction == SIG_DFL) {
		Jim_SetResultString(interp, "default", -1);
		return JIM_OK;
	}
	if (lastaction == SIG_IGN) {
		Jim_SetResultString(interp, "ignore", -1);
		return JIM_OK;
	} 
	Jim_SetResultString(interp, "function", -1);
	return JIM_OK;
    }

    return JIM_OK;
}

static void Jim_RemoveTrailingNewline(Jim_Obj *objPtr)
{
    int len;
    const char *s = Jim_GetString(objPtr, &len);

    if (len > 0 && s[len - 1] == '\n') {
        objPtr->length--;
        objPtr->bytes[objPtr->length] = '\0';
    }
}