コード例 #1
0
ファイル: decode.c プロジェクト: gsmcmullin/sigrok
/**
 * Initialize libsigrokdecode.
 *
 * This initializes the Python interpreter, and creates and initializes
 * a "sigrok" Python module with a single put() method.
 *
 * Then, it searches for sigrok protocol decoder files (*.py) in the
 * "decoders" subdirectory of the the sigrok installation directory.
 * All decoders that are found are loaded into memory and added to an
 * internal list of decoders, which can be queried via srd_list_decoders().
 *
 * The caller is responsible for calling the clean-up function srd_exit(),
 * which will properly shut down libsigrokdecode and free its allocated memory.
 *
 * Multiple calls to srd_init(), without calling srd_exit() inbetween,
 * are not allowed.
 *
 * @return SRD_OK upon success, a (negative) error code otherwise.
 *         Upon Python errors, return SRD_ERR_PYTHON. If the sigrok decoders
 *         directory cannot be accessed, return SRD_ERR_DECODERS_DIR.
 *         If not enough memory could be allocated, return SRD_ERR_MALLOC.
 */
int srd_init(void)
{
	DIR *dir;
	struct dirent *dp;
	char *decodername;
	struct srd_decoder *dec;
	int ret;

	/* Py_Initialize() returns void and usually cannot fail. */
	Py_Initialize();

	/* TODO: Use Py_InitModule3() to add a docstring? */
	if (!Py_InitModule("sigrok", EmbMethods)) {
		Py_Finalize(); /* Returns void. */
		return SRD_ERR_PYTHON;
	}

	/* Add search directory for the protocol decoders. */
	/* FIXME: What happens if this function is called multiple times? */
	ret = PyRun_SimpleString("import sys;"
				 "sys.path.append(r'" DECODERS_DIR "');");
	if (ret != 0) {
		Py_Finalize(); /* Returns void. */
		return SRD_ERR_PYTHON;
	}

	if (!(dir = opendir(DECODERS_DIR))) {
		Py_Finalize(); /* Returns void. */
		return SRD_ERR_DECODERS_DIR;
	}

	while ((dp = readdir(dir)) != NULL) {
		/* Ignore filenames which don't end with ".py". */
		if (!g_str_has_suffix(dp->d_name, ".py"))
			continue;

		/* Decoder name == filename (without .py suffix). */
		decodername = g_strndup(dp->d_name, strlen(dp->d_name) - 3);

		/* TODO: Error handling. Use g_try_malloc(). */
		if (!(dec = malloc(sizeof(struct srd_decoder)))) {
			Py_Finalize(); /* Returns void. */
			return SRD_ERR_MALLOC;
		}

		/* Load the decoder. */
		/* TODO: Warning if loading fails for a decoder. */
		ret = srd_load_decoder(decodername, &dec);
		if (!ret) {
			/* Append it to the list of supported/loaded decoders. */
			list_pds = g_slist_append(list_pds, dec);
		}
	}
	closedir(dir);

	return SRD_OK;
}
コード例 #2
0
ファイル: decoder.c プロジェクト: ksjoberg/sigrok
int srd_load_all_decoders(void)
{
	DIR *dir;
	struct dirent *dp;
	int ret;
	char *decodername;
	struct srd_decoder *dec;

	if (!(dir = opendir(DECODERS_DIR))) {
		Py_Finalize(); /* Returns void. */
		return SRD_ERR_DECODERS_DIR;
	}

	while ((dp = readdir(dir)) != NULL) {
		/* Ignore filenames which don't end with ".py". */
		if (!g_str_has_suffix(dp->d_name, ".py"))
			continue;

		/* Decoder name == filename (without .py suffix). */
		decodername = g_strndup(dp->d_name, strlen(dp->d_name) - 3);

		/* TODO: Error handling. Use g_try_malloc(). */
		if (!(dec = malloc(sizeof(struct srd_decoder)))) {
			Py_Finalize(); /* Returns void. */
			return SRD_ERR_MALLOC;
		}

		/* Load the decoder. */
		/* TODO: Warning if loading fails for a decoder. */
		if ((ret = srd_load_decoder(decodername, &dec)) == SRD_OK) {
			/* Append it to the list of supported/loaded decoders. */
			pd_list = g_slist_append(pd_list, dec);
		}
	}
	closedir(dir);

	return SRD_OK;
}