srd: decode.c: Add/fix comments and coding-style.

diff --git a/decode.c b/decode.c
index 6c63fa7c1f069ca44faa1ed4b80966cb752a0aba..e3974b9dbe26a5bb5a9a572510f158410dbcc4f2 100644 (file)
--- a/decode.c
+++ b/decode.c
@@ -51,11 +51,10 @@ static int srd_load_decoder(const char *name, struct srd_decoder **dec);
 
 static int _unitsize = 1;
 
-static PyObject*
-emb_put(PyObject *self, PyObject *args)
+static PyObject *emb_put(PyObject *self, PyObject *args)
 {
        PyObject *arg;
-       
+
        (void)self;
 
        if (!PyArg_ParseTuple(args, "O:put", &arg))
@@ -70,7 +69,7 @@ emb_put(PyObject *self, PyObject *args)
 
 static PyMethodDef EmbMethods[] = {
        {"put", emb_put, METH_VARARGS,
-               "Accepts a dictionary with the following keys: time, duration, data"},
+        "Accepts a dictionary with the following keys: time, duration, data"},
        {NULL, NULL, 0, NULL}
 };
 
@@ -119,19 +118,19 @@ int srd_init(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. */
+               /* TODO: Error handling. Use g_try_malloc(). */
                dec = malloc(sizeof(struct srd_decoder));
 
                /* Load the decoder. */
                ret = srd_load_decoder(decodername, &dec);
-               if (!ret)
-               {
+               if (!ret) {
                        /* Append it to the list of supported/loaded decoders. */
                        list_pds = g_slist_append(list_pds, dec);
                }
@@ -231,12 +230,12 @@ err_h_decref_mod:
  *
  * @return SRD_OK upon success, a (negative) error code otherwise.
  */
-static int srd_load_decoder(const char *name,
-                             struct srd_decoder **dec)
+static int srd_load_decoder(const char *name, struct srd_decoder **dec)
 {
        struct srd_decoder *d;
        PyObject *py_mod, *py_res;
        int r;
+
        fprintf(stdout, "%s: %s\n", __func__, name);
 
        /* "Import" the Python module. */
@@ -258,7 +257,7 @@ static int srd_load_decoder(const char *name,
        if (!(d = malloc(sizeof(struct srd_decoder))))
                return SRD_ERR_MALLOC;
 
-       /* We'll just use the name of the module for the id */
+       /* We'll just use the name of the module for the ID. */
        d->id = strdup(name);
 
        if ((r = h_str(py_res, py_mod, "name", &(d->name))) < 0)
@@ -300,27 +299,34 @@ static int srd_load_decoder(const char *name,
 
 struct srd_decoder_instance *srd_instance_new(const char *id)
 {
-       struct srd_decoder *dec = srd_get_decoder_by_id(id);
-       if (!dec) 
-               return NULL;
-       struct srd_decoder_instance *di = g_malloc(sizeof(*di));
+       struct srd_decoder *dec;
+       struct srd_decoder_instance *di;
        PyObject *py_args, *py_value;
 
-       /* Create a Python tuple of size 1. */
+       if (!(dec = srd_get_decoder_by_id(id)))
+               return NULL;
+
+       /* TODO: Error handling. Use g_try_malloc(). */
+       di = g_malloc(sizeof(*di));
+
+       /* Create an empty Python tuple. */
        if (!(py_args = PyTuple_New(0))) { /* NEWREF */
                if (PyErr_Occurred())
                        PyErr_Print(); /* Returns void. */
-               
+
                return NULL; /* TODO: More specific error? */
        }
-       
-       py_value = Py_BuildValue("{sssisd}", 
-                                 "driver", "demo",
-                                 "unitsize", _unitsize, //FIXME: Pass in a unitsize that matches the selected LA
-                                 "starttime", 129318231823.0 //TODO: Fill with something reasonable.
-                                 );
 
-       /* Create an instance of the Decoder class */
+       /*
+        * FIXME: Pass in a unitsize that matches the selected LA.
+        * FIXME: Fill 'starttime' with something reasonable.
+        */
+       py_value = Py_BuildValue("{sssisd}",
+                                "driver", "demo",
+                                "unitsize", _unitsize,
+                                "starttime", 129318231823.0);
+
+       /* Create an instance of the 'Decoder' class. */
        di->py_instance = PyObject_Call(dec->py_decobj, py_args, py_value);
        if (!di->py_instance) {
                if (PyErr_Occurred())
@@ -328,7 +334,7 @@ struct srd_decoder_instance *srd_instance_new(const char *id)
                Py_XDECREF(py_args);
                Py_XDECREF(py_value); /* TODO: Ref. stolen upon error? */
                return NULL; /* TODO: More specific error? */
-       } 
+       }
 
        Py_XDECREF(py_args);
        Py_XDECREF(py_value);
@@ -337,22 +343,24 @@ struct srd_decoder_instance *srd_instance_new(const char *id)
 }
 
 int srd_instance_set_probe(struct srd_decoder_instance *di,
-                               const char *probename, int num)
+                          const char *probename, int num)
 {
        PyObject *probedict, *probenum;
+
        probedict = PyObject_GetAttrString(di->py_instance, "probes"); /* NEWREF */
        if (!probedict) {
                if (PyErr_Occurred())
                        PyErr_Print(); /* Returns void. */
-               
+
                return SRD_ERR_PYTHON; /* TODO: More specific error? */
        }
 
        probenum = PyInt_FromLong(num);
-       PyMapping_SetItemString(probedict, (char*)probename, probenum);
+       PyMapping_SetItemString(probedict, (char *)probename, probenum);
 
        Py_XDECREF(probenum);
        Py_XDECREF(probedict);
+
        return SRD_OK;
 }
 
@@ -368,14 +376,14 @@ int srd_instance_set_probe(struct srd_decoder_instance *di,
  * @return SRD_OK upon success, a (negative) error code otherwise.
  */
 int srd_run_decoder(struct srd_decoder_instance *dec,
-                            uint8_t *inbuf, uint64_t inbuflen,
-                            uint8_t **outbuf, uint64_t *outbuflen)
+                   uint8_t *inbuf, uint64_t inbuflen,
+                   uint8_t **outbuf, uint64_t *outbuflen)
 {
        PyObject *py_instance, *py_value, *py_res;
        int ret;
-       
        /* FIXME: Don't have a timebase available here. Make one up. */
        static int _timehack = 0;
+
        _timehack += inbuflen;
 
        /* TODO: Use #defines for the return codes. */
@@ -391,7 +399,7 @@ int srd_run_decoder(struct srd_decoder_instance *dec,
                return SRD_ERR_ARGS; /* TODO: More specific error? */
        if (outbuflen == NULL)
                return SRD_ERR_ARGS; /* TODO: More specific error? */
-       
+
        /* TODO: Error handling. */
        py_instance = dec->py_instance;
        Py_XINCREF(py_instance);
@@ -399,19 +407,17 @@ int srd_run_decoder(struct srd_decoder_instance *dec,
        /* Get the input buffer as Python "string" (byte array). */
        /* TODO: int vs. uint64_t for 'inbuflen'? */
 
-       py_value = Py_BuildValue("{sisiss#}", 
-                                         "time", _timehack,
-                                         "duration", 10,
-                                         "data", inbuf, inbuflen / _unitsize
-                                         );
+       py_value = Py_BuildValue("{sisiss#}",
+                                "time", _timehack,
+                                "duration", 10,
+                                "data", inbuf, inbuflen / _unitsize);
        
-       if (!(py_res = PyObject_CallMethod(py_instance, "decode", 
-                                       "O", py_value))) { /* NEWREF */
+       if (!(py_res = PyObject_CallMethod(py_instance, "decode",
+                                          "O", py_value))) { /* NEWREF */
                ret = SRD_ERR_PYTHON; /* TODO: More specific error? */
                goto err_run_decref_args;
        }
 
-
        ret = SRD_OK;
 
        Py_XDECREF(py_res);