Add readme, flesh out backends

1 files changed, 65 insertions, 1 deletions

diff --git a/midimonster.c b/midimonster.c
index 5d7ec7f..765c1ce 100644
--- a/midimonster.c
+++ b/midimonster.c
@@ -1,3 +1,4 @@
+#include <string.h>
 #include "midimonster.h"
 #include "config.h"
 #include "backend.h"
@@ -7,6 +8,67 @@ int artnet_init();
 int midi_init();
 int osc_init();
 
+static size_t ninstances = 0;
+static instance** instances = NULL;
+
+instance* mm_instance(){
+	instance** new_inst = realloc(instances, (ninstances + 1) * sizeof(instance*));
+	if(!new_inst){
+		//TODO free
+		fprintf(stderr, "Failed to allocate memory\n");
+		ninstances = 0;
+		return NULL;
+	}
+	instances = new_inst;
+	instances[ninstances] = calloc(1, sizeof(instance));
+	if(!instances[ninstances]){
+		fprintf(stderr, "Failed to allocate memory\n");
+		return NULL;
+	}
+
+	return instances[ninstances++];
+}
+
+int mm_backend_instances(char* name, size_t* ninst, instance*** inst){
+	backend* b = backend_match(name);
+	size_t n = 0, u;
+	//count number of affected instances
+	for(u = 0; u < ninstances; u++){
+		if(instances[u]->backend == b){
+			n++;
+		}
+	}
+
+	*ninst = n;
+	*inst = calloc(n, sizeof(instance*));
+	if(!*inst){
+		fprintf(stderr, "Failed to allocate memory\n");
+		return 1;
+	}
+
+	n = 0;
+	for(u = 0; u < ninstances; u++){
+		if(instances[u]->backend == b){
+			(*inst)[n] = instances[u];
+			n++;
+		}
+	}
+	return 0;
+}
+
+static void instances_free(){
+	size_t u;
+	for(u = 0; u < ninstances; u++){
+		free(instances[u]->name);
+		instances[u]->name = NULL;
+		instances[u]->backend = NULL;
+		free(instances[u]);
+		instances[u] = NULL;
+	}
+	free(instances);
+	ninstances = 0;
+}
+
 int usage(char* fn){
 	fprintf(stderr, "MIDIMonster v0.1\n");
 	fprintf(stderr, "Usage:\n");
@@ -23,7 +85,7 @@ int main(int argc, char** argv){
 
 	//initialize backends
 	//TODO replace this with loading shared objects
-	if(artnet_init() /*|| midi_init() || osc_init()*/){
+	if(artnet_init() || midi_init() /* || osc_init()*/){
 		fprintf(stderr, "Failed to initialize a backend\n");
 		goto bail;
 	}
@@ -32,6 +94,7 @@ int main(int argc, char** argv){
 	if(config_read(cfg_file)){
 		fprintf(stderr, "Failed to read configuration file %s\n", cfg_file);
 		backends_stop();
+		instances_free();
 		return usage(argv[0]);
 	}
 
@@ -41,6 +104,7 @@ int main(int argc, char** argv){
 bail:
 	//free all data
 	backends_stop();
+	instances_free();
 
 	return rv;
 }