add name registrar

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@39 fefdeb5f-60dc-0310-8127-8f9354f1896f

1 files changed, 97 insertions, 0 deletions

diff --git a/src/namereg.c b/src/namereg.c
new file mode 100644
index 00000000..b286171d
--- /dev/null
+++ b/src/namereg.c
@@ -0,0 +1,97 @@
+#include <string.h>
+#include <assert.h>
+#include <string.h>
+#include <malloc.h>
+#include <stdio.h>
+
+#include "namereg.h"
+
+struct namereg_entry {
+    enum namereg_type type;
+    char *name;
+    void *data;
+};
+
+void namereg_free(struct core *c) {
+    assert(c);
+    if (!c->namereg)
+        return;
+    assert(hashset_ncontents(c->namereg) == 0);
+    hashset_free(c->namereg, NULL, NULL);
+}
+
+const char *namereg_register(struct core *c, const char *name, enum namereg_type type, void *data, int fail) {
+    struct namereg_entry *e;
+    char *n = NULL;
+    int r;
+    
+    assert(c && name && data);
+
+    if (!c->namereg) {
+        c->namereg = hashset_new(idxset_string_hash_func, idxset_string_compare_func);
+        assert(c->namereg);
+    }
+
+    if ((e = hashset_get(c->namereg, name)) && fail)
+        return NULL;
+
+    if (!e)
+        n = strdup(name);
+    else {
+        unsigned i;
+        size_t l = strlen(name);
+        n = malloc(l+3);
+        assert(n);
+        
+        for (i = 1; i <= 99; i++) {
+            snprintf(n, l+2, "%s%u", name, i);
+
+            if (!(e = hashset_get(c->namereg, n)))
+                break;
+        }
+
+        if (e) {
+            free(n);
+            return NULL;
+        }
+    }
+    
+    assert(n);
+    e = malloc(sizeof(struct namereg_entry));
+    assert(e);
+    e->type = type;
+    e->name = n;
+    e->data = data;
+
+    r = hashset_put(c->namereg, e->name, e);
+    assert (r >= 0);
+
+    return e->name;
+    
+}
+
+void namereg_unregister(struct core *c, const char *name) {
+    struct namereg_entry *e;
+    int r;
+    assert(c && name);
+
+    e = hashset_get(c->namereg, name);
+    assert(e);
+
+    r = hashset_remove(c->namereg, name);
+    assert(r >= 0);
+
+    free(e->name);
+    free(e);
+}
+
+void* namereg_get(struct core *c, const char *name, enum namereg_type type) {
+    struct namereg_entry *e;
+    assert(c && name);
+
+    if (!(e = hashset_get(c->namereg, name)))
+        if (e->type == e->type)
+            return e->data;
+
+    return NULL;
+}