1 files changed, 92 insertions, 0 deletions
diff --git a/src/mapper.c b/src/mapper.c
new file mode 100644
index 0000000..3e5c2af
--- /dev/null
+++ b/src/mapper.c
@@ -0,0 +1,92 @@
+// Copyright 2012-2024 David Robillard <d@drobilla.net>
+// SPDX-License-Identifier: ISC
+
+#include "mapper.h"
+
+#include "symap.h"
+
+#include <lv2/urid/urid.h>
+#include <zix/sem.h>
+
+#include <stdint.h>
+#include <stdlib.h>
+
+struct JalvMapperImpl {
+  Symap*         symap;
+  ZixSem         lock;
+  LV2_URID_Map   map;
+  LV2_URID_Unmap unmap;
+};
+
+static LV2_URID
+map_uri(LV2_URID_Map_Handle handle, const char* const uri)
+{
+  JalvMapper* const mapper = (JalvMapper*)handle;
+  zix_sem_wait(&mapper->lock);
+
+  const LV2_URID id = symap_map(mapper->symap, uri);
+
+  zix_sem_post(&mapper->lock);
+  return id;
+}
+
+static const char*
+unmap_uri(LV2_URID_Unmap_Handle handle, const LV2_URID urid)
+{
+  JalvMapper* const mapper = (JalvMapper*)handle;
+  zix_sem_wait(&mapper->lock);
+
+  const char* const uri = symap_unmap(mapper->symap, urid);
+
+  zix_sem_post(&mapper->lock);
+  return uri;
+}
+
+JalvMapper*
+jalv_mapper_new(void)
+{
+  JalvMapper* const mapper = (JalvMapper*)calloc(1, sizeof(JalvMapper));
+  if (mapper) {
+    mapper->symap        = symap_new();
+    mapper->map.handle   = mapper;
+    mapper->map.map      = map_uri;
+    mapper->unmap.handle = mapper;
+    mapper->unmap.unmap  = unmap_uri;
+    zix_sem_init(&mapper->lock, 1);
+  }
+  return mapper;
+}
+
+void
+jalv_mapper_free(JalvMapper* const mapper)
+{
+  if (mapper) {
+    zix_sem_destroy(&mapper->lock);
+    symap_free(mapper->symap);
+    free(mapper);
+  }
+}
+
+LV2_URID_Map*
+jalv_mapper_urid_map(JalvMapper* const mapper)
+{
+  return mapper ? &mapper->map : NULL;
+}
+
+LV2_URID_Unmap*
+jalv_mapper_urid_unmap(JalvMapper* const mapper)
+{
+  return mapper ? &mapper->unmap : NULL;
+}
+
+LV2_URID
+jalv_mapper_map_uri(JalvMapper* const mapper, const char* const sym)
+{
+  return symap_map(mapper->symap, sym);
+}
+
+const char*
+jalv_mapper_unmap_uri(const JalvMapper* mapper, uint32_t id)
+{
+  return mapper ? symap_unmap(mapper->symap, id) : NULL;
+}