Add a generic vector interface and use it for the active effect slots

1 files changed, 38 insertions, 0 deletions

diff --git a/Alc/vector.h b/Alc/vector.h
new file mode 100644
index 00000000..51e642ee
--- /dev/null
+++ b/Alc/vector.h
@@ -0,0 +1,38 @@
+#ifndef AL_VECTOR_H
+#define AL_VECTOR_H
+
+#include <stdlib.h>
+
+#include <AL/al.h>
+
+/* "Base" vector type, designed to alias with the actual vector types. */
+typedef struct vector__s {
+    ALsizei Max;
+    ALsizei Size;
+} *vector_;
+
+#define DECL_VECTOR(T) typedef struct vector_##T##_s {                        \
+    ALsizei Max;                                                              \
+    ALsizei Size;                                                             \
+    T Data[];                                                                 \
+} *vector_##T;
+
+#define VECTOR_INIT(_x)   (((_x) = calloc(1, sizeof(*(_x)))) != NULL)
+#define VECTOR_DEINIT(_x) do { free(_x); _x = NULL; } while(0)
+
+/* Helper to increase a vector's reserve. Do not call directly. */
+ALboolean vector_reserve(void *ptr, size_t orig_count, size_t base_size, size_t obj_count, size_t obj_size);
+#define VECTOR_RESERVE(_x, _c) (vector_reserve(&(_x), (_x)->Max, sizeof(*(_x)), (_c), sizeof((_x)->Data[0])))
+
+#define VECTOR_SIZE(_x) ((const ALsizei)(_x)->Size)
+
+#define VECTOR_ITER_BEGIN(_x) ((_x)->Data)
+#define VECTOR_ITER_END(_x)   ((_x)->Data + (_x)->Size)
+
+/* NOTE: The caller must ensure enough space is reserved before pushing in new objects. */
+#define VECTOR_PUSH_BACK(_x, _obj) ((void)((_x)->Data[(_x)->Size++] = (_obj)))
+#define VECTOR_POP_BACK(_x) ((void)((_x)->Size--))
+
+#define VECTOR_ELEM(_x, _o) ((_x)->Data[_o])
+
+#endif /* AL_VECTOR_H */