1 files changed, 64 insertions, 0 deletions
diff --git a/girepository/cmph/buffer_manager.c b/girepository/cmph/buffer_manager.c
new file mode 100644
index 00000000..5a051e2f
--- /dev/null
+++ b/girepository/cmph/buffer_manager.c
@@ -0,0 +1,64 @@
+#include "buffer_manager.h"
+#include "buffer_entry.h"
+#include <stdio.h>
+#include <assert.h>
+#include <stdlib.h>
+struct __buffer_manager_t
+{
+	cmph_uint32 memory_avail;         // memory available
+	buffer_entry_t ** buffer_entries; // buffer entries to be managed
+	cmph_uint32 nentries;             // number of entries to be managed
+	cmph_uint32 *memory_avail_list;   // memory available list
+	int pos_avail_list;               // current position in memory available list
+};
+
+buffer_manager_t * buffer_manager_new(cmph_uint32 memory_avail, cmph_uint32 nentries)
+{
+	cmph_uint32 memory_avail_entry, i;
+	buffer_manager_t *buff_manager = (buffer_manager_t *)malloc(sizeof(buffer_manager_t));
+	assert(buff_manager);
+	buff_manager->memory_avail = memory_avail;
+	buff_manager->buffer_entries = (buffer_entry_t **)calloc((size_t)nentries, sizeof(buffer_entry_t *));
+	buff_manager->memory_avail_list = (cmph_uint32 *)calloc((size_t)nentries, sizeof(cmph_uint32));
+	buff_manager->pos_avail_list = -1;
+	buff_manager->nentries = nentries;
+	memory_avail_entry = buff_manager->memory_avail/buff_manager->nentries + 1;
+	for(i = 0; i < buff_manager->nentries; i++)
+	{
+		buff_manager->buffer_entries[i] = buffer_entry_new(memory_avail_entry);
+	}	
+	return buff_manager;
+}
+
+void buffer_manager_open(buffer_manager_t * buffer_manager, cmph_uint32 index, char * filename)
+{
+	buffer_entry_open(buffer_manager->buffer_entries[index], filename);
+}
+
+cmph_uint8 * buffer_manager_read_key(buffer_manager_t * buffer_manager, cmph_uint32 index, cmph_uint32 * keylen)
+{
+	cmph_uint8 * key = NULL;
+	if (buffer_manager->pos_avail_list >= 0 ) // recovering memory
+	{
+		cmph_uint32 new_capacity = buffer_entry_get_capacity(buffer_manager->buffer_entries[index]) + buffer_manager->memory_avail_list[(buffer_manager->pos_avail_list)--];
+		buffer_entry_set_capacity(buffer_manager->buffer_entries[index], new_capacity);
+	}
+	key = buffer_entry_read_key(buffer_manager->buffer_entries[index], keylen);
+	if (key == NULL) // storing memory to be recovered
+	{
+		buffer_manager->memory_avail_list[++(buffer_manager->pos_avail_list)] = buffer_entry_get_capacity(buffer_manager->buffer_entries[index]);
+	}
+	return key;
+}
+
+void buffer_manager_destroy(buffer_manager_t * buffer_manager)
+{ 
+	cmph_uint32 i;
+	for(i = 0; i < buffer_manager->nentries; i++)
+	{
+		buffer_entry_destroy(buffer_manager->buffer_entries[i]);
+	}
+	free(buffer_manager->memory_avail_list);
+	free(buffer_manager->buffer_entries);
+	free(buffer_manager);
+}