+#include <stdio.h>
+#include <inttypes.h>
+#include <babeltrace/mmap-align.h>
+
+#define LAST_OFFSET_POISON ((int64_t) ~0ULL)
+
+struct bt_stream_callbacks;
+
+struct packet_index {
+ off_t offset; /* offset of the packet in the file, in bytes */
+ int64_t data_offset; /* offset of data within the packet, in bits */
+ uint64_t packet_size; /* packet size, in bits */
+ uint64_t content_size; /* content size, in bits */
+ uint64_t timestamp_begin;
+ uint64_t timestamp_end;
+ uint64_t events_discarded;
+ uint64_t events_discarded_len; /* length of the field, in bits */
+};
+
+/*
+ * Always update ctf_stream_pos with ctf_move_pos and ctf_init_pos.
+ */
+struct ctf_stream_pos {
+ struct bt_stream_pos parent;
+ int fd; /* backing file fd. -1 if unset. */
+ GArray *packet_cycles_index; /* contains struct packet_index in cycles */
+ GArray *packet_real_index; /* contains struct packet_index in ns */
+ int prot; /* mmap protection */
+ int flags; /* mmap flags */
+
+ /* Current position */
+ off_t mmap_offset; /* mmap offset in the file, in bytes */
+ off_t mmap_base_offset; /* offset of start of packet in mmap, in bytes */
+ uint64_t packet_size; /* current packet size, in bits */
+ uint64_t content_size; /* current content size, in bits */
+ uint64_t *content_size_loc; /* pointer to current content size */
+ struct mmap_align *base_mma;/* mmap base address */
+ int64_t offset; /* offset from base, in bits. EOF for end of file. */
+ int64_t last_offset; /* offset before the last read_event */
+ uint64_t cur_index; /* current index in packet index */
+ uint64_t last_events_discarded; /* last known amount of event discarded */
+ void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
+ int whence); /* function called to switch packet */
+
+ int dummy; /* dummy position, for length calculation */
+ struct bt_stream_callbacks *cb; /* Callbacks registered for iterator. */
+};
+
+static inline
+struct ctf_stream_pos *ctf_pos(struct bt_stream_pos *pos)
+{
+ return container_of(pos, struct ctf_stream_pos, parent);
+}
+
+BT_HIDDEN
+int ctf_integer_read(struct bt_stream_pos *pos, struct definition *definition);
+BT_HIDDEN
+int ctf_integer_write(struct bt_stream_pos *pos, struct definition *definition);
+BT_HIDDEN
+int ctf_float_read(struct bt_stream_pos *pos, struct definition *definition);
+BT_HIDDEN
+int ctf_float_write(struct bt_stream_pos *pos, struct definition *definition);
+BT_HIDDEN
+int ctf_string_read(struct bt_stream_pos *pos, struct definition *definition);
+BT_HIDDEN
+int ctf_string_write(struct bt_stream_pos *pos, struct definition *definition);
+BT_HIDDEN
+int ctf_enum_read(struct bt_stream_pos *pos, struct definition *definition);
+BT_HIDDEN
+int ctf_enum_write(struct bt_stream_pos *pos, struct definition *definition);
+BT_HIDDEN
+int ctf_struct_rw(struct bt_stream_pos *pos, struct definition *definition);
+BT_HIDDEN
+int ctf_variant_rw(struct bt_stream_pos *pos, struct definition *definition);
+BT_HIDDEN
+int ctf_array_read(struct bt_stream_pos *pos, struct definition *definition);
+BT_HIDDEN
+int ctf_array_write(struct bt_stream_pos *pos, struct definition *definition);
+BT_HIDDEN
+int ctf_sequence_read(struct bt_stream_pos *pos, struct definition *definition);
+BT_HIDDEN
+int ctf_sequence_write(struct bt_stream_pos *pos, struct definition *definition);
+
+void ctf_packet_seek(struct bt_stream_pos *pos, size_t index, int whence);
+
+int ctf_init_pos(struct ctf_stream_pos *pos, int fd, int open_flags);
+int ctf_fini_pos(struct ctf_stream_pos *pos);
+
+/*
+ * move_pos - move position of a relative bit offset
+ *
+ * TODO: allow larger files by updating base too.
+ */
+static inline
+void ctf_move_pos(struct ctf_stream_pos *pos, uint64_t bit_offset)
+{
+ printf_debug("ctf_move_pos test EOF: %" PRId64 "\n", pos->offset);
+ if (unlikely(pos->offset == EOF))
+ return;
+
+ if (pos->fd >= 0) {
+ /*
+ * PROT_READ ctf_packet_seek is called from within
+ * ctf_pos_get_event so end of packet does not change
+ * the packet context on for the last event of the
+ * packet.
+ */
+ if ((pos->prot == PROT_WRITE)
+ && (unlikely(pos->offset + bit_offset >= pos->packet_size))) {
+ printf_debug("ctf_packet_seek (before call): %" PRId64 "\n",
+ pos->offset);
+ ctf_packet_seek(&pos->parent, 0, SEEK_CUR);
+ printf_debug("ctf_packet_seek (after call): %" PRId64 "\n",
+ pos->offset);
+ return;
+ }
+ }
+ pos->offset += bit_offset;
+ printf_debug("ctf_move_pos after increment: %" PRId64 "\n", pos->offset);
+}