* all copies or substantial portions of the Software.
*/
+#include <babeltrace/types.h>
+#include <babeltrace/babeltrace.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <errno.h>
#include <stdint.h>
+#include <unistd.h>
#include <glib.h>
+#include <stdio.h>
+
+struct packet_index {
+ off_t offset; /* offset of the packet in the file, in bytes */
+ off_t data_offset; /* offset of data within the packet */
+ size_t packet_size; /* packet size, in bits */
+ size_t content_size; /* content size, in bits */
+};
/*
- * IMPORTANT: All lengths (len) and offsets (start, end) are expressed in bits,
- * *not* in bytes.
+ * Always update ctf_stream_pos with ctf_move_pos and ctf_init_pos.
+ */
+struct ctf_stream_pos {
+ struct stream_pos parent;
+ int fd; /* backing file fd. -1 if unset. */
+ GArray *packet_index; /* contains struct packet_index */
+ int prot; /* mmap protection */
+ int flags; /* mmap flags */
+
+ /* Current position */
+ off_t mmap_offset; /* mmap offset in the file, in bytes */
+ size_t packet_size; /* current packet size, in bits */
+ size_t content_size; /* current content size, in bits */
+ uint32_t *content_size_loc; /* pointer to current content size */
+ char *base; /* mmap base address */
+ ssize_t offset; /* offset from base, in bits. EOF for end of file. */
+ size_t cur_index; /* current index in packet index */
+
+ int dummy; /* dummy position, for length calculation */
+};
+
+static inline
+struct ctf_stream_pos *ctf_pos(struct stream_pos *pos)
+{
+ return container_of(pos, struct ctf_stream_pos, parent);
+}
+
+int ctf_integer_read(struct stream_pos *pos, struct definition *definition);
+int ctf_integer_write(struct stream_pos *pos, struct definition *definition);
+int ctf_float_read(struct stream_pos *pos, struct definition *definition);
+int ctf_float_write(struct stream_pos *pos, struct definition *definition);
+int ctf_string_read(struct stream_pos *pos, struct definition *definition);
+int ctf_string_write(struct stream_pos *pos, struct definition *definition);
+int ctf_enum_read(struct stream_pos *pos, struct definition *definition);
+int ctf_enum_write(struct stream_pos *pos, struct definition *definition);
+int ctf_struct_rw(struct stream_pos *pos, struct definition *definition);
+int ctf_variant_rw(struct stream_pos *pos, struct definition *definition);
+int ctf_array_rw(struct stream_pos *pos, struct definition *definition);
+int ctf_sequence_rw(struct stream_pos *pos, struct definition *definition);
+
+void ctf_move_pos_slow(struct ctf_stream_pos *pos, size_t offset, int whence);
+
+void ctf_init_pos(struct ctf_stream_pos *pos, int fd, int open_flags);
+void ctf_fini_pos(struct ctf_stream_pos *pos);
+
+/*
+ * move_pos - move position of a relative bit offset
*
- * All write primitives, as well as read for dynamically sized entities, can
- * receive a NULL ptr/dest parameter. In this case, no write is performed, but
- * the size is returned.
+ * TODO: allow larger files by updating base too.
*/
+static inline
+void ctf_move_pos(struct ctf_stream_pos *pos, size_t bit_offset)
+{
+ printf_debug("ctf_move_pos test EOF: %zd\n", pos->offset);
+ if (pos->offset == EOF)
+ return;
+
+ if (pos->fd >= 0) {
+ if (((pos->prot == PROT_READ)
+ && (pos->offset + bit_offset >= pos->content_size))
+ || ((pos->prot == PROT_WRITE)
+ && (pos->offset + bit_offset >= pos->packet_size))) {
+ printf_debug("ctf_move_pos_slow (before call): %zd\n",
+ pos->offset);
+ ctf_move_pos_slow(pos, bit_offset, SEEK_CUR);
+ printf_debug("ctf_move_pos_slow (after call): %zd\n",
+ pos->offset);
+ return;
+ }
+ }
+ pos->offset += bit_offset;
+ printf_debug("ctf_move_pos after increment: %zd\n", pos->offset);
+}
+
+/*
+ * align_pos - align position on a bit offset (> 0)
+ *
+ * TODO: allow larger files by updating base too.
+ */
+static inline
+void ctf_align_pos(struct ctf_stream_pos *pos, size_t bit_offset)
+{
+ ctf_move_pos(pos, offset_align(pos->offset, bit_offset));
+}
+
+static inline
+char *ctf_get_pos_addr(struct ctf_stream_pos *pos)
+{
+ /* Only makes sense to get the address after aligning on CHAR_BIT */
+ assert(!(pos->offset % CHAR_BIT));
+ return pos->base + (pos->offset / CHAR_BIT);
+}
+
+static inline
+void ctf_dummy_pos(struct ctf_stream_pos *pos, struct ctf_stream_pos *dummy)
+{
+ memcpy(dummy, pos, sizeof(struct ctf_stream_pos));
+ dummy->dummy = 1;
+ dummy->fd = -1;
+}
+
+/*
+ * Check if current packet can hold data.
+ * Returns 0 for success, negative error otherwise.
+ */
+static inline
+int ctf_pos_packet(struct ctf_stream_pos *dummy)
+{
+ if (dummy->offset > dummy->packet_size)
+ return -ENOSPC;
+ return 0;
+}
+
+static inline
+void ctf_pos_pad_packet(struct ctf_stream_pos *pos)
+{
+ ctf_move_pos(pos, pos->packet_size - pos->offset);
+}
-uint64_t ctf_uint_read(struct stream_pos *pos,
- const struct type_class_integer *int_class);
-int64_t ctf_int_read(struct stream_pos *pos,
- const struct type_class_integer *int_class);
-void ctf_uint_write(struct stream_pos *pos,
- const struct type_class_integer *int_class,
- uint64_t v);
-void ctf_int_write(struct stream_pos *pos,
- const struct type_class_integer *int_class,
- int64_t v);
-
-double ctf_double_read(struct stream_pos *pos,
- const struct type_class_float *src);
-void ctf_double_write(struct stream_pos *pos,
- const struct type_class_float *dest,
- double v);
-long double ctf_ldouble_read(struct stream_pos *pos,
- const struct type_class_float *src);
-void ctf_ldouble_write(struct stream_pos *pos,
- const struct type_class_float *dest,
- long double v);
-void ctf_float_copy(struct stream_pos *destp, const struct type_class_float *dest,
- struct stream_pos *srcp, const struct type_class_float *src);
-
-void ctf_string_copy(struct stream_pos *dest, struct stream_pos *src,
- const struct type_class_string *string_class);
-void ctf_string_read(unsigned char **dest, struct stream_pos *src,
- const struct type_class_string *string_class);
-void ctf_string_write(struct stream_pos *dest, const unsigned char *src,
- const struct type_class_string *string_class);
-void ctf_string_free_temp(unsigned char *string);
-
-GQuark ctf_enum_read(struct stream_pos *pos,
- const struct type_class_enum *src);
-void ctf_enum_write(struct stream_pos *pos,
- const struct type_class_enum *dest,
- GQuark q);
-void ctf_struct_begin(struct stream_pos *pos,
- const struct type_class_struct *struct_class);
-void ctf_struct_end(struct stream_pos *pos,
- const struct type_class_struct *struct_class);
-void ctf_array_begin(struct stream_pos *pos,
- const struct type_class_array *array_class);
-void ctf_array_end(struct stream_pos *pos,
- const struct type_class_array *array_class);
-void ctf_sequence_begin(struct stream_pos *pos,
- const struct type_class_sequence *sequence_class);
-void ctf_sequence_end(struct stream_pos *pos,
- const struct type_class_sequence *sequence_class);
+static inline
+int ctf_pos_access_ok(struct ctf_stream_pos *pos, size_t bit_len)
+{
+ if (pos->offset == EOF)
+ return 0;
+ if (pos->offset + bit_len > pos->packet_size)
+ return 0;
+ return 1;
+}
#endif /* _BABELTRACE_CTF_TYPES_H */
projects / babeltrace.git / blobdiff