- all file i/o is always done on even file positions */
-
-int
-_bfd_vms_get_record (abfd)
- bfd *abfd;
-{
- int test_len, test_start, remaining;
- unsigned char *vms_buf;
-
-#if VMS_DEBUG
- vms_debug (8, "_bfd_vms_get_record\n");
-#endif
-
- /* minimum is 6 bytes on Alpha
- (2 bytes length, 2 bytes record id, 2 bytes length repeated)
-
- on VAX there's no length information in the record
- so start with OBJ_S_C_MAXRECSIZ */
-
- if (PRIV (buf_size) == 0)
- {
- bfd_size_type amt;
-
- if (PRIV (is_vax))
- {
- amt = OBJ_S_C_MAXRECSIZ;
- PRIV (file_format) = FF_VAX;
- }
- else
- amt = 6;
- PRIV (vms_buf) = (unsigned char *) bfd_malloc (amt);
- PRIV (buf_size) = amt;
- }
-
- vms_buf = PRIV (vms_buf);
-
- if (vms_buf == 0)
- return -1;
-
- switch (PRIV (file_format))
- {
- case FF_UNKNOWN:
- case FF_FOREIGN:
- test_len = 6; /* probe 6 bytes */
- test_start = 2; /* where the record starts */
- break;
-
- case FF_NATIVE:
- test_len = 4;
- test_start = 0;
- break;
-
- default:
- case FF_VAX:
- test_len = 0;
- test_start = 0;
- break;
- }
-
- /* skip odd alignment byte */
-
- if (bfd_tell (abfd) & 1)
- {
- if (bfd_bread (PRIV (vms_buf), (bfd_size_type) 1, abfd) != 1)
- {
- bfd_set_error (bfd_error_file_truncated);
- return 0;
- }
- }
-
- /* read the record header on Alpha. */
-
- if ((test_len != 0)
- && (bfd_bread (PRIV (vms_buf), (bfd_size_type) test_len, abfd)
- != (bfd_size_type) test_len))
- {
- bfd_set_error (bfd_error_file_truncated);
- return 0;
- }
-
- /* check file format on first call */
-
- if (PRIV (file_format) == FF_UNKNOWN)
- { /* record length repeats ? */
- if (vms_buf[0] == vms_buf[4]
- && vms_buf[1] == vms_buf[5])
- {
- PRIV (file_format) = FF_FOREIGN; /* Y: foreign environment */
- test_start = 2;
- }
- else
- {
- PRIV (file_format) = FF_NATIVE; /* N: native environment */
- test_start = 0;
- }
- }
-
- if (PRIV (is_vax))
- {
- PRIV (rec_length) = bfd_bread (vms_buf, (bfd_size_type) PRIV (buf_size),
- abfd);
- if (PRIV (rec_length) <= 0)
- {
- bfd_set_error (bfd_error_file_truncated);
- return 0;
- }
- PRIV (vms_rec) = vms_buf;
- }
- else /* Alpha */
- {
- /* extract vms record length */
-
- _bfd_vms_get_header_values (abfd, vms_buf + test_start, NULL,
- &PRIV (rec_length));
-
- if (PRIV (rec_length) <= 0)
- {
- bfd_set_error (bfd_error_file_truncated);
- return 0;
- }
-
- /* that's what the linker manual says */
-
- if (PRIV (rec_length) > EOBJ_S_C_MAXRECSIZ)
- {
- bfd_set_error (bfd_error_file_truncated);
- return 0;
- }
-
- /* adjust the buffer */
-
- if (PRIV (rec_length) > PRIV (buf_size))
- {
- PRIV (vms_buf) = ((unsigned char *)
- bfd_realloc (vms_buf,
- (bfd_size_type) PRIV (rec_length)));
- vms_buf = PRIV (vms_buf);
- if (vms_buf == 0)
- return -1;
- PRIV (buf_size) = PRIV (rec_length);
- }
-
- /* read the remaining record */
-
- remaining = PRIV (rec_length) - test_len + test_start;
-
-#if VMS_DEBUG
- vms_debug (10, "bfd_bread remaining %d\n", remaining);
-#endif
- if (bfd_bread (vms_buf + test_len, (bfd_size_type) remaining, abfd) !=
- (bfd_size_type) remaining)
- {
- bfd_set_error (bfd_error_file_truncated);
- return 0;
- }
- PRIV (vms_rec) = vms_buf + test_start;
- }
-
-#if VMS_DEBUG
- vms_debug (11, "bfd_bread rec_length %d\n", PRIV (rec_length));
-#endif
-
- return PRIV (rec_length);
-}
-
-/* get next vms record from file
- update vms_rec and rec_length to new (remaining) values */
-
-int
-_bfd_vms_next_record (abfd)
- bfd *abfd;
-{
-#if VMS_DEBUG
- vms_debug (8, "_bfd_vms_next_record (len %d, size %d)\n",
- PRIV (rec_length), PRIV (rec_size));
-#endif
-
- if (PRIV (rec_length) > 0)
- {
- PRIV (vms_rec) += PRIV (rec_size);
- }
- else
- {
- if (_bfd_vms_get_record (abfd) <= 0)
- return -1;
- }
-
- if (!PRIV (vms_rec) || !PRIV (vms_buf)
- || PRIV (vms_rec) >= (PRIV (vms_buf) + PRIV (buf_size)))
- return -1;
-
- if (PRIV (is_vax))
- {
- PRIV (rec_type) = *(PRIV (vms_rec));
- PRIV (rec_size) = PRIV (rec_length);
- }
- else
- {
- _bfd_vms_get_header_values (abfd, PRIV (vms_rec), &PRIV (rec_type),
- &PRIV (rec_size));
- }
- PRIV (rec_length) -= PRIV (rec_size);
-
-#if VMS_DEBUG
- vms_debug (8, "_bfd_vms_next_record: rec %p, size %d, length %d, type %d\n",
- PRIV (vms_rec), PRIV (rec_size), PRIV (rec_length),
- PRIV (rec_type));
-#endif
-
- return PRIV (rec_type);
-}
-\f
-/* Copy sized string (string with fixed length) to new allocated area
- size is string length (size of record) */