gfc_charlen_type);
export_proto(transfer_array);
+static void us_read (st_parameter_dt *, int);
+static void us_write (st_parameter_dt *, int);
+static void next_record_r_unf (st_parameter_dt *, int);
+static void next_record_w_unf (st_parameter_dt *, int);
+
static const st_option advance_opt[] = {
{"yes", ADVANCE_YES},
{"no", ADVANCE_NO},
}
-/* Reads a block directly into application data space. */
+/* Reads a block directly into application data space. This is for
+ unformatted files. */
static void
read_block_direct (st_parameter_dt *dtp, void *buf, size_t *nbytes)
{
- size_t nread;
+ size_t to_read_record;
+ size_t have_read_record;
+ size_t to_read_subrecord;
+ size_t have_read_subrecord;
int short_record;
if (is_stream_io (dtp))
return;
}
- nread = *nbytes;
- if (sread (dtp->u.p.current_unit->s, buf, &nread) != 0)
+ to_read_record = *nbytes;
+ have_read_record = to_read_record;
+ if (sread (dtp->u.p.current_unit->s, buf, &have_read_record) != 0)
{
generate_error (&dtp->common, ERROR_OS, NULL);
return;
}
- dtp->u.p.current_unit->strm_pos += (gfc_offset) nread;
-
- if (nread != *nbytes) /* Short read, e.g. if we hit EOF. */
- generate_error (&dtp->common, ERROR_END, NULL);
+ dtp->u.p.current_unit->strm_pos += (gfc_offset) have_read_record;
+ if (to_read_record != have_read_record)
+ {
+ /* Short read, e.g. if we hit EOF. */
+ generate_error (&dtp->common, ERROR_END, NULL);
+ return;
+ }
return;
}
- /* Unformatted file with records */
- if (dtp->u.p.current_unit->bytes_left < (gfc_offset) *nbytes)
+ if (dtp->u.p.current_unit->flags.access == ACCESS_DIRECT)
{
- short_record = 1;
- nread = (size_t) dtp->u.p.current_unit->bytes_left;
- *nbytes = nread;
+ if (dtp->u.p.current_unit->bytes_left < (gfc_offset) *nbytes)
+ {
+ short_record = 1;
+ to_read_record = (size_t) dtp->u.p.current_unit->bytes_left;
+ *nbytes = to_read_record;
- if (dtp->u.p.current_unit->bytes_left == 0)
+ if (dtp->u.p.current_unit->bytes_left == 0)
+ {
+ dtp->u.p.current_unit->endfile = AT_ENDFILE;
+ generate_error (&dtp->common, ERROR_END, NULL);
+ return;
+ }
+ }
+
+ else
+ {
+ short_record = 0;
+ to_read_record = *nbytes;
+ }
+
+ dtp->u.p.current_unit->bytes_left -= to_read_record;
+
+ if (sread (dtp->u.p.current_unit->s, buf, &to_read_record) != 0)
+ {
+ generate_error (&dtp->common, ERROR_OS, NULL);
+ return;
+ }
+
+ if (to_read_record != *nbytes) /* Short read, e.g. if we hit EOF. */
{
- dtp->u.p.current_unit->endfile = AT_ENDFILE;
+ *nbytes = to_read_record;
generate_error (&dtp->common, ERROR_END, NULL);
return;
}
+
+ if (short_record)
+ {
+ generate_error (&dtp->common, ERROR_SHORT_RECORD, NULL);
+ return;
+ }
+ return;
}
+ /* Unformatted sequential. We loop over the subrecords, reading
+ until the request has been fulfilled or the record has run out
+ of continuation subrecords. */
+
+ /* Check whether we exceed the total record length. */
+
+ if (dtp->u.p.current_unit->flags.has_recl)
+ {
+ to_read_record =
+ *nbytes > (size_t) dtp->u.p.current_unit->bytes_left ?
+ *nbytes : (size_t) dtp->u.p.current_unit->bytes_left;
+ short_record = 1;
+ }
else
{
+ to_read_record = *nbytes;
short_record = 0;
- nread = *nbytes;
}
+ have_read_record = 0;
- dtp->u.p.current_unit->bytes_left -= nread;
-
- if (sread (dtp->u.p.current_unit->s, buf, &nread) != 0)
+ while(1)
{
- generate_error (&dtp->common, ERROR_OS, NULL);
- return;
- }
+ if (dtp->u.p.current_unit->bytes_left_subrecord
+ < (gfc_offset) to_read_record)
+ {
+ to_read_subrecord = (size_t) dtp->u.p.current_unit->bytes_left_subrecord;
+ to_read_record -= to_read_subrecord;
- if (nread != *nbytes) /* Short read, e.g. if we hit EOF. */
- {
- *nbytes = nread;
- generate_error (&dtp->common, ERROR_END, NULL);
- return;
+ if (dtp->u.p.current_unit->bytes_left_subrecord == 0)
+ {
+ if (dtp->u.p.current_unit->continued)
+ {
+ /* Skip to the next subrecord */
+ next_record_r_unf (dtp, 0);
+ us_read (dtp, 1);
+ continue;
+ }
+ else
+ {
+ dtp->u.p.current_unit->endfile = AT_ENDFILE;
+ generate_error (&dtp->common, ERROR_END, NULL);
+ return;
+ }
+ }
+ }
+
+ else
+ {
+ to_read_subrecord = to_read_record;
+ to_read_record = 0;
+ }
+
+ dtp->u.p.current_unit->bytes_left_subrecord -= to_read_subrecord;
+
+ have_read_subrecord = to_read_subrecord;
+ if (sread (dtp->u.p.current_unit->s, buf + have_read_record,
+ &have_read_subrecord) != 0)
+ {
+ generate_error (&dtp->common, ERROR_OS, NULL);
+ return;
+ }
+
+ have_read_record += have_read_subrecord;
+
+ if (to_read_subrecord != have_read_subrecord) /* Short read,
+ e.g. if we hit EOF. */
+ {
+ *nbytes = have_read_record;
+ generate_error (&dtp->common, ERROR_END, NULL);
+ return;
+ }
+
+ if (to_read_record > 0)
+ {
+ if (dtp->u.p.current_unit->continued)
+ {
+ next_record_r_unf (dtp, 0);
+ us_read (dtp, 1);
+ }
+ else
+ {
+ generate_error (&dtp->common, ERROR_SHORT_RECORD, NULL);
+ return;
+ }
+ }
+ else
+ {
+ /* Normal exit, the read request has been fulfilled. */
+ break;
+ }
}
+ dtp->u.p.current_unit->bytes_left -= have_read_record;
if (short_record)
{
generate_error (&dtp->common, ERROR_SHORT_RECORD, NULL);
return;
}
+ return;
}
}
-/* High level interface to swrite(), taking care of errors. */
+/* High level interface to swrite(), taking care of errors. This is only
+ called for unformatted files. There are three cases to consider:
+ Stream I/O, unformatted direct, unformatted sequential. */
static try
write_buf (st_parameter_dt *dtp, void *buf, size_t nbytes)
{
+
+ size_t have_written, to_write_subrecord;
+ int short_record;
+
+
+ /* Stream I/O. */
+
if (is_stream_io (dtp))
{
if (sseek (dtp->u.p.current_unit->s,
generate_error (&dtp->common, ERROR_OS, NULL);
return FAILURE;
}
+
+ if (swrite (dtp->u.p.current_unit->s, buf, &nbytes) != 0)
+ {
+ generate_error (&dtp->common, ERROR_OS, NULL);
+ return FAILURE;
+ }
+
+ dtp->u.p.current_unit->strm_pos += (gfc_offset) nbytes;
+
+ return SUCCESS;
}
- else
+
+ /* Unformatted direct access. */
+
+ if (dtp->u.p.current_unit->flags.access == ACCESS_DIRECT)
{
if (dtp->u.p.current_unit->bytes_left < (gfc_offset) nbytes)
{
- /* For preconnected units with default record length, set
- bytes left to unit record length and proceed, otherwise
- error. */
- if ((dtp->u.p.current_unit->unit_number == options.stdout_unit
- || dtp->u.p.current_unit->unit_number == options.stderr_unit)
- && dtp->u.p.current_unit->recl == DEFAULT_RECL)
- dtp->u.p.current_unit->bytes_left = dtp->u.p.current_unit->recl;
- else
- {
- if (dtp->u.p.current_unit->flags.access == ACCESS_DIRECT)
- generate_error (&dtp->common, ERROR_DIRECT_EOR, NULL);
- else
- generate_error (&dtp->common, ERROR_EOR, NULL);
- return FAILURE;
- }
+ generate_error (&dtp->common, ERROR_DIRECT_EOR, NULL);
+ return FAILURE;
+ }
+
+ if (swrite (dtp->u.p.current_unit->s, buf, &nbytes) != 0)
+ {
+ generate_error (&dtp->common, ERROR_OS, NULL);
+ return FAILURE;
}
- dtp->u.p.current_unit->bytes_left -= (gfc_offset) nbytes;
+ dtp->u.p.current_unit->strm_pos += (gfc_offset) nbytes;
+
+ return SUCCESS;
+
}
- if (swrite (dtp->u.p.current_unit->s, buf, &nbytes) != 0)
+ /* Unformatted sequential. */
+
+ have_written = 0;
+
+ if (dtp->u.p.current_unit->flags.has_recl
+ && (gfc_offset) nbytes > dtp->u.p.current_unit->bytes_left)
{
- generate_error (&dtp->common, ERROR_OS, NULL);
- return FAILURE;
+ nbytes = dtp->u.p.current_unit->bytes_left;
+ short_record = 1;
+ }
+ else
+ {
+ short_record = 0;
}
- if ((dtp->common.flags & IOPARM_DT_HAS_SIZE) != 0)
- dtp->u.p.size_used += (gfc_offset) nbytes;
+ while (1)
+ {
+
+ to_write_subrecord =
+ (size_t) dtp->u.p.current_unit->bytes_left_subrecord < nbytes ?
+ (size_t) dtp->u.p.current_unit->bytes_left_subrecord : nbytes;
+
+ dtp->u.p.current_unit->bytes_left_subrecord -=
+ (gfc_offset) to_write_subrecord;
- dtp->u.p.current_unit->strm_pos += (gfc_offset) nbytes;
+ if (swrite (dtp->u.p.current_unit->s, buf + have_written,
+ &to_write_subrecord) != 0)
+ {
+ generate_error (&dtp->common, ERROR_OS, NULL);
+ return FAILURE;
+ }
+
+ dtp->u.p.current_unit->strm_pos += (gfc_offset) to_write_subrecord;
+ nbytes -= to_write_subrecord;
+ have_written += to_write_subrecord;
+ if (nbytes == 0)
+ break;
+
+ next_record_w_unf (dtp, 1);
+ us_write (dtp, 1);
+ }
+ dtp->u.p.current_unit->bytes_left -= have_written;
+ if (short_record)
+ {
+ generate_error (&dtp->common, ERROR_SHORT_RECORD, NULL);
+ return FAILURE;
+ }
return SUCCESS;
}
/* Preposition a sequential unformatted file while reading. */
static void
-us_read (st_parameter_dt *dtp)
+us_read (st_parameter_dt *dtp, int continued)
{
char *p;
int n;
return;
if (compile_options.record_marker == 0)
- n = sizeof (gfc_offset);
+ n = sizeof (GFC_INTEGER_4);
else
n = compile_options.record_marker;
/* Only CONVERT_NATIVE and CONVERT_SWAP are valid here. */
if (dtp->u.p.current_unit->flags.convert == CONVERT_NATIVE)
{
- switch (compile_options.record_marker)
+ switch (nr)
{
- case 0:
- memcpy (&i, p, sizeof(gfc_offset));
- break;
-
case sizeof(GFC_INTEGER_4):
memcpy (&i4, p, sizeof (i4));
i = i4;
}
}
else
- switch (compile_options.record_marker)
+ switch (nr)
{
- case 0:
- reverse_memcpy (&i, p, sizeof(gfc_offset));
- break;
-
case sizeof(GFC_INTEGER_4):
reverse_memcpy (&i4, p, sizeof (i4));
i = i4;
break;
}
- dtp->u.p.current_unit->bytes_left = i;
+ if (i >= 0)
+ {
+ dtp->u.p.current_unit->bytes_left_subrecord = i;
+ dtp->u.p.current_unit->continued = 0;
+ }
+ else
+ {
+ dtp->u.p.current_unit->bytes_left_subrecord = -i;
+ dtp->u.p.current_unit->continued = 1;
+ }
+
+ if (! continued)
+ dtp->u.p.current_unit->bytes_left = dtp->u.p.current_unit->recl;
}
amount to writing a bogus length that will be filled in later. */
static void
-us_write (st_parameter_dt *dtp)
+us_write (st_parameter_dt *dtp, int continued)
{
size_t nbytes;
gfc_offset dummy;
dummy = 0;
if (compile_options.record_marker == 0)
- nbytes = sizeof (gfc_offset);
+ nbytes = sizeof (GFC_INTEGER_4);
else
nbytes = compile_options.record_marker ;
generate_error (&dtp->common, ERROR_OS, NULL);
/* For sequential unformatted, if RECL= was not specified in the OPEN
- we write until we have more bytes than can fit in the record markers.
- If disk space runs out first, it will error on the write. */
- if (dtp->u.p.current_unit->flags.has_recl == 0)
- dtp->u.p.current_unit->recl = max_offset;
+ we write until we have more bytes than can fit in the subrecord
+ markers, then we write a new subrecord. */
- dtp->u.p.current_unit->bytes_left = dtp->u.p.current_unit->recl;
+ dtp->u.p.current_unit->bytes_left_subrecord =
+ dtp->u.p.current_unit->recl_subrecord;
+ dtp->u.p.current_unit->continued = continued;
}
case UNFORMATTED_SEQUENTIAL:
if (dtp->u.p.mode == READING)
- us_read (dtp);
+ us_read (dtp, 0);
else
- us_write (dtp);
+ us_write (dtp, 0);
break;
return index;
}
-/* Space to the next record for read mode. If the file is not
- seekable, we read MAX_READ chunks until we get to the right
+
+
+/* Skip to the end of the current record, taking care of an optional
+ record marker of size bytes. If the file is not seekable, we
+ read chunks of size MAX_READ until we get to the right
position. */
#define MAX_READ 4096
static void
+skip_record (st_parameter_dt *dtp, size_t bytes)
+{
+ gfc_offset new;
+ int rlength, length;
+ char *p;
+
+ dtp->u.p.current_unit->bytes_left_subrecord += bytes;
+ if (dtp->u.p.current_unit->bytes_left_subrecord == 0)
+ return;
+
+ if (is_seekable (dtp->u.p.current_unit->s))
+ {
+ new = file_position (dtp->u.p.current_unit->s)
+ + dtp->u.p.current_unit->bytes_left_subrecord;
+
+ /* Direct access files do not generate END conditions,
+ only I/O errors. */
+ if (sseek (dtp->u.p.current_unit->s, new) == FAILURE)
+ generate_error (&dtp->common, ERROR_OS, NULL);
+ }
+ else
+ { /* Seek by reading data. */
+ while (dtp->u.p.current_unit->bytes_left_subrecord > 0)
+ {
+ rlength = length =
+ (MAX_READ > dtp->u.p.current_unit->bytes_left_subrecord) ?
+ MAX_READ : dtp->u.p.current_unit->bytes_left_subrecord;
+
+ p = salloc_r (dtp->u.p.current_unit->s, &rlength);
+ if (p == NULL)
+ {
+ generate_error (&dtp->common, ERROR_OS, NULL);
+ return;
+ }
+
+ dtp->u.p.current_unit->bytes_left_subrecord -= length;
+ }
+ }
+
+}
+
+#undef MAX_READ
+
+/* Advance to the next record reading unformatted files, taking
+ care of subrecords. If complete_record is nonzero, we loop
+ until all subrecords are cleared. */
+
+static void
+next_record_r_unf (st_parameter_dt *dtp, int complete_record)
+{
+ size_t bytes;
+
+ bytes = compile_options.record_marker == 0 ?
+ sizeof (GFC_INTEGER_4) : compile_options.record_marker;
+
+ while(1)
+ {
+
+ /* Skip over tail */
+
+ skip_record (dtp, bytes);
+
+ if ( ! (complete_record && dtp->u.p.current_unit->continued))
+ return;
+
+ us_read (dtp, 1);
+ }
+}
+
+/* Space to the next record for read mode. */
+
+static void
next_record_r (st_parameter_dt *dtp)
{
- gfc_offset new, record;
- int bytes_left, rlength, length;
+ gfc_offset record;
+ int length, bytes_left;
char *p;
switch (current_mode (dtp))
return;
case UNFORMATTED_SEQUENTIAL:
-
- /* Skip over tail */
- dtp->u.p.current_unit->bytes_left +=
- compile_options.record_marker == 0 ?
- sizeof (gfc_offset) : compile_options.record_marker;
-
- /* Fall through... */
+ next_record_r_unf (dtp, 1);
+ break;
case FORMATTED_DIRECT:
case UNFORMATTED_DIRECT:
- if (dtp->u.p.current_unit->bytes_left == 0)
- break;
-
- if (is_seekable (dtp->u.p.current_unit->s))
- {
- new = file_position (dtp->u.p.current_unit->s)
- + dtp->u.p.current_unit->bytes_left;
-
- /* Direct access files do not generate END conditions,
- only I/O errors. */
- if (sseek (dtp->u.p.current_unit->s, new) == FAILURE)
- generate_error (&dtp->common, ERROR_OS, NULL);
-
- }
- else
- { /* Seek by reading data. */
- while (dtp->u.p.current_unit->bytes_left > 0)
- {
- rlength = length = (MAX_READ > dtp->u.p.current_unit->bytes_left) ?
- MAX_READ : dtp->u.p.current_unit->bytes_left;
-
- p = salloc_r (dtp->u.p.current_unit->s, &rlength);
- if (p == NULL)
- {
- generate_error (&dtp->common, ERROR_OS, NULL);
- break;
- }
-
- dtp->u.p.current_unit->bytes_left -= length;
- }
- }
+ skip_record (dtp, 0);
break;
case FORMATTED_STREAM:
char p[sizeof (GFC_INTEGER_8)];
if (compile_options.record_marker == 0)
- len = sizeof (gfc_offset);
+ len = sizeof (GFC_INTEGER_4);
else
len = compile_options.record_marker;
/* Only CONVERT_NATIVE and CONVERT_SWAP are valid here. */
if (dtp->u.p.current_unit->flags.convert == CONVERT_NATIVE)
{
- switch (compile_options.record_marker)
+ switch (len)
{
- case 0:
- return swrite (dtp->u.p.current_unit->s, &buf, &len);
- break;
-
case sizeof (GFC_INTEGER_4):
buf4 = buf;
return swrite (dtp->u.p.current_unit->s, &buf4, &len);
}
else
{
- switch (compile_options.record_marker)
+ switch (len)
{
- case 0:
- reverse_memcpy (p, &buf, sizeof (gfc_offset));
- return swrite (dtp->u.p.current_unit->s, p, &len);
- break;
-
case sizeof (GFC_INTEGER_4):
buf4 = buf;
reverse_memcpy (p, &buf4, sizeof (GFC_INTEGER_4));
case sizeof (GFC_INTEGER_8):
buf8 = buf;
- reverse_memcpy (p, &buf8, sizeof (GFC_INTEGER_4));
+ reverse_memcpy (p, &buf8, sizeof (GFC_INTEGER_8));
return swrite (dtp->u.p.current_unit->s, p, &len);
break;
}
+/* Position to the next (sub)record in write mode for
+ unformatted sequential files. */
+
+static void
+next_record_w_unf (st_parameter_dt *dtp, int next_subrecord)
+{
+ gfc_offset c, m, m_write;
+ size_t record_marker;
+
+ /* Bytes written. */
+ m = dtp->u.p.current_unit->recl_subrecord
+ - dtp->u.p.current_unit->bytes_left_subrecord;
+ c = file_position (dtp->u.p.current_unit->s);
+
+ /* Write the length tail. If we finish a record containing
+ subrecords, we write out the negative length. */
+
+ if (dtp->u.p.current_unit->continued)
+ m_write = -m;
+ else
+ m_write = m;
+
+ if (write_us_marker (dtp, m_write) != 0)
+ goto io_error;
+
+ if (compile_options.record_marker == 0)
+ record_marker = sizeof (GFC_INTEGER_4);
+ else
+ record_marker = compile_options.record_marker;
+
+ /* Seek to the head and overwrite the bogus length with the real
+ length. */
+
+ if (sseek (dtp->u.p.current_unit->s, c - m - record_marker)
+ == FAILURE)
+ goto io_error;
+
+ if (next_subrecord)
+ m_write = -m;
+ else
+ m_write = m;
+
+ if (write_us_marker (dtp, m_write) != 0)
+ goto io_error;
+
+ /* Seek past the end of the current record. */
+
+ if (sseek (dtp->u.p.current_unit->s, c + record_marker) == FAILURE)
+ goto io_error;
+
+ return;
+
+ io_error:
+ generate_error (&dtp->common, ERROR_OS, NULL);
+ return;
+
+}
/* Position to the next record in write mode. */
static void
next_record_w (st_parameter_dt *dtp, int done)
{
- gfc_offset c, m, record, max_pos;
+ gfc_offset m, record, max_pos;
int length;
char *p;
- size_t record_marker;
/* Zero counters for X- and T-editing. */
max_pos = dtp->u.p.max_pos;
break;
case UNFORMATTED_SEQUENTIAL:
- /* Bytes written. */
- m = dtp->u.p.current_unit->recl - dtp->u.p.current_unit->bytes_left;
- c = file_position (dtp->u.p.current_unit->s);
-
- /* Write the length tail. */
-
- if (write_us_marker (dtp, m) != 0)
- goto io_error;
-
- if (compile_options.record_marker == 4)
- record_marker = sizeof(GFC_INTEGER_4);
- else
- record_marker = sizeof (gfc_offset);
-
- /* Seek to the head and overwrite the bogus length with the real
- length. */
-
- if (sseek (dtp->u.p.current_unit->s, c - m - record_marker)
- == FAILURE)
- goto io_error;
-
- if (write_us_marker (dtp, m) != 0)
- goto io_error;
-
- /* Seek past the end of the current record. */
-
- if (sseek (dtp->u.p.current_unit->s, c + record_marker) == FAILURE)
- goto io_error;
-
+ next_record_w_unf (dtp, 0);
break;
case FORMATTED_STREAM:
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