From 3c43c91f0de690634b3936417bf071951264ee8c Mon Sep 17 00:00:00 2001
From: jvdelisle <jvdelisle@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 15 Sep 2006 13:16:15 +0000
Subject: [PATCH] 2006-09-14 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libgfortran/29053
* io.h (gfc_unit): Add variable, strm_pos, to track
STREAM I/O file position.
* file_pos.c (st_rewind): Set strm_pos to beginning.
* open.c (new_unit): Initialize strm_pos.
* read.c (read_x): Bump strm_pos.
* inquire.c (inquire_via_unit): Return strm_pos value.
* transfer.c (read_block),(read_block_direct),(write_block)
(write_buf): Seek to strm_pos - 1. Update strm_pos when done.
(pre_position): Initialize strm_pos.
(data_transfer_init): Set strm_pos if DT_HAS_REC.
(finalize_transfer): Flush file, no need to update strm_pos.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@116970 138bc75d-0d04-0410-961f-82ee72b054a4
---
libgfortran/ChangeLog | 15 +++++++++++++++
libgfortran/io/file_pos.c | 1 +
libgfortran/io/inquire.c | 2 +-
libgfortran/io/io.h | 5 +++--
libgfortran/io/open.c | 2 +-
libgfortran/io/read.c | 2 +-
libgfortran/io/transfer.c | 39 +++++++++++++++++++++------------------
7 files changed, 43 insertions(+), 23 deletions(-)
diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index 3671e055f488..b399bbeed99d 100644
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,18 @@
+2006-09-14 Jerry DeLisle <jvdelisle@gcc.gnu.org>
+
+ PR libgfortran/29053
+ * io.h (gfc_unit): Add variable, strm_pos, to track
+ STREAM I/O file position.
+ * file_pos.c (st_rewind): Set strm_pos to beginning.
+ * open.c (new_unit): Initialize strm_pos.
+ * read.c (read_x): Bump strm_pos.
+ * inquire.c (inquire_via_unit): Return strm_pos value.
+ * transfer.c (read_block),(read_block_direct),(write_block)
+ (write_buf): Seek to strm_pos - 1. Update strm_pos when done.
+ (pre_position): Initialize strm_pos.
+ (data_transfer_init): Set strm_pos if DT_HAS_REC.
+ (finalize_transfer): Flush file, no need to update strm_pos.
+
2006-09-10 Paul Thomas <pault@gcc.gnu.org>
PR libfortran/28947
diff --git a/libgfortran/io/file_pos.c b/libgfortran/io/file_pos.c
index 3f6a332d9799..979dec55513b 100644
--- a/libgfortran/io/file_pos.c
+++ b/libgfortran/io/file_pos.c
@@ -312,6 +312,7 @@ st_rewind (st_parameter_filepos *fpp)
u->endfile = NO_ENDFILE;
u->current_record = 0;
u->bytes_left = 0;
+ u->strm_pos = 1;
u->read_bad = 0;
test_endfile (u);
}
diff --git a/libgfortran/io/inquire.c b/libgfortran/io/inquire.c
index 8a24f498575d..36e43c29bdf7 100644
--- a/libgfortran/io/inquire.c
+++ b/libgfortran/io/inquire.c
@@ -149,7 +149,7 @@ inquire_via_unit (st_parameter_inquire *iqp, gfc_unit * u)
*iqp->recl_out = (u != NULL) ? u->recl : 0;
if ((cf & IOPARM_INQUIRE_HAS_STRM_POS_OUT) != 0)
- *iqp->strm_pos_out = (u != NULL) ? u->last_record : 0;
+ *iqp->strm_pos_out = (u != NULL) ? u->strm_pos : 0;
if ((cf & IOPARM_INQUIRE_HAS_NEXTREC) != 0)
*iqp->nextrec = (u != NULL) ? u->last_record + 1 : 0;
diff --git a/libgfortran/io/io.h b/libgfortran/io/io.h
index fba0ae839914..0bfc23d9e8c5 100644
--- a/libgfortran/io/io.h
+++ b/libgfortran/io/io.h
@@ -498,8 +498,9 @@ typedef struct gfc_unit
/* recl -- Record length of the file.
last_record -- Last record number read or written
maxrec -- Maximum record number in a direct access file
- bytes_left -- Bytes left in current record. */
- gfc_offset recl, last_record, maxrec, bytes_left;
+ bytes_left -- Bytes left in current record.
+ strm_pos -- Current position in file for STREAM I/O. */
+ gfc_offset recl, last_record, maxrec, bytes_left, strm_pos;
__gthread_mutex_t lock;
/* Number of threads waiting to acquire this unit's lock.
diff --git a/libgfortran/io/open.c b/libgfortran/io/open.c
index b3360792a22e..c75ee1a5afa7 100644
--- a/libgfortran/io/open.c
+++ b/libgfortran/io/open.c
@@ -440,7 +440,7 @@ new_unit (st_parameter_open *opp, gfc_unit *u, unit_flags * flags)
{
u->maxrec = max_offset;
u->recl = 1;
- u->last_record = 1;
+ u->strm_pos = 1;
}
memmove (u->file, opp->file, opp->file_len);
diff --git a/libgfortran/io/read.c b/libgfortran/io/read.c
index db9ff99cd121..9477425e6591 100644
--- a/libgfortran/io/read.c
+++ b/libgfortran/io/read.c
@@ -853,5 +853,5 @@ read_x (st_parameter_dt *dtp, int n)
dtp->u.p.sf_read_comma = 1;
}
else
- dtp->rec += (GFC_IO_INT) n;
+ dtp->u.p.current_unit->strm_pos += (gfc_offset) n;
}
diff --git a/libgfortran/io/transfer.c b/libgfortran/io/transfer.c
index 99e897944177..663a1bf008b4 100644
--- a/libgfortran/io/transfer.c
+++ b/libgfortran/io/transfer.c
@@ -318,7 +318,7 @@ read_block (st_parameter_dt *dtp, int *length)
else
{
if (sseek (dtp->u.p.current_unit->s,
- (gfc_offset) (dtp->rec - 1)) == FAILURE)
+ dtp->u.p.current_unit->strm_pos - 1) == FAILURE)
{
generate_error (&dtp->common, ERROR_END, NULL);
return NULL;
@@ -341,7 +341,7 @@ read_block (st_parameter_dt *dtp, int *length)
}
}
- dtp->rec += (GFC_IO_INT) nread;
+ dtp->u.p.current_unit->strm_pos += (gfc_offset) nread;
}
return source;
}
@@ -400,7 +400,7 @@ read_block_direct (st_parameter_dt *dtp, void *buf, size_t *nbytes)
else
{
if (sseek (dtp->u.p.current_unit->s,
- (gfc_offset) (dtp->rec - 1)) == FAILURE)
+ dtp->u.p.current_unit->strm_pos - 1) == FAILURE)
{
generate_error (&dtp->common, ERROR_END, NULL);
return;
@@ -420,7 +420,7 @@ read_block_direct (st_parameter_dt *dtp, void *buf, size_t *nbytes)
dtp->u.p.size_used += (gfc_offset) nread;
}
else
- dtp->rec += (GFC_IO_INT) nread;
+ dtp->u.p.current_unit->strm_pos += (gfc_offset) nread;
if (nread != *nbytes) /* Short read, e.g. if we hit EOF. */
{
@@ -479,9 +479,9 @@ write_block (st_parameter_dt *dtp, int length)
else
{
if (sseek (dtp->u.p.current_unit->s,
- (gfc_offset) (dtp->rec - 1)) == FAILURE)
+ dtp->u.p.current_unit->strm_pos - 1) == FAILURE)
{
- generate_error (&dtp->common, ERROR_END, NULL);
+ generate_error (&dtp->common, ERROR_OS, NULL);
return NULL;
}
@@ -493,7 +493,7 @@ write_block (st_parameter_dt *dtp, int length)
return NULL;
}
- dtp->rec += (GFC_IO_INT) length;
+ dtp->u.p.current_unit->strm_pos += (gfc_offset) length;
}
return dest;
@@ -531,7 +531,7 @@ write_buf (st_parameter_dt *dtp, void *buf, size_t nbytes)
else
{
if (sseek (dtp->u.p.current_unit->s,
- (gfc_offset) (dtp->rec - 1)) == FAILURE)
+ dtp->u.p.current_unit->strm_pos - 1) == FAILURE)
{
generate_error (&dtp->common, ERROR_OS, NULL);
return FAILURE;
@@ -550,7 +550,7 @@ write_buf (st_parameter_dt *dtp, void *buf, size_t nbytes)
dtp->u.p.size_used += (gfc_offset) nbytes;
}
else
- dtp->rec += (GFC_IO_INT) nbytes;
+ dtp->u.p.current_unit->strm_pos += (gfc_offset) nbytes;
return SUCCESS;
}
@@ -1506,7 +1506,7 @@ pre_position (st_parameter_dt *dtp)
/* There are no records with stream I/O. Set the default position
to the beginning of the file if no position was specified. */
if ((dtp->common.flags & IOPARM_DT_HAS_REC) == 0)
- dtp->rec = 1;
+ dtp->u.p.current_unit->strm_pos = 1;
break;
case UNFORMATTED_SEQUENTIAL:
@@ -1766,12 +1766,18 @@ data_transfer_init (st_parameter_dt *dtp, int read_flag)
}
/* Position the file. */
- if (sseek (dtp->u.p.current_unit->s, (gfc_offset) (dtp->rec - 1)
- * dtp->u.p.current_unit->recl) == FAILURE)
+ if (!is_stream_io (dtp))
{
- generate_error (&dtp->common, ERROR_OS, NULL);
- return;
+ if (sseek (dtp->u.p.current_unit->s, (gfc_offset) (dtp->rec - 1)
+ * dtp->u.p.current_unit->recl) == FAILURE)
+ {
+ generate_error (&dtp->common, ERROR_OS, NULL);
+ return;
+ }
}
+ else
+ dtp->u.p.current_unit->strm_pos = dtp->rec;
+
}
/* Overwriting an existing sequential file ?
@@ -2367,10 +2373,7 @@ finalize_transfer (st_parameter_dt *dtp)
next_record (dtp, 1);
}
else
- {
- flush (dtp->u.p.current_unit->s);
- dtp->u.p.current_unit->last_record = dtp->rec;
- }
+ flush (dtp->u.p.current_unit->s);
sfree (dtp->u.p.current_unit->s);
}
--
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