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-rw-r--r--src/H5Fsec2.c362
1 files changed, 175 insertions, 187 deletions
diff --git a/src/H5Fsec2.c b/src/H5Fsec2.c
index 03cd240..f97372b 100644
--- a/src/H5Fsec2.c
+++ b/src/H5Fsec2.c
@@ -8,11 +8,11 @@
* Purpose: This is the Posix section-2 I/O subclass of H5Flow.
*
* Notes: This driver keeps track of its own file position in order to
- * minimize the number of calls to lseek(). We assume that
- * opening a file sets the current file position to the beginning
- * and that read() and write() modify the file position as
- * expected when they return successfully (unsuccessful return
- * leaves the file position undefined).
+ * minimize the number of calls to lseek(). We assume that
+ * opening a file sets the current file position to the beginning
+ * and that read() and write() modify the file position as
+ * expected when they return successfully (unsuccessful return
+ * leaves the file position undefined).
*/
#include <H5private.h>
#include <H5Eprivate.h>
@@ -22,98 +22,94 @@
#include <sys/types.h>
#include <sys/stat.h>
+#define PABLO_MASK H5F_sec2
+static hbool_t interface_initialize_g = FALSE;
+#define INTERFACE_INIT NULL
-#define PABLO_MASK H5F_sec2
-static hbool_t interface_initialize_g = FALSE;
-#define INTERFACE_INIT NULL
-
-static H5F_low_t *H5F_sec2_open (const char *name, uintn flags, H5F_search_t*);
-static herr_t H5F_sec2_close (H5F_low_t *lf);
-static herr_t H5F_sec2_read (H5F_low_t *lf, const haddr_t *addr, size_t size,
- uint8 *buf);
-static herr_t H5F_sec2_write (H5F_low_t *lf, const haddr_t *addr, size_t size,
- const uint8 *buf);
-
-const H5F_low_class_t H5F_LOW_SEC2[1] = {{
- NULL, /* access method */
- H5F_sec2_open, /* open method */
- H5F_sec2_close, /* close method */
- H5F_sec2_read, /* read method */
- H5F_sec2_write, /* write method */
- NULL, /* flush method */
- NULL, /* extend method */
-}};
-
+static H5F_low_t *H5F_sec2_open(const char *name, uintn flags, H5F_search_t *);
+static herr_t H5F_sec2_close(H5F_low_t *lf);
+static herr_t H5F_sec2_read(H5F_low_t *lf, const haddr_t *addr, size_t size,
+ uint8 *buf);
+static herr_t H5F_sec2_write(H5F_low_t *lf, const haddr_t *addr, size_t size,
+ const uint8 *buf);
+const H5F_low_class_t H5F_LOW_SEC2[1] =
+{
+ {
+ NULL, /* access method */
+ H5F_sec2_open, /* open method */
+ H5F_sec2_close, /* close method */
+ H5F_sec2_read, /* read method */
+ H5F_sec2_write, /* write method */
+ NULL, /* flush method */
+ NULL, /* extend method */
+ }};
/*-------------------------------------------------------------------------
- * Function: H5F_sec2_open
+ * Function: H5F_sec2_open
*
- * Purpose: Opens a file with name NAME. The FLAGS are a bit field with
- * the possible values defined in H5F_low_open().
+ * Purpose: Opens a file with name NAME. The FLAGS are a bit field with
+ * the possible values defined in H5F_low_open().
*
* Errors:
- * IO CANTOPENFILE Open failed.
+ * IO CANTOPENFILE Open failed.
*
- * Return: Success: Low-level file pointer
+ * Return: Success: Low-level file pointer
*
- * Failure: NULL
+ * Failure: NULL
*
- * Programmer: Robb Matzke
+ * Programmer: Robb Matzke
* Wednesday, October 22, 1997
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
-static H5F_low_t *
-H5F_sec2_open (const char *name, uintn flags, H5F_search_t *key/*out*/)
+static H5F_low_t *
+H5F_sec2_open(const char *name, uintn flags, H5F_search_t *key /*out */ )
{
- uintn oflags;
- H5F_low_t *lf = NULL;
- int fd;
- struct stat sb;
-
- FUNC_ENTER (H5F_sec2_open, NULL);
+ uintn oflags;
+ H5F_low_t *lf = NULL;
+ int fd;
+ struct stat sb;
- oflags = (flags & H5F_ACC_WRITE) ? O_RDWR : O_RDONLY;
- oflags |= (flags & H5F_ACC_CREAT) ? O_CREAT : 0;
- oflags |= (flags & H5F_ACC_EXCL) ? O_EXCL : 0;
- oflags |= (flags & H5F_ACC_TRUNC) ? O_TRUNC : 0;
+ FUNC_ENTER(H5F_sec2_open, NULL);
- if ((fd=open (name, oflags, 0666))<0) {
- HRETURN_ERROR (H5E_IO, H5E_CANTOPENFILE, NULL, "open failed");
- }
-
- lf = H5MM_xcalloc (1, sizeof(H5F_low_t));
- lf->u.sec2.fd = fd;
- lf->u.sec2.op = H5F_OP_SEEK;
- lf->u.sec2.cur = 0;
- fstat (fd, &sb);
- lf->eof.offset = sb.st_size;
+ oflags = (flags & H5F_ACC_WRITE) ? O_RDWR : O_RDONLY;
+ oflags |= (flags & H5F_ACC_CREAT) ? O_CREAT : 0;
+ oflags |= (flags & H5F_ACC_EXCL) ? O_EXCL : 0;
+ oflags |= (flags & H5F_ACC_TRUNC) ? O_TRUNC : 0;
- if (key) {
- key->dev = sb.st_dev;
- key->ino = sb.st_ino;
- }
+ if ((fd = open(name, oflags, 0666)) < 0) {
+ HRETURN_ERROR(H5E_IO, H5E_CANTOPENFILE, NULL, "open failed");
+ }
+ lf = H5MM_xcalloc(1, sizeof(H5F_low_t));
+ lf->u.sec2.fd = fd;
+ lf->u.sec2.op = H5F_OP_SEEK;
+ lf->u.sec2.cur = 0;
+ fstat(fd, &sb);
+ lf->eof.offset = sb.st_size;
- FUNC_LEAVE (lf);
+ if (key) {
+ key->dev = sb.st_dev;
+ key->ino = sb.st_ino;
+ }
+ FUNC_LEAVE(lf);
}
-
/*-------------------------------------------------------------------------
- * Function: H5F_sec2_close
+ * Function: H5F_sec2_close
*
- * Purpose: Closes a file.
+ * Purpose: Closes a file.
*
* Errors:
- * IO CLOSEERROR Close failed.
+ * IO CLOSEERROR Close failed.
*
- * Return: Success: SUCCEED
+ * Return: Success: SUCCEED
*
- * Failure: FAIL
+ * Failure: FAIL
*
- * Programmer: Robb Matzke
+ * Programmer: Robb Matzke
* Wednesday, October 22, 1997
*
* Modifications:
@@ -121,35 +117,34 @@ H5F_sec2_open (const char *name, uintn flags, H5F_search_t *key/*out*/)
*-------------------------------------------------------------------------
*/
static herr_t
-H5F_sec2_close (H5F_low_t *lf)
+H5F_sec2_close(H5F_low_t *lf)
{
- FUNC_ENTER (H5F_sec2_close, FAIL);
+ FUNC_ENTER(H5F_sec2_close, FAIL);
- if (close (lf->u.sec2.fd)<0) {
- HRETURN_ERROR (H5E_IO, H5E_CLOSEERROR, FAIL, "close failed");
- }
- lf->u.sec2.fd = -1;
+ if (close(lf->u.sec2.fd) < 0) {
+ HRETURN_ERROR(H5E_IO, H5E_CLOSEERROR, FAIL, "close failed");
+ }
+ lf->u.sec2.fd = -1;
- FUNC_LEAVE (SUCCEED);
+ FUNC_LEAVE(SUCCEED);
}
-
/*-------------------------------------------------------------------------
- * Function: H5F_sec2_read
+ * Function: H5F_sec2_read
*
- * Purpose: Reads SIZE bytes beginning at address ADDR in file LF and
- * places them in buffer BUF. Reading past the logical or
- * physical end of file returns zeros instead of failing.
+ * Purpose: Reads SIZE bytes beginning at address ADDR in file LF and
+ * places them in buffer BUF. Reading past the logical or
+ * physical end of file returns zeros instead of failing.
*
* Errors:
- * IO READERROR Read failed.
- * IO SEEKERROR Lseek failed.
+ * IO READERROR Read failed.
+ * IO SEEKERROR Lseek failed.
*
- * Return: Success: SUCCEED
+ * Return: Success: SUCCEED
*
- * Failure: FAIL
+ * Failure: FAIL
*
- * Programmer: Robb Matzke
+ * Programmer: Robb Matzke
* Wednesday, October 22, 1997
*
* Modifications:
@@ -157,86 +152,81 @@ H5F_sec2_close (H5F_low_t *lf)
*-------------------------------------------------------------------------
*/
static herr_t
-H5F_sec2_read (H5F_low_t *lf, const haddr_t *addr, size_t size, uint8 *buf)
+H5F_sec2_read(H5F_low_t *lf, const haddr_t *addr, size_t size, uint8 *buf)
{
- ssize_t n;
- off_t offset;
-
- FUNC_ENTER (H5F_sec2_read, FAIL);
-
-
- /* Check for overflow */
- offset = addr->offset;
- assert ("address overflowed" && offset==addr->offset);
- assert ("overflow" && offset+size>=offset);
+ ssize_t n;
+ off_t offset;
- /* Check easy cases */
- if (0==size) HRETURN (SUCCEED);
- if (offset>=lf->eof.offset) {
- HDmemset (buf, 0, size);
- HRETURN (SUCCEED);
- }
+ FUNC_ENTER(H5F_sec2_read, FAIL);
- /*
- * Optimize seeking. If that optimization is disabled then always call
- * lseek().
- */
- if (!H5F_OPT_SEEK ||
- lf->u.sec2.op==H5F_OP_UNKNOWN ||
- lf->u.sec2.cur!=offset) {
- if (lseek (lf->u.sec2.fd, offset, SEEK_SET)<0) {
- HRETURN_ERROR (H5E_IO, H5E_SEEKERROR, FAIL, "lseek failed");
- }
- lf->u.sec2.cur = offset;
- }
+ /* Check for overflow */
+ offset = addr->offset;
+ assert("address overflowed" && offset == addr->offset);
+ assert("overflow" && offset + size >= offset);
- /*
- * Read zeros past the logical end of file (physical is handled below)
- */
- if ((size_t)offset+size>lf->eof.offset) {
- size_t nbytes = (size_t)offset+size - lf->eof.offset;
- HDmemset (buf+size-nbytes, 0, nbytes);
- size -= nbytes;
- }
+ /* Check easy cases */
+ if (0 == size)
+ HRETURN(SUCCEED);
+ if (offset >= lf->eof.offset) {
+ HDmemset(buf, 0, size);
+ HRETURN(SUCCEED);
+ }
+ /*
+ * Optimize seeking. If that optimization is disabled then always call
+ * lseek().
+ */
+ if (!H5F_OPT_SEEK ||
+ lf->u.sec2.op == H5F_OP_UNKNOWN ||
+ lf->u.sec2.cur != offset) {
+ if (lseek(lf->u.sec2.fd, offset, SEEK_SET) < 0) {
+ HRETURN_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "lseek failed");
+ }
+ lf->u.sec2.cur = offset;
+ }
+ /*
+ * Read zeros past the logical end of file (physical is handled below)
+ */
+ if ((size_t) offset + size > lf->eof.offset) {
+ size_t nbytes = (size_t) offset + size - lf->eof.offset;
+ HDmemset(buf + size - nbytes, 0, nbytes);
+ size -= nbytes;
+ }
+ /*
+ * Read the data. If a read error occurs then set the last file operation
+ * to UNKNOWN because the file position isn't guaranteed by Posix.
+ */
+ if ((n = read(lf->u.sec2.fd, buf, size)) < 0) {
+ lf->u.sec2.op = H5F_OP_UNKNOWN;
+ HRETURN_ERROR(H5E_IO, H5E_READERROR, FAIL, "read failed");
+ } else if (n < size) {
+ HDmemset(buf + n, 0, size - n);
+ }
+ /*
+ * Update the file position with the number of bytes actually read. This
+ * might be different than the number requested.
+ */
+ lf->u.sec2.op = H5F_OP_READ;
+ lf->u.sec2.cur = offset + n;
+ assert("address overflowed" && lf->u.sec2.cur >= offset);
- /*
- * Read the data. If a read error occurs then set the last file operation
- * to UNKNOWN because the file position isn't guaranteed by Posix.
- */
- if ((n=read (lf->u.sec2.fd, buf, size))<0) {
- lf->u.sec2.op = H5F_OP_UNKNOWN;
- HRETURN_ERROR (H5E_IO, H5E_READERROR, FAIL, "read failed");
- } else if (n<size) {
- HDmemset (buf+n, 0, size-n);
- }
-
- /*
- * Update the file position with the number of bytes actually read. This
- * might be different than the number requested.
- */
- lf->u.sec2.op = H5F_OP_READ;
- lf->u.sec2.cur = offset + n;
- assert ("address overflowed" && lf->u.sec2.cur>=offset);
-
- FUNC_LEAVE (SUCCEED);
+ FUNC_LEAVE(SUCCEED);
}
-
/*-------------------------------------------------------------------------
- * Function: H5F_sec2_write
+ * Function: H5F_sec2_write
*
- * Purpose: Writes SIZE bytes from the beginning of BUF into file LF at
- * file address ADDR.
+ * Purpose: Writes SIZE bytes from the beginning of BUF into file LF at
+ * file address ADDR.
*
* Errors:
- * IO SEEKERROR Lseek failed.
- * IO WRITEERROR Write failed.
+ * IO SEEKERROR Lseek failed.
+ * IO WRITEERROR Write failed.
*
- * Return: Success: SUCCEED
+ * Return: Success: SUCCEED
*
- * Failure: FAIL
+ * Failure: FAIL
*
- * Programmer: Robb Matzke
+ * Programmer: Robb Matzke
* Wednesday, October 22, 1997
*
* Modifications:
@@ -244,46 +234,44 @@ H5F_sec2_read (H5F_low_t *lf, const haddr_t *addr, size_t size, uint8 *buf)
*-------------------------------------------------------------------------
*/
static herr_t
-H5F_sec2_write (H5F_low_t *lf, const haddr_t *addr, size_t size,
- const uint8 *buf)
+H5F_sec2_write(H5F_low_t *lf, const haddr_t *addr, size_t size,
+ const uint8 *buf)
{
- off_t offset;
-
- FUNC_ENTER (H5F_sec2_write, FAIL);
-
- /* Check for overflow */
- offset = addr->offset;
- assert ("address overflowed" && offset==addr->offset);
- assert ("overflow" && offset+size>=offset);
+ off_t offset;
- /*
- * Optimize seeking. If that optimization is disabled then always call
- * lseek().
- */
- if (!H5F_OPT_SEEK ||
- lf->u.sec2.op==H5F_OP_UNKNOWN ||
- lf->u.sec2.cur!=offset) {
- if (lseek (lf->u.sec2.fd, offset, SEEK_SET)<0) {
- HRETURN_ERROR (H5E_IO, H5E_SEEKERROR, FAIL, "lseek failed");
- }
- lf->u.sec2.cur = offset;
- }
+ FUNC_ENTER(H5F_sec2_write, FAIL);
- /*
- * Write the data to the file. If the write failed then set the
- * operation back to UNKNOWN since Posix doesn't gurantee its value.
- */
- if (size != write (lf->u.sec2.fd, buf, size)) {
- lf->u.sec2.op = H5F_OP_UNKNOWN;
- HRETURN_ERROR (H5E_IO, H5E_WRITEERROR, FAIL, "write failed");
- }
+ /* Check for overflow */
+ offset = addr->offset;
+ assert("address overflowed" && offset == addr->offset);
+ assert("overflow" && offset + size >= offset);
- /*
- * Update the file position.
- */
- lf->u.sec2.op = H5F_OP_WRITE;
- lf->u.sec2.cur = offset + size;
- assert ("address overflowed" && lf->u.sec2.cur>=offset);
+ /*
+ * Optimize seeking. If that optimization is disabled then always call
+ * lseek().
+ */
+ if (!H5F_OPT_SEEK ||
+ lf->u.sec2.op == H5F_OP_UNKNOWN ||
+ lf->u.sec2.cur != offset) {
+ if (lseek(lf->u.sec2.fd, offset, SEEK_SET) < 0) {
+ HRETURN_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "lseek failed");
+ }
+ lf->u.sec2.cur = offset;
+ }
+ /*
+ * Write the data to the file. If the write failed then set the
+ * operation back to UNKNOWN since Posix doesn't gurantee its value.
+ */
+ if (size != write(lf->u.sec2.fd, buf, size)) {
+ lf->u.sec2.op = H5F_OP_UNKNOWN;
+ HRETURN_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "write failed");
+ }
+ /*
+ * Update the file position.
+ */
+ lf->u.sec2.op = H5F_OP_WRITE;
+ lf->u.sec2.cur = offset + size;
+ assert("address overflowed" && lf->u.sec2.cur >= offset);
- FUNC_LEAVE (SUCCEED);
+ FUNC_LEAVE(SUCCEED);
}
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