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author | Quincey Koziol <koziol@hdfgroup.org> | 1998-01-16 22:23:43 (GMT) |
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committer | Quincey Koziol <koziol@hdfgroup.org> | 1998-01-16 22:23:43 (GMT) |
commit | c2c94c31878dc42926661c9cb7e71be620196fc1 (patch) | |
tree | ee9ce2ae309882348dc1eafc1d105b5e6646605e /src/H5Fsec2.c | |
parent | 903e677366a86ea385d5cfe1241f3f53132941de (diff) | |
download | hdf5-c2c94c31878dc42926661c9cb7e71be620196fc1.zip hdf5-c2c94c31878dc42926661c9cb7e71be620196fc1.tar.gz hdf5-c2c94c31878dc42926661c9cb7e71be620196fc1.tar.bz2 |
[svn-r157] Reformatted code with indent...
Diffstat (limited to 'src/H5Fsec2.c')
-rw-r--r-- | src/H5Fsec2.c | 362 |
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); } |