75 lines
1.3 KiB
C
75 lines
1.3 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1997
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* Sleepycat Software. All rights reserved.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "@(#)os_rw.c 10.6 (Sleepycat) 10/25/97";
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#endif /* not lint */
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <errno.h>
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#include <unistd.h>
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#endif
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#include "db_int.h"
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/*
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* __db_read --
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* Read from a file handle.
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*
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* PUBLIC: int __db_read __P((int, void *, size_t, ssize_t *));
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*/
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int
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__db_read(fd, addr, len, nrp)
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int fd;
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void *addr;
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size_t len;
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ssize_t *nrp;
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{
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size_t offset;
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ssize_t nr;
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u_int8_t *taddr;
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for (taddr = addr,
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offset = 0; offset < len; taddr += nr, offset += nr) {
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if ((nr = __os_read(fd, taddr, len - offset)) < 0)
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return (errno);
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if (nr == 0)
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break;
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}
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*nrp = taddr - (u_int8_t *)addr;
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return (0);
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}
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/*
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* __db_write --
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* Write to a file handle.
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*
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* PUBLIC: int __db_write __P((int, void *, size_t, ssize_t *));
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*/
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int
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__db_write(fd, addr, len, nwp)
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int fd;
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void *addr;
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size_t len;
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ssize_t *nwp;
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{
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size_t offset;
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ssize_t nw;
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u_int8_t *taddr;
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for (taddr = addr,
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offset = 0; offset < len; taddr += nw, offset += nw)
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if ((nw = __os_write(fd, taddr, len - offset)) < 0)
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return (errno);
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*nwp = len;
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return (0);
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}
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