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64-bit _llseek() support for the future.
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icculus committed Jun 6, 2002
1 parent 6fd0450 commit 81a9df44bcbb9832c7468a286feb77a72cfa93ea
Showing with 25 additions and 4 deletions.
  1. +25 −4 platform/posix.c
@@ -43,6 +43,10 @@
#include <fcntl.h>
#include <assert.h>

#ifdef PHYSFS_HAVE_LLSEEK
#include <linux/unistd.h>
#endif

#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"

@@ -429,8 +433,15 @@ int __PHYSFS_platformSeek(void *opaque, PHYSFS_uint64 pos)
{
int fd = *((int *) opaque);

/* !!! FIXME: Use llseek where available. */
BAIL_IF_MACRO(lseek(fd, (int) pos, SEEK_SET) == -1, strerror(errno), 0);
#ifdef PHYSFS_HAVE_LLSEEK
unsigned long offset_high = ((pos >> 32) & 0xFFFFFFFF);
unsigned long offset_low = (pos & 0xFFFFFFFF);
loff_t retoffset;
int rc = llseek(fd, offset_high, offset_low, &retoffset, SEEK_SET);
BAIL_IF_MACRO(rc == -1, strerror(errno), 0);
#else
BAIL_IF_MACRO(lseek(fd, (int) pos, SEEK_SET) == -1, strerror(errno), 0);
#endif

return(1);
} /* __PHYSFS_platformSeek */
@@ -439,8 +450,18 @@ int __PHYSFS_platformSeek(void *opaque, PHYSFS_uint64 pos)
PHYSFS_sint64 __PHYSFS_platformTell(void *opaque)
{
int fd = *((int *) opaque);
PHYSFS_sint64 retval = lseek(fd, 0, SEEK_CUR);
BAIL_IF_MACRO(retval == -1, strerror(errno), -1);
PHYSFS_sint64 retval;

#ifdef PHYSFS_HAVE_LLSEEK
loff_t retoffset;
int rc = llseek(fd, 0, &retoffset, SEEK_CUR);
BAIL_IF_MACRO(rc == -1, strerror(errno), -1);
retval = (PHYSFS_sint64) retoffset;
#else
retval = (PHYSFS_sint64) lseek(fd, 0, SEEK_CUR);
BAIL_IF_MACRO(retval == -1, strerror(errno), -1);
#endif

return(retval);
} /* __PHYSFS_platformTell */

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