Clarify a comment in errno2.h

[perl5.git] / win32 / win32io.c

diff --git a/win32/win32io.c b/win32/win32io.c
index 80185fe..d183e3b 100644 (file)
--- a/win32/win32io.c
+++ b/win32/win32io.c
@@ -256,9 +256,13 @@ PerlIOWin32_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
 {
  static const DWORD where[3] = { FILE_BEGIN, FILE_CURRENT, FILE_END };
  PerlIOWin32 *s = PerlIOSelf(f,PerlIOWin32);
- DWORD high = (sizeof(offset) > sizeof(DWORD)) ? (DWORD)(offset >> 32) : 0;
+#if Off_t_size >= 8
+ DWORD high = (DWORD)(offset >> 32);
+#else
+ DWORD high = 0;
+#endif
  DWORD low  = (DWORD) offset;
- DWORD res  = SetFilePointer(s->h,low,&high,where[whence]);
+ DWORD res  = SetFilePointer(s->h,(LONG)low,(LONG *)&high,where[whence]);
  if (res != 0xFFFFFFFF || GetLastError() != NO_ERROR)
   {
    return 0;
@@ -274,10 +278,14 @@ PerlIOWin32_tell(pTHX_ PerlIO *f)
 {
  PerlIOWin32 *s = PerlIOSelf(f,PerlIOWin32);
  DWORD high = 0;
- DWORD res  = SetFilePointer(s->h,0,&high,FILE_CURRENT);
+ DWORD res  = SetFilePointer(s->h,0,(LONG *)&high,FILE_CURRENT);
  if (res != 0xFFFFFFFF || GetLastError() != NO_ERROR)
   {
+#if Off_t_size >= 8
    return ((Off_t) high << 32) | res;
+#else
+   return res;
+#endif
   }
  return (Off_t) -1;
 }
@@ -309,18 +317,18 @@ PerlIOWin32_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *params, int flags)
 {
  PerlIOWin32 *os = PerlIOSelf(f,PerlIOWin32);
  HANDLE proc = GetCurrentProcess();
- HANDLE new;
- if (DuplicateHandle(proc, os->h, proc, &new, 0, FALSE,  DUPLICATE_SAME_ACCESS))
+ HANDLE new_h;
+ if (DuplicateHandle(proc, os->h, proc, &new_h, 0, FALSE,  DUPLICATE_SAME_ACCESS))
   {
    char mode[8];
-   int fd = win32_open_osfhandle((intptr_t) new, PerlIOUnix_oflags(PerlIO_modestr(o,mode)));
+   int fd = win32_open_osfhandle((intptr_t) new_h, PerlIOUnix_oflags(PerlIO_modestr(o,mode)));
    if (fd >= 0)
     {
      f = PerlIOBase_dup(aTHX_ f, o, params, flags);
      if (f)
       {
        PerlIOWin32 *fs = PerlIOSelf(f,PerlIOWin32);
-       fs->h  = new;
+       fs->h  = new_h;
        fs->fd = fd;
        fs->refcnt = 1;
        fdtable[fd] = fs;
@@ -334,7 +342,7 @@ PerlIOWin32_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *params, int flags)
     }
    else
     {
-     CloseHandle(new);
+     CloseHandle(new_h);
     }
   }
  return f;