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/***********************************************************************/
/* */
/* Objective Caml */
/* */
/* Xavier Leroy and Pascal Cuoq, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* Automatique. Distributed only by permission. */
/* */
/***********************************************************************/
/* $Id$ */
#include <mlvalues.h>
#include <alloc.h>
#include "unixsupport.h"
#include <fcntl.h>
static int open_access_flags[8] = {
GENERIC_READ, GENERIC_WRITE, GENERIC_READ|GENERIC_WRITE, 0, 0, 0, 0, 0,
};
static int open_create_flags[8] = {
0, 0, 0, 0, 0, O_CREAT, O_TRUNC, O_EXCL
};
value unix_open(value path, value flags, value perm) /* ML */
{
int fileaccess, createflags, fileattrib, filecreate;
SECURITY_ATTRIBUTES attr;
HANDLE h;
fileaccess = convert_flag_list(flags, open_access_flags);
createflags = convert_flag_list(flags, open_create_flags);
if ((createflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
filecreate = CREATE_NEW;
else if ((createflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
filecreate = CREATE_ALWAYS;
else if (createflags & O_TRUNC)
filecreate = TRUNCATE_EXISTING;
else if (createflags & O_CREAT)
filecreate = OPEN_ALWAYS;
else
filecreate = OPEN_EXISTING;
if ((createflags & O_CREAT) && (Int_val(perm) & 0200) == 0)
fileattrib = FILE_ATTRIBUTE_READONLY;
else
fileattrib = FILE_ATTRIBUTE_NORMAL;
attr.nLength = sizeof(attr);
attr.lpSecurityDescriptor = NULL;
attr.bInheritHandle = TRUE;
h = CreateFile(String_val(path), fileaccess, 0, &attr,
filecreate, fileattrib, NULL);
if (h == INVALID_HANDLE_VALUE) {
_dosmaperr(GetLastError());
uerror("open", path);
}
return win_alloc_handle(h);
}
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