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Win32Utils.c
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Win32Utils.c
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/* ----------------------------------------------------------------------------
(c) The University of Glasgow 2006
Useful Win32 bits
------------------------------------------------------------------------- */
#if defined(_MSC_VER) || defined(__MINGW32__) || defined(_WIN32)
#include "HsBase.h"
/* This is the error table that defines the mapping between OS error
codes and errno values */
struct errentry {
unsigned long oscode; /* OS return value */
int errnocode; /* System V error code */
};
static struct errentry errtable[] = {
{ ERROR_INVALID_FUNCTION, EINVAL }, /* 1 */
{ ERROR_FILE_NOT_FOUND, ENOENT }, /* 2 */
{ ERROR_PATH_NOT_FOUND, ENOENT }, /* 3 */
{ ERROR_TOO_MANY_OPEN_FILES, EMFILE }, /* 4 */
{ ERROR_ACCESS_DENIED, EACCES }, /* 5 */
{ ERROR_INVALID_HANDLE, EBADF }, /* 6 */
{ ERROR_ARENA_TRASHED, ENOMEM }, /* 7 */
{ ERROR_NOT_ENOUGH_MEMORY, ENOMEM }, /* 8 */
{ ERROR_INVALID_BLOCK, ENOMEM }, /* 9 */
{ ERROR_BAD_ENVIRONMENT, E2BIG }, /* 10 */
{ ERROR_BAD_FORMAT, ENOEXEC }, /* 11 */
{ ERROR_INVALID_ACCESS, EINVAL }, /* 12 */
{ ERROR_INVALID_DATA, EINVAL }, /* 13 */
{ ERROR_INVALID_DRIVE, ENOENT }, /* 15 */
{ ERROR_CURRENT_DIRECTORY, EACCES }, /* 16 */
{ ERROR_NOT_SAME_DEVICE, EXDEV }, /* 17 */
{ ERROR_NO_MORE_FILES, ENOENT }, /* 18 */
{ ERROR_LOCK_VIOLATION, EACCES }, /* 33 */
{ ERROR_BAD_NETPATH, ENOENT }, /* 53 */
{ ERROR_NETWORK_ACCESS_DENIED, EACCES }, /* 65 */
{ ERROR_BAD_NET_NAME, ENOENT }, /* 67 */
{ ERROR_FILE_EXISTS, EEXIST }, /* 80 */
{ ERROR_CANNOT_MAKE, EACCES }, /* 82 */
{ ERROR_FAIL_I24, EACCES }, /* 83 */
{ ERROR_INVALID_PARAMETER, EINVAL }, /* 87 */
{ ERROR_NO_PROC_SLOTS, EAGAIN }, /* 89 */
{ ERROR_DRIVE_LOCKED, EACCES }, /* 108 */
{ ERROR_BROKEN_PIPE, EPIPE }, /* 109 */
{ ERROR_DISK_FULL, ENOSPC }, /* 112 */
{ ERROR_INVALID_TARGET_HANDLE, EBADF }, /* 114 */
{ ERROR_INVALID_HANDLE, EINVAL }, /* 124 */
{ ERROR_WAIT_NO_CHILDREN, ECHILD }, /* 128 */
{ ERROR_CHILD_NOT_COMPLETE, ECHILD }, /* 129 */
{ ERROR_DIRECT_ACCESS_HANDLE, EBADF }, /* 130 */
{ ERROR_NEGATIVE_SEEK, EINVAL }, /* 131 */
{ ERROR_SEEK_ON_DEVICE, EACCES }, /* 132 */
{ ERROR_DIR_NOT_EMPTY, ENOTEMPTY }, /* 145 */
{ ERROR_NOT_LOCKED, EACCES }, /* 158 */
{ ERROR_BAD_PATHNAME, ENOENT }, /* 161 */
{ ERROR_MAX_THRDS_REACHED, EAGAIN }, /* 164 */
{ ERROR_LOCK_FAILED, EACCES }, /* 167 */
{ ERROR_ALREADY_EXISTS, EEXIST }, /* 183 */
{ ERROR_FILENAME_EXCED_RANGE, ENOENT }, /* 206 */
{ ERROR_NESTING_NOT_ALLOWED, EAGAIN }, /* 215 */
/* Windows returns this when the read end of a pipe is
* closed (or closing) and we write to it. */
{ ERROR_NO_DATA, EPIPE }, /* 232 */
{ ERROR_NOT_ENOUGH_QUOTA, ENOMEM } /* 1816 */
};
/* size of the table */
#define ERRTABLESIZE (sizeof(errtable)/sizeof(errtable[0]))
/* The following two constants must be the minimum and maximum
values in the (contiguous) range of Exec Failure errors. */
#define MIN_EXEC_ERROR ERROR_INVALID_STARTING_CODESEG
#define MAX_EXEC_ERROR ERROR_INFLOOP_IN_RELOC_CHAIN
/* These are the low and high value in the range of errors that are
access violations */
#define MIN_EACCES_RANGE ERROR_WRITE_PROTECT
#define MAX_EACCES_RANGE ERROR_SHARING_BUFFER_EXCEEDED
void maperrno(void)
{
errno = maperrno_func(GetLastError());
}
int maperrno_func(DWORD dwErrorCode)
{
int i;
/* check the table for the OS error code */
for (i = 0; i < ERRTABLESIZE; ++i)
if (dwErrorCode == errtable[i].oscode)
return errtable[i].errnocode;
/* The error code wasn't in the table. We check for a range of */
/* EACCES errors or exec failure errors (ENOEXEC). Otherwise */
/* EINVAL is returned. */
if (dwErrorCode >= MIN_EACCES_RANGE && dwErrorCode <= MAX_EACCES_RANGE)
return EACCES;
else if (dwErrorCode >= MIN_EXEC_ERROR && dwErrorCode <= MAX_EXEC_ERROR)
return ENOEXEC;
else
return EINVAL;
}
LPWSTR base_getErrorMessage(DWORD err)
{
LPWSTR what;
DWORD res;
res = FormatMessageW(
(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER),
NULL,
err,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), /* Default language */
(LPWSTR) &what,
0,
NULL
);
if (res == 0)
return NULL;
return what;
}
int get_unique_file_info(int fd, HsWord64 *dev, HsWord64 *ino)
{
HANDLE h = (HANDLE)_get_osfhandle(fd);
BY_HANDLE_FILE_INFORMATION info;
if (GetFileInformationByHandle(h, &info))
{
*dev = info.dwVolumeSerialNumber;
*ino = info.nFileIndexLow
| ((HsWord64)info.nFileIndexHigh << 32);
return 0;
}
return -1;
}
BOOL file_exists(LPCTSTR path)
{
DWORD r = GetFileAttributes(path);
return r != INVALID_FILE_ATTRIBUTES;
}
#endif