MinGW: a helper function that translates Win32 API error codes

This function translates many possible Win32 error codes to suitable
errno numbers.  We will use it in our wrapper functions that need to call
into Win32.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 113 insertions, 0 deletions

diff --git a/compat/mingw.c b/compat/mingw.c
index 27bcf3fd6..f66ad56aa 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -4,6 +4,119 @@
 
 unsigned int _CRT_fmode = _O_BINARY;
 
+static int err_win_to_posix(DWORD winerr)
+{
+	int error = ENOSYS;
+	switch(winerr) {
+	case ERROR_ACCESS_DENIED: error = EACCES; break;
+	case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
+	case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
+	case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
+	case ERROR_ALREADY_EXISTS: error = EEXIST; break;
+	case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
+	case ERROR_BAD_COMMAND: error = EIO; break;
+	case ERROR_BAD_DEVICE: error = ENODEV; break;
+	case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
+	case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
+	case ERROR_BAD_FORMAT: error = ENOEXEC; break;
+	case ERROR_BAD_LENGTH: error = EINVAL; break;
+	case ERROR_BAD_PATHNAME: error = ENOENT; break;
+	case ERROR_BAD_PIPE: error = EPIPE; break;
+	case ERROR_BAD_UNIT: error = ENODEV; break;
+	case ERROR_BAD_USERNAME: error = EINVAL; break;
+	case ERROR_BROKEN_PIPE: error = EPIPE; break;
+	case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
+	case ERROR_BUSY: error = EBUSY; break;
+	case ERROR_BUSY_DRIVE: error = EBUSY; break;
+	case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
+	case ERROR_CANNOT_MAKE: error = EACCES; break;
+	case ERROR_CANTOPEN: error = EIO; break;
+	case ERROR_CANTREAD: error = EIO; break;
+	case ERROR_CANTWRITE: error = EIO; break;
+	case ERROR_CRC: error = EIO; break;
+	case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
+	case ERROR_DEVICE_IN_USE: error = EBUSY; break;
+	case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
+	case ERROR_DIRECTORY: error = EINVAL; break;
+	case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
+	case ERROR_DISK_CHANGE: error = EIO; break;
+	case ERROR_DISK_FULL: error = ENOSPC; break;
+	case ERROR_DRIVE_LOCKED: error = EBUSY; break;
+	case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
+	case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
+	case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
+	case ERROR_FILE_EXISTS: error = EEXIST; break;
+	case ERROR_FILE_INVALID: error = ENODEV; break;
+	case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
+	case ERROR_GEN_FAILURE: error = EIO; break;
+	case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
+	case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
+	case ERROR_INVALID_ACCESS: error = EACCES; break;
+	case ERROR_INVALID_ADDRESS: error = EFAULT; break;
+	case ERROR_INVALID_BLOCK: error = EFAULT; break;
+	case ERROR_INVALID_DATA: error = EINVAL; break;
+	case ERROR_INVALID_DRIVE: error = ENODEV; break;
+	case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
+	case ERROR_INVALID_FLAGS: error = EINVAL; break;
+	case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
+	case ERROR_INVALID_HANDLE: error = EBADF; break;
+	case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
+	case ERROR_INVALID_NAME: error = EINVAL; break;
+	case ERROR_INVALID_OWNER: error = EINVAL; break;
+	case ERROR_INVALID_PARAMETER: error = EINVAL; break;
+	case ERROR_INVALID_PASSWORD: error = EPERM; break;
+	case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
+	case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
+	case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
+	case ERROR_INVALID_WORKSTATION: error = EACCES; break;
+	case ERROR_IO_DEVICE: error = EIO; break;
+	case ERROR_IO_INCOMPLETE: error = EINTR; break;
+	case ERROR_LOCKED: error = EBUSY; break;
+	case ERROR_LOCK_VIOLATION: error = EACCES; break;
+	case ERROR_LOGON_FAILURE: error = EACCES; break;
+	case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
+	case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
+	case ERROR_MORE_DATA: error = EPIPE; break;
+	case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
+	case ERROR_NOACCESS: error = EFAULT; break;
+	case ERROR_NONE_MAPPED: error = EINVAL; break;
+	case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
+	case ERROR_NOT_READY: error = EAGAIN; break;
+	case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
+	case ERROR_NO_DATA: error = EPIPE; break;
+	case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
+	case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
+	case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
+	case ERROR_OPEN_FAILED: error = EIO; break;
+	case ERROR_OPEN_FILES: error = EBUSY; break;
+	case ERROR_OPERATION_ABORTED: error = EINTR; break;
+	case ERROR_OUTOFMEMORY: error = ENOMEM; break;
+	case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
+	case ERROR_PATH_BUSY: error = EBUSY; break;
+	case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
+	case ERROR_PIPE_BUSY: error = EBUSY; break;
+	case ERROR_PIPE_CONNECTED: error = EPIPE; break;
+	case ERROR_PIPE_LISTENING: error = EPIPE; break;
+	case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
+	case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
+	case ERROR_READ_FAULT: error = EIO; break;
+	case ERROR_SEEK: error = EIO; break;
+	case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
+	case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
+	case ERROR_SHARING_VIOLATION: error = EACCES; break;
+	case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
+	case ERROR_SWAPERROR: error = ENOENT; break;
+	case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
+	case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
+	case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
+	case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
+	case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
+	case ERROR_WRITE_FAULT: error = EIO; break;
+	case ERROR_WRITE_PROTECT: error = EROFS; break;
+	}
+	return error;
+}
+
 #undef open
 int mingw_open (const char *filename, int oflags, ...)
 {