-/* Define the macros to access a single-int bitmap of descriptors. */
-#define FD_SET(n, p) (*(p) |= (1 << (n)))
-#define FD_CLR(n, p) (*(p) &= ~(1 << (n)))
-#define FD_ISSET(n, p) (*(p) & (1 << (n)))
-#define FD_ZERO(p) (*(p) = 0)
-#endif /* no FD_SET */
+/* ------------------------------------------------------------------------- */
+
+/* child_process.status values */
+enum {
+ STATUS_READ_ERROR = -1,
+ STATUS_READ_READY,
+ STATUS_READ_IN_PROGRESS,
+ STATUS_READ_FAILED,
+ STATUS_READ_SUCCEEDED,
+ STATUS_READ_ACKNOWLEDGED
+};
+
+/* This structure is used for both pipes and sockets; for
+ a socket, the process handle in pi is NULL. */
+typedef struct _child_process
+{
+ int fd;
+ int pid;
+ HANDLE char_avail;
+ HANDLE char_consumed;
+ HANDLE thrd;
+ HWND hwnd;
+ PROCESS_INFORMATION procinfo;
+ volatile int status;
+ char chr;
+} child_process;
+
+#define MAXDESC FD_SETSIZE
+#define MAX_CHILDREN MAXDESC/2
+#define CHILD_ACTIVE(cp) ((cp)->char_avail != NULL)
+
+/* parallel array of private info on file handles */
+typedef struct
+{
+ unsigned flags;
+ HANDLE hnd;
+ child_process * cp;
+} filedesc;
+
+extern filedesc fd_info [ MAXDESC ];
+
+/* fd_info flag definitions */
+#define FILE_READ 0x0001
+#define FILE_WRITE 0x0002
+#define FILE_BINARY 0x0010
+#define FILE_LAST_CR 0x0020
+#define FILE_AT_EOF 0x0040
+#define FILE_SEND_SIGCHLD 0x0080
+#define FILE_PIPE 0x0100
+#define FILE_SOCKET 0x0200
+#define FILE_NDELAY 0x0400
+
+extern child_process * new_child (void);
+extern void delete_child (child_process *cp);
+
+/* ------------------------------------------------------------------------- */
+
+/* Equivalent of strerror for W32 error codes. */
+extern char * w32_strerror (int error_no);
+
+/* Get long (aka "true") form of file name, if it exists. */
+extern BOOL w32_get_long_filename (char * name, char * buf, int size);