1 files changed, 116 insertions, 0 deletions
diff --git a/include/sane/sanei_backend.h b/include/sane/sanei_backend.h
new file mode 100644
index 0000000..588e2d0
--- /dev/null
+++ b/include/sane/sanei_backend.h
@@ -0,0 +1,116 @@
+#include <sane/sanei_debug.h>
+
+#ifdef HAVE_SYS_HW_H
+  /* OS/2 i/o-port access compatibility macros: */
+# define inb(p)		_inp8 (p)
+# define outb(v,p)	_outp8 ((p),(v))
+# define ioperm(b,l,o)	_portaccess ((b),(b)+(l)-1)
+# define HAVE_IOPERM	1
+#endif
+
+#ifndef O_NONBLOCK
+# ifdef O_NDELAY
+#  define O_NONBLOCK O_NDELAY
+# else
+#  define O_NONBLOCK FNDELAY	/* last resort */
+# endif
+#endif
+
+#ifndef __GLIBC__
+# ifndef u_int8_t
+#  define u_int8_t	unsigned char
+# endif
+# ifndef u_int16_t
+#  define u_int16_t	unsigned short
+# endif
+# ifndef u_int32_t
+#  define u_int32_t	unsigned int
+# endif
+#endif
+
+#ifdef HAVE_SIGPROCMASK
+# define SIGACTION	sigaction
+#else
+
+/* Just enough backwards compatibility that we get by in the backends
+   without making handstands.  */
+# ifdef sigset_t
+#  undef sigset_t
+# endif
+# ifdef sigemptyset
+#  undef sigemptyset
+# endif
+# ifdef sigfillset
+#  undef sigfillset
+# endif
+# ifdef sigaddset
+#  undef sigaddset
+# endif
+# ifdef sigdelset
+#  undef sigdelset
+# endif
+# ifdef sigprocmask
+#  undef sigprocmask
+# endif
+# ifdef SIG_BLOCK
+#  undef SIG_BLOCK
+# endif
+# ifdef SIG_UNBLOCK
+#  undef SIG_UNBLOCK
+# endif
+# ifdef SIG_SETMASK
+#  undef SIG_SETMASK
+# endif
+
+# define sigset_t		int
+# define sigemptyset(set)	do { *(set) = 0; } while (0)
+# define sigfillset(set)	do { *(set) = ~0; } while (0)
+# define sigaddset(set,signal)	do { *(set) |= sigmask (signal); } while (0)
+# define sigdelset(set,signal)	do { *(set) &= ~sigmask (signal); } while (0)
+# define sigaction(sig,new,old)	sigvec (sig,new,old)
+
+  /* Note: it's not safe to just declare our own "struct sigaction" since
+     some systems (e.g., some versions of OpenStep) declare that structure,
+     but do not implement sigprocmask().  Hard to believe, aint it?  */
+# define SIGACTION		sigvec
+# define SIG_BLOCK	1
+# define SIG_UNBLOCK	2
+# define SIG_SETMASK	3
+#endif /* !HAVE_SIGPROCMASK */
+
+/* Declare the entry points: */
+
+extern SANE_Status ENTRY(init) (SANE_Int *, SANE_Auth_Callback);
+extern SANE_Status ENTRY(get_devices) (const SANE_Device ***, SANE_Bool);
+extern SANE_Status ENTRY(open) (SANE_String_Const, SANE_Handle *);
+extern const SANE_Option_Descriptor *
+  ENTRY(get_option_descriptor) (SANE_Handle, SANE_Int);
+extern SANE_Status ENTRY(control_option) (SANE_Handle, SANE_Int, SANE_Action,
+					  void *, SANE_Word *);
+extern SANE_Status ENTRY(get_parameters) (SANE_Handle, SANE_Parameters *);
+extern SANE_Status ENTRY(start) (SANE_Handle);
+extern SANE_Status ENTRY(read) (SANE_Handle, SANE_Byte *, SANE_Int,
+				SANE_Int *);
+extern SANE_Status ENTRY(set_io_mode) (SANE_Handle, SANE_Bool);
+extern SANE_Status ENTRY(get_select_fd) (SANE_Handle, SANE_Int *);
+extern void ENTRY(cancel) (SANE_Handle);
+extern void ENTRY(close) (SANE_Handle);
+extern void ENTRY(exit) (void);
+
+#ifndef STUBS
+/* Now redirect sane_* calls to backend's functions: */
+
+#define sane_init(a,b)			ENTRY(init) (a,b)
+#define sane_get_devices(a,b)		ENTRY(get_devices) (a,b)
+#define sane_open(a,b)			ENTRY(open) (a,b)
+#define sane_get_option_descriptor(a,b)	ENTRY(get_option_descriptor) (a,b)
+#define sane_control_option(a,b,c,d,e)	ENTRY(control_option) (a,b,c,d,e)
+#define sane_get_parameters(a,b)	ENTRY(get_parameters) (a,b)
+#define sane_start(a)			ENTRY(start) (a)
+#define sane_read(a,b,c,d)		ENTRY(read) (a,b,c,d)
+#define sane_set_io_mode(a,b)		ENTRY(set_io_mode) (a,b)
+#define sane_get_select_fd(a,b)		ENTRY(get_select_fd) (a,b)
+#define sane_cancel(a)			ENTRY(cancel) (a)
+#define sane_close(a)			ENTRY(close) (a)
+#define sane_exit(a)			ENTRY(exit) (a)
+#endif /* STUBS */