* *.h: Use SCM_NIMP(X) && in all the FOOP macros.

[bpt/guile.git] / libguile / fports.h

diff --git a/libguile/fports.h b/libguile/fports.h
index 78619c7..dcd0f19 100644 (file)
--- a/libguile/fports.h
+++ b/libguile/fports.h
@@ -42,6 +42,9 @@
  * If you write modifications of your own for GUILE, it is your choice
  * whether to permit this exception to apply to your modifications.
  * If you do not wish that, delete this exception notice.  */
+
+/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
+   gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
 \f
 
 #include "libguile/__scm.h"
@@ -58,10 +61,10 @@ struct scm_fport {
 #define SCM_FSTREAM(x) ((struct scm_fport *) SCM_STREAM (x))
 #define SCM_FPORT_FDES(x) (SCM_FSTREAM (x)->fdes)
 
-#define SCM_FPORTP(x) (SCM_TYP16S(x)==scm_tc7_port)
-#define SCM_OPFPORTP(x) (((0xfeff | SCM_OPN) & SCM_CAR(x))==(scm_tc7_port | SCM_OPN))
-#define SCM_OPINFPORTP(x) (((0xfeff | SCM_OPN | SCM_RDNG) & SCM_CAR(x))==(scm_tc7_port | SCM_OPN | SCM_RDNG))
-#define SCM_OPOUTFPORTP(x) (((0xfeff | SCM_OPN | SCM_WRTNG) & SCM_CAR(x))==(scm_tc7_port | SCM_OPN | SCM_WRTNG))
+#define SCM_FPORTP(x) (SCM_NIMP(x) && (SCM_TYP16S(x)==scm_tc7_port))
+#define SCM_OPFPORTP(x) (SCM_NIMP(x) && (((0xfeff | SCM_OPN) & SCM_CAR(x))==(scm_tc7_port | SCM_OPN)))
+#define SCM_OPINFPORTP(x) (SCM_NIMP(x) && (((0xfeff | SCM_OPN | SCM_RDNG) & SCM_CAR(x))==(scm_tc7_port | SCM_OPN | SCM_RDNG)))
+#define SCM_OPOUTFPORTP(x) (SCM_NIMP(x) && (((0xfeff | SCM_OPN | SCM_WRTNG) & SCM_CAR(x))==(scm_tc7_port | SCM_OPN | SCM_WRTNG)))
 
 /* test whether fdes supports random access.  */
 #define SCM_FDES_RANDOM_P(fdes) ((lseek (fdes, 0, SEEK_CUR) == -1) ? 0 : 1)