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[unix-history] / usr / src / old / awk / awk.def

diff --git a/usr/src/old/awk/awk.def b/usr/src/old/awk/awk.def
index bcde4a0..215a0b7 100644 (file)
--- a/usr/src/old/awk/awk.def
+++ b/usr/src/old/awk/awk.def
@@ -1,10 +1,12 @@
-/*     awk.def 4.2     83/02/09        */
+/*     awk.def 4.3     83/12/09        */

 
 #define hack   int
 #define        AWKFLOAT        float
 #define        xfree(a)        { if(a!=NULL) { yfree(a); a=NULL;} }
 #define        strfree(a)      { if(a!=NULL && a!=EMPTY) { yfree(a);} a=EMPTY; }
 #define yfree free
 
 #define hack   int
 #define        AWKFLOAT        float
 #define        xfree(a)        { if(a!=NULL) { yfree(a); a=NULL;} }
 #define        strfree(a)      { if(a!=NULL && a!=EMPTY) { yfree(a);} a=EMPTY; }
 #define yfree free

+#define        isnull(x)       ((x) == EMPTY || (x) == NULL)
+

 #ifdef DEBUG
 #      define  dprintf if(dbg)printf
 #else
 #ifdef DEBUG
 #      define  dprintf if(dbg)printf
 #else