ING_DB

WEGA/contrib/ingres/dbs/src/eql/getkey.c

@@ -0,0 +1,50 @@
+# include	<stdio.h>
+# include	"gen.h"
+# include	"constants.h"
+# include	"globals.h"
+
+/*
+**  GETKEY -- Get the optab entry for a keyword
+**
+**	Performs a binary search through Kwrdtab
+**	for a given keyword.
+**
+**	Parameters:
+**		key -- char * to the keywords character
+**			representation.
+**
+**	Returns:
+**		a pointer to the optab struct node for that
+**		keyword, or 0 if not found.
+*/
+struct optab	*getkey(key)
+char		*key;
+{
+	register struct optab	*op;
+	register int		k;
+	register int		top;
+	register int		bot;
+
+	op = Kwrdtab;
+	bot = 0;
+	top = Kwrdnum - 1;
+	do
+	{
+		k = (top + bot) / 2;
+		switch (AAscompare(key, 0, op[k].op_term, 0))
+		{
+
+		  case 1 :
+			bot = k + 1;
+			break;
+
+		  case 0 :
+			return (&op[k]);
+
+		  case -1 :
+			top = k - 1;
+			break;
+		}
+	} while (bot <= top);
+	return (0);
+}