Make getline POSIX compliant w.r.t. numeric strings.

ChangeLog

@@ -1,3 +1,8 @@
+2019-01-25         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* run.c (awkgetline): Check for numeric value in all getline
+	variants. See the numeric-getline.* files in bugs-fixed directory.
+
 2018-08-29         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* REGRESS: Check for existence of a.out. If not there, run

bugs-fixed/README

@@ -51,4 +51,7 @@ array passed as the second argument, then split() would previously read
 from the freed memory and possibly produce incorrect results (depending
 on the system's malloc()/free() behaviour.)
 
-
+15. getline-numeric: The `getline xx < file' syntax did not check if
+values were numeric, in discordance from POSIX. Test case adapted from
+one posted by Ben Bacarisse <ben.usenet@bsb.me.uk> in comp.lang.awk,
+January 2019.

bugs-fixed/getline-numeric.awk

@@ -0,0 +1,6 @@
+{
+    print $0, ($0 <= 50 ? "<=" : ">"), 50
+    getline dd < ARGV[1]
+    print dd, (dd <= 50 ? "<=" : ">"), 50
+    if (dd == $0) print "same"
+}

bugs-fixed/getline-numeric.bad

@@ -0,0 +1,6 @@
+120 > 50
+120 <= 50
+same
+120 > 50
+120 <= 50
+same

bugs-fixed/getline-numeric.in

@@ -0,0 +1,2 @@
+120
+120

bugs-fixed/getline-numeric.ok

@@ -0,0 +1,6 @@
+120 > 50
+120 > 50
+same
+120 > 50
+120 > 50
+same

run.c

@@ -425,6 +425,10 @@ Cell *awkgetline(Node **a, int n)	/* get next line from specific input */
 		} else if (a[0] != NULL) {	/* getline var <file */
 			x = execute(a[0]);
 			setsval(x, buf);
+			if (is_number(x->sval)) {
+				x->fval = atof(x->sval);
+				x->tval |= NUM;
+			}
 			tempfree(x);
 		} else {			/* getline <file */
 			setsval(fldtab[0], buf);
@@ -440,6 +444,10 @@ Cell *awkgetline(Node **a, int n)	/* get next line from specific input */
 			n = getrec(&buf, &bufsize, 0);
 			x = execute(a[0]);
 			setsval(x, buf);
+			if (is_number(x->sval)) {
+				x->fval = atof(x->sval);
+				x->tval |= NUM;
+			}
 			tempfree(x);
 		}
 	}