support OE/MVS

	Message-Id: <199808010903.MAA09371@alpha.hut.fi>
	Subject: [PATCH] 5.005_01: OE MVS

p4raw-id: //depot/maint-5.005/perl@1697

1 files changed, 32 insertions, 0 deletions

diff --git a/ebcdic.c b/ebcdic.c
new file mode 100644
index 0000000000..890bd086d2
--- /dev/null
+++ b/ebcdic.c
@@ -0,0 +1,32 @@
+#include "EXTERN.h"
+#include "perl.h"
+
+/* in ASCII order, not that it matters */
+static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
+ 
+int
+ebcdic_control(int ch)
+{
+    	if (ch > 'a') {
+	        char *ctlp;
+ 
+ 	       if (islower(ch))
+  	              ch = toupper(ch);
+ 
+ 	       if ((ctlp = strchr(controllablechars, ch)) == 0) {
+  	              die("unrecognised control character '%c'\n", ch);
+     	       }
+ 
+        	if (ctlp == controllablechars)
+         	       return('\177'); /* DEL */
+        	else
+         	       return((unsigned char)(ctlp - controllablechars - 1));
+	} else { /* Want uncontrol */
+        	if (ch == '\177' || ch == -1)
+                	return('?');
+        	else if (0 < ch && ch < (sizeof(controllablechars) - 1))
+                	return(controllablechars[ch+1]);
+        	else
+                	die("invalid control request: '\\%03o'\n", ch & 0xFF);
+	}
+}