From 03fcf2fcc9e751244339c3773a608a59a66f59e8 Mon Sep 17 00:00:00 2001
From: Gurusamy Sarathy <gsar@cpan.org>
Date: Mon, 24 Apr 2000 07:08:42 +0000
Subject: commentary about IoTYPE() (from Nathan Torkington)

p4raw-id: //depot/perl@5922
---
 sv.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'sv.h')

diff --git a/sv.h b/sv.h
index 245199fbfc..c0ce96783d 100644
--- a/sv.h
+++ b/sv.h
@@ -708,6 +708,19 @@ Set the length of the string which is in the SV.  See C<SvCUR>.
 #define IoTYPE(sv)	((XPVIO*)  SvANY(sv))->xio_type
 #define IoFLAGS(sv)	((XPVIO*)  SvANY(sv))->xio_flags
 
+/*
+IoTYPE(sv) is a single character saying what type of I/O connection
+this is:
+    |        pipe
+    -        stdin or stdout
+    <        read-only
+    >        write-only
+    a        append
+    +        read and write
+    s        socket
+    space    closed
+*/
+
 /*
 =for apidoc Am|bool|SvTAINTED|SV* sv
 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
-- 
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