Index: ossp-pkg/sio/list.h
RCS File: /v/ossp/cvs/ossp-pkg/sio/list.h,v
co -q -kk -p'1.1' '/v/ossp/cvs/ossp-pkg/sio/list.h,v' | diff -u /dev/null - -L'ossp-pkg/sio/list.h' 2>/dev/null
--- ossp-pkg/sio/list.h
+++ -	2025-05-20 13:31:30.045646741 +0200
@@ -0,0 +1,160 @@
+/*
+**  OSSP al -- Assembly Line
+**  Copyright (c) 2002 The OSSP Project <http://www.ossp.org/>
+**  Copyright (c) 2002 Cable & Wireless Deutschland <http://www.cw.com/de/>
+**  Copyright (c) 2002 Ralf S. Engelschall <rse@engelschall.com>
+**  Copyright (c) 2002 Michael van Elst <mlelstv@dev.de.cw.net>
+**
+**  This file is part of OSSP al, an abstract datatype of a data buffer
+**  that can assemble, move and truncate data but avoids actual copying.
+**
+**  Permission to use, copy, modify, and distribute this software for
+**  any purpose with or without fee is hereby granted, provided that
+**  the above copyright notice and this permission notice appear in all
+**  copies.
+**
+**  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+**  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+**  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+**  IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
+**  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+**  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+**  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+**  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+**  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+**  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+**  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+**  SUCH DAMAGE.
+**
+**  list.h: generic double-linked list macros
+*/
+
+#define LIST(elem) \
+    struct { elem *head, *tail; }
+#define NODE(elem) \
+    struct { elem *next, *prev; }
+
+#define HEAD(q,l)       ((q)->l.head)
+#define TAIL(q,l)       ((q)->l.tail)
+#define NEXT(n,l)       ((n)->l.next)
+#define PREV(n,l)       ((n)->l.prev)
+
+#define ISEMPTY(q,l)    (HEAD(q,l) == NULL)
+
+#define LISTINIT(q,l) \
+do { \
+    HEAD(q,l) = NULL; \
+    TAIL(q,l) = NULL;  \
+} while(0)
+
+#define NODEINIT(n,l) \
+do { \
+    NEXT(n,l) = NULL; \
+    PREV(n,l) = NULL; \
+} while(0)
+
+#define ADDTAIL(q,l,n) \
+do { \
+    if (TAIL(q,l)) { \
+        NEXT(TAIL(q,l),l) = (n); \
+        PREV(n,l) = TAIL(q,l); \
+    } else { \
+        PREV(n,l) = NULL; \
+        HEAD(q,l) = (n); \
+    } \
+    TAIL(q,l) = (n); \
+    NEXT(n,l) = NULL; \
+} while (0)
+
+#define ADDHEAD(q,l,n) \
+do { \
+    if (HEAD(q,l)) { \
+        PREV(HEAD(q,l),l) = (n); \
+        NEXT(n,l) = HEAD(q,l); \
+    } else { \
+        NEXT(n,l) = NULL; \
+        TAIL(q,l) = (n); \
+    } \
+    HEAD(q,l) = (n); \
+    PREV(n,l) = NULL; \
+} while (0)
+
+#define REMHEAD(q,l,n) \
+do { \
+    (n) = HEAD(q,l); \
+    if (n) { \
+        HEAD(q,l) = NEXT(n,l); \
+        if (HEAD(q,l)) \
+            PREV(HEAD(q,l),l) = NULL; \
+        else \
+            TAIL(q,l) = NULL; \
+    } \
+} while(0)
+
+#define REMTAIL(q,l,n) \
+do { \
+    (n) = TAIL(q,l); \
+    if (n) { \
+        TAIL(q,l) = PREV(n,l); \
+        if (TAIL(q,l)) \
+            NEXT(TAIL(q,l),l) = NULL; \
+        else \
+            HEAD(q,l) = NULL; \
+    } \
+} while(0)
+
+#define REMOVE(q,l,n) \
+do { \
+    if (PREV(n,l)) \
+        NEXT(PREV(n,l),l) = NEXT(n,l); \
+    else \
+        HEAD(q,l) = NEXT(n,l); \
+    if (NEXT(n,l)) \
+        PREV(NEXT(n,l),l) = PREV(n,l); \
+    else \
+        TAIL(q,l) = PREV(n,l); \
+    NEXT(n,l) = NULL; \
+    PREV(n,l) = NULL; \
+} while (0)
+
+#define INSERT(q,l,i,n) \
+do { \
+    if (PREV(i,l)) { \
+        NEXT(PREV(i,l),l) = (n); \
+    } else { \
+        HEAD(q,l) = (n); \
+    } \
+    PREV(n,l) = PREV(i,l); \
+    PREV(i,l) = (n); \
+    NEXT(n,l) = (i); \
+} while (0)
+
+#define APPENDLIST(q1,l,q2) \
+do { \
+    if (TAIL(q1,l)) { \
+        NEXT(TAIL(q1,l),l) = HEAD(q2,l); \
+        PREV(HEAD(q2,l),l) = TAIL(q1,l); \
+    } else { \
+        HEAD(q1,l) = HEAD(q2,l); \
+    } \
+    TAIL(q1,l) = TAIL(q2,l); \
+    LISTINIT(q2,l); \
+} while(0)
+
+#define INSERTLIST(q1,l,i,q2) \
+do { \
+    if (PREV(i,l)) { \
+        NEXT(PREV(i,l),l) = HEAD(q2,l); \
+    } else { \
+        HEAD(q1,l) = HEAD(q2,l); \
+    } \
+    PREV(HEAD(q2,l),l) = PREV(i,l); \
+    NEXT(TAIL(q2,l),l) = (i); \
+    PREV(i,l) = TAIL(q2,l); \
+    LISTINIT(q2,l); \
+} while(0)
+
+#define FOREACH(q,l,n)    for (n = HEAD(q,l); n; n = NEXT(n,l))
+#define FOREACHR(q,l,n)   for (n = TAIL(q,l); n; n = PREV(n,l))
+#define FOREACHD(q,l,n,r) for (n = TAIL(q,l); n && (r = PREV(n,l), 1); n = r)
+