First look at data structures. More to come tomorrow...

8 files changed, 262 insertions, 0 deletions

diff --git a/lib/Makefile b/lib/Makefile
new file mode 100644
index 0000000..214f76a
--- /dev/null
+++ b/lib/Makefile
@@ -0,0 +1,3 @@
+OBJS=lists.o
+
+include $(TOPDIR)/Rules
diff --git a/lib/birdlib.h b/lib/birdlib.h
new file mode 100644
index 0000000..fb4814f
--- /dev/null
+++ b/lib/birdlib.h
@@ -0,0 +1,17 @@
+/*
+ *	BIRD Library
+ *
+ *	(c) 1998 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#ifndef _BIRD_BIRDLIB_H_
+#define _BIRD_BIRDLIB_H_
+
+/* Ugly structure offset handling macros */
+
+#define OFFSETOF(s, i) ((unsigned int)&((s *)0)->i)
+#define SKIP_BACK(s, i, p) ((s *)((char *)p - OFFSETOF(s, i)))
+
+#endif
diff --git a/lib/lists.c b/lib/lists.c
new file mode 100644
index 0000000..321a5f0
--- /dev/null
+++ b/lib/lists.c
@@ -0,0 +1,76 @@
+/*
+ *	BIRD Library -- Linked Lists
+ *
+ *	(c) 1998 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#define _BIRD_LISTS_C_
+
+#include <nest/bird.h>
+#include <lib/lists.h>
+
+LIST_INLINE void
+add_tail(list *l, node *n)
+{
+  node *z = l->tail;
+
+  n->next = (node *) &l->tail;
+  n->prev = z;
+  z->next = n;
+  l->tail = n;
+}
+
+LIST_INLINE void
+add_head(list *l, node *n)
+{
+  node *z = l->head;
+
+  n->next = z;
+  n->prev = (node *) &l->head;
+  z->prev = n;
+  l->head = n;
+}
+
+LIST_INLINE void
+insert_node(node *n, node *after)
+{
+  node *z = after->next;
+
+  n->next = z;
+  n->prev = after;
+  after->next = n;
+  z->prev = n;
+}
+
+LIST_INLINE void
+rem_node(node *n)
+{
+  node *z = n->prev;
+  node *x = n->next;
+
+  z->next = x;
+  x->prev = z;
+}
+
+LIST_INLINE void
+init_list(list *l)
+{
+  l->head = (node *) &l->null;
+  l->null = NULL;
+  l->tail = (node *) &l->head;
+}
+
+LIST_INLINE void
+add_tail_list(list *to, list *l)
+{
+  node *p = to->tail;
+  node *q = l->head;
+
+  p->next = q;
+  q->prev = p;
+  q = l->tail;
+  q->next = (node *) &to->null;
+  to->tail = q;
+}
diff --git a/lib/lists.h b/lib/lists.h
new file mode 100644
index 0000000..acc054d
--- /dev/null
+++ b/lib/lists.h
@@ -0,0 +1,42 @@
+/*
+ *	BIRD Library -- Linked Lists
+ *
+ *	(c) 1998 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#ifndef _BIRD_LISTS_H_
+#define _BIRD_LISTS_H_
+
+typedef struct node {
+  struct node *next, *prev;
+} node;
+
+typedef struct list {			/* In fact two overlayed nodes */
+  struct node *head, *null, *tail;
+} list;
+
+#define NODE (node *)
+#define HEAD(list) ((void *)((list).head))
+#define TAIL(list) ((void *)((list).tail))
+#define WALK_LIST(n,list) for((n)=HEAD(list);(NODE (n))->next; \
+				n=(void *)((NODE (n))->next))
+#define EMPTY_LIST(list) (!(list).head->next)
+
+void add_tail(list *, node *);
+void add_head(list *, node *);
+void rem_node(node *);
+void add_tail_list(list *, list *);
+void init_list(list *);
+void insert_node(node *, node *);
+
+#ifndef _BIRD_LISTS_C_
+#define LIST_INLINE extern inline
+#include <lib/lists.c>
+#undef LIST_INLINE
+#else
+#define LIST_INLINE
+#endif
+
+#endif
diff --git a/lib/resource.h b/lib/resource.h
new file mode 100644
index 0000000..a1d229e
--- /dev/null
+++ b/lib/resource.h
@@ -0,0 +1,70 @@
+/*
+ *	BIRD Resource Manager
+ *
+ *	(c) 1998 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#ifndef _BIRD_RESOURCE_H_
+#define _BIRD_RESOURCE_H_
+
+#include <lib/lists.h>
+
+/* Resource */
+
+typedef struct resource {
+	node n;				/* Inside resource pool */
+	struct resclass *class;		/* Resource class */
+} resource;
+
+/* Resource class */
+
+struct resclass {
+	char *name;			/* Resource class name */
+	unsigned size;			/* Standard size of single resource */
+	void (*free)(resource *);	/* Freeing function */
+	void (*dump)(resource *);	/* Dump to debug output */
+};
+
+/* Generic resource manipulation */
+
+typedef struct pool pool;
+
+pool *rp_new(pool *);			/* Create new pool */
+void rp_init(pool *);			/* Initialize static pool */
+void rp_empty(pool *);			/* Free everything in the pool */
+void rfree(void *);			/* Free single resource */
+void rdump(void *);			/* Dump to debug output */
+
+void ralloc(pool *, struct resclass *);
+
+/* Normal memory blocks */
+
+void *mb_alloc(pool *, unsigned size);
+void *mb_free(void *);
+
+/* Memory pools with linear allocation */
+
+typedef struct mempool mempool;
+
+mempool *mp_new(pool *, unsigned blk);
+void mp_trim(pool *);				/* Free unused memory */
+void *mp_alloc(mempool *, unsigned size);	/* Aligned */
+void *mp_allocu(mempool *, unsigned size);	/* Unaligned */
+void *mp_allocz(mempool *, unsigned size);	/* With clear */
+
+/* Slabs */
+
+typedef struct slab slab;
+
+slab *sl_new(pool *, unsigned size);
+void *sl_alloc(slab *);
+void sl_free(slab *, void *);
+
+/* Low-level memory allocation functions, please don't use */
+
+void *xmalloc(unsigned);
+#define xfree(x) free(x)
+
+#endif
diff --git a/lib/socket.h b/lib/socket.h
new file mode 100644
index 0000000..4f68a16
--- /dev/null
+++ b/lib/socket.h
@@ -0,0 +1,16 @@
+/*
+ *	BIRD Socket Interface
+ *
+ *	(c) 1998 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#ifndef _BIRD_SOCKET_H_
+#define _BIRD_SOCKET_H_
+
+#include <lib/resource.h>
+
+typedef struct birdsock socket;
+
+#endif
diff --git a/lib/timer.h b/lib/timer.h
new file mode 100644
index 0000000..29f20c4
--- /dev/null
+++ b/lib/timer.h
@@ -0,0 +1,26 @@
+/*
+ *	BIRD Timers
+ *
+ *	(c) 1998 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#ifndef _BIRD_TIMER_H_
+#define _BIRD_TIMER_H_
+
+#include <lib/resource.h>
+
+typedef struct timer {
+	resource r;
+	void (*hook)(struct timer *);
+	void *data;
+	/* internal fields should be here */
+} timer;
+
+timer *tm_new(pool *, void (*hook)(timer *), void *data);
+void tm_start(timer *, unsigned after);
+void tm_stop(timer *);
+void tm_trigger(timer *);
+
+#endif
diff --git a/lib/unaligned.h b/lib/unaligned.h
new file mode 100644
index 0000000..29fcee9
--- /dev/null
+++ b/lib/unaligned.h
@@ -0,0 +1,12 @@
+/*
+ *	Unaligned Data Accesses
+ *
+ *	(c) 1998 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#ifndef _BIRD_UNALIGNED_H_
+#define _BIRD_UNALIGNED_H_
+
+#endif