Fix:Core:Renamed src to navit for cleanup of includes

git-svn-id: http://svn.code.sf.net/p/navit/code/trunk/navit@1059 ffa7fe5e-494d-0410-b361-a75ebd5db220

1 files changed, 699 insertions, 0 deletions

diff --git a/navit/fib-1.1/fib.c b/navit/fib-1.1/fib.c
new file mode 100644
index 000000000..276b6bd37
--- /dev/null
+++ b/navit/fib-1.1/fib.c
@@ -0,0 +1,699 @@
+/*-
+ * Copyright 1997-2003 John-Mark Gurney.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS 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 AUTHOR OR 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.
+ *
+ *	$Id: fib.c,v 1.2 2007-07-04 22:44:39 martin-s Exp $
+ *
+ */
+
+#include <fib.h>
+#include <fibpriv.h>
+
+#include <limits.h>
+#include <stdlib.h>
+
+#define swap(type, a, b)		\
+		do {			\
+			type c;		\
+			c = a;		\
+			a = b;		\
+			b = c;		\
+		} while (0)		\
+
+#define INT_BITS        (sizeof(int) * 8)
+static inline int
+ceillog2(unsigned int a)
+{
+	int oa;
+	int i;
+	int b;
+
+	oa = a;
+	b = INT_BITS / 2;
+	i = 0;
+	while (b) {
+		i = (i << 1);
+		if (a >= (1 << b)) {
+			a /= (1 << b);
+			i = i | 1;
+		} else
+			a &= (1 << b) - 1;
+		b /= 2;
+	}
+	if ((1 << i) == oa)
+		return i;
+	else
+		return i + 1;
+}
+
+/*
+ * Private Heap Functions
+ */
+static void
+fh_deleteel(struct fibheap *h, struct fibheap_el *x)
+{
+	void *data;
+	int key;
+
+	data = x->fhe_data;
+	key = x->fhe_key;
+
+	if (!h->fh_keys)
+		fh_replacedata(h, x, h->fh_neginf);
+	else
+		fh_replacekey(h, x, INT_MIN);
+	if (fh_extractminel(h) != x) {
+		/*
+		 * XXX - This should never happen as fh_replace should set it
+		 * to min.
+		 */
+		abort();
+	}
+
+	x->fhe_data = data;
+	x->fhe_key = key;
+}
+
+static void
+fh_initheap(struct fibheap *new)
+{
+	new->fh_cmp_fnct = NULL;
+	new->fh_neginf = NULL;
+	new->fh_n = 0;
+	new->fh_Dl = -1;
+	new->fh_cons = NULL;
+	new->fh_min = NULL;
+	new->fh_root = NULL;
+	new->fh_keys = 0;
+#ifdef FH_STATS
+	new->fh_maxn = 0;
+	new->fh_ninserts = 0;
+	new->fh_nextracts = 0;
+#endif
+}
+
+static void
+fh_destroyheap(struct fibheap *h)
+{
+	h->fh_cmp_fnct = NULL;
+	h->fh_neginf = NULL;
+	if (h->fh_cons != NULL)
+		free(h->fh_cons);
+	h->fh_cons = NULL;
+	free(h);
+}
+
+/*
+ * Public Heap Functions
+ */
+struct fibheap *
+fh_makekeyheap()
+{
+	struct fibheap *n;
+
+	if ((n = malloc(sizeof *n)) == NULL)
+		return NULL;
+
+	fh_initheap(n);
+	n->fh_keys = 1;
+
+	return n;
+}
+
+struct fibheap *
+fh_makeheap()
+{
+	struct fibheap *n;
+
+	if ((n = malloc(sizeof *n)) == NULL)
+		return NULL;
+
+	fh_initheap(n);
+
+	return n;
+}
+
+voidcmp
+fh_setcmp(struct fibheap *h, voidcmp fnct)
+{
+	voidcmp oldfnct;
+	
+	oldfnct = h->fh_cmp_fnct;
+	h->fh_cmp_fnct = fnct;
+
+	return oldfnct;
+}
+
+void *
+fh_setneginf(struct fibheap *h, void *data)
+{
+	void *old;
+
+	old = h->fh_neginf;
+	h->fh_neginf = data;
+
+	return old;
+}
+
+struct fibheap *
+fh_union(struct fibheap *ha, struct fibheap *hb)
+{
+	struct fibheap_el *x;
+
+	if (ha->fh_root == NULL || hb->fh_root == NULL) {
+		/* either one or both are empty */
+		if (ha->fh_root == NULL) {
+			fh_destroyheap(ha);
+			return hb;
+		} else {
+			fh_destroyheap(hb);
+			return ha;
+		}
+	}
+	ha->fh_root->fhe_left->fhe_right = hb->fh_root;
+	hb->fh_root->fhe_left->fhe_right = ha->fh_root;
+	x = ha->fh_root->fhe_left;
+	ha->fh_root->fhe_left = hb->fh_root->fhe_left;
+	hb->fh_root->fhe_left = x;
+	ha->fh_n += hb->fh_n;
+	/*
+	 * we probably should also keep stats on number of unions
+	 */
+
+	/* set fh_min if necessary */
+	if (fh_compare(ha, hb->fh_min, ha->fh_min) < 0)
+		ha->fh_min = hb->fh_min;
+
+	fh_destroyheap(hb);
+	return ha;
+}
+
+void
+fh_deleteheap(struct fibheap *h)
+{
+	/*
+	 * We could do this even faster by walking each binomial tree, but
+	 * this is simpler to code.
+	 */
+	while (h->fh_min != NULL)
+		fhe_destroy(fh_extractminel(h));
+
+	fh_destroyheap(h);
+}
+
+/*
+ * Public Key Heap Functions
+ */
+struct fibheap_el *
+fh_insertkey(struct fibheap *h, int key, void *data)
+{
+	struct fibheap_el *x;
+
+	if ((x = fhe_newelem()) == NULL)
+		return NULL;
+
+	/* just insert on root list, and make sure it's not the new min */
+	x->fhe_data = data;
+	x->fhe_key = key;
+
+	fh_insertel(h, x);
+
+	return x;
+}
+
+int
+fh_minkey(struct fibheap *h)
+{
+	if (h->fh_min == NULL)
+		return INT_MIN;
+	return h->fh_min->fhe_key;
+}
+
+int
+fh_replacekey(struct fibheap *h, struct fibheap_el *x, int key)
+{
+	int ret;
+
+	ret = x->fhe_key;
+	(void)fh_replacekeydata(h, x, key, x->fhe_data);
+
+	return ret;
+}
+
+#include <stdio.h>
+
+void *
+fh_replacekeydata(struct fibheap *h, struct fibheap_el *x, int key, void *data)
+{
+	void *odata;
+	int okey;
+	struct fibheap_el *y;
+	int r;
+
+	odata = x->fhe_data;
+	okey = x->fhe_key;
+
+	/*
+	 * we can increase a key by deleting and reinserting, that
+	 * requires O(lgn) time.
+	 */
+	if ((r = fh_comparedata(h, key, data, x)) > 0) {
+		printf("fh_comparedata r=%d key=%d data=%p\n", r, key, data);
+		/* XXX - bad code! */
+		abort();
+		fh_deleteel(h, x);
+
+		x->fhe_data = data;
+		x->fhe_key = key;
+
+		fh_insertel(h, x);
+
+		return odata;
+	}
+
+	x->fhe_data = data;
+	x->fhe_key = key;
+
+	/* because they are equal, we don't have to do anything */
+	if (r == 0)
+		return odata;
+
+	y = x->fhe_p;
+
+	if (h->fh_keys && okey == key)
+		return odata;
+
+	if (y != NULL && fh_compare(h, x, y) <= 0) {
+		fh_cut(h, x, y);
+		fh_cascading_cut(h, y);
+	}
+
+	/*
+	 * the = is so that the call from fh_delete will delete the proper
+	 * element.
+	 */
+	if (fh_compare(h, x, h->fh_min) <= 0)
+		h->fh_min = x;
+
+	return odata;
+}
+
+/*
+ * Public void * Heap Functions
+ */
+/*
+ * this will return these values:
+ *	NULL	failed for some reason
+ *	ptr	token to use for manipulation of data
+ */
+struct fibheap_el *
+fh_insert(struct fibheap *h, void *data)
+{
+	struct fibheap_el *x;
+
+	if ((x = fhe_newelem()) == NULL)
+		return NULL;
+
+	/* just insert on root list, and make sure it's not the new min */
+	x->fhe_data = data;
+
+	fh_insertel(h, x);
+
+	return x;
+}
+
+void *
+fh_min(struct fibheap *h)
+{
+	if (h->fh_min == NULL)
+		return NULL;
+	return h->fh_min->fhe_data;
+}
+
+void *
+fh_extractmin(struct fibheap *h)
+{
+	struct fibheap_el *z;
+	void *ret;
+
+	ret = NULL;
+
+	if (h->fh_min != NULL) {
+		z = fh_extractminel(h);
+		ret = z->fhe_data;
+#ifndef NO_FREE
+		fhe_destroy(z);
+#endif
+
+	}
+
+	return ret;
+}
+
+void *
+fh_replacedata(struct fibheap *h, struct fibheap_el *x, void *data)
+{
+	return fh_replacekeydata(h, x, x->fhe_key, data);
+}
+
+void *
+fh_delete(struct fibheap *h, struct fibheap_el *x)
+{
+	void *k;
+
+	k = x->fhe_data;
+	if (!h->fh_keys)
+		fh_replacedata(h, x, h->fh_neginf);
+	else
+		fh_replacekey(h, x, INT_MIN);
+	fh_extractmin(h);
+
+	return k;
+}
+
+/*
+ * Statistics Functions
+ */
+#ifdef FH_STATS
+int
+fh_maxn(struct fibheap *h)
+{
+	return h->fh_maxn;
+}
+
+int
+fh_ninserts(struct fibheap *h)
+{
+	return h->fh_ninserts;
+}
+
+int
+fh_nextracts(struct fibheap *h)
+{
+	return h->fh_nextracts;
+}
+#endif
+
+/*
+ * begin of private element fuctions
+ */
+static struct fibheap_el *
+fh_extractminel(struct fibheap *h)
+{
+	struct fibheap_el *ret;
+	struct fibheap_el *x, *y, *orig;
+
+	ret = h->fh_min;
+
+	orig = NULL;
+	/* put all the children on the root list */
+	/* for true consistancy, we should use fhe_remove */
+	for(x = ret->fhe_child; x != orig && x != NULL;) {
+		if (orig == NULL)
+			orig = x;
+		y = x->fhe_right;
+		x->fhe_p = NULL;
+		fh_insertrootlist(h, x);
+		x = y;
+	}
+	/* remove minimum from root list */
+	fh_removerootlist(h, ret);
+	h->fh_n--;
+
+	/* if we aren't empty, consolidate the heap */
+	if (h->fh_n == 0)
+		h->fh_min = NULL;
+	else {
+		h->fh_min = ret->fhe_right;
+		fh_consolidate(h);
+	}
+
+#ifdef FH_STATS
+	h->fh_nextracts++;
+#endif
+
+	return ret;
+}
+
+static void
+fh_insertrootlist(struct fibheap *h, struct fibheap_el *x)
+{
+	if (h->fh_root == NULL) {
+		h->fh_root = x;
+		x->fhe_left = x;
+		x->fhe_right = x;
+		return;
+	}
+
+	fhe_insertafter(h->fh_root, x);
+}
+
+static void
+fh_removerootlist(struct fibheap *h, struct fibheap_el *x)
+{
+	if (x->fhe_left == x)
+		h->fh_root = NULL;
+	else
+		h->fh_root = fhe_remove(x);
+}
+
+static void
+fh_consolidate(struct fibheap *h)
+{
+	struct fibheap_el **a;
+	struct fibheap_el *w;
+	struct fibheap_el *y;
+	struct fibheap_el *x;
+	int i;
+	int d;
+	int D;
+
+	fh_checkcons(h);
+
+	/* assign a the value of h->fh_cons so I don't have to rewrite code */
+	D = h->fh_Dl + 1;
+	a = h->fh_cons;
+
+	for (i = 0; i < D; i++)
+		a[i] = NULL;
+
+	while ((w = h->fh_root) != NULL) {
+		x = w;
+		fh_removerootlist(h, w);
+		d = x->fhe_degree;
+		/* XXX - assert that d < D */
+		while(a[d] != NULL) {
+			y = a[d];
+			if (fh_compare(h, x, y) > 0)
+				swap(struct fibheap_el *, x, y);
+			fh_heaplink(h, y, x);
+			a[d] = NULL;
+			d++;
+		}
+		a[d] = x;
+	}
+	h->fh_min = NULL;
+	for (i = 0; i < D; i++)
+		if (a[i] != NULL) {
+			fh_insertrootlist(h, a[i]);
+			if (h->fh_min == NULL || fh_compare(h, a[i],
+			    h->fh_min) < 0)
+				h->fh_min = a[i];
+		}
+}
+
+static void
+fh_heaplink(struct fibheap *h, struct fibheap_el *y, struct fibheap_el *x)
+{
+	/* make y a child of x */
+	if (x->fhe_child == NULL)
+		x->fhe_child = y;
+	else
+		fhe_insertbefore(x->fhe_child, y);
+	y->fhe_p = x;
+	x->fhe_degree++;
+	y->fhe_mark = 0;
+}
+
+static void
+fh_cut(struct fibheap *h, struct fibheap_el *x, struct fibheap_el *y)
+{
+	fhe_remove(x);
+	y->fhe_degree--;
+	fh_insertrootlist(h, x);
+	x->fhe_p = NULL;
+	x->fhe_mark = 0;
+}
+
+static void
+fh_cascading_cut(struct fibheap *h, struct fibheap_el *y)
+{
+	struct fibheap_el *z;
+
+	while ((z = y->fhe_p) != NULL) {
+		if (y->fhe_mark == 0) {
+			y->fhe_mark = 1;
+			return;
+		} else {
+			fh_cut(h, y, z);
+			y = z;
+		}
+	}
+}
+
+/*
+ * begining of handling elements of fibheap
+ */
+static struct fibheap_el *
+fhe_newelem()
+{
+	struct fibheap_el *e;
+
+	if ((e = malloc(sizeof *e)) == NULL)
+		return NULL;
+
+	fhe_initelem(e);
+
+	return e;
+}
+
+static void
+fhe_initelem(struct fibheap_el *e)
+{
+	e->fhe_degree = 0;
+	e->fhe_mark = 0;
+	e->fhe_p = NULL;
+	e->fhe_child = NULL;
+	e->fhe_left = e;
+	e->fhe_right = e;
+	e->fhe_data = NULL;
+}
+
+static void
+fhe_insertafter(struct fibheap_el *a, struct fibheap_el *b)
+{
+	if (a == a->fhe_right) {
+		a->fhe_right = b;
+		a->fhe_left = b;
+		b->fhe_right = a;
+		b->fhe_left = a;
+	} else {
+		b->fhe_right = a->fhe_right;
+		a->fhe_right->fhe_left = b;
+		a->fhe_right = b;
+		b->fhe_left = a;
+	}
+}
+
+static inline void
+fhe_insertbefore(struct fibheap_el *a, struct fibheap_el *b)
+{
+	fhe_insertafter(a->fhe_left, b);
+}
+
+static struct fibheap_el *
+fhe_remove(struct fibheap_el *x)
+{
+	struct fibheap_el *ret;
+
+	if (x == x->fhe_left)
+		ret = NULL;
+	else
+		ret = x->fhe_left;
+
+	/* fix the parent pointer */
+	if (x->fhe_p != NULL && x->fhe_p->fhe_child == x)
+		x->fhe_p->fhe_child = ret;
+
+	x->fhe_right->fhe_left = x->fhe_left;
+	x->fhe_left->fhe_right = x->fhe_right;
+
+	/* clear out hanging pointers */
+	x->fhe_p = NULL;
+	x->fhe_left = x;
+	x->fhe_right = x;
+
+	return ret;
+}
+
+static void
+fh_checkcons(struct fibheap *h)
+{
+	int oDl;
+
+	/* make sure we have enough memory allocated to "reorganize" */
+	if (h->fh_Dl == -1 || h->fh_n > (1 << h->fh_Dl)) {
+		oDl = h->fh_Dl;
+		if ((h->fh_Dl = ceillog2(h->fh_n) + 1) < 8)
+			h->fh_Dl = 8;
+		if (oDl != h->fh_Dl)
+			h->fh_cons = (struct fibheap_el **)realloc(h->fh_cons,
+			    sizeof *h->fh_cons * (h->fh_Dl + 1));
+		if (h->fh_cons == NULL)
+			abort();
+	}
+}
+
+static int
+fh_compare(struct fibheap *h, struct fibheap_el *a, struct fibheap_el *b)
+{
+	if (h->fh_keys) {
+		if (a->fhe_key < b->fhe_key)
+			return -1;
+		if (a->fhe_key == b->fhe_key)
+			return 0;
+		return 1;
+	} else
+		return h->fh_cmp_fnct(a->fhe_data, b->fhe_data);
+}
+
+static int
+fh_comparedata(struct fibheap *h, int key, void *data, struct fibheap_el *b)
+{
+	struct fibheap_el a;
+
+	a.fhe_key = key;
+	a.fhe_data = data;
+
+	return fh_compare(h, &a, b);
+}
+
+static void
+fh_insertel(struct fibheap *h, struct fibheap_el *x)
+{
+	fh_insertrootlist(h, x);
+
+	if (h->fh_min == NULL || (h->fh_keys ? x->fhe_key < h->fh_min->fhe_key
+	    : h->fh_cmp_fnct(x->fhe_data, h->fh_min->fhe_data) < 0))
+		h->fh_min = x;
+
+	h->fh_n++;
+
+#ifdef FH_STATS
+	if (h->fh_n > h->fh_maxn)
+		h->fh_maxn = h->fh_n;
+	h->fh_ninserts++;
+#endif
+
+}