-/* $Id$ */
-
/* a generic graph library. */
-/* Copyright (c) 2006 Darina Dimitrova, Arnaud Legrand. */
-/* All rights reserved. */
+/* Copyright (c) 2006, 2007, 2008, 2009, 2010. The SimGrid Team.
+ * All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
+#include "simgrid_config.h" /* getline */
+#include <errno.h>
#include <stdlib.h>
#include "xbt/sysdep.h"
#include "xbt/log.h"
#include "xbt/graphxml_parse.h"
#include "xbt/dict.h"
#include "xbt/heap.h"
+#include "xbt/str.h"
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(graph, xbt, "Graph");
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_graph, xbt, "Graph");
-/** Constructor
- * \return a new graph
+/** @brief Constructor
+ * @return a new graph
*/
xbt_graph_t xbt_graph_new_graph(unsigned short int directed, void *data)
{
return graph;
}
+/** @brief add a node to the given graph */
xbt_node_t xbt_graph_new_node(xbt_graph_t g, void *data)
{
xbt_node_t node = NULL;
node = xbt_new0(struct xbt_node, 1);
node->data = data;
- node->in = xbt_dynar_new(sizeof(xbt_edge_t), NULL);
+ if (g->directed)
+ /* only the "out" field is used */
+ node->in = xbt_dynar_new(sizeof(xbt_edge_t), NULL);
+
node->out = xbt_dynar_new(sizeof(xbt_edge_t), NULL);
node->position_x = -1.0;
node->position_y = -1.0;
return node;
}
-
+/** @brief add an edge to the given graph */
xbt_edge_t xbt_graph_new_edge(xbt_graph_t g,
- xbt_node_t src, xbt_node_t dst, void *data)
+ xbt_node_t src, xbt_node_t dst, void *data)
{
xbt_edge_t edge = NULL;
-
edge = xbt_new0(struct xbt_edge, 1);
xbt_dynar_push(src->out, &edge);
- if (g->directed)
+ if (g->directed)
xbt_dynar_push(dst->in, &edge);
- else /* only the "out" field is used */
+ else /* only the "out" field is used */
xbt_dynar_push(dst->out, &edge);
edge->data = data;
edge->src = src;
edge->dst = dst;
- if (!g->directed)
- {
- xbt_dynar_push(src->in, &edge);
- xbt_dynar_push(dst->out, &edge);
- }
-
xbt_dynar_push(g->edges, &edge);
return edge;
}
+/** @brief Get the edge connecting src and dst */
+xbt_edge_t xbt_graph_get_edge(xbt_graph_t g, xbt_node_t src,
+ xbt_node_t dst)
+{
+ xbt_edge_t edge;
+ unsigned int cursor;
-/** Destructor
- * \param l poor victim
- *
- * Free the graph structure.
- */
-void xbt_graph_free_graph(xbt_graph_t g,
- void node_free_function(void *ptr),
- void edge_free_function(void *ptr),
- void graph_free_function(void *ptr))
+ xbt_dynar_foreach(src->out, cursor, edge) {
+ XBT_DEBUG("%p = %p--%p", edge, edge->src, edge->dst);
+ if ((edge->src == src) && (edge->dst == dst))
+ return edge;
+ }
+ if (!g->directed) {
+ xbt_dynar_foreach(src->out, cursor, edge) {
+ XBT_DEBUG("%p = %p--%p", edge, edge->src, edge->dst);
+ if ((edge->dst == src) && (edge->src == dst))
+ return edge;
+ }
+ }
+ return NULL;
+}
+
+/** @brief Get the user data associated to a node */
+void *xbt_graph_node_get_data(xbt_node_t node)
{
- int cursor = 0;
- xbt_node_t node = NULL;
- xbt_edge_t edge = NULL;
+ return node->data;
+}
+/** @brief Set the user data associated to a node */
+void xbt_graph_node_set_data(xbt_node_t node, void *data)
+{
+ node->data = data;
+}
- xbt_dynar_foreach(g->nodes, cursor, node)
- {
- xbt_dynar_free(&(node->out));
- xbt_dynar_free(&(node->in));
- if(node_free_function)
- node_free_function(node->data);
- }
+/** @brief Get the user data associated to a edge */
+void *xbt_graph_edge_get_data(xbt_edge_t edge)
+{
+ return edge->data;
+}
- xbt_dynar_foreach(g->edges, cursor, edge)
- {
- if(edge_free_function)
- edge_free_function(edge->data);
- }
+/** @brief Set the user data associated to a edge */
+void xbt_graph_edge_set_data(xbt_edge_t edge, void *data)
+{
+ edge->data = data;
+}
- xbt_dynar_foreach(g->nodes, cursor, node)
- free(node);
- xbt_dynar_free(&(g->nodes));
+/** @brief Destructor
+ * @param g: poor victim
+ * @param node_free_function: function to use to free data associated to each node
+ * @param edge_free_function: function to use to free data associated to each edge
+ * @param graph_free_function: function to use to free data associated to g
+ *
+ * Free the graph structure.
+ */
+void xbt_graph_free_graph(xbt_graph_t g,
+ void_f_pvoid_t node_free_function,
+ void_f_pvoid_t edge_free_function,
+ void_f_pvoid_t graph_free_function)
+{
+ unsigned int cursor;
+ xbt_node_t node;
+ xbt_edge_t edge;
- xbt_dynar_foreach(g->edges, cursor, edge)
+ xbt_dynar_foreach(g->edges, cursor, edge) {
+ if (edge_free_function)
+ edge_free_function(edge->data);
free(edge);
+ }
xbt_dynar_free(&(g->edges));
- free(g);
+ xbt_dynar_foreach(g->nodes, cursor, node) {
+ xbt_dynar_free(&(node->out));
+ xbt_dynar_free(&(node->in));
+ if (node_free_function)
+ node_free_function(node->data);
+ free(node);
+ }
+ xbt_dynar_free(&(g->nodes));
- return;
+ if (graph_free_function)
+ graph_free_function(g->data);
+ free(g);
+ xbt_graph_parse_lex_destroy();
}
-
+/** @brief remove the given node from the given graph */
void xbt_graph_free_node(xbt_graph_t g, xbt_node_t n,
- void_f_pvoid_t * node_free_function,
- void_f_pvoid_t * edge_free_function)
+ void_f_pvoid_t node_free_function,
+ void_f_pvoid_t edge_free_function)
{
unsigned long nbr;
- int i;
- int cursor = 0;
+ unsigned long i;
+ unsigned int cursor = 0;
xbt_node_t node = NULL;
xbt_edge_t edge = NULL;
nbr = xbt_dynar_length(g->edges);
- cursor=0;
- for (i = 0; i < nbr; i++)
- {
- xbt_dynar_cursor_get(g->edges, &cursor, &edge);
-
- if ((edge->dst == n) || (edge->src == n))
- {
- xbt_graph_free_edge(g, edge, edge_free_function);
- }
- else xbt_dynar_cursor_step( g->edges, &cursor);
- }
+ cursor = 0;
+ for (i = 0; i < nbr; i++) {
+ xbt_dynar_get_cpy(g->edges, cursor, &edge);
+ if ((edge->dst == n) || (edge->src == n)) {
+ xbt_graph_free_edge(g, edge, edge_free_function);
+ } else
+ cursor++;
+ }
- if ((node_free_function) && (n->data))
+ if ((node_free_function) && (n->data))
node_free_function(n->data);
cursor = 0;
xbt_dynar_foreach(g->nodes, cursor, node)
- {
if (node == n)
- xbt_dynar_cursor_rm(g->nodes, &cursor);
+ xbt_dynar_cursor_rm(g->nodes, &cursor);
- }
+ xbt_dynar_free(&(n->in));
+ xbt_dynar_free(&(n->out));
+
+ free(n);
return;
}
+/** @brief remove the given edge from the given graph */
void xbt_graph_free_edge(xbt_graph_t g, xbt_edge_t e,
- void free_function(void *ptr))
+ void_f_pvoid_t free_function)
{
int idx;
- int cursor = 0;
- xbt_edge_t edge = NULL;
+ unsigned int cursor = 0;
+ xbt_edge_t edge = NULL;
if ((free_function) && (e->data))
free_function(e->data);
- xbt_dynar_foreach(g->edges, cursor, edge)
- {
- if (edge == e)
- {
- if (g->directed) {
- idx = __xbt_find_in_dynar(edge->dst->in,edge);
- xbt_dynar_remove_at(edge->dst->in, idx,NULL);
- } else { /* only the out field is used */
- idx = __xbt_find_in_dynar(edge->dst->out,edge);
- xbt_dynar_remove_at(edge->dst->out, idx,NULL);
- }
-
- idx = __xbt_find_in_dynar(edge->src->out,edge);
- xbt_dynar_remove_at(edge->src->out,idx,NULL);
-
- xbt_dynar_cursor_rm(g->edges, &cursor);
- free(edge);
- break;
+ xbt_dynar_foreach(g->edges, cursor, edge) {
+ if (edge == e) {
+ if (g->directed) {
+ idx = __xbt_find_in_dynar(edge->dst->in, edge);
+ xbt_dynar_remove_at(edge->dst->in, idx, NULL);
+ } else { /* only the out field is used */
+ idx = __xbt_find_in_dynar(edge->dst->out, edge);
+ xbt_dynar_remove_at(edge->dst->out, idx, NULL);
}
+
+ idx = __xbt_find_in_dynar(edge->src->out, edge);
+ xbt_dynar_remove_at(edge->src->out, idx, NULL);
+
+ xbt_dynar_cursor_rm(g->edges, &cursor);
+ free(edge);
+ break;
}
+ }
}
int __xbt_find_in_dynar(xbt_dynar_t dynar, void *p)
{
- int cursor = 0;
- void *tmp=NULL;
+ unsigned int cursor = 0;
+ void *tmp = NULL;
- xbt_dynar_foreach(dynar, cursor, tmp)
- {
- if (tmp == p)
- return cursor;
- }
+ xbt_dynar_foreach(dynar, cursor, tmp) {
+ if (tmp == p)
+ return cursor;
+ }
return -1;
}
+/** @brief Retrieve the graph's nodes as a dynar */
xbt_dynar_t xbt_graph_get_nodes(xbt_graph_t g)
{
return g->nodes;
}
+/** @brief Retrieve the graph's edges as a dynar */
xbt_dynar_t xbt_graph_get_edges(xbt_graph_t g)
{
return g->edges;
}
+/** @brief Retrieve the node at the source of the given edge */
xbt_node_t xbt_graph_edge_get_source(xbt_edge_t e)
{
-
return e->src;
}
+/** @brief Retrieve the node being the target of the given edge */
xbt_node_t xbt_graph_edge_get_target(xbt_edge_t e)
{
return e->dst;
}
+/** @brief Retrieve the outgoing edges of the given node */
+xbt_dynar_t xbt_graph_node_get_outedges(xbt_node_t n)
+{
+ return n->out;
+}
+/** @brief Set the weight of the given edge */
void xbt_graph_edge_set_length(xbt_edge_t e, double length)
{
e->length = length;
}
-double xbt_graph_edge_get_length(xbt_edge_t e)
+/** @brief Get the length of a edge */
+double xbt_graph_edge_get_length(xbt_edge_t edge)
{
- return e->length;
+ return edge->length;
}
-/*construct the adjacency matrix corresponding to a graph,
- the weights are the distances between nodes
+/** @brief construct the adjacency matrix corresponding to the given graph
+ *
+ * The weights are the distances between nodes
*/
double *xbt_graph_get_length_matrix(xbt_graph_t g)
{
- int cursor = 0;
- int in_cursor = 0;
- int idx,i;
+ unsigned int cursor = 0;
+ unsigned int in_cursor = 0;
+ unsigned long idx, i;
unsigned long n;
xbt_edge_t edge = NULL;
- xbt_node_t node=NULL;
+ xbt_node_t node = NULL;
double *d = NULL;
# define D(u,v) d[(u)*n+(v)]
n = xbt_dynar_length(g->nodes);
- d = (double *) xbt_new0(double, n*n);
+ d = (double *) xbt_new0(double, n * n);
- for (i = 0; i < n * n; i++)
- {
- d[i] = -1.0;
- }
-
- xbt_dynar_foreach(g->nodes, cursor, node)
- {
- in_cursor = 0;
- D(cursor, cursor) = 0;
-
- xbt_dynar_foreach(node->out, in_cursor, edge)
- {
- if (edge->dst==node)
- idx= __xbt_find_in_dynar(g->nodes, edge->src);
- else /*case of undirected graphs*/
- idx = __xbt_find_in_dynar(g->nodes, edge->dst);
- D( cursor,idx) = edge->length;
- }
+ for (i = 0; i < n * n; i++) {
+ d[i] = -1.0;
+ }
+
+ xbt_dynar_foreach(g->nodes, cursor, node) {
+ in_cursor = 0;
+ D(cursor, cursor) = 0;
+
+ xbt_dynar_foreach(node->out, in_cursor, edge) {
+ if (edge->dst == node)
+ idx = __xbt_find_in_dynar(g->nodes, edge->src);
+ else /*case of undirected graphs */
+ idx = __xbt_find_in_dynar(g->nodes, edge->dst);
+ D(cursor, idx) = edge->length;
}
+ }
# undef D
return d;
}
-
+/** @brief Floyd-Warshall algorithm for shortest path finding
+ *
+ * From wikipedia:
+ *
+ * The Floyd–Warshall algorithm takes as input an adjacency matrix
+ * representation of a weighted, directed graph (V, E). The weight of a
+ * path between two vertices is the sum of the weights of the edges along
+ * that path. The edges E of the graph may have negative weights, but the
+ * graph must not have any negative weight cycles. The algorithm computes,
+ * for each pair of vertices, the minimum weight among all paths between
+ * the two vertices. The running time complexity is Θ(|V|3).
+ */
void xbt_floyd_algorithm(xbt_graph_t g, double *adj, double *d,
- xbt_node_t * p)
+ xbt_node_t * p)
{
- int i, j, k;
+ unsigned long i, j, k;
unsigned long n;
n = xbt_dynar_length(g->nodes);
# define D(u,v) d[(u)*n+(v)]
# define P(u,v) p[(u)*n+(v)]
- for (i = 0; i < n * n; i++)
- {
- d[i] = adj[i];
- }
+ for (i = 0; i < n * n; i++) {
+ d[i] = adj[i];
+ }
- for (i = 0; i < n; i++)
- {
- for (j = 0; j < n; j++)
- {
- if (D(i, j) != -1)
- {
- P(i,j) =*((xbt_node_t*) xbt_dynar_get_ptr(g->nodes, i));
- }
- }
+ for (i = 0; i < n; i++) {
+ for (j = 0; j < n; j++) {
+ if (D(i, j) != -1) {
+ P(i, j) = *((xbt_node_t *) xbt_dynar_get_ptr(g->nodes, i));
+ }
}
-
- for (k = 0; k < n; k++)
- {
- for (i = 0; i < n; i++)
- {
- for (j = 0; j < n; j++)
- {
- if ((D(i, k) != -1) && (D(k, j) != -1))
- {
- if ((D(i, j) == -1) || (D(i, j) > D(i, k) + D(k, j)))
- {
- D(i, j) = D(i, k) + D(k, j);
- P(i, j) = P(k, j);
- }
- }
- }
- }
+ }
+
+ for (k = 0; k < n; k++) {
+ for (i = 0; i < n; i++) {
+ for (j = 0; j < n; j++) {
+ if ((D(i, k) != -1) && (D(k, j) != -1)) {
+ if ((D(i, j) == -1) || (D(i, j) > D(i, k) + D(k, j))) {
+ D(i, j) = D(i, k) + D(k, j);
+ P(i, j) = P(k, j);
+ }
+ }
+ }
}
+ }
# undef D
}
-/*computes all-pairs shortest paths*/
+/** @brief computes all-pairs shortest paths */
xbt_node_t *xbt_graph_shortest_paths(xbt_graph_t g)
{
xbt_node_t *p;
xbt_node_t *r;
- int i, j, k;
+ unsigned long i, j, k;
unsigned long n;
double *adj = NULL;
n = xbt_dynar_length(g->nodes);
adj = xbt_graph_get_length_matrix(g);
- d = xbt_new0(double,n*n);
- p = xbt_new0(xbt_node_t,n*n);
- r = xbt_new0(xbt_node_t,n*n);
-
+ d = xbt_new0(double, n * n);
+ p = xbt_new0(xbt_node_t, n * n);
+ r = xbt_new0(xbt_node_t, n * n);
+
xbt_floyd_algorithm(g, adj, d, p);
-
- for (i = 0; i < n; i++)
- {
- for (j = 0; j < n; j++)
- {
- k = j;
-
- while ((P(i, k)) && (__xbt_find_in_dynar(g->nodes, P(i, k)) != i))
- {
- k = __xbt_find_in_dynar(g->nodes, P(i, k));
- }
-
- if (P(i, j))
- {
- R(i, j) = *((xbt_node_t*) xbt_dynar_get_ptr(g->nodes, k));
- }
- }
+
+ for (i = 0; i < n; i++) {
+ for (j = 0; j < n; j++) {
+ k = j;
+
+ while ((P(i, k)) && (__xbt_find_in_dynar(g->nodes, P(i, k)) != i)) {
+ k = __xbt_find_in_dynar(g->nodes, P(i, k));
+ }
+
+ if (P(i, j)) {
+ R(i, j) = *((xbt_node_t *) xbt_dynar_get_ptr(g->nodes, k));
+ }
}
+ }
# undef R
# undef P
return r;
}
-
-xbt_edge_t* xbt_graph_spanning_tree_prim(xbt_graph_t g)
+/** @brief Extract a spanning tree of the given graph */
+xbt_edge_t *xbt_graph_spanning_tree_prim(xbt_graph_t g)
{
- int tree_size=0;
- int tree_size_max=xbt_dynar_length(g->nodes)-1;
- xbt_edge_t *tree = xbt_new0(xbt_edge_t,tree_size_max);
- xbt_edge_t e,edge;
+ int tree_size = 0;
+ int tree_size_max = xbt_dynar_length(g->nodes) - 1;
+ xbt_edge_t *tree = xbt_new0(xbt_edge_t, tree_size_max);
+ xbt_edge_t e, edge;
xbt_node_t node = NULL;
xbt_dynar_t edge_list = NULL;
- xbt_heap_t heap = xbt_heap_new(10,NULL);
- int cursor;
+ xbt_heap_t heap = xbt_heap_new(10, NULL);
+ unsigned int cursor;
- xbt_assert0(!(g->directed),
- "Spanning trees do not make sense on directed graphs");
+ xbt_assert(!(g->directed),
+ "Spanning trees do not make sense on directed graphs");
xbt_dynar_foreach(g->nodes, cursor, node) {
node->xbtdata = NULL;
}
- node = xbt_dynar_getfirst_as(g->nodes,xbt_node_t);
- node->xbtdata = (void*) 1;
+ node = xbt_dynar_getfirst_as(g->nodes, xbt_node_t);
+ node->xbtdata = (void *) 1;
edge_list = node->out;
xbt_dynar_foreach(edge_list, cursor, e)
- xbt_heap_push(heap,e, -(e->length));
-
- while((edge=xbt_heap_pop(heap))) {
- if((edge->src->xbtdata) && (edge->dst->xbtdata)) continue;
- tree[tree_size++]=edge;
- if(!(edge->src->xbtdata)) {
- edge->src->xbtdata = (void*) 1;
+ xbt_heap_push(heap, e, -(e->length));
+
+ while ((edge = xbt_heap_pop(heap))) {
+ if ((edge->src->xbtdata) && (edge->dst->xbtdata))
+ continue;
+ tree[tree_size++] = edge;
+ if (!(edge->src->xbtdata)) {
+ edge->src->xbtdata = (void *) 1;
edge_list = edge->src->out;
xbt_dynar_foreach(edge_list, cursor, e) {
- xbt_heap_push(heap,e, -(e->length));
+ xbt_heap_push(heap, e, -(e->length));
}
} else {
- edge->dst->xbtdata = (void*) 1;
+ edge->dst->xbtdata = (void *) 1;
edge_list = edge->dst->out;
xbt_dynar_foreach(edge_list, cursor, e) {
- xbt_heap_push(heap,e, -(e->length));
+ xbt_heap_push(heap, e, -(e->length));
}
}
- if(tree_size==tree_size_max) break;
+ if (tree_size == tree_size_max)
+ break;
}
-
+
xbt_heap_free(heap);
return tree;
}
+/** @brief Topological sort on the given graph
+ *
+ * From wikipedia:
+ *
+ * In graph theory, a topological sort of a directed acyclic graph (DAG) is
+ * a linear ordering of its nodes which is compatible with the partial
+ * order R induced on the nodes where x comes before y (xRy) if there's a
+ * directed path from x to y in the DAG. An equivalent definition is that
+ * each node comes before all nodes to which it has edges. Every DAG has at
+ * least one topological sort, and may have many.
+ */
+xbt_node_t *xbt_graph_topo_sort(xbt_graph_t g)
+{
+
+ xbt_node_t *sorted;
+ unsigned int cursor;
+ int idx;
+ xbt_node_t node;
+ unsigned long n;
+
+ n = xbt_dynar_length(g->nodes);
+ idx = n - 1;
+
+ sorted = xbt_malloc(n * sizeof(xbt_node_t));
+
+ xbt_dynar_foreach(g->nodes, cursor, node)
+ node->xbtdata = xbt_new0(int, 1);
+
+ xbt_dynar_foreach(g->nodes, cursor, node)
+ xbt_graph_depth_visit(g, node, sorted, &idx);
+
+ xbt_dynar_foreach(g->nodes, cursor, node) {
+ free(node->xbtdata);
+ node->xbtdata = NULL;
+ }
+
+ return sorted;
+}
+
+/** @brief First-depth graph traversal */
+void xbt_graph_depth_visit(xbt_graph_t g, xbt_node_t n,
+ xbt_node_t * sorted, int *idx)
+{
+ unsigned int cursor;
+ xbt_edge_t edge;
+
+ if (*((int *) (n->xbtdata)) == ALREADY_EXPLORED)
+ return;
+ else if (*((int *) (n->xbtdata)) == CURRENTLY_EXPLORING)
+ THROWF(0, 0, "There is a cycle");
+ else {
+ *((int *) (n->xbtdata)) = CURRENTLY_EXPLORING;
+
+ xbt_dynar_foreach(n->out, cursor, edge) {
+ xbt_graph_depth_visit(g, edge->dst, sorted, idx);
+ }
+
+ *((int *) (n->xbtdata)) = ALREADY_EXPLORED;
+ sorted[(*idx)--] = n;
+ }
+}
+
/********************* Import and Export ******************/
static xbt_graph_t parsed_graph = NULL;
static xbt_dict_t parsed_nodes = NULL;
-static void *(*__parse_node_label_and_data)(xbt_node_t, const char*, const char*) = NULL;
-static void *(*__parse_edge_label_and_data)(xbt_edge_t, const char*, const char*) = NULL;
+static void *(*__parse_node_label_and_data) (xbt_node_t, const char *,
+ const char *) = NULL;
+static void *(*__parse_edge_label_and_data) (xbt_edge_t, const char *,
+ const char *) = NULL;
static void __parse_graph_begin(void)
{
-
- DEBUG0("<graph>");
- if(A_graphxml_graph_isDirected == A_graphxml_graph_isDirected_true)
+ XBT_DEBUG("<graph>");
+ if (A_graphxml_graph_isDirected == A_graphxml_graph_isDirected_true)
parsed_graph = xbt_graph_new_graph(1, NULL);
- else parsed_graph = xbt_graph_new_graph(0, NULL);
+ else
+ parsed_graph = xbt_graph_new_graph(0, NULL);
- parsed_nodes = xbt_dict_new();
+ parsed_nodes = xbt_dict_new_homogeneous(NULL);
}
+
static void __parse_graph_end(void)
{
xbt_dict_free(&parsed_nodes);
- DEBUG0("</graph>");
+ XBT_DEBUG("</graph>");
}
static void __parse_node(void)
{
- xbt_node_t node =
- xbt_graph_new_node(parsed_graph, NULL);
+ xbt_node_t node = xbt_graph_new_node(parsed_graph, NULL);
- DEBUG1("<node name=\"%s\"/>", A_graphxml_node_name);
- if(__parse_node_label_and_data)
- node->data = __parse_node_label_and_data(node,A_graphxml_node_label,
- A_graphxml_node_data);
- xbt_graph_parse_get_double(&(node->position_x),A_graphxml_node_position_x);
- xbt_graph_parse_get_double(&(node->position_y),A_graphxml_node_position_y);
+ XBT_DEBUG("<node name=\"%s\"/>", A_graphxml_node_name);
+ if (__parse_node_label_and_data)
+ node->data = __parse_node_label_and_data(node, A_graphxml_node_label,
+ A_graphxml_node_data);
+ node->position_x = xbt_graph_parse_get_double(A_graphxml_node_position___x);
+ node->position_y = xbt_graph_parse_get_double(A_graphxml_node_position___y);
xbt_dict_set(parsed_nodes, A_graphxml_node_name, (void *) node, NULL);
}
static void __parse_edge(void)
{
- xbt_edge_t edge =
- xbt_graph_new_edge(parsed_graph,
- xbt_dict_get(parsed_nodes,A_graphxml_edge_source),
- xbt_dict_get(parsed_nodes,A_graphxml_edge_target),
- NULL);
-
- if(__parse_edge_label_and_data)
- edge->data = __parse_edge_label_and_data(edge,A_graphxml_edge_label,
- A_graphxml_edge_data);
-
- xbt_graph_parse_get_double(&(edge->length),A_graphxml_edge_length);
-
- DEBUG3("<edge source=\"%s\" target=\"%s\" length=\"%f\"/>",
- (char *) (edge->src)->data,
- (char *) (edge->dst)->data,
- xbt_graph_edge_get_length(edge));
+ xbt_edge_t edge = xbt_graph_new_edge(parsed_graph,
+ xbt_dict_get(parsed_nodes,
+ A_graphxml_edge_source),
+ xbt_dict_get(parsed_nodes,
+ A_graphxml_edge_target),
+ NULL);
+
+ if (__parse_edge_label_and_data)
+ edge->data = __parse_edge_label_and_data(edge, A_graphxml_edge_label,
+ A_graphxml_edge_data);
+
+ edge->length = xbt_graph_parse_get_double(A_graphxml_edge_length);
+
+ XBT_DEBUG("<edge source=\"%s\" target=\"%s\" length=\"%f\"/>",
+ (char *) (edge->src)->data,
+ (char *) (edge->dst)->data, xbt_graph_edge_get_length(edge));
}
+/** @brief Import a graph from a file following the GraphXML format */
xbt_graph_t xbt_graph_read(const char *filename,
- void *(node_label_and_data)(xbt_node_t, const char*, const char*),
- void *(edge_label_and_data)(xbt_edge_t, const char*, const char*))
+ void *(*node_label_and_data) (xbt_node_t,
+ const char *,
+ const char *),
+ void *(*edge_label_and_data) (xbt_edge_t,
+ const char *,
+ const char *))
{
xbt_graph_t graph = NULL;
ETag_graphxml_edge_fun = __parse_edge;
xbt_graph_parse_open(filename);
- xbt_assert1((!xbt_graph_parse()), "Parse error in %s", filename);
+ _XBT_GNUC_UNUSED int res;
+ res = xbt_graph_parse();
+ xbt_assert(!res, "Parse error in %s", filename);
xbt_graph_parse_close();
graph = parsed_graph;
return graph;
}
+/** @brief Export the given graph in the GraphViz formatting for visualization */
void xbt_graph_export_graphviz(xbt_graph_t g, const char *filename,
- const char *(node_name) (xbt_node_t),
- const char *(edge_name) (xbt_edge_t))
+ const char *(node_name) (xbt_node_t),
+ const char *(edge_name) (xbt_edge_t))
{
- int cursor = 0;
+ unsigned int cursor = 0;
xbt_node_t node = NULL;
xbt_edge_t edge = NULL;
FILE *file = NULL;
- const char *name=NULL;
+ const char *name = NULL;
- file=fopen(filename,"w");
- xbt_assert1(file, "Failed to open %s \n",filename);
+ file = fopen(filename, "w");
+ xbt_assert(file, "Failed to open %s \n", filename);
- if(g->directed) fprintf(file,"digraph test {\n");
- else fprintf(file,"graph test {\n");
+ if (g->directed)
+ fprintf(file, "digraph test {\n");
+ else
+ fprintf(file, "graph test {\n");
- fprintf(file," graph [overlap=scale]\n");
+ fprintf(file, " graph [overlap=scale]\n");
+
+ fprintf(file, " node [shape=box, style=filled]\n");
+ fprintf(file,
+ " node [width=.3, height=.3, style=filled, color=skyblue]\n\n");
- fprintf(file," node [shape=box, style=filled]\n");
- fprintf(file," node [width=.3, height=.3, style=filled, color=skyblue]\n\n");
-
xbt_dynar_foreach(g->nodes, cursor, node) {
- fprintf(file," \"%p\" ", node);
- if((node_name)&&((name=node_name(node)))) fprintf(file,"[label=\"%s\"]",name);
- fprintf(file,";\n");
+ if (node_name){
+ fprintf(file, " \"%s\";\n", node_name(node));
+ }else{
+ fprintf(file, " \"%p\";\n", node);
+ }
}
xbt_dynar_foreach(g->edges, cursor, edge) {
- if(g->directed)
- fprintf(file," \"%p\" -> \"%p\"",edge->src, edge->dst);
- else
- fprintf(file," \"%p\" -- \"%p\"",edge->src, edge->dst);
- if((edge_name)&&((name=edge_name(edge)))) fprintf(file,"[label=\"%s\"]",name);
- fprintf(file,";\n");
+ const char *c;
+ const char *c_dir = "->";
+ const char *c_ndir = "--";
+ if (g->directed){
+ c = c_dir;
+ }else{
+ c = c_ndir;
+ }
+ const char *src_name, *dst_name;
+ if (node_name){
+ src_name = node_name(edge->src);
+ dst_name = node_name(edge->dst);
+ fprintf(file, " \"%s\" %s \"%s\"", src_name, c, dst_name);
+ }else{
+ fprintf(file, " \"%p\" %s \"%p\"", edge->src, c, edge->dst);
+ }
+
+ if ((edge_name) && ((name = edge_name(edge))))
+ fprintf(file, "[label=\"%s\"]", name);
+ fprintf(file, ";\n");
}
- fprintf(file,"}\n");
+ fprintf(file, "}\n");
fclose(file);
}
+/** @brief Export the given graph in the GraphXML format */
void xbt_graph_export_graphxml(xbt_graph_t g, const char *filename,
- const char *(node_name)(xbt_node_t),
- const char *(edge_name)(xbt_edge_t),
- const char *(node_data_print)(void *),
- const char *(edge_data_print)(void *))
+ const char *(node_name) (xbt_node_t),
+ const char *(edge_name) (xbt_edge_t),
+ const char *(node_data_print) (void *),
+ const char *(edge_data_print) (void *))
{
- int cursor = 0;
+ unsigned int cursor = 0;
xbt_node_t node = NULL;
xbt_edge_t edge = NULL;
FILE *file = NULL;
const char *name = NULL;
- file=fopen(filename,"w");
- xbt_assert1(file, "Failed to open %s \n",filename);
+ file = fopen(filename, "w");
+ xbt_assert(file, "Failed to open %s \n", filename);
- fprintf(file,"<?xml version='1.0'?>\n");
- fprintf(file,"<!DOCTYPE graph SYSTEM \"graphxml.dtd\">\n");
- if(g->directed) fprintf(file,"<graph isDirected=\"true\">\n");
- else fprintf(file,"<graph isDirected=\"false\">\n");
+ fprintf(file, "<?xml version='1.0'?>\n");
+ fprintf(file, "<!DOCTYPE graph SYSTEM \"graphxml.dtd\">\n");
+ if (g->directed)
+ fprintf(file, "<graph isDirected=\"true\">\n");
+ else
+ fprintf(file, "<graph isDirected=\"false\">\n");
xbt_dynar_foreach(g->nodes, cursor, node) {
- fprintf(file," <node name=\"%p\" ", node);
- if((node_name)&&((name=node_name(node)))) fprintf(file,"label=\"%s\" ",name);
- if((node_data_print)&&((name=node_data_print(node->data))))
- fprintf(file,"data=\"%s\" ",name);
- fprintf(file,">\n");
+ fprintf(file, " <node name=\"%p\" ", node);
+ if ((node_name) && ((name = node_name(node))))
+ fprintf(file, "label=\"%s\" ", name);
+ if ((node_data_print) && ((name = node_data_print(node->data))))
+ fprintf(file, "data=\"%s\" ", name);
+ fprintf(file, ">\n");
}
xbt_dynar_foreach(g->edges, cursor, edge) {
- fprintf(file," <edge source=\"%p\" target =\"%p\" ",
- edge->src, edge->dst );
- if((edge_name)&&((name=edge_name(edge)))) fprintf(file,"label=\"%s\" ",name);
- if(edge->length>=0.0) fprintf(file,"length=\"%g\" ",edge->length);
- if((edge_data_print)&&((name=edge_data_print(edge->data))))
- fprintf(file,"data=\"%s\" ",name);
- fprintf(file,">\n");
+ fprintf(file, " <edge source=\"%p\" target =\"%p\" ",
+ edge->src, edge->dst);
+ if ((edge_name) && ((name = edge_name(edge))))
+ fprintf(file, "label=\"%s\" ", name);
+ if (edge->length >= 0.0)
+ fprintf(file, "length=\"%g\" ", edge->length);
+ if ((edge_data_print) && ((name = edge_data_print(edge->data))))
+ fprintf(file, "data=\"%s\" ", name);
+ fprintf(file, ">\n");
}
- fprintf(file,"</graph>\n");
+ fprintf(file, "</graph>\n");
fclose(file);
}
-xbt_node_t* xbt_graph_topo_sort(xbt_graph_t g)
+/** @brief Load a graph from a file (in the SimGrid Graph format) */
+xbt_graph_t xbt_graph_load (const char *filename)
{
-
- xbt_node_t* sorted;
- int cursor,idx;
- xbt_node_t node;
- unsigned long n;
-
- n= xbt_dynar_length(g->nodes);
- idx=n-1;
-
- sorted=xbt_malloc(n*sizeof(xbt_node_t));
- xbt_dynar_foreach(g->nodes,cursor , node)
- {
- node->xbtdata=xbt_new0(int,1);
- }
+ FILE *file = NULL;
+ ssize_t read;
+ file = fopen (filename, "r");
+ xbt_assert(file, "Failed to open %s \n", filename);
+
+ xbt_dict_t nodes_dict = xbt_dict_new_homogeneous(NULL);
+ xbt_graph_t ret = xbt_graph_new_graph (0, NULL);
+
+ //read the number of nodes
+ size_t size;
+ char *nnodes_str = NULL;
+ read = getline (&nnodes_str, &size, file);
+ if (read == -1)
+ THROWF(system_error, 0, "getline failed to read the number of nodes (errno = %d)", errno);
+ int i, nnodes = atoi (nnodes_str);
+ free (nnodes_str);
+
+ //read all nodes
+ for (i = 0; i < nnodes; i++){
+ char *node_str = NULL;
+ read = getline (&node_str, &size, file);
+ if (read == -1)
+ THROWF(system_error, 0, "getline failed to read all nodes (errno = %d)", errno);
+ xbt_node_t n;
+ char *name = xbt_strdup (node_str);
+ xbt_str_subst (name, '\n', '\0', 0);
+ n = xbt_graph_new_node (ret, name);
+ xbt_dict_set (nodes_dict, name, n, NULL);
+ free (node_str);
+ }
- xbt_dynar_foreach(g->nodes,cursor , node)
- {
- xbt_graph_depth_visit(g,node,sorted,&idx);
- }
-
- return sorted;
+ //read the number of edges
+ char *nedges_str = NULL;
+ read = getline (&nedges_str, &size, file);
+ if (read == -1)
+ THROWF(system_error, 0, "getline failed to read the number of edges (errno = %d)", errno);
+ int nedges = atoi (nedges_str);
+ free (nedges_str);
+
+ //read all edges
+ for (i = 0; i < nedges; i++){
+ char *edge_str = NULL, edge_id[200], node_source[200], node_target[200];
+ read = getline (&edge_str, &size, file);
+ if (read == -1)
+ THROWF(system_error, 0, "getline failed to read all edges (errno = %d)", errno);
+ sscanf (edge_str, "%s %s %s", edge_id, node_source, node_target);
+ free (edge_str);
+ xbt_str_subst (edge_id, '\n', '\0', 0);
+ xbt_str_subst (node_source, '\n', '\0', 0);
+ xbt_str_subst (node_target, '\n', '\0', 0);
+
+ xbt_node_t source = xbt_dict_get (nodes_dict, node_source);
+ xbt_node_t target = xbt_dict_get (nodes_dict, node_target);
+ xbt_graph_new_edge (ret, source, target, xbt_strdup(edge_id));
+ }
+ xbt_dict_free (&nodes_dict);
+ return ret;
}
-void xbt_graph_depth_visit(xbt_graph_t g,xbt_node_t n,xbt_node_t* sorted,int* idx )
+/** @brief Save a graph from a file (in the SimGrid Graph format) */
+void xbt_graph_save (xbt_graph_t span,
+ const char *filename,
+ const char *(nname) (xbt_node_t),
+ const char *(ename) (xbt_edge_t))
{
- int cursor;
+ FILE *file = NULL;
+ file = fopen(filename, "w");
+ xbt_assert(file, "Failed to open %s \n", filename);
+
+ xbt_dynar_t nodes = xbt_graph_get_nodes (span);
+ xbt_dynar_t edges = xbt_graph_get_edges (span);
+ unsigned int cpt;
+ xbt_node_t node;
+ fprintf (file, "%lu\n", xbt_dynar_length (nodes));
+ xbt_dynar_foreach (nodes, cpt, node) {
+ if (nname){
+ fprintf (file, "%s\n", nname(node));
+ }else{
+ fprintf (file, "%p\n", node);
+ }
+ }
+ fprintf (file, "%lu\n", xbt_dynar_length (edges));
xbt_edge_t edge;
-
- if (*((int*)(n->xbtdata))==ALREADY_EXPLORED)
- return;
- else if (*((int*)(n->xbtdata))==CURRENTLY_EXPLORING)
- THROW0(0,0,"There is a cycle");
- else
- {
- *((int*)(n->xbtdata))=CURRENTLY_EXPLORING;
-
- xbt_dynar_foreach(n->out,cursor, edge)
- {
- xbt_graph_depth_visit(g,edge->dst,sorted,idx);
- }
-
- *((int*)(n->xbtdata))=ALREADY_EXPLORED;
- sorted[(*idx)--]=n;
- }
+ xbt_dynar_foreach (edges, cpt, edge) {
+ xbt_node_t source = xbt_graph_edge_get_source (edge);
+ xbt_node_t target = xbt_graph_edge_get_target (edge);
+ if (ename){
+ if (nname){
+ fprintf (file, "%s %s %s\n", ename(edge), nname(source), nname(target));
+ }else{
+ fprintf (file, "%s %p %p\n", ename(edge), source, target);
+ }
+ }else{
+ if (nname){
+ fprintf (file, "%p %s %s\n", edge, nname(source), nname(target));
+ }else{
+ fprintf (file, "%p %p %p\n", edge, source, target);
+ }
+ }
+ }
+ fclose (file);
}
