diff options
Diffstat (limited to 'src/lib/eina_graph_dfs.c')
-rw-r--r-- | src/lib/eina_graph_dfs.c | 41 |
1 files changed, 19 insertions, 22 deletions
diff --git a/src/lib/eina_graph_dfs.c b/src/lib/eina_graph_dfs.c index 7951b3c..1b9a61a 100644 --- a/src/lib/eina_graph_dfs.c +++ b/src/lib/eina_graph_dfs.c @@ -38,6 +38,7 @@ _eina_graph_dfs_swalk(_Eina_Graph *_g, _Eina_Graph_DFS *_dfs, unsigned int v) { Eina_List *stack = NULL; _Eina_Graph_Adjacents *adjs; + _Eina_Graph_DFS_Data *vd; unsigned int p, w, n, i; p = v; @@ -48,9 +49,10 @@ _eina_graph_dfs_swalk(_Eina_Graph *_g, _Eina_Graph_DFS *_dfs, unsigned int v) w = CAST_D(eina_list_data_get(stack)); stack = eina_list_remove(stack, CAST_V(w)); - if(_dfs->marked[w]) continue; - _dfs->marked[w] = EINA_TRUE; - _dfs->edge_to[w] = p; + vd = &_dfs->data[w]; + if(vd->m) continue; + vd->m = EINA_TRUE; + vd->e = p; p = w; adjs = &_g->adjs[w]; @@ -58,7 +60,7 @@ _eina_graph_dfs_swalk(_Eina_Graph *_g, _Eina_Graph_DFS *_dfs, unsigned int v) for (i = 0; i < n; i++) { w = adjs->data[i]; - if (!_dfs->marked[w]) + if (!_dfs->data[w].m) { stack = eina_list_prepend(stack, CAST_V(w)); } @@ -70,19 +72,21 @@ static void _eina_graph_dfs_rwalk(_Eina_Graph *_g, _Eina_Graph_DFS *_dfs, unsigned int v) { _Eina_Graph_Adjacents *adjs; + _Eina_Graph_DFS_Data *vd; unsigned int i, n, w; - _dfs->marked[v] = EINA_TRUE; + _dfs->data[v].m = EINA_TRUE; adjs = &_g->adjs[v]; n = adjs->count; for (i = 0; i < n; i++) { w = adjs->data[i]; - if (!_dfs->marked[w]) + vd = &_dfs->data[w]; + if (!vd->m) { _eina_graph_dfs_rwalk(_g, _dfs, w); - _dfs->edge_to[w] = v; + vd->e = v; } } } @@ -97,13 +101,9 @@ eina_graph_dfs_new(Eina_Graph *g, unsigned int s, Eina_Bool r) if (!_dfs) goto error_dfs; - _dfs->marked = calloc(_g->vertices, sizeof(Eina_Bool)); - if (!_dfs->marked) - goto error_marked; - - _dfs->edge_to = calloc(_g->vertices, sizeof(unsigned int)); - if (!_dfs->edge_to) - goto error_edge_to; + _dfs->data = calloc(_g->vertices, sizeof(_Eina_Graph_DFS_Data)); + if (!_dfs->data) + goto error_data; _dfs->s = s; _dfs->vertices = _g->vertices; @@ -115,9 +115,7 @@ eina_graph_dfs_new(Eina_Graph *g, unsigned int s, Eina_Bool r) return (Eina_Graph_DFS *) _dfs; -error_edge_to: - free(_dfs->marked); -error_marked: +error_data: free(_dfs); error_dfs: ERR("calloc failed : %s", strerror(errno)); @@ -129,8 +127,7 @@ eina_graph_dfs_free(Eina_Graph_DFS *dfs) { _Eina_Graph_DFS *_dfs = (_Eina_Graph_DFS *) dfs; - free(_dfs->marked); - free(_dfs->edge_to); + free(_dfs->data); free(_dfs); } @@ -153,7 +150,7 @@ eina_graph_dfs_has_path_to(Eina_Graph_DFS *dfs, unsigned int v) return EINA_FALSE; } - return _dfs->marked[v]; + return _dfs->data[v].m; } EAPI Eina_List * @@ -169,13 +166,13 @@ eina_graph_dfs_path_to(Eina_Graph_DFS *dfs, unsigned int v) return NULL; } - if (!_dfs->marked[v]) + if (!_dfs->data[v].m) return NULL; while (w != _dfs->s) { path = eina_list_prepend(path, CAST_V(w)); - w = _dfs->edge_to[w]; + w = _dfs->data[w].e; } path = eina_list_prepend(path, CAST_V(_dfs->s)); |