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authorJulian T <julian@jtle.dk>2020-02-15 20:28:59 +0100
committerJulian T <julian@jtle.dk>2020-02-15 20:28:59 +0100
commit8076d839bf69e619f2e504122ec2ceb790a0b978 (patch)
treefa6cb7c649939c3a002676ce142105360d3d2fd6 /sem3/algo/workshop2/dfs/graph.c
parentf17e8e195bd1ee3f911ae311dce8e8f7df4f8457 (diff)
Changed to a more consistent codestyle
Diffstat (limited to 'sem3/algo/workshop2/dfs/graph.c')
-rw-r--r--sem3/algo/workshop2/dfs/graph.c64
1 files changed, 38 insertions, 26 deletions
diff --git a/sem3/algo/workshop2/dfs/graph.c b/sem3/algo/workshop2/dfs/graph.c
index 0f5048c..0ad4467 100644
--- a/sem3/algo/workshop2/dfs/graph.c
+++ b/sem3/algo/workshop2/dfs/graph.c
@@ -6,7 +6,8 @@
#include "graph.h"
// Hashtable
-static unsigned int hash(char *s) {
+static unsigned int hash(char *s)
+{
uint32_t hv = 0;
for( int i = 0; s[i] != '\0'; i++ ) {
// take MSB 6 bits of hv and xors with LSB of s[i]
@@ -20,7 +21,8 @@ static unsigned int hash(char *s) {
}
-static void table_insert(graph_t *g, vertex_t *v, char *var) {
+static void table_insert(graph_t *g, vertex_t *v, char *var)
+{
unsigned int index = hash(var);
// Save old value
@@ -33,19 +35,21 @@ static void table_insert(graph_t *g, vertex_t *v, char *var) {
g->hashtable[index]->next = oldSym;
}
-static vertex_t *table_lookup(graph_t *g, char *var) {
+static vertex_t *table_lookup(graph_t *g, char *var)
+{
unsigned int index = hash(var);
vertex_t *n = g->hashtable[index];
// Look trough list
- while(n != NULL && strcmp(n->ref, var) != 0) {
+ while (n != NULL && strcmp(n->ref, var) != 0) {
n = n->next;
}
return n;
}
-static vertex_t *create_vertex(char *ref) {
+static vertex_t *create_vertex(char *ref)
+{
// Get some space TODO check for null
vertex_t *v = malloc(sizeof(vertex_t));
@@ -57,7 +61,8 @@ static vertex_t *create_vertex(char *ref) {
return v;
}
-static edge_t *create_edge(vertex_t *from, vertex_t *to, int weight) {
+static edge_t *create_edge(vertex_t *from, vertex_t *to, int weight)
+{
edge_t *old = from->adj;
// Create new list node
@@ -68,12 +73,14 @@ static edge_t *create_edge(vertex_t *from, vertex_t *to, int weight) {
// Do new link
e->next = old;
- if( old ) {
+ if ( old ) {
e->prev = old->prev;
old->prev = e;
- } else { e->prev = NULL; }
+ } else {
+ e->prev = NULL;
+ }
- if( e->prev ) {
+ if ( e->prev ) {
e->prev->next = e;
}
@@ -83,16 +90,17 @@ static edge_t *create_edge(vertex_t *from, vertex_t *to, int weight) {
}
// For iterating edges
-edge_t *edge_next(graph_t *g, edge_t *e) {
- if(e == NULL || e->next == NULL ) {
+edge_t *edge_next(graph_t *g, edge_t *e)
+{
+ if (e == NULL || e->next == NULL ) {
// Find next index
vertex_t *v = e ? e->from : NULL;
// Find next vertex
v = vertex_next(g, v);
- while( v ) {
+ while ( v ) {
// Check if found
- if( v->adj ) {
+ if ( v->adj ) {
return v->adj;
}
@@ -107,12 +115,13 @@ edge_t *edge_next(graph_t *g, edge_t *e) {
return e->next;
}
-vertex_t *vertex_next(graph_t *g, vertex_t *v) {
- if( v == NULL || v->next == NULL) {
+vertex_t *vertex_next(graph_t *g, vertex_t *v)
+{
+ if ( v == NULL || v->next == NULL) {
// Go to next index in hashtable
int i = v ? hash(v->ref)+1 : 0;
- for( ; i < HASHSIZE; i++) {
- if( g->hashtable[i] ) {
+ for ( ; i < HASHSIZE; i++) {
+ if ( g->hashtable[i] ) {
return g->hashtable[i];
}
}
@@ -124,15 +133,16 @@ vertex_t *vertex_next(graph_t *g, vertex_t *v) {
return v->next;
}
-void graph_edge(graph_t *g, char *from, char *to, int weight) {
+void graph_edge(graph_t *g, char *from, char *to, int weight)
+{
vertex_t *fromv, *tov;
// Does a exists
- if( (fromv = table_lookup(g, from)) == NULL ) {
+ if ( (fromv = table_lookup(g, from)) == NULL ) {
fromv = create_vertex(from);
table_insert(g, fromv, from);
}
// What about b
- if( (tov = table_lookup(g, to)) == NULL ) {
+ if ( (tov = table_lookup(g, to)) == NULL ) {
tov = create_vertex(to);
table_insert(g, tov, to);
}
@@ -141,15 +151,16 @@ void graph_edge(graph_t *g, char *from, char *to, int weight) {
create_edge(fromv, tov, weight);
}
-int graph_print_adj(graph_t *g, char *ref) {
+int graph_print_adj(graph_t *g, char *ref)
+{
vertex_t *v = table_lookup(g, ref);
- if( v == NULL ) {
+ if ( v == NULL ) {
return 1;
}
edge_t *e = v->adj;
printf("[ ");
- while(e && e->from->ref == ref) {
+ while (e && e->from->ref == ref) {
printf("%s[%d] ", e->to->ref, e->weight);
e = e->next;
}
@@ -158,19 +169,20 @@ int graph_print_adj(graph_t *g, char *ref) {
return 0;
}
-int graph_to_dot(FILE *f, graph_t *g) {
+int graph_to_dot(FILE *f, graph_t *g)
+{
// print pre stuff
fprintf(f, "digraph coolgraph {\n");
// Label all nodes
vertex_t *v = vertex_next(g, NULL);
- while( v ) {
+ while ( v ) {
fprintf(f, "%s [label=\"%s\"];\n", v->ref, v->ref);
v = vertex_next(g, v);
}
// Print all the edges
edge_t *e = edge_next(g, NULL);
- while( e ) {
+ while ( e ) {
fprintf(f, "%s -> %s [label = %d];\n", e->from->ref, e->to->ref, e->weight);
e = edge_next(g, e);
}