5 files changed, 0 insertions, 374 deletions

diff --git a/sem1/algo/workshop2/dfs/Makefile b/sem1/algo/workshop2/dfs/Makefile
deleted file mode 100644
index 790bb94..0000000
--- a/sem1/algo/workshop2/dfs/Makefile
+++ /dev/null
@@ -1,41 +0,0 @@
-CC = gcc
-# Enable gdb and pull include files from current dir
-CFLAGS = -ggdb -I.
-LDFLAGS = 
-
-BINARY = dfs
-BUILD_DIR = build
-
-# Capture c files 
-c_files = $(wildcard *.c)
-
-# Convert c names to corrosponding o names
-OBJ = $(patsubst %.c, $(BUILD_DIR)/%.o, $(c_files))
-
-# $@ is the %.o file and $^ is the %.c file
-$(BUILD_DIR)/%.o: %.c
-	mkdir -p $(dir $@)
-	$(CC) -c -o $@ $^ $(CFLAGS)
-
-# $@ becomes left part thus linked
-$(BINARY): $(OBJ)
-	$(CC) -o $@ $^ $(LDFLAGS)
-
-.PHONY: clean run
-
-run: $(BINARY)
-	./$(BINARY)
-
-hej.png: hej.dot
-	dot -Tpng hej.dot > hej.png
-
-hej.dot: $(BINARY)
-	./$(BINARY) > hej.dot
-
-draw: hej.png
-	nomacs hej.png
-
-clean:
-	rm -f $(OBJ) $(BINARY)
-	rm hej*
-	rmdir $(BUILD_DIR)
diff --git a/sem1/algo/workshop2/dfs/dfs b/sem1/algo/workshop2/dfs/dfs
deleted file mode 100755
index 0d9ff14..0000000
--- a/sem1/algo/workshop2/dfs/dfs
+++ /dev/null
diff --git a/sem1/algo/workshop2/dfs/dfs.c b/sem1/algo/workshop2/dfs/dfs.c
deleted file mode 100644
index 1244895..0000000
--- a/sem1/algo/workshop2/dfs/dfs.c
+++ /dev/null
@@ -1,107 +0,0 @@
-#include <stdio.h>
-#include <stdbool.h>
-#include <time.h>
-#include <string.h>
-#include <stdlib.h>
-
-#include "graph.h"
-
-graph_t g;
-graph_t newg;
-int step;
-
-void dfs_visit(graph_t *g, vertex_t *u, bool doprint) {
-	if( doprint ) {
-		printf("dfs_visit( %s )\n", u->ref);
-	}
-	step++;
-	u->dtime = step;
-	u->color = COLOR_GRAY;
-	
-	// For every adj
-	edge_t *e = u->adj;
-	while( e ) {
-		vertex_t *v = e->to;
-		if( v->color == COLOR_WHITE ) {
-			graph_edge(&newg, v->ref, u->ref, 1);
-			dfs_visit(g, v, doprint);
-		}
-		e = e->next;
-	}
-
-	u->color = COLOR_BLACK;
-	step++;
-	u->ftime = step;
-}
-
-
-void dfs(graph_t *g, bool doprint) {
-	step = 0;
-
-	// For every edge
-	vertex_t *u = vertex_next(g, NULL);
-	while( u ) {
-		if( u->color == COLOR_WHITE ) {
-			dfs_visit(g, u, doprint);
-		}
-		u = vertex_next(g, u);
-	}
-}
-
-#define BENCH 9999
-
-int main() {
-
-	// benchmark
-
-	// Start by generating
-	for(int i = 0; i < BENCH; i++) {
-		char from[5];
-		char to[5];
-		sprintf(from, "%d", i);
-		sprintf(to, "%d", rand() % BENCH);
-		graph_edge(&g, from, to, 1);
-	}
-	FILE *f = fopen("hej.dot", "w");
-	graph_to_dot(f, &g);
-
-	{
-		// Timing start
-		clock_t t;
-		t = clock();
-
-		dfs(&g, true);
-
-		// Timing stop
-		t = clock() - t;
-		double time_taken = ((double)t)/CLOCKS_PER_SEC; // in seconds
-		printf("Dfs took %f seconds\n", time_taken);
-	}
-	
-	return 0;
-	
-	graph_edge(&g, "hej", "med", 1);
-	graph_edge(&g, "med", "dig", 1);
-	graph_edge(&g, "dig", "hvordan", 1);
-
-	graph_edge(&g, "det", "hvordan", 1);
-	graph_edge(&g, "hvordan", "det", 1);
-
-	graph_to_dot(stdout, &g);
-	
-	// Timing start
-	clock_t t;
-	t = clock();
-
-	// Dfs slower when printing.
-	dfs(&g, true);
-
-	// Timing stop
-	t = clock() - t;
-	double time_taken = ((double)t)/CLOCKS_PER_SEC; // in seconds
-	printf("Dfs took %f seconds\n", time_taken);
-
-	//graph_to_dot(stdout, &newg);
-
-	return 0;
-}
diff --git a/sem1/algo/workshop2/dfs/graph.c b/sem1/algo/workshop2/dfs/graph.c
deleted file mode 100644
index 0f5048c..0000000
--- a/sem1/algo/workshop2/dfs/graph.c
+++ /dev/null
@@ -1,181 +0,0 @@
-#include <stdio.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "graph.h"
-
-// Hashtable
-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]
-		uint32_t v = ( hv >> 26 ) ^ (s[i] & 0x3f);
-
-		// Push those back on hv
-		hv = (hv << 4) | v;
-	}
-	// Return appropriate size
-	return hv % HASHSIZE;
-}
-
-
-static void table_insert(graph_t *g, vertex_t *v, char *var) {
-	unsigned int index = hash(var);
-
-	// Save old value
-	vertex_t *oldSym = g->hashtable[index];
-
-	// Make new
-	g->hashtable[index] = v;
-
-	// Link old one
-	g->hashtable[index]->next = oldSym;
-}
-
-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) {
-		n = n->next;
-	}
-
-	return n;
-}
-
-static vertex_t *create_vertex(char *ref) {
-	// Get some space TODO check for null
-	vertex_t *v = malloc(sizeof(vertex_t));
-
-	// Set values
-	v->ref = strdup(ref);
-	v->color = COLOR_WHITE;
-	v->next = NULL;
-	v->adj = NULL;
-	return v;
-}
-
-static edge_t *create_edge(vertex_t *from, vertex_t *to, int weight) {
-	edge_t *old = from->adj;
-
-	// Create new list node
-	edge_t *e = malloc(sizeof(edge_t));
-	e->weight = weight;
-	e->from = from;
-	e->to = to;
-
-	// Do new link
-	e->next = old;
-	if( old ) {
-		e->prev = old->prev;
-		old->prev = e;
-	} else { e->prev = NULL; }
-	
-	if( e->prev ) {
-		e->prev->next = e;
-	}
-
-	from->adj = e;
-
-	return e;
-}
-
-// For iterating edges
-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 ) {
-			// Check if found
-			if( v->adj ) {
-				return v->adj;
-			}
-
-			v = vertex_next(g, v);
-		}
-
-		// No next vertex
-		return NULL;
-	}
-
-	// Not finished with this adj list
-	return e->next;
-}
-
-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] ) {
-				return g->hashtable[i];
-			}
-		}
-
-		// No next
-		return NULL;
-	}
-
-	return v->next;
-}
-
-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 ) {
-		fromv = create_vertex(from);
-		table_insert(g, fromv, from);
-	}
-	// What about b
-	if( (tov = table_lookup(g, to)) == NULL ) {
-		tov = create_vertex(to);
-		table_insert(g, tov, to);
-	}
-
-	// Add edge
-	create_edge(fromv, tov, weight);
-}
-
-int graph_print_adj(graph_t *g, char *ref) {
-	vertex_t *v = table_lookup(g, ref);
-	if( v == NULL ) {
-		return 1;
-	}
-	
-	edge_t *e = v->adj;
-	printf("[ ");
-	while(e && e->from->ref == ref) {
-		printf("%s[%d] ", e->to->ref, e->weight);
-		e = e->next;
-	}
-	printf("]\n");
-
-	return 0;
-}
-
-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 ) {
-		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 ) {
-		fprintf(f, "%s -> %s [label = %d];\n", e->from->ref, e->to->ref, e->weight);
-		e = edge_next(g, e);
-	}
-
-	// done
-	fprintf(f, "}\n");
-}
-
diff --git a/sem1/algo/workshop2/dfs/graph.h b/sem1/algo/workshop2/dfs/graph.h
deleted file mode 100644
index e169a8a..0000000
--- a/sem1/algo/workshop2/dfs/graph.h
+++ /dev/null
@@ -1,45 +0,0 @@
-#ifndef GRAPH_H_
-#define GRAPH_H_
-
-#define COLOR_WHITE 0
-#define COLOR_GRAY  1
-#define COLOR_BLACK 2
-
-#define HASHSIZE 128
-
-struct vertex_struct;
-
-// Linked list
-typedef struct edge_struct {
-	int weight;
-	struct vertex_struct *from;
-	struct vertex_struct *to;
-	// Linked list stuff
-	struct edge_struct *next;
-	struct edge_struct *prev;
-} edge_t;
-
-typedef struct vertex_struct {
-	char *ref;
-	int color;
-
-	int dtime;
-	int ftime;
-
-	edge_t *adj;
-
-	// Hash table stuff
-	struct vertex_struct *next;
-} vertex_t;
-
-typedef struct {
-	vertex_t *hashtable[128];
-} graph_t;
-
-int graph_to_dot(FILE *f, graph_t *g);
-int graph_print_adj(graph_t *g, char *ref);
-void graph_edge(graph_t *g, char *from, char *to, int weight);
-edge_t *edge_next(graph_t *g, edge_t *e);
-vertex_t *vertex_next(graph_t *g, vertex_t *v);
-
-#endif // GRAPH_H_