Refactored headers for cleaner design, started stage 1

Makefile

@@ -16,12 +16,15 @@
 #	gcc -Wall -Wextra -Werror -pedantic -g -o main.o main.c -c
 
 # Link command:
-voronoi2: common.o dcel.o voronoi.o input.o main.o
-	gcc -Wall -Wextra -Werror -pedantic -g -o voronoi2 main.o input.o voronoi.o dcel.o common.o
+voronoi2: common.o geometry.o dcel.o voronoi.o input.o main.o
+	gcc -Wall -Wextra -Werror -pedantic -g -o voronoi2 main.o input.o voronoi.o dcel.o geometry.o common.o
 
 common.o: common.c
 	gcc -Wall -Wextra -Werror -pedantic -g -o common.o common.c -c
 
+geometry.o: geometry.c
+	gcc -Wall -Wextra -Werror -pedantic -g -o geometry.o geometry.c -c
+
 dcel.o: dcel.c
 	gcc -Wall -Wextra -Werror -pedantic -g -o dcel.o dcel.c -c
 

common.c

@@ -2,7 +2,7 @@
  *
  * Created by Rory Healy (healyr@student.unimelb.edu.au)
  * Created on 25th August 2021
- * Last modified 8th September 2021
+ * Last modified 9th September 2021
  *
  * Contains functions for general use throughout other files.
  *
@@ -12,10 +12,18 @@
 #include "common.h"
 #endif 
 
-/* Checks if a given pointer is null. Used for malloc() and realloc(). */
 void checkNullPointer(void *ptr) {
 	if (!ptr) {
 		fputs("Error: Cannot allocate memory.\n", stderr);
 		exit(EXIT_FAILURE);
 	}
 }
+
+FILE *safeFileOpen(FILE **f, char *fileName, char *mode) {
+    *f = fopen(fileName, mode);
+    if (*f == NULL) {
+        fprintf(stderr, "Error: Unable to open file %s\n", fileName);
+        exit(EXIT_FAILURE);
+    }
+    return *f;
+}

common.h

@@ -12,9 +12,20 @@
 
 #endif
 
+#ifndef STRING_HEADER
+#define STRING_HEADER
+
+#include <string.h>
+
+#endif
+
 #ifndef COMMON_HEADER
 #define COMMON_HEADER
 
+/* Checks if a pointer assigned through dynamic memory allocation is NULL */
 void checkNullPointer(void *ptr);
 
+/* Opens a file and checks if the file is safe to use */
+FILE *safeFileOpen(FILE **f, char *fileName, char *mode);
+
 #endif

dcel.c

@@ -2,7 +2,7 @@
  *
  * Created by Rory Healy (healyr@student.unimelb.edu.au)
  * Created on 25th August 2021
- * Last modified 25th August 2021
+ * Last modified 9th September 2021
  *
  * Contains functions for the DCEL data structure, including creating, 
  * splitting an edge, and identifying towers in faces.
@@ -17,36 +17,17 @@
 #include "common.h"
 #endif
 
-struct halfEdge {
-    halfEdge_t *previous;
-    halfEdge_t *next;
-    halfEdge_t *twin;
-    int face;
-    int edge;
-};
-
-struct vertex {
-    double x;
-    double y;
-};
-
-struct edge {
-    halfEdge_t halfEdge;
-};
-
-struct face {
-    halfEdge_t start;
-};
-
 /* Reads the polygon file and stores the information in the vertices array. */
-vertex_t **readPolygon(vertex_t **vertices, FILE *polygonFile, int *numVertices) {
+vertex_t **readPolygon(vertex_t **vertices, FILE *polygonFile, \
+    int *numVertices) {
     double currentX, currentY;
     int maxSizeVertices = 1;
     while ((fscanf(polygonFile, "%lf %lf", &currentX, &currentY)) != EOF) {
         /* Check if there enough space in the towers array */
         if (*numVertices == maxSizeVertices) {
             maxSizeVertices *= 2;
-            vertex_t **temp = realloc(vertices, maxSizeVertices * sizeof(*vertices));
+            vertex_t **temp = realloc(vertices, \
+                maxSizeVertices * sizeof(*vertices));
             checkNullPointer(temp);
             vertices = temp;
         }

dcel.h

@@ -1,20 +1,32 @@
+#ifndef GEOMETRY_HEADER
+#include "geometry.h"
+#endif
+
 #ifndef STDIO_HEADER
-
-#define STDIO_HEADER
 #include <stdio.h>
-
 #endif
 
 #ifndef DCEL_HEADER
-
 #define DCEL_HEADER
 
-typedef struct halfEdge halfEdge_t;
-typedef struct vertex vertex_t;
-typedef struct edge edge_t;
-typedef struct face face_t;
+typedef struct halfEdge {
+    struct halfEdge *previous;
+    struct halfEdge *next;
+    struct halfEdge *twin;
+    int face;
+    int edge;
+} halfEdge_t;
+
+typedef struct edge {
+    halfEdge_t halfEdge;
+} edge_t;
+
+typedef struct face {
+    halfEdge_t start;
+} face_t;
 
 vertex_t **readPolygon(vertex_t **vertices, FILE *polygonFile, \
     int *numVertices);
 void freeVertices(vertex_t **vertices, int numVertices);
+
 #endif

geometry.c

@@ -0,0 +1,23 @@
+/* geometry.c
+ *
+ * Created by Rory Healy (healyr@student.unimelb.edu.au)
+ * Created on 9th September 2021
+ * Last modified 9th September 2021
+ *
+ * A small library of functions used in the geometric construction of a 
+ * Voronoi diagram.
+ *
+ */
+
+#ifndef GEOMETRY_HEADER
+#include "geometry.h"
+#endif
+
+#ifndef COMMON_HEADER
+#include "common.h"
+#endif
+
+char *getBisectorEquation(vertex_t *vertexA, vertex_t *vertexB) {
+    printf("x: %lf y: %lf\n", vertexA->x, vertexB->y);
+    return "hi";
+}

geometry.h

@@ -0,0 +1,9 @@
+#ifndef GEOMETRY_HEADER
+#define GEOMETRY_HEADER
+
+typedef struct vertex {
+    double x;
+    double y;
+} vertex_t;
+
+#endif

input.c

@@ -2,7 +2,7 @@
  *
  * Created by Rory Healy (healyr@student.unimelb.edu.au)
  * Created on 8th September 2021
- * Last modified 8th September 2021
+ * Last modified 9th September 2021
  *
  * Contains functions for ensuring correct input arguments are given for 
  * each stage of the voronoi2 program.
@@ -13,6 +13,10 @@
 #include "input.h"
 #endif
 
+#ifndef COMMON_HEADER
+#include "common.h"
+#endif
+
 #define STAGE_1_ARG_COUNT 4
 #define STAGE_2_ARG_COUNT 5
 #define STAGE_3_ARG_COUNT 5
@@ -90,12 +94,3 @@ int getExpectedArgs(enum stages stage) {
     }
     return -1;
 }
-
-FILE *safeFileOpen(FILE **f, char *fileName, char *mode) {
-    *f = fopen(fileName, mode);
-    if (*f == NULL) {
-        fprintf(stderr, "Error: Unable to open file %s\n", fileName);
-        exit(EXIT_FAILURE);
-    }
-    return *f;
-}

input.h

@@ -1,24 +1,3 @@
-#ifndef STDIO_HEADER
-#define STDIO_HEADER
-
-#include <stdio.h>
-
-#endif
-
-#ifndef STDLIB_HEADER
-#define STDLIB_HEADER
-
-#include <stdlib.h>
-
-#endif
-
-#ifndef STRING_HEADER
-
-#define STRING_HEADER
-#include <string.h>
-
-#endif
-
 #ifndef INPUT_HEADER
 #define INPUT_HEADER
 
@@ -42,7 +21,4 @@ int getExpectedArgs(enum stages stage);
 /* Prints the corresponding usage strings for a given stage */
 void printArgError(enum stages stage, char *errorMessage);
 
-/* Opens a file and checks if the file is safe to use */
-FILE *safeFileOpen(FILE **f, char *fileName, char *mode);
-
 #endif

main.c

@@ -2,7 +2,7 @@
  *
  * Created by Rory Healy (healyr@student.unimelb.edu.au)
  * Created on 25th August 2021
- * Last modified 8th September 2021
+ * Last modified 9th September 2021
  *
  * Lists the watchtowers that are in each face of the polygon.
  * The polygon can be split using a pair of integers, which represent
@@ -74,54 +74,24 @@ int main(int argc, char **argv) {
     /* Then run the program according to the stage given */
     switch(stage) {
         /* Expected usage: ./voronoi2 1 pointsFile outputFile */
-        case STAGE_1: {
-            FILE *pointsFile = NULL, *outputFile = NULL;
-            pointsFile = safeFileOpen(&pointsFile, argv[2], "r");
-            outputFile = safeFileOpen(&outputFile, argv[3], "w");
-
-            fclose(pointsFile);
-            fclose(outputFile);
+        case STAGE_1:
+            stage1(argv[2], argv[3]);
             break;
-        }
 
         /* Expected usage: ./voronoi2 2 pointsFile polygonFile outputFile */
-        case STAGE_2: {
-            FILE *pointsFile = NULL, *polygonFile = NULL, *outputFile = NULL;
-            pointsFile = safeFileOpen(&pointsFile, argv[2], "r");
-            polygonFile = safeFileOpen(&polygonFile, argv[3], "r");
-            outputFile = safeFileOpen(&outputFile, argv[4], "w");
-
-            fclose(pointsFile);
-            fclose(polygonFile);
-            fclose(outputFile);
+        case STAGE_2:
+            stage2(argv[2], argv[3], argv[4]);
             break;
-        }
 
         /* Expected usage: ./voronoi2 3 dataFile polygonFile outputFile */
-        case STAGE_3: {
-            FILE *dataFile = NULL, *polygonFile = NULL, *outputFile = NULL;
-            dataFile = safeFileOpen(&dataFile, argv[2], "r");
-            polygonFile = safeFileOpen(&polygonFile, argv[3], "r");
-            outputFile = safeFileOpen(&outputFile, argv[4], "w");
-
-            fclose(dataFile);
-            fclose(polygonFile);
-            fclose(outputFile);
+        case STAGE_3:
+            stage3(argv[2], argv[3], argv[4]);
             break;
-        }
 
         /* Expected usage: /voronoi2 4 dataFile polygonFile outputFile */
-        case STAGE_4: {
-            FILE *dataFile = NULL, *polygonFile = NULL, *outputFile = NULL;
-            dataFile = safeFileOpen(&dataFile, argv[2], "r");
-            polygonFile = safeFileOpen(&polygonFile, argv[3], "r");
-            outputFile = safeFileOpen(&outputFile, argv[4], "w");
-
-            fclose(dataFile);
-            fclose(polygonFile);
-            fclose(outputFile);
+        case STAGE_4:
+            stage4(argv[2], argv[3], argv[4]);
             break;
-        }
 
         /* Return error if stage number isn't defined. */  
         case STAGE_ERROR:

voronoi.c

@@ -2,10 +2,11 @@
  *
  * Created by Rory Healy (healyr@student.unimelb.edu.au)
  * Created on 12th August 2021
- * Last modified 25th August 2021
- *
- * Contains functions involving the reading of the dataset CSV file.
+ * Last modified 9th September 2021
  *
+ * Contains functions involving the generation of the Voronoi diagram, and 
+ * running each stage of the assignment.
+ * 
  */
 
 #ifndef COMMON_HEADER
@@ -16,8 +17,6 @@
 #include "voronoi.h"
 #endif
 
-#include <string.h>
-
 #define BASE_10 10
 #define MAX_CSV_ENTRY_LEN 512
 #define MAX_FIELD_LEN 128
@@ -32,13 +31,12 @@ struct tower {
     double y;
 };
 
-/* Reads the CSV file and stores the information in the towers array. */
-tower_t **readTowers(tower_t **towers, FILE* datasetFile, int *numTowers) {
+tower_t **readTowers(tower_t **towers, FILE *datasetFile, int *numTowers) {
     /* Maximum length of a single CSV line */
     size_t lineBufferSize = MAX_CSV_ENTRY_LEN + 1;
 
     /* Stores the current line from the CSV */
-    char *lineBuffer = malloc(lineBufferSize * sizeof(char));
+    char *lineBuffer = malloc(lineBufferSize * sizeof(*lineBuffer));
     checkNullPointer(lineBuffer);
 
     int maxSizetowers = 1;
@@ -57,15 +55,14 @@ tower_t **readTowers(tower_t **towers, FILE* datasetFile, int *numTowers) {
         /* The current tower being filled in with information */
         towers[*numTowers] = malloc(sizeof(*towers[*numTowers]));
 
-        readCurrentLine(lineBuffer, towers[*numTowers]);
+        readCurrentTower(lineBuffer, towers[*numTowers]);
         *numTowers += 1;    
     }
     free(lineBuffer);
     return towers;
 }
 
-/* Takes a line from the CSV and converts the data into a tower_t format */
-void readCurrentLine(char* lineBuffer, tower_t* tower) {
+void readCurrentTower(char *lineBuffer, tower_t *tower) {
     /* Stores the current CSV field for the current line */
     char *token = strtok(lineBuffer, ",");
     size_t tokenLength;
@@ -120,3 +117,103 @@ void freeTowers(tower_t **towers, int numTowers) {
     }
     free(towers);
 }
+
+vertex_t **readPoints(vertex_t **points, FILE *pointsFile, int *numPoints) {
+    /* Current length of a single points line */
+    size_t lineBufferSize = 1;
+
+    /* Stores the current line from the points file */
+    char *lineBuffer = malloc(lineBufferSize * sizeof(*lineBuffer));
+    checkNullPointer(lineBuffer);
+
+    /* Assuming that pointsFile is valid, there must be at least two points */
+    int maxSizePoints = 2;
+
+    while (getline(&lineBuffer, &lineBufferSize, pointsFile) > 0) {
+        /* Check if there is enough space in the points array */
+        if (*numPoints == maxSizePoints) {
+            maxSizePoints *= 2;
+            vertex_t **temp = realloc(points, maxSizePoints * sizeof(*points));
+            checkNullPointer(temp);
+            points = temp;
+        }
+
+        double xCoordinateA, yCoordinateA, xCoordinateB, yCoordinateB;
+        sscanf(lineBuffer, "%lf %lf %lf %lf", &xCoordinateA, &yCoordinateA, \
+            &xCoordinateB, &yCoordinateB);
+        
+        points[*numPoints] = malloc(sizeof(*points[*numPoints]));
+        points[*numPoints]->x = xCoordinateA;
+        points[*numPoints]->y = yCoordinateA;
+        *numPoints += 1;
+
+        points[*numPoints] = malloc(sizeof(*points[*numPoints]));
+        points[*numPoints]->x = xCoordinateB;
+        points[*numPoints]->y = yCoordinateB;
+        *numPoints += 1;
+    }
+
+    free(lineBuffer);
+    return points;
+}
+
+void freePoints(vertex_t **points, int numPoints) {
+    for (int i = 0; i < numPoints; i++) {
+        free(points[i]);
+    }
+    free(points);
+}
+
+void stage1(char *pointsFileName, char *outputFileName) {
+    FILE *pointsFile = NULL, *outputFile = NULL;
+    pointsFile = safeFileOpen(&pointsFile, pointsFileName, "r");
+    outputFile = safeFileOpen(&outputFile, outputFileName, "w");
+    
+    vertex_t **points = malloc(sizeof(*points));
+    checkNullPointer(points);
+    int numPoints = 0;
+    // points = readPoints(points, pointsFile, &numPoints);
+
+    freePoints(points, numPoints);
+    fclose(pointsFile);
+    fclose(outputFile);
+}
+
+void stage2(char *pointsFileName, char *polygonFileName, char *outputFileName) {
+    FILE *pointsFile = NULL, *polygonFile = NULL, *outputFile = NULL;
+    pointsFile = safeFileOpen(&pointsFile, pointsFileName, "r");
+    polygonFile = safeFileOpen(&polygonFile, polygonFileName, "r");
+    outputFile = safeFileOpen(&outputFile, outputFileName, "w");
+
+    
+
+    fclose(pointsFile);
+    fclose(polygonFile);
+    fclose(outputFile);
+}
+
+void stage3(char *dataFileName, char *polygonFileName, char *outputFileName) {
+    FILE *dataFile = NULL, *polygonFile = NULL, *outputFile = NULL;
+    dataFile = safeFileOpen(&dataFile, dataFileName, "r");
+    polygonFile = safeFileOpen(&polygonFile, polygonFileName, "r");
+    outputFile = safeFileOpen(&outputFile, outputFileName, "w");
+
+
+
+    fclose(dataFile);
+    fclose(polygonFile);
+    fclose(outputFile);
+}
+
+void stage4(char *dataFileName, char *polygonFileName, char *outputFileName) {
+    FILE *dataFile = NULL, *polygonFile = NULL, *outputFile = NULL;
+    dataFile = safeFileOpen(&dataFile, dataFileName, "r");
+    polygonFile = safeFileOpen(&polygonFile, polygonFileName, "r");
+    outputFile = safeFileOpen(&outputFile, outputFileName, "w");
+
+
+    
+    fclose(dataFile);
+    fclose(polygonFile);
+    fclose(outputFile);
+}

voronoi.h

@@ -1,25 +1,34 @@
-#ifndef STDIO_HEADER
-
-#define STDIO_HEADER
-#include <stdio.h>
-
-#endif
-
-#ifndef STDLIB_HEADER
-
-#define STDLIB_HEADER
-#include <stdlib.h>
-
+#ifndef DCEL_HEADER
+#include "dcel.h"
 #endif
 
 #ifndef VORONOI_HEADER
-
 #define VORONOI_HEADER
 
 typedef struct tower tower_t;
 
-tower_t** readTowers(tower_t **towers, FILE* datasetFile, int *numTowers);
-void readCurrentLine(char* lineBuffer, tower_t* tower);
+/* Reads the CSV file and stores the information in the towers array */
+tower_t **readTowers(tower_t **towers, FILE *datasetFile, int *numTowers);
+
+/* Reads the current row from the CSV into a new tower */
+void readCurrentTower(char *lineBuffer, tower_t *tower);
+
+/* Takes a line from the CSV and converts the data into a tower_t format */
 void freeTowers(tower_t **towers, int numTowers);
 
+/* Reads a points file and stores the information in the points array */
+vertex_t **readPoints(vertex_t **points, FILE *pointsFile, int *numPoints);
+
+/* Outputs the bisector equations from pointsFile into outputFile */
+void stage1(char *pointsFileName, char *outputFileName);
+
+/* Outputs the intersections the bisectors make with the polygon */
+void stage2(char *pointsFileName, char *polygonFileName, char *outputFileName);
+
+/* Constructs a Voronoi diagram and prints the resulting diameters */
+void stage3(char *dataFileName, char *polygonFileName, char *outputFileName);
+
+/* Same as stage3, but prints diameters in ascending order */
+void stage4(char *dataFileName, char *polygonFileName, char *outputFileName);
+
 #endif