radix sort pog

Makefile

@@ -18,10 +18,12 @@ INCLUDE_INSTALL_PATH := /usr/local/include/lsort
 LIB_INSTALL_PATH := /usr/local/lib
 
 STATIC_BUILD_FILES := $(STATIC_BUILD_DIR)/lsort.o \
-					  $(STATIC_BUILD_DIR)/types.o
+					  $(STATIC_BUILD_DIR)/types.o \
+					  $(STATIC_BUILD_DIR)/radix.o
 
 DYNAMIC_BUILD_FILES := $(DYNAMIC_BUILD_DIR)/lsort.o \
-					   $(STATIC_BUILD_DIR)/types.o
+					   $(STATIC_BUILD_DIR)/types.o \
+					   $(STATIC_BUILD_DIR)/radix.o
 
 TEST_BUILD_FILES := $(TEST_BUILD_DIR)/test.o \
 

include/lsort.h

@@ -1,6 +1,8 @@
 #ifndef LSORT_H
 #define LSORT_H
 
+#include "types.h"
 
+int check_sorted(lsort_array_i* array);
 
 #endif

include/radix.h

@@ -0,0 +1,8 @@
+#ifndef LSORT_RADIX_H
+#define LSORT_RADIX_H
+
+#include "types.h"
+
+int lsort_radix(lsort_array_i* array, lsort_array_i* return_array);
+
+#endif

include/types.h

@@ -15,20 +15,24 @@ typedef struct {
     int* items;
 } lsort_array_i;
 
-lsort_array_i* lsort_create_int_array();
+
+lsort_array_i* lsort_array_i_create();
+void lsort_array_i_destroy(lsort_array_i* array);
+
 void lsort_array_i_append(lsort_array_i* array, int number);
 int lsort_array_i_swap(lsort_array_i* array, int indexA, int indexB);
 
+void lsort_array_i_print(lsort_array_i* array);
+
+
 typedef struct {
     size_t count;
     size_t capacity;
     lsort_array_i** items;
 } lsort_array_i_array;
 
-// struct lsort_int_link {
+void lsort_array_i_array_append(lsort_array_i_array* array, lsort_array_i* item);
-//     int value;
+void lsort_array_i_array_destroy(lsort_array_i_array* array);
-//     lsort_array_i* next;
-// };
 
 
 #endif

lsort.c

@@ -1,5 +1,12 @@
 #include "./include/lsort.h"
 
-int add(int x, int y) {
+int check_sorted(lsort_array_i* array) {
-    return x + y;
+    if (array->count <= 0) return 2;
+    for (int i = 0; i < array->count - 1; i++) {
+        if (array->items[i] > array->items[i + 1]) {
+            return 1;
+        };
+    }
+
+    return 0;
 }

radix.c

@@ -0,0 +1,79 @@
+#include "include/types.h"
+#include "include/radix.h"
+
+int _seperate_pos_neg(lsort_array_i* array, lsort_array_i* pos_array, lsort_array_i* neg_array) {
+    for (int i = 0; i < array->count; i++) {
+        if ((0x80000000 & array->items[i]) == 0x80000000) {
+            lsort_array_i_append(neg_array, array->items[i]);
+        } else {
+            lsort_array_i_append(pos_array, array->items[i]);
+        }
+    }
+    return 0;
+}
+
+int _sort_items(lsort_array_i* numbers, lsort_array_i_array* buckets) {
+    int byte_check = 0x0000000F;
+
+    for (int i = 0; i < 8; i++) {
+        // Loop through the list of numbers and append them to their respective buckets for this 4-byte chunk
+        for (int item_index = 0; item_index < numbers->count; item_index++) {
+            int* current_number = &numbers->items[item_index];
+            lsort_array_i* bucket = buckets->items[(*current_number >> (i * 4)) & byte_check];
+
+            lsort_array_i_append(bucket, *current_number);
+        }
+        
+        numbers->count = 0;
+        
+        // Add the bucketed numbers back to the original array after emptying it
+        for (int bucket_number = 0; bucket_number < buckets->count; bucket_number++) {
+            lsort_array_i* bucket = buckets->items[bucket_number];
+
+            for (int bucket_item = 0; bucket_item < bucket->count; bucket_item++) {
+                lsort_array_i_append(numbers, bucket->items[bucket_item]);
+            }
+
+            bucket->count = 0;
+        }
+
+        // Repeat for each 4-byte chunk...
+    }
+
+    return 0;
+}
+
+int lsort_radix(lsort_array_i* array, lsort_array_i* return_array) {
+    if (array->count <= 0) return 1;
+
+    // Seperate positive and negative numbers
+    lsort_array_i positive_numbers = {0};
+    lsort_array_i negative_numbers = {0};
+    
+    if (_seperate_pos_neg(array, &positive_numbers, &negative_numbers)) return 2;
+
+    // Create buckets
+    lsort_array_i_array buckets = {0};
+    for (int i = 0; i < 16; i++) {
+        lsort_array_i* bucket = lsort_array_i_create();
+        lsort_array_i_array_append(&buckets, bucket);
+    }
+
+    // Sort each set of numbers using those buckets
+    _sort_items(&negative_numbers, &buckets);
+    _sort_items(&positive_numbers, &buckets);
+    
+    // Add each array of numbers to the return array
+    for (int i = 0; i < negative_numbers.count; i++) {
+        lsort_array_i_append(return_array, negative_numbers.items[i]);
+    }
+
+    for (int i = 0; i < positive_numbers.count; i++) {
+        lsort_array_i_append(return_array, positive_numbers.items[i]);
+    }
+
+    // Destroy the buckets
+    lsort_array_i_array_destroy(&buckets);
+
+    return 0;
+}

types.c

@@ -1,5 +1,14 @@
 #include "include/types.h"
 #include <stdlib.h>
+#include <stdio.h>
+
+lsort_array_i* lsort_array_i_create() {
+    return calloc(1, sizeof(lsort_array_i));
+}
+
+void lsort_array_i_destroy(lsort_array_i* array) {
+    free(array);
+}
 
 void lsort_array_i_append(lsort_array_i* array, int item) {
     if (array->count >= array->capacity) {
@@ -19,3 +28,26 @@ int lsort_array_i_swap(lsort_array_i* array, int indexA, int indexB) {
 
     return 0;
 }
+
+void lsort_array_i_print(lsort_array_i* array) {
+    for (int i = 0; i < array->count; i++) {
+        printf("%d ", array->items[i]);
+    }
+    printf("\n");
+}
+
+void lsort_array_i_array_append(lsort_array_i_array* array, lsort_array_i* item) {
+    if (array->count >= array->capacity) {
+        if (array->capacity == 0) array->capacity = 8;
+        else array->capacity *= 2;
+
+        array->items = realloc(array->items, array->capacity * sizeof(*array->items));
+    }
+    array->items[array->count++] = item;
+}
+
+void lsort_array_i_array_destroy(lsort_array_i_array* array) {
+    for (int array_number = 0; array_number < array->count; array_number++) {
+        lsort_array_i_destroy(array->items[array_number]);
+    }
+}