Work on buffer

buffer.c

@@ -3,3 +3,50 @@
 //
 
 #include "buffer.h"
+#include "string.h"
+
+void initBuffer(GrowthBuffer *arr, size_t initSize) {
+    arr->array = (char *) malloc(sizeof(char) * initSize);
+    arr->total_size = initSize;
+    arr->used = 0;
+}
+
+void appendBuffer(GrowthBuffer *arr, char *value, int length) {
+    int dLength = length + 1;
+    if (!hasSpaceBuffer(arr, dLength)) {
+        int growthFactor = arr->total_size;
+        if (growthFactor < dLength) {
+            growthFactor = dLength;
+        }
+
+        int arrNewSize = growthFactor * 2;
+
+        char *newArr = realloc(arr->array, dLength * sizeof(char));
+        arr->array = newArr;
+        arr->total_size = arrNewSize;
+    }
+    int buffPos;
+    int copiedBytesCount;
+    for (int i = 0; i < length; i++) {
+        if (value[i] == NULL) {
+            break;
+        }
+        buffPos = arr->used + i;
+        *(arr->array + buffPos) = value[i];
+        copiedBytesCount++;
+    }
+    arr->used += copiedBytesCount;
+}
+
+void freeBuffer(GrowthBuffer *arr) {
+    free(arr->array);
+    arr->array = NULL;
+    arr->used = arr->total_size = 0;
+}
+
+
+int hasSpaceBuffer(GrowthBuffer *arr, int length) {
+    size_t unused = arr->total_size - arr->used;
+
+    return length <= unused;
+}
\ No newline at end of file

buffer.h

@@ -5,4 +5,18 @@
 #ifndef COMS352_PROJECT2_PART1_BUFFER_H
 #define COMS352_PROJECT2_PART1_BUFFER_H
 
+#include "stdlib.h"
+
+typedef struct {
+    char *array;
+    size_t used;
+    size_t total_size;
+} GrowthBuffer;
+
+void initBuffer(GrowthBuffer *arr, size_t initSize);
+void appendBuffer(GrowthBuffer *arr, char *value, int length);
+void freeBuffer(GrowthBuffer *arr);
+int  hasSpaceBuffer(GrowthBuffer *arr, int length);
+
+
 #endif //COMS352_PROJECT2_PART1_BUFFER_H