Work on buffer

//

#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;

}

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#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