ramnode.c

/*
 * ramnode.c
 *
 *  Created on: Nov 15, 2016
 *      Author: dinesh
 */

#include <string.h>
#include <libgen.h>

#include "ramnode.h"

void addNode(ramNode *head, ramNode *node) {
	node->next = NULL;

	if (head == NULL) {
		head = node;
	} else {
		ramNode *temp = head;
		while (temp->next != NULL) {
			temp = temp->next;
		}
		temp->next = node;
	}
}

void printLog(int fd, const char *msg) {
	write(fd, msg, strlen(msg));
}

ramNode* searchNode(ramNode *head, const char *name) {
	ramNode *temp = head;
	while (temp != NULL && strcmp(name, temp->name) != 0)
		temp = temp->next;
	if (temp != NULL)
		return temp;
	else
		return NULL;
}

void printNodes(ramNode *head) {
	printf("MKD: Nodes are: ");
	ramNode *temp = head;
	while (temp != NULL) {
		printf(" %s \n", temp->name);
		temp = temp->next;
	}
}

int deleteNode(ramNode *head, const char *path) {
	ramNode *temp = head;
	ramNode *prev = temp;
	ramNode *foundTemp = NULL;
	ramNode *foundPrev = NULL;
	char *tempName;
	while (temp != NULL) {
		tempName = (char *) malloc(temp->size);
		strcpy(tempName, temp->name);

		char *dirName = dirname(tempName);
		// Check whether it has any children, If so, throw an error
		if (strcmp(dirName, path) == 0)
			return -ENOTEMPTY;
		else if(strcmp(temp->name, path) == 0 ) {
			foundTemp = temp;
			foundPrev = prev;
		}
		prev = temp;
		temp = temp->next;
	}
	if(foundTemp == NULL)
		return -ENOENT;
	else {
		foundPrev->next = foundTemp->next;
		return 0;
	}
}

int deleteFile(ramNode *head, const char *path) {
	ramNode *temp = head;
	ramNode *prev = temp;
	ramNode *foundTemp = NULL;
	ramNode *foundPrev = NULL;
	while (temp != NULL) {

		// Check whether it has any children, If so, throw an error
		if(strcmp(temp->name, path) == 0 ) {
			foundTemp = temp;
			foundPrev = prev;
		}
		prev = temp;
		temp = temp->next;
	}
	if(foundTemp == NULL)
		return -ENOENT;
	else {
		foundPrev->next = foundTemp->next;
		return 0;
	}
}