int HDF_CreateFile(char* fileName)
{
FILE* fp;
if((fopen(fileName, "rb"))!= NULL)
{
BF_errno = BFE_FILEEXISTS ;
return BF_errno;
}
fp = fopen(fileName, "wb+");
if( fp == NULL)
{
BF_errno = BFE_CANNOTCREATEFILE;
return BF_errno;
}
else
{
if(HDF_CloseFile(fp) !=BFE_OK)
return BF_errno;
return BFE_OK;
}
}
/* error code, else return BFE_OK. */
int FMM_Close(int fileDesc)
{
int RetVal;
if ( FMM_IsValid(fileDesc) == FALSE ){ /* check validy of fileDesc */
BF_Errno=BFE_FD;
return BFE_FD;
}
file_headers[file_openings[fileDesc].header].openings--; /* decrease counter of file openings reffering to current header */
if ( file_headers[file_openings[fileDesc].header].openings == 0 /* if no file opening reffers to current header and header has */
&& file_headers[file_openings[fileDesc].header].dirty == 1 ) /* been changed, write it back to file. */
if ( (RetVal=HDF_WriteBlock(0, file_headers[file_openings[fileDesc].header].header, file_openings[fileDesc].fp)) != BFE_OK )
return RetVal;
file_openings[fileDesc].empty=1; /* set current position as empty */
if ( (RetVal=HDF_CloseFile(file_openings[fileDesc].fp)) != BFE_OK ) /* closing, using file pointer */
return RetVal;
return BFE_OK;
}
//an yparxei to arxeio epistrefei true, alliws false
BOOLEAN HDF_ExistsFile(char* fileName)
{
FILE* fp;
fp = fopen(fileName, "rb");
if(fp != NULL)
{
if(HDF_CloseFile(fp)!= BFE_OK)
return FALSE;
return TRUE;
}
else if( fp == NULL)
return FALSE;
}
/* Create a file with name: fileName
* using services provided from lower
* Levels. Check all errors that may
* occur and return respective error
* code, else return BFE_OK.
*/
int BF_CreateFile(char *fileName)
{
int RetVal;
char header[BF_BLOCK_SIZE];
FILE* fp;
if ( HDF_ExistsFile(fileName) == TRUE ){ /* check if file exists */
BF_Errno=BFE_FILEEXISTS;
return BFE_FILEEXISTS;
}
if ( (RetVal=HDF_CreateFile(fileName)) != BFE_OK ) /* if not, create it */
return RetVal;
bzero(header,BF_BLOCK_SIZE);
if ( (RetVal=HDF_OpenFile(fileName,&fp)) != BFE_OK ) /* open it */
return RetVal;
if ( (RetVal=HDF_WriteBlock(0,header,fp)) != BFE_OK ) /* write empty header */
return RetVal;
if ( (RetVal=HDF_CloseFile(fp)) != BFE_OK ) /* close it */
return RetVal;
return BFE_OK;
}
int main(void) {
int rvalue;
FILE *fp1, *fp2;
char *buffer, *bufStart;
int fd11, fd12, fd13;
int fd21, fd22, fd23;
int i,j, randNum, randFd;
fileInfo_t finfo;
// ---------------------- Dimiourgia twn fileName1 kai fileName2 ----------------------
// ---------------------- Dimiourgia tou fileName1 ----------------------
printf("\n--------------\n");
printf("CREATING FILES\n");
printf("--------------\n\n");
// Elegxos an yparxei to fileName1
printf("Checking if file %s exists...\n\n", fileName1);
if (HDF_ExistsFile(fileName1) == TRUE) {
printf("Checkpoint 1:\n");
printf("HDF_ExistsFile returned TRUE!\n\n");
}
// Dimiourgia tou arxeiou fileName1
printf("Creating file %s...\n\n", fileName1);
if ( (rvalue = HDF_CreateFile(fileName1)) != BFE_OK) {
printf("Checkpoint 2:\n");
printf("HDF_CreateFile() returned %d!\n\n", rvalue);
}
// Anoigma tou arxeiou fileName1
printf("Opening file %s...\n\n", fileName1);
if ((rvalue = HDF_OpenFile(fileName1, &fp1)) != BFE_OK)
{
printf("Checkpoint 3:\n");
printf("HDF_OpenFile() returned %d, should have returned 0!\n\n",rvalue);
}
// Dimiourgia epikefalidas tou arxeiou sti mnimi
buffer = malloc(sizeof(char) * BF_BLOCK_SIZE);
bufStart = buffer;
memset(buffer, 0, BF_BLOCK_SIZE);
// Antigrafi epikefalidas sto block 0 tou arxeiou
printf("Writing file header to disk...\n\n");
if ((rvalue = HDF_WriteBlock(0, buffer, fp1)) != BFE_OK)
{
printf("Checkpoint 4:");
printf("HDF_WriteBlock() returned %d!\n\n",rvalue);
}
// Kleisimo tou arxeiou fileName1
printf("Closing file %s\n\n", fileName1);
if ((rvalue = HDF_CloseFile(fp1)) != BFE_OK)
{
printf("Checkpoint 5:\n");
printf("HDF_CloseFile() returned %d!\n\n", rvalue);
}
// ---------------------- Dimiourgia tou fileName2 ----------------------
// Elegxos an yparxei to fileName2
printf("Checking if file %s exists...\n\n", fileName2);
if (HDF_ExistsFile(fileName2) == TRUE) {
printf("Checkpoint 6:\n");
printf("HDF_ExistsFile returned TRUE!\n\n");
}
// Dimiourgia tou arxeiou fileName2
printf("Creating file %s...\n\n", fileName2);
if ( (rvalue=HDF_CreateFile(fileName2)) != BFE_OK) {
printf("Checkpoint 7:\n");
printf("HDF_CreateFile() returned %d!\n\n", rvalue);
}
// Anoigma tou arxeiou fileName2
printf("Opening file %s...\n\n", fileName2);
if ((rvalue = HDF_OpenFile(fileName2, &fp2)) != BFE_OK)
{
printf("Checkpoint 8:\n");
printf("HDF_OpenFile() returned %d, should have returned 0!\n\n",rvalue);
}
// Antigrafi epikefalidas sto block 0 tou arxeiou
printf("Writing file header to disk...\n\n");
if ((rvalue = HDF_WriteBlock(0, buffer, fp2)) != BFE_OK)
{
printf("Checkpoint 9:");
printf("HDF_WriteBlock() returned %d!\n\n",rvalue);
}
// Kleisimo tou arxeiou fileName2
printf("Closing file %s\n\n", fileName2);
if ((rvalue = HDF_CloseFile(fp2)) != BFE_OK)
{
printf("Checkpoint 10:\n");
printf("HDF_CloseFile() returned %d!\n\n", rvalue);
}
// ---------------------- FMM epipedo ----------------------
printf("------------------------------------\n");
printf("OPENING AND PROCESSING FILES\n");
printf("------------------------------------\n\n");
FMM_Init();
BMM_Init();
// 1o anoigma tou fileName1
printf("Opening file %s (1)...\n\n", fileName1);
if ((fd11 = FMM_Open(fileName1)) < 0) {
printf("Checkpoint 11:\n");
printf("FMM_Open() returned %d!\n\n", fd11);
}
// 2o anoigma tou fileName1
printf("Opening file %s (2)...\n\n", fileName1);
if ((fd12 = FMM_Open(fileName1)) < 0) {
printf("Checkpoint 12:\n");
printf("FMM_Open() returned %d!\n\n", fd12);
}
// 3o anoigma tou fileName1
printf("Opening file %s (3)...\n\n", fileName1);
if ((fd13 = FMM_Open(fileName1)) < 0) {
printf("Checkpoint 13:\n");
printf("FMM_Open() returned %d!\n\n", fd12);
}
// 1o anoigma tou fileName2
printf("Opening file %s (1)...\n\n", fileName2);
if ((fd21 = FMM_Open(fileName2)) < 0) {
printf("Checkpoint 14:\n");
printf("FMM_Open() returned %d!\n\n", fd21);
}
// 2o anoigma tou fileName2
printf("Opening file %s (2)...\n\n", fileName2);
if ((fd22 = FMM_Open(fileName2)) < 0) {
printf("Checkpoint 15:\n");
printf("FMM_Open() returned %d!\n\n", fd21);
}
// 3o anoigma tou fileName2
printf("Opening file %s (3)...\n\n", fileName2);
if ((fd23 = FMM_Open(fileName2)) < 0) {
printf("Checkpoint 16:\n");
printf("FMM_Open() returned %d!\n\n", fd21);
}
// Ftiakse BLOCKS blocks gia kathe ena apo ta files
for (i=0;i<BLOCKS;i++){
randNum = rand()%3;
if (randNum==1)
randFd = fd13;
else if (randNum==2)
randFd = fd11;
else
randFd = fd12;
finfo.fd = randFd;
if ((rvalue = FMM_GetFileInfoByFD(&finfo)) < 0) {
printf("Checkpoint 17:\n");
printf("FMM_GetFileInfoByFD() returned %d!\n\n", rvalue);
}
if ((rvalue = BMM_AllocBlock(finfo,i,&buffer)) < 0) {
printf("Checkpoint 18:\n");
printf("BMM_AllocBlock() returned %d!\n\n", rvalue);
}
if ((rvalue = FMM_HEAD_Set(fd11, i, TRUE)) < 0) {
printf("Checkpoint 19:\n");
printf("FMM_HEAD_Set() returned %d!\n\n", rvalue);
}
// Tropopoiisi tou block pou "efere" i BMM_AllocBlock
j=(300-i)*(300-i);
memcpy(buffer,&j,sizeof(int));
if ((rvalue = BMM_UnpinBlock(finfo,i,TRUE)) < 0) {
printf("Checkpoint 20:\n");
printf("BMM_UnpinBlock() returned %d!\n\n", rvalue);
}
randNum = rand()%3;
if (randNum==1)
randFd = fd22;
else if (randNum==2)
randFd = fd21;
else
randFd = fd23;
finfo.fd = randFd;
if ((rvalue = FMM_GetFileInfoByFD(&finfo)) < 0) {
printf("Checkpoint 21:\n");
printf("FMM_GetFileInfoByFD() returned %d!\n\n", rvalue);
}
if ((rvalue = BMM_AllocBlock(finfo,i,&buffer)) < 0) {
printf("Checkpoint 22:\n");
printf("BMM_AllocBlock() returned %d!\n\n", rvalue);
}
if ((rvalue = FMM_HEAD_Set(fd21, i, TRUE)) < 0) {
printf("Checkpoint 23:\n");
printf("FMM_HEAD_Set() returned %d!\n\n", rvalue);
}
// Tropopoiisi tou block pou "efere" i BMM_AllocBlock
memcpy(buffer,&i,sizeof(int));
if ((rvalue = BMM_UnpinBlock(finfo,i,TRUE)) < 0) {
printf("Checkpoint 24:\n");
printf("BMM_UnpinBlock() returned %d!\n\n", rvalue);
}
}
finfo.fd = fd11;
if ((rvalue = FMM_GetFileInfoByFD(&finfo)) < 0) {
printf("Checkpoint 25:\n");
printf("FMM_GetFileInfoByFD() returned %d!\n\n", rvalue);
}
if ((rvalue = BMM_Flush(finfo)) < 0) {
printf("Checkpoint 26:\n");
printf("BMM_Flush() returned %d!\n\n", rvalue);
}
finfo.fd = fd21;
if ((rvalue = FMM_GetFileInfoByFD(&finfo)) < 0) {
printf("Checkpoint 27:\n");
printf("FMM_GetFileInfoByFD() returned %d!\n\n", rvalue);
}
if ((rvalue = BMM_Flush(finfo)) < 0) {
printf("Checkpoint 28:\n");
printf("BMM_Flush() returned %d!\n\n", rvalue);
}
printf("-------------\n");
printf("CLOSING FILES\n");
printf("-------------\n\n");
// Kleisimo 1ou anoigmatos tou fileName1
printf("Closing file %s (1)...\n\n", fileName1);
if ((rvalue = FMM_Close(fd11)) != BFE_OK) {
printf("Checkpoint 29:\n");
printf("FMM_Close() returned %d!\n\n", rvalue);
}
// Kleisimo 2ou anoigmatos tou fileName1
printf("Closing file %s (2)...\n\n", fileName1);
if ((rvalue = FMM_Close(fd12)) != BFE_OK) {
printf("Checkpoint 31:\n");
printf("FMM_Close() returned %d!\n\n", rvalue);
}
// Kleisimo 3ou anoigmatos tou fileName1
printf("Closing file %s (3)...\n\n", fileName1);
if ((rvalue = FMM_Close(fd13)) != BFE_OK) {
printf("Checkpoint 31:\n");
printf("FMM_Close() returned %d!\n\n", rvalue);
}
// Kleisimo 1ou anoigmatos tou fileName2
printf("Closing file %s (1)...\n\n", fileName2);
if ((rvalue = FMM_Close(fd21)) != BFE_OK) {
printf("Checkpoint 32:\n");
printf("FMM_Close() returned %d!\n\n", rvalue);
}
// Kleisimo 2ou anoigmatos tou fileName2
printf("Closing file %s (2)...\n\n", fileName2);
if ((rvalue = FMM_Close(fd22)) != BFE_OK) {
printf("Checkpoint 33:\n");
printf("FMM_Close() returned %d!\n\n", rvalue);
}
// Kleisimo 3ou anoigmatos tou fileName2
printf("Closing file %s (3)...\n\n", fileName2);
if ((rvalue = FMM_Close(fd23)) != BFE_OK) {
printf("Checkpoint 34:\n");
printf("FMM_Close() returned %d!\n\n", rvalue);
}
free(bufStart);
return 0;
}
int main(void) {
int rvalue;
FILE *fp;
char *buffer;
int fd;
fileInfo_t finfo;
char athlete[ATHLETE_SIZE];
int offset;
int blockNumInFile1;
int blockNumInHeader1;
int blockNumInFile2;
int blockNumInHeader2;
int firstValid;
int secondValid;
// ---------------------- HDF epipedo ----------------------
// Elegxos an yparxei to fileName
printf("\nChecking if file %s exists...\n\n", fileName);
if (HDF_ExistsFile(fileName) == TRUE) {
printf("Checkpoint 1:\n");
printf("HDF_ExistsFile returned TRUE!\n\n");
}
// Dimiourgia tou arxeiou fileName
printf("Creating file %s...\n\n", fileName);
if ( (rvalue=HDF_CreateFile(fileName)) != BFE_OK) {
printf("Checkpoint 2:\n");
printf("HDF_CreateFile() returned %d!\n\n", rvalue);
}
// Anoigma tou arxeiou fileName
printf("Opening file %s...\n\n", fileName);
if ((rvalue = HDF_OpenFile(fileName,&fp)) != BFE_OK)
{
printf("Checkpoint 3:\n");
printf("HDF_OpenFile() returned %d, should have returned 0!\n\n",rvalue);
}
// Dimiourgia epikefalidas tou arxeiou sti mnimi
buffer = malloc(sizeof(char) * BF_BLOCK_SIZE);
memset(buffer, 0, BF_BLOCK_SIZE);
// Antigrafi epikefalidas sto block 0 tou arxeiou
printf("Writing file header to disk...\n\n");
if ((rvalue = HDF_WriteBlock(0, buffer, fp)) != BFE_OK)
{
printf("Checkpoint 4:");
printf("HDF_WriteBlock() returned %d!\n\n",rvalue);
}
// Kleisimo tou arxeiou fileName
printf("Closing file %s\n\n", fileName);
if ((rvalue = HDF_CloseFile(fp)) != BFE_OK)
{
printf("Checkpoint 5:\n");
printf("HDF_CloseFile() returned %d!\n\n", rvalue);
}
// ---------------------- FMM epipedo ----------------------
FMM_Init();
// Anoigma tou arxeiou
printf("Opening file %s...\n\n", fileName);
if ((fd = FMM_Open(fileName)) < 0) {
printf("Checkpoint 6:\n");
printf("FMM_Open() returned %d!\n\n", fd);
}
// Elegxos an i thesi fd tou pinaka anoixtwn arxeiwn einai pleon egkyri kataxwrisi arxeiou
printf("Checking for validity of position %d of open files array...\n\n", fd);
if (FMM_IsValid(fd) != TRUE) {
printf("Checkpoint 7:\n");
printf("FMM_IsValid() returned FALSE!\n\n");
}
// Anaktisi pliroforias gia to arxeio me vasi to onoma
strcpy(finfo.filename, fileName);
printf("Retrieving file information by name...\n\n");
if ((rvalue = FMM_GetFileInfoByName(&finfo)) != BFE_OK) {
printf("Checkpoint 8:\n");
printf("FMM_GetFileInfoByName() returned %d!\n\n", rvalue);
}
printFileInfo(&finfo);
// Anaktisi pliroforias gia to arxeio me vasi to fd
finfo.fd = fd;
printf("Retrieving file information by file descriptor...\n\n");
if ((rvalue = FMM_GetFileInfoByFD(&finfo)) != BFE_OK) {
printf("Checkpoint 9:\n");
printf("FMM_GetFileInfoByFD() returned %d!\n\n", rvalue);
}
printFileInfo(&finfo);
// Dimiourgia enos neou block sti mnimi
memset(buffer, 0, BF_BLOCK_SIZE);
offset = 0;
strcpy(athlete, "Periklis Iakovakis");
memcpy(buffer + offset, athlete, ATHLETE_SIZE);
offset += ATHLETE_SIZE;
strcpy(athlete, "Pyrros Dimas");
memcpy(buffer + offset, athlete, ATHLETE_SIZE);
offset += ATHLETE_SIZE;
strcpy(athlete, "Helena Isinbayeva");
memcpy(buffer + offset, athlete, ATHLETE_SIZE);
offset += ATHLETE_SIZE;
strcpy(athlete, "Blanka Vlasic");
memcpy(buffer + offset, athlete, ATHLETE_SIZE);
// Grapsimo aytou tou block sto arxeio sti thesi blockNumInFile
fp = finfo.fp;
blockNumInFile1 = 5;
printf("Writing block to disk...\n\n");
if ((rvalue = HDF_WriteBlock(blockNumInFile1, buffer, fp)) != BFE_OK)
{
printf("Checkpoint 10:");
printf("HDF_WriteBlock() returned %d!\n\n",rvalue);
}
// Enimerwsi tis epikefalidas tou arxeiou oti to block ayto einai pleon egkyro
blockNumInHeader1 = blockNumInFile1 - 1; // PROSOXH SE AYTO!!!
printf("Updating header...\n\n");
if ((rvalue = FMM_HEAD_Set(fd, blockNumInHeader1, TRUE)) != BFE_OK) {
printf("Checkpoint 11:");
printf("FMM_HEAD_Set() returned %d!\n\n",rvalue);
}
// Elegxos an enimerwthike i epikefalida
printf("Checking header...\n\n");
if (FMM_HEAD_IsValid(fd, blockNumInHeader1) == FALSE) {
printf("Checkpoint 12:");
printf("FMM_HEAD_isValid() returned %d!\n\n",rvalue);
}
// Anaktisi tou prwtou egkyrou block tou arxeiou
printf("Retrieving first valid block...\n\n");
if ((firstValid = FMM_HEAD_GetFirstBlock(fd)) == BFE_EOF) {
printf("Checkpoint 13:");
printf("FMM_HEAD_GetFirstBlock returned %d!\n\n",rvalue);
}
printf("firstValid = %d, it should be equal to %d\n\n", firstValid, blockNumInHeader1);
// Dimiourgia enos 2ou neou block sti mnimi
memset(buffer, 0, BF_BLOCK_SIZE);
offset = 0;
strcpy(athlete, "Vasilis Spanoulis");
memcpy(buffer + offset, athlete, ATHLETE_SIZE);
offset += ATHLETE_SIZE;
strcpy(athlete, "Sofoklis Sxortsianitis");
memcpy(buffer + offset, athlete, ATHLETE_SIZE);
// Grapsimo aytou tou block sto arxeio sti thesi blockNumInFile
blockNumInFile2 = 3;
printf("Writing block to disk...\n\n");
if ((rvalue = HDF_WriteBlock(blockNumInFile2, buffer, fp)) != BFE_OK)
{
printf("Checkpoint 14:");
printf("HDF_WriteBlock() returned %d!\n\n",rvalue);
}
// Enimerwsi tis epikefalidas tou arxeiou oti to block ayto einai pleon egkyro
blockNumInHeader2 = blockNumInFile2 - 1; // PROSOXH SE AYTO!!!
printf("Updating header...\n\n");
if ((rvalue = FMM_HEAD_Set(fd, blockNumInHeader2, TRUE)) != BFE_OK) {
printf("Checkpoint 15:");
printf("FMM_HEAD_Set() returned %d!\n\n",rvalue);
}
// Anaktisi tou prwtou egkyrou block tou arxeiou
printf("Retrieving first valid block...\n\n");
if ((firstValid = FMM_HEAD_GetFirstBlock(fd)) == BFE_EOF) {
printf("Checkpoint 16:");
printf("FMM_HEAD_GetFirstBlock returned %d!\n\n",rvalue);
}
printf("firstValid = %d, it should be equal to %d\n\n", firstValid, blockNumInHeader2);
// Anaktisi tou prwtou egkyrou block tou arxeiou meta apo to firstValid
printf("Retrieving first valid block after block %d...\n\n", firstValid);
if ((secondValid = FMM_HEAD_GetNextBlock(fd, firstValid)) == BFE_EOF) {
printf("Checkpoint 17:");
printf("FMM_HEAD_GetFirstBlock returned %d!\n\n",rvalue);
}
printf("secondValid = %d, it should be equal to %d\n\n", secondValid, blockNumInHeader1);
// Kleisimo arxeiou
printf("Closing file %s...\n\n", fileName);
if ((rvalue = FMM_Close(fd)) != BFE_OK) {
printf("Checkpoint 19:\n");
printf("FMM_Close() returned %d!\n\n", rvalue);
}
free(buffer);
return 0;
}