/* Destroys the index fileName.indexNo */
AM_DestroyIndex(char* fileName,int indexNo)
{
char indexfName[AM_MAX_FNAME_LENGTH];
int errVal;
sprintf(indexfName,"%s.%d",fileName,indexNo);
errVal = PF_DestroyFile(indexfName);
AM_Check;
return(AME_OK);
}
main() {
int error;
int i;
int pagenum,*buf;
int *buf1,*buf2;
int fd1,fd2;
/* create a few files */
if ((error=PF_CreateFile(FILE1))!= PFE_OK){
PF_PrintError("file1");
exit(1);
}
printf("file1 created\n");
if ((error=PF_CreateFile(FILE2))!= PFE_OK){
PF_PrintError("file2");
exit(1);
}
printf("file2 created\n");
/* write to file1 */
writefile(FILE1);
/* print it out */
readfile(FILE1);
/* write to file2 */
writefile(FILE2);
/* print it out */
readfile(FILE2);
/* open both files */
if ((fd1=PF_OpenFile(FILE1))<0){
PF_PrintError("open file1\n");
exit(1);
}
printf("opened file1\n");
if ((fd2=PF_OpenFile(FILE2))<0 ){
PF_PrintError("open file2\n");
exit(1);
}
printf("opened file2\n");
/* get rid of records 1, 3, 5, etc from file 1,
and 0,2,4,6 from file2 */
for (i=0; i < PF_MAX_BUFS; i++){
if (i & 1){
if ((error=PF_DisposePage(fd1,i))!= PFE_OK){
PF_PrintError("dispose\n");
exit(1);
}
printf("disposed %d of file1\n",i);
}
else {
if ((error=PF_DisposePage(fd2,i))!= PFE_OK){
PF_PrintError("dispose\n");
exit(1);
}
printf("disposed %d of file2\n",i);
}
}
if ((error=PF_CloseFile(fd1))!= PFE_OK){
PF_PrintError("close fd1");
exit(1);
}
printf("closed file1\n");
if ((error=PF_CloseFile(fd2))!= PFE_OK){
PF_PrintError("close fd2");
exit(1);
}
printf("closed file2\n");
/* print the files */
readfile(FILE1);
readfile(FILE2);
/* destroy the two files */
if ((error=PF_DestroyFile(FILE1))!= PFE_OK){
PF_PrintError("destroy file1");
exit(1);
}
if ((error=PF_DestroyFile(FILE2))!= PFE_OK){
PF_PrintError("destroy file2");
exit(1);
}
/* create them again */
if ((fd1=PF_CreateFile(FILE1))< 0){
PF_PrintError("create file1");
exit(1);
}
printf("file1 created\n");
if ((fd2=PF_CreateFile(FILE2))< 0){
PF_PrintError("create file2");
exit(1);
}
printf("file2 created\n");
/* put stuff into the two files */
writefile(FILE1);
writefile(FILE2);
/* Open the files, and see how the buffer manager
handles more insertions, and deletions */
/* open both files */
if ((fd1=PF_OpenFile(FILE1))<0){
PF_PrintError("open file1\n");
exit(1);
}
printf("opened file1\n");
if ((fd2=PF_OpenFile(FILE2))<0 ){
PF_PrintError("open file2\n");
exit(1);
}
printf("opened file2\n");
for (i=PF_MAX_BUFS; i < PF_MAX_BUFS*2 ; i++){
if ((error=PF_AllocPage(fd2,&pagenum,&buf))!= PFE_OK){
PF_PrintError("first buffer\n");
exit(1);
}
*((int *)buf) = i;
if ((error=PF_UnfixPage(fd2,pagenum,TRUE))!= PFE_OK){
PF_PrintError("unfix file1");
exit(1);
}
printf("alloc %d file1\n",i,pagenum);
if ((error=PF_AllocPage(fd1,&pagenum,&buf))!= PFE_OK){
PF_PrintError("first buffer\n");
exit(1);
}
*((int *)buf) = i;
if ((error=PF_UnfixPage(fd1,pagenum,TRUE))!= PFE_OK){
PF_PrintError("dispose file1");
exit(1);
}
printf("alloc %d file2\n",i,pagenum);
}
for (i= PF_MAX_BUFS; i < PF_MAX_BUFS*2; i++){
if (i & 1){
if ((error=PF_DisposePage(fd1,i))!= PFE_OK){
PF_PrintError("dispose fd1");
exit(1);
}
printf("dispose fd1 page %d\n",i);
}
else {
if ((error=PF_DisposePage(fd2,i))!= PFE_OK){
PF_PrintError("dispose fd2");
exit(1);
}
printf("dispose fd2 page %d\n",i);
}
}
printf("getting file2\n");
for (i=PF_MAX_BUFS; i < PF_MAX_BUFS*2; i++){
if (i & 1){
if ((error=PF_GetThisPage(fd2,i,&buf))!=PFE_OK){
PF_PrintError("get this on fd2");
exit(1);
}
printf("%d %d\n",i,*buf);
if ((error=PF_UnfixPage(fd2,i,FALSE))!= PFE_OK){
PF_PrintError("get this on fd2");
exit(1);
}
}
}
printf("getting file1\n");
for (i=PF_MAX_BUFS; i < PF_MAX_BUFS*2; i++){
if (!(i & 1)){
if ((error=PF_GetThisPage(fd1,i,&buf))!=PFE_OK){
PF_PrintError("get this on fd2");
exit(1);
}
printf("%d %d\n",i,*buf);
if ((error=PF_UnfixPage(fd1,i,FALSE))!= PFE_OK){
PF_PrintError("get this on fd2");
exit(1);
}
}
}
/* print the files */
printfile(fd2);
printfile(fd1);
/*put some more stuff into file1 */
printf("putting stuff into holes in fd1\n");
for (i=0; i < (PF_MAX_BUFS/2 -1); i++){
if (PF_AllocPage(fd1,&pagenum,&buf)!= PFE_OK){
PF_PrintError("PF_AllocPage");
exit(1);
}
*buf =pagenum;
if (PF_UnfixPage(fd1,pagenum,TRUE)!= PFE_OK){
PF_PrintError("PF_UnfixPage");
exit(1);
}
}
printf("printing fd1");
printfile(fd1);
PF_CloseFile(fd1);
printf("closed file1\n");
PF_CloseFile(fd2);
printf("closed file2\n");
/* open file1 twice */
if ((fd1=PF_OpenFile(FILE1))<0){
PF_PrintError("open file1");
exit(1);
}
printf("opened file1\n");
/* try to destroy it while it's still open*/
error=PF_DestroyFile(FILE1);
PF_PrintError("destroy file1, should not succeed");
/* get rid of some invalid page */
error=PF_DisposePage(fd1,100);
PF_PrintError("dispose page 100, should fail");
/* get a valid page, and try to dispose it without unfixing.*/
if ((error=PF_GetThisPage(fd1,1,&buf))!=PFE_OK){
PF_PrintError("get this on fd2");
exit(1);
}
printf("got page%d\n",*buf);
error=PF_DisposePage(fd1,1);
PF_PrintError("dispose page1, should fail");
/* Now unfix it */
if ((error=PF_UnfixPage(fd1,1,FALSE))!= PFE_OK){
PF_PrintError("get this on fd2");
exit(1);
}
error=PF_UnfixPage(fd1,1,FALSE);
PF_PrintError("unfix fd1 again, should fail");
if ((fd2=PF_OpenFile(FILE1))<0 ){
PF_PrintError("open file1 again");
exit(1);
}
printf("opened file1 again\n");
printfile(fd1);
printfile(fd2);
if (PF_CloseFile(fd1) != PFE_OK){
PF_PrintError("close fd1");
exit(1);
}
if (PF_CloseFile(fd2)!= PFE_OK){
PF_PrintError("close fd2");
exit(1);
}
/* print the buffer */
printf("buffer:\n");
PFbufPrint();
/* print the hash table */
printf("hash table:\n");
PFhashPrint();
}