void UDB_open(UDB *self)
{
self->committedFile = fopen(self->committedPath, "r+");
if (!self->committedFile)
{
self->committedFile = fopen(self->committedPath, "w");
fclose(self->committedFile);
self->committedFile = fopen(self->committedPath, "r+");
}
if (UDB_readCommitted(self) == 0)
{
JFile_clipLog(self->index->file);
JFile_clipLog(self->records->file);
}
UDBIndex_open(self->index);
UDBRecords_open(self->records);
self->isOpen = 1;
}
void JFile_writeLogToFile(JFile *self)
{
size_t writeCount = 0;
int logNotEmpty = 0;
int lastTerminator = 0;
fseek(self->log, 0, SEEK_SET);
while (1)
{
long pos;
size_t total;
if (fread(&pos, sizeof(long), 1, self->log) != 1)
{
if (feof(self->log)) break;
printf("JFile: error reading pos\n");
goto fatalError;
}
if (fread(&total, sizeof(size_t), 1, self->log) != 1)
{
printf("JFile: error reading total\n");
goto fatalError;
}
self->buf = realloc(self->buf, total);
if (fread(self->buf, total, 1, self->log) != 1)
{
printf("JFile: error reading buf\n");
goto fatalError;
}
lastTerminator = fgetc(self->log);
if (lastTerminator != JFILE_END_TRANSACTION_ITEM &&
lastTerminator != JFILE_END_TRANSACTION)
{
printf("JFile: invalid log terminator\n");
goto fatalError;
}
fseek(self->file, pos, SEEK_SET);
fwrite(self->buf, total, 1, self->file);
writeCount ++;
logNotEmpty = 1;
}
if (logNotEmpty)
{
//printf("writing log\n");
JFile_syncFileWritesToDisk(self);
JFile_clipLog(self);
}
return;
fatalError:
printf("JFile: FATAL ERROR: invalid log file '%s' - may result in inconsistency\n", self->logPath);
}
