bfileattributes.cpp

これは C++ で書かれたファイル属性の使用例です。

#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <stdint.h>
 
#include "btrieveCpp.h"
 
static char *btrieveFileName = (char *)"squaresAndSquareRoots.btr";
 
static Btrieve::StatusCode
createFile(BtrieveClient *btrieveClient)
{
   Btrieve::StatusCode status;
   BtrieveFileAttributes btrieveFileAttributes;
 
   // If SetBalancedIndexes() fails.
   if ((status = btrieveFileAttributes.SetBalancedIndexes(true)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      printf("Error: BtrieveFileAttributes::SetBalancedIndexes():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   // If SetFileVersion() fails.
   if ((status = btrieveFileAttributes.SetFileVersion(Btrieve::FILE_VERSION_9_5)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      printf("Error: BtrieveFileAttributes::SetFileVersion():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   // If SetFixedRecordLength() fails.
   if ((status = btrieveFileAttributes.SetFixedRecordLength(4)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      printf("Error: BtrieveFileAttributes::SetFixedRecordLength():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   // If SetFreeSpaceThreshold() fails.
   if ((status = btrieveFileAttributes.SetFreeSpaceThreshold(Btrieve::FREE_SPACE_THRESHOLD_10_PERCENT)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      printf("Error: BtrieveFileAttributes::SetFreeSpaceThreshold():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   // If SetPageSize() fails.
   if ((status = btrieveFileAttributes.SetPageSize(Btrieve::PAGE_SIZE_16384, true)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      printf("Error: BtrieveFileAttributes::SetPageSize():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   // If SetPreallocatedPageCount() fails.
   if ((status = btrieveFileAttributes.SetPreallocatedPageCount(64 * 1024 - 1)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      printf("Error: BtrieveFileAttributes::SetPreallocatedPageCount():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   // If SetRecordCompressionMode() fails.
   if ((status = btrieveFileAttributes.SetRecordCompressionMode(Btrieve::RECORD_COMPRESSION_MODE_RUN_LENGTH_ENCODING)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      printf("Error: BtrieveFileAttributes::SetRecordCompressionMode():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   // If SetReservedDuplicatePointerCount() fails.
   if ((status = btrieveFileAttributes.SetReservedDuplicatePointerCount(119)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      printf("Error: BtrieveFileAttributes::SetReservedDuplicatePointerCount():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   // If SetSystemDataMode() fails.
   if ((status = btrieveFileAttributes.SetSystemDataMode(Btrieve::SYSTEM_DATA_MODE_NO)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      printf("Error: BtrieveFileAttributes::SetSystemDataMode():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   // If SetVariableLengthRecordsMode() fails.
   if ((status = btrieveFileAttributes.SetVariableLengthRecordsMode(Btrieve::VARIABLE_LENGTH_RECORDS_MODE_YES_VARIABLE_ALLOCATION_TAILS)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      printf("Error: BtrieveFileAttributes::SetVariableLengthRecordsMode():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   // If FileCreate() fails.
   if ((status = btrieveClient->FileCreate(&btrieveFileAttributes, btrieveFileName, Btrieve::CREATE_MODE_OVERWRITE)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      printf("Error: BtrieveClient::FileCreate():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
leave:
   return status;
}
 
static Btrieve::StatusCode
openFile(BtrieveClient *btrieveClient, BtrieveFile *btrieveFile)
{
   Btrieve::StatusCode status;
 
   // If FileOpen() fails.
   if ((status = btrieveClient->FileOpen(btrieveFile, btrieveFileName, NULL, Btrieve::OPEN_MODE_NORMAL)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      printf("Error: BtrieveClient::FileOpen():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
leave:
   return status;
}
 
static Btrieve::StatusCode
printFileInformation(BtrieveFile *btrieveFile)
{
   Btrieve::FileVersion btrieveFileVersion;
   Btrieve::FreeSpaceThreshold btrieveFreeSpaceThreshold;
   Btrieve::PageSize btrievePageSize;
   Btrieve::RecordCompressionMode btrieveRecordCompressionMode;
   Btrieve::StatusCode status;
   Btrieve::SystemDataMode btrieveSystemDataMode;
   Btrieve::VariableLengthRecordsMode btrieveVariableLengthRecordsMode;
   BtrieveFileInformation btrieveFileInformation;
   int i;
 
   // If GetInformation() fails.
   if ((status = btrieveFile->GetInformation(&btrieveFileInformation)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      printf("Error: BtrieveFile::GetInformation():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   // If GetBalancedIndexes() fails.
   if ((i = btrieveFileInformation.GetBalancedIndexes()) < 0)
   {
      status = btrieveFileInformation.GetLastStatusCode();
      printf("Error: BtrieveFileInformation::GetBalancedIndexes():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   printf("BalancedIndexes = %s\n", i > 0 ? "Yes" : "No");
 
   // If GetFileVersion() fails.
   if ((btrieveFileVersion = btrieveFileInformation.GetFileVersion()) == Btrieve::FILE_VERSION_UNKNOWN)
   {
      status = btrieveFileInformation.GetLastStatusCode();
      printf("Error: BtrieveFileInformation::GetFileVersion():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   printf("FileVersion = %s\n", Btrieve::FileVersionToString(btrieveFileVersion));
 
   // If GetFreeSpaceThreshold() fails.
   if ((btrieveFreeSpaceThreshold = btrieveFileInformation.GetFreeSpaceThreshold()) == Btrieve::FREE_SPACE_THRESHOLD_UNKNOWN)
   {
      status = btrieveFileInformation.GetLastStatusCode();
      printf("Error: BtrieveFileInformation::GetFreeSpaceThreshold():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   printf("FreeSpaceThreshold = %s\n", Btrieve::FreeSpaceThresholdToString(btrieveFreeSpaceThreshold));
 
   // If GetFixedRecordLength() fails.
   if ((i = btrieveFileInformation.GetFixedRecordLength()) < 0)
   {
      status = btrieveFileInformation.GetLastStatusCode();
      printf("Error: BtrieveFileInformation::GetFixedRecordLength():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   printf("FixedRecordLength = %d\n", i);
 
   // If GetPageCompression() fails.
   if ((i = btrieveFileInformation.GetPageCompression()) < 0)
   {
      status = btrieveFileInformation.GetLastStatusCode();
      printf("Error: BtrieveFileInformation::GetPageCompression():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   printf("PageCompression = %s\n", i > 0 ? "Yes" : "No");
 
   // If GetPagePreallocation() fails.
   if ((i = btrieveFileInformation.GetPagePreallocation()) < 0)
   {
      status = btrieveFileInformation.GetLastStatusCode();
      printf("Error: BtrieveFileInformation::GetPagePreallocation():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   printf("PagePreallocation = %s\n", i > 0 ? "Yes" : "No");
 
   // If GetPageSize() fails.
   if ((btrievePageSize = btrieveFileInformation.GetPageSize()) == Btrieve::PAGE_SIZE_UNKNOWN)
   {
      status = btrieveFileInformation.GetLastStatusCode();
      printf("Error: BtrieveFileInformation::GetPageSize():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   printf("PageSize = %s\n", Btrieve::PageSizeToString(btrievePageSize));
 
   // If GetRecordCompressionMode() fails.
   if ((btrieveRecordCompressionMode = btrieveFileInformation.GetRecordCompressionMode()) == Btrieve::RECORD_COMPRESSION_MODE_UNKNOWN)
   {
      status = btrieveFileInformation.GetLastStatusCode();
      printf("Error: BtrieveFileInformation::GetRecordCompressionMode():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   printf("RecordCompressionMode = %s\n", Btrieve::RecordCompressionModeToString(btrieveRecordCompressionMode));
 
   // If GetSystemDataMode() fails.
   if ((btrieveSystemDataMode = btrieveFileInformation.GetSystemDataMode()) == Btrieve::SYSTEM_DATA_MODE_UNKNOWN)
   {
      status = btrieveFileInformation.GetLastStatusCode();
      printf("Error: BtrieveFileInformation::GetSystemDataMode():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   printf("SystemDataMode = %s\n", Btrieve::SystemDataModeToString(btrieveSystemDataMode));
 
   // If GetUnusedDuplicatePointerCount() fails.
   if ((i = btrieveFileInformation.GetUnusedDuplicatePointerCount()) < 0)
   {
      status = btrieveFileInformation.GetLastStatusCode();
      printf("Error: BtrieveFileInformation::GetUnusedDuplicatePointerCount():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   printf("UnusedDuplicatePointerCount = %d\n", i);
 
   // If GetUnusedPageCount() fails.
   if ((i = btrieveFileInformation.GetUnusedPageCount()) < 0)
   {
      status = btrieveFileInformation.GetLastStatusCode();
      printf("Error: BtrieveFileInformation::GetUnusedPageCount():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   printf("UnusedPageCount = %d\n", i);
 
   // If GetVariableLengthRecordsMode() fails.
   if ((btrieveVariableLengthRecordsMode = btrieveFileInformation.GetVariableLengthRecordsMode()) == Btrieve::VARIABLE_LENGTH_RECORDS_MODE_UNKNOWN)
   {
      status = btrieveFileInformation.GetLastStatusCode();
      printf("Error: BtrieveFileInformation::GetVariableLengthRecordsMode():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
   printf("VariableLengthRecordsMode = %s\n", Btrieve::VariableLengthRecordsModeToString(btrieveVariableLengthRecordsMode));
 
leave:
   return status;
}
 
static Btrieve::StatusCode
closeFile(BtrieveClient *btrieveClient, BtrieveFile *btrieveFile)
{
   Btrieve::StatusCode status;
 
   // If FileClose() fails.
   if ((status = btrieveClient->FileClose(btrieveFile)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      printf("Error: BtrieveClient::FileClose():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
leave:
   return status;
}
 
static Btrieve::StatusCode
deleteFile(BtrieveClient *btrieveClient)
{
   Btrieve::StatusCode status;
 
   // If FileDelete() fails.
   if ((status = btrieveClient->FileDelete(btrieveFileName)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      printf("Error: BtrieveClient::FileDelete():%d:%s.\n", status, Btrieve::StatusCodeToString(status));
      goto leave;
   }
 
leave:
   return status;
}
 
int
main(int argc, char *argv[])
{
   static const char *usage = "Usage: %s\n";
 
   BtrieveClient btrieveClient;
   Btrieve::StatusCode status = Btrieve::STATUS_CODE_UNKNOWN;
   BtrieveFile btrieveFile;
 
   // If the incorrect number of arguments were given.
   if (argc != 1)
   {
      printf(usage, argv[0]);
      goto leave;
   }
 
   // If createFile() fails.
   if ((status = createFile(&btrieveClient)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      goto leave;
   }
 
   // If openFile() fails.
   if ((status = openFile(&btrieveClient, &btrieveFile)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      goto leave;
   }
 
   // If printFileInformation() fails.
   if ((status = printFileInformation(&btrieveFile)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      goto leave;
   }
 
   // If closeFile() fails.
   if ((status = closeFile(&btrieveClient, &btrieveFile)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      goto leave;
   }
 
   // If deleteFile() fails.
   if ((status = deleteFile(&btrieveClient)) != Btrieve::STATUS_CODE_NO_ERROR)
   {
      goto leave;
   }
 
leave:
   // If there wasn't a failure.
   if (status == Btrieve::STATUS_CODE_NO_ERROR)
      return 0;
 
   return 1;
}