HDD_FappendOpen.c

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#include <stdio.h>
#include "libFireBird.h"
 
TYPE_File *HDD_FappendOpen(const char *FileName)
{
  TRACEENTER();
 
  TYPE_File            *file;
  char                  buffer[512];
  dword                 pos, blks, i;
  char                 *end;
  char                  TAPPath[FBLIB_DIR_SIZE], Name[FBLIB_DIR_SIZE];
 
  if(!FileName || !*FileName)
  {
    TRACEEXIT();
    return NULL;
  }
 
  ConvertPathType(FileName, TAPPath, PF_TAPPathOnly);
  ConvertPathType(FileName, Name, PF_FileNameOnly);
 
  HDD_TAP_PushDir();
  if(*TAPPath) HDD_ChangeDir(TAPPath);
 
  if(!TAP_Hdd_Exist(Name)) TAP_Hdd_Create(Name, ATTR_NORMAL);
 
  if((file = TAP_Hdd_Fopen(Name)))
  {
    if(TAP_Hdd_Fseek(file, 0, SEEK_SET) != 0)
    {
      TAP_Hdd_Fclose(file);
      file = NULL;
    }
    else
    {
      pos = 0;
 
      do
      {
        memset(buffer, 0, sizeof(buffer));
        blks = TAP_Hdd_Fread(&buffer, sizeof(buffer), 1, file);
 
        for(i = 0, end = buffer; i < sizeof(buffer); i++)
          if(buffer[i] == '\0')
          {
            end = buffer + i;
            break;
          }
 
        if(i < sizeof(buffer)) break;
        else pos += sizeof(buffer);
      }
      while(blks == 1);
 
      pos += end - buffer;
 
      if(TAP_Hdd_Fseek(file, pos, SEEK_SET) != pos)
      {
        TAP_Hdd_Fclose(file);
        file = NULL;
      }
    }
  }
 
  HDD_TAP_PopDir();
 
  TRACEEXIT();
  return file;
}