MarSTDv2004: CFile.h Source File

MarSTDv2004

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CFile.h

00001 #ifndef __Cfile_h__
00002 #define __Cfile_h__
00003 
00005 // MarSTD version 2004 - (c)2004 - Marcel Smit                      //
00006 //                                                                  //
00007 // [email protected]                                      //
00008 // [email protected]                                          //
00009 //                                                                  //
00010 // This code may not be used in a commercial product without my     //
00011 // permission. If you redistribute it, this message must remain     //
00012 // intact. If you use this code, some acknowledgement would be      //
00013 // appreciated. ;-)                                                 //
00015 
00017 
00018 
00019 
00020 // NOTE: File closes automatically when leaving scope.
00021 
00022 #include <io.h>
00023 #include <stdarg.h>
00024 #include <stdio.h>
00025 
00027 
00052 class CFile
00053 {
00054 
00055  public:
00056  
00057         CFile()
00058         {
00059                 f = 0;
00060         }
00061         ~CFile()
00062         {
00063                 close();
00064         }
00065   
00066         protected:
00067  
00068         FILE* f;        
00069      
00070         public:
00071  
00078         bool open(char* fn, char* mode)
00079         {
00080                 MASSERT(fn);    
00081                 close();
00082                 f = fopen(fn, mode);
00083                 return opened();
00084         }
00088         void close()
00089         {
00090                 if (opened())
00091                         return;
00092                 fclose(f);
00093                 f = 0;                  
00094         }
00099         bool opened()
00100         {
00101                 return f == 0 ? false : true;
00102         }
00103   
00104         public:
00105  
00112         bool read(void* p, unsigned int size)
00113         {
00114                 MASSERT(p);     
00115                 if (!opened())
00116                         return false;
00117                 return fread(p, 1, size, f) == size;    
00118         }
00125         bool write(void* p, unsigned int size)
00126         {
00127                 MASSERT(p);     
00128                 if (!opened())
00129                         return false;
00130                 return fwrite(p, 1, size, f) == size;   
00131         }
00138         bool printf(char* format, ...)
00139         {
00140                 MASSERT(format);        
00141                 if (!opened())
00142                         return false;
00143                 char text[1024];
00144                 va_list ap;
00145                 va_start(ap, format);
00146                 vsprintf(text, format, ap);
00147                 va_end(ap);
00148                 if (fprintf(f, text) <= 0)
00149                         return false;
00150                 return true;            
00151         }
00156         unsigned long position()
00157         {
00158                 if (!opened())
00159                         return (unsigned long)(-1);
00160                 return ftell(f);                        
00161         }
00167         bool seek(unsigned long position)
00168         {
00169                 if (!opened())
00170                         return false;
00171                 if (fseek(f, position, SEEK_SET))
00172                         return false;
00173                 return true;                    
00174         }
00179         int size()
00180         {
00181                 if (!opened())
00182                         return -1;
00183                 return filelength(fileno(f));                   
00184         }
00185 
00186 };
00187 
00188 //---------------------------------------------------------------------------
00189 
00190 #endif
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