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BDATOS/BDATOS.HH
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BDATOS/BDATOS.HH
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/**************************************************************************\
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| Clase para el tratamiento de Bases de Datos |
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| Jos<6F> David Guill<6C>n 1996 (c) |
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\**************************************************************************/
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#if !defined(__BDatos_HH)
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#define __BDatos_HH
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#include <stdio.h>
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#define OK 0
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#define ERROR 1
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#define NO_ENC -1
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#define ARRIBA 1
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#define ABAJO 0
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#if !defined(__BDatos_CPP)
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#ifdef __cplusplus
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extern "C" {
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#endif
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#endif
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typedef struct
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{
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char ProgName[15]; // Estos datos se comprueban al abrir la base
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char VerHi, VerLow; // para saber si es la adecuada para su progr.
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char Other[200];
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} YourHeader;
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typedef struct
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{
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char NBD[13];
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char Eof_Code;
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char VerHi, VerLow;
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YourHeader MyHeader;
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long NRegistros;
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long NRegTotal;
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long SizeReg;
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} Header;
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class BDatos {
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public:
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char lError;
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char cError[80];
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YourHeader MyHeader;
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void ObtenError(int code); // Obtiene el error "code"
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long Registros(void); // N<> de registros
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long NRegTotal(void); // N<> de registros
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long RegActual(void); // Reg. Actual
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BDatos(); // Constructor de Clase
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~BDatos(); // Destructor de Clase
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int AbrirReg( char *file, long sizereg ); // Abre el Fichero
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void SalvaDatosUsuario( void * Datos ); // Salva los 256 bytes de usuario
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// Carga los datos de usuario
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void CargaDatosUsuario( void * Datos, unsigned char size );
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void CerrarReg( void ); // Cierra el Fich.
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int EscribeReg( void *dato, long pos ); // Escribe un Dato
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int LeeReg( void *dato, long pos ); // Lee un Dato
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int InsReg( void *dato, long pos, char ab ); // Inserta un Reg en pos.
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int DelReg( long pos ); // Borra un Reg de pos.
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int ShortReg(void); // Corta el fich. y lo hace mas peque<75>o
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// Ordena la Base
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int SortReg( int (*fcmp)(const void *, const void *) );
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// Busca un registro en una base ordenada
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int BuscReg( long PosIni, int (*fcmp)(const void *, const void *) );
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private:
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// Funcion auxiliar de ordenaci<63>n
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int SortRegi( int (*fcmp)(const void *, const void *), long izquierda, long derecha );
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FILE *handle_BDatos; // Handle a la Base
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Header BDatosHeader;
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long NRegActual;
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char filename[80];
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char rError;
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void *A, *B;
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};
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#if !defined(__BDatos_CPP)
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#ifdef __cplusplus
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}
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#endif
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#endif
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#endif
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/*
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1 2 3 4 5 6 7 8 9 0
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<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ
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<20> 2 <20> 3 <20> 6 <20> 9 <20> 1 <20> 4 <20> 5 <20> <20> <20> <20> <20> <20> <20>
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INS (2_3)
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(si existen archivos borrados: " (TotalRecords+1) mark * " coge su posicion )
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1 2 3 4 5 6 7 8 9 0
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<20> 2 <20> 3 <20> X2<58> 6 <20> 9 <20> 1 <20> 4 <20> 5 <20>*X2<58> <20> <20> <20> <20>
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(si no existen archivos borrados: coge la posicion de Records + 1 )
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1 2 3 4 5 6 7 8 9 0
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<20> 2 <20> 3 <20> 6 <20> 7 <20> 1 <20> 4 <20> 5 <20> <20> <20> <20> <20> <20> <20>
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<20><><EFBFBD>^<5E><><EFBFBD>^<5E><><EFBFBD>^<5E><><EFBFBD>^<5E><><EFBFBD>^
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<20><>records = 7<><37><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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<20><><EFBFBD>
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<20> 2 <20> 3 <20>7+1<> 6 <20> 7 <20> 1 <20> 4 <20> 5 <20> <20> <20> <20> <20> <20>
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<20><><EFBFBD>
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DEL (3)
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1 2 3 4 5 6 7 8 9 0
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<20> Reg Mark *
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*/
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