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ram.c
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ram.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char *ram[1000];
int getNextAvailableCell() ;
int getLastAvailableCell( int start ) ;
void addToRam(FILE *p, int *start, int *end)
{
*start = getNextAvailableCell() ;
if ( *start == -1 )
{
return;
}
*end = getLastAvailableCell( *start ) ;
if ( *end == -1 )
{
return;
}
char line[1000] ;
fgets( line , 999 , p ) ;
int i = *start ;
while( !feof( p ) )
{
if ( i > *end )
{
clearRam() ;
*end = -1 ;
fclose( p ) ;
return ;
}
ram[i] = strdup( line ) ;
fgets( line , 999 , p ) ;
i++ ;
}
*end = i - 1 ;
fclose( p ) ;
}
void removeFromRam( int start , int end)
{
for( int i = start ; i <= end ; i++ )
{
ram[i] = NULL;
}
}
void clearRam()
{
for ( int i = 0 ; i < 1000 ; i++ )
{
if ( ram[i] != NULL )
{ free( ram[i] ) ; }
ram[i] = NULL;
}
}
int getLastAvailableCell( int start )
{
for( int i = start ; i < 1000 ; i++ )
{
if( ram[i] != NULL )
{
return i - 1 ;
} else if ( ram[i] == NULL && i == 999 )
{
return i;
}
}
return -1;
}
int getNextAvailableCell()
{
for( int i = 0 ; i < 1000 ; i++ )
{
if( ram[i] == NULL )
{
return i;
}
}
return -1;
}