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//===========================================================================
//
//      fclose.cxx
//
//      Implementation of C library file close function as per ANSI 7.9.5.1
//
//===========================================================================
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// -------------------------------------------                              
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//
// As a special exception, if other files instantiate templates or use      
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// General Public License v2.                                               
//
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// ####ECOSGPLCOPYRIGHTEND####                                              
//===========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):     jlarmour
// Contributors:  
// Date:          2000-04-20
// Purpose:       Implements ISO C fclose() function
// Description: 
// Usage:       
//
//####DESCRIPTIONEND####
//
//===========================================================================
 
// CONFIGURATION
 
#include <pkgconf/libc_stdio.h>   // Configuration header
#include <pkgconf/infra.h>
 
// INCLUDES
 
#include <cyg/infra/cyg_type.h>     // Common project-wide type definitions
#include <stddef.h>                 // NULL and size_t from compiler
#include <errno.h>                  // Error codes
#include <stdio.h>                  // header for fclose()
#include <stdlib.h>                 // free()
#include <cyg/libc/stdio/stdiofiles.hxx>  // C library files
#include <cyg/libc/stdio/stream.hxx>      // C library streams
 
#include <cyg/libc/stdio/io.inl>     // I/O system inlines
 
// FUNCTIONS
 
 
externC int
fclose( FILE *stream ) __THROW
{
    Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stream;
    int i;
    Cyg_ErrNo err;
 
    if (NULL == real_stream)
    {
        errno = EBADF;
        return EOF;
    }
 
    Cyg_libc_stdio_files::lock();
 
    // find the stream in the table
    for (i=0; i < FOPEN_MAX; i++)
    {
        if (real_stream == Cyg_libc_stdio_files::get_file_stream(i))
            break;
    } // for
 
    if (i == FOPEN_MAX) // didn't find it
    {
        Cyg_libc_stdio_files::unlock();
        errno = EBADF;
        return EOF;
    } // if
 
    err = real_stream->close();
 
    if( err != ENOERR )
    {
        Cyg_libc_stdio_files::unlock();
        errno = err;
        return EOF;
    }
 
    // Explicitly call destructor - this flushes the output too
    real_stream->~Cyg_StdioStream();
 
    // and free it
    free(real_stream);
 
    // and mark the stream available for use
    Cyg_libc_stdio_files::set_file_stream(i, NULL);
 
    Cyg_libc_stdio_files::unlock();
 
    return 0;
 
} // fclose()
 
// EOF fclose.cxx