//==========================================================================
//
//      fileio1.c
//
//      Test fileio system
//
//==========================================================================
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// for more details.                                                        
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//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):           nickg
// Contributors:        nickg
// Date:                2000-05-25
// Purpose:             Test fileio system
// Description:         This test uses the testfs to check out the initialization
//                      and basic operation of the fileio system
//                      
//                      
//                      
//                      
//                      
//              
//
//####DESCRIPTIONEND####
//
//==========================================================================

#include <pkgconf/hal.h>
#include <pkgconf/io_fileio.h>

#include <cyg/infra/cyg_trac.h>        // tracing macros
#include <cyg/infra/cyg_ass.h>         // assertion macros

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <errno.h>
#include <string.h>

#include <cyg/infra/testcase.h>
#include <cyg/infra/diag.h>            // HAL polled output

//==========================================================================
// Include the test filesystem.
// If we could make tests out of multiple files, then we could just link
// against the object file for this rather than including it.

#include "testfs.c"

//==========================================================================

#define SHOW_RESULT( _fn, _res ) \
diag_printf("<INFO>: " #_fn "() returned %ld %s\n", (long)_res, _res<0?strerror(errno):"");

//==========================================================================

#define IOSIZE  100

//==========================================================================

static void listdir( char *name, int statp )
{
    int err;
    DIR *dirp;
    
    diag_printf("<INFO>: reading directory %s\n",name);
    
    dirp = opendir( name );
    if( dirp == NULL ) SHOW_RESULT( opendir, -1 );

    for(;;)
    {
        struct dirent *entry = readdir( dirp );
        
        if( entry == NULL )
            break;

        diag_printf("<INFO>: entry %14s",entry->d_name);
        if( statp )
        {
            char fullname[PATH_MAX];
            struct stat sbuf;

            if( name[0] )
            {
                strcpy(fullname, name );
                if( !(name[0] == '/' && name[1] == 0 ) )
                    strcat(fullname, "/" );
            }
            else fullname[0] = 0;
            
            strcat(fullname, entry->d_name );
            
            err = stat( fullname, &sbuf );
            if( err < 0 )
            {
                if( errno == ENOSYS )
                    diag_printf(" <no status available>");
                else SHOW_RESULT( stat, err );
            }
            else
            {
                diag_printf(" [mode %08x nlink %d size %ld]",
                            sbuf.st_mode,sbuf.st_nlink,sbuf.st_size);
            }
        }

        diag_printf("\n");
    }

    err = closedir( dirp );
    if( err < 0 ) SHOW_RESULT( stat, err );
}

//==========================================================================

static void createfile( char *name, size_t size )
{
    char buf[IOSIZE];
    int fd;
    ssize_t wrote;
    int i;
    int err;

    diag_printf("<INFO>: create file %s size %zd\n",name,size);

    err = access( name, F_OK );
    if( err < 0 && errno != EACCES ) SHOW_RESULT( access, err );
    
    for( i = 0; i < IOSIZE; i++ ) buf[i] = i%256;
 
    fd = open( name, O_WRONLY|O_CREAT );
    if( fd < 0 ) SHOW_RESULT( open, fd );

    while( size > 0 )
    {
        ssize_t len = size;
        if ( len > IOSIZE ) len = IOSIZE;
        
        wrote = write( fd, buf, len );
        if( wrote != len ) SHOW_RESULT( write, wrote );        

        size -= wrote;
    }

    err = close( fd );
    if( err < 0 ) SHOW_RESULT( close, err );
}

//==========================================================================

static void maxfile( char *name )
{
    char buf[IOSIZE];
    int fd;
    ssize_t wrote;
    int i;
    int err;
    size_t size = 0;
    
    diag_printf("<INFO>: create maximal file %s\n",name);

    err = access( name, F_OK );
    if( err < 0 && errno != EACCES ) SHOW_RESULT( access, err );
    
    for( i = 0; i < IOSIZE; i++ ) buf[i] = i%256;
 
    fd = open( name, O_WRONLY|O_CREAT );
    if( fd < 0 ) SHOW_RESULT( open, fd );

    do
    {
        wrote = write( fd, buf, IOSIZE );
        if( wrote < 0 ) SHOW_RESULT( write, wrote );        

        size += wrote;
        
    } while( wrote == IOSIZE );

    diag_printf("<INFO>: file size == %zd\n",size);

    err = close( fd );
    if( err < 0 ) SHOW_RESULT( close, err );
}

//==========================================================================

static void checkfile( char *name )
{
    char buf[IOSIZE];
    int fd;
    ssize_t done;
    int i;
    int err;

    diag_printf("<INFO>: check file %s\n",name);
    
    err = access( name, F_OK );
    if( err != 0 ) SHOW_RESULT( access, err );

    fd = open( name, O_RDONLY );
    if( fd < 0 ) SHOW_RESULT( open, fd );

    for(;;)
    {
        done = read( fd, buf, IOSIZE );
        if( done < 0 ) SHOW_RESULT( read, done );

        if( done == 0 ) break;

        for( i = 0; i < done; i++ )
            if( buf[i] != i%256 )
            {
                diag_printf("buf[%d](%02x) != %02x\n",i,buf[i],i%256);
                CYG_TEST_FAIL("Data read not equal to data written\n");
            }
    }

    err = close( fd );
    if( err < 0 ) SHOW_RESULT( close, err );
}

//==========================================================================

static void copyfile( char *name2, char *name1 )
{

    int err;
    char buf[IOSIZE];
    int fd1, fd2;
    ssize_t done, wrote;

    diag_printf("<INFO>: copy file %s -> %s\n",name2,name1);

    err = access( name1, F_OK );
    if( err < 0 && errno != EACCES ) SHOW_RESULT( access, err );

    err = access( name2, F_OK );
    if( err != 0 ) SHOW_RESULT( access, err );
    
    fd1 = open( name1, O_WRONLY|O_CREAT );
    if( fd1 < 0 ) SHOW_RESULT( open, fd1 );

    fd2 = open( name2, O_RDONLY );
    if( fd2 < 0 ) SHOW_RESULT( open, fd2 );
    
    for(;;)
    {
        done = read( fd2, buf, IOSIZE );
        if( done < 0 ) SHOW_RESULT( read, done );

        if( done == 0 ) break;

        wrote = write( fd1, buf, done );
        if( wrote != done ) SHOW_RESULT( write, wrote );

        if( wrote != done ) break;
    }

    err = close( fd1 );
    if( err < 0 ) SHOW_RESULT( close, err );

    err = close( fd2 );
    if( err < 0 ) SHOW_RESULT( close, err );
    
}

//==========================================================================

static void comparefiles( char *name2, char *name1 )
{
    int err;
    char buf1[IOSIZE];
    char buf2[IOSIZE];
    int fd1, fd2;
    ssize_t done1, done2;
    int i;

    diag_printf("<INFO>: compare files %s == %s\n",name2,name1);

    err = access( name1, F_OK );
    if( err != 0 ) SHOW_RESULT( access, err );

    err = access( name1, F_OK );
    if( err != 0 ) SHOW_RESULT( access, err );
    
    fd1 = open( name1, O_RDONLY );
    if( fd1 < 0 ) SHOW_RESULT( open, fd1 );

    fd2 = open( name2, O_RDONLY );
    if( fd2 < 0 ) SHOW_RESULT( open, fd2 );
    
    for(;;)
    {
        done1 = read( fd1, buf1, IOSIZE );
        if( done1 < 0 ) SHOW_RESULT( read, done1 );

        done2 = read( fd2, buf2, IOSIZE );
        if( done2 < 0 ) SHOW_RESULT( read, done2 );

        if( done1 != done2 )
            diag_printf("Files different sizes\n");
        
        if( done1 == 0 ) break;

        for( i = 0; i < done1; i++ )
            if( buf1[i] != buf2[i] )
            {
                diag_printf("buf1[%d](%02x) != buf1[%d](%02x)\n",i,buf1[i],i,buf2[i]);
                CYG_TEST_FAIL("Data in files not equal\n");
            }
    }

    err = close( fd1 );
    if( err < 0 ) SHOW_RESULT( close, err );

    err = close( fd2 );
    if( err < 0 ) SHOW_RESULT( close, err );
    
}

//==========================================================================
// main

int cyg_user_start(void)
{
    int err;

    CYG_TEST_INIT();

    // --------------------------------------------------------------

    createfile( "/foo", 202 );
    checkfile( "foo" );
    copyfile( "foo", "fee");
    checkfile( "fee" );
    comparefiles( "foo", "/fee" );
    
    err = mkdir( "/bar", 0 );
    if( err < 0 ) SHOW_RESULT( mkdir, err );

    listdir( "/" , false);

    copyfile( "fee", "/bar/fum" );
    checkfile( "bar/fum" );
    comparefiles( "/fee", "bar/fum" );

    
    err = chdir( "bar" );
    if( err < 0 ) SHOW_RESULT( chdir, err );
    
    err = rename( "/foo", "bundy" );
    if( err < 0 ) SHOW_RESULT( rename, err );

    listdir( "/", true );
    listdir( "" , true );

    checkfile( "/bar/bundy" );
    comparefiles("/fee", "bundy" );

    testfs_dump();
    
    // --------------------------------------------------------------
    
    err = unlink( "/fee" );
    if( err < 0 ) SHOW_RESULT( unlink, err );

    err = unlink( "fum" );
    if( err < 0 ) SHOW_RESULT( unlink, err );

    err = unlink( "/bar/bundy" );
    if( err < 0 ) SHOW_RESULT( unlink, err );

    err = chdir( "/" );
    if( err < 0 ) SHOW_RESULT( chdir, err );
    
    err = rmdir( "/bar" );
    if( err < 0 ) SHOW_RESULT( rmdir, err );

    listdir( "/", false );

    // --------------------------------------------------------------

    err = mount( "", "/ram", "testfs" );
    if( err < 0 ) SHOW_RESULT( mount, err );    

    createfile( "/ram/tinky", 456 );
    copyfile( "/ram/tinky", "/ram/laalaa" );
    checkfile( "/ram/tinky");
    checkfile( "/ram/laalaa");
    comparefiles( "/ram/tinky", "/ram/laalaa" );
    comparefiles( "/ram/tinky", "ram/laalaa" );
    comparefiles( "ram/tinky", "/ram/laalaa" );

    err = chdir( "/ram" );
    if( err < 0 ) SHOW_RESULT( chdir, err );

    createfile( "tinky", 678 );
    checkfile( "tinky" );

    maxfile( "dipsy" );
    checkfile( "dipsy" );
    copyfile( "dipsy", "po" );
    checkfile( "po" );
    comparefiles( "dipsy", "po" );

    testfs_dump();
    
    // --------------------------------------------------------------
    
    err = unlink( "tinky" );
    if( err < 0 ) SHOW_RESULT( unlink, err );

    err = unlink( "dipsy" );
    if( err < 0 ) SHOW_RESULT( unlink, err );

    err = unlink( "po" );
    if( err < 0 ) SHOW_RESULT( unlink, err );
    
    err = unlink( "laalaa" );
    if( err < 0 ) SHOW_RESULT( unlink, err );
    
    err = chdir( "/" );
    if( err < 0 ) SHOW_RESULT( chdir, err );

    err = umount( "/ram" );
    if( err < 0 ) SHOW_RESULT( umount, err );    
    
    CYG_TEST_PASS_FINISH("fileio1");
}

// -------------------------------------------------------------------------
// EOF fileio1.c
