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Subversion Repositories openrisc_2011-10-31

[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [tests/] [psxtests/] [psxfile01/] [test_cat.c] - Blame information for rev 173

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Line No. Rev Author Line
1 30 unneback
/*
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 *  A test support function which performs a crude version of
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 *  "cat" so you can look at specific parts of a file.
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 *
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 *  $Id: test_cat.c,v 1.2 2001-09-27 12:02:25 chris Exp $
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 */
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <ctype.h>
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#include <assert.h>
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/*
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 *  test_cat routine
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 */
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unsigned char test_cat_buffer[ 1024 ];
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void test_cat(
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  char *file,
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  int   offset_arg,
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  int   length
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)
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{
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  int            fd;
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  int            status;
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  int            is_printable = 0;
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  int            my_length;
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  int            i;
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  unsigned char  c;
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  int            count = 0;
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  off_t          offset = (off_t)offset_arg;
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  my_length = (length) ? length : sizeof( test_cat_buffer );
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  assert( my_length <= sizeof( test_cat_buffer ) );
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  fd = open( file, O_RDONLY );
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  if ( fd == -1 ) {
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    printf( "test_cat: open( %s ) failed : %s\n", file, strerror( errno ) );
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    exit( 0 );
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  }
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  for ( ;; ) {
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    status = lseek( fd, offset, SEEK_SET );
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    assert( status != -1 );
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    status = read( fd, test_cat_buffer, sizeof(test_cat_buffer) );
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    if ( status <= 0 ) {
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      if (!is_printable)
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        printf( "(%d)", count );
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      puts( "" );
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      break;
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    }
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    for ( i=0 ; i<status ; i++ ) {
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      c = test_cat_buffer[i];
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      if (isprint(c) || isspace(c)) {
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        if (!is_printable) {
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          printf( "(%d)", count );
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          count = 0;
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          is_printable = 1;
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        }
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        putchar(c);
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      } else {
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        is_printable = 0;
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        count++;
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      }
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    }
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    offset += status;
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  }
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  status = close( fd );
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  assert( !status );
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}

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