diff options
Diffstat (limited to 'c/src/tests/psxtests/psxfile01/test_cat.c')
-rw-r--r-- | c/src/tests/psxtests/psxfile01/test_cat.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/c/src/tests/psxtests/psxfile01/test_cat.c b/c/src/tests/psxtests/psxfile01/test_cat.c new file mode 100644 index 0000000000..f6daecfad7 --- /dev/null +++ b/c/src/tests/psxtests/psxfile01/test_cat.c @@ -0,0 +1,81 @@ +/* + * A test support function which performs a crude version of + * "cat" so you can look at specific parts of a file. + * + * $Id$ + */ + +#include <stdio.h> + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <unistd.h> +#include <errno.h> +#include <string.h> +#include <ctype.h> + +#include <assert.h> + +/* + * test_cat routine + */ + +unsigned char test_cat_buffer[ 1024 ]; + +void test_cat( + char *file, + int offset_arg, + int length +) +{ + int fd; + int status; + int is_printable = 0; + int my_length; + int i; + unsigned char c; + int count = 0; + off_t offset = (off_t)offset_arg; + + my_length = (length) ? length : sizeof( test_cat_buffer ); + assert( my_length <= sizeof( test_cat_buffer ) ); + + fd = open( file, O_RDONLY ); + if ( fd == -1 ) { + printf( "test_cat: open( %s ) failed : %s\n", file, strerror( errno ) ); + exit( 0 ); + } + + for ( ;; ) { + status = lseek( fd, offset, SEEK_SET ); + assert( status != -1 ); + + status = read( fd, test_cat_buffer, sizeof(test_cat_buffer) ); + if ( status <= 0 ) { + if (!is_printable) + printf( "(%d)", count ); + puts( "" ); + break; + } + + for ( i=0 ; i<status ; i++ ) { + c = test_cat_buffer[i]; + if (isprint(c) || isspace(c)) { + if (!is_printable) { + printf( "(%d)", count ); + count = 0; + is_printable = 1; + } + putchar(c); + } else { + is_printable = 0; + count++; + } + } + offset += status; + } + + status = close( fd ); + assert( !status ); +} |