3 /* _PDCLIB_open( char const * const, int )
5 This file is part of the Public Domain C Library (PDCLib).
6 Permission is granted to use, modify, and / or redistribute at will.
9 /* This is an example implementation of _PDCLIB_open() fit for use with POSIX
16 #include <_PDCLIB_glue.h>
18 #include <sys/types.h>
23 int _PDCLIB_open( char const * const filename, unsigned int mode )
25 /* This is an example implementation of _PDCLIB_open() fit for use with
27 FIXME: The permissions of newly created files should not be hardcoded
31 switch ( mode & ~_PDCLIB_FBIN )
33 case _PDCLIB_FREAD: /* "r" */
36 case _PDCLIB_FWRITE: /* "w" */
37 osmode = O_WRONLY | O_CREAT | O_TRUNC;
39 case _PDCLIB_FAPPEND: /* "a" */
40 osmode = O_WRONLY | O_APPEND | O_CREAT;
42 case _PDCLIB_FREAD | _PDCLIB_FRW: /* "r+" */
45 case _PDCLIB_FWRITE | _PDCLIB_FRW: /* "w+" */
46 osmode = O_RDWR | O_CREAT | O_TRUNC;
48 case _PDCLIB_FAPPEND | _PDCLIB_FRW: /* "a+" */
49 osmode = O_RDWR | O_APPEND | O_CREAT;
51 default: /* Invalid mode */
54 if ( osmode & O_CREAT )
56 return open( filename, osmode, S_IRUSR | S_IWUSR );
60 return open( filename, osmode );
67 #include <_PDCLIB_test.h>
76 /* This testdriver assumes POSIX, i.e. _PDCLIB_fd_t being int and being
77 incremented by one on each successful open.
81 /* Trying to read non-existent file. */
82 TESTCASE( _PDCLIB_open( "testfile", _PDCLIB_FREAD ) == _PDCLIB_NOHANDLE );
83 /* Writing to file, trying to read from it. */
84 TESTCASE( ( fh = _PDCLIB_open( "testfile", _PDCLIB_FWRITE ) ) != _PDCLIB_NOHANDLE );
85 TESTCASE( write( fh, "test", 4 ) == 4 );
86 TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
87 TESTCASE( read( fh, buffer, 4 ) == -1 );
88 TESTCASE( _PDCLIB_close( fh ) == 0 );
89 /* Reading from file, trying to write to it. */
90 TESTCASE( ( fh = _PDCLIB_open( "testfile", _PDCLIB_FREAD ) ) != _PDCLIB_NOHANDLE );
91 TESTCASE( write( fh, "test", 4 ) == -1 );
92 TESTCASE( _PDCLIB_close( fh ) == 0 );
93 /* Appending to file, trying to read from it. */
94 TESTCASE( ( fh = _PDCLIB_open( "testfile", _PDCLIB_FAPPEND ) ) != _PDCLIB_NOHANDLE );
95 TESTCASE( write( fh, "app", 3 ) == 3 );
96 TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
97 TESTCASE( read( fh, buffer, 10 ) == -1 );
98 TESTCASE( write( fh, "end", 3 ) == 3 );
99 TESTCASE( _PDCLIB_close( fh ) == 0 );
100 /* Reading and writing from file ("r+"). */
101 TESTCASE( ( fh = _PDCLIB_open( "testfile", _PDCLIB_FREAD | _PDCLIB_FRW ) ) != _PDCLIB_NOHANDLE );
102 TESTCASE( read( fh, buffer, 10 ) == 10 );
103 TESTCASE( memcmp( buffer, "testappend", 10 ) == 0 );
104 TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
105 TESTCASE( write( fh, "wedo", 4 ) == 4 );
106 TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
107 TESTCASE( read( fh, buffer, 10 ) == 10 );
108 TESTCASE( memcmp( buffer, "wedoappend", 10 ) == 0 );
109 TESTCASE( _PDCLIB_close( fh ) == 0 );
110 /* Writing and reading from file ("w+"). */
111 TESTCASE( ( fh = _PDCLIB_open( "testfile", _PDCLIB_FWRITE | _PDCLIB_FRW ) ) != _PDCLIB_NOHANDLE );
112 TESTCASE( write( fh, "test", 4 ) == 4 );
113 TESTCASE( lseek( fh, 1, SEEK_SET ) == 1 );
114 TESTCASE( read( fh, buffer, 2 ) == 2 );
115 TESTCASE( memcmp( buffer, "es", 2 ) == 0 );
116 TESTCASE( write( fh, "sie", 3 ) == 3 );
117 TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
118 TESTCASE( read( fh, buffer, 6 ) == 6 );
119 TESTCASE( memcmp( buffer, "tessie", 6 ) == 0 );
120 TESTCASE( _PDCLIB_close( fh ) == 0 );
121 /* Appending and reading from file ("a+"). */
122 TESTCASE( ( fh = _PDCLIB_open( "testfile", _PDCLIB_FAPPEND | _PDCLIB_FRW ) ) != _PDCLIB_NOHANDLE );
123 TESTCASE( write( fh, "baby", 4 ) == 4 );
124 TESTCASE( lseek( fh, 0, SEEK_SET ) == 0 );
125 TESTCASE( read( fh, buffer, 10 ) == 10 );
126 TESTCASE( memcmp( buffer, "tessiebaby", 10 ) == 0 );
127 TESTCASE( _PDCLIB_close( fh ) == 0 );
129 system( "rm testfile" );