1 /* _PDCLIB_filemode( const char * )
3 This file is part of the Public Domain C Library (PDCLib).
4 Permission is granted to use, modify, and / or redistribute at will.
9 /* Helper function that parses the C-style mode string passed to fopen() into
10 the PDCLib flags FREAD, FWRITE, FAPPEND, FRW (read-write) and FBIN (binary
13 unsigned int _PDCLIB_filemode( char const * const mode )
25 rc |= _PDCLIB_FAPPEND | _PDCLIB_FWRITE;
28 /* Other than read, write, or append - invalid */
31 for ( size_t i = 1; i < 4; ++i )
36 if ( rc & _PDCLIB_FRW ) return 0; /* Duplicates are invalid */
40 if ( rc & _PDCLIB_FBIN ) return 0; /* Duplicates are invalid */
47 /* Other than read/write or binary - invalid. */
51 /* Longer than three chars - invalid. */
56 #include "_PDCLIB_test.h"
60 TESTCASE( _PDCLIB_filemode( "r" ) == _PDCLIB_FREAD );
61 TESTCASE( _PDCLIB_filemode( "w" ) == _PDCLIB_FWRITE );
62 TESTCASE( _PDCLIB_filemode( "a" ) == ( _PDCLIB_FAPPEND | _PDCLIB_FWRITE ) );
63 TESTCASE( _PDCLIB_filemode( "r+" ) == ( _PDCLIB_FREAD | _PDCLIB_FRW ) );
64 TESTCASE( _PDCLIB_filemode( "w+" ) == ( _PDCLIB_FWRITE | _PDCLIB_FRW ) );
65 TESTCASE( _PDCLIB_filemode( "a+" ) == ( _PDCLIB_FAPPEND | _PDCLIB_FWRITE | _PDCLIB_FRW ) );
66 TESTCASE( _PDCLIB_filemode( "rb" ) == ( _PDCLIB_FREAD | _PDCLIB_FBIN ) );
67 TESTCASE( _PDCLIB_filemode( "wb" ) == ( _PDCLIB_FWRITE | _PDCLIB_FBIN ) );
68 TESTCASE( _PDCLIB_filemode( "ab" ) == ( _PDCLIB_FAPPEND | _PDCLIB_FWRITE | _PDCLIB_FBIN ) );
69 TESTCASE( _PDCLIB_filemode( "r+b" ) == ( _PDCLIB_FREAD | _PDCLIB_FRW | _PDCLIB_FBIN ) );
70 TESTCASE( _PDCLIB_filemode( "w+b" ) == ( _PDCLIB_FWRITE | _PDCLIB_FRW | _PDCLIB_FBIN ) );
71 TESTCASE( _PDCLIB_filemode( "a+b" ) == ( _PDCLIB_FAPPEND | _PDCLIB_FWRITE | _PDCLIB_FRW | _PDCLIB_FBIN ) );
72 TESTCASE( _PDCLIB_filemode( "rb+" ) == ( _PDCLIB_FREAD | _PDCLIB_FRW | _PDCLIB_FBIN ) );
73 TESTCASE( _PDCLIB_filemode( "wb+" ) == ( _PDCLIB_FWRITE | _PDCLIB_FRW | _PDCLIB_FBIN ) );
74 TESTCASE( _PDCLIB_filemode( "ab+" ) == ( _PDCLIB_FAPPEND | _PDCLIB_FWRITE | _PDCLIB_FRW | _PDCLIB_FBIN ) );
75 TESTCASE( _PDCLIB_filemode( "x" ) == 0 );
76 TESTCASE( _PDCLIB_filemode( "r++" ) == 0 );
77 TESTCASE( _PDCLIB_filemode( "wbb" ) == 0 );
78 TESTCASE( _PDCLIB_filemode( "a+bx" ) == 0 );