X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdio%2Ffopen.c;h=d181cc1f876ded1362cc297e8c2fad923e67ae64;hb=566bfcc6924abd9fccbd97fa8207711e899dd0bc;hp=f11094416066ed91a9f6bb6d358b4dcebea981c9;hpb=9ee0e8c5b5df0b114218e28753e6c0291cb356a3;p=pdclib

diff --git a/functions/stdio/fopen.c b/functions/stdio/fopen.c
index f110944..d181cc1 100644
--- a/functions/stdio/fopen.c
+++ b/functions/stdio/fopen.c
@@ -12,76 +12,37 @@
 #ifndef REGTEST
 #include <_PDCLIB_glue.h>
 
-static FILE * _PDCLIB_filelist = NULL;
+/* FIXME: This approach is a possible attack vector. */
+struct _PDCLIB_file_t * _PDCLIB_filelist = NULL;
 
-/* Helper function that parses the C-style mode string passed to fopen() into
-   the PDCLib flags.FREAD, FWRITE, FAPPEND, FRW (read-write) and FBIN (
-   mode).
-*/
-static unsigned int filemode( char const * const mode )
-{
-    int rc = 0;
-    switch ( mode[0] )
-    {
-        case 'r':
-            rc |= _PDCLIB_FREAD;
-            break;
-        case 'w':
-            rc |= _PDCLIB_FWRITE;
-            break;
-        case 'a':
-            rc |= _PDCLIB_FAPPEND;
-            break;
-        default:
-            /* Other than read, write, or append - invalid */
-            return 0;
-    }
-    for ( size_t i = 1; i < 4; ++i )
-    {
-        switch ( mode[1] )
-        {
-            case '+':
-                if ( rc & _PDCLIB_FRW ) return 0; /* Duplicates are invalid */
-                rc |= _PDCLIB_FRW;
-                break;
-            case 'b':
-                if ( rc & _PDCLIB_FBIN ) return 0; /* Duplicates are invalid */
-                rc |= _PDCLIB_FBIN;
-                break;
-            case '\0':
-                /* End of mode */
-                return rc;
-            default:
-                /* Other than read/write or binary - invalid. */
-                return 0;
-        }
-    }
-    /* Longer than three chars - invalid. */
-    return 0;
-}
-
-FILE * fopen( const char * _PDCLIB_restrict filename, const char * _PDCLIB_restrict mode )
+struct _PDCLIB_file_t * fopen( const char * _PDCLIB_restrict filename, const char * _PDCLIB_restrict mode )
 {
-    FILE * rc;
+    struct _PDCLIB_file_t * rc;
     if ( mode == NULL || filename == NULL || filename[0] == '\0' )
     {
         /* Mode or filename invalid */
         return NULL;
     }
-    if ( ( rc = calloc( 1, sizeof( FILE ) ) ) == NULL )
+    if ( ( rc = calloc( 1, sizeof( struct _PDCLIB_file_t ) ) ) == NULL )
     {
         /* no memory for another FILE */
         return NULL;
     }
-    if ( ( rc->status = filemode( mode ) ) == 0 ) goto fail; /* invalid mode */
+    if ( ( rc->status = _PDCLIB_filemode( mode ) ) == 0 ) goto fail; /* invalid mode */
     rc->handle = _PDCLIB_open( filename, rc->status );
     if ( rc->handle == _PDCLIB_NOHANDLE ) goto fail; /* OS open() failed */
-
     /* Adding to list of open files */
     rc->next = _PDCLIB_filelist;
     _PDCLIB_filelist = rc;
-    /* Setting buffer. TODO: Check for unbuffered? */
-    if ( ( rc->buffer = malloc( BUFSIZ ) ) == NULL goto fail;
+    /* Setting buffer, and mark as internal. TODO: Check for unbuffered */
+    if ( ( rc->buffer = malloc( BUFSIZ ) ) == NULL ) goto fail;
+    rc->bufsize = BUFSIZ;
+    rc->bufidx = 0;
+    /* Setting buffer to _IOLBF because "when opened, a stream is fully
+       buffered if and only if it can be determined not to refer to an
+       interactive device."
+    */
+    rc->status |= ( _PDCLIB_LIBBUFFER | _PDCLIB_VIRGINSTR /* | _IOLBF */ ); /* FIXME: Uncommenting the _IOLBF here breaks output. */
     /* TODO: Setting mbstate */
     return rc;
 fail:
@@ -96,7 +57,25 @@ fail:
 
 int main( void )
 {
-    TESTCASE( NO_TESTDRIVER );
+    /* Some of the tests are not executed for regression tests, as the libc on
+       my system is at once less forgiving (segfaults on mode NULL) and more
+       forgiving (accepts undefined modes).
+    */
+#ifndef REGTEST
+    TESTCASE( fopen( NULL, NULL ) == NULL );
+#endif
+    TESTCASE( fopen( NULL, "w" ) == NULL );
+#ifndef REGTEST
+    TESTCASE( fopen( "", NULL ) == NULL );
+#endif
+    TESTCASE( fopen( "", "w" ) == NULL );
+    TESTCASE( fopen( "foo", "" ) == NULL );
+#ifndef REGTEST
+    TESTCASE( fopen( "testfile", "wq" ) == NULL ); /* Undefined mode */
+    TESTCASE( fopen( "testfile", "wr" ) == NULL ); /* Undefined mode */
+#endif
+    TESTCASE( fopen( "testfile", "w" ) != NULL );
+    system( "rm testfile" );
     return TEST_RESULTS;
 }