X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdio%2Ffscanf.c;h=17b0dca4c9add00de4e45f667628696d137f3c5e;hb=526e9954c39f30819e421cb74e82aa59d5a41013;hp=11708417d1c472b560161a91171a391fd51b581a;hpb=34893ecc2200dc7017c36a54cb6c5f4c2378b5ec;p=pdclib

diff --git a/functions/stdio/fscanf.c b/functions/stdio/fscanf.c
index 1170841..17b0dca 100644
--- a/functions/stdio/fscanf.c
+++ b/functions/stdio/fscanf.c
@@ -1,8 +1,81 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-int fscanf( FILE * restrict stream, const char * restrict format, ... ) { /* TODO */ };
+/* $Id$ */
+
+/* fscanf( FILE *, const char *, ... )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <stdio.h>
+#include <stdarg.h>
+
+#ifndef REGTEST
+
+int fscanf( FILE * _PDCLIB_restrict stream, const char * _PDCLIB_restrict format, ... )
+{
+    int rc;
+    va_list ap;
+    va_start( ap, format );
+    rc = vfscanf( stream, format, ap );
+    va_end( ap );
+    return rc;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+#include <string.h>
+
+char scanstring[] = "  1 23\00045\000\00067 ";
+
+void scantest( int testnr, FILE * fh, size_t position, char const * format, 
+               int expected_fscan_rc, char const * expected_fscan_output, size_t expected_fscan_length, 
+               int expected_sscan_rc, char const * expected_sscan_output, size_t expected_sscan_length )
+{
+    char buffer[15];
+    printf( "Test %d\n", testnr );
+    TESTCASE( memset( buffer, -1, 15 ) == buffer );
+    TESTCASE( fseek( fh, position, SEEK_SET ) == 0 );
+    TESTCASE( fscanf( fh, format, buffer ) == expected_fscan_rc );
+    TESTCASE( memcmp( buffer, expected_fscan_output, expected_fscan_length ) == 0 );
+    TESTCASE( memset( buffer, -1, 15 ) == buffer );
+    TESTCASE( sscanf( scanstring + position, format, buffer ) == expected_sscan_rc );
+    TESTCASE( memcmp( buffer, expected_sscan_output, expected_sscan_length ) == 0 );
+}
+
+int main( void )
+{
+    FILE * fh;
+    TESTCASE( ( fh = fopen( "testfile", "w+" ) ) != NULL );
+    TESTCASE( fwrite( scanstring, 14, 1, fh ) == 1 );
+    rewind( fh );
+
+    /* %14c - full scan */
+    scantest( 1, fh, 0, "%14c",
+              1, "  1 23\00045\000\00067 \377", 15,
+              1, "  1 23\377", 7 );
+
+    /* %c - default to one, reading whitespace */
+    scantest( 2, fh, 0, "%c",
+              1, " \377", 2,
+              1, " \377", 2 );
+
+    /* %1c - reading zero byte */
+    scantest( 3, fh, 9, "%1c",
+              1, "\000\377", 2,
+              -1, "\377", 1 );
+
+    /* %0c - NOT reading EOF */
+    scantest( 4, fh, 13, "%0c",
+              0, "\377", 1,
+              0, "\377", 1 );
+              
+    TESTCASE( fclose( fh ) == 0 );
+    //TESTCASE( remove( "testfile" ) == 0 );
+
+    return TEST_RESULTS;
+}
+
+#endif