1 files changed, 113 insertions, 0 deletions
diff --git a/src/pdclib/functions/stdio/vfscanf.c b/src/pdclib/functions/stdio/vfscanf.c
new file mode 100644
index 0000000..bb24456
--- /dev/null
+++ b/src/pdclib/functions/stdio/vfscanf.c
@@ -0,0 +1,113 @@
+/* vfscanf( FILE *, const char *, va_list )
+
+   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>
+#include <ctype.h>
+
+#ifndef REGTEST
+
+int vfscanf( FILE * _PDCLIB_restrict stream, const char * _PDCLIB_restrict format, va_list arg )
+{
+    /* TODO: This function should interpret format as multibyte characters.  */
+    struct _PDCLIB_status_t status;
+    status.base = 0;
+    status.flags = 0;
+    status.n = 0;
+    status.i = 0;
+    status.current = 0;
+    status.s = NULL;
+    status.width = 0;
+    status.prec = EOF;
+    status.stream = stream;
+    va_copy( status.arg, arg );
+
+    while ( *format != '\0' )
+    {
+        const char * rc;
+        if ( ( *format != '%' ) || ( ( rc = _PDCLIB_scan( format, &status ) ) == format ) )
+        {
+            int c;
+            /* No conversion specifier, match verbatim */
+            if ( isspace( *format ) )
+            {
+                /* Whitespace char in format string: Skip all whitespaces */
+                /* No whitespaces in input does not result in matching error */
+                while ( isspace( c = getc( stream ) ) )
+                {
+                    ++status.i;
+                }
+                if ( ! feof( stream ) )
+                {
+                    ungetc( c, stream );
+                }
+            }
+            else
+            {
+                /* Non-whitespace char in format string: Match verbatim */
+                if ( ( ( c = getc( stream ) ) != *format ) || feof( stream ) )
+                {
+                    /* Matching error */
+                    if ( ! feof( stream ) && ! ferror( stream ) )
+                    {
+                        ungetc( c, stream );
+                    }
+                    else if ( status.n == 0 )
+                    {
+                        return EOF;
+                    }
+                    return status.n;
+                }
+                else
+                {
+                    ++status.i;
+                }
+            }
+            ++format;
+        }
+        else
+        {
+            /* NULL return code indicates matching error */
+            if ( rc == NULL )
+            {
+                break;
+            }
+            /* Continue parsing after conversion specifier */
+            format = rc;
+        }
+    }
+    va_end( status.arg );
+    return status.n;
+}
+
+#endif
+
+#ifdef TEST
+#define _PDCLIB_FILEID "stdio/vfscanf.c"
+#define _PDCLIB_FILEIO
+
+#include "_PDCLIB_test.h"
+
+static int testscanf( FILE * stream, const char * format, ... )
+{
+    va_list ap;
+    int result;
+    va_start( ap, format );
+    result = vfscanf( stream, format, ap );
+    va_end( ap );
+    return result;
+}
+
+int main( void )
+{
+    FILE * source;
+    TESTCASE( ( source = tmpfile() ) != NULL );
+#include "scanf_testcases.h"
+    TESTCASE( fclose( source ) == 0 );
+    return TEST_RESULTS;
+}
+
+#endif