PDCLib includes with quotes, not <>.

[pdclib] / functions / stdio / vsscanf.c

diff --git a/functions/stdio/vsscanf.c b/functions/stdio/vsscanf.c
index c4565aada0320a307c06a044991c4acd504ce450..00210c1f3a55d0e7e107d42f3598f1759bc7e380 100644 (file)
--- a/functions/stdio/vsscanf.c
+++ b/functions/stdio/vsscanf.c
@@ -1,6 +1,4 @@
-/* $Id$ */
-
-/* vsscanf( const char *, const char *, va_list arg )
+/* vsscanf( const char *, 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.
@@ -10,27 +8,26 @@
 #include <stdarg.h>
 
 #ifndef REGTEST
+#include <ctype.h>
+#include "_PDCLIB_io.h"
 
-int vsscanf( const char * _PDCLIB_restrict s, const char * _PDCLIB_restrict format, va_list arg )
+int vsscanf( const char * _PDCLIB_restrict s, 
+             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;
-    /* In _PDCLIB_print, status.n holds the maximum number of characters to be
-       written. As we don't need that for the scanf() functions, we (ab)use
-       this field to hold the number of matching conversion specifiers.
-    */
-    status.n = 0; 
+    status.n = 0;
     status.i = 0;
-    status.this = 0;
-    /* In _PDCLIB_print, status.s is the string *printed to*. In the scanf()
-       functions, we (ab)use this field to hold the string *scanned from*.
-    */
-    status.s = (char *)s;
+    status.current = 0;
+    status.s = (char *) s;
     status.width = 0;
     status.prec = 0;
     status.stream = NULL;
     va_copy( status.arg, arg );
+
     while ( *format != '\0' )
     {
         const char * rc;
@@ -52,6 +49,11 @@ int vsscanf( const char * _PDCLIB_restrict s, const char * _PDCLIB_restrict form
                 /* Non-whitespace char in format string: Match verbatim */
                 if ( *status.s != *format )
                 {
+                    if ( *status.s == '\0' && status.n == 0 )
+                    {
+                        /* Early input error */
+                        return EOF;
+                    }
                     /* Matching error */
                     return status.n;
                 }
@@ -65,6 +67,15 @@ int vsscanf( const char * _PDCLIB_restrict s, const char * _PDCLIB_restrict form
         }
         else
         {
+            /* NULL return code indicates error */
+            if ( rc == NULL )
+            {
+                if ( ( *status.s == '\n' ) && ( status.n == 0 ) )
+                {
+                    status.n = EOF;
+                }
+                break;
+            }
             /* Continue parsing after conversion specifier */
             format = rc;
         }
@@ -76,22 +87,24 @@ int vsscanf( const char * _PDCLIB_restrict s, const char * _PDCLIB_restrict form
 #endif
 
 #ifdef TEST
-#include <_PDCLIB_test.h>
+#define _PDCLIB_FILEID "stdio/vsscanf.c"
+#define _PDCLIB_STRINGIO
+
+#include "_PDCLIB_test.h"
+
+static int testscanf( char const * stream, char const * format, ... )
+{
+    va_list ap;
+    va_start( ap, format );
+    int result = vsscanf( stream, format, ap );
+    va_end( ap );
+    return result;
+}
 
 int main( void )
 {
-    char const * teststring1 = "abc  def";
-    char const * teststring2 = "abcdef";
-    char const * teststring3 = "abc%def";
-    int x;
-    TESTCASE( sscanf( teststring2, "abcdef%n", &x ) == 0 );
-    TESTCASE( x == 6 );
-    TESTCASE( sscanf( teststring1, "abc def%n", &x ) == 0 );
-    TESTCASE( x == 8 );
-    TESTCASE( sscanf( teststring2, "abc def%n", &x ) == 0 );
-    TESTCASE( x == 6 );
-    TESTCASE( sscanf( teststring3, "abc%%def%n", &x ) == 0 );
-    TESTCASE( x == 7 );
+    char source[100];
+#include "scanf_testcases.h"
     return TEST_RESULTS;
 }