import ipfilter 4.1.8 into the vendor branch

1 files changed, 55 insertions, 0 deletions

diff --git a/contrib/ipfilter/tools/lex_var.h b/contrib/ipfilter/tools/lex_var.h
new file mode 100644
index 0000000..33fba25
--- /dev/null
+++ b/contrib/ipfilter/tools/lex_var.h
@@ -0,0 +1,55 @@
+/*	$NetBSD$	*/
+
+
+extern	long		string_start;
+extern	long		string_end;
+extern	char		*string_val;
+extern	long		pos;
+
+#define YY_INPUT(buf, result, max_size) \
+	if (pos >= string_start && pos <= string_end) { \
+		buf[0] = string_val[pos - string_start]; \
+		pos++; \
+		result = 1; \
+	} else if ( yy_current_buffer->yy_is_interactive ) \
+		{ \
+		int c = '*', n; \
+		for ( n = 0; n < 1 && \
+			     (c = getc( yyin )) != EOF && c != '\n'; ++n ) \
+			buf[n] = (char) c; \
+		if ( c == '\n' ) \
+			buf[n++] = (char) c; \
+		if ( c == EOF && ferror( yyin ) ) \
+			YY_FATAL_ERROR( "input in flex scanner failed" ); \
+		result = n; \
+		pos++; \
+		} \
+	else if ( ((result = fread( buf, 1, 1, yyin )) == 0) \
+		  && ferror( yyin ) ) \
+		YY_FATAL_ERROR( "input in flex scanner failed" );
+
+#ifdef input
+# undef input
+# define input() (((pos >= string_start) && (pos < string_end)) ? \
+		  yysptr = yysbuf, string_val[pos++ - string_start] : \
+		  ((yytchar = yysptr > yysbuf ? U(*--yysptr) : \
+		   getc(yyin)) == 10 ? (pos++, yylineno++, yytchar) : \
+		  yytchar) == EOF ? (pos++, 0) : (pos++, yytchar))
+#endif
+
+#ifdef lex_input
+# undef lex_input
+# define lex_input() (((pos >= string_start) && (pos < string_end)) ? \
+		  yysptr = yysbuf, string_val[pos++ - string_start] : \
+		  ((yytchar = yysptr > yysbuf ? U(*--yysptr) : \
+		   getc(yyin)) == 10 ? (pos++, yylineno++, yytchar) : \
+		  yytchar) == EOF ? (pos++, 0) : (pos++, yytchar))
+#endif
+
+#ifdef unput
+# undef unput
+# define unput(c) { if (pos > 0) pos--; \
+		    yytchar = (c); if (yytchar == '\n') yylineno--; \
+		    *yysptr++ = yytchar; }
+#endif
+