giscanner: fix EOF check with flex >= 2.6.1

It looks like flex 2.6.1 changed [1] the return code for EOF in
yyinput.  Therefore, use the right value depending on the version of
flex which generates the lexer.

[1] https://github.com/westes/flex/commit/f863c9490e6912ffcaeb12965fb3a567a10745ff

https://bugzilla.gnome.org/show_bug.cgi?id=773272

1 files changed, 15 insertions, 6 deletions

diff --git a/giscanner/scannerlexer.l b/giscanner/scannerlexer.l
index 61c0a92d..7dbab5c8 100644
--- a/giscanner/scannerlexer.l
+++ b/giscanner/scannerlexer.l
@@ -59,6 +59,15 @@ static void process_linemarks (GISourceScanner *scanner, gboolean has_line);
 static int check_identifier (GISourceScanner *scanner, const char *);
 static int parse_ignored_macro (void);
 static void print_error (GISourceScanner *scanner);
+
+#if (YY_FLEX_MAJOR_VERSION > 2) \
+  || ((YY_FLEX_MAJOR_VERSION == 2) && (YY_FLEX_MINOR_VERSION > 6)) \
+  || ((YY_FLEX_MAJOR_VERSION == 2) && (YY_FLEX_MINOR_VERSION == 6) && (YY_FLEX_SUBMINOR_VERSION >= 1))
+#define IS_EOF 0
+#else
+#define IS_EOF EOF
+#endif
+
 %}
 
 %option nounput
@@ -273,7 +282,7 @@ parse_comment (GISourceScanner *scanner)
   c1 = input();
   c2 = input();
 
-  if (c2 != EOF && (c1 == '*' && c2 != '*' && c2 != '/')) {
+  if (c2 != IS_EOF && (c1 == '*' && c2 != '*' && c2 != '/')) {
     /*
      * Store GTK-Doc comment blocks,
      * starts with one '/' followed by exactly two '*' and not followed by a '/'
@@ -286,7 +295,7 @@ parse_comment (GISourceScanner *scanner)
 
     comment_lineno = lineno;
 
-    while (c2 != EOF && !(c1 == '*' && c2 == '/'))
+    while (c2 != IS_EOF && !(c1 == '*' && c2 == '/'))
       {
         if (!skip)
           g_string_append_c (string, c1);
@@ -314,7 +323,7 @@ parse_comment (GISourceScanner *scanner)
     /*
      * Ignore all other comment blocks
      */
-    while (c2 != EOF && !(c1 == '*' && c2 == '/'))
+    while (c2 != IS_EOF && !(c1 == '*' && c2 == '/'))
       {
         if (c1 == '\n')
           lineno++;
@@ -439,19 +448,19 @@ parse_ignored_macro (void)
 	int c;
 	int nest;
 
-	while ((c = input ()) != EOF && isspace (c))
+	while ((c = input ()) != IS_EOF && isspace (c))
 		;
 	if (c != '(')
 		return FALSE;
 
 	nest = 0;
-	while ((c = input ()) != EOF && (nest > 0 || c != ')')) {
+	while ((c = input ()) != IS_EOF && (nest > 0 || c != ')')) {
 		if (c == '(')
 			nest++;
 		else if (c == ')')
 			nest--;
 		else if (c == '"') {
-			while ((c = input ()) != EOF && c != '"') {
+			while ((c = input ()) != IS_EOF && c != '"') {
 				if (c == '\\')
 					c = input ();
 			}