Apply patch from Kalyanov Dmitry which fixes parsing of nested structs containing comments

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@10981 626c5289-ae23-0410-ae9c-e8d60b6d4f22

CHANGES.current

@@ -1,6 +1,14 @@
 Version 1.3.37 (in progress)
 ============================
 
+2008-12-12: wsfulton
+	    Apply patch from Kalyanov Dmitry which fixes parsing of nested structs
+	    containing comments.
+
+2008-12-12: wsfulton
+	    Fix error message in some nested struct and %inline parsing error situations
+	    such as unterminated strings and comments.
+
 2008-12-07: olly
 	    [PHP] Fix warnings when compiling generated wrapper with GCC 4.3.
 

Examples/test-suite/common.mk

@@ -79,7 +79,7 @@ CPP_TEST_BROKEN += \
 	extend_variable \
 	li_std_vector_ptr \
 	namespace_union \
-	nested_comment \
+	nested_struct \
 	overload_complicated \
 	template_default_pointer \
 	template_expr
@@ -235,6 +235,7 @@ CPP_TEST_CASES += \
 	namespace_typemap \
 	namespace_virtual_method \
 	naturalvar \
+	nested_comment \
 	newobject1 \
 	null_pointer \
 	operator_overload \

Examples/test-suite/nested_comment.i

@@ -18,24 +18,17 @@ in rlgc models */
 char *name;
 } n ;
 } s2; 
-
 %}
 
-// bug #491476
+// comment in nested struct
 %inline %{
-struct {
-struct {
-int a;
-} a, b;
-} a;
-
-%}
-
-// bug #909387
-%inline %{
-struct foo {
-  struct happy; // no warning
-  struct sad { int x; }; // warning
-  happy *good(); // produces good code
-  sad *bad(); // produces bad code
+struct a
+{
+  struct {
+    /*struct*/
+    struct {
+      int b;
+    } c;
+  } d;
 };
+%}

Examples/test-suite/nested_structs.i

@@ -0,0 +1,22 @@
+%module nested_structs
+
+// bug #491476
+%inline %{
+struct {
+struct {
+int a;
+} a, b;
+} a;
+
+%}
+
+// bug #909387
+%inline %{
+struct foo {
+  struct happy; // no warning
+  struct sad { int x; }; // warning
+  happy *good(); // produces good code
+  sad *bad(); // produces bad code
+};
+%}
+

Source/CParse/parser.y

@@ -1002,6 +1002,68 @@ static void add_nested(Nested *n) {
   }
 }
 
+/* Strips C-style and C++-style comments from string in-place. */
+static void strip_comments(char *string) {
+  int state = 0; /* 
+                  * 0 - not in comment
+                  * 1 - in c-style comment
+                  * 2 - in c++-style comment
+                  * 3 - in string
+                  * 4 - after reading / not in comments
+                  * 5 - after reading * in c-style comments
+                  * 6 - after reading \ in strings
+                  */
+  char * c = string;
+  while (*c) {
+    switch (state) {
+    case 0:
+      if (*c == '\"')
+        state = 3;
+      else if (*c == '/')
+        state = 4;
+      break;
+    case 1:
+      if (*c == '*')
+        state = 5;
+      *c = ' ';
+      break;
+    case 2:
+      if (*c == '\n')
+        state = 0;
+      else
+        *c = ' ';
+      break;
+    case 3:
+      if (*c == '\"')
+        state = 0;
+      else if (*c == '\\')
+        state = 6;
+      break;
+    case 4:
+      if (*c == '/') {
+        *(c-1) = ' ';
+        *c = ' ';
+        state = 2;
+      } else if (*c == '*') {
+        *(c-1) = ' ';
+        *c = ' ';
+        state = 1;
+      } else
+        state = 0;
+      break;
+    case 5:
+      if (*c == '/')
+        state = 0;
+      *c = ' ';
+      break;
+    case 6:
+      state = 3;
+      break;
+    }
+    ++c;
+  }
+}
+
 /* Dump all of the nested class declarations to the inline processor
  * However.  We need to do a few name replacements and other munging
  * first.  This function must be called before closing a class! */
@@ -1053,6 +1115,9 @@ static Node *dump_nested(const char *parent) {
        ret = retx; 
     */
 
+    /* Strip comments - further code may break in presence of comments. */
+    strip_comments(Char(n->code));
+
     /* Make all SWIG created typedef structs/unions/classes unnamed else 
        redefinition errors occur - nasty hack alert.*/