update libsass

libsass/backtrace.hpp

+#define SASS_BACKTRACE
+
+#include <sstream>
+
+namespace Sass {
+
+  using namespace std;
+
+  struct Backtrace {
+
+    Backtrace* parent;
+    string     path;
+    size_t     line;
+    string     caller;
+
+    Backtrace(Backtrace* prn, string pth, size_t ln, string c)
+    : parent(prn),
+      path(pth),
+      line(ln),
+      caller(c)
+    { }
+
+    string to_string(bool warning = false)
+    {
+      stringstream ss;
+      Backtrace* this_point = this;
+
+      if (!warning) ss << endl << "Backtrace:";
+      // the first tracepoint (which is parent-less) is an empty placeholder
+      while (this_point->parent) {
+        ss << endl
+           << "\t"
+           << (warning ? " " : "")
+           << this_point->path
+           << ":"
+           << this_point->line
+           << this_point->parent->caller;
+        this_point = this_point->parent;
+      }
+
+      return ss.str();
+    }
+
+  };
+
+}
\ No newline at end of file

libsass/constants.cpp

@@ -12,6 +12,7 @@ namespace Sass {
     extern const char function_kwd[]      = "@function";
     extern const char return_kwd[]        = "@return";
     extern const char include_kwd[]       = "@include";
+    extern const char content_kwd[]       = "@content";
     extern const char extend_kwd[]        = "@extend";
     extern const char if_kwd[]            = "@if";
     extern const char else_kwd[]          = "@else";
@@ -43,6 +44,7 @@ namespace Sass {
     extern const char kHz_kwd[]  = "kHz";
 
     // css functions and keywords
+    extern const char charset_kwd[]    = "@charset";
     extern const char media_kwd[]      = "@media";
     extern const char only_kwd[]       = "only";
     extern const char rgb_kwd[]        = "rgb(";
@@ -83,6 +85,7 @@ namespace Sass {
     extern const char rbrace[]      = "}";
     extern const char rparen[]      = ")";
     extern const char sign_chars[]  = "-+";
+    extern const char hyphen[]      = "-";
 
     // type names
     extern const char numeric_name[]    = "numeric value";

libsass/constants.hpp

@@ -12,6 +12,7 @@ namespace Sass {
     extern const char function_kwd[];
     extern const char return_kwd[];
     extern const char include_kwd[];
+    extern const char content_kwd[];
     extern const char extend_kwd[];
     extern const char if_kwd[];
     extern const char else_kwd[];
@@ -43,6 +44,7 @@ namespace Sass {
     extern const char kHz_kwd[];
 
     // css functions and keywords
+    extern const char charset_kwd[];
     extern const char media_kwd[];
     extern const char only_kwd[];
     extern const char rgb_kwd[];
@@ -83,6 +85,7 @@ namespace Sass {
     extern const char rbrace[];
     extern const char rparen[];
     extern const char sign_chars[];
+    extern const char hyphen[];
 
     // type names
     extern const char numeric_name[];

libsass/context.cpp

 #ifdef _WIN32
 #include <direct.h>
 #define getcwd _getcwd
+#define PATH_SEP ';'
 #else
 #include <unistd.h>
+#define PATH_SEP ':'
 #endif
 
 #include <cstring>
@@ -27,7 +29,7 @@ namespace Sass {
 
     if (paths_str) {
       const char* beg = paths_str;
-      const char* end = Prelexer::find_first<':'>(beg);
+      const char* end = Prelexer::find_first<PATH_SEP>(beg);
 
       while (end) {
         string path(beg, end - beg);
@@ -36,7 +38,7 @@ namespace Sass {
           include_paths.push_back(path);
         }
         beg = end + 1;
-        end = Prelexer::find_first<':'>(beg);
+        end = Prelexer::find_first<PATH_SEP>(beg);
       }
 
       string path(beg);
@@ -51,19 +53,20 @@ namespace Sass {
     // }
   }
   
-  Context::Context(const char* paths_str, const char* img_path_str)
+  Context::Context(const char* paths_str, const char* img_path_str, bool sc)
   : global_env(Environment()),
     function_env(map<string, Function>()),
     extensions(multimap<Node, Node>()),
     pending_extensions(vector<pair<Node, Node> >()),
-    source_refs(vector<char*>()),
+    source_refs(vector<const char*>()),
     include_paths(vector<string>()),
     color_names_to_values(map<string, Node>()),
     color_values_to_names(map<Node, string>()),
     new_Node(Node_Factory()),
     image_path(0),
     ref_count(0),
-    has_extensions(false)
+    has_extensions(false),
+    source_comments(sc)
   {
     register_functions();
     collect_include_paths(paths_str);
@@ -144,6 +147,7 @@ namespace Sass {
     register_function(adjust_color_sig, adjust_color);
     register_function(scale_color_sig, scale_color);
     register_function(change_color_sig, change_color);   
+    register_function(ie_hex_str_sig, ie_hex_str); 
     // String Functions
     register_function(unquote_sig, unquote);
     register_function(quote_sig, quote);

libsass/context.hpp

@@ -23,7 +23,7 @@ namespace Sass {
     map<string, Function> function_env;
     multimap<Node, Node> extensions;
     vector<pair<Node, Node> > pending_extensions;
-    vector<char*> source_refs; // all the source c-strings
+    vector<const char*> source_refs; // all the source c-strings
     vector<string> include_paths;
     map<string, Node> color_names_to_values;
     map<Node, string> color_values_to_names;
@@ -33,9 +33,10 @@ namespace Sass {
     // string sass_path;
     // string css_path;
     bool has_extensions;
+    bool source_comments;
 
     void collect_include_paths(const char* paths_str);
-    Context(const char* paths_str = 0, const char* img_path_str = 0);
+    Context(const char* paths_str = 0, const char* img_path_str = 0, bool sc = false);
     ~Context();
 
     void register_function(Signature sig, Primitive ip);

libsass/document.cpp

@@ -37,24 +37,40 @@ namespace Sass {
     const char* path_str = path.c_str();
     struct stat st;
     string tmp;
+
+    // Resolution order for ambiguous imports:
+    // (1) filename as given
+    // (2) underscore + given
+    // (3) underscore + given + extension
+    // (4) given + extension
+
+    // if the file as given isn't found ...
     if (stat(path_str, &st) == -1 || S_ISDIR(st.st_mode)) {
-        tmp = path + ".scss";
-        path_str = tmp.c_str();
-        if (stat(path_str, &st) == -1 || S_ISDIR(st.st_mode)) {
+      // then try "_" + given
       const char *full_path_str = path.c_str();
       const char *file_name_str = Prelexer::folders(full_path_str);
-            tmp = Token::make(full_path_str, file_name_str).to_string() +
-                  "_" +
-                  string(file_name_str);
+      string folder(Token::make(full_path_str, file_name_str).to_string());
+      string partial_filename("_" + string(file_name_str));
+      tmp = folder + partial_filename;
+      path_str = tmp.c_str();
+      // if "_" + given isn't found ...
+      if (stat(path_str, &st) == -1 || S_ISDIR(st.st_mode)) {
+        // then try "_" + given + ".scss"
+        tmp += ".scss";
         path_str = tmp.c_str();
+        // if "_" + given + ".scss" isn't found ...
         if (stat(path_str, &st) == -1 || S_ISDIR(st.st_mode)) {
-                tmp = tmp + ".scss";
+          // then try given + ".scss"
+          string non_partial_filename(string(file_name_str) + ".scss");
+          tmp = folder + non_partial_filename;
           path_str = tmp.c_str();
-                if (stat(path_str, &st) == -1 || S_ISDIR(st.st_mode))
+          // if we still can't find the file, then throw an error
+          if (stat(path_str, &st) == -1 || S_ISDIR(st.st_mode)) {
             throw path;
           }
         }
       }
+    }
     f = std::fopen(path_str, "rb");
     size_t len = st.st_size;
     char* source = new char[len + 1];
@@ -70,7 +86,7 @@ namespace Sass {
     string include_path(path_str, file_name_str - path_str);
 
     Document doc(ctx);
-    doc.path        = path;
+    doc.path        = path_str;
     doc.line        = 1;
     doc.root        = ctx.new_Node(Node::root, path, 1, 0);
     doc.lexed       = Token::make();
@@ -79,14 +95,11 @@ namespace Sass {
     doc.end         = end;
     doc.position    = source;
     doc.context.source_refs.push_back(source);
-    if (!include_path.empty()) {
-      doc.context.include_paths.push_back(include_path);
-    }
 
     return doc;
   }
 
-  Document Document::make_from_source_chars(Context& ctx, char* src, string path, bool own_source)
+  Document Document::make_from_source_chars(Context& ctx, const char* src, string path, bool own_source)
   {
     Document doc(ctx);
     doc.path = path;
@@ -110,7 +123,7 @@ namespace Sass {
     doc.root = ctx.new_Node(Node::root, path, 1, 0);
     doc.lexed = Token::make();
     doc.own_source = false;
-    doc.source = const_cast<char*>(t.begin);
+    doc.source = t.begin;
     doc.end = t.end;
     doc.position = doc.source;
 
@@ -134,11 +147,14 @@ namespace Sass {
       root.echo(output);
       break;
     case nested:
-      root.emit_nested_css(output, 0, true);
+      root.emit_nested_css(output, 0, true, false, context.source_comments);
       break;
     case expanded:
       root.emit_expanded_css(output, "");
       break;
+    case compressed:
+      root.emit_compressed_css(output);
+      break;
     default:
       break;
     }

libsass/document.hpp

@@ -29,7 +29,7 @@ namespace Sass {
     enum CSS_Style { nested, expanded, compact, compressed, echo };
     
     string path;
-    char* source;
+    const char* source;
     const char* position;
     const char* end;
     size_t line;
@@ -48,7 +48,7 @@ namespace Sass {
     ~Document();
 
     static Document make_from_file(Context& ctx, string path);
-    static Document make_from_source_chars(Context& ctx, char* src, string path = "", bool own_source = false);
+    static Document make_from_source_chars(Context& ctx, const char* src, string path = "", bool own_source = false);
     static Document make_from_token(Context& ctx, Token t, string path = "", size_t line_number = 1);
 
     template <prelexer mx>
@@ -133,7 +133,7 @@ namespace Sass {
     Node parse_function_definition();
     Node parse_parameters();
     Node parse_parameter(Node::Type);
-    Node parse_mixin_call();
+    Node parse_mixin_call(Node::Type inside_of = Node::none);
     Node parse_arguments();
     Node parse_argument(Node::Type);
     Node parse_assignment();

libsass/eval_apply.hpp

@@ -10,19 +10,23 @@
 #include "context.hpp"
 #endif
 
+#ifndef SASS_BACKTRACE
+#include "backtrace.hpp"
+#endif
+
 namespace Sass {
   using std::map;
 
-  void expand(Node expr, Node prefix, Environment& env, map<string, Function>& f_env, Node_Factory& new_Node, Context& ctx, bool function_name = false);
-  Node eval(Node expr, Node prefix, Environment& env, map<string, Function>& f_env, Node_Factory& new_Node, Context& ctx, bool function_name = false);
-  Node eval_arguments(Node args, Node prefix, Environment& env, map<string, Function>& f_env, Node_Factory& new_Node, Context& ctx);
-  Node eval_function(string name, Node stm, Environment& bindings, Node_Factory& new_Node, Context& ctx, bool toplevel = false);
-  Node reduce(Node list, size_t head, Node acc, Node_Factory& new_Node);
-  Node accumulate(Node::Type op, Node acc, Node rhs, Node_Factory& new_Node);
-  double operate(Node op, double lhs, double rhs);
+  void expand(Node expr, Node prefix, Environment& env, map<string, Function>& f_env, Node_Factory& new_Node, Context& ctx, Backtrace& bt, bool function_name = false, const Node content = Node());
+  void re_expand(Node expr, Node prefix, Environment& env, map<string, Function>& f_env, Node_Factory& new_Node, Context& ctx, Backtrace& bt, bool function_name, const Node content);
+  Node eval(Node expr, Node prefix, Environment& env, map<string, Function>& f_env, Node_Factory& new_Node, Context& ctx, Backtrace& bt, bool function_name = false);
+  Node eval_arguments(Node args, Node prefix, Environment& env, map<string, Function>& f_env, Node_Factory& new_Node, Context& ctx, Backtrace& bt);
+  Node eval_function(string name, Node stm, Environment& bindings, Node_Factory& new_Node, Context& ctx, Backtrace& bt, bool toplevel = false);
+  Node reduce(Node list, size_t head, Node acc, Node_Factory& new_Node, Backtrace& bt);
+  double operate(Node op, double lhs, double rhs, Backtrace& bt);
   
-  Node apply_mixin(Node mixin, const Node args, Node prefix, Environment& env, map<string, Function>& f_env, Node_Factory& new_Node, Context& ctx, bool dynamic_scope = false);
-  Node apply_function(const Function& f, const Node args, Node prefix, Environment& env, map<string, Function>& f_env, Node_Factory& new_Node, Context& ctx, string& path, size_t line);
+  Node apply_mixin(Node mixin, const Node args, const Node content, Node prefix, Environment& env, map<string, Function>& f_env, Node_Factory& new_Node, Context& ctx, Backtrace& bt, bool dynamic_scope = false);
+  Node apply_function(const Function& f, const Node args, Node prefix, Environment& env, map<string, Function>& f_env, Node_Factory& new_Node, Context& ctx, Backtrace& bt, string& path, size_t line);
   Node expand_selector(Node sel, Node pre, Node_Factory& new_Node);
   Node expand_backref(Node sel, Node pre);
   void extend(Node expr, multimap<Node, Node>& extension_requests, Node_Factory& new_Node);

libsass/node.cpp

@@ -19,6 +19,7 @@ namespace Sass {
     {
       case block:
       case mixin_call:
+      case mixin_content:
       case root:
       case if_directive:
       case for_through_directive:
@@ -35,6 +36,7 @@ namespace Sass {
       switch (at(i).type())
       {
         case mixin_call:
+        case mixin_content:
         case block:
         case if_directive:
         case for_through_directive:
@@ -44,6 +46,7 @@ namespace Sass {
           Node expn(at(i));
           if (expn.has_expansions()) expn.flatten();
           ip_->has_statements |= expn.has_statements();
+          ip_->has_comments   |= expn.has_comments();
           ip_->has_blocks     |= expn.has_blocks();
           ip_->has_expansions |= expn.has_expansions();
           // TO DO: make this more efficient -- replace with a dummy node instead of erasing

libsass/node.hpp

@@ -142,6 +142,7 @@ namespace Sass {
       numeric_percentage,
       numeric_dimension,
       numeric_color,
+      ie_hex_str,
       boolean,
       important,
 
@@ -154,6 +155,7 @@ namespace Sass {
       function_call,
       mixin,
       mixin_call,
+      mixin_content,
       parameters,
       arguments,
 
@@ -183,6 +185,7 @@ namespace Sass {
 
     bool has_children() const;
     bool has_statements() const;
+    bool has_comments() const;
     bool has_blocks() const;
     bool has_expansions() const;
     bool has_backref() const;
@@ -237,11 +240,12 @@ namespace Sass {
     bool operator>(Node rhs) const;
     bool operator>=(Node rhs) const;
 
-    string to_string(Type inside_of = none) const;
-    void emit_nested_css(stringstream& buf, size_t depth, bool at_toplevel = false, bool in_media_query = false);
-    void emit_propset(stringstream& buf, size_t depth, const string& prefix);
+    string to_string(Type inside_of = none, const string space = " ") const;
+    void emit_nested_css(stringstream& buf, size_t depth, bool at_toplevel = false, bool in_media_query = false, bool source_comments = false);
+    void emit_propset(stringstream& buf, size_t depth, const string& prefix, const bool compressed = false);
     void echo(stringstream& buf, size_t depth = 0);
     void emit_expanded_css(stringstream& buf, const string& prefix);
+    void emit_compressed_css(stringstream& buf);
 
   };
   
@@ -264,6 +268,7 @@ namespace Sass {
 
     bool has_children;
     bool has_statements;
+    bool has_comments;
     bool has_blocks;
     bool has_expansions;
     bool has_backref;
@@ -281,6 +286,7 @@ namespace Sass {
       type(Node::none), */
       has_children(false),
       has_statements(false),
+      has_comments(false),
       has_blocks(false),
       has_expansions(false),
       has_backref(false),
@@ -349,9 +355,13 @@ namespace Sass {
     {
       children.push_back(n);
       has_children = true;
+      if (n.is_null()) return;
       switch (n.type())
       {
-        case Node::comment:
+        case Node::comment: {
+          has_comments = true;
+        } break;
+
         case Node::css_import:
         case Node::rule:
         case Node::propset:
@@ -372,7 +382,8 @@ namespace Sass {
         case Node::for_to_directive:
         case Node::each_directive:
         case Node::while_directive:
-        case Node::mixin_call: {
+        case Node::mixin_call:
+        case Node::mixin_content: {
           has_expansions = true;
         } break;
 
@@ -391,7 +402,8 @@ namespace Sass {
       has_children = true;
       switch (n.type())
       {
-        case Node::comment:
+        case Node::comment:       has_comments   = true; break;
+
         case Node::css_import:
         case Node::rule:
         case Node::propset:       has_statements = true; break;
@@ -404,7 +416,8 @@ namespace Sass {
         case Node::for_to_directive:
         case Node::each_directive:
         case Node::while_directive:
-        case Node::mixin_call: has_expansions = true; break;
+        case Node::mixin_call:
+        case Node::mixin_content: has_expansions = true; break;
 
         case Node::backref:       has_backref    = true; break;
 
@@ -440,6 +453,7 @@ namespace Sass {
 
   inline bool Node::has_children() const   { return ip_->has_children; }
   inline bool Node::has_statements() const { return ip_->has_statements; }
+  inline bool Node::has_comments() const   { return ip_->has_comments; }
   inline bool Node::has_blocks() const     { return ip_->has_blocks; }
   inline bool Node::has_expansions() const { return ip_->has_expansions; }
   inline bool Node::has_backref() const    { return ip_->has_backref; }

libsass/node_factory.hpp

@@ -26,9 +26,7 @@ namespace Sass {
     Node operator()(Node::Type type, string file, size_t line, Token t);
     // for making boolean values or interior nodes that have children
     Node operator()(Node::Type type, string file, size_t line, size_t size);
-    // // for making nodes representing boolean values
-    // Node operator()(Node::Type type, string file, size_t line, bool b);
-    // for making nodes representing numbers
+    // for making nodes representing numbers and numeric percentages
     Node operator()(string file, size_t line, double v, Node::Type type = Node::number);
     // for making nodes representing numeric dimensions (e.g. 5px, 3em)
     Node operator()(string file, size_t line, double v, const Token& t);

libsass/prelexer.cpp

@@ -138,6 +138,10 @@ namespace Sass {
       return exactly<include_kwd>(src);
     }
 
+    const char* content(const char* src) {
+      return exactly<content_kwd>(src);
+    }
+
     const char* extend(const char* src) {
       return exactly<extend_kwd>(src);
     }
@@ -383,5 +387,32 @@ namespace Sass {
     const char* folders(const char* src) {
       return zero_plus< folder >(src);
     }
+
+    const char* chunk(const char* src) {
+      char inside_str = 0;
+      const char* p = src;
+      size_t depth = 0;
+      while (true) {
+        if (!*p) {
+          return 0;
+        }
+        else if (!inside_str && (*p == '"' || *p == '\'')) {
+          inside_str = *p;
+        }
+        else if (*p == inside_str && *(p-1) != '\\') {
+          inside_str = 0;
+        }
+        else if (*p == '(' && !inside_str) {
+          ++depth;
+        }
+        else if (*p == ')' && !inside_str) {
+          if (depth == 0) return p;
+          else            --depth;
+        }
+        ++p;
+      }
+      // unreachable
+      return 0;
+    }
   }
 }
\ No newline at end of file

libsass/prelexer.hpp

@@ -317,6 +317,7 @@ namespace Sass {
     const char* function(const char* src);
     const char* return_directive(const char* src);
     const char* include(const char* src);
+    const char* content(const char* src);
     const char* extend(const char* src);
 
     const char* if_directive(const char* src);
@@ -447,5 +448,7 @@ namespace Sass {
       }
       return counter;
     }
+
+    const char* chunk(const char* src);
   }
 }

libsass/sass_interface.cpp

@@ -45,13 +45,15 @@ extern "C" {
   static char* process_document(Sass::Document& doc, int style)
   {
     using namespace Sass;
+    Backtrace root_trace(0, "", 0, "");
     doc.parse_scss();
     expand(doc.root,
            Node(),
            doc.context.global_env,
            doc.context.function_env,
            doc.context.new_Node,
-           doc.context);
+           doc.context,
+           root_trace);
     // extend_selectors(doc.context.pending_extensions, doc.context.extensions, doc.context.new_Node);
     if (doc.context.has_extensions) extend(doc.root, doc.context.extensions, doc.context.new_Node);
     string output(doc.emit_css(static_cast<Document::CSS_Style>(style)));
@@ -64,7 +66,7 @@ extern "C" {
   {
     using namespace Sass;
     try {
-      Context cpp_ctx(c_ctx->options.include_paths, c_ctx->options.image_path);
+      Context cpp_ctx(c_ctx->options.include_paths, c_ctx->options.image_path, c_ctx->options.source_comments);
       // cpp_ctx.image_path = c_ctx->options.image_path;
       // Document doc(0, c_ctx->input_string, cpp_ctx);
       Document doc(Document::make_from_source_chars(cpp_ctx, c_ctx->source_string));
@@ -74,7 +76,7 @@ extern "C" {
     }
     catch (Error& e) {
       stringstream msg_stream;
-      msg_stream << "ERROR -- " << e.path << ", line " << e.line << ": " << e.message << endl;
+      msg_stream << e.path << ":" << e.line << ": error: " << e.message << endl;
       string msg(msg_stream.str());
       char* msg_str = (char*) malloc(msg.size() + 1);
       strcpy(msg_str, msg.c_str());
@@ -84,7 +86,7 @@ extern "C" {
     }
     catch(bad_alloc& ba) {
       stringstream msg_stream;
-      msg_stream << "ERROR -- unable to allocate memory: " << ba.what() << endl;
+      msg_stream << "Unable to allocate memory: " << ba.what() << endl;
       string msg(msg_stream.str());
       char* msg_str = (char*) malloc(msg.size() + 1);
       strcpy(msg_str, msg.c_str());
@@ -99,22 +101,16 @@ extern "C" {
   int sass_compile_file(sass_file_context* c_ctx)
   {
     using namespace Sass;
+    Context cpp_ctx(c_ctx->options.include_paths, c_ctx->options.image_path, c_ctx->options.source_comments);
     try {
-      Context cpp_ctx(c_ctx->options.include_paths, c_ctx->options.image_path);
-      // Document doc(c_ctx->input_path, 0, cpp_ctx);
-      // string path_string(c_ctx->options.image_path);
-      // path_string = "'" + path_string + "/";
-      // cpp_ctx.image_path = c_ctx->options.image_path;
       Document doc(Document::make_from_file(cpp_ctx, string(c_ctx->input_path)));
-      // cerr << "MADE A DOC AND CONTEXT OBJ" << endl;
-      // cerr << "REGISTRY: " << doc.context.registry.size() << endl;
       c_ctx->output_string = process_document(doc, c_ctx->options.output_style);
       c_ctx->error_message = 0;
       c_ctx->error_status = 0;
     }
     catch (Error& e) {
       stringstream msg_stream;
-      msg_stream << "ERROR -- " << e.path << ", line " << e.line << ": " << e.message << endl;
+      msg_stream << e.path << ":" << e.line << ": error: " << e.message << endl;
       string msg(msg_stream.str());
       char* msg_str = (char*) malloc(msg.size() + 1);
       strcpy(msg_str, msg.c_str());
@@ -124,7 +120,30 @@ extern "C" {
     }
     catch(bad_alloc& ba) {
       stringstream msg_stream;
-      msg_stream << "ERROR -- unable to allocate memory: " << ba.what() << endl;
+      msg_stream << "Unable to allocate memory: " << ba.what() << endl;
+      string msg(msg_stream.str());
+      char* msg_str = (char*) malloc(msg.size() + 1);
+      strcpy(msg_str, msg.c_str());
+      c_ctx->error_status = 1;
+      c_ctx->output_string = 0;
+      c_ctx->error_message = msg_str;
+    }
+    catch(string& bad_path) {
+      for (vector<string>::iterator path = cpp_ctx.include_paths.begin(); path < cpp_ctx.include_paths.end(); ++path) {
+        try {
+          Document doc(Document::make_from_file(cpp_ctx, *path + string(c_ctx->input_path)));
+          c_ctx->output_string = process_document(doc, c_ctx->options.output_style);
+          c_ctx->error_message = 0;
+          c_ctx->error_status = 0;
+          return 0;
+        }
+        catch (string& bad_path) {
+          // continue looping
+        }
+      }
+      // couldn't find the specified file in the include paths; report an error
+      stringstream msg_stream;
+      msg_stream << "error reading file \"" << bad_path << "\"" << endl;
       string msg(msg_stream.str());
       char* msg_str = (char*) malloc(msg.size() + 1);
       strcpy(msg_str, msg.c_str());

libsass/sass_interface.h

-#include <node.h>
+#define SASS_INTERFACE
 
 #ifdef __cplusplus
 extern "C" {
@@ -11,18 +11,17 @@ extern "C" {
 
 struct sass_options {
   int output_style;
+  int source_comments; // really want a bool, but C doesn't have them
   char* include_paths;
   char* image_path;
 };
 
 struct sass_context {
-  char* source_string;
+  const char* source_string;
   char* output_string;
   struct sass_options options;
   int error_status;
   char* error_message;
-  uv_work_t request;
-  v8::Persistent<v8::Function> callback;
 };
 
 struct sass_file_context {