Fixes bug in source map handling (credit to @am11)

Author: mgreter

sass_interface.cpp

@@ -72,18 +72,18 @@ extern "C" {
     free(ctx);
   }
 
-  void copy_strings(const std::vector<std::string>& strings, char*** array, int* n) {
+  void copy_strings(const std::vector<std::string>& strings, char*** array, int* n, int skip = 0) {
     int num = static_cast<int>(strings.size());
     char** arr = (char**) malloc(sizeof(char*)* num);
 
-    for(int i = 0; i < num; i++) {
-      arr[i] = (char*) malloc(sizeof(char) * strings[i].size() + 1);
-      std::copy(strings[i].begin(), strings[i].end(), arr[i]);
-      arr[i][strings[i].size()] = '\0';
+    for(int i = skip; i < num; i++) {
+      arr[i-skip] = (char*) malloc(sizeof(char) * strings[i].size() + 1);
+      std::copy(strings[i].begin(), strings[i].end(), arr[i-skip]);
+      arr[i-skip][strings[i].size()] = '\0';
     }
 
     *array = arr;
-    *n = num;
+    *n = num - skip;
   }
 
   // helper for safe access to c_ctx
@@ -134,7 +134,7 @@ extern "C" {
       c_ctx->error_message = 0;
       c_ctx->error_status = 0;
 
-      copy_strings(cpp_ctx.get_included_files(), &c_ctx->included_files, &c_ctx->num_included_files);
+      copy_strings(cpp_ctx.get_included_files(), &c_ctx->included_files, &c_ctx->num_included_files, 1);
     }
     catch (Error& e) {
       stringstream msg_stream;

source_map.cpp

@@ -25,13 +25,13 @@ namespace Sass {
     json_append_member(json_srcmap, "version", json_mknumber(3));
 
     if (source_index.size() > 0) {
-      const char *include = includes[source_index[0]].c_str();
+      const char *include = file.c_str();
       JsonNode *json_include = json_mkstring(include);
       json_append_member(json_srcmap, "file", json_include);
     }
 
     JsonNode *json_includes = json_mkarray();
-    for (size_t i = 1; i < source_index.size(); ++i) {
+    for (size_t i = 0; i < source_index.size(); ++i) {
       const char *include = includes[source_index[i]].c_str();
       JsonNode *json_include = json_mkstring(include);
       json_append_element(json_includes, json_include);
@@ -48,8 +48,8 @@ namespace Sass {
     }
     json_append_member(json_srcmap, "sourcesContent", json_contents);
 
-    const char *mappings = serialize_mappings().c_str();
-    JsonNode *json_mappings = json_mkstring(mappings);
+    string mappings = serialize_mappings();
+    JsonNode *json_mappings = json_mkstring(mappings.c_str());
     json_append_member(json_srcmap, "mappings", json_mappings);
 
     JsonNode *json_names = json_mkarray();