From eb05f0547f16cca18536e48ae11bf41725aa43a1 Mon Sep 17 00:00:00 2001
From: Basile Burg <basile.burg@gmx.com>
Date: Tue, 15 Sep 2015 03:33:16 +0200
Subject: [PATCH] module name for #39

---
 cedast/build/cedast.coedit |  1 +
 cedast/src/ast.d           | 76 +++++++++++++++++++++++++++++++++++++-
 cedast/src/cedast.d        | 11 ++++--
 lazproj/cedast_loader.pas  | 22 ++++++++---
 4 files changed, 99 insertions(+), 11 deletions(-)

diff --git a/cedast/build/cedast.coedit b/cedast/build/cedast.coedit
index 73ff8323..5c678244 100644
--- a/cedast/build/cedast.coedit
+++ b/cedast/build/cedast.coedit
@@ -14,5 +14,6 @@ object CurrentProject: TCENativeProject
   ConfigurationIndex = 0
   LibraryAliases.Strings = (
     'libdparse'
+    'iz'
   )
 end
diff --git a/cedast/src/ast.d b/cedast/src/ast.d
index ca6f6885..b4814feb 100644
--- a/cedast/src/ast.d
+++ b/cedast/src/ast.d
@@ -1,21 +1,93 @@
 module ast;
 
-import std.d.lexer, std.d.parser, common;
+import std.d.lexer, std.d.parser, std.d.ast;
+import common;
+import iz.enumset;
+
+private
+{
+    enum AstInfos {moduleName, symbolList, todoList, WarnAndErr}
+    alias CachedInfos = EnumSet!(AstInfos, Set8);
+}
+
 
 struct Ast
 {
+
+private:
+
+    ubyte[] src;
+    string fname;
+    LexerConfig config;
+    StringCache strcache;
+    Module mod;
+    CachedInfos cachedInfos;
+    bool scanned;
+    string modName;
+
+    final static void parserError(string fname, size_t line, size_t col, string msg, bool isErr)
+    {
+    }
+
+    final void resetCachedInfo()
+    {
+        cachedInfos = 0;
+        modName = "";
+    }
+
+    final void scan()
+    {
+        resetCachedInfo;
+        scanned = false;
+        scope(success) scanned = true;
+
+        config = LexerConfig(fname, StringBehavior.source, WhitespaceBehavior.skip);
+        mod = parseModule(getTokensForParser(src, config, &strcache), fname, null, &parserError);
+    }
+
+public:
+
     this(string filename)
     {
         mixin(logcall);
+
+        import std.file;
+        fname = filename;
+        src = cast(ubyte[]) read(fname, size_t.max);
+        strcache = StringCache(StringCache.defaultBucketCount);
+        scan;
     }
 
     this(ubyte[] buffer)
     {
         mixin(logcall);
+        src = buffer.dup;
+        strcache = StringCache(StringCache.defaultBucketCount);
+        scan;
     }
 
-    void rescan()
+    final void rescan()
     {
         mixin(logcall);
+        resetCachedInfo;
+    }
+
+    final string moduleName()
+    {
+        string result;
+
+        if (!scanned)
+            return result;
+        if (AstInfos.moduleName in cachedInfos)
+            return modName;
+
+        cachedInfos += AstInfos.moduleName;
+        if (mod.moduleDeclaration)
+        foreach(Token t; mod.moduleDeclaration.moduleName.identifiers)
+            result ~= t.text ~ ".";
+
+        if (result.length)
+            modName = result[0 .. $-1];
+        return modName;
     }
 }
diff --git a/cedast/src/cedast.d b/cedast/src/cedast.d
index f6ebaafb..8ebba4dc 100644
--- a/cedast/src/cedast.d
+++ b/cedast/src/cedast.d
@@ -84,10 +84,15 @@ void unleash(AstToken tok)
 }
 
 extern(C) export
-char* moduleName(AstToken tok)
+immutable(char*) moduleName(AstToken tok)
 {
-    char* result = null;
-    return result;
+    if (tok < 1 || tok > modules.length)
+        return null;
+    Ast* mod = modules[tok - 1];
+    if (mod == null)
+        return null;
+    import std.string: toStringz;
+    return toStringz(mod.moduleName);
 }
 
 extern(C) export
diff --git a/lazproj/cedast_loader.pas b/lazproj/cedast_loader.pas
index 9dc308d0..cab26af7 100644
--- a/lazproj/cedast_loader.pas
+++ b/lazproj/cedast_loader.pas
@@ -10,6 +10,7 @@ type
   TScanBuffer = function (buffer: PByte; len: NativeUint): TAstToken; cdecl;
   TRescan     = procedure (tok: TAstToken); cdecl;
   TUnleash    = procedure (tok: TAstToken); cdecl;
+  TModuleName = function (tok: TAstToken): PChar; cdecl;
 
 var
   dast: TLibHandle;
@@ -17,30 +18,39 @@ var
   scanbuffer: TScanBuffer;
   rescan: TRescan;
   unleash: TUnleash;
+  moduleName: TModuleName;
   tok: TAstToken;
 
+const
+  testModule = 'module a.b.c.d.e.f.g.h; import std.stdio;';
+
 
 begin
 
-  dast := LoadLibrary('cedast.dll');
+  dast := LoadLibrary('cedast');
   if dast = NilHandle then
     writeln('dast invalid handle')
   else begin
     scanfile := TScanFile(GetProcAddress(dast, 'scanFile'));
     if scanFile = nil then writeln('invalid scanfile proc ptr')
-    else tok := scanfile(PChar('blah'));
-
-    scanbuffer := TScanBuffer(GetProcAddress(dast, 'scanBuffer'));
-    if scanbuffer = nil then writeln('invalid scanBuffer proc ptr')
-    else scanbuffer(nil, 0);
+    else tok := scanfile(PChar('exception in call so ticket value is 0'));
 
     rescan := TRescan(GetProcAddress(dast, 'rescan'));
     if rescan = nil then writeln('invalid rescan proc ptr')
     else rescan(tok);
 
+    scanbuffer := TScanBuffer(GetProcAddress(dast, 'scanBuffer'));
+    if scanbuffer = nil then writeln('invalid scanBuffer proc ptr')
+    else tok := scanbuffer(@testModule[1], length(testModule));
+
+    moduleName := TModuleName(GetProcAddress(dast, 'moduleName'));
+    if moduleName = nil then writeln('invalid moduleName proc ptr')
+    else if tok <> 0 then writeln(moduleName(tok));
+
     unleash := TUnleash(GetProcAddress(dast, 'unleash'));
     if unleash = nil then writeln('invalid unleash proc ptr')
     else unleash(tok);
+
   end;
 
   readln;