From b103ede28c8210186ede6965971319aac467a4ca Mon Sep 17 00:00:00 2001
From: Peter Slattery <slattery.peter.j@gmail.com>
Date: Sat, 29 Feb 2020 14:43:07 -0800
Subject: [PATCH] Made the meta system put generated files relative to the root
 file rather than at an absolute path

---
 meta/foldhaus_meta.cpp                     | 41 ++++++++++++++++++++--
 src/generated/gs_meta_genreated_typeinfo.h | 32 +++++++++++++++++
 todo.txt                                   |  3 +-
 3 files changed, 72 insertions(+), 4 deletions(-)
 create mode 100644 src/generated/gs_meta_genreated_typeinfo.h

diff --git a/meta/foldhaus_meta.cpp b/meta/foldhaus_meta.cpp
index f7cacba..1d8f85b 100644
--- a/meta/foldhaus_meta.cpp
+++ b/meta/foldhaus_meta.cpp
@@ -254,6 +254,19 @@ GeneratePanelMetaInfo(gs_meta_preprocessor Meta, string_builder* PanelCodeGen)
     WriteF(PanelCodeGen, "};\n");
 }
 
+internal string
+AllocAndConcatStrings(string First, string Second)
+{
+    string Result = {0};
+    Result.Max = First.Length + Second.Length + 1;
+    Result.Memory = (char*)malloc(sizeof(char) * Result.Max);
+    ConcatString(First, &Result);
+    ConcatString(Second, &Result);
+    NullTerminate(&Result);
+    Result.Length -= 1;
+    return Result;
+}
+
 int main(int ArgCount, char* Args[])
 {
     if (ArgCount <= 1)
@@ -262,6 +275,13 @@ int main(int ArgCount, char* Args[])
         return 0;
     }
     
+    string RootFile = MakeString(Args[1]);
+    s32 IndexOfLastSlash = ReverseSearchForCharInSet(RootFile, "\\/");
+    string WorkingDirectory = Substring(RootFile, 0, IndexOfLastSlash + 1);
+    string GeneratedDirectoryName = MakeStringLiteral("generated\\");
+    string GeneratedFilesDirectory = AllocAndConcatStrings(WorkingDirectory, GeneratedDirectoryName);
+    printf("Putting Generated Files In %s\n", GeneratedFilesDirectory.Memory);
+    
     gs_meta_preprocessor Meta = PreprocessProgram(Args[1]);
     
     typeinfo_generator TypeGenerator = InitTypeInfoGenerator(Meta.TypeTable);
@@ -278,7 +298,8 @@ int main(int ArgCount, char* Args[])
     string_builder PanelCodeGen = {0};
     GeneratePanelMetaInfo(Meta, &PanelCodeGen);
     
-    FILE* TypeInfoH = fopen("C:\\projects\\foldhaus\\src\\generated\\gs_meta_generated_typeinfo.h", "w");
+    string TypeInfoHFilePath = AllocAndConcatStrings(GeneratedFilesDirectory, MakeStringLiteral("gs_meta_genreated_typeinfo.h"));
+    FILE* TypeInfoH = fopen(TypeInfoHFilePath.Memory, "w");
     if (TypeInfoH)
     {
         WriteStringBuilderToFile(TypeGenerator.MetaTagEnum, TypeInfoH);
@@ -288,8 +309,13 @@ int main(int ArgCount, char* Args[])
         WriteStringBuilderToFile(TypeGenerator.TypeDefinitions, TypeInfoH);
         fclose(TypeInfoH);
     }
+    else
+    {
+        printf("Error: Unable to open file at %.*s\n", StringExpand(TypeInfoHFilePath));
+    }
     
-    FILE* NodeInfoH = fopen("C:\\projects\\foldhaus\\src\\generated\\foldhaus_nodes_generated.h", "w");
+    string NodeInfoHFilePath = AllocAndConcatStrings(GeneratedFilesDirectory, MakeStringLiteral("foldhaus_nodes_generated.h"));
+    FILE* NodeInfoH = fopen(TypeInfoHFilePath.Memory, "w");
     if (NodeInfoH)
     {
         WriteStringBuilderToFile(*NodeTypeGen.Builder, NodeInfoH);
@@ -297,13 +323,22 @@ int main(int ArgCount, char* Args[])
         WriteStringBuilderToFile(CallNodeProcGen, NodeInfoH);
         fclose(NodeInfoH);
     }
+    else
+    {
+        printf("Error: Unable to open file at %.*s\n", StringExpand(NodeInfoHFilePath));
+    }
     
-    FILE* PanelInfoH = fopen("C:\\projects\\foldhaus\\src\\generated\\foldhaus_panels_generated.h", "w");
+    string PanelInfoHFilePath = AllocAndConcatStrings(GeneratedFilesDirectory, MakeStringLiteral("foldhaus_panels_generated.h"));
+    FILE* PanelInfoH = fopen(PanelInfoHFilePath.Memory, "w");
     if (PanelInfoH)
     {
         WriteStringBuilderToFile(PanelCodeGen, PanelInfoH);
         fclose(PanelInfoH);
     }
+    else
+    {
+        printf("Error: Unable to open file at %.*s\n", StringExpand(PanelInfoHFilePath));
+    }
     
     FinishMetaprogram(&Meta);
     
diff --git a/src/generated/gs_meta_genreated_typeinfo.h b/src/generated/gs_meta_genreated_typeinfo.h
new file mode 100644
index 0000000..f72b4bb
--- /dev/null
+++ b/src/generated/gs_meta_genreated_typeinfo.h
@@ -0,0 +1,32 @@
+enum node_type
+{
+    NodeType_RevolvingDiscs,
+    NodeType_SolidColorProc,
+    NodeType_VerticalColorFadeProc,
+    NodeType_Count,
+};
+
+static node_specification_ NodeSpecifications[] = {
+{ NodeType_RevolvingDiscs, {"RevolvingDiscs", 14}, gsm_StructType_revolving_discs_data }, 
+{ NodeType_SolidColorProc, {"SolidColorProc", 14}, gsm_StructType_solid_color_data }, 
+{ NodeType_VerticalColorFadeProc, {"VerticalColorFadeProc", 21}, gsm_StructType_vertical_color_fade_data }, 
+};
+
+void CallNodeProc(node_type Type, u8* NodeData)
+{
+    switch(Type) { 
+        case NodeType_RevolvingDiscs:
+        {
+            RevolvingDiscs((revolving_discs_data*)NodeData);
+        } break;
+        case NodeType_SolidColorProc:
+        {
+            SolidColorProc((solid_color_data*)NodeData);
+        } break;
+        case NodeType_VerticalColorFadeProc:
+        {
+            VerticalColorFadeProc((vertical_color_fade_data*)NodeData);
+        } break;
+    }
+}
+
diff --git a/todo.txt b/todo.txt
index 080fbf7..c6a27ca 100644
--- a/todo.txt
+++ b/todo.txt
@@ -2,8 +2,9 @@ TODO FOLDHAUS
 
 Ground Up Reengineering
 - Metaprogramming
-    - panels metaprogramming
+    x panels metaprogramming
     - fix memory layout (remeber to profile before and after)
+    x get the meta program to generate code in the codebase's directory, no matter where it is 
 
 - Make the DLL truly platform agnostic
     - math.h: present for trig functions