From 31a1bb9ca209cc554704597d05bbb4b6aa99141f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian.droege@collabora.co.uk>
Date: Fri, 17 Apr 2009 16:41:00 +0200
Subject: [PATCH] Add utility to automatically generate a static class with
 tags definitions from a C header

---
 parser/Makefile.am                |  9 +++-
 parser/gst-generate-tags.cs       | 85 +++++++++++++++++++++++++++++++
 source/Makefile.am                |  6 ++-
 source/gstreamer-sharp-source.xml |  1 -
 4 files changed, 97 insertions(+), 4 deletions(-)
 create mode 100644 parser/gst-generate-tags.cs

diff --git a/parser/Makefile.am b/parser/Makefile.am
index 55738c4a2a..d7f6acbbbc 100644
--- a/parser/Makefile.am
+++ b/parser/Makefile.am
@@ -1,4 +1,4 @@
-TARGETS = gst-gapi-fixup.exe
+TARGETS = gst-gapi-fixup.exe gst-generate-tags.exe
 DEBUGS = $(addsuffix .mdb, $(TARGETS))
 
 all: $(TARGETS)
@@ -6,11 +6,16 @@ all: $(TARGETS)
 gst-gapi-fixup.exe: $(srcdir)/gst-gapi-fixup.cs
 	$(CSC) -out:$@ $(srcdir)/gst-gapi-fixup.cs
 
+gst-generate-tags.exe: $(srcdir)/gst-generate-tags.cs
+	$(CSC) -out:$@ $(srcdir)/gst-generate-tags.cs
+
+
 noinst_SCRIPTS = $(TARGETS)
 
 CLEANFILES = $(TARGETS) $(DEBUGS)
 MAINTAINERCLEANFILES = Makefile.in
 
 EXTRA_DIST = \
-	gst-gapi-fixup.cs
+	gst-gapi-fixup.cs \
+	gst-generate-tags.cs
 
diff --git a/parser/gst-generate-tags.cs b/parser/gst-generate-tags.cs
new file mode 100644
index 0000000000..2591f93c2c
--- /dev/null
+++ b/parser/gst-generate-tags.cs
@@ -0,0 +1,85 @@
+using System;
+using System.IO;
+
+public class GenerateTags {
+  public static int Main (string[] args) {
+    if (args.Length != 3) {
+      Console.WriteLine ("usage: gst-generate-tags --header=<filename> --namespace=<namespace> --class=<name>");
+      return 1;
+    }
+
+    StreamReader header = null;
+    string ns = "Gst";
+    string cls = "Tags";
+
+    foreach (string arg in args) {
+
+      if (arg.StartsWith ("--header=")) {
+
+        string filename = arg.Substring (9);
+
+        try {
+          header = new StreamReader (filename);
+        } catch (Exception e) {
+          Console.WriteLine ("Invalid header file.");
+          Console.WriteLine (e);
+          return 2;
+        }
+      } else if (arg.StartsWith ("--namespace=")) {
+        ns = arg.Substring (12);
+      } else if (arg.StartsWith ("--class=")) {
+        cls = arg.Substring (8);
+      } else {
+        Console.WriteLine ("Invalid argument '" + arg + "'");
+        return 3;
+      }
+    }
+
+    Console.WriteLine ("namespace " + ns + " {");
+    Console.WriteLine ("\tpublic static class " + cls + " {");
+
+    string line;
+    while ( (line = header.ReadLine ()) != null) {
+      if (!line.StartsWith ("#define GST_TAG_"))
+        continue;
+
+      string tag_name = line.Substring (16);
+      string tag_string = tag_name.Substring (tag_name.IndexOf (' '));
+      tag_name = tag_name.Substring (0, tag_name.IndexOf (' '));
+      if (tag_name.IndexOf ('(') != -1)
+        continue;
+
+      /* FIXME: This is not exactly optimal */
+      tag_name = tag_name.ToLower ();
+      string tag_tmp = new String (new char[] {tag_name[0]}).ToUpper ();
+      for (int i = 1; i < tag_name.Length; i++) {
+        if (tag_name[i-1] == '_') {
+          tag_tmp += (new String (new char[] {tag_name[i]})).ToUpper ();
+        } else {
+          tag_tmp += (new String (new char[] {tag_name[i]}));
+        }
+      }
+      tag_name = tag_tmp;
+      tag_name = tag_name.Replace ("_", String.Empty);
+
+      tag_string = tag_string.Trim ();
+      if (tag_string.IndexOf (' ') != -1)
+        tag_string = tag_string.Substring (0, tag_string.IndexOf (' '));
+      tag_string = tag_string.Trim ();
+      if (tag_string[0] != '"' || tag_string[tag_string.Length-1] != '"') {
+        Console.WriteLine ("Parse error");
+        return 4;
+      }
+      tag_string = tag_string.Substring (1, tag_string.Length - 2);
+
+      Console.WriteLine ("\t\t public const string " + tag_name + " = \"" + tag_string + "\";");
+
+
+    }
+
+    Console.WriteLine ("\t}");
+    Console.WriteLine ("}");
+
+    return 0;
+  }
+}
diff --git a/source/Makefile.am b/source/Makefile.am
index fb2746228b..50fee98208 100644
--- a/source/Makefile.am
+++ b/source/Makefile.am
@@ -2,5 +2,9 @@ MAINTAINERCLEANFILES = Makefile.in
 
 api:
 	$(GAPI_PARSER) gstreamer-sharp-source.xml
-
+	$(MONO) $(top_builddir)/parser/gst-generate-tags.exe \
+		--header=../../gstreamer/gst/gsttaglist.h \
+		--namespace=Gst \
+		--class=Tags \
+		> $(top_srcdir)/gstreamer-sharp/Tags.cs
 
diff --git a/source/gstreamer-sharp-source.xml b/source/gstreamer-sharp-source.xml
index f19bb2b641..17bad99754 100644
--- a/source/gstreamer-sharp-source.xml
+++ b/source/gstreamer-sharp-source.xml
@@ -5,7 +5,6 @@
         <dir>../../gstreamer/gst</dir>
         <!-- Needs to be bound -->
         <exclude>../../gstreamer/gst/gstdebugutils.h</exclude>
-        <exclude>../../gstreamer/gst/gsterror.h</exclude>
         <exclude>../../gstreamer/gst/gstinfo.h</exclude>
         <exclude>../../gstreamer/gst/gstinterface.h</exclude>
         <exclude>../../gstreamer/gst/gsturi.h</exclude>