The GtkRadiant sources as originally released under the GPL license.

libs/shaderlib.h

@@ -0,0 +1,95 @@
+/*
+Copyright (C) 2001-2006, William Joseph.
+All Rights Reserved.
+
+This file is part of GtkRadiant.
+
+GtkRadiant is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+GtkRadiant is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GtkRadiant; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#if !defined (INCLUDED_SHADERLIB_H)
+#define INCLUDED_SHADERLIB_H
+
+#include "string/string.h"
+#include "character.h"
+#include "ishaders.h"
+
+inline bool shader_equal(const char* shader, const char* other)
+{
+  return string_equal_nocase(shader, other);
+}
+
+inline bool shader_equal_n(const char* shader, const char* other, std::size_t n)
+{
+  return string_equal_nocase_n(shader, other, n);
+}
+
+inline bool shader_less(const char* shader, const char* other)
+{
+  return string_less_nocase(shader, other);
+}
+
+inline bool shader_equal_prefix(const char* string, const char* prefix)
+{
+  return shader_equal_n(string, prefix, string_length(prefix));
+}
+
+class shader_less_t
+{
+public:
+  bool operator()(const CopiedString& shader, const CopiedString& other) const
+  {
+    return shader_less(shader.c_str(), other.c_str());
+  }
+};
+
+inline bool shader_valid(const char* shader)
+{
+  return string_is_ascii(shader)
+    && strchr(shader, ' ') == 0
+    && strchr(shader, '\n') == 0
+    && strchr(shader, '\r') == 0
+    && strchr(shader, '\t') == 0
+    && strchr(shader, '\v') == 0
+    && strchr(shader, '\\') == 0;
+}
+
+inline const char* GlobalTexturePrefix_get()
+{
+  return GlobalShaderSystem().getTexturePrefix();
+}
+
+inline bool shader_is_texture(const char* name)
+{
+  return shader_equal_prefix(name, GlobalTexturePrefix_get());
+}
+
+inline const char* shader_get_textureName(const char* name)
+{
+  return name + string_length(GlobalTexturePrefix_get());
+}
+
+inline bool texdef_name_valid(const char* name)
+{
+  return shader_valid(name) && shader_is_texture(name);
+}
+
+inline const char* texdef_name_default()
+{
+  return GlobalTexturePrefix_get();
+}
+
+
+#endif