add c wrapper for standalone ResourceLimits and remove that dependency from glslang_c_interface

StandAlone/CMakeLists.txt

 add_library(glslang-default-resource-limits
-            ${CMAKE_CURRENT_SOURCE_DIR}/ResourceLimits.cpp)
+            ${CMAKE_CURRENT_SOURCE_DIR}/ResourceLimits.cpp
+            ${CMAKE_CURRENT_SOURCE_DIR}/resource_limits_c.cpp)
 set_property(TARGET glslang-default-resource-limits PROPERTY FOLDER glslang)
 set_property(TARGET glslang-default-resource-limits PROPERTY POSITION_INDEPENDENT_CODE ON)
 

StandAlone/resource_limits_c.cpp

+/**
+BSD 2-Clause License
+
+Copyright (c) 2020, Travis Fort
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**/
+
+#include "resource_limits_c.h"
+#include "ResourceLimits.h"
+#include <stdlib.h>
+#include <string>
+
+const glslang_resource_t* glslang_default_resource(void)
+{
+    return reinterpret_cast<const glslang_resource_t*>(&glslang::DefaultTBuiltInResource);
+}
+
+const char* glslang_default_resource_string()
+{
+    std::string cpp_str = glslang::GetDefaultTBuiltInResourceString();
+    char* c_str = (char*)malloc(cpp_str.length() + 1);
+    strcpy(c_str, cpp_str.c_str());
+    return c_str;
+}
+
+void glslang_decode_resource_limits(glslang_resource_t* resources, char* config)
+{
+    glslang::DecodeResourceLimits(reinterpret_cast<TBuiltInResource*>(resources), config);
+}

StandAlone/resource_limits_c.h

+/**
+BSD 2-Clause License
+
+Copyright (c) 2020, Travis Fort
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**/
+
+#ifndef _STAND_ALONE_RESOURCE_LIMITS_C_INCLUDED_
+#define _STAND_ALONE_RESOURCE_LIMITS_C_INCLUDED_
+
+#include "../glslang/Include/glslang_c_interface.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// These are the default resources for TBuiltInResources, used for both
+//  - parsing this string for the case where the user didn't supply one,
+//  - dumping out a template for user construction of a config file.
+const glslang_resource_t* glslang_default_resource(void);
+
+// Returns the DefaultTBuiltInResource as a human-readable string.
+// NOTE: User is responsible for freeing this string.
+const char* glslang_default_resource_string();
+
+// Decodes the resource limits from |config| to |resources|.
+void glslang_decode_resource_limits(glslang_resource_t* resources, char* config);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _STAND_ALONE_RESOURCE_LIMITS_C_INCLUDED_

glslang/CInterface/glslang_c_interface.cpp

@@ -167,11 +167,6 @@ int glslang_initialize_process() { return static_cast<int>(glslang::InitializePr
 
 void glslang_finalize_process() { glslang::FinalizeProcess(); }
 
-const glslang_resource_t* glslang_default_resource(void)
-{
-    return reinterpret_cast<const glslang_resource_t*>(&glslang::DefaultTBuiltInResource);
-}
-
 static EShLanguage c_shader_stage(glslang_stage_t stage)
 {
     switch (stage) {

glslang/Include/glslang_c_interface.h

@@ -205,8 +205,6 @@ extern "C" {
 int glslang_initialize_process();
 void glslang_finalize_process();
 
-const glslang_resource_t* glslang_default_resource(void);
-
 glslang_shader_t* glslang_shader_create(const glslang_input_t* input);
 void glslang_shader_delete(glslang_shader_t* shader);
 int glslang_shader_preprocess(glslang_shader_t* shader, const glslang_input_t* input);