/*
 *
 * Copyright (c) 2015 The Khronos Group Inc.
 * Copyright (c) 2015 Valve Corporation
 * Copyright (c) 2015 LunarG, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Author: Jon Ashburn <jon@lunarg.com>
 */

#include <string.h>
#include "debug_utils.h"
#include "wsi.h"

static inline void *trampolineGetProcAddr(struct loader_instance *inst, const char *funcName) {
    // Don't include or check global functions
    if (!strcmp(funcName, "vkGetInstanceProcAddr")) return (PFN_vkVoidFunction)vkGetInstanceProcAddr;
    if (!strcmp(funcName, "vkDestroyInstance")) return (PFN_vkVoidFunction)vkDestroyInstance;
    if (!strcmp(funcName, "vkEnumeratePhysicalDevices")) return (PFN_vkVoidFunction)vkEnumeratePhysicalDevices;
    if (!strcmp(funcName, "vkGetPhysicalDeviceFeatures")) return (PFN_vkVoidFunction)vkGetPhysicalDeviceFeatures;
    if (!strcmp(funcName, "vkGetPhysicalDeviceFormatProperties")) return (PFN_vkVoidFunction)vkGetPhysicalDeviceFormatProperties;
    if (!strcmp(funcName, "vkGetPhysicalDeviceImageFormatProperties"))
        return (PFN_vkVoidFunction)vkGetPhysicalDeviceImageFormatProperties;
    if (!strcmp(funcName, "vkGetPhysicalDeviceSparseImageFormatProperties"))
        return (PFN_vkVoidFunction)vkGetPhysicalDeviceSparseImageFormatProperties;
    if (!strcmp(funcName, "vkGetPhysicalDeviceProperties")) return (PFN_vkVoidFunction)vkGetPhysicalDeviceProperties;
    if (!strcmp(funcName, "vkGetPhysicalDeviceQueueFamilyProperties"))
        return (PFN_vkVoidFunction)vkGetPhysicalDeviceQueueFamilyProperties;
    if (!strcmp(funcName, "vkGetPhysicalDeviceMemoryProperties")) return (PFN_vkVoidFunction)vkGetPhysicalDeviceMemoryProperties;
    if (!strcmp(funcName, "vkEnumerateDeviceLayerProperties")) return (PFN_vkVoidFunction)vkEnumerateDeviceLayerProperties;
    if (!strcmp(funcName, "vkEnumerateDeviceExtensionProperties")) return (PFN_vkVoidFunction)vkEnumerateDeviceExtensionProperties;
    if (!strcmp(funcName, "vkCreateDevice")) return (PFN_vkVoidFunction)vkCreateDevice;
    if (!strcmp(funcName, "vkGetDeviceProcAddr")) return (PFN_vkVoidFunction)vkGetDeviceProcAddr;
    if (!strcmp(funcName, "vkDestroyDevice")) return (PFN_vkVoidFunction)vkDestroyDevice;
    if (!strcmp(funcName, "vkGetDeviceQueue")) return (PFN_vkVoidFunction)vkGetDeviceQueue;
    if (!strcmp(funcName, "vkQueueSubmit")) return (PFN_vkVoidFunction)vkQueueSubmit;
    if (!strcmp(funcName, "vkQueueWaitIdle")) return (PFN_vkVoidFunction)vkQueueWaitIdle;
    if (!strcmp(funcName, "vkDeviceWaitIdle")) return (PFN_vkVoidFunction)vkDeviceWaitIdle;
    if (!strcmp(funcName, "vkAllocateMemory")) return (PFN_vkVoidFunction)vkAllocateMemory;
    if (!strcmp(funcName, "vkFreeMemory")) return (PFN_vkVoidFunction)vkFreeMemory;
    if (!strcmp(funcName, "vkMapMemory")) return (PFN_vkVoidFunction)vkMapMemory;
    if (!strcmp(funcName, "vkUnmapMemory")) return (PFN_vkVoidFunction)vkUnmapMemory;
    if (!strcmp(funcName, "vkFlushMappedMemoryRanges")) return (PFN_vkVoidFunction)vkFlushMappedMemoryRanges;
    if (!strcmp(funcName, "vkInvalidateMappedMemoryRanges")) return (PFN_vkVoidFunction)vkInvalidateMappedMemoryRanges;
    if (!strcmp(funcName, "vkGetDeviceMemoryCommitment")) return (PFN_vkVoidFunction)vkGetDeviceMemoryCommitment;
    if (!strcmp(funcName, "vkGetImageSparseMemoryRequirements")) return (PFN_vkVoidFunction)vkGetImageSparseMemoryRequirements;
    if (!strcmp(funcName, "vkGetImageMemoryRequirements")) return (PFN_vkVoidFunction)vkGetImageMemoryRequirements;
    if (!strcmp(funcName, "vkGetBufferMemoryRequirements")) return (PFN_vkVoidFunction)vkGetBufferMemoryRequirements;
    if (!strcmp(funcName, "vkBindImageMemory")) return (PFN_vkVoidFunction)vkBindImageMemory;
    if (!strcmp(funcName, "vkBindBufferMemory")) return (PFN_vkVoidFunction)vkBindBufferMemory;
    if (!strcmp(funcName, "vkQueueBindSparse")) return (PFN_vkVoidFunction)vkQueueBindSparse;
    if (!strcmp(funcName, "vkCreateFence")) return (PFN_vkVoidFunction)vkCreateFence;
    if (!strcmp(funcName, "vkDestroyFence")) return (PFN_vkVoidFunction)vkDestroyFence;
    if (!strcmp(funcName, "vkGetFenceStatus")) return (PFN_vkVoidFunction)vkGetFenceStatus;
    if (!strcmp(funcName, "vkResetFences")) return (PFN_vkVoidFunction)vkResetFences;
    if (!strcmp(funcName, "vkWaitForFences")) return (PFN_vkVoidFunction)vkWaitForFences;
    if (!strcmp(funcName, "vkCreateSemaphore")) return (PFN_vkVoidFunction)vkCreateSemaphore;
    if (!strcmp(funcName, "vkDestroySemaphore")) return (PFN_vkVoidFunction)vkDestroySemaphore;
    if (!strcmp(funcName, "vkCreateEvent")) return (PFN_vkVoidFunction)vkCreateEvent;
    if (!strcmp(funcName, "vkDestroyEvent")) return (PFN_vkVoidFunction)vkDestroyEvent;
    if (!strcmp(funcName, "vkGetEventStatus")) return (PFN_vkVoidFunction)vkGetEventStatus;
    if (!strcmp(funcName, "vkSetEvent")) return (PFN_vkVoidFunction)vkSetEvent;
    if (!strcmp(funcName, "vkResetEvent")) return (PFN_vkVoidFunction)vkResetEvent;
    if (!strcmp(funcName, "vkCreateQueryPool")) return (PFN_vkVoidFunction)vkCreateQueryPool;
    if (!strcmp(funcName, "vkDestroyQueryPool")) return (PFN_vkVoidFunction)vkDestroyQueryPool;
    if (!strcmp(funcName, "vkGetQueryPoolResults")) return (PFN_vkVoidFunction)vkGetQueryPoolResults;
    if (!strcmp(funcName, "vkCreateBuffer")) return (PFN_vkVoidFunction)vkCreateBuffer;
    if (!strcmp(funcName, "vkDestroyBuffer")) return (PFN_vkVoidFunction)vkDestroyBuffer;
    if (!strcmp(funcName, "vkCreateBufferView")) return (PFN_vkVoidFunction)vkCreateBufferView;
    if (!strcmp(funcName, "vkDestroyBufferView")) return (PFN_vkVoidFunction)vkDestroyBufferView;
    if (!strcmp(funcName, "vkCreateImage")) return (PFN_vkVoidFunction)vkCreateImage;
    if (!strcmp(funcName, "vkDestroyImage")) return (PFN_vkVoidFunction)vkDestroyImage;
    if (!strcmp(funcName, "vkGetImageSubresourceLayout")) return (PFN_vkVoidFunction)vkGetImageSubresourceLayout;
    if (!strcmp(funcName, "vkCreateImageView")) return (PFN_vkVoidFunction)vkCreateImageView;
    if (!strcmp(funcName, "vkDestroyImageView")) return (PFN_vkVoidFunction)vkDestroyImageView;
    if (!strcmp(funcName, "vkCreateShaderModule")) return (PFN_vkVoidFunction)vkCreateShaderModule;
    if (!strcmp(funcName, "vkDestroyShaderModule")) return (PFN_vkVoidFunction)vkDestroyShaderModule;
    if (!strcmp(funcName, "vkCreatePipelineCache")) return (PFN_vkVoidFunction)vkCreatePipelineCache;
    if (!strcmp(funcName, "vkDestroyPipelineCache")) return (PFN_vkVoidFunction)vkDestroyPipelineCache;
    if (!strcmp(funcName, "vkGetPipelineCacheData")) return (PFN_vkVoidFunction)vkGetPipelineCacheData;
    if (!strcmp(funcName, "vkMergePipelineCaches")) return (PFN_vkVoidFunction)vkMergePipelineCaches;
    if (!strcmp(funcName, "vkCreateGraphicsPipelines")) return (PFN_vkVoidFunction)vkCreateGraphicsPipelines;
    if (!strcmp(funcName, "vkCreateComputePipelines")) return (PFN_vkVoidFunction)vkCreateComputePipelines;
    if (!strcmp(funcName, "vkDestroyPipeline")) return (PFN_vkVoidFunction)vkDestroyPipeline;
    if (!strcmp(funcName, "vkCreatePipelineLayout")) return (PFN_vkVoidFunction)vkCreatePipelineLayout;
    if (!strcmp(funcName, "vkDestroyPipelineLayout")) return (PFN_vkVoidFunction)vkDestroyPipelineLayout;
    if (!strcmp(funcName, "vkCreateSampler")) return (PFN_vkVoidFunction)vkCreateSampler;
    if (!strcmp(funcName, "vkDestroySampler")) return (PFN_vkVoidFunction)vkDestroySampler;
    if (!strcmp(funcName, "vkCreateDescriptorSetLayout")) return (PFN_vkVoidFunction)vkCreateDescriptorSetLayout;
    if (!strcmp(funcName, "vkDestroyDescriptorSetLayout")) return (PFN_vkVoidFunction)vkDestroyDescriptorSetLayout;
    if (!strcmp(funcName, "vkCreateDescriptorPool")) return (PFN_vkVoidFunction)vkCreateDescriptorPool;
    if (!strcmp(funcName, "vkDestroyDescriptorPool")) return (PFN_vkVoidFunction)vkDestroyDescriptorPool;
    if (!strcmp(funcName, "vkResetDescriptorPool")) return (PFN_vkVoidFunction)vkResetDescriptorPool;
    if (!strcmp(funcName, "vkAllocateDescriptorSets")) return (PFN_vkVoidFunction)vkAllocateDescriptorSets;
    if (!strcmp(funcName, "vkFreeDescriptorSets")) return (PFN_vkVoidFunction)vkFreeDescriptorSets;
    if (!strcmp(funcName, "vkUpdateDescriptorSets")) return (PFN_vkVoidFunction)vkUpdateDescriptorSets;
    if (!strcmp(funcName, "vkCreateFramebuffer")) return (PFN_vkVoidFunction)vkCreateFramebuffer;
    if (!strcmp(funcName, "vkDestroyFramebuffer")) return (PFN_vkVoidFunction)vkDestroyFramebuffer;
    if (!strcmp(funcName, "vkCreateRenderPass")) return (PFN_vkVoidFunction)vkCreateRenderPass;
    if (!strcmp(funcName, "vkDestroyRenderPass")) return (PFN_vkVoidFunction)vkDestroyRenderPass;
    if (!strcmp(funcName, "vkGetRenderAreaGranularity")) return (PFN_vkVoidFunction)vkGetRenderAreaGranularity;
    if (!strcmp(funcName, "vkCreateCommandPool")) return (PFN_vkVoidFunction)vkCreateCommandPool;
    if (!strcmp(funcName, "vkDestroyCommandPool")) return (PFN_vkVoidFunction)vkDestroyCommandPool;
    if (!strcmp(funcName, "vkResetCommandPool")) return (PFN_vkVoidFunction)vkResetCommandPool;
    if (!strcmp(funcName, "vkAllocateCommandBuffers")) return (PFN_vkVoidFunction)vkAllocateCommandBuffers;
    if (!strcmp(funcName, "vkFreeCommandBuffers")) return (PFN_vkVoidFunction)vkFreeCommandBuffers;
    if (!strcmp(funcName, "vkBeginCommandBuffer")) return (PFN_vkVoidFunction)vkBeginCommandBuffer;
    if (!strcmp(funcName, "vkEndCommandBuffer")) return (PFN_vkVoidFunction)vkEndCommandBuffer;
    if (!strcmp(funcName, "vkResetCommandBuffer")) return (PFN_vkVoidFunction)vkResetCommandBuffer;
    if (!strcmp(funcName, "vkCmdBindPipeline")) return (PFN_vkVoidFunction)vkCmdBindPipeline;
    if (!strcmp(funcName, "vkCmdBindDescriptorSets")) return (PFN_vkVoidFunction)vkCmdBindDescriptorSets;
    if (!strcmp(funcName, "vkCmdBindVertexBuffers")) return (PFN_vkVoidFunction)vkCmdBindVertexBuffers;
    if (!strcmp(funcName, "vkCmdBindIndexBuffer")) return (PFN_vkVoidFunction)vkCmdBindIndexBuffer;
    if (!strcmp(funcName, "vkCmdSetViewport")) return (PFN_vkVoidFunction)vkCmdSetViewport;
    if (!strcmp(funcName, "vkCmdSetScissor")) return (PFN_vkVoidFunction)vkCmdSetScissor;
    if (!strcmp(funcName, "vkCmdSetLineWidth")) return (PFN_vkVoidFunction)vkCmdSetLineWidth;
    if (!strcmp(funcName, "vkCmdSetDepthBias")) return (PFN_vkVoidFunction)vkCmdSetDepthBias;
    if (!strcmp(funcName, "vkCmdSetBlendConstants")) return (PFN_vkVoidFunction)vkCmdSetBlendConstants;
    if (!strcmp(funcName, "vkCmdSetDepthBounds")) return (PFN_vkVoidFunction)vkCmdSetDepthBounds;
    if (!strcmp(funcName, "vkCmdSetStencilCompareMask")) return (PFN_vkVoidFunction)vkCmdSetStencilCompareMask;
    if (!strcmp(funcName, "vkCmdSetStencilWriteMask")) return (PFN_vkVoidFunction)vkCmdSetStencilWriteMask;
    if (!strcmp(funcName, "vkCmdSetStencilReference")) return (PFN_vkVoidFunction)vkCmdSetStencilReference;
    if (!strcmp(funcName, "vkCmdDraw")) return (PFN_vkVoidFunction)vkCmdDraw;
    if (!strcmp(funcName, "vkCmdDrawIndexed")) return (PFN_vkVoidFunction)vkCmdDrawIndexed;
    if (!strcmp(funcName, "vkCmdDrawIndirect")) return (PFN_vkVoidFunction)vkCmdDrawIndirect;
    if (!strcmp(funcName, "vkCmdDrawIndexedIndirect")) return (PFN_vkVoidFunction)vkCmdDrawIndexedIndirect;
    if (!strcmp(funcName, "vkCmdDispatch")) return (PFN_vkVoidFunction)vkCmdDispatch;
    if (!strcmp(funcName, "vkCmdDispatchIndirect")) return (PFN_vkVoidFunction)vkCmdDispatchIndirect;
    if (!strcmp(funcName, "vkCmdCopyBuffer")) return (PFN_vkVoidFunction)vkCmdCopyBuffer;
    if (!strcmp(funcName, "vkCmdCopyImage")) return (PFN_vkVoidFunction)vkCmdCopyImage;
    if (!strcmp(funcName, "vkCmdBlitImage")) return (PFN_vkVoidFunction)vkCmdBlitImage;
    if (!strcmp(funcName, "vkCmdCopyBufferToImage")) return (PFN_vkVoidFunction)vkCmdCopyBufferToImage;
    if (!strcmp(funcName, "vkCmdCopyImageToBuffer")) return (PFN_vkVoidFunction)vkCmdCopyImageToBuffer;
    if (!strcmp(funcName, "vkCmdUpdateBuffer")) return (PFN_vkVoidFunction)vkCmdUpdateBuffer;
    if (!strcmp(funcName, "vkCmdFillBuffer")) return (PFN_vkVoidFunction)vkCmdFillBuffer;
    if (!strcmp(funcName, "vkCmdClearColorImage")) return (PFN_vkVoidFunction)vkCmdClearColorImage;
    if (!strcmp(funcName, "vkCmdClearDepthStencilImage")) return (PFN_vkVoidFunction)vkCmdClearDepthStencilImage;
    if (!strcmp(funcName, "vkCmdClearAttachments")) return (PFN_vkVoidFunction)vkCmdClearAttachments;
    if (!strcmp(funcName, "vkCmdResolveImage")) return (PFN_vkVoidFunction)vkCmdResolveImage;
    if (!strcmp(funcName, "vkCmdSetEvent")) return (PFN_vkVoidFunction)vkCmdSetEvent;
    if (!strcmp(funcName, "vkCmdResetEvent")) return (PFN_vkVoidFunction)vkCmdResetEvent;
    if (!strcmp(funcName, "vkCmdWaitEvents")) return (PFN_vkVoidFunction)vkCmdWaitEvents;
    if (!strcmp(funcName, "vkCmdPipelineBarrier")) return (PFN_vkVoidFunction)vkCmdPipelineBarrier;
    if (!strcmp(funcName, "vkCmdBeginQuery")) return (PFN_vkVoidFunction)vkCmdBeginQuery;
    if (!strcmp(funcName, "vkCmdEndQuery")) return (PFN_vkVoidFunction)vkCmdEndQuery;
    if (!strcmp(funcName, "vkCmdResetQueryPool")) return (PFN_vkVoidFunction)vkCmdResetQueryPool;
    if (!strcmp(funcName, "vkCmdWriteTimestamp")) return (PFN_vkVoidFunction)vkCmdWriteTimestamp;
    if (!strcmp(funcName, "vkCmdCopyQueryPoolResults")) return (PFN_vkVoidFunction)vkCmdCopyQueryPoolResults;
    if (!strcmp(funcName, "vkCmdPushConstants")) return (PFN_vkVoidFunction)vkCmdPushConstants;
    if (!strcmp(funcName, "vkCmdBeginRenderPass")) return (PFN_vkVoidFunction)vkCmdBeginRenderPass;
    if (!strcmp(funcName, "vkCmdNextSubpass")) return (PFN_vkVoidFunction)vkCmdNextSubpass;
    if (!strcmp(funcName, "vkCmdEndRenderPass")) return (PFN_vkVoidFunction)vkCmdEndRenderPass;
    if (!strcmp(funcName, "vkCmdExecuteCommands")) return (PFN_vkVoidFunction)vkCmdExecuteCommands;

    // Core 1.1 functions
    if (!strcmp(funcName, "vkEnumeratePhysicalDeviceGroups")) return (PFN_vkVoidFunction)vkEnumeratePhysicalDeviceGroups;
    if (!strcmp(funcName, "vkGetPhysicalDeviceFeatures2")) return (PFN_vkVoidFunction)vkGetPhysicalDeviceFeatures2;
    if (!strcmp(funcName, "vkGetPhysicalDeviceProperties2")) return (PFN_vkVoidFunction)vkGetPhysicalDeviceProperties2;
    if (!strcmp(funcName, "vkGetPhysicalDeviceFormatProperties2")) return (PFN_vkVoidFunction)vkGetPhysicalDeviceFormatProperties2;
    if (!strcmp(funcName, "vkGetPhysicalDeviceImageFormatProperties2")) return (PFN_vkVoidFunction)vkGetPhysicalDeviceImageFormatProperties2;
    if (!strcmp(funcName, "vkGetPhysicalDeviceQueueFamilyProperties2")) return (PFN_vkVoidFunction)vkGetPhysicalDeviceQueueFamilyProperties2;
    if (!strcmp(funcName, "vkGetPhysicalDeviceMemoryProperties2")) return (PFN_vkVoidFunction)vkGetPhysicalDeviceMemoryProperties2;
    if (!strcmp(funcName, "vkGetPhysicalDeviceSparseImageFormatProperties2")) return (PFN_vkVoidFunction)vkGetPhysicalDeviceSparseImageFormatProperties2;
    if (!strcmp(funcName, "vkGetPhysicalDeviceExternalBufferProperties")) return (PFN_vkVoidFunction)vkGetPhysicalDeviceExternalBufferProperties;
    if (!strcmp(funcName, "vkGetPhysicalDeviceExternalSemaphoreProperties")) return (PFN_vkVoidFunction)vkGetPhysicalDeviceExternalSemaphoreProperties;
    if (!strcmp(funcName, "vkGetPhysicalDeviceExternalFenceProperties")) return (PFN_vkVoidFunction)vkGetPhysicalDeviceExternalFenceProperties;
    if (!strcmp(funcName, "vkBindBufferMemory2")) return (PFN_vkVoidFunction)vkBindBufferMemory2;
    if (!strcmp(funcName, "vkBindImageMemory2")) return (PFN_vkVoidFunction)vkBindImageMemory2;
    if (!strcmp(funcName, "vkGetDeviceGroupPeerMemoryFeatures")) return (PFN_vkVoidFunction)vkGetDeviceGroupPeerMemoryFeatures;
    if (!strcmp(funcName, "vkCmdSetDeviceMask")) return (PFN_vkVoidFunction)vkCmdSetDeviceMask;
    if (!strcmp(funcName, "vkCmdDispatchBase")) return (PFN_vkVoidFunction)vkCmdDispatchBase;
    if (!strcmp(funcName, "vkGetImageMemoryRequirements2")) return (PFN_vkVoidFunction)vkGetImageMemoryRequirements2;
    if (!strcmp(funcName, "vkTrimCommandPool")) return (PFN_vkVoidFunction)vkTrimCommandPool;
    if (!strcmp(funcName, "vkGetDeviceQueue2")) return (PFN_vkVoidFunction)vkGetDeviceQueue2;
    if (!strcmp(funcName, "vkCreateSamplerYcbcrConversion")) return (PFN_vkVoidFunction)vkCreateSamplerYcbcrConversion;
    if (!strcmp(funcName, "vkDestroySamplerYcbcrConversion")) return (PFN_vkVoidFunction)vkDestroySamplerYcbcrConversion;
    if (!strcmp(funcName, "vkGetDescriptorSetLayoutSupport")) return (PFN_vkVoidFunction)vkGetDescriptorSetLayoutSupport;
    if (!strcmp(funcName, "vkCreateDescriptorUpdateTemplate")) return (PFN_vkCreateDescriptorUpdateTemplate)vkCreateDescriptorUpdateTemplate;
    if (!strcmp(funcName, "vkDestroyDescriptorUpdateTemplate")) return (PFN_vkDestroyDescriptorUpdateTemplate)vkDestroyDescriptorUpdateTemplate;
    if (!strcmp(funcName, "vkUpdateDescriptorSetWithTemplate")) return (PFN_vkUpdateDescriptorSetWithTemplate)vkUpdateDescriptorSetWithTemplate;

    // Instance extensions
    void *addr;
    if (debug_utils_InstanceGpa(inst, funcName, &addr)) return addr;

    if (wsi_swapchain_instance_gpa(inst, funcName, &addr)) return addr;

    if (extension_instance_gpa(inst, funcName, &addr)) return addr;

    // Unknown physical device extensions
    if (loader_phys_dev_ext_gpa(inst, funcName, true, &addr, NULL)) return addr;

    // Unknown device extensions
    addr = loader_dev_ext_gpa(inst, funcName);
    return addr;
}

static inline void *globalGetProcAddr(const char *name) {
    if (!name || name[0] != 'v' || name[1] != 'k') return NULL;

    name += 2;
    if (!strcmp(name, "CreateInstance")) return (void *)vkCreateInstance;
    if (!strcmp(name, "EnumerateInstanceExtensionProperties")) return (void *)vkEnumerateInstanceExtensionProperties;
    if (!strcmp(name, "EnumerateInstanceLayerProperties")) return (void *)vkEnumerateInstanceLayerProperties;
    if (!strcmp(name, "EnumerateInstanceVersion")) return (void *)vkEnumerateInstanceVersion;

    return NULL;
}

static inline void *loader_non_passthrough_gdpa(const char *name) {
    if (!name || name[0] != 'v' || name[1] != 'k') return NULL;

    name += 2;

    if (!strcmp(name, "GetDeviceProcAddr")) return vkGetDeviceProcAddr;
    if (!strcmp(name, "DestroyDevice")) return vkDestroyDevice;
    if (!strcmp(name, "GetDeviceQueue")) return vkGetDeviceQueue;
    if (!strcmp(name, "GetDeviceQueue2")) return vkGetDeviceQueue2;
    if (!strcmp(name, "AllocateCommandBuffers")) return vkAllocateCommandBuffers;

    return NULL;
}