89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
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/*!
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* @file ResourceLoader.c
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* @brief Helper functions for loading embedded resources.
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*/
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#include <Windows.h>
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#include "common.h"
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/*!
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* @brief Load a resource from the given module as a raw array of bytes.
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* @param hModule Handle to the module containing the resource.
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* @param uResourceId ID of the resource to load.
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* @param lpType The type of resource being loaded.
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* @param pBuffer Pointer to the buffer that will receive the loaded resource.
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* @param pBufferSize Pointer to the variable that will receive the size of \c pBuffer.
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* @returns Indication of success or failure.
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*/
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DWORD resource_extract_raw(HMODULE hModule, UINT uResourceId, LPCSTR lpType, LPBYTE* pBuffer, LPDWORD pBufferSize)
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{
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DWORD dwResult = FALSE;
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DWORD dwResourceSize = 0;
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LPBYTE pResource = NULL;
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HRSRC hResource = NULL;
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HGLOBAL hResData = NULL;
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LPVOID lpResData = NULL;
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*pBuffer = NULL;
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*pBufferSize = 0;
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do
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{
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if ((hResource = FindResourceA(hModule, MAKEINTRESOURCEA(uResourceId), lpType)) == NULL) {
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dwResult = GetLastError();
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dprintf("[RES] Unable to find resource %d type %s", uResourceId, lpType);
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break;
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}
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if ((dwResourceSize = SizeofResource(hModule, hResource)) == 0) {
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dwResult = GetLastError();
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dprintf("[RES] Unable to find resource size for %d type %s", uResourceId, lpType);
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break;
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}
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if ((pResource = (LPBYTE)malloc(dwResourceSize)) == NULL) {
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dwResult = ERROR_NOT_ENOUGH_MEMORY;
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dprintf("[RES] Unable to allocate memory for resource %d type %s size %u", uResourceId, lpType, dwResourceSize);
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break;
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}
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if ((hResData = LoadResource(hModule, hResource)) == NULL) {
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dwResult = GetLastError();
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dprintf("[RES] Unable to load resource for %d type %s", uResourceId, lpType);
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break;
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}
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if ((lpResData = LockResource(hResData)) == NULL) {
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dwResult = GetLastError();
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dprintf("[RES] Unable to lock resource for %d type %s", uResourceId, lpType);
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break;
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}
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memcpy_s(pResource, dwResourceSize, lpResData, dwResourceSize);
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// Locked resource don't need to be unlocked. If we get here, we've won!
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dwResult = ERROR_SUCCESS;
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*pBuffer = lpResData;
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*pBufferSize = dwResourceSize;
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} while (0);
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if (dwResult != ERROR_SUCCESS && pResource != NULL) {
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free(pResource);
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}
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return dwResult;
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}
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/*!
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* @brief Free up memory that was allocated when loading the resource.
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* @param lpBuffer Pointer to the allocated buffer.
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* @returns \c ERROR_SUCCESS
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*/
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DWORD resource_destroy(LPBYTE lpBuffer)
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{
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if (lpBuffer != NULL)
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{
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free(lpBuffer);
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}
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return ERROR_SUCCESS;
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}
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