void* freerdp_load_dynamic_addin(LPCSTR pszFileName, LPCSTR pszPath, LPCSTR pszEntryName)
{
void* entry;
BOOL bHasExt;
PCSTR pszExt;
size_t cchExt;
HINSTANCE library;
size_t cchFileName;
LPSTR pszFilePath;
size_t cchFilePath;
LPSTR pszAddinFile;
size_t cchAddinFile;
LPSTR pszAddinInstallPath;
size_t cchAddinInstallPath;
entry = NULL;
cchExt = 0;
bHasExt = TRUE;
cchFileName = strlen(pszFileName);
if (PathCchFindExtensionA(pszFileName, cchFileName + 1, &pszExt) != S_OK)
{
pszExt = PathGetSharedLibraryExtensionA(PATH_SHARED_LIB_EXT_WITH_DOT);
cchExt = strlen(pszExt);
bHasExt = FALSE;
}
pszAddinInstallPath = freerdp_get_dynamic_addin_install_path();
cchAddinInstallPath = strlen(pszAddinInstallPath);
cchFilePath = cchAddinInstallPath + cchFileName + 32;
pszFilePath = (LPSTR) malloc(cchFilePath + 1);
if (bHasExt)
{
pszAddinFile = _strdup(pszFileName);
cchAddinFile = strlen(pszAddinFile);
}
else
{
cchAddinFile = cchFileName + cchExt + 2;
pszAddinFile = (LPSTR) malloc(cchAddinFile + 1);
sprintf_s(pszAddinFile, cchAddinFile, "%s%s", pszFileName, pszExt);
cchAddinFile = strlen(pszAddinFile);
}
CopyMemory(pszFilePath, pszAddinInstallPath, cchAddinInstallPath);
pszFilePath[cchAddinInstallPath] = '\0';
NativePathCchAppendA((LPSTR) pszFilePath, cchFilePath + 1, pszAddinFile);
library = LoadLibraryA(pszFilePath);
free(pszAddinInstallPath);
free(pszAddinFile);
free(pszFilePath);
if (!library)
return NULL;
entry = GetProcAddress(library, pszEntryName);
if (entry)
return entry;
FreeLibrary(library);
return entry;
}
PVIRTUALCHANNELENTRY freerdp_load_dynamic_addin(LPCSTR pszFileName,
LPCSTR pszPath, LPCSTR pszEntryName)
{
LPSTR pszAddinInstallPath = freerdp_get_dynamic_addin_install_path();
PVIRTUALCHANNELENTRY entry = NULL;
BOOL bHasExt = TRUE;
PCSTR pszExt;
size_t cchExt = 0;
HINSTANCE library = NULL;
size_t cchFileName;
size_t cchFilePath;
LPSTR pszAddinFile = NULL;
LPSTR pszFilePath = NULL;
LPSTR pszRelativeFilePath = NULL;
size_t cchAddinFile;
size_t cchAddinInstallPath;
if (!pszFileName || !pszEntryName)
goto fail;
cchFileName = strlen(pszFileName);
/* Get file name with prefix and extension */
if (FAILED(PathCchFindExtensionA(pszFileName, cchFileName + 1, &pszExt)))
{
pszExt = PathGetSharedLibraryExtensionA(PATH_SHARED_LIB_EXT_WITH_DOT);
cchExt = strlen(pszExt);
bHasExt = FALSE;
}
if (bHasExt)
{
pszAddinFile = _strdup(pszFileName);
if (!pszAddinFile)
goto fail;
}
else
{
cchAddinFile = cchFileName + cchExt + 2 + sizeof(FREERDP_SHARED_LIBRARY_PREFIX);
pszAddinFile = (LPSTR) malloc(cchAddinFile + 1);
if (!pszAddinFile)
goto fail;
sprintf_s(pszAddinFile, cchAddinFile, FREERDP_SHARED_LIBRARY_PREFIX"%s%s",
pszFileName, pszExt);
}
cchAddinFile = strlen(pszAddinFile);
/* If a path is provided prefix the library name with it. */
if (pszPath)
{
size_t relPathLen = strlen(pszPath) + cchAddinFile + 1;
pszRelativeFilePath = calloc(relPathLen, sizeof(CHAR));
if (!pszRelativeFilePath)
goto fail;
sprintf_s(pszRelativeFilePath, relPathLen, "%s", pszRelativeFilePath);
NativePathCchAppendA(pszRelativeFilePath, relPathLen, pszAddinFile);
}
else
pszRelativeFilePath = _strdup(pszAddinFile);
if (!pszRelativeFilePath)
goto fail;
/* If a system prefix path is provided try these locations too. */
if (pszAddinInstallPath)
{
cchAddinInstallPath = strlen(pszAddinInstallPath);
cchFilePath = cchAddinInstallPath + cchFileName + 32;
pszFilePath = (LPSTR) malloc(cchFilePath + 1);
if (!pszFilePath)
goto fail;
CopyMemory(pszFilePath, pszAddinInstallPath, cchAddinInstallPath);
pszFilePath[cchAddinInstallPath] = '\0';
NativePathCchAppendA((LPSTR) pszFilePath, cchFilePath + 1, pszRelativeFilePath);
}
else
pszFilePath = _strdup(pszRelativeFilePath);
library = LoadLibraryA(pszFilePath);
if (!library)
goto fail;
entry = (PVIRTUALCHANNELENTRY)GetProcAddress(library, pszEntryName);
fail:
free(pszRelativeFilePath);
free(pszAddinFile);
free(pszFilePath);
free(pszAddinInstallPath);
if (!entry && library)
FreeLibrary(library);
return entry;
}
