util.h

#pragma once

#include <ctype.h>
#include <wchar.h>
#include <string>
#include <vector>

#include <d3d11_1.h>
#include <dxgi1_2.h>
#include <D3Dcompiler.h>
#include <d3d9.h>
#include <DirectXMath.h>

#include "version.h"
#include "log.h"
#include "crc32c.h"
#include "util_min.h"

#include "D3D_Shaders\stdafx.h"

#include "DirectX11\HookedDevice.h"
#include "DirectX11\HookedContext.h"


// Defines the maximum number of four component ini params we support.
// Potential trade off on flexibility vs overhead, but unless we increase it
// above 256 (4k page) it is unlikely to be significant.
const int INI_PARAMS_SIZE = 8;


// -----------------------------------------------------------------------------------------------

// Create hash code for textures or buffers.  

// Wrapped in try/catch because it can crash in Dirt Rally,
// because of noncontiguous or non-mapped memory for the texture.  Not sure this
// is the best strategy.

// Now switching to use crc32_append instead of fnv_64_buf for performance. This
// implementation of crc32c uses the SSE 4.2 instructions in the CPU to calculate,
// and is some 30x faster than fnv_64_buf.
// 
// Not changing shader hash calculation as there are thousands of shaders already
// in the field, and there is no known bottleneck for that calculation.

static uint32_t crc32c_hw(uint32_t seed, const void *buffer, size_t length)
{
	try
	{
		const uint8_t *cast_buffer = static_cast<const uint8_t*>(buffer);

		return crc32c_append(seed, cast_buffer, length);
	}
	catch (...)
	{
		// Fatal error, but catch it and return null for hash.
		LogInfo("   ******* Exception caught while calculating crc32c_hw hash ****** \n");
		return 0;
	}
}


// -----------------------------------------------------------------------------------------------

// Primary hash calculation for all shader file names.

// 64 bit magic FNV-0 and FNV-1 prime
#define FNV_64_PRIME ((UINT64)0x100000001b3ULL)
static UINT64 fnv_64_buf(const void *buf, size_t len)
{
	UINT64 hval = 0;
	unsigned const char *bp = (unsigned const char *)buf;	/* start of buffer */
	unsigned const char *be = bp + len;		/* beyond end of buffer */

	// FNV-1 hash each octet of the buffer
	while (bp < be)
	{
		// multiply by the 64 bit FNV magic prime mod 2^64 */
		hval *= FNV_64_PRIME;
		// xor the bottom with the current octet
		hval ^= (UINT64)*bp++;
	}
	return hval;
}


// -----------------------------------------------------------------------------------------------

// Strip spaces from the right of a string.
// Returns a pointer to the last non-NULL character of the truncated string.
static char *RightStripA(char *buf)
{
	char *end = buf + strlen(buf) - 1;
	while (end > buf && isspace(*end))
		end--;
	*(end + 1) = 0;
	return end;
}
static wchar_t *RightStripW(wchar_t *buf)
{
	wchar_t *end = buf + wcslen(buf) - 1;
	while (end > buf && iswspace(*end))
		end--;
	*(end + 1) = 0;
	return end;
}

static char *readStringParameter(wchar_t *val)
{
	static char buf[MAX_PATH];
	wcstombs(buf, val, MAX_PATH);
	RightStripA(buf);
	char *start = buf; while (isspace(*start)) start++;
	return start;
}

static void BeepSuccess() 
{
	// High beep for success
	Beep(1800, 400);
}

static void BeepShort() 
{
	// Short High beep
	Beep(1800, 100);
}

static void BeepFailure() 
{
	// Bonk sound for failure.
	Beep(200, 150);
}

static void BeepFailure2() 
{
	// Brnk, dunk sound for failure.
	Beep(300, 200); Beep(200, 150);
}

static void BeepProfileFail()
{
	// Brnk, du-du-dunk sound to signify the profile failed to install.
	// This is more likely to hit than the others for an end user (e.g. if
	// they denied admin privileges), so use a unique tone to make it
	// easier to identify.
	Beep(300, 300);
	Beep(200, 100);
	Beep(200, 100);
	Beep(200, 200);
}

static DECLSPEC_NORETURN void DoubleBeepExit()
{
	// Fatal error somewhere, known to crash, might as well exit cleanly
	// with some notification.
	BeepFailure2();
	Sleep(500);
	BeepFailure2();
	Sleep(200);
	if (LogFile) {
		// Make sure the log is written out so we see the failure message
		fclose(LogFile);
		LogFile = 0;
	}
	ExitProcess(0xc0000135);
}


// -----------------------------------------------------------------------------------------------

// To use this function be sure to terminate an EnumName_t list with {NULL, 0}
// as it cannot use ArraySize on passed in arrays.
template <class T1, class T2>
static T2 lookup_enum_val(struct EnumName_t<T1, T2> *enum_names, T1 name, T2 default)
{
	for (; enum_names->name; enum_names++) {
		if (!_wcsicmp(name, enum_names->name))
			return enum_names->val;
	}

	return default;
}
template <class T1, class T2>
static T1 lookup_enum_name(struct EnumName_t<T1, T2> *enum_names, T2 val)
{
	for (; enum_names->name; enum_names++) {
		if (val == enum_names->val)
			return enum_names->name;
	}

	return NULL;
}

// Parses an option string of names given by enum_names. The enum used with
// this function should have an INVALID=0, other flags declared as powers of
// two, and the SENSIBLE_ENUM macro used to enable the bitwise and logical
// operators. As above, the EnumName_t list must be terminated with {NULL, 0}
//
// If you wish to parse an option string that contains exactly one unrecognised
// argument, provide a pointer to a pointer in the 'unrecognised' field and the
// unrecognised option will be returned. Multiple unrecognised options are
// still considered errors.
template <class T1, class T2>
static T2 parse_enum_option_string(struct EnumName_t<T1, T2> *enum_names, T1 option_string, T1 *unrecognised)
{
	T1 ptr = option_string, cur;
	T2 ret = T2::INVALID;
	T2 tmp = T2::INVALID;

	if (unrecognised)
		*unrecognised = NULL;

	while (*ptr) {
		// Skip over whitespace:
		for (; *ptr == L' '; ptr++) {}

		// Mark start of current entry:
		cur = ptr;

		// Scan until the next whitespace or end of string:
		for (; *ptr && *ptr != L' '; ptr++) {}

		if (*ptr) {
			// NULL terminate the current entry and advance pointer:
			*ptr = L'\0';
			ptr++;
		}

		// Lookup the value of the current entry:
		tmp = lookup_enum_val<T1, T2> (enum_names, cur, T2::INVALID);
		if (tmp == T2::INVALID) {
			if (unrecognised && !(*unrecognised)) {
				*unrecognised = cur;
			} else {
				LogInfoW(L"WARNING: Unknown option: %s\n", cur);
				BeepFailure2();
			}
		}
		ret |= tmp;
	}
	return ret;
}

// http://msdn.microsoft.com/en-us/library/windows/desktop/bb173059(v=vs.85).aspx
static char *DXGIFormats[] = {
	"UNKNOWN",
	"R32G32B32A32_TYPELESS",
	"R32G32B32A32_FLOAT",
	"R32G32B32A32_UINT",
	"R32G32B32A32_SINT",
	"R32G32B32_TYPELESS",
	"R32G32B32_FLOAT",
	"R32G32B32_UINT",
	"R32G32B32_SINT",
	"R16G16B16A16_TYPELESS",
	"R16G16B16A16_FLOAT",
	"R16G16B16A16_UNORM",
	"R16G16B16A16_UINT",
	"R16G16B16A16_SNORM",
	"R16G16B16A16_SINT",
	"R32G32_TYPELESS",
	"R32G32_FLOAT",
	"R32G32_UINT",
	"R32G32_SINT",
	"R32G8X24_TYPELESS",
	"D32_FLOAT_S8X24_UINT",
	"R32_FLOAT_X8X24_TYPELESS",
	"X32_TYPELESS_G8X24_UINT",
	"R10G10B10A2_TYPELESS",
	"R10G10B10A2_UNORM",
	"R10G10B10A2_UINT",
	"R11G11B10_FLOAT",
	"R8G8B8A8_TYPELESS",
	"R8G8B8A8_UNORM",
	"R8G8B8A8_UNORM_SRGB",
	"R8G8B8A8_UINT",
	"R8G8B8A8_SNORM",
	"R8G8B8A8_SINT",
	"R16G16_TYPELESS",
	"R16G16_FLOAT",
	"R16G16_UNORM",
	"R16G16_UINT",
	"R16G16_SNORM",
	"R16G16_SINT",
	"R32_TYPELESS",
	"D32_FLOAT",
	"R32_FLOAT",
	"R32_UINT",
	"R32_SINT",
	"R24G8_TYPELESS",
	"D24_UNORM_S8_UINT",
	"R24_UNORM_X8_TYPELESS",
	"X24_TYPELESS_G8_UINT",
	"R8G8_TYPELESS",
	"R8G8_UNORM",
	"R8G8_UINT",
	"R8G8_SNORM",
	"R8G8_SINT",
	"R16_TYPELESS",
	"R16_FLOAT",
	"D16_UNORM",
	"R16_UNORM",
	"R16_UINT",
	"R16_SNORM",
	"R16_SINT",
	"R8_TYPELESS",
	"R8_UNORM",
	"R8_UINT",
	"R8_SNORM",
	"R8_SINT",
	"A8_UNORM",
	"R1_UNORM",
	"R9G9B9E5_SHAREDEXP",
	"R8G8_B8G8_UNORM",
	"G8R8_G8B8_UNORM",
	"BC1_TYPELESS",
	"BC1_UNORM",
	"BC1_UNORM_SRGB",
	"BC2_TYPELESS",
	"BC2_UNORM",
	"BC2_UNORM_SRGB",
	"BC3_TYPELESS",
	"BC3_UNORM",
	"BC3_UNORM_SRGB",
	"BC4_TYPELESS",
	"BC4_UNORM",
	"BC4_SNORM",
	"BC5_TYPELESS",
	"BC5_UNORM",
	"BC5_SNORM",
	"B5G6R5_UNORM",
	"B5G5R5A1_UNORM",
	"B8G8R8A8_UNORM",
	"B8G8R8X8_UNORM",
	"R10G10B10_XR_BIAS_A2_UNORM",
	"B8G8R8A8_TYPELESS",
	"B8G8R8A8_UNORM_SRGB",
	"B8G8R8X8_TYPELESS",
	"B8G8R8X8_UNORM_SRGB",
	"BC6H_TYPELESS",
	"BC6H_UF16",
	"BC6H_SF16",
	"BC7_TYPELESS",
	"BC7_UNORM",
	"BC7_UNORM_SRGB",
	"AYUV",
	"Y410",
	"Y416",
	"NV12",
	"P010",
	"P016",
	"420_OPAQUE",
	"YUY2",
	"Y210",
	"Y216",
	"NV11",
	"AI44",
	"IA44",
	"P8",
	"A8P8",
	"B4G4R4A4_UNORM"
};

static char *TexFormatStr(unsigned int format)
{
	if (format < sizeof(DXGIFormats) / sizeof(DXGIFormats[0]))
		return DXGIFormats[format];
	return "UNKNOWN";
}

static DXGI_FORMAT ParseFormatString(const wchar_t *wfmt)
{
	size_t num_formats = sizeof(DXGIFormats) / sizeof(DXGIFormats[0]);
	char afmt[30];
	unsigned format;
	int nargs, end;

	// Try parsing format string as decimal:
	nargs = swscanf_s(wfmt, L"%u%n", &format, &end);
	if (nargs == 1 && end == wcslen(wfmt))
		return (DXGI_FORMAT)format;

	if (!_wcsnicmp(wfmt, L"DXGI_FORMAT_", 12))
		wfmt += 12;

	// Look up format string:
	wcstombs(afmt, wfmt, 30);
	afmt[29] = '\0';
	for (format = 0; format < num_formats; format++) {
		if (!_strnicmp(afmt, DXGIFormats[format], 30))
			return (DXGI_FORMAT)format;
	}

	// UNKNOWN/0 is a valid format (e.g. for structured buffers), so return
	// -1 cast to a DXGI_FORMAT to signify an error:
	return (DXGI_FORMAT)-1;
}

// From DirectXTK with extra formats added
static DXGI_FORMAT EnsureNotTypeless( DXGI_FORMAT fmt )
{
    // Assumes UNORM or FLOAT; doesn't use UINT or SINT
    switch( fmt )
    {
    case DXGI_FORMAT_R32G32B32A32_TYPELESS:    return DXGI_FORMAT_R32G32B32A32_FLOAT;
    case DXGI_FORMAT_R32G32B32_TYPELESS:       return DXGI_FORMAT_R32G32B32_FLOAT;
    case DXGI_FORMAT_R16G16B16A16_TYPELESS:    return DXGI_FORMAT_R16G16B16A16_UNORM;
    case DXGI_FORMAT_R32G32_TYPELESS:          return DXGI_FORMAT_R32G32_FLOAT;
    case DXGI_FORMAT_R10G10B10A2_TYPELESS:     return DXGI_FORMAT_R10G10B10A2_UNORM;
    case DXGI_FORMAT_R8G8B8A8_TYPELESS:        return DXGI_FORMAT_R8G8B8A8_UNORM;
    case DXGI_FORMAT_R16G16_TYPELESS:          return DXGI_FORMAT_R16G16_UNORM;
    case DXGI_FORMAT_R32_TYPELESS:             return DXGI_FORMAT_R32_FLOAT;
    case DXGI_FORMAT_R8G8_TYPELESS:            return DXGI_FORMAT_R8G8_UNORM;
    case DXGI_FORMAT_R16_TYPELESS:             return DXGI_FORMAT_R16_UNORM;
    case DXGI_FORMAT_R8_TYPELESS:              return DXGI_FORMAT_R8_UNORM;
    case DXGI_FORMAT_BC1_TYPELESS:             return DXGI_FORMAT_BC1_UNORM;
    case DXGI_FORMAT_BC2_TYPELESS:             return DXGI_FORMAT_BC2_UNORM;
    case DXGI_FORMAT_BC3_TYPELESS:             return DXGI_FORMAT_BC3_UNORM;
    case DXGI_FORMAT_BC4_TYPELESS:             return DXGI_FORMAT_BC4_UNORM;
    case DXGI_FORMAT_BC5_TYPELESS:             return DXGI_FORMAT_BC5_UNORM;
    case DXGI_FORMAT_B8G8R8A8_TYPELESS:        return DXGI_FORMAT_B8G8R8A8_UNORM;
    case DXGI_FORMAT_B8G8R8X8_TYPELESS:        return DXGI_FORMAT_B8G8R8X8_UNORM;
    case DXGI_FORMAT_BC7_TYPELESS:             return DXGI_FORMAT_BC7_UNORM;
// Extra depth/stencil buffer formats not covered in DirectXTK (discards
// stencil buffer to allow binding to a shader resource, alternatively we could
// discard the depth buffer if we ever needed the stencil buffer):
    case DXGI_FORMAT_R32G8X24_TYPELESS:        return DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS;
    case DXGI_FORMAT_R24G8_TYPELESS:           return DXGI_FORMAT_R24_UNORM_X8_TYPELESS;
    default:                                   return fmt;
    }
}

// When logging, it's not very helpful to have long sequences of hex instead of
// the actual names of the objects in question.
// e.g.
// DEFINE_GUID(IID_IDXGIFactory,0x7b7166ec,0x21c7,0x44ae,0xb2,0x1a,0xc9,0xae,0x32,0x1a,0xe3,0x69);
// 

static std::string NameFromIID(IID id)
{
	// Adding every MIDL_INTERFACE from d3d11_1.h to make this reporting complete.
	// Doesn't seem useful to do every object from d3d11.h itself.

	if (__uuidof(IUnknown) == id)
		return "IUnknown";

	if (__uuidof(ID3D11DeviceChild) == id)
		return "ID3D11DeviceChild";
	if (__uuidof(ID3DDeviceContextState) == id)
		return "ID3DDeviceContextState";

	if (__uuidof(IDirect3DDevice9) == id)
		return "IDirect3DDevice9";
	if (__uuidof(ID3D10Device) == id)
		return "ID3D10Device";
	if (__uuidof(ID3D11Device) == id)
		return "ID3D11Device";
	if (__uuidof(ID3D11Device1) == id)
		return "ID3D11Device1";
	//if (__uuidof(ID3D11Device2) == id)  for d3d11_2.h when the time comes
	//	return "ID3D11Device2";

	if (__uuidof(ID3D11DeviceContext) == id)
		return "ID3D11DeviceContext";
	if (__uuidof(ID3D11DeviceContext1) == id)
		return "ID3D11DeviceContext1";
	//if (__uuidof(ID3D11DeviceContext2) == id) for d3d11_2.h when the time comes
	//	return "ID3D11DeviceContext2";

	if (__uuidof(ID3D11InfoQueue) == id)
		return "ID3D11InfoQueue";
	if (__uuidof(ID3DUserDefinedAnnotation) == id)
		return "ID3DUserDefinedAnnotation";

	if (__uuidof(ID3D11BlendState) == id)
		return "ID3D11BlendState";
	if (__uuidof(ID3D11BlendState1) == id)
		return "ID3D11BlendState1";
	if (__uuidof(ID3D11RasterizerState) == id)
		return "ID3D11RasterizerState";
	if (__uuidof(ID3D11RasterizerState1) == id)
		return "ID3D11RasterizerState1";

	if (__uuidof(ID3D11Texture2D) == id)	// Used to fetch backbuffer
		return "ID3D11Texture2D";

	// All the DXGI interfaces from dxgi.h, and dxgi1_2.h

	if (__uuidof(IDXGIObject) == id)
		return "IDXGIObject";
	if (__uuidof(IDXGIDeviceSubObject) == id)
		return "IDXGIDeviceSubObject";

	if (__uuidof(IDXGIFactory) == id)
		return "IDXGIFactory";
	if (__uuidof(IDXGIFactory1) == id)
		return "IDXGIFactory1";
	if (__uuidof(IDXGIFactory2) == id)
		return "IDXGIFactory2";

	if (__uuidof(IDXGIDevice) == id)
		return "IDXGIDevice";
	if (__uuidof(IDXGIDevice1) == id)
		return "IDXGIDevice1";
	if (__uuidof(IDXGIDevice2) == id)
		return "IDXGIDevice2";

	if (__uuidof(IDXGISwapChain) == id)
		return "IDXGISwapChain";
	if (__uuidof(IDXGISwapChain1) == id)
		return "IDXGISwapChain1";

	if (__uuidof(IDXGIAdapter) == id)
		return "IDXGIAdapter";
	if (__uuidof(IDXGIAdapter1) == id)
		return "IDXGIAdapter1";
	if (__uuidof(IDXGIAdapter2) == id)
		return "IDXGIAdapter2";

	if (__uuidof(IDXGIOutputDuplication) == id)
		return "IDXGIOutputDuplication";
	if (__uuidof(IDXGIDisplayControl) == id)
		return "IDXGIDisplayControl";

	if (__uuidof(IDXGIOutput) == id)
		return "IDXGIOutput";
	if (__uuidof(IDXGIOutput1) == id)
		return "IDXGIOutput1";
	if (__uuidof(IDXGIResource) == id)
		return "IDXGIResource";
	if (__uuidof(IDXGIResource1) == id)
		return "IDXGIResource1";
	if (__uuidof(IDXGISurface) == id)
		return "IDXGISurface";
	if (__uuidof(IDXGISurface1) == id)
		return "IDXGIResource";
	if (__uuidof(IDXGISurface2) == id)
		return "IDXGISurface2";
	if (__uuidof(IDXGIKeyedMutex) == id)
		return "IDXGIKeyedMutex";

	// For unknown IIDs lets return the hex string.
	// Converting from wchar_t to string using stackoverflow suggestion.

	std::string iidString;
	wchar_t wiid[128];
	if (SUCCEEDED(StringFromGUID2(id, wiid, 128)))
	{
		std::wstring convert = std::wstring(wiid);
		iidString = std::string(convert.begin(), convert.end());
	}
	else
	{
		iidString = "unknown";
	}

	return iidString;
}

static const char* type_name(IUnknown *object)
{
	ID3D11Device *device;
	ID3D11DeviceContext *context;

	// Seems that not even try / catch is safe in all cases of this
	// (grumble grumble poorly designed grumble...). The only cases where
	// we should be called on an object without type information is while
	// hooking the device and/or context, so check if it is one of those
	// cases:

	device = lookup_hooked_device((ID3D11Device*)object);
	if (device)
		return "Hooked_ID3D11Device";
	context = lookup_hooked_context((ID3D11DeviceContext*)object);
	if (context)
		return "Hooked_ID3D11DeviceContext";

	try {
		return typeid(*object).name();
	} catch (__non_rtti_object) {
		return "<NO_RTTI>";
	} catch(bad_typeid) {
		return "<NULL>";
	}
}


// -----------------------------------------------------------------------------------------------

// Common routine to handle disassembling binary shaders to asm text.
// This is used whenever we need the Asm text.


// New version using Flugan's wrapper around D3DDisassemble to replace the
// problematic %f floating point values with %.9e, which is enough that a 32bit
// floating point value will be reproduced exactly:
static string BinaryToAsmText(const void *pShaderBytecode, size_t BytecodeLength)
{
	string comments;
	vector<byte> byteCode(BytecodeLength);
	vector<byte> disassembly;
	HRESULT r;

	comments = "//   using 3Dmigoto v" + string(VER_FILE_VERSION_STR) + " on " + LogTime() + "//\n";
	memcpy(byteCode.data(), pShaderBytecode, BytecodeLength);

	r = disassembler(&byteCode, &disassembly, comments.c_str());
	if (FAILED(r)) {
		LogInfo("  disassembly failed. Error: %x \n", r);
		return "";
	}

	return string(disassembly.begin(), disassembly.end());
}

// Get the shader model from the binary shader bytecode.
//
// This used to disassemble, then search for the text string, but if we are going to
// do all that work, we might as well use the James-Jones decoder to get it.
// The other reason to do it this way is that we have seen multiple shader versions
// in Unity games, and the old technique of searching for the first uncommented line
// would fail.

// This is an interesting idea, but doesn't work well here because of project structure.
// for the moment, let's leave this here, but use the disassemble search approach.

//static string GetShaderModel(const void *pShaderBytecode)
//{
//	Shader *shader = DecodeDXBC((uint32_t*)pShaderBytecode);
//	if (shader == nullptr)
//		return "";
//
//	string shaderModel;
//	
//	switch (shader->eShaderType)
//	{
//	case PIXEL_SHADER:
//		shaderModel = "ps";
//		break;
//	case VERTEX_SHADER:
//		shaderModel = "vs";
//		break;
//	case GEOMETRY_SHADER:
//		shaderModel = "gs";
//		break;
//	case HULL_SHADER:
//		shaderModel = "hs";
//		break;
//	case DOMAIN_SHADER:
//		shaderModel = "ds";
//		break;
//	case COMPUTE_SHADER:
//		shaderModel = "cs";
//		break;
//	default:
//		return "";		// Failure.
//	}
//
//	shaderModel += "_" + shader->ui32MajorVersion;
//	shaderModel += "_" + shader->ui32MinorVersion;
//
//	delete shader;
//
//	return shaderModel;
//}

static string GetShaderModel(const void *pShaderBytecode, size_t bytecodeLength)
{
	string asmText = BinaryToAsmText(pShaderBytecode, bytecodeLength);
	if (asmText.empty())
		return "";

	// Read shader model. This is the first not commented line.
	char *pos = (char *)asmText.data();
	char *end = pos + asmText.size();
	while (pos[0] == '/' && pos < end)
	{
		while (pos[0] != 0x0a && pos < end) pos++;
		pos++;
	}
	// Extract model.
	char *eol = pos;
	while (eol[0] != 0x0a && pos < end) eol++;
	string shaderModel(pos, eol);

	return shaderModel;
}

// Create a text file containing text for the string specified.  Can be Asm or HLSL.
// If the file already exists and the caller did not specify overwrite (used
// for reassembled text), return that as an error to avoid overwriting previous
// work.

// We previously would overwrite the file only after checking if the contents were different,
// this relaxes that to just being same file name.

static HRESULT CreateTextFile(wchar_t* fullPath, string asmText, bool overwrite)
{
	FILE *f;

	if (!overwrite) {
		_wfopen_s(&f, fullPath, L"rb");
		if (f)
		{
			fclose(f);
			LogInfoW(L"    CreateTextFile error: file already exists %s \n", fullPath);
			return ERROR_FILE_EXISTS;
		}
	}

	_wfopen_s(&f, fullPath, L"wb");
	if (f)
	{
		fwrite(asmText.data(), 1, asmText.size(), f);
		fclose(f);
	}

	return S_OK;
}

// Get shader type from asm, first non-commented line.  CS, PS, VS.
// Not sure this works on weird Unity variant with embedded types.


// Specific variant to name files consistently, so we know they are Asm text.

static HRESULT CreateAsmTextFile(wchar_t* fileDirectory, UINT64 hash, const wchar_t* shaderType, 
	const void *pShaderBytecode, size_t bytecodeLength)
{
	string asmText = BinaryToAsmText(pShaderBytecode, bytecodeLength);
	if (asmText.empty())
	{
		return E_OUTOFMEMORY;
	}

	wchar_t fullPath[MAX_PATH];
	swprintf_s(fullPath, MAX_PATH, L"%ls\\%016llx-%ls.txt", fileDirectory, hash, shaderType);

	HRESULT hr = CreateTextFile(fullPath, asmText, false);

	if (SUCCEEDED(hr))
		LogInfoW(L"    storing disassembly to %s \n", fullPath);
	else
		LogInfoW(L"    error: %x, storing disassembly to %s \n", hr, fullPath);

	return hr;
}

// Specific variant to name files, so we know they are HLSL text.

static HRESULT CreateHLSLTextFile(UINT64 hash, string hlslText)
{

}

// -----------------------------------------------------------------------------------------------

// Parses the name of one of the IniParam constants: x, y, z, w, x1, y1, ..., z7, w7
static bool ParseIniParamName(const wchar_t *name, int *idx, float DirectX::XMFLOAT4::**component)
{
	int ret, len1, len2;
	wchar_t component_chr;
	size_t length = wcslen(name);

	ret = swscanf_s(name, L"%lc%n%u%n", &component_chr, 1, &len1, idx, &len2);

	// May or may not have matched index. Make sure entire string was
	// matched either way and check index is valid if it was matched:
	if (ret == 1 && len1 == length) {
		*idx = 0;
	} else if (ret == 2 && len2 == length) {
		if (*idx >= INI_PARAMS_SIZE)
			return false;
	} else {
		return false;
	}

	switch (component_chr) {
		case L'x':
			*component = &DirectX::XMFLOAT4::x;
			return true;
		case L'y':
			*component = &DirectX::XMFLOAT4::y;
			return true;
		case L'z':
			*component = &DirectX::XMFLOAT4::z;
			return true;
		case L'w':
			*component = &DirectX::XMFLOAT4::w;
			return true;
	}

	return false;
}