Create a function to prettify configuration string data

Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>

2 files changed, 677 insertions, 0 deletions

diff --git a/Lessons_uncategorized/Lesson_Configuration_Language_2/README.md b/Lessons_uncategorized/Lesson_Configuration_Language_2/README.md
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+It is almost impossible to find something in the raw output of the `EFI_HII_CONFIG_ROUTING_PROTOCOL.ExportConfig()` function, so let's try prettify it. For this we will write a custom function `PrintConfigString`:
+```cpp
+- gST->ConOut->OutputString(gST->ConOut, Result);
++ PrintConfigString(Result);
+```
+
+In our `PrintConfigString` function we would split the configuration string by the keyword separator `&` and use another `PrintConfigSubString` function to print each `<key>=<data>` pair:
+```cpp
+VOID PrintConfigString(
+  IN EFI_STRING ConfigString
+  )
+{
+  UINTN StartIndex=0;
+  for (UINTN i=0; ConfigString[i] != 0; i++) {
+    if (ConfigString[i] == L'&') {
+      ConfigString[i] = 0;                                         <--- we can modify the string as we wouldn't need it after this function
+      PrintConfigSubString(&ConfigString[StartIndex]);
+      StartIndex = i+1;
+    }
+  }
+  PrintConfigSubString(&ConfigString[StartIndex]);
+}
+```
+
+Here is how our `PrintConfigSubString` function would look like:
+```cpp
+VOID PrintConfigSubString(
+  IN EFI_STRING ConfigString
+  )
+{
+  EFI_STATUS Status;
+  if (StrStr(ConfigString, L"GUID=")) {
+    <...>						// display the full string and actual guid
+  } else if (StrStr(ConfigString, L"NAME=")) {
+    <...>                                               // display the full string and actual name
+  } else if (StrStr(ConfigString, L"PATH=")) {
+    <...>
+  } else if (StrStr(ConfigString, L"VALUE=")) {
+    <...>                                               // display the full string and actual value
+  } else if (StrStr(ConfigString, L"OFFSET=") || StrStr(ConfigString, L"WIDTH=")) {
+    Print(L"%s  ", ConfigString);                       // don't print '\n', so we could see the "OFFSET=<...>  WIDTH=<...>  VALUE=<...>" on the same string
+  } else {
+    Print(L"%s\n", ConfigString);
+  }
+}
+```
+
+Here you can see, that for each key we would need a special code to print it.
+If the string starts with a `GUID=`/`NAME=`/`PATH=` we will parse the data and display actual GUID/Name/DevicePath in a readable standard format. If the string starts with `VALUE=` we would display its data as a hex buffer similar to hexdump. If the string starts with `OFFSET=` or `WIDTH=` we would display data as-is and without any carriage return, so the `OFFSET`/`WIDTH`/`VALUE` data would be placed at the same string.
+
+## `GUID=`
+
+Let's start with the `GUID=` string handling. First of all we print a new line `Print(L"\n")` as `GUID=` signifies a start of a new configuration header. Next we pass the string key data to our special `GuidFromCfgString` function that creates `EFI_GUID` value on the heap from the string content:
+```cpp
+Print(L"\n");
+EFI_GUID* Guid;
+Status = GuidFromCfgString(&ConfigString[StrLen(L"GUID=")], StrLen(ConfigString) - StrLen(L"GUID="), &Guid);
+if (!EFI_ERROR(Status))
+  Print(L"%s (%g)\n", ConfigString, Guid);
+else
+  Print(L"%s\n", ConfigString);
+FreePool(Guid);
+```
+
+The `GuidFromCfgString` function in turn uses `ByteCfgStringToBuffer` helper to get `EFI_GUID` data as an array:
+```cpp
+EFI_STATUS GuidFromCfgString(CHAR16* CfgString, UINTN Size, EFI_GUID** Guid)
+{
+  UINTN GuidSize;
+  ByteCfgStringToBuffer(CfgString, Size, (UINT8**)Guid, &GuidSize);
+  if (GuidSize != sizeof(EFI_GUID))
+    return EFI_NOT_FOUND;
+  return EFI_SUCCESS;
+}
+```
+
+And here is the `ByteCfgStringToBuffer` function. It receives config string and its length as arguments and returns bytes buffer with its size:
+```cpp
+VOID ByteCfgStringToBuffer(CHAR16* CfgString, UINTN CfgStringLen, UINT8** Buffer, UINTN* BufferSize)
+{
+  *BufferSize = (CfgStringLen + 1) / 2;
+  *Buffer = (UINT8*)AllocateZeroPool(*BufferSize);
+  UINT8  DigitUint8;
+  CHAR16 TempStr[2] = {0};
+  for (UINTN Index = 0; Index < CfgStringLen; Index++) {
+    TempStr[0] = CfgString[Index];
+    DigitUint8 = (UINT8)StrHexToUint64(TempStr);
+    if ((Index & 1) == 0) {
+      (*Buffer)[Index/2] = DigitUint8;
+    } else {
+      (*Buffer)[Index/2] = (UINT8)(((*Buffer)[Index/2] << 4) + DigitUint8);
+    }
+  }
+}
+```
+
+What does this function do? Let's some part from the output as an example:
+```
+GUID=1cc53572800cab4c87ac3b084a6304b1
+```
+In this case `ByteCfgStringToBuffer` function will only receive the string data portion:
+```
+1cc53572800cab4c87ac3b084a6304b1
+```
+and construct byte array like this:
+```cpp
+{0x1c, 0xc5, 0x35, 0x72, 0x80, 0x0c, 0xab, 0x4c, 0x87, 0xac, 0x3b, 0x08, 0x4a, 0x63, 0x04, 0xb1}
+```
+Which is the same as:
+```cpp
+{{0x7235c51c}, {0x0c80}, {0x4cab}, {0x87, 0xac, 0x3b, 0x08, 0x4a, 0x63, 0x04, 0xb1}}
+```
+And this is the GUID `gOvmfPlatformConfigGuid` from the [https://github.com/tianocore/edk2/blob/master/OvmfPkg/OvmfPkg.dec](https://github.com/tianocore/edk2/blob/master/OvmfPkg/OvmfPkg.dec):
+```
+[Guids]
+  ...
+  gOvmfPlatformConfigGuid               = {0x7235c51c, 0x0c80, 0x4cab, {0x87, 0xac, 0x3b, 0x08, 0x4a, 0x63, 0x04, 0xb1}}
+```
+So you just need to cast the returned buffer to `EFI_GUID` and you can print it as usual with `%g`. As the `EFI_GUID` was allocated on heap we use the `FreePool` function after the print statement.
+
+## `NAME=`
+
+To print `NAME=` data we use the `NameFromCfgString` helper function:
+```cpp
+CHAR16* Name;
+NameFromCfgString(&ConfigString[StrLen(L"NAME=")], StrLen(ConfigString) - StrLen(L"NAME="), &Name);
+Print(L"%s (%s)\n", ConfigString, Name);
+FreePool(Name);
+```
+
+This function looks like this:
+```cpp
+EFI_STATUS NameFromCfgString(CHAR16* CfgString, UINTN Size, CHAR16** Name)
+{
+  *Name = AllocateZeroPool(Size * sizeof(CHAR16));
+  CHAR16 TempStr[4];
+  for (UINTN i=0; i<Size; i+=4) {
+    StrnCpyS(TempStr, sizeof(TempStr), CfgString+i, 4);
+    (*Name)[i/4] = (CHAR16)StrHexToUint64(TempStr);
+  }
+  return EFI_SUCCESS;
+}
+```
+
+Once again let's see the things on the example from the output:
+```
+NAME=004d00610069006e0046006f0072006d00530074006100740065
+```
+`NameFromCfgString` will receive in this case just the string data part:
+```
+004d00610069006e0046006f0072006d00530074006100740065
+```
+And convert it to the `CHAR16` array:
+```cpp
+{ 0x004d, 0x0061, 0x0069, 0x006e, 0x0046, 0x006f, 0x0072, 0x006d, 0x0053, 0x0074, 0x0061, 0x0074, 0x0065 }
+```
+Which essentially is:
+```cpp
+{ L'M', L'a', L'i', L'n', L'F', L'o', L'r', L'm', L'S', L't', L'a', L't', L'e' }
+```
+That corresponds to the string:
+```cpp
+MainFormState
+```
+
+## `PATH=`
+
+The `PATH=` data contains device path encoded in bytes. String to device path conversion is done with the help of the `DevicePathFromCfgString` helper function:
+```cpp
+EFI_DEVICE_PATH_PROTOCOL* DevicePath;
+Status = DevicePathFromCfgString(&ConfigString[StrLen(L"PATH=")], StrLen(ConfigString) - StrLen(L"PATH="), &DevicePath);
+if (!EFI_ERROR(Status))
+  Print(L"%s (%s)\n", ConfigString, ConvertDevicePathToText((EFI_DEVICE_PATH_PROTOCOL*) DevicePath, FALSE, FALSE));
+else
+  Print(L"%s\n", ConfigString);
+FreePool(DevicePath);
+```
+
+Here is how it looks like. It uses the same `ByteCfgStringToBuffer` function that we've used in `GUID=` case to convert string data to a buffer. In the end we verify if the final buffer is really a correct device path:
+```cpp
+EFI_STATUS DevicePathFromCfgString(CHAR16* CfgString, UINTN Size, EFI_DEVICE_PATH_PROTOCOL** DevicePath)
+{
+  UINTN DevicePathSize;
+  ByteCfgStringToBuffer(CfgString, Size, (UINT8**)DevicePath, &DevicePathSize);
+
+  EFI_DEVICE_PATH_PROTOCOL* DevicePathTest = *DevicePath;
+  while (!IsDevicePathEnd(DevicePathTest)) {
+    if ((DevicePathTest->Type == 0) || (DevicePathTest->SubType == 0) || (DevicePathNodeLength(DevicePathTest) < sizeof(EFI_DEVICE_PATH_PROTOCOL)))
+      return EFI_NOT_FOUND;
+    DevicePathTest = NextDevicePathNode (DevicePathTest);
+  }
+
+  return EFI_SUCCESS;
+}
+```
+
+As here we use device path library utilities don't forget to add `DevicePathLib` to the `[LibraryClasses]` in the `UefiLessonsPkg/HIIConfig/HIIConfig.inf` file and add its header `#include <Library/DevicePathLib.h>` to the `UefiLessonsPkg/HIIConfig/HIIConfig.c` file.
+
+## `VALUE=`
+
+Handling code for `VALUE=` key looks like this:
+```cpp
+PrintLongString(ConfigString);
+Print(L"\n");
+UINT8* Buffer;
+UINTN BufferSize;
+ByteCfgStringToBufferReversed(&ConfigString[StrLen(L"VALUE=")], StrLen(&ConfigString[StrLen(L"VALUE=")]), &Buffer, &BufferSize);
+PrintBuffer(Buffer, BufferSize);
+FreePool(Buffer);
+```
+In this case we first print data as a string. But because it can be longer than `gEfiMdePkgTokenSpaceGuid.PcdUefiLibMaxPrintBufferSize`, we can't just use ordinary `Print` statement. We use our custom `PrintLongString` function that prints `<...>` at the end of a string that will be truncated on an ordinary print. This way we have a clear way to see if the output is complete or not:
+```cpp
+VOID PrintLongString(CHAR16* Str)
+{
+  UINT32 MaxPrintBufferSize = PcdGet32(PcdUefiLibMaxPrintBufferSize);
+  if (StrLen(Str) > MaxPrintBufferSize) {
+    EFI_STRING TempStr = (EFI_STRING)AllocateZeroPool(MaxPrintBufferSize * sizeof (CHAR16));
+    CopyMem(TempStr, Str, MaxPrintBufferSize * sizeof (CHAR16));
+    TempStr[MaxPrintBufferSize-1]=0;
+    TempStr[MaxPrintBufferSize-2]=L'>';
+    TempStr[MaxPrintBufferSize-3]=L'.';
+    TempStr[MaxPrintBufferSize-4]=L'.';
+    TempStr[MaxPrintBufferSize-5]=L'.';
+    TempStr[MaxPrintBufferSize-6]=L'<';
+    Print(L"%s", TempStr);
+    FreePool(TempStr);
+  } else {
+    Print(L"%s", Str);
+  }
+}
+```
+Next we want to get the actual data in the array. The data after the `VALUE=` key is encoded in bytes, but the order is reversed. That means that data like this:
+```
+VALUE=112233445566
+```
+actually corresponds to a byte array:
+```cpp
+{0x66, 0x55, 0x44, 0x33, 0x22, 0x11}
+```
+That is why we use different function to get the byte array than in `GUID=` or `PATH=` cases. `ByteCfgStringToBufferReversed` is a little bit different than `ByteCfgStringToBuffer`:
+```cpp
+VOID ByteCfgStringToBufferReversed(CHAR16* CfgString, UINTN CfgStringLen, UINT8** Buffer, UINTN* BufferSize)
+{
+  *BufferSize = (CfgStringLen + 1) / 2;
+  *Buffer = (UINT8*)AllocateZeroPool(*BufferSize);
+  UINT8  DigitUint8;
+  CHAR16 TempStr[2] = {0};
+  for (INTN Index = (CfgStringLen-1); Index >= 0; Index--) {
+    TempStr[0] = CfgString[Index];
+    DigitUint8 = (UINT8)StrHexToUint64(TempStr);
+    if (((CfgStringLen-1-Index) & 1) == 0) {
+      (*Buffer)[(CfgStringLen-1-Index)/2] = DigitUint8;
+    } else {
+      (*Buffer)[(CfgStringLen-1-Index)/2] = (UINT8)((DigitUint8 << 4) + (*Buffer)[(CfgStringLen-1-Index)/2]);
+    }
+  }
+}
+```
+
+Finally we display the value buffer similar to the Linux `hexdump -C` utility output:
+```cpp
+VOID PrintBuffer(UINT8* Buffer, UINTN Size)
+{
+  UINTN i = 0;
+  while (i < Size) {
+    Print(L"%02x ", Buffer[i]);
+    i++;
+    if (!(i%16)) {
+      Print(L" | ");
+      for (UINTN j=16; j>0; j--)
+        if ((Buffer[i-j] >= 0x20) && (Buffer[i-j] < 0x7E))
+          Print(L"%c", Buffer[i-j]);
+        else
+          Print(L".");
+      Print(L"\n");
+    }
+  }
+
+  if (i%16) {
+    for (UINTN j=0; j<=15; j++) {
+      if ((i+j)%16)
+        Print(L"   ");
+      else
+        break;
+    }
+    Print(L" | ");
+
+    for (UINTN j=(i%16); j>0; j--) {
+      if ((Buffer[i-j] >= 0x20) && (Buffer[i-j] < 0x7E))
+        Print(L"%c", Buffer[i-j]);
+      else
+        Print(L".");
+    }
+    Print(L"\n");
+  }
+}
+```
+
+# Putting it all together
+
+Now when we have all the parsing code we can finally test it. Here is the output of the `HIIConfig.efi dump` command. I've just truncated the bunch of zeros in the middle for a better readability:
+```
+FS0:\> HIIConfig.efi dump
+Full configuration for the HII Database (Size = 42018):
+
+GUID=1cc53572800cab4c87ac3b084a6304b1 (7235C51C-0C80-4CAB-87AC-3B084A6304B1)
+NAME=004d00610069006e0046006f0072006d00530074006100740065 (MainFormState)
+PATH=01041400dfc5dcd907405e4390988970935504b27fff0400 (VenHw(D9DCC5DF-4007-435E-9098-8970935504B2))
+OFFSET=0000  WIDTH=0020  VALUE=00000000000000000000000000000000000000000000007400650073006e0055
+55 00 6E 00 73 00 65 00 74 00 00 00 00 00 00 00  | U.n.s.e.t.......
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  | ................
+OFFSET=0020  WIDTH=0004  VALUE=00000000
+00 00 00 00                                      | ....
+
+GUID=1cc53572800cab4c87ac3b084a6304b1 (7235C51C-0C80-4CAB-87AC-3B084A6304B1)
+NAME=004d00610069006e0046006f0072006d00530074006100740065 (MainFormState)
+PATH=01041400dfc5dcd907405e4390988970935504b27fff0400 (VenHw(D9DCC5DF-4007-435E-9098-8970935504B2))
+ALTCFG=0000
+OFFSET=0020  WIDTH=0004  VALUE=00000000
+00 00 00 00                                      | ....
+
+GUID=1cc53572800cab4c87ac3b084a6304b1 (7235C51C-0C80-4CAB-87AC-3B084A6304B1)
+NAME=004d00610069006e0046006f0072006d00530074006100740065 (MainFormState)
+PATH=01041400dfc5dcd907405e4390988970935504b27fff0400 (VenHw(D9DCC5DF-4007-435E-9098-8970935504B2))
+ALTCFG=0001
+OFFSET=0020  WIDTH=0004  VALUE=00000000
+00 00 00 00                                      | ....
+
+GUID=16d6474bd6a852459d44ccad2e0f4cf9 (4B47D616-A8D6-4552-9D44-CCAD2E0F4CF9)
+NAME=00490053004300530049005f0043004f004e004600490047005f004900460052005f004e00560044004100540041 (ISCSI_CONFIG_IFR_NVDATA)
+PATH=0104140016d6474bd6a852459d44ccad2e0f4cf97fff0400 (VenHw(4B47D616-A8D6-4552-9D44-CCAD2E0F4CF9))
+OFFSET=0  WIDTH=000000000000453c  VALUE=00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000<...>
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  | ................
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  | ................
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  | ................
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  | ................
+...                                                                             <----- truncated output
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  | ................
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  | ................
+00 00 00 00 00 00 00 00 00 00 00 00              | ............
+
+GUID=16d6474bd6a852459d44ccad2e0f4cf9 (4B47D616-A8D6-4552-9D44-CCAD2E0F4CF9)
+NAME=00490053004300530049005f0043004f004e004600490047005f004900460052005f004e00560044004100540041 (ISCSI_CONFIG_IFR_NVDATA)
+PATH=0104140016d6474bd6a852459d44ccad2e0f4cf97fff0400 (VenHw(4B47D616-A8D6-4552-9D44-CCAD2E0F4CF9))
+ALTCFG=0000
+OFFSET=01d8  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=01d9  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=01da  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=01dc  WIDTH=0002  VALUE=03e8
+E8 03                                            | ..
+OFFSET=01de  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=01df  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=05fe  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=062a  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=062b  WIDTH=0001  VALUE=01
+01                                               | .
+OFFSET=0fd4  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fd5  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fd6  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fd7  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fd8  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fd9  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fda  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fdb  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fdc  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fdd  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fde  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fdf  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe0  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe1  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe2  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe3  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe4  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe5  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe6  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe7  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe8  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe9  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fea  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0feb  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fec  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0fee  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0ff0  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0ff2  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0ff4  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0ff6  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0ff8  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0ffa  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0ffc  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0ffd  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0ffe  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fff  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1000  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1001  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1002  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1003  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1004  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1005  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1006  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1007  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1008  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1009  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=100a  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=100b  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=100c  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=100e  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=1010  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=1012  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=1014  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=1016  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=1018  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=101a  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=101c  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=101d  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=101e  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=101f  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1020  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1021  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1022  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1023  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1024  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1025  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1026  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1027  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1028  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1029  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=102a  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=102b  WIDTH=0001  VALUE=00
+00                                               | .
+
+GUID=16d6474bd6a852459d44ccad2e0f4cf9 (4B47D616-A8D6-4552-9D44-CCAD2E0F4CF9)
+NAME=00490053004300530049005f0043004f004e004600490047005f004900460052005f004e00560044004100540041 (ISCSI_CONFIG_IFR_NVDATA)
+PATH=0104140016d6474bd6a852459d44ccad2e0f4cf97fff0400 (VenHw(4B47D616-A8D6-4552-9D44-CCAD2E0F4CF9))
+ALTCFG=0001
+OFFSET=01d8  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=01d9  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=01da  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=01dc  WIDTH=0002  VALUE=03e8
+E8 03                                            | ..
+OFFSET=01de  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=01df  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=05fe  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=062a  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=062b  WIDTH=0001  VALUE=01
+01                                               | .
+OFFSET=0fd4  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fd5  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fd6  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fd7  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fd8  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fd9  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fda  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fdb  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fdc  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fdd  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fde  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fdf  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe0  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe1  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe2  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe3  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe4  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe5  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe6  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe7  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe8  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fe9  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fea  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0feb  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fec  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0fee  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0ff0  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0ff2  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0ff4  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0ff6  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0ff8  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0ffa  WIDTH=0002  VALUE=0064
+64 00                                            | d.
+OFFSET=0ffc  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0ffd  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0ffe  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=0fff  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1000  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1001  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1002  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1003  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1004  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1005  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1006  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1007  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1008  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1009  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=100a  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=100b  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=100c  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=100e  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=1010  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=1012  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=1014  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=1016  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=1018  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=101a  WIDTH=0002  VALUE=0000
+00 00                                            | ..
+OFFSET=101c  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=101d  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=101e  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=101f  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1020  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1021  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1022  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1023  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1024  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1025  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1026  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1027  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1028  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=1029  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=102a  WIDTH=0001  VALUE=00
+00                                               | .
+OFFSET=102b  WIDTH=0001  VALUE=00
+00                                               | .
+```
+
diff --git a/README.md b/README.md
index b86863e..cfb1ee1 100644
--- a/README.md
+++ b/README.md
@@ -79,6 +79,7 @@ These series of lessons are intendend to get you started with UEFI programming i
 - [Lesson 73](Lessons/Lesson_73): Setting defaults for the VFR questions: `default`/`defaultstore`/`resetbutton` keywords
 _____
 - [Lesson XX](Lessons_uncategorized/Lesson_Configuration_Language_1): UEFI Configuration language. Dump current HII Database settings with the `EFI_HII_CONFIG_ROUTING_PROTOCOL.ExportConfig()` function
+- [Lesson XX](Lessons_uncategorized/Lesson_Configuration_Language_2): UEFI Configuration language. Create a function to prettify configuration string data 
 _____
 - [Lesson XX](Lessons_uncategorized/Lesson_ARCH): Architecture specifier in section names
 - [Lesson XX](Lessons_uncategorized/Lesson_SKU): SKU specifier in section names