Missing TA_GetVersionString function in Windows DLL

[Youngv]

Description: I found that the TA_GetVersionString function is missing in the Windows DLL (ta-lib.dll). This function is available in other platforms (Linux/macOS) but seems to be missing in the Windows build.

Steps to reproduce:

1. Install TA-Lib on Windows
2. Try to call TA_GetVersionString function through FFI
3. Get Fiddle::DLError indicating the function is not found

Environment:

• OS: Windows
• Ruby version: 3.x
• TA-Lib version: ta-lib-0.6.4-windows-x86_64.msi

Expected behavior:

• TA_GetVersionString should be available in Windows DLL like other platforms

Actual behavior:

• Function is missing in Windows DLL
• Causes FFI binding to fail when trying to load this function

Would it be possible to include this function in the Windows build as well for consistency across platforms?

[mario4tier]

Thanks for reporting an issue.

Is there any other function working, or the problem is specific to TA_GetVersionString()? As an example, is TA_Initialize() working?

(I am wondering because TA_GetVersionString is exported in same way as the rest of the API on windows).

[Youngv]

Yes, other functions are working correctly. For example:

• TA_Initialize()
• TA_Shutdown()
• TA_GroupTableAlloc()
• All indicator functions (SMA, EMA, MACD, etc.)

The issue seems to be specific to TA_GetVersionString().

I'm using Ruby FFI (Fiddle) to bind the functions and have already created a gem ta_lib_ffi. Here's my extern declaration:

require "fiddle"
require "fiddle/import"

# Ruby FFI wrapper for TA-Lib (Technical Analysis Library)
module TALib
  VERSION = "0.1.0"

  extend Fiddle::Importer

  lib_path = case RUBY_PLATFORM
             when /darwin/
               brew_prefix = `brew --prefix`.chomp
               "#{brew_prefix}/lib/libta-lib.dylib"
             when /linux/
               "libta-lib.so"
             when /cygwin|mswin|mingw|bccwin|wince|emx/
               "C:/Program Files/TA-Lib/bin/ta-lib.dll"
             else
               raise "Unsupported platform"
             end

  dlload lib_path

  extern "const char TA_GetVersionString(void)"
  extern "int TA_Initialize()"
  extern "int TA_Shutdown()"
  extern "int TA_GroupTableAlloc(TA_StringTable**)"
  extern "int TA_GroupTableFree(TA_StringTable*)"
end

[mario4tier]

TA_GetVersionString() returns a pointer.

Try replacing: extern "const char TA_GetVersionString(void)" with: extern "const char *TA_GetVersionString(void)"

[mrjbq7]

@Youngv that's a really cool project, I love the Ruby bindings.

If you get interested, we'd love to link it or fork it in the https://github.com/ta-lib organization!

[mario4tier]

@Youngv an invite has been sent.

You can also move your existing repos in the org (like we did for ta-lib-python and ta-lib core). You will then benefit from a lot more visibility/visitors. You still keep all the stars and control of your repos (and it still shows in your profile).

Also, it makes some CI easier (e.g. https://ta-lib.org/install is automatically updated when there is a new TA-Lib core release).

If you want to talk more directly, consider joining us on Discord: https://discord.com/invite/Erb6SwsVbH

[Youngv]

@mario4tier I tried replacing the declaration with extern "const char *TA_GetVersionString(void)", but the issue persists. I used DLL Export Viewer to check the DLL, and it seems that TA_GetVersionString is not exported. Thank you for the invitation! I have a few concerns I’d like to discuss. I'll reach out on Discord soon.