Lua GSL document where things happens

lua-gsl

The lua-gsl.h and lua-gsl.c implements support for the gsl_shell_state struct.

In lua-gsl.c essentially we:

• create a lua_State (gsl_shell_open function)
• manage the two mutexes that are included in the gsl_shell_state struct
• call the gsl_set_error_handler_off() function (in the function luaopen_gsl)
• set an extern reference to a gdt function so that the gdt static library is not discarded at link time

gsl_shell_interp (gsl_shell class)

The files gsl_shell_inter.h and .cpp implements the class gsl_shell. What is done here is essentially what is done in the Lua frontend:

• lua_State is initialized
• commands are taken, as strings, and passed to Lua to be executed
• take care of errors and print them of the screen
• manage incomplete inputs to offer continuation

More in detail

Initialization happens through the gsl_shell::init() method that calls gsl_shell_open() than execure via lua cpcall the pinit function and finally calls elem::LuaOpenLibrary() to load the elementary plot library.

In turns the pinit function does:

• init the language toolkit calling language_init()
• load standard Lua libraries
• override loaders to use instead the language toolkit's loaders
• call luaopen_gsl(), see above for this latter
• load using Lua's "require" function the "gslext" Lua module