Stack primary interface

• sgs_PushNull - push a null variable
• sgs_PushNulls - push multiple null variables
• sgs_PushBool - push a boolean variable
• sgs_PushInt - push an integer
• sgs_PushReal - push a real value
• sgs_PushStringBuf - push a new string from char buffer
• sgs_PushString - push a new string
• sgs_PushCFunc - push a C function
• sgs_PushPtr - push a pointer
• sgs_PushObjectPtr - push an object pointer
• sgs_PushVariable - push the specified variable
• sgs_StoreVariable - retrieve, acquire and pop the topmost variable on stack
• sgs_PushItem - retrieve and push the specified variable on stack
• sgs_InsertVariable - insert a variable on stack in the specified position
• sgs_Pop - pop the specified number of items from stack
• sgs_PopSkip - pop the specified number of items from stack, skipping some topmost items
• sgs_StackSize - return the size of the current stack frame
• sgs_SetStackSize - resize the current stack frame
• sgs_SetDeltaSize - relative-resize the current stack frame
• sgs_AdjustStack - change stack size to from returned argument count to expected
• sgs_AbsIndex - convert stack index to positive if possible (if it's <0 or >=StackSize, then it's invalid)
• sgs_IsValidIndex - check if specified stack index is valid
• sgs_OptStackItem - return without acquisition the specified variable on stack without errors
• sgs_StackItem - return without acquisition the specified variable on stack
• sgs_GetStackItem - retrieve and acquire the specified variable on stack
• sgs_SetStackItem - assign variable to the specified variable on stack
• sgs_ItemType - return the variable type of the specified variable on stack
• sgs_LoadArgsExtVA - parse the stack as an argument list with additional options (for custom wrapper functions)
• sgs_LoadArgsExt - parse the stack as an argument list with additional options
• sgs_LoadArgs - parse the stack as an argument list
• sgs_ParseMethod - the this object variable handling function, using the macro is preferred to this
• SGS_PARSE_METHOD - automagically handle a this object variable regardless of the way its passed
• sgs_Method - unhide the first variable on stack if there is a hidden this variable
• sgs_HideThis - hide the first variable on stack if the stack already doesn't contain a hidden this variable
• sgs_ForceHideThis - hide the first variable even if it wasn't previously hidden before unhiding
• sgs_StoreFuncConsts - store a list of C function constants in the specified variable
• sgs_StoreIntConsts - store a list of integer constants in the specified variable
• sgs_StoreRealConsts - store a list of real value constants in the specified variable