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• -------------------------------------------------------------------------------
• -- Loader for the PUMAS C library
• -- Author: Valentin Niess
• -- License: GNU LGPL-3.0
• -------------------------------------------------------------------------------
• local ffi = require('ffi') -- XXX support vanilla Lua with cffi?
• local os = require('pumas.os')
• require('pumas.header.api')
• require('pumas.header.extensions')
• require('pumas.header.gull')
• require('pumas.header.turtle')
• local clib
• -------------------------------------------------------------------------------
• -- Prototypes of some standard C functions
• -------------------------------------------------------------------------------
• ffi.cdef [[
• void * calloc(size_t, size_t);
• void free(void *);
• size_t fwrite(const void * ptr, size_t size, size_t nmemb,
• struct FILE * stream);
• void * malloc(size_t);
• ]]
• -------------------------------------------------------------------------------
• -- Load the C libraries and their extensions if not embedded in the runtime
• -------------------------------------------------------------------------------
• do
• local ok = pcall(function () return ffi.C.pumas_error_initialise end)
• if ok then
• clib = ffi.C
• else
• local _, path = ... -- Lua 5.2
• if path == nil then
• path = debug.getinfo(1, 'S').source:sub(2) -- Lua 5.1
• end
• local dirname = path:match('(.*'..os.PATHSEP..')') or ''
• local libname = 'libpumas_extended.'..os.LIBEXT
• local love = _G.love
• if love then
• -- For love2d the module is expected to be located in the source
• -- XXX Could love.filesystem be used instead of lfs?
• dirname = love.filesystem.getSource()..dirname
• path = dirname..libname
• else
• -- For Lua modules the C library is installed under lib/ while
• -- this source is under share/.
• -- XXX this is likely OS specific
• local version = _VERSION:match('[0-9.]+')
• path = dirname..table.concat({'..', '..', '..', '..', 'lib', 'lua',
• version, 'pumas', libname}, os.PATHSEP)
• end
• clib = ffi.load(path)
• end
• end
• -------------------------------------------------------------------------------
• -- Return the package
• -------------------------------------------------------------------------------
• return clib