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#*****************************************************************************
# * *
# * File: lauxlib.pas *
# * Authors: TeCGraf (C headers + actual Lua libraries) *
# * Lavergne Thomas (original translation to Pascal) *
# * Bram Kuijvenhoven (update to Lua 5.1.1 for FreePascal) *
# * Description: Lua auxiliary library *
# * *
# *****************************************************************************
#
#** $Id: lauxlib.h,v 1.59 2003/03/18 12:25:32 roberto Exp $
#** Auxiliary functions for building Lua libraries
#** See Copyright Notice in lua.h
#
#
#** Translated to pascal by Lavergne Thomas
#** Notes :
#** - Pointers type was prefixed with 'P'
#** Bug reports :
#** - thomas.lavergne@laposte.net
#** In french or in english
#
import
lua
proc pushstring*(L: PState, s: string)
# compatibilty macros
proc getn*(L: PState, n: int): int
# calls lua_objlen
proc setn*(L: PState, t, n: int)
# does nothing!
type
Treg*{.final.} = object
name*: cstring
func*: CFunction
Preg* = ptr Treg
proc openlib*(L: PState, libname: cstring, lr: Preg, nup: int){.cdecl,
dynlib: lua.LIB_NAME, importc: "luaL_openlib".}
proc register*(L: PState, libname: cstring, lr: Preg){.cdecl,
dynlib: lua.LIB_NAME, importc: "luaL_register".}
proc getmetafield*(L: PState, obj: int, e: cstring): int{.cdecl,
dynlib: lua.LIB_NAME, importc: "luaL_getmetafield".}
proc callmeta*(L: PState, obj: int, e: cstring): int{.cdecl,
dynlib: LIB_NAME, importc: "luaL_callmeta".}
proc typerror*(L: PState, narg: int, tname: cstring): int{.cdecl,
dynlib: LIB_NAME, importc: "luaL_typerror".}
proc argerror*(L: PState, numarg: int, extramsg: cstring): int{.cdecl,
dynlib: LIB_NAME, importc: "luaL_argerror".}
proc checklstring*(L: PState, numArg: int, len: ptr int): cstring{.cdecl,
dynlib: LIB_NAME, importc: "luaL_checklstring".}
proc optlstring*(L: PState, numArg: int, def: cstring, len: ptr int): cstring{.
cdecl, dynlib: LIB_NAME, importc: "luaL_optlstring".}
proc checknumber*(L: PState, numArg: int): Number{.cdecl,
dynlib: LIB_NAME, importc: "luaL_checknumber".}
proc optnumber*(L: PState, nArg: int, def: Number): Number{.cdecl,
dynlib: LIB_NAME, importc: "luaL_optnumber".}
proc checkinteger*(L: PState, numArg: int): Integer{.cdecl,
dynlib: LIB_NAME, importc: "luaL_checkinteger".}
proc optinteger*(L: PState, nArg: int, def: Integer): Integer{.
cdecl, dynlib: LIB_NAME, importc: "luaL_optinteger".}
proc checkstack*(L: PState, sz: int, msg: cstring){.cdecl,
dynlib: LIB_NAME, importc: "luaL_checkstack".}
proc checktype*(L: PState, narg, t: int){.cdecl, dynlib: LIB_NAME,
importc: "luaL_checktype".}
proc checkany*(L: PState, narg: int){.cdecl, dynlib: LIB_NAME,
importc: "luaL_checkany".}
proc newmetatable*(L: PState, tname: cstring): int{.cdecl,
dynlib: LIB_NAME, importc: "luaL_newmetatable".}
proc checkudata*(L: PState, ud: int, tname: cstring): Pointer{.cdecl,
dynlib: LIB_NAME, importc: "luaL_checkudata".}
proc where*(L: PState, lvl: int){.cdecl, dynlib: LIB_NAME,
importc: "luaL_where".}
proc error*(L: PState, fmt: cstring): int{.cdecl, varargs,
dynlib: LIB_NAME, importc: "luaL_error".}
proc checkoption*(L: PState, narg: int, def: cstring, lst: cstringArray): int{.
cdecl, dynlib: LIB_NAME, importc: "luaL_checkoption".}
proc reference*(L: PState, t: int): int{.cdecl, dynlib: LIB_NAME,
importc: "luaL_ref".}
proc unref*(L: PState, t, theref: int){.cdecl, dynlib: LIB_NAME,
importc: "luaL_unref".}
proc loadfile*(L: PState, filename: cstring): int{.cdecl,
dynlib: LIB_NAME, importc: "luaL_loadfile".}
proc loadbuffer*(L: PState, buff: cstring, size: int, name: cstring): int{.
cdecl, dynlib: LIB_NAME, importc: "luaL_loadbuffer".}
proc loadstring*(L: PState, s: cstring): int{.cdecl, dynlib: LIB_NAME,
importc: "luaL_loadstring".}
proc newstate*(): PState{.cdecl, dynlib: LIB_NAME,
importc: "luaL_newstate".}
proc open*(): PState
# compatibility; moved from unit lua to lauxlib because it needs luaL_newstate
#
#** ===============================================================
#** some useful macros
#** ===============================================================
#
proc argcheck*(L: PState, cond: bool, numarg: int, extramsg: cstring)
proc checkstring*(L: PState, n: int): cstring
proc optstring*(L: PState, n: int, d: cstring): cstring
proc checkint*(L: PState, n: int): int
proc checklong*(L: PState, n: int): int32
proc optint*(L: PState, n: int, d: float64): int
proc optlong*(L: PState, n: int, d: float64): int32
proc dofile*(L: PState, filename: cstring): int
proc dostring*(L: PState, str: cstring): int
proc getmetatable*(L: PState, tname: cstring)
# not translated:
# #define luaL_opt(L,f,n,d) (lua_isnoneornil(L,(n)) ? (d) : f(L,(n)))
#
#** =======================================================
#** Generic Buffer manipulation
#** =======================================================
#
const # note: this is just arbitrary, as it related to the BUFSIZ defined in stdio.h ...
BUFFERSIZE* = 4096
type
Buffer*{.final.} = object
p*: cstring # current position in buffer
lvl*: int # number of strings in the stack (level)
L*: PState
buffer*: array[0..BUFFERSIZE - 1, Char] # warning: see note above about LUAL_BUFFERSIZE
PBuffer* = ptr Buffer
proc addchar*(B: PBuffer, c: Char)
# warning: see note above about LUAL_BUFFERSIZE
# compatibility only (alias for luaL_addchar)
proc putchar*(B: PBuffer, c: Char)
# warning: see note above about LUAL_BUFFERSIZE
proc addsize*(B: PBuffer, n: int)
proc buffinit*(L: PState, B: PBuffer){.cdecl, dynlib: LIB_NAME,
importc: "luaL_buffinit".}
proc prepbuffer*(B: PBuffer): cstring{.cdecl, dynlib: LIB_NAME,
importc: "luaL_prepbuffer".}
proc addlstring*(B: PBuffer, s: cstring, L: int){.cdecl,
dynlib: LIB_NAME, importc: "luaL_addlstring".}
proc addstring*(B: PBuffer, s: cstring){.cdecl, dynlib: LIB_NAME,
importc: "luaL_addstring".}
proc addvalue*(B: PBuffer){.cdecl, dynlib: LIB_NAME,
importc: "luaL_addvalue".}
proc pushresult*(B: PBuffer){.cdecl, dynlib: LIB_NAME,
importc: "luaL_pushresult".}
proc gsub*(L: PState, s, p, r: cstring): cstring{.cdecl,
dynlib: LIB_NAME, importc: "luaL_gsub".}
proc findtable*(L: PState, idx: int, fname: cstring, szhint: int): cstring{.
cdecl, dynlib: LIB_NAME, importc: "luaL_findtable".}
# compatibility with ref system
# pre-defined references
const
NOREF* = - 2
REFNIL* = - 1
proc unref*(L: PState, theref: int)
proc getref*(L: PState, theref: int)
#
#** Compatibility macros and functions
#
# implementation
proc pushstring(L: PState, s: string) =
pushlstring(L, cstring(s), len(s))
proc getn(L: PState, n: int): int =
Result = objlen(L, n)
proc setn(L: PState, t, n: int) =
# does nothing as this operation is deprecated
nil
proc open(): PState =
Result = newstate()
proc dofile(L: PState, filename: cstring): int =
Result = loadfile(L, filename)
if Result == 0: Result = pcall(L, 0, MULTRET, 0)
proc dostring(L: PState, str: cstring): int =
Result = loadstring(L, str)
if Result == 0: Result = pcall(L, 0, MULTRET, 0)
proc getmetatable(L: PState, tname: cstring) =
getfield(L, REGISTRYINDEX, tname)
proc argcheck(L: PState, cond: bool, numarg: int, extramsg: cstring) =
if not cond:
discard argerror(L, numarg, extramsg)
proc checkstring(L: PState, n: int): cstring =
Result = checklstring(L, n, nil)
proc optstring(L: PState, n: int, d: cstring): cstring =
Result = optlstring(L, n, d, nil)
proc checkint(L: PState, n: int): int =
Result = toInt(checknumber(L, n))
proc checklong(L: PState, n: int): int32 =
Result = int32(ToInt(checknumber(L, n)))
proc optint(L: PState, n: int, d: float64): int =
Result = int(ToInt(optnumber(L, n, d)))
proc optlong(L: PState, n: int, d: float64): int32 =
Result = int32(ToInt(optnumber(L, n, d)))
proc addchar(B: PBuffer, c: Char) =
if cast[int](addr((B.p))) < (cast[int](addr((B.buffer[0]))) + BUFFERSIZE):
discard prepbuffer(B)
B.p[1] = c
B.p = cast[cstring](cast[int](B.p) + 1)
proc putchar(B: PBuffer, c: Char) =
addchar(B, c)
proc addsize(B: PBuffer, n: int) =
B.p = cast[cstring](cast[int](B.p) + n)
proc unref(L: PState, theref: int) =
unref(L, REGISTRYINDEX, theref)
proc getref(L: PState, theref: int) =
rawgeti(L, REGISTRYINDEX, theref)
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