Warning: this is an htmlized version!
The original is here, and
the conversion rules are here.
# peek-luadecls-2.txt
# This is part of peek.lua, that is part of the DaVinci project.
# See: <http://angg.twu.net/davinci.html>
#      <http://angg.twu.net/peek.html>
# Author: Eduardo Ochs <eduardoochs@gmail.com>
# Version: 2007aug05

# This is the output of
#   (find-lua51sh "cd src/; gcc -E -x c lstate.h")
#   (find-lua51sh "cd src/; gcc -E -x c lstate.h | grep -v '^#'")
# after some more hand-tuning...
# Compare:
# (find-tkdiff "peek-luadecls-1.txt" "peek-luadecls-2.txt")

typedef int ptrdiff_t;
typedef unsignedint size_t;
typedef int wchar_t;

union:luai_Cast { double l_d; long l_l; };
typedef struct:lua_State lua_State;
typedef int (lua_State* L)* lua_CFunction;
typedef char* (lua_State* L, void* ud, size_t* sz)* lua_Reader;
typedef int (lua_State* L, void* p, size_t sz, void* ud)* lua_Writer;
typedef void* (void* ud, void* ptr, size_t osize, size_t nsize)* lua_Alloc;
typedef double lua_Number;
typedef ptrdiff_t lua_Integer;
typedef struct:lua_Debug lua_Debug;
typedef void (lua_State* L, lua_Debug* ar)* lua_Hook;
struct:lua_Debug {
  int event;
  char* name;
  char* namewhat;
  char* what;
  char* source;
  int currentline;
  int nups;
  int linedefined;
  int lastlinedefined;
  char[60] short_src;
  int i_ci;
typedef unsignedint lu_int32;
typedef size_t lu_mem;
typedef ptrdiff_t l_mem;
typedef unsignedchar lu_byte;
typedef union:L_Umaxalign { double u; void* s; long l; } L_Umaxalign;
typedef double l_uacNumber;
typedef lu_int32 Instruction;
typedef union:GCObject GCObject;
typedef struct:GCheader {
  GCObject* next; lu_byte tt; lu_byte marked;
} GCheader;
typedef union:Value {
  GCObject* gc;
  void* p;
  lua_Number n;
  int b;
} Value;
typedef struct:lua_TValue {
  Value value; int tt;
} TValue;
typedef TValue* StkId;
struct:TString__tsv {
  GCObject* next; lu_byte tt; lu_byte marked;
  lu_byte reserved;
  unsigned int hash;
  size_t len;
typedef union:TString {
  L_Umaxalign dummy;
  struct:TString__tsv tsv;
} TString;
struct:Udata__uv {
  GCObject* next; lu_byte tt; lu_byte marked;
  struct:Table* metatable;
  struct:Table* env;
  size_t len;
typedef union:Udata {
  L_Umaxalign dummy;
  struct:Udata__uv uv;
} Udata;
typedef struct:Proto {
  GCObject* next; lu_byte tt; lu_byte marked;
  TValue* k;
  Instruction* code;
  struct:Proto** p;
  int* lineinfo;
  struct:LocVar* locvars;
  TString** upvalues;
  TString* source;
  int sizeupvalues;
  int sizek;
  int sizecode;
  int sizelineinfo;
  int sizep;
  int sizelocvars;
  int linedefined;
  int lastlinedefined;
  GCObject* gclist;
  lu_byte nups;
  lu_byte numparams;
  lu_byte is_vararg;
  lu_byte maxstacksize;
} Proto;
typedef struct:LocVar {
  TString* varname;
  int startpc;
  int endpc;
} LocVar;
struct:UpVal__u__l {
  struct:UpVal* prev;
  struct:UpVal* next;
union:UpVal__u {
  TValue value;
  struct:UpVal__u__l l;
typedef struct:UpVal {
  GCObject* next; lu_byte tt; lu_byte marked;
  TValue* v;
  union:UpVal__u u;
} UpVal;
typedef struct:CClosure {
  GCObject* next; lu_byte tt; lu_byte marked; lu_byte isC; lu_byte nupvalues; GCObject* gclist; struct:Table* env;
  lua_CFunction f;
  TValue[1] upvalue;
} CClosure;
typedef struct:LClosure {
  GCObject* next; lu_byte tt; lu_byte marked; lu_byte isC; lu_byte nupvalues; GCObject* gclist; struct:Table* env;
  struct:Proto* p;
  UpVal*[1] upvals;
} LClosure;
typedef union:Closure {
  CClosure c;
  LClosure l;
} Closure;
struct:TKey__nk {
  Value value; int tt;
  struct:Node* next;
typedef union:TKey {
  struct:TKey__nk nk;
  TValue tvk;
} TKey;
typedef struct:Node {
  TValue i_val;
  TKey i_key;
} Node;
typedef struct:Table {
  GCObject* next; lu_byte tt; lu_byte marked;
  lu_byte flags;
  lu_byte lsizenode;
  struct:Table* metatable;
  TValue* array;
  Node* node;
  Node* lastfree;
  GCObject* gclist;
  int sizearray;
} Table;
typedef struct:Zio ZIO;
typedef struct:Mbuffer {
  char* buffer;
  size_t n;
  size_t buffsize;
} Mbuffer;
struct:Zio {
  size_t n;
  char* p;
  lua_Reader reader;
  void* data;
  lua_State* L;
typedef struct:stringtable {
  GCObject** hash;
  lu_int32 nuse;
  int size;
} stringtable;
typedef struct:CallInfo {
  StkId base;
  StkId func;
  StkId top;
  Instruction* savedpc;
  int nresults;
  int tailcalls;
} CallInfo;
typedef struct:global_State {
  stringtable strt;
  lua_Alloc frealloc;
  void* ud;
  lu_byte currentwhite;
  lu_byte gcstate;
  int sweepstrgc;
  GCObject* rootgc;
  GCObject** sweepgc;
  GCObject* gray;
  GCObject* grayagain;
  GCObject* weak;
  GCObject* tmudata;
  Mbuffer buff;
  lu_mem GCthreshold;
  lu_mem totalbytes;
  lu_mem estimate;
  lu_mem gcdept;
  int gcpause;
  int gcstepmul;
  lua_CFunction panic;
  TValue l_registry;
  struct:lua_State* mainthread;
  UpVal uvhead;
  struct:Table*[9] mt;
  TString*[17] tmname;
} global_State;
struct:lua_State {
  GCObject* next; lu_byte tt; lu_byte marked;
  lu_byte status;
  StkId top;
  StkId base;
  global_State* l_G;
  CallInfo* ci;
  Instruction* savedpc;
  StkId stack_last;
  StkId stack;
  CallInfo* end_ci;
  CallInfo* base_ci;
  int stacksize;
  int size_ci;
  unsigned short nCcalls;
  lu_byte hookmask;
  lu_byte allowhook;
  int basehookcount;
  int hookcount;
  lua_Hook hook;
  TValue l_gt;
  TValue env;
  GCObject* openupval;
  GCObject* gclist;
  struct:lua_longjmp* errorJmp;
  ptrdiff_t errfunc;
union:GCObject {
  GCheader gch;
  union:TString ts;
  union:Udata u;
  union:Closure cl;
  struct:Table h;
  struct:Proto p;
  struct:UpVal uv;
  struct:lua_State th;