update to lua-5.3.4

1 files changed, 0 insertions, 679 deletions

diff --git a/libs/lua/lua-5.3.3/ldebug.c b/libs/lua/lua-5.3.3/ldebug.c
deleted file mode 100644
index e499ee362c..0000000000
--- a/libs/lua/lua-5.3.3/ldebug.c
+++ /dev/null
@@ -1,679 +0,0 @@
-/*
-** $Id: ldebug.c,v 2.120 2016/03/31 19:01:21 roberto Exp $
-** Debug Interface
-** See Copyright Notice in lua.h
-*/
-
-#define ldebug_c
-#define LUA_CORE
-
-#include "lprefix.h"
-
-
-#include <stdarg.h>
-#include <stddef.h>
-#include <string.h>
-
-#include "lua.h"
-
-#include "lapi.h"
-#include "lcode.h"
-#include "ldebug.h"
-#include "ldo.h"
-#include "lfunc.h"
-#include "lobject.h"
-#include "lopcodes.h"
-#include "lstate.h"
-#include "lstring.h"
-#include "ltable.h"
-#include "ltm.h"
-#include "lvm.h"
-
-
-
-#define noLuaClosure(f)		((f) == NULL || (f)->c.tt == LUA_TCCL)
-
-
-/* Active Lua function (given call info) */
-#define ci_func(ci)		(clLvalue((ci)->func))
-
-
-static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name);
-
-
-static int currentpc (CallInfo *ci) {
-  lua_assert(isLua(ci));
-  return pcRel(ci->u.l.savedpc, ci_func(ci)->p);
-}
-
-
-static int currentline (CallInfo *ci) {
-  return getfuncline(ci_func(ci)->p, currentpc(ci));
-}
-
-
-/*
-** If function yielded, its 'func' can be in the 'extra' field. The
-** next function restores 'func' to its correct value for debugging
-** purposes. (It exchanges 'func' and 'extra'; so, when called again,
-** after debugging, it also "re-restores" ** 'func' to its altered value.
-*/
-static void swapextra (lua_State *L) {
-  if (L->status == LUA_YIELD) {
-    CallInfo *ci = L->ci;  /* get function that yielded */
-    StkId temp = ci->func;  /* exchange its 'func' and 'extra' values */
-    ci->func = restorestack(L, ci->extra);
-    ci->extra = savestack(L, temp);
-  }
-}
-
-
-/*
-** This function can be called asynchronously (e.g. during a signal).
-** Fields 'oldpc', 'basehookcount', and 'hookcount' (set by
-** 'resethookcount') are for debug only, and it is no problem if they
-** get arbitrary values (causes at most one wrong hook call). 'hookmask'
-** is an atomic value. We assume that pointers are atomic too (e.g., gcc
-** ensures that for all platforms where it runs). Moreover, 'hook' is
-** always checked before being called (see 'luaD_hook').
-*/
-LUA_API void lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
-  if (func == NULL || mask == 0) {  /* turn off hooks? */
-    mask = 0;
-    func = NULL;
-  }
-  if (isLua(L->ci))
-    L->oldpc = L->ci->u.l.savedpc;
-  L->hook = func;
-  L->basehookcount = count;
-  resethookcount(L);
-  L->hookmask = cast_byte(mask);
-}
-
-
-LUA_API lua_Hook lua_gethook (lua_State *L) {
-  return L->hook;
-}
-
-
-LUA_API int lua_gethookmask (lua_State *L) {
-  return L->hookmask;
-}
-
-
-LUA_API int lua_gethookcount (lua_State *L) {
-  return L->basehookcount;
-}
-
-
-LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
-  int status;
-  CallInfo *ci;
-  if (level < 0) return 0;  /* invalid (negative) level */
-  lua_lock(L);
-  for (ci = L->ci; level > 0 && ci != &L->base_ci; ci = ci->previous)
-    level--;
-  if (level == 0 && ci != &L->base_ci) {  /* level found? */
-    status = 1;
-    ar->i_ci = ci;
-  }
-  else status = 0;  /* no such level */
-  lua_unlock(L);
-  return status;
-}
-
-
-static const char *upvalname (Proto *p, int uv) {
-  TString *s = check_exp(uv < p->sizeupvalues, p->upvalues[uv].name);
-  if (s == NULL) return "?";
-  else return getstr(s);
-}
-
-
-static const char *findvararg (CallInfo *ci, int n, StkId *pos) {
-  int nparams = clLvalue(ci->func)->p->numparams;
-  if (n >= cast_int(ci->u.l.base - ci->func) - nparams)
-    return NULL;  /* no such vararg */
-  else {
-    *pos = ci->func + nparams + n;
-    return "(*vararg)";  /* generic name for any vararg */
-  }
-}
-
-
-static const char *findlocal (lua_State *L, CallInfo *ci, int n,
-                              StkId *pos) {
-  const char *name = NULL;
-  StkId base;
-  if (isLua(ci)) {
-    if (n < 0)  /* access to vararg values? */
-      return findvararg(ci, -n, pos);
-    else {
-      base = ci->u.l.base;
-      name = luaF_getlocalname(ci_func(ci)->p, n, currentpc(ci));
-    }
-  }
-  else
-    base = ci->func + 1;
-  if (name == NULL) {  /* no 'standard' name? */
-    StkId limit = (ci == L->ci) ? L->top : ci->next->func;
-    if (limit - base >= n && n > 0)  /* is 'n' inside 'ci' stack? */
-      name = "(*temporary)";  /* generic name for any valid slot */
-    else
-      return NULL;  /* no name */
-  }
-  *pos = base + (n - 1);
-  return name;
-}
-
-
-LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
-  const char *name;
-  lua_lock(L);
-  swapextra(L);
-  if (ar == NULL) {  /* information about non-active function? */
-    if (!isLfunction(L->top - 1))  /* not a Lua function? */
-      name = NULL;
-    else  /* consider live variables at function start (parameters) */
-      name = luaF_getlocalname(clLvalue(L->top - 1)->p, n, 0);
-  }
-  else {  /* active function; get information through 'ar' */
-    StkId pos = NULL;  /* to avoid warnings */
-    name = findlocal(L, ar->i_ci, n, &pos);
-    if (name) {
-      setobj2s(L, L->top, pos);
-      api_incr_top(L);
-    }
-  }
-  swapextra(L);
-  lua_unlock(L);
-  return name;
-}
-
-
-LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
-  StkId pos = NULL;  /* to avoid warnings */
-  const char *name;
-  lua_lock(L);
-  swapextra(L);
-  name = findlocal(L, ar->i_ci, n, &pos);
-  if (name) {
-    setobjs2s(L, pos, L->top - 1);
-    L->top--;  /* pop value */
-  }
-  swapextra(L);
-  lua_unlock(L);
-  return name;
-}
-
-
-static void funcinfo (lua_Debug *ar, Closure *cl) {
-  if (noLuaClosure(cl)) {
-    ar->source = "=[C]";
-    ar->linedefined = -1;
-    ar->lastlinedefined = -1;
-    ar->what = "C";
-  }
-  else {
-    Proto *p = cl->l.p;
-    ar->source = p->source ? getstr(p->source) : "=?";
-    ar->linedefined = p->linedefined;
-    ar->lastlinedefined = p->lastlinedefined;
-    ar->what = (ar->linedefined == 0) ? "main" : "Lua";
-  }
-  luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
-}
-
-
-static void collectvalidlines (lua_State *L, Closure *f) {
-  if (noLuaClosure(f)) {
-    setnilvalue(L->top);
-    api_incr_top(L);
-  }
-  else {
-    int i;
-    TValue v;
-    int *lineinfo = f->l.p->lineinfo;
-    Table *t = luaH_new(L);  /* new table to store active lines */
-    sethvalue(L, L->top, t);  /* push it on stack */
-    api_incr_top(L);
-    setbvalue(&v, 1);  /* boolean 'true' to be the value of all indices */
-    for (i = 0; i < f->l.p->sizelineinfo; i++)  /* for all lines with code */
-      luaH_setint(L, t, lineinfo[i], &v);  /* table[line] = true */
-  }
-}
-
-
-static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
-                       Closure *f, CallInfo *ci) {
-  int status = 1;
-  for (; *what; what++) {
-    switch (*what) {
-      case 'S': {
-        funcinfo(ar, f);
-        break;
-      }
-      case 'l': {
-        ar->currentline = (ci && isLua(ci)) ? currentline(ci) : -1;
-        break;
-      }
-      case 'u': {
-        ar->nups = (f == NULL) ? 0 : f->c.nupvalues;
-        if (noLuaClosure(f)) {
-          ar->isvararg = 1;
-          ar->nparams = 0;
-        }
-        else {
-          ar->isvararg = f->l.p->is_vararg;
-          ar->nparams = f->l.p->numparams;
-        }
-        break;
-      }
-      case 't': {
-        ar->istailcall = (ci) ? ci->callstatus & CIST_TAIL : 0;
-        break;
-      }
-      case 'n': {
-        /* calling function is a known Lua function? */
-        if (ci && !(ci->callstatus & CIST_TAIL) && isLua(ci->previous))
-          ar->namewhat = getfuncname(L, ci->previous, &ar->name);
-        else
-          ar->namewhat = NULL;
-        if (ar->namewhat == NULL) {
-          ar->namewhat = "";  /* not found */
-          ar->name = NULL;
-        }
-        break;
-      }
-      case 'L':
-      case 'f':  /* handled by lua_getinfo */
-        break;
-      default: status = 0;  /* invalid option */
-    }
-  }
-  return status;
-}
-
-
-LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
-  int status;
-  Closure *cl;
-  CallInfo *ci;
-  StkId func;
-  lua_lock(L);
-  swapextra(L);
-  if (*what == '>') {
-    ci = NULL;
-    func = L->top - 1;
-    api_check(L, ttisfunction(func), "function expected");
-    what++;  /* skip the '>' */
-    L->top--;  /* pop function */
-  }
-  else {
-    ci = ar->i_ci;
-    func = ci->func;
-    lua_assert(ttisfunction(ci->func));
-  }
-  cl = ttisclosure(func) ? clvalue(func) : NULL;
-  status = auxgetinfo(L, what, ar, cl, ci);
-  if (strchr(what, 'f')) {
-    setobjs2s(L, L->top, func);
-    api_incr_top(L);
-  }
-  swapextra(L);  /* correct before option 'L', which can raise a mem. error */
-  if (strchr(what, 'L'))
-    collectvalidlines(L, cl);
-  lua_unlock(L);
-  return status;
-}
-
-
-/*
-** {======================================================
-** Symbolic Execution
-** =======================================================
-*/
-
-static const char *getobjname (Proto *p, int lastpc, int reg,
-                               const char **name);
-
-
-/*
-** find a "name" for the RK value 'c'
-*/
-static void kname (Proto *p, int pc, int c, const char **name) {
-  if (ISK(c)) {  /* is 'c' a constant? */
-    TValue *kvalue = &p->k[INDEXK(c)];
-    if (ttisstring(kvalue)) {  /* literal constant? */
-      *name = svalue(kvalue);  /* it is its own name */
-      return;
-    }
-    /* else no reasonable name found */
-  }
-  else {  /* 'c' is a register */
-    const char *what = getobjname(p, pc, c, name); /* search for 'c' */
-    if (what && *what == 'c') {  /* found a constant name? */
-      return;  /* 'name' already filled */
-    }
-    /* else no reasonable name found */
-  }
-  *name = "?";  /* no reasonable name found */
-}
-
-
-static int filterpc (int pc, int jmptarget) {
-  if (pc < jmptarget)  /* is code conditional (inside a jump)? */
-    return -1;  /* cannot know who sets that register */
-  else return pc;  /* current position sets that register */
-}
-
-
-/*
-** try to find last instruction before 'lastpc' that modified register 'reg'
-*/
-static int findsetreg (Proto *p, int lastpc, int reg) {
-  int pc;
-  int setreg = -1;  /* keep last instruction that changed 'reg' */
-  int jmptarget = 0;  /* any code before this address is conditional */
-  for (pc = 0; pc < lastpc; pc++) {
-    Instruction i = p->code[pc];
-    OpCode op = GET_OPCODE(i);
-    int a = GETARG_A(i);
-    switch (op) {
-      case OP_LOADNIL: {
-        int b = GETARG_B(i);
-        if (a <= reg && reg <= a + b)  /* set registers from 'a' to 'a+b' */
-          setreg = filterpc(pc, jmptarget);
-        break;
-      }
-      case OP_TFORCALL: {
-        if (reg >= a + 2)  /* affect all regs above its base */
-          setreg = filterpc(pc, jmptarget);
-        break;
-      }
-      case OP_CALL:
-      case OP_TAILCALL: {
-        if (reg >= a)  /* affect all registers above base */
-          setreg = filterpc(pc, jmptarget);
-        break;
-      }
-      case OP_JMP: {
-        int b = GETARG_sBx(i);
-        int dest = pc + 1 + b;
-        /* jump is forward and do not skip 'lastpc'? */
-        if (pc < dest && dest <= lastpc) {
-          if (dest > jmptarget)
-            jmptarget = dest;  /* update 'jmptarget' */
-        }
-        break;
-      }
-      default:
-        if (testAMode(op) && reg == a)  /* any instruction that set A */
-          setreg = filterpc(pc, jmptarget);
-        break;
-    }
-  }
-  return setreg;
-}
-
-
-static const char *getobjname (Proto *p, int lastpc, int reg,
-                               const char **name) {
-  int pc;
-  *name = luaF_getlocalname(p, reg + 1, lastpc);
-  if (*name)  /* is a local? */
-    return "local";
-  /* else try symbolic execution */
-  pc = findsetreg(p, lastpc, reg);
-  if (pc != -1) {  /* could find instruction? */
-    Instruction i = p->code[pc];
-    OpCode op = GET_OPCODE(i);
-    switch (op) {
-      case OP_MOVE: {
-        int b = GETARG_B(i);  /* move from 'b' to 'a' */
-        if (b < GETARG_A(i))
-          return getobjname(p, pc, b, name);  /* get name for 'b' */
-        break;
-      }
-      case OP_GETTABUP:
-      case OP_GETTABLE: {
-        int k = GETARG_C(i);  /* key index */
-        int t = GETARG_B(i);  /* table index */
-        const char *vn = (op == OP_GETTABLE)  /* name of indexed variable */
-                         ? luaF_getlocalname(p, t + 1, pc)
-                         : upvalname(p, t);
-        kname(p, pc, k, name);
-        return (vn && strcmp(vn, LUA_ENV) == 0) ? "global" : "field";
-      }
-      case OP_GETUPVAL: {
-        *name = upvalname(p, GETARG_B(i));
-        return "upvalue";
-      }
-      case OP_LOADK:
-      case OP_LOADKX: {
-        int b = (op == OP_LOADK) ? GETARG_Bx(i)
-                                 : GETARG_Ax(p->code[pc + 1]);
-        if (ttisstring(&p->k[b])) {
-          *name = svalue(&p->k[b]);
-          return "constant";
-        }
-        break;
-      }
-      case OP_SELF: {
-        int k = GETARG_C(i);  /* key index */
-        kname(p, pc, k, name);
-        return "method";
-      }
-      default: break;  /* go through to return NULL */
-    }
-  }
-  return NULL;  /* could not find reasonable name */
-}
-
-
-static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
-  TMS tm = (TMS)0;  /* to avoid warnings */
-  Proto *p = ci_func(ci)->p;  /* calling function */
-  int pc = currentpc(ci);  /* calling instruction index */
-  Instruction i = p->code[pc];  /* calling instruction */
-  if (ci->callstatus & CIST_HOOKED) {  /* was it called inside a hook? */
-    *name = "?";
-    return "hook";
-  }
-  switch (GET_OPCODE(i)) {
-    case OP_CALL:
-    case OP_TAILCALL:  /* get function name */
-      return getobjname(p, pc, GETARG_A(i), name);
-    case OP_TFORCALL: {  /* for iterator */
-      *name = "for iterator";
-       return "for iterator";
-    }
-    /* all other instructions can call only through metamethods */
-    case OP_SELF: case OP_GETTABUP: case OP_GETTABLE:
-      tm = TM_INDEX;
-      break;
-    case OP_SETTABUP: case OP_SETTABLE:
-      tm = TM_NEWINDEX;
-      break;
-    case OP_ADD: case OP_SUB: case OP_MUL: case OP_MOD:
-    case OP_POW: case OP_DIV: case OP_IDIV: case OP_BAND:
-    case OP_BOR: case OP_BXOR: case OP_SHL: case OP_SHR: {
-      int offset = cast_int(GET_OPCODE(i)) - cast_int(OP_ADD);  /* ORDER OP */
-      tm = cast(TMS, offset + cast_int(TM_ADD));  /* ORDER TM */
-      break;
-    }
-    case OP_UNM: tm = TM_UNM; break;
-    case OP_BNOT: tm = TM_BNOT; break;
-    case OP_LEN: tm = TM_LEN; break;
-    case OP_CONCAT: tm = TM_CONCAT; break;
-    case OP_EQ: tm = TM_EQ; break;
-    case OP_LT: tm = TM_LT; break;
-    case OP_LE: tm = TM_LE; break;
-    default: lua_assert(0);  /* other instructions cannot call a function */
-  }
-  *name = getstr(G(L)->tmname[tm]);
-  return "metamethod";
-}
-
-/* }====================================================== */
-
-
-
-/*
-** The subtraction of two potentially unrelated pointers is
-** not ISO C, but it should not crash a program; the subsequent
-** checks are ISO C and ensure a correct result.
-*/
-static int isinstack (CallInfo *ci, const TValue *o) {
-  ptrdiff_t i = o - ci->u.l.base;
-  return (0 <= i && i < (ci->top - ci->u.l.base) && ci->u.l.base + i == o);
-}
-
-
-/*
-** Checks whether value 'o' came from an upvalue. (That can only happen
-** with instructions OP_GETTABUP/OP_SETTABUP, which operate directly on
-** upvalues.)
-*/
-static const char *getupvalname (CallInfo *ci, const TValue *o,
-                                 const char **name) {
-  LClosure *c = ci_func(ci);
-  int i;
-  for (i = 0; i < c->nupvalues; i++) {
-    if (c->upvals[i]->v == o) {
-      *name = upvalname(c->p, i);
-      return "upvalue";
-    }
-  }
-  return NULL;
-}
-
-
-static const char *varinfo (lua_State *L, const TValue *o) {
-  const char *name = NULL;  /* to avoid warnings */
-  CallInfo *ci = L->ci;
-  const char *kind = NULL;
-  if (isLua(ci)) {
-    kind = getupvalname(ci, o, &name);  /* check whether 'o' is an upvalue */
-    if (!kind && isinstack(ci, o))  /* no? try a register */
-      kind = getobjname(ci_func(ci)->p, currentpc(ci),
-                        cast_int(o - ci->u.l.base), &name);
-  }
-  return (kind) ? luaO_pushfstring(L, " (%s '%s')", kind, name) : "";
-}
-
-
-l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
-  const char *t = luaT_objtypename(L, o);
-  luaG_runerror(L, "attempt to %s a %s value%s", op, t, varinfo(L, o));
-}
-
-
-l_noret luaG_concaterror (lua_State *L, const TValue *p1, const TValue *p2) {
-  if (ttisstring(p1) || cvt2str(p1)) p1 = p2;
-  luaG_typeerror(L, p1, "concatenate");
-}
-
-
-l_noret luaG_opinterror (lua_State *L, const TValue *p1,
-                         const TValue *p2, const char *msg) {
-  lua_Number temp;
-  if (!tonumber(p1, &temp))  /* first operand is wrong? */
-    p2 = p1;  /* now second is wrong */
-  luaG_typeerror(L, p2, msg);
-}
-
-
-/*
-** Error when both values are convertible to numbers, but not to integers
-*/
-l_noret luaG_tointerror (lua_State *L, const TValue *p1, const TValue *p2) {
-  lua_Integer temp;
-  if (!tointeger(p1, &temp))
-    p2 = p1;
-  luaG_runerror(L, "number%s has no integer representation", varinfo(L, p2));
-}
-
-
-l_noret luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
-  const char *t1 = luaT_objtypename(L, p1);
-  const char *t2 = luaT_objtypename(L, p2);
-  if (strcmp(t1, t2) == 0)
-    luaG_runerror(L, "attempt to compare two %s values", t1);
-  else
-    luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
-}
-
-
-/* add src:line information to 'msg' */
-const char *luaG_addinfo (lua_State *L, const char *msg, TString *src,
-                                        int line) {
-  char buff[LUA_IDSIZE];
-  if (src)
-    luaO_chunkid(buff, getstr(src), LUA_IDSIZE);
-  else {  /* no source available; use "?" instead */
-    buff[0] = '?'; buff[1] = '\0';
-  }
-  return luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
-}
-
-
-l_noret luaG_errormsg (lua_State *L) {
-  if (L->errfunc != 0) {  /* is there an error handling function? */
-    StkId errfunc = restorestack(L, L->errfunc);
-    setobjs2s(L, L->top, L->top - 1);  /* move argument */
-    setobjs2s(L, L->top - 1, errfunc);  /* push function */
-    L->top++;  /* assume EXTRA_STACK */
-    luaD_callnoyield(L, L->top - 2, 1);  /* call it */
-  }
-  luaD_throw(L, LUA_ERRRUN);
-}
-
-
-l_noret luaG_runerror (lua_State *L, const char *fmt, ...) {
-  CallInfo *ci = L->ci;
-  const char *msg;
-  va_list argp;
-  va_start(argp, fmt);
-  msg = luaO_pushvfstring(L, fmt, argp);  /* format message */
-  va_end(argp);
-  if (isLua(ci))  /* if Lua function, add source:line information */
-    luaG_addinfo(L, msg, ci_func(ci)->p->source, currentline(ci));
-  luaG_errormsg(L);
-}
-
-
-void luaG_traceexec (lua_State *L) {
-  CallInfo *ci = L->ci;
-  lu_byte mask = L->hookmask;
-  int counthook = (--L->hookcount == 0 && (mask & LUA_MASKCOUNT));
-  if (counthook)
-    resethookcount(L);  /* reset count */
-  else if (!(mask & LUA_MASKLINE))
-    return;  /* no line hook and count != 0; nothing to be done */
-  if (ci->callstatus & CIST_HOOKYIELD) {  /* called hook last time? */
-    ci->callstatus &= ~CIST_HOOKYIELD;  /* erase mark */
-    return;  /* do not call hook again (VM yielded, so it did not move) */
-  }
-  if (counthook)
-    luaD_hook(L, LUA_HOOKCOUNT, -1);  /* call count hook */
-  if (mask & LUA_MASKLINE) {
-    Proto *p = ci_func(ci)->p;
-    int npc = pcRel(ci->u.l.savedpc, p);
-    int newline = getfuncline(p, npc);
-    if (npc == 0 ||  /* call linehook when enter a new function, */
-        ci->u.l.savedpc <= L->oldpc ||  /* when jump back (loop), or when */
-        newline != getfuncline(p, pcRel(L->oldpc, p)))  /* enter a new line */
-      luaD_hook(L, LUA_HOOKLINE, newline);  /* call line hook */
-  }
-  L->oldpc = ci->u.l.savedpc;
-  if (L->status == LUA_YIELD) {  /* did hook yield? */
-    if (counthook)
-      L->hookcount = 1;  /* undo decrement to zero */
-    ci->u.l.savedpc--;  /* undo increment (resume will increment it again) */
-    ci->callstatus |= CIST_HOOKYIELD;  /* mark that it yielded */
-    ci->func = L->top - 1;  /* protect stack below results */
-    luaD_throw(L, LUA_YIELD);
-  }
-}
-