Renamed lib to deps so github will ignore it for language stats

1 files changed, 0 insertions, 477 deletions

diff --git a/lib/LuaJIT/src/lj_meta.c b/lib/LuaJIT/src/lj_meta.c
deleted file mode 100644
index 0bd4d84..0000000
--- a/lib/LuaJIT/src/lj_meta.c
+++ /dev/null
@@ -1,477 +0,0 @@
-/*
-** Metamethod handling.
-** Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h
-**
-** Portions taken verbatim or adapted from the Lua interpreter.
-** Copyright (C) 1994-2008 Lua.org, PUC-Rio. See Copyright Notice in lua.h
-*/
-
-#define lj_meta_c
-#define LUA_CORE
-
-#include "lj_obj.h"
-#include "lj_gc.h"
-#include "lj_err.h"
-#include "lj_buf.h"
-#include "lj_str.h"
-#include "lj_tab.h"
-#include "lj_meta.h"
-#include "lj_frame.h"
-#include "lj_bc.h"
-#include "lj_vm.h"
-#include "lj_strscan.h"
-#include "lj_strfmt.h"
-#include "lj_lib.h"
-
-/* -- Metamethod handling ------------------------------------------------- */
-
-/* String interning of metamethod names for fast indexing. */
-void lj_meta_init(lua_State *L)
-{
-#define MMNAME(name)	"__" #name
-  const char *metanames = MMDEF(MMNAME);
-#undef MMNAME
-  global_State *g = G(L);
-  const char *p, *q;
-  uint32_t mm;
-  for (mm = 0, p = metanames; *p; mm++, p = q) {
-    GCstr *s;
-    for (q = p+2; *q && *q != '_'; q++) ;
-    s = lj_str_new(L, p, (size_t)(q-p));
-    /* NOBARRIER: g->gcroot[] is a GC root. */
-    setgcref(g->gcroot[GCROOT_MMNAME+mm], obj2gco(s));
-  }
-}
-
-/* Negative caching of a few fast metamethods. See the lj_meta_fast() macro. */
-cTValue *lj_meta_cache(GCtab *mt, MMS mm, GCstr *name)
-{
-  cTValue *mo = lj_tab_getstr(mt, name);
-  lua_assert(mm <= MM_FAST);
-  if (!mo || tvisnil(mo)) {  /* No metamethod? */
-    mt->nomm |= (uint8_t)(1u<<mm);  /* Set negative cache flag. */
-    return NULL;
-  }
-  return mo;
-}
-
-/* Lookup metamethod for object. */
-cTValue *lj_meta_lookup(lua_State *L, cTValue *o, MMS mm)
-{
-  GCtab *mt;
-  if (tvistab(o))
-    mt = tabref(tabV(o)->metatable);
-  else if (tvisudata(o))
-    mt = tabref(udataV(o)->metatable);
-  else
-    mt = tabref(basemt_obj(G(L), o));
-  if (mt) {
-    cTValue *mo = lj_tab_getstr(mt, mmname_str(G(L), mm));
-    if (mo)
-      return mo;
-  }
-  return niltv(L);
-}
-
-#if LJ_HASFFI
-/* Tailcall from C function. */
-int lj_meta_tailcall(lua_State *L, cTValue *tv)
-{
-  TValue *base = L->base;
-  TValue *top = L->top;
-  const BCIns *pc = frame_pc(base-1);  /* Preserve old PC from frame. */
-  copyTV(L, base-1-LJ_FR2, tv);  /* Replace frame with new object. */
-  if (LJ_FR2)
-    (top++)->u64 = LJ_CONT_TAILCALL;
-  else
-    top->u32.lo = LJ_CONT_TAILCALL;
-  setframe_pc(top++, pc);
-  if (LJ_FR2) top++;
-  setframe_gc(top, obj2gco(L), LJ_TTHREAD);  /* Dummy frame object. */
-  setframe_ftsz(top, ((char *)(top+1) - (char *)base) + FRAME_CONT);
-  L->base = L->top = top+1;
-  /*
-  ** before:   [old_mo|PC]    [... ...]
-  **                         ^base     ^top
-  ** after:    [new_mo|itype] [... ...] [NULL|PC] [dummy|delta]
-  **                                                           ^base/top
-  ** tailcall: [new_mo|PC]    [... ...]
-  **                         ^base     ^top
-  */
-  return 0;
-}
-#endif
-
-/* Setup call to metamethod to be run by Assembler VM. */
-static TValue *mmcall(lua_State *L, ASMFunction cont, cTValue *mo,
-		    cTValue *a, cTValue *b)
-{
-  /*
-  **           |-- framesize -> top       top+1       top+2 top+3
-  ** before:   [func slots ...]
-  ** mm setup: [func slots ...] [cont|?]  [mo|tmtype] [a]   [b]
-  ** in asm:   [func slots ...] [cont|PC] [mo|delta]  [a]   [b]
-  **           ^-- func base                          ^-- mm base
-  ** after mm: [func slots ...]           [result]
-  **                ^-- copy to base[PC_RA] --/     for lj_cont_ra
-  **                          istruecond + branch   for lj_cont_cond*
-  **                                       ignore   for lj_cont_nop
-  ** next PC:  [func slots ...]
-  */
-  TValue *top = L->top;
-  if (curr_funcisL(L)) top = curr_topL(L);
-  setcont(top++, cont);  /* Assembler VM stores PC in upper word or FR2. */
-  if (LJ_FR2) setnilV(top++);
-  copyTV(L, top++, mo);  /* Store metamethod and two arguments. */
-  if (LJ_FR2) setnilV(top++);
-  copyTV(L, top, a);
-  copyTV(L, top+1, b);
-  return top;  /* Return new base. */
-}
-
-/* -- C helpers for some instructions, called from assembler VM ----------- */
-
-/* Helper for TGET*. __index chain and metamethod. */
-cTValue *lj_meta_tget(lua_State *L, cTValue *o, cTValue *k)
-{
-  int loop;
-  for (loop = 0; loop < LJ_MAX_IDXCHAIN; loop++) {
-    cTValue *mo;
-    if (LJ_LIKELY(tvistab(o))) {
-      GCtab *t = tabV(o);
-      cTValue *tv = lj_tab_get(L, t, k);
-      if (!tvisnil(tv) ||
-	  !(mo = lj_meta_fast(L, tabref(t->metatable), MM_index)))
-	return tv;
-    } else if (tvisnil(mo = lj_meta_lookup(L, o, MM_index))) {
-      lj_err_optype(L, o, LJ_ERR_OPINDEX);
-      return NULL;  /* unreachable */
-    }
-    if (tvisfunc(mo)) {
-      L->top = mmcall(L, lj_cont_ra, mo, o, k);
-      return NULL;  /* Trigger metamethod call. */
-    }
-    o = mo;
-  }
-  lj_err_msg(L, LJ_ERR_GETLOOP);
-  return NULL;  /* unreachable */
-}
-
-/* Helper for TSET*. __newindex chain and metamethod. */
-TValue *lj_meta_tset(lua_State *L, cTValue *o, cTValue *k)
-{
-  TValue tmp;
-  int loop;
-  for (loop = 0; loop < LJ_MAX_IDXCHAIN; loop++) {
-    cTValue *mo;
-    if (LJ_LIKELY(tvistab(o))) {
-      GCtab *t = tabV(o);
-      cTValue *tv = lj_tab_get(L, t, k);
-      if (LJ_LIKELY(!tvisnil(tv))) {
-	t->nomm = 0;  /* Invalidate negative metamethod cache. */
-	lj_gc_anybarriert(L, t);
-	return (TValue *)tv;
-      } else if (!(mo = lj_meta_fast(L, tabref(t->metatable), MM_newindex))) {
-	t->nomm = 0;  /* Invalidate negative metamethod cache. */
-	lj_gc_anybarriert(L, t);
-	if (tv != niltv(L))
-	  return (TValue *)tv;
-	if (tvisnil(k)) lj_err_msg(L, LJ_ERR_NILIDX);
-	else if (tvisint(k)) { setnumV(&tmp, (lua_Number)intV(k)); k = &tmp; }
-	else if (tvisnum(k) && tvisnan(k)) lj_err_msg(L, LJ_ERR_NANIDX);
-	return lj_tab_newkey(L, t, k);
-      }
-    } else if (tvisnil(mo = lj_meta_lookup(L, o, MM_newindex))) {
-      lj_err_optype(L, o, LJ_ERR_OPINDEX);
-      return NULL;  /* unreachable */
-    }
-    if (tvisfunc(mo)) {
-      L->top = mmcall(L, lj_cont_nop, mo, o, k);
-      /* L->top+2 = v filled in by caller. */
-      return NULL;  /* Trigger metamethod call. */
-    }
-    copyTV(L, &tmp, mo);
-    o = &tmp;
-  }
-  lj_err_msg(L, LJ_ERR_SETLOOP);
-  return NULL;  /* unreachable */
-}
-
-static cTValue *str2num(cTValue *o, TValue *n)
-{
-  if (tvisnum(o))
-    return o;
-  else if (tvisint(o))
-    return (setnumV(n, (lua_Number)intV(o)), n);
-  else if (tvisstr(o) && lj_strscan_num(strV(o), n))
-    return n;
-  else
-    return NULL;
-}
-
-/* Helper for arithmetic instructions. Coercion, metamethod. */
-TValue *lj_meta_arith(lua_State *L, TValue *ra, cTValue *rb, cTValue *rc,
-		      BCReg op)
-{
-  MMS mm = bcmode_mm(op);
-  TValue tempb, tempc;
-  cTValue *b, *c;
-  if ((b = str2num(rb, &tempb)) != NULL &&
-      (c = str2num(rc, &tempc)) != NULL) {  /* Try coercion first. */
-    setnumV(ra, lj_vm_foldarith(numV(b), numV(c), (int)mm-MM_add));
-    return NULL;
-  } else {
-    cTValue *mo = lj_meta_lookup(L, rb, mm);
-    if (tvisnil(mo)) {
-      mo = lj_meta_lookup(L, rc, mm);
-      if (tvisnil(mo)) {
-	if (str2num(rb, &tempb) == NULL) rc = rb;
-	lj_err_optype(L, rc, LJ_ERR_OPARITH);
-	return NULL;  /* unreachable */
-      }
-    }
-    return mmcall(L, lj_cont_ra, mo, rb, rc);
-  }
-}
-
-/* Helper for CAT. Coercion, iterative concat, __concat metamethod. */
-TValue *lj_meta_cat(lua_State *L, TValue *top, int left)
-{
-  int fromc = 0;
-  if (left < 0) { left = -left; fromc = 1; }
-  do {
-    if (!(tvisstr(top) || tvisnumber(top)) ||
-	!(tvisstr(top-1) || tvisnumber(top-1))) {
-      cTValue *mo = lj_meta_lookup(L, top-1, MM_concat);
-      if (tvisnil(mo)) {
-	mo = lj_meta_lookup(L, top, MM_concat);
-	if (tvisnil(mo)) {
-	  if (tvisstr(top-1) || tvisnumber(top-1)) top++;
-	  lj_err_optype(L, top-1, LJ_ERR_OPCAT);
-	  return NULL;  /* unreachable */
-	}
-      }
-      /* One of the top two elements is not a string, call __cat metamethod:
-      **
-      ** before:    [...][CAT stack .........................]
-      **                                 top-1     top         top+1 top+2
-      ** pick two:  [...][CAT stack ...] [o1]      [o2]
-      ** setup mm:  [...][CAT stack ...] [cont|?]  [mo|tmtype] [o1]  [o2]
-      ** in asm:    [...][CAT stack ...] [cont|PC] [mo|delta]  [o1]  [o2]
-      **            ^-- func base                              ^-- mm base
-      ** after mm:  [...][CAT stack ...] <--push-- [result]
-      ** next step: [...][CAT stack .............]
-      */
-      copyTV(L, top+2*LJ_FR2+2, top);  /* Carefully ordered stack copies! */
-      copyTV(L, top+2*LJ_FR2+1, top-1);
-      copyTV(L, top+LJ_FR2, mo);
-      setcont(top-1, lj_cont_cat);
-      if (LJ_FR2) { setnilV(top); setnilV(top+2); top += 2; }
-      return top+1;  /* Trigger metamethod call. */
-    } else {
-      /* Pick as many strings as possible from the top and concatenate them:
-      **
-      ** before:    [...][CAT stack ...........................]
-      ** pick str:  [...][CAT stack ...] [...... strings ......]
-      ** concat:    [...][CAT stack ...] [result]
-      ** next step: [...][CAT stack ............]
-      */
-      TValue *e, *o = top;
-      uint64_t tlen = tvisstr(o) ? strV(o)->len : STRFMT_MAXBUF_NUM;
-      SBuf *sb;
-      do {
-	o--; tlen += tvisstr(o) ? strV(o)->len : STRFMT_MAXBUF_NUM;
-      } while (--left > 0 && (tvisstr(o-1) || tvisnumber(o-1)));
-      if (tlen >= LJ_MAX_STR) lj_err_msg(L, LJ_ERR_STROV);
-      sb = lj_buf_tmp_(L);
-      lj_buf_more(sb, (MSize)tlen);
-      for (e = top, top = o; o <= e; o++) {
-	if (tvisstr(o)) {
-	  GCstr *s = strV(o);
-	  MSize len = s->len;
-	  lj_buf_putmem(sb, strdata(s), len);
-	} else if (tvisint(o)) {
-	  lj_strfmt_putint(sb, intV(o));
-	} else {
-	  lj_strfmt_putfnum(sb, STRFMT_G14, numV(o));
-	}
-      }
-      setstrV(L, top, lj_buf_str(L, sb));
-    }
-  } while (left >= 1);
-  if (LJ_UNLIKELY(G(L)->gc.total >= G(L)->gc.threshold)) {
-    if (!fromc) L->top = curr_topL(L);
-    lj_gc_step(L);
-  }
-  return NULL;
-}
-
-/* Helper for LEN. __len metamethod. */
-TValue * LJ_FASTCALL lj_meta_len(lua_State *L, cTValue *o)
-{
-  cTValue *mo = lj_meta_lookup(L, o, MM_len);
-  if (tvisnil(mo)) {
-    if (LJ_52 && tvistab(o))
-      tabref(tabV(o)->metatable)->nomm |= (uint8_t)(1u<<MM_len);
-    else
-      lj_err_optype(L, o, LJ_ERR_OPLEN);
-    return NULL;
-  }
-  return mmcall(L, lj_cont_ra, mo, o, LJ_52 ? o : niltv(L));
-}
-
-/* Helper for equality comparisons. __eq metamethod. */
-TValue *lj_meta_equal(lua_State *L, GCobj *o1, GCobj *o2, int ne)
-{
-  /* Field metatable must be at same offset for GCtab and GCudata! */
-  cTValue *mo = lj_meta_fast(L, tabref(o1->gch.metatable), MM_eq);
-  if (mo) {
-    TValue *top;
-    uint32_t it;
-    if (tabref(o1->gch.metatable) != tabref(o2->gch.metatable)) {
-      cTValue *mo2 = lj_meta_fast(L, tabref(o2->gch.metatable), MM_eq);
-      if (mo2 == NULL || !lj_obj_equal(mo, mo2))
-	return (TValue *)(intptr_t)ne;
-    }
-    top = curr_top(L);
-    setcont(top++, ne ? lj_cont_condf : lj_cont_condt);
-    if (LJ_FR2) setnilV(top++);
-    copyTV(L, top++, mo);
-    if (LJ_FR2) setnilV(top++);
-    it = ~(uint32_t)o1->gch.gct;
-    setgcV(L, top, o1, it);
-    setgcV(L, top+1, o2, it);
-    return top;  /* Trigger metamethod call. */
-  }
-  return (TValue *)(intptr_t)ne;
-}
-
-#if LJ_HASFFI
-TValue * LJ_FASTCALL lj_meta_equal_cd(lua_State *L, BCIns ins)
-{
-  ASMFunction cont = (bc_op(ins) & 1) ? lj_cont_condf : lj_cont_condt;
-  int op = (int)bc_op(ins) & ~1;
-  TValue tv;
-  cTValue *mo, *o2, *o1 = &L->base[bc_a(ins)];
-  cTValue *o1mm = o1;
-  if (op == BC_ISEQV) {
-    o2 = &L->base[bc_d(ins)];
-    if (!tviscdata(o1mm)) o1mm = o2;
-  } else if (op == BC_ISEQS) {
-    setstrV(L, &tv, gco2str(proto_kgc(curr_proto(L), ~(ptrdiff_t)bc_d(ins))));
-    o2 = &tv;
-  } else if (op == BC_ISEQN) {
-    o2 = &mref(curr_proto(L)->k, cTValue)[bc_d(ins)];
-  } else {
-    lua_assert(op == BC_ISEQP);
-    setpriV(&tv, ~bc_d(ins));
-    o2 = &tv;
-  }
-  mo = lj_meta_lookup(L, o1mm, MM_eq);
-  if (LJ_LIKELY(!tvisnil(mo)))
-    return mmcall(L, cont, mo, o1, o2);
-  else
-    return (TValue *)(intptr_t)(bc_op(ins) & 1);
-}
-#endif
-
-/* Helper for ordered comparisons. String compare, __lt/__le metamethods. */
-TValue *lj_meta_comp(lua_State *L, cTValue *o1, cTValue *o2, int op)
-{
-  if (LJ_HASFFI && (tviscdata(o1) || tviscdata(o2))) {
-    ASMFunction cont = (op & 1) ? lj_cont_condf : lj_cont_condt;
-    MMS mm = (op & 2) ? MM_le : MM_lt;
-    cTValue *mo = lj_meta_lookup(L, tviscdata(o1) ? o1 : o2, mm);
-    if (LJ_UNLIKELY(tvisnil(mo))) goto err;
-    return mmcall(L, cont, mo, o1, o2);
-  } else if (LJ_52 || itype(o1) == itype(o2)) {
-    /* Never called with two numbers. */
-    if (tvisstr(o1) && tvisstr(o2)) {
-      int32_t res = lj_str_cmp(strV(o1), strV(o2));
-      return (TValue *)(intptr_t)(((op&2) ? res <= 0 : res < 0) ^ (op&1));
-    } else {
-    trymt:
-      while (1) {
-	ASMFunction cont = (op & 1) ? lj_cont_condf : lj_cont_condt;
-	MMS mm = (op & 2) ? MM_le : MM_lt;
-	cTValue *mo = lj_meta_lookup(L, o1, mm);
-#if LJ_52
-	if (tvisnil(mo) && tvisnil((mo = lj_meta_lookup(L, o2, mm))))
-#else
-	cTValue *mo2 = lj_meta_lookup(L, o2, mm);
-	if (tvisnil(mo) || !lj_obj_equal(mo, mo2))
-#endif
-	{
-	  if (op & 2) {  /* MM_le not found: retry with MM_lt. */
-	    cTValue *ot = o1; o1 = o2; o2 = ot;  /* Swap operands. */
-	    op ^= 3;  /* Use LT and flip condition. */
-	    continue;
-	  }
-	  goto err;
-	}
-	return mmcall(L, cont, mo, o1, o2);
-      }
-    }
-  } else if (tvisbool(o1) && tvisbool(o2)) {
-    goto trymt;
-  } else {
-  err:
-    lj_err_comp(L, o1, o2);
-    return NULL;
-  }
-}
-
-/* Helper for ISTYPE and ISNUM. Implicit coercion or error. */
-void lj_meta_istype(lua_State *L, BCReg ra, BCReg tp)
-{
-  L->top = curr_topL(L);
-  ra++; tp--;
-  lua_assert(LJ_DUALNUM || tp != ~LJ_TNUMX);  /* ISTYPE -> ISNUM broken. */
-  if (LJ_DUALNUM && tp == ~LJ_TNUMX) lj_lib_checkint(L, ra);
-  else if (tp == ~LJ_TNUMX+1) lj_lib_checknum(L, ra);
-  else if (tp == ~LJ_TSTR) lj_lib_checkstr(L, ra);
-  else lj_err_argtype(L, ra, lj_obj_itypename[tp]);
-}
-
-/* Helper for calls. __call metamethod. */
-void lj_meta_call(lua_State *L, TValue *func, TValue *top)
-{
-  cTValue *mo = lj_meta_lookup(L, func, MM_call);
-  TValue *p;
-  if (!tvisfunc(mo))
-    lj_err_optype_call(L, func);
-  for (p = top; p > func+2*LJ_FR2; p--) copyTV(L, p, p-1);
-  if (LJ_FR2) copyTV(L, func+2, func);
-  copyTV(L, func, mo);
-}
-
-/* Helper for FORI. Coercion. */
-void LJ_FASTCALL lj_meta_for(lua_State *L, TValue *o)
-{
-  if (!lj_strscan_numberobj(o)) lj_err_msg(L, LJ_ERR_FORINIT);
-  if (!lj_strscan_numberobj(o+1)) lj_err_msg(L, LJ_ERR_FORLIM);
-  if (!lj_strscan_numberobj(o+2)) lj_err_msg(L, LJ_ERR_FORSTEP);
-  if (LJ_DUALNUM) {
-    /* Ensure all slots are integers or all slots are numbers. */
-    int32_t k[3];
-    int nint = 0;
-    ptrdiff_t i;
-    for (i = 0; i <= 2; i++) {
-      if (tvisint(o+i)) {
-	k[i] = intV(o+i); nint++;
-      } else {
-	k[i] = lj_num2int(numV(o+i)); nint += ((lua_Number)k[i] == numV(o+i));
-      }
-    }
-    if (nint == 3) {  /* Narrow to integers. */
-      setintV(o, k[0]);
-      setintV(o+1, k[1]);
-      setintV(o+2, k[2]);
-    } else if (nint != 0) {  /* Widen to numbers. */
-      if (tvisint(o)) setnumV(o, (lua_Number)intV(o));
-      if (tvisint(o+1)) setnumV(o+1, (lua_Number)intV(o+1));
-      if (tvisint(o+2)) setnumV(o+2, (lua_Number)intV(o+2));
-    }
-  }
-}
-