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Update LUA

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This commit is contained in:
Andrew Pamment 2016-12-10 07:31:44 +10:00
parent 12f874c015
commit 3237c6de14
28 changed files with 975 additions and 594 deletions
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7
lua/Makefile
View File

@ -26,7 +26,7 @@ MYOBJS=
# == END OF USER SETTINGS -- NO NEED TO CHANGE ANYTHING BELOW THIS LINE =======
PLATS= aix bsd c89 freebsd generic linux macosx mingw posix solaris minix
PLATS= aix bsd c89 freebsd generic linux macosx mingw posix solaris
LUA_A= liblua.a
CORE_O= lapi.o lcode.o lctype.o ldebug.o ldo.o ldump.o lfunc.o lgc.o llex.o \
@ -101,11 +101,8 @@ c89:
@echo ''
minix:
$(MAKE) $(ALL) CC="clang" SYSCFLAGS="-DLUA_USE_LINUX" SYSLIBS="-L/usr/pkg/lib -Wl,-E -lreadline"
freebsd:
$(MAKE) $(ALL) CC="cc" SYSCFLAGS="-DLUA_USE_LINUX -I/usr/local/include" SYSLIBS="-Wl,-E -L/usr/local/lib -lreadline"
$(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_LINUX" SYSLIBS="-Wl,-E -lreadline"
generic: $(ALL)

48
lua/lapi.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lapi.c,v 2.257 2015/11/02 18:48:07 roberto Exp $
** $Id: lapi.c,v 2.259 2016/02/29 14:27:14 roberto Exp $
** Lua API
** See Copyright Notice in lua.h
*/
@ -378,9 +378,9 @@ LUA_API const char *lua_tolstring (lua_State *L, int idx, size_t *len) {
return NULL;
}
lua_lock(L); /* 'luaO_tostring' may create a new string */
luaO_tostring(L, o);
luaC_checkGC(L);
o = index2addr(L, idx); /* previous call may reallocate the stack */
luaO_tostring(L, o);
lua_unlock(L);
}
if (len != NULL)
@ -479,10 +479,10 @@ LUA_API void lua_pushinteger (lua_State *L, lua_Integer n) {
LUA_API const char *lua_pushlstring (lua_State *L, const char *s, size_t len) {
TString *ts;
lua_lock(L);
luaC_checkGC(L);
ts = (len == 0) ? luaS_new(L, "") : luaS_newlstr(L, s, len);
setsvalue2s(L, L->top, ts);
api_incr_top(L);
luaC_checkGC(L);
lua_unlock(L);
return getstr(ts);
}
@ -494,12 +494,12 @@ LUA_API const char *lua_pushstring (lua_State *L, const char *s) {
setnilvalue(L->top);
else {
TString *ts;
luaC_checkGC(L);
ts = luaS_new(L, s);
setsvalue2s(L, L->top, ts);
s = getstr(ts); /* internal copy's address */
}
api_incr_top(L);
luaC_checkGC(L);
lua_unlock(L);
return s;
}
@ -509,8 +509,8 @@ LUA_API const char *lua_pushvfstring (lua_State *L, const char *fmt,
va_list argp) {
const char *ret;
lua_lock(L);
luaC_checkGC(L);
ret = luaO_pushvfstring(L, fmt, argp);
luaC_checkGC(L);
lua_unlock(L);
return ret;
}
@ -520,10 +520,10 @@ LUA_API const char *lua_pushfstring (lua_State *L, const char *fmt, ...) {
const char *ret;
va_list argp;
lua_lock(L);
luaC_checkGC(L);
va_start(argp, fmt);
ret = luaO_pushvfstring(L, fmt, argp);
va_end(argp);
luaC_checkGC(L);
lua_unlock(L);
return ret;
}
@ -538,7 +538,6 @@ LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) {
CClosure *cl;
api_checknelems(L, n);
api_check(L, n <= MAXUPVAL, "upvalue index too large");
luaC_checkGC(L);
cl = luaF_newCclosure(L, n);
cl->f = fn;
L->top -= n;
@ -549,6 +548,7 @@ LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) {
setclCvalue(L, L->top, cl);
}
api_incr_top(L);
luaC_checkGC(L);
lua_unlock(L);
}
@ -585,16 +585,16 @@ LUA_API int lua_pushthread (lua_State *L) {
static int auxgetstr (lua_State *L, const TValue *t, const char *k) {
const TValue *aux;
const TValue *slot;
TString *str = luaS_new(L, k);
if (luaV_fastget(L, t, str, aux, luaH_getstr)) {
setobj2s(L, L->top, aux);
if (luaV_fastget(L, t, str, slot, luaH_getstr)) {
setobj2s(L, L->top, slot);
api_incr_top(L);
}
else {
setsvalue2s(L, L->top, str);
api_incr_top(L);
luaV_finishget(L, t, L->top - 1, L->top - 1, aux);
luaV_finishget(L, t, L->top - 1, L->top - 1, slot);
}
lua_unlock(L);
return ttnov(L->top - 1);
@ -626,17 +626,17 @@ LUA_API int lua_getfield (lua_State *L, int idx, const char *k) {
LUA_API int lua_geti (lua_State *L, int idx, lua_Integer n) {
StkId t;
const TValue *aux;
const TValue *slot;
lua_lock(L);
t = index2addr(L, idx);
if (luaV_fastget(L, t, n, aux, luaH_getint)) {
setobj2s(L, L->top, aux);
if (luaV_fastget(L, t, n, slot, luaH_getint)) {
setobj2s(L, L->top, slot);
api_incr_top(L);
}
else {
setivalue(L->top, n);
api_incr_top(L);
luaV_finishget(L, t, L->top - 1, L->top - 1, aux);
luaV_finishget(L, t, L->top - 1, L->top - 1, slot);
}
lua_unlock(L);
return ttnov(L->top - 1);
@ -683,12 +683,12 @@ LUA_API int lua_rawgetp (lua_State *L, int idx, const void *p) {
LUA_API void lua_createtable (lua_State *L, int narray, int nrec) {
Table *t;
lua_lock(L);
luaC_checkGC(L);
t = luaH_new(L);
sethvalue(L, L->top, t);
api_incr_top(L);
if (narray > 0 || nrec > 0)
luaH_resize(L, t, narray, nrec);
luaC_checkGC(L);
lua_unlock(L);
}
@ -740,15 +740,15 @@ LUA_API int lua_getuservalue (lua_State *L, int idx) {
** t[k] = value at the top of the stack (where 'k' is a string)
*/
static void auxsetstr (lua_State *L, const TValue *t, const char *k) {
const TValue *aux;
const TValue *slot;
TString *str = luaS_new(L, k);
api_checknelems(L, 1);
if (luaV_fastset(L, t, str, aux, luaH_getstr, L->top - 1))
if (luaV_fastset(L, t, str, slot, luaH_getstr, L->top - 1))
L->top--; /* pop value */
else {
setsvalue2s(L, L->top, str); /* push 'str' (to make it a TValue) */
api_incr_top(L);
luaV_finishset(L, t, L->top - 1, L->top - 2, aux);
luaV_finishset(L, t, L->top - 1, L->top - 2, slot);
L->top -= 2; /* pop value and key */
}
lua_unlock(L); /* lock done by caller */
@ -781,16 +781,16 @@ LUA_API void lua_setfield (lua_State *L, int idx, const char *k) {
LUA_API void lua_seti (lua_State *L, int idx, lua_Integer n) {
StkId t;
const TValue *aux;
const TValue *slot;
lua_lock(L);
api_checknelems(L, 1);
t = index2addr(L, idx);
if (luaV_fastset(L, t, n, aux, luaH_getint, L->top - 1))
if (luaV_fastset(L, t, n, slot, luaH_getint, L->top - 1))
L->top--; /* pop value */
else {
setivalue(L->top, n);
api_incr_top(L);
luaV_finishset(L, t, L->top - 1, L->top - 2, aux);
luaV_finishset(L, t, L->top - 1, L->top - 2, slot);
L->top -= 2; /* pop value and key */
}
lua_unlock(L);
@ -1140,7 +1140,6 @@ LUA_API void lua_concat (lua_State *L, int n) {
lua_lock(L);
api_checknelems(L, n);
if (n >= 2) {
luaC_checkGC(L);
luaV_concat(L, n);
}
else if (n == 0) { /* push empty string */
@ -1148,6 +1147,7 @@ LUA_API void lua_concat (lua_State *L, int n) {
api_incr_top(L);
}
/* else n == 1; nothing to do */
luaC_checkGC(L);
lua_unlock(L);
}
@ -1183,10 +1183,10 @@ LUA_API void lua_setallocf (lua_State *L, lua_Alloc f, void *ud) {
LUA_API void *lua_newuserdata (lua_State *L, size_t size) {
Udata *u;
lua_lock(L);
luaC_checkGC(L);
u = luaS_newudata(L, size);
setuvalue(L, L->top, u);
api_incr_top(L);
luaC_checkGC(L);
lua_unlock(L);
return getudatamem(u);
}

29
lua/lauxlib.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lauxlib.c,v 1.284 2015/11/19 19:16:22 roberto Exp $
** $Id: lauxlib.c,v 1.286 2016/01/08 15:33:09 roberto Exp $
** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h
*/
@ -17,7 +17,8 @@
#include <string.h>
/* This file uses only the official API of Lua.
/*
** This file uses only the official API of Lua.
** Any function declared here could be written as an application function.
*/
@ -198,6 +199,10 @@ static void tag_error (lua_State *L, int arg, int tag) {
}
/*
** The use of 'lua_pushfstring' ensures this function does not
** need reserved stack space when called.
*/
LUALIB_API void luaL_where (lua_State *L, int level) {
lua_Debug ar;
if (lua_getstack(L, level, &ar)) { /* check function at level */
@ -207,10 +212,15 @@ LUALIB_API void luaL_where (lua_State *L, int level) {
return;
}
}
lua_pushliteral(L, ""); /* else, no information available... */
lua_pushfstring(L, ""); /* else, no information available... */
}
/*
** Again, the use of 'lua_pushvfstring' ensures this function does
** not need reserved stack space when called. (At worst, it generates
** an error with "stack overflow" instead of the given message.)
*/
LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) {
va_list argp;
va_start(argp, fmt);
@ -349,10 +359,15 @@ LUALIB_API int luaL_checkoption (lua_State *L, int arg, const char *def,
}
/*
** Ensures the stack has at least 'space' extra slots, raising an error
** if it cannot fulfill the request. (The error handling needs a few
** extra slots to format the error message. In case of an error without
** this extra space, Lua will generate the same 'stack overflow' error,
** but without 'msg'.)
*/
LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg) {
/* keep some extra space to run error routines, if needed */
const int extra = LUA_MINSTACK;
if (!lua_checkstack(L, space + extra)) {
if (!lua_checkstack(L, space)) {
if (msg)
luaL_error(L, "stack overflow (%s)", msg);
else
@ -678,7 +693,7 @@ static int skipcomment (LoadF *lf, int *cp) {
if (c == '#') { /* first line is a comment (Unix exec. file)? */
do { /* skip first line */
c = getc(lf->f);
} while (c != EOF && c != '\n') ;
} while (c != EOF && c != '\n');
*cp = getc(lf->f); /* skip end-of-line, if present */
return 1; /* there was a comment */
}

11
lua/lbaselib.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lbaselib.c,v 1.312 2015/10/29 15:21:04 roberto Exp $
** $Id: lbaselib.c,v 1.313 2016/04/11 19:18:40 roberto Exp $
** Basic library
** See Copyright Notice in lua.h
*/
@ -102,8 +102,8 @@ static int luaB_tonumber (lua_State *L) {
static int luaB_error (lua_State *L) {
int level = (int)luaL_optinteger(L, 2, 1);
lua_settop(L, 1);
if (lua_isstring(L, 1) && level > 0) { /* add extra information? */
luaL_where(L, level);
if (lua_type(L, 1) == LUA_TSTRING && level > 0) {
luaL_where(L, level); /* add extra information */
lua_pushvalue(L, 1);
lua_concat(L, 2);
}
@ -251,9 +251,8 @@ static int ipairsaux (lua_State *L) {
/*
** This function will use either 'ipairsaux' or 'ipairsaux_raw' to
** traverse a table, depending on whether the table has metamethods
** that can affect the traversal.
** 'ipairs' function. Returns 'ipairsaux', given "table", 0.
** (The given "table" may not be a table.)
*/
static int luaB_ipairs (lua_State *L) {
#if defined(LUA_COMPAT_IPAIRS)

694
lua/lcode.c
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File diff suppressed because it is too large Load Diff

5
lua/lcode.h
View File

@ -1,5 +1,5 @@
/*
** $Id: lcode.h,v 1.63 2013/12/30 20:47:58 roberto Exp $
** $Id: lcode.h,v 1.64 2016/01/05 16:22:37 roberto Exp $
** Code generator for Lua
** See Copyright Notice in lua.h
*/
@ -40,7 +40,8 @@ typedef enum BinOpr {
typedef enum UnOpr { OPR_MINUS, OPR_BNOT, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr;
#define getcode(fs,e) ((fs)->f->code[(e)->u.info])
/* get (pointer to) instruction of given 'expdesc' */
#define getinstruction(fs,e) ((fs)->f->code[(e)->u.info])
#define luaK_codeAsBx(fs,o,A,sBx) luaK_codeABx(fs,o,A,(sBx)+MAXARG_sBx)

4
lua/lcorolib.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lcorolib.c,v 1.9 2014/11/02 19:19:04 roberto Exp $
** $Id: lcorolib.c,v 1.10 2016/04/11 19:19:55 roberto Exp $
** Coroutine Library
** See Copyright Notice in lua.h
*/
@ -75,7 +75,7 @@ static int luaB_auxwrap (lua_State *L) {
lua_State *co = lua_tothread(L, lua_upvalueindex(1));
int r = auxresume(L, co, lua_gettop(L));
if (r < 0) {
if (lua_isstring(L, -1)) { /* error object is a string? */
if (lua_type(L, -1) == LUA_TSTRING) { /* error object is a string? */
luaL_where(L, 1); /* add extra info */
lua_insert(L, -2);
lua_concat(L, 2);

18
lua/ldebug.c
View File

@ -1,5 +1,5 @@
/*
** $Id: ldebug.c,v 2.117 2015/11/02 18:48:07 roberto Exp $
** $Id: ldebug.c,v 2.120 2016/03/31 19:01:21 roberto Exp $
** Debug Interface
** See Copyright Notice in lua.h
*/
@ -69,7 +69,13 @@ static void swapextra (lua_State *L) {
/*
** this function can be called asynchronous (e.g. during a signal)
** 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? */
@ -558,7 +564,7 @@ static const char *varinfo (lua_State *L, const TValue *o) {
l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
const char *t = objtypename(o);
const char *t = luaT_objtypename(L, o);
luaG_runerror(L, "attempt to %s a %s value%s", op, t, varinfo(L, o));
}
@ -590,9 +596,9 @@ l_noret luaG_tointerror (lua_State *L, const TValue *p1, const TValue *p2) {
l_noret luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
const char *t1 = objtypename(p1);
const char *t2 = objtypename(p2);
if (t1 == t2)
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);

9
lua/ldo.c
View File

@ -1,5 +1,5 @@
/*
** $Id: ldo.c,v 2.150 2015/11/19 19:16:22 roberto Exp $
** $Id: ldo.c,v 2.151 2015/12/16 16:40:07 roberto Exp $
** Stack and Call structure of Lua
** See Copyright Notice in lua.h
*/
@ -242,9 +242,14 @@ void luaD_inctop (lua_State *L) {
/* }================================================================== */
/*
** Call a hook for the given event. Make sure there is a hook to be
** called. (Both 'L->hook' and 'L->hookmask', which triggers this
** function, can be changed asynchronously by signals.)
*/
void luaD_hook (lua_State *L, int event, int line) {
lua_Hook hook = L->hook;
if (hook && L->allowhook) {
if (hook && L->allowhook) { /* make sure there is a hook */
CallInfo *ci = L->ci;
ptrdiff_t top = savestack(L, L->top);
ptrdiff_t ci_top = savestack(L, ci->top);

4
lua/ldo.h
View File

@ -1,5 +1,5 @@
/*
** $Id: ldo.h,v 2.28 2015/11/23 11:29:43 roberto Exp $
** $Id: ldo.h,v 2.29 2015/12/21 13:02:14 roberto Exp $
** Stack and Call structure of Lua
** See Copyright Notice in lua.h
*/
@ -25,7 +25,7 @@
{ pre; luaD_growstack(L, n); pos; } else { condmovestack(L,pre,pos); }
/* In general, 'pre'/'pos' are empty (nothing to save) */
#define luaD_checkstack(L,n) luaD_checkstackaux(L,n,,)
#define luaD_checkstack(L,n) luaD_checkstackaux(L,n,(void)0,(void)0)

35
lua/lgc.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lgc.c,v 2.210 2015/11/03 18:10:44 roberto Exp $
** $Id: lgc.c,v 2.212 2016/03/31 19:02:03 roberto Exp $
** Garbage Collector
** See Copyright Notice in lua.h
*/
@ -754,14 +754,11 @@ static GCObject **sweeplist (lua_State *L, GCObject **p, lu_mem count) {
/*
** sweep a list until a live object (or end of list)
*/
static GCObject **sweeptolive (lua_State *L, GCObject **p, int *n) {
static GCObject **sweeptolive (lua_State *L, GCObject **p) {
GCObject **old = p;
int i = 0;
do {
i++;
p = sweeplist(L, p, 1);
} while (p == old);
if (n) *n += i;
return p;
}
@ -856,10 +853,10 @@ static int runafewfinalizers (lua_State *L) {
/*
** call all pending finalizers
*/
static void callallpendingfinalizers (lua_State *L, int propagateerrors) {
static void callallpendingfinalizers (lua_State *L) {
global_State *g = G(L);
while (g->tobefnz)
GCTM(L, propagateerrors);
GCTM(L, 0);
}
@ -909,7 +906,7 @@ void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt) {
if (issweepphase(g)) {
makewhite(g, o); /* "sweep" object 'o' */
if (g->sweepgc == &o->next) /* should not remove 'sweepgc' object */
g->sweepgc = sweeptolive(L, g->sweepgc, NULL); /* change 'sweepgc' */
g->sweepgc = sweeptolive(L, g->sweepgc); /* change 'sweepgc' */
}
/* search for pointer pointing to 'o' */
for (p = &g->allgc; *p != o; p = &(*p)->next) { /* empty */ }
@ -951,19 +948,16 @@ static void setpause (global_State *g) {
/*
** Enter first sweep phase.
** The call to 'sweeptolive' makes pointer point to an object inside
** the list (instead of to the header), so that the real sweep do not
** need to skip objects created between "now" and the start of the real
** sweep.
** Returns how many objects it swept.
** The call to 'sweeplist' tries to make pointer point to an object
** inside the list (instead of to the header), so that the real sweep do
** not need to skip objects created between "now" and the start of the
** real sweep.
*/
static int entersweep (lua_State *L) {
static void entersweep (lua_State *L) {
global_State *g = G(L);
int n = 0;
g->gcstate = GCSswpallgc;
lua_assert(g->sweepgc == NULL);
g->sweepgc = sweeptolive(L, &g->allgc, &n);
return n;
g->sweepgc = sweeplist(L, &g->allgc, 1);
}
@ -971,7 +965,7 @@ void luaC_freeallobjects (lua_State *L) {
global_State *g = G(L);
separatetobefnz(g, 1); /* separate all objects with finalizers */
lua_assert(g->finobj == NULL);
callallpendingfinalizers(L, 0);
callallpendingfinalizers(L);
lua_assert(g->tobefnz == NULL);
g->currentwhite = WHITEBITS; /* this "white" makes all objects look dead */
g->gckind = KGC_NORMAL;
@ -1064,12 +1058,11 @@ static lu_mem singlestep (lua_State *L) {
}
case GCSatomic: {
lu_mem work;
int sw;
propagateall(g); /* make sure gray list is empty */
work = atomic(L); /* work is what was traversed by 'atomic' */
sw = entersweep(L);
entersweep(L);
g->GCestimate = gettotalbytes(g); /* first estimate */;
return work + sw * GCSWEEPCOST;
return work;
}
case GCSswpallgc: { /* sweep "regular" objects */
return sweepstep(L, g, GCSswpfinobj, &g->finobj);

4
lua/lgc.h
View File

@ -1,5 +1,5 @@
/*
** $Id: lgc.h,v 2.90 2015/10/21 18:15:15 roberto Exp $
** $Id: lgc.h,v 2.91 2015/12/21 13:02:14 roberto Exp $
** Garbage Collector
** See Copyright Notice in lua.h
*/
@ -112,7 +112,7 @@
condchangemem(L,pre,pos); }
/* more often than not, 'pre'/'pos' are empty */
#define luaC_checkGC(L) luaC_condGC(L,,)
#define luaC_checkGC(L) luaC_condGC(L,(void)0,(void)0)
#define luaC_barrier(L,p,v) ( \

19
lua/liolib.c
View File

@ -1,5 +1,5 @@
/*
** $Id: liolib.c,v 2.148 2015/11/23 11:36:11 roberto Exp $
** $Id: liolib.c,v 2.149 2016/05/02 14:03:19 roberto Exp $
** Standard I/O (and system) library
** See Copyright Notice in lua.h
*/
@ -375,14 +375,17 @@ static int io_lines (lua_State *L) {
/* maximum length of a numeral */
#define MAXRN 200
#if !defined (L_MAXLENNUM)
#define L_MAXLENNUM 200
#endif
/* auxiliary structure used by 'read_number' */
typedef struct {
FILE *f; /* file being read */
int c; /* current character (look ahead) */
int n; /* number of elements in buffer 'buff' */
char buff[MAXRN + 1]; /* +1 for ending '\0' */
char buff[L_MAXLENNUM + 1]; /* +1 for ending '\0' */
} RN;
@ -390,7 +393,7 @@ typedef struct {
** Add current char to buffer (if not out of space) and read next one
*/
static int nextc (RN *rn) {
if (rn->n >= MAXRN) { /* buffer overflow? */
if (rn->n >= L_MAXLENNUM) { /* buffer overflow? */
rn->buff[0] = '\0'; /* invalidate result */
return 0; /* fail */
}
@ -403,10 +406,10 @@ static int nextc (RN *rn) {
/*
** Accept current char if it is in 'set' (of size 1 or 2)
** Accept current char if it is in 'set' (of size 2)
*/
static int test2 (RN *rn, const char *set) {
if (rn->c == set[0] || (rn->c == set[1] && rn->c != '\0'))
if (rn->c == set[0] || rn->c == set[1])
return nextc(rn);
else return 0;
}
@ -435,11 +438,11 @@ static int read_number (lua_State *L, FILE *f) {
char decp[2];
rn.f = f; rn.n = 0;
decp[0] = lua_getlocaledecpoint(); /* get decimal point from locale */
decp[1] = '\0';
decp[1] = '.'; /* always accept a dot */
l_lockfile(rn.f);
do { rn.c = l_getc(rn.f); } while (isspace(rn.c)); /* skip spaces */
test2(&rn, "-+"); /* optional signal */
if (test2(&rn, "0")) {
if (test2(&rn, "00")) {
if (test2(&rn, "xX")) hex = 1; /* numeral is hexadecimal */
else count = 1; /* count initial '0' as a valid digit */
}

35
lua/llex.c
View File

@ -1,5 +1,5 @@
/*
** $Id: llex.c,v 2.95 2015/11/19 19:16:22 roberto Exp $
** $Id: llex.c,v 2.96 2016/05/02 14:02:12 roberto Exp $
** Lexical Analyzer
** See Copyright Notice in lua.h
*/
@ -162,7 +162,6 @@ static void inclinenumber (LexState *ls) {
void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source,
int firstchar) {
ls->t.token = 0;
ls->decpoint = '.';
ls->L = L;
ls->current = firstchar;
ls->lookahead.token = TK_EOS; /* no look-ahead token */
@ -207,35 +206,6 @@ static int check_next2 (LexState *ls, const char *set) {
}
/*
** change all characters 'from' in buffer to 'to'
*/
static void buffreplace (LexState *ls, char from, char to) {
if (from != to) {
size_t n = luaZ_bufflen(ls->buff);
char *p = luaZ_buffer(ls->buff);
while (n--)
if (p[n] == from) p[n] = to;
}
}
/*
** in case of format error, try to change decimal point separator to
** the one defined in the current locale and check again
*/
static void trydecpoint (LexState *ls, TValue *o) {
char old = ls->decpoint;
ls->decpoint = lua_getlocaledecpoint();
buffreplace(ls, old, ls->decpoint); /* try new decimal separator */
if (luaO_str2num(luaZ_buffer(ls->buff), o) == 0) {
/* format error with correct decimal point: no more options */
buffreplace(ls, ls->decpoint, '.'); /* undo change (for error message) */
lexerror(ls, "malformed number", TK_FLT);
}
}
/* LUA_NUMBER */
/*
** this function is quite liberal in what it accepts, as 'luaO_str2num'
@ -259,9 +229,8 @@ static int read_numeral (LexState *ls, SemInfo *seminfo) {
else break;
}
save(ls, '\0');
buffreplace(ls, '.', ls->decpoint); /* follow locale for decimal point */
if (luaO_str2num(luaZ_buffer(ls->buff), &obj) == 0) /* format error? */
trydecpoint(ls, &obj); /* try to update decimal point separator */
lexerror(ls, "malformed number", TK_FLT);
if (ttisinteger(&obj)) {
seminfo->i = ivalue(&obj);
return TK_INT;

3
lua/llex.h
View File

@ -1,5 +1,5 @@
/*
** $Id: llex.h,v 1.78 2014/10/29 15:38:24 roberto Exp $
** $Id: llex.h,v 1.79 2016/05/02 14:02:12 roberto Exp $
** Lexical Analyzer
** See Copyright Notice in lua.h
*/
@ -69,7 +69,6 @@ typedef struct LexState {
struct Dyndata *dyd; /* dynamic structures used by the parser */
TString *source; /* current source name */
TString *envn; /* environment variable name */
char decpoint; /* locale decimal point */
} LexState;

88
lua/lobject.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lobject.c,v 2.108 2015/11/02 16:09:30 roberto Exp $
** $Id: lobject.c,v 2.111 2016/05/20 14:07:48 roberto Exp $
** Some generic functions over Lua objects
** See Copyright Notice in lua.h
*/
@ -243,20 +243,59 @@ static lua_Number lua_strx2number (const char *s, char **endptr) {
/* }====================================================== */
static const char *l_str2d (const char *s, lua_Number *result) {
/* maximum length of a numeral */
#if !defined (L_MAXLENNUM)
#define L_MAXLENNUM 200
#endif
static const char *l_str2dloc (const char *s, lua_Number *result, int mode) {
char *endptr;
if (strpbrk(s, "nN")) /* reject 'inf' and 'nan' */
return NULL;
else if (strpbrk(s, "xX")) /* hex? */
*result = lua_strx2number(s, &endptr);
else
*result = lua_str2number(s, &endptr);
if (endptr == s) return NULL; /* nothing recognized */
while (lisspace(cast_uchar(*endptr))) endptr++;
return (*endptr == '\0' ? endptr : NULL); /* OK if no trailing characters */
*result = (mode == 'x') ? lua_strx2number(s, &endptr) /* try to convert */
: lua_str2number(s, &endptr);
if (endptr == s) return NULL; /* nothing recognized? */
while (lisspace(cast_uchar(*endptr))) endptr++; /* skip trailing spaces */
return (*endptr == '\0') ? endptr : NULL; /* OK if no trailing characters */
}
/*
** Convert string 's' to a Lua number (put in 'result'). Return NULL
** on fail or the address of the ending '\0' on success.
** 'pmode' points to (and 'mode' contains) special things in the string:
** - 'x'/'X' means an hexadecimal numeral
** - 'n'/'N' means 'inf' or 'nan' (which should be rejected)
** - '.' just optimizes the search for the common case (nothing special)
** This function accepts both the current locale or a dot as the radix
** mark. If the convertion fails, it may mean number has a dot but
** locale accepts something else. In that case, the code copies 's'
** to a buffer (because 's' is read-only), changes the dot to the
** current locale radix mark, and tries to convert again.
*/
static const char *l_str2d (const char *s, lua_Number *result) {
const char *endptr;
const char *pmode = strpbrk(s, ".xXnN");
int mode = pmode ? ltolower(cast_uchar(*pmode)) : 0;
if (mode == 'n') /* reject 'inf' and 'nan' */
return NULL;
endptr = l_str2dloc(s, result, mode); /* try to convert */
if (endptr == NULL) { /* failed? may be a different locale */
char buff[L_MAXLENNUM + 1];
char *pdot = strchr(s, '.');
if (strlen(s) > L_MAXLENNUM || pdot == NULL)
return NULL; /* string too long or no dot; fail */
strcpy(buff, s); /* copy string to buffer */
buff[pdot - s] = lua_getlocaledecpoint(); /* correct decimal point */
endptr = l_str2dloc(buff, result, mode); /* try again */
if (endptr != NULL)
endptr = s + (endptr - buff); /* make relative to 's' */
}
return endptr;
}
#define MAXBY10 cast(lua_Unsigned, LUA_MAXINTEGER / 10)
#define MAXLASTD cast_int(LUA_MAXINTEGER % 10)
static const char *l_str2int (const char *s, lua_Integer *result) {
lua_Unsigned a = 0;
int empty = 1;
@ -273,7 +312,10 @@ static const char *l_str2int (const char *s, lua_Integer *result) {
}
else { /* decimal */
for (; lisdigit(cast_uchar(*s)); s++) {
a = a * 10 + *s - '0';
int d = *s - '0';
if (a >= MAXBY10 && (a > MAXBY10 || d > MAXLASTD + neg)) /* overflow? */
return NULL; /* do not accept it (as integer) */
a = a * 10 + d;
empty = 0;
}
}
@ -351,8 +393,10 @@ static void pushstr (lua_State *L, const char *str, size_t l) {
}
/* this function handles only '%d', '%c', '%f', '%p', and '%s'
conventional formats, plus Lua-specific '%I' and '%U' */
/*
** this function handles only '%d', '%c', '%f', '%p', and '%s'
conventional formats, plus Lua-specific '%I' and '%U'
*/
const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
int n = 0;
for (;;) {
@ -360,13 +404,13 @@ const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
if (e == NULL) break;
pushstr(L, fmt, e - fmt);
switch (*(e+1)) {
case 's': {
case 's': { /* zero-terminated string */
const char *s = va_arg(argp, char *);
if (s == NULL) s = "(null)";
pushstr(L, s, strlen(s));
break;
}
case 'c': {
case 'c': { /* an 'int' as a character */
char buff = cast(char, va_arg(argp, int));
if (lisprint(cast_uchar(buff)))
pushstr(L, &buff, 1);
@ -374,28 +418,28 @@ const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
luaO_pushfstring(L, "<\\%d>", cast_uchar(buff));
break;
}
case 'd': {
case 'd': { /* an 'int' */
setivalue(L->top, va_arg(argp, int));
goto top2str;
}
case 'I': {
case 'I': { /* a 'lua_Integer' */
setivalue(L->top, cast(lua_Integer, va_arg(argp, l_uacInt)));
goto top2str;
}
case 'f': {
case 'f': { /* a 'lua_Number' */
setfltvalue(L->top, cast_num(va_arg(argp, l_uacNumber)));
top2str:
top2str: /* convert the top element to a string */
luaD_inctop(L);
luaO_tostring(L, L->top - 1);
break;
}
case 'p': {
case 'p': { /* a pointer */
char buff[4*sizeof(void *) + 8]; /* should be enough space for a '%p' */
int l = l_sprintf(buff, sizeof(buff), "%p", va_arg(argp, void *));
pushstr(L, buff, l);
break;
}
case 'U': {
case 'U': { /* an 'int' as a UTF-8 sequence */
char buff[UTF8BUFFSZ];
int l = luaO_utf8esc(buff, cast(long, va_arg(argp, long)));
pushstr(L, buff + UTF8BUFFSZ - l, l);

91
lua/loslib.c
View File

@ -1,5 +1,5 @@
/*
** $Id: loslib.c,v 1.60 2015/11/19 19:16:22 roberto Exp $
** $Id: loslib.c,v 1.64 2016/04/18 13:06:55 roberto Exp $
** Standard Operating System library
** See Copyright Notice in lua.h
*/
@ -24,18 +24,29 @@
/*
** {==================================================================
** list of valid conversion specifiers for the 'strftime' function
** List of valid conversion specifiers for the 'strftime' function;
** options are grouped by length; group of length 2 start with '||'.
** ===================================================================
*/
#if !defined(LUA_STRFTIMEOPTIONS) /* { */
#if defined(LUA_USE_C89)
#define LUA_STRFTIMEOPTIONS { "aAbBcdHIjmMpSUwWxXyYz%", "" }
/* options for ANSI C 89 */
#define L_STRFTIMEC89 "aAbBcdHIjmMpSUwWxXyYZ%"
/* options for ISO C 99 and POSIX */
#define L_STRFTIMEC99 "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%" \
"||" "EcECExEXEyEY" "OdOeOHOIOmOMOSOuOUOVOwOWOy"
/* options for Windows */
#define L_STRFTIMEWIN "aAbBcdHIjmMpSUwWxXyYzZ%" \
"||" "#c#x#d#H#I#j#m#M#S#U#w#W#y#Y"
#if defined(LUA_USE_WINDOWS)
#define LUA_STRFTIMEOPTIONS L_STRFTIMEWIN
#elif defined(LUA_USE_C89)
#define LUA_STRFTIMEOPTIONS L_STRFTIMEC89
#else /* C99 specification */
#define LUA_STRFTIMEOPTIONS \
{ "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%", "", \
"E", "cCxXyY", \
"O", "deHImMSuUVwWy" }
#define LUA_STRFTIMEOPTIONS L_STRFTIMEC99
#endif
#endif /* } */
@ -195,6 +206,23 @@ static void setboolfield (lua_State *L, const char *key, int value) {
lua_setfield(L, -2, key);
}
/*
** Set all fields from structure 'tm' in the table on top of the stack
*/
static void setallfields (lua_State *L, struct tm *stm) {
setfield(L, "sec", stm->tm_sec);
setfield(L, "min", stm->tm_min);
setfield(L, "hour", stm->tm_hour);
setfield(L, "day", stm->tm_mday);
setfield(L, "month", stm->tm_mon + 1);
setfield(L, "year", stm->tm_year + 1900);
setfield(L, "wday", stm->tm_wday + 1);
setfield(L, "yday", stm->tm_yday + 1);
setboolfield(L, "isdst", stm->tm_isdst);
}
static int getboolfield (lua_State *L, const char *key) {
int res;
res = (lua_getfield(L, -1, key) == LUA_TNIL) ? -1 : lua_toboolean(L, -1);
@ -210,18 +238,18 @@ static int getboolfield (lua_State *L, const char *key) {
static int getfield (lua_State *L, const char *key, int d, int delta) {
int isnum;
int t = lua_getfield(L, -1, key);
int t = lua_getfield(L, -1, key); /* get field and its type */
lua_Integer res = lua_tointegerx(L, -1, &isnum);
if (!isnum) { /* field is not a number? */
if (!isnum) { /* field is not an integer? */
if (t != LUA_TNIL) /* some other value? */
return luaL_error(L, "field '%s' not an integer", key);
return luaL_error(L, "field '%s' is not an integer", key);
else if (d < 0) /* absent field; no default? */
return luaL_error(L, "field '%s' missing in date table", key);
res = d;
}
else {
if (!(-L_MAXDATEFIELD <= res && res <= L_MAXDATEFIELD))
return luaL_error(L, "field '%s' out-of-bounds", key);
return luaL_error(L, "field '%s' is out-of-bound", key);
res -= delta;
}
lua_pop(L, 1);
@ -230,21 +258,15 @@ static int getfield (lua_State *L, const char *key, int d, int delta) {
static const char *checkoption (lua_State *L, const char *conv, char *buff) {
static const char *const options[] = LUA_STRFTIMEOPTIONS;
unsigned int i;
for (i = 0; i < sizeof(options)/sizeof(options[0]); i += 2) {
if (*conv != '\0' && strchr(options[i], *conv) != NULL) {
buff[1] = *conv;
if (*options[i + 1] == '\0') { /* one-char conversion specifier? */
buff[2] = '\0'; /* end buffer */
return conv + 1;
}
else if (*(conv + 1) != '\0' &&
strchr(options[i + 1], *(conv + 1)) != NULL) {
buff[2] = *(conv + 1); /* valid two-char conversion specifier */
buff[3] = '\0'; /* end buffer */
return conv + 2;
}
const char *option;
int oplen = 1;
for (option = LUA_STRFTIMEOPTIONS; *option != '\0'; option += oplen) {
if (*option == '|') /* next block? */
oplen++; /* next length */
else if (memcmp(conv, option, oplen) == 0) { /* match? */
memcpy(buff, conv, oplen); /* copy valid option to buffer */
buff[oplen] = '\0';
return conv + oplen; /* return next item */
}
}
luaL_argerror(L, 1,
@ -271,18 +293,10 @@ static int os_date (lua_State *L) {
luaL_error(L, "time result cannot be represented in this installation");
if (strcmp(s, "*t") == 0) {
lua_createtable(L, 0, 9); /* 9 = number of fields */
setfield(L, "sec", stm->tm_sec);
setfield(L, "min", stm->tm_min);
setfield(L, "hour", stm->tm_hour);
setfield(L, "day", stm->tm_mday);
setfield(L, "month", stm->tm_mon+1);
setfield(L, "year", stm->tm_year+1900);
setfield(L, "wday", stm->tm_wday+1);
setfield(L, "yday", stm->tm_yday+1);
setboolfield(L, "isdst", stm->tm_isdst);
setallfields(L, stm);
}
else {
char cc[4];
char cc[4]; /* buffer for individual conversion specifiers */
luaL_Buffer b;
cc[0] = '%';
luaL_buffinit(L, &b);
@ -292,7 +306,7 @@ static int os_date (lua_State *L) {
else {
size_t reslen;
char *buff = luaL_prepbuffsize(&b, SIZETIMEFMT);
s = checkoption(L, s + 1, cc);
s = checkoption(L, s + 1, cc + 1); /* copy specifier to 'cc' */
reslen = strftime(buff, SIZETIMEFMT, cc, stm);
luaL_addsize(&b, reslen);
}
@ -319,6 +333,7 @@ static int os_time (lua_State *L) {
ts.tm_year = getfield(L, "year", -1, 1900);
ts.tm_isdst = getboolfield(L, "isdst");
t = mktime(&ts);
setallfields(L, &ts); /* update fields with normalized values */
}
if (t != (time_t)(l_timet)t || t == (time_t)(-1))
luaL_error(L, "time result cannot be represented in this installation");

40
lua/lparser.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lparser.c,v 2.149 2015/11/02 16:09:30 roberto Exp $
** $Id: lparser.c,v 2.153 2016/05/13 19:10:16 roberto Exp $
** Lua Parser
** See Copyright Notice in lua.h
*/
@ -164,7 +164,8 @@ static int registerlocalvar (LexState *ls, TString *varname) {
int oldsize = f->sizelocvars;
luaM_growvector(ls->L, f->locvars, fs->nlocvars, f->sizelocvars,
LocVar, SHRT_MAX, "local variables");
while (oldsize < f->sizelocvars) f->locvars[oldsize++].varname = NULL;
while (oldsize < f->sizelocvars)
f->locvars[oldsize++].varname = NULL;
f->locvars[fs->nlocvars].varname = varname;
luaC_objbarrier(ls->L, f, varname);
return fs->nlocvars++;
@ -230,7 +231,8 @@ static int newupvalue (FuncState *fs, TString *name, expdesc *v) {
checklimit(fs, fs->nups + 1, MAXUPVAL, "upvalues");
luaM_growvector(fs->ls->L, f->upvalues, fs->nups, f->sizeupvalues,
Upvaldesc, MAXUPVAL, "upvalues");
while (oldsize < f->sizeupvalues) f->upvalues[oldsize++].name = NULL;
while (oldsize < f->sizeupvalues)
f->upvalues[oldsize++].name = NULL;
f->upvalues[fs->nups].instack = (v->k == VLOCAL);
f->upvalues[fs->nups].idx = cast_byte(v->u.info);
f->upvalues[fs->nups].name = name;
@ -255,7 +257,8 @@ static int searchvar (FuncState *fs, TString *n) {
*/
static void markupval (FuncState *fs, int level) {
BlockCnt *bl = fs->bl;
while (bl->nactvar > level) bl = bl->previous;
while (bl->nactvar > level)
bl = bl->previous;
bl->upval = 1;
}
@ -264,27 +267,26 @@ static void markupval (FuncState *fs, int level) {
Find variable with given name 'n'. If it is an upvalue, add this
upvalue into all intermediate functions.
*/
static int singlevaraux (FuncState *fs, TString *n, expdesc *var, int base) {
static void singlevaraux (FuncState *fs, TString *n, expdesc *var, int base) {
if (fs == NULL) /* no more levels? */
return VVOID; /* default is global */
init_exp(var, VVOID, 0); /* default is global */
else {
int v = searchvar(fs, n); /* look up locals at current level */
if (v >= 0) { /* found? */
init_exp(var, VLOCAL, v); /* variable is local */
if (!base)
markupval(fs, v); /* local will be used as an upval */
return VLOCAL;
}
else { /* not found as local at current level; try upvalues */
int idx = searchupvalue(fs, n); /* try existing upvalues */
if (idx < 0) { /* not found? */
if (singlevaraux(fs->prev, n, var, 0) == VVOID) /* try upper levels */
return VVOID; /* not found; is a global */
singlevaraux(fs->prev, n, var, 0); /* try upper levels */
if (var->k == VVOID) /* not found? */
return; /* it is a global */
/* else was LOCAL or UPVAL */
idx = newupvalue(fs, n, var); /* will be a new upvalue */
}
init_exp(var, VUPVAL, idx);
return VUPVAL;
init_exp(var, VUPVAL, idx); /* new or old upvalue */
}
}
}
@ -293,10 +295,11 @@ static int singlevaraux (FuncState *fs, TString *n, expdesc *var, int base) {
static void singlevar (LexState *ls, expdesc *var) {
TString *varname = str_checkname(ls);
FuncState *fs = ls->fs;
if (singlevaraux(fs, varname, var, 1) == VVOID) { /* global name? */
singlevaraux(fs, varname, var, 1);
if (var->k == VVOID) { /* global name? */
expdesc key;
singlevaraux(fs, ls->envn, var, 1); /* get environment variable */
lua_assert(var->k == VLOCAL || var->k == VUPVAL);
lua_assert(var->k != VVOID); /* this one must exist */
codestring(ls, &key, varname); /* key is variable name */
luaK_indexed(fs, var, &key); /* env[varname] */
}
@ -499,7 +502,8 @@ static Proto *addprototype (LexState *ls) {
if (fs->np >= f->sizep) {
int oldsize = f->sizep;
luaM_growvector(L, f->p, fs->np, f->sizep, Proto *, MAXARG_Bx, "functions");
while (oldsize < f->sizep) f->p[oldsize++] = NULL;
while (oldsize < f->sizep)
f->p[oldsize++] = NULL;
}
f->p[fs->np++] = clp = luaF_newproto(L);
luaC_objbarrier(L, f, clp);
@ -1226,7 +1230,7 @@ static void labelstat (LexState *ls, TString *label, int line) {
checkrepeated(fs, ll, label); /* check for repeated labels */
checknext(ls, TK_DBCOLON); /* skip double colon */
/* create new entry for this label */
l = newlabelentry(ls, ll, label, line, fs->pc);
l = newlabelentry(ls, ll, label, line, luaK_getlabel(fs));
skipnoopstat(ls); /* skip other no-op statements */
if (block_follow(ls, 0)) { /* label is last no-op statement in the block? */
/* assume that locals are already out of scope */
@ -1494,7 +1498,7 @@ static void exprstat (LexState *ls) {
}
else { /* stat -> func */
check_condition(ls, v.v.k == VCALL, "syntax error");
SETARG_C(getcode(fs, &v.v), 1); /* call statement uses no results */
SETARG_C(getinstruction(fs, &v.v), 1); /* call statement uses no results */
}
}
@ -1511,8 +1515,8 @@ static void retstat (LexState *ls) {
if (hasmultret(e.k)) {
luaK_setmultret(fs, &e);
if (e.k == VCALL && nret == 1) { /* tail call? */
SET_OPCODE(getcode(fs,&e), OP_TAILCALL);
lua_assert(GETARG_A(getcode(fs,&e)) == fs->nactvar);
SET_OPCODE(getinstruction(fs,&e), OP_TAILCALL);
lua_assert(GETARG_A(getinstruction(fs,&e)) == fs->nactvar);
}
first = fs->nactvar;
nret = LUA_MULTRET; /* return all values */

53
lua/lparser.h
View File

@ -1,5 +1,5 @@
/*
** $Id: lparser.h,v 1.74 2014/10/25 11:50:46 roberto Exp $
** $Id: lparser.h,v 1.76 2015/12/30 18:16:13 roberto Exp $
** Lua Parser
** See Copyright Notice in lua.h
*/
@ -13,25 +13,38 @@
/*
** Expression descriptor
** Expression and variable descriptor.
** Code generation for variables and expressions can be delayed to allow
** optimizations; An 'expdesc' structure describes a potentially-delayed
** variable/expression. It has a description of its "main" value plus a
** list of conditional jumps that can also produce its value (generated
** by short-circuit operators 'and'/'or').
*/
/* kinds of variables/expressions */
typedef enum {
VVOID, /* no value */
VNIL,
VTRUE,
VFALSE,
VK, /* info = index of constant in 'k' */
VKFLT, /* nval = numerical float value */
VKINT, /* nval = numerical integer value */
VNONRELOC, /* info = result register */
VLOCAL, /* info = local register */
VUPVAL, /* info = index of upvalue in 'upvalues' */
VINDEXED, /* t = table register/upvalue; idx = index R/K */
VJMP, /* info = instruction pc */
VRELOCABLE, /* info = instruction pc */
VCALL, /* info = instruction pc */
VVARARG /* info = instruction pc */
VVOID, /* when 'expdesc' describes the last expression a list,
this kind means an empty list (so, no expression) */
VNIL, /* constant nil */
VTRUE, /* constant true */
VFALSE, /* constant false */
VK, /* constant in 'k'; info = index of constant in 'k' */
VKFLT, /* floating constant; nval = numerical float value */
VKINT, /* integer constant; nval = numerical integer value */
VNONRELOC, /* expression has its value in a fixed register;
info = result register */
VLOCAL, /* local variable; info = local register */
VUPVAL, /* upvalue variable; info = index of upvalue in 'upvalues' */
VINDEXED, /* indexed variable;
ind.vt = whether 't' is register or upvalue;
ind.t = table register or upvalue;
ind.idx = key's R/K index */
VJMP, /* expression is a test/comparison;
info = pc of corresponding jump instruction */
VRELOCABLE, /* expression can put result in any register;
info = instruction pc */
VCALL, /* expression is a function call; info = instruction pc */
VVARARG /* vararg expression; info = instruction pc */
} expkind;
@ -41,14 +54,14 @@ typedef enum {
typedef struct expdesc {
expkind k;
union {
lua_Integer ival; /* for VKINT */
lua_Number nval; /* for VKFLT */
int info; /* for generic use */
struct { /* for indexed variables (VINDEXED) */
short idx; /* index (R/K) */
lu_byte t; /* table (register or upvalue) */
lu_byte vt; /* whether 't' is register (VLOCAL) or upvalue (VUPVAL) */
} ind;
int info; /* for generic use */
lua_Number nval; /* for VKFLT */
lua_Integer ival; /* for VKINT */
} u;
int t; /* patch list of 'exit when true' */
int f; /* patch list of 'exit when false' */

15
lua/lstate.h
View File

@ -1,5 +1,5 @@
/*
** $Id: lstate.h,v 2.128 2015/11/13 12:16:51 roberto Exp $
** $Id: lstate.h,v 2.130 2015/12/16 16:39:38 roberto Exp $
** Global State
** See Copyright Notice in lua.h
*/
@ -33,6 +33,15 @@
struct lua_longjmp; /* defined in ldo.c */
/*
** Atomic type (relative to signals) to better ensure that 'lua_sethook'
** is thread safe
*/
#if !defined(l_signalT)
#include <signal.h>
#define l_signalT sig_atomic_t
#endif
/* extra stack space to handle TM calls and some other extras */
#define EXTRA_STACK 5
@ -162,14 +171,14 @@ struct lua_State {
struct lua_State *twups; /* list of threads with open upvalues */
struct lua_longjmp *errorJmp; /* current error recover point */
CallInfo base_ci; /* CallInfo for first level (C calling Lua) */
lua_Hook hook;
volatile lua_Hook hook;
ptrdiff_t errfunc; /* current error handling function (stack index) */
int stacksize;
int basehookcount;
int hookcount;
unsigned short nny; /* number of non-yieldable calls in stack */
unsigned short nCcalls; /* number of nested C calls */
lu_byte hookmask;
l_signalT hookmask;
lu_byte allowhook;
};

143
lua/lstrlib.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lstrlib.c,v 1.239 2015/11/25 16:28:17 roberto Exp $
** $Id: lstrlib.c,v 1.251 2016/05/20 14:13:21 roberto Exp $
** Standard library for string operations and pattern-matching
** See Copyright Notice in lua.h
*/
@ -13,6 +13,7 @@
#include <ctype.h>
#include <float.h>
#include <limits.h>
#include <locale.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
@ -26,7 +27,8 @@
/*
** maximum number of captures that a pattern can do during
** pattern-matching. This limit is arbitrary.
** pattern-matching. This limit is arbitrary, but must fit in
** an unsigned char.
*/
#if !defined(LUA_MAXCAPTURES)
#define LUA_MAXCAPTURES 32
@ -214,9 +216,8 @@ typedef struct MatchState {
const char *src_end; /* end ('\0') of source string */
const char *p_end; /* end ('\0') of pattern */
lua_State *L;
size_t nrep; /* limit to avoid non-linear complexity */
int matchdepth; /* control for recursive depth (to avoid C stack overflow) */
int level; /* total number of captures (finished or unfinished) */
unsigned char level; /* total number of captures (finished or unfinished) */
struct {
const char *init;
ptrdiff_t len;
@ -234,17 +235,6 @@ static const char *match (MatchState *ms, const char *s, const char *p);
#endif
/*
** parameters to control the maximum number of operators handled in
** a match (to avoid non-linear complexity). The maximum will be:
** (subject length) * A_REPS + B_REPS
*/
#if !defined(A_REPS)
#define A_REPS 4
#define B_REPS 100000
#endif
#define L_ESC '%'
#define SPECIALS "^$*+?.([%-"
@ -502,8 +492,6 @@ static const char *match (MatchState *ms, const char *s, const char *p) {
s = NULL; /* fail */
}
else { /* matched once */
if (ms->nrep-- == 0)
luaL_error(ms->L, "pattern too complex");
switch (*ep) { /* handle optional suffix */
case '?': { /* optional */
const char *res;
@ -607,10 +595,6 @@ static void prepstate (MatchState *ms, lua_State *L,
ms->src_init = s;
ms->src_end = s + ls;
ms->p_end = p + lp;
if (ls < (MAX_SIZET - B_REPS) / A_REPS)
ms->nrep = A_REPS * ls + B_REPS;
else /* overflow (very long subject) */
ms->nrep = MAX_SIZET; /* no limit */
}
@ -681,6 +665,7 @@ static int str_match (lua_State *L) {
typedef struct GMatchState {
const char *src; /* current position */
const char *p; /* pattern */
const char *lastmatch; /* end of last match */
MatchState ms; /* match state */
} GMatchState;
@ -688,14 +673,12 @@ typedef struct GMatchState {
static int gmatch_aux (lua_State *L) {
GMatchState *gm = (GMatchState *)lua_touserdata(L, lua_upvalueindex(3));
const char *src;
gm->ms.L = L;
for (src = gm->src; src <= gm->ms.src_end; src++) {
const char *e;
reprepstate(&gm->ms);
if ((e = match(&gm->ms, src, gm->p)) != NULL) {
if (e == src) /* empty match? */
gm->src =src + 1; /* go at least one position */
else
gm->src = e;
if ((e = match(&gm->ms, src, gm->p)) != NULL && e != gm->lastmatch) {
gm->src = gm->lastmatch = e;
return push_captures(&gm->ms, src, e);
}
}
@ -711,7 +694,7 @@ static int gmatch (lua_State *L) {
lua_settop(L, 2); /* keep them on closure to avoid being collected */
gm = (GMatchState *)lua_newuserdata(L, sizeof(GMatchState));
prepstate(&gm->ms, L, s, ls, p, lp);
gm->src = s; gm->p = p;
gm->src = s; gm->p = p; gm->lastmatch = NULL;
lua_pushcclosure(L, gmatch_aux, 3);
return 1;
}
@ -778,12 +761,13 @@ static void add_value (MatchState *ms, luaL_Buffer *b, const char *s,
static int str_gsub (lua_State *L) {
size_t srcl, lp;
const char *src = luaL_checklstring(L, 1, &srcl);
const char *p = luaL_checklstring(L, 2, &lp);
int tr = lua_type(L, 3);
lua_Integer max_s = luaL_optinteger(L, 4, srcl + 1);
const char *src = luaL_checklstring(L, 1, &srcl); /* subject */
const char *p = luaL_checklstring(L, 2, &lp); /* pattern */
const char *lastmatch = NULL; /* end of last match */
int tr = lua_type(L, 3); /* replacement type */
lua_Integer max_s = luaL_optinteger(L, 4, srcl + 1); /* max replacements */
int anchor = (*p == '^');
lua_Integer n = 0;
lua_Integer n = 0; /* replacement count */
MatchState ms;
luaL_Buffer b;
luaL_argcheck(L, tr == LUA_TNUMBER || tr == LUA_TSTRING ||
@ -796,16 +780,15 @@ static int str_gsub (lua_State *L) {
prepstate(&ms, L, src, srcl, p, lp);
while (n < max_s) {
const char *e;
reprepstate(&ms);
if ((e = match(&ms, src, p)) != NULL) {
reprepstate(&ms); /* (re)prepare state for new match */
if ((e = match(&ms, src, p)) != NULL && e != lastmatch) { /* match? */
n++;
add_value(&ms, &b, src, e, tr);
add_value(&ms, &b, src, e, tr); /* add replacement to buffer */
src = lastmatch = e;
}
if (e && e>src) /* non empty match? */
src = e; /* skip it */
else if (src < ms.src_end)
else if (src < ms.src_end) /* otherwise, skip one character */
luaL_addchar(&b, *src++);
else break;
else break; /* end of subject */
if (anchor) break;
}
luaL_addlstring(&b, src, ms.src_end-src);
@ -830,7 +813,6 @@ static int str_gsub (lua_State *L) {
** Hexadecimal floating-point formatter
*/
#include <locale.h>
#include <math.h>
#define SIZELENMOD (sizeof(LUA_NUMBER_FRMLEN)/sizeof(char))
@ -922,16 +904,14 @@ static int lua_number2strx (lua_State *L, char *buff, int sz,
#define MAX_FORMAT 32
static void addquoted (lua_State *L, luaL_Buffer *b, int arg) {
size_t l;
const char *s = luaL_checklstring(L, arg, &l);
static void addquoted (luaL_Buffer *b, const char *s, size_t len) {
luaL_addchar(b, '"');
while (l--) {
while (len--) {
if (*s == '"' || *s == '\\' || *s == '\n') {
luaL_addchar(b, '\\');
luaL_addchar(b, *s);
}
else if (*s == '\0' || iscntrl(uchar(*s))) {
else if (iscntrl(uchar(*s))) {
char buff[10];
if (!isdigit(uchar(*(s+1))))
l_sprintf(buff, sizeof(buff), "\\%d", (int)uchar(*s));
@ -946,6 +926,57 @@ static void addquoted (lua_State *L, luaL_Buffer *b, int arg) {
luaL_addchar(b, '"');
}
/*
** Ensures the 'buff' string uses a dot as the radix character.
*/
static void checkdp (char *buff, int nb) {
if (memchr(buff, '.', nb) == NULL) { /* no dot? */
char point = lua_getlocaledecpoint(); /* try locale point */
char *ppoint = memchr(buff, point, nb);
if (ppoint) *ppoint = '.'; /* change it to a dot */
}
}
static void addliteral (lua_State *L, luaL_Buffer *b, int arg) {
switch (lua_type(L, arg)) {
case LUA_TSTRING: {
size_t len;
const char *s = lua_tolstring(L, arg, &len);
addquoted(b, s, len);
break;
}
case LUA_TNUMBER: {
char *buff = luaL_prepbuffsize(b, MAX_ITEM);
int nb;
if (!lua_isinteger(L, arg)) { /* float? */
lua_Number n = lua_tonumber(L, arg); /* write as hexa ('%a') */
nb = lua_number2strx(L, buff, MAX_ITEM, "%" LUA_NUMBER_FRMLEN "a", n);
checkdp(buff, nb); /* ensure it uses a dot */
}
else { /* integers */
lua_Integer n = lua_tointeger(L, arg);
const char *format = (n == LUA_MININTEGER) /* corner case? */
? "0x%" LUA_INTEGER_FRMLEN "x" /* use hexa */
: LUA_INTEGER_FMT; /* else use default format */
nb = l_sprintf(buff, MAX_ITEM, format, n);
}
luaL_addsize(b, nb);
break;
}
case LUA_TNIL: case LUA_TBOOLEAN: {
luaL_tolstring(L, arg, NULL);
luaL_addvalue(b);
break;
}
default: {
luaL_argerror(L, arg, "value has no literal form");
}
}
}
static const char *scanformat (lua_State *L, const char *strfrmt, char *form) {
const char *p = strfrmt;
while (*p != '\0' && strchr(FLAGS, *p) != NULL) p++; /* skip flags */
@ -1025,7 +1056,7 @@ static int str_format (lua_State *L) {
break;
}
case 'q': {
addquoted(L, &b, arg);
addliteral(L, &b, arg);
break;
}
case 's': {
@ -1070,8 +1101,8 @@ static int str_format (lua_State *L) {
/* value used for padding */
#if !defined(LUA_PACKPADBYTE)
#define LUA_PACKPADBYTE 0x00
#if !defined(LUAL_PACKPADBYTE)
#define LUAL_PACKPADBYTE 0x00
#endif
/* maximum size for the binary representation of an integer */
@ -1308,7 +1339,7 @@ static int str_pack (lua_State *L) {
KOption opt = getdetails(&h, totalsize, &fmt, &size, &ntoalign);
totalsize += ntoalign + size;
while (ntoalign-- > 0)
luaL_addchar(&b, LUA_PACKPADBYTE); /* fill alignment */
luaL_addchar(&b, LUAL_PACKPADBYTE); /* fill alignment */
arg++;
switch (opt) {
case Kint: { /* signed integers */
@ -1343,13 +1374,11 @@ static int str_pack (lua_State *L) {
case Kchar: { /* fixed-size string */
size_t len;
const char *s = luaL_checklstring(L, arg, &len);
if ((size_t)size <= len) /* string larger than (or equal to) needed? */
luaL_addlstring(&b, s, size); /* truncate string to asked size */
else { /* string smaller than needed */
luaL_addlstring(&b, s, len); /* add it all */
while (len++ < (size_t)size) /* pad extra space */
luaL_addchar(&b, LUA_PACKPADBYTE);
}
luaL_argcheck(L, len <= (size_t)size, arg,
"string longer than given size");
luaL_addlstring(&b, s, len); /* add string */
while (len++ < (size_t)size) /* pad extra space */
luaL_addchar(&b, LUAL_PACKPADBYTE);
break;
}
case Kstring: { /* strings with length count */
@ -1372,7 +1401,7 @@ static int str_pack (lua_State *L) {
totalsize += len + 1;
break;
}
case Kpadding: luaL_addchar(&b, LUA_PACKPADBYTE); /* FALLTHROUGH */
case Kpadding: luaL_addchar(&b, LUAL_PACKPADBYTE); /* FALLTHROUGH */
case Kpaddalign: case Knop:
arg--; /* undo increment */
break;

41
lua/ltablib.c
View File

@ -1,5 +1,5 @@
/*
** $Id: ltablib.c,v 1.90 2015/11/25 12:48:57 roberto Exp $
** $Id: ltablib.c,v 1.93 2016/02/25 19:41:54 roberto Exp $
** Library for Table Manipulation
** See Copyright Notice in lua.h
*/
@ -53,7 +53,7 @@ static void checktab (lua_State *L, int arg, int what) {
lua_pop(L, n); /* pop metatable and tested metamethods */
}
else
luaL_argerror(L, arg, "table expected"); /* force an error */
luaL_checktype(L, arg, LUA_TTABLE); /* force an error */
}
}
@ -139,7 +139,7 @@ static int tmove (lua_State *L) {
n = e - f + 1; /* number of elements to move */
luaL_argcheck(L, t <= LUA_MAXINTEGER - n + 1, 4,
"destination wrap around");
if (t > e || t <= f || tt != 1) {
if (t > e || t <= f || (tt != 1 && !lua_compare(L, 1, tt, LUA_OPEQ))) {
for (i = 0; i < n; i++) {
lua_geti(L, 1, f + i);
lua_seti(L, tt, t + i);
@ -152,7 +152,7 @@ static int tmove (lua_State *L) {
}
}
}
lua_pushvalue(L, tt); /* return "to table" */
lua_pushvalue(L, tt); /* return destination table */
return 1;
}
@ -172,7 +172,7 @@ static int tconcat (lua_State *L) {
size_t lsep;
const char *sep = luaL_optlstring(L, 2, "", &lsep);
lua_Integer i = luaL_optinteger(L, 3, 1);
last = luaL_opt(L, luaL_checkinteger, 4, last);
last = luaL_optinteger(L, 4, last);
luaL_buffinit(L, &b);
for (; i < last; i++) {
addfield(L, &b, i);
@ -232,6 +232,10 @@ static int unpack (lua_State *L) {
*/
/* type for array indices */
typedef unsigned int IdxT;
/*
** Produce a "random" 'unsigned int' to randomize pivot choice. This
** macro is used only when 'sort' detects a big imbalance in the result
@ -270,7 +274,7 @@ static unsigned int l_randomizePivot (void) {
#define RANLIMIT 100u
static void set2 (lua_State *L, unsigned int i, unsigned int j) {
static void set2 (lua_State *L, IdxT i, IdxT j) {
lua_seti(L, 1, i);
lua_seti(L, 1, j);
}
@ -303,10 +307,9 @@ static int sort_comp (lua_State *L, int a, int b) {
** Pos-condition: a[lo .. i - 1] <= a[i] == P <= a[i + 1 .. up]
** returns 'i'.
*/
static unsigned int partition (lua_State *L, unsigned int lo,
unsigned int up) {
unsigned int i = lo; /* will be incremented before first use */
unsigned int j = up - 1; /* will be decremented before first use */
static IdxT partition (lua_State *L, IdxT lo, IdxT up) {
IdxT i = lo; /* will be incremented before first use */
IdxT j = up - 1; /* will be decremented before first use */
/* loop invariant: a[lo .. i] <= P <= a[j .. up] */
for (;;) {
/* next loop: repeat ++i while a[i] < P */
@ -340,10 +343,9 @@ static unsigned int partition (lua_State *L, unsigned int lo,
** Choose an element in the middle (2nd-3th quarters) of [lo,up]
** "randomized" by 'rnd'
*/
static unsigned int choosePivot (unsigned int lo, unsigned int up,
unsigned int rnd) {
unsigned int r4 = (unsigned int)(up - lo) / 4u; /* range/4 */
unsigned int p = rnd % (r4 * 2) + (lo + r4);
static IdxT choosePivot (IdxT lo, IdxT up, unsigned int rnd) {
IdxT r4 = (up - lo) / 4; /* range/4 */
IdxT p = rnd % (r4 * 2) + (lo + r4);
lua_assert(lo + r4 <= p && p <= up - r4);
return p;
}
@ -352,11 +354,11 @@ static unsigned int choosePivot (unsigned int lo, unsigned int up,
/*
** QuickSort algorithm (recursive function)
*/
static void auxsort (lua_State *L, unsigned int lo, unsigned int up,
static void auxsort (lua_State *L, IdxT lo, IdxT up,
unsigned int rnd) {
while (lo < up) { /* loop for tail recursion */
unsigned int p; /* Pivot index */
unsigned int n; /* to be used later */
IdxT p; /* Pivot index */
IdxT n; /* to be used later */
/* sort elements 'lo', 'p', and 'up' */
lua_geti(L, 1, lo);
lua_geti(L, 1, up);
@ -400,7 +402,7 @@ static void auxsort (lua_State *L, unsigned int lo, unsigned int up,
n = up - p; /* size of smaller interval */
up = p - 1; /* tail call for [lo .. p - 1] (lower interval) */
}
if ((up - lo) / 128u > n) /* partition too imbalanced? */
if ((up - lo) / 128 > n) /* partition too imbalanced? */
rnd = l_randomizePivot(); /* try a new randomization */
} /* tail call auxsort(L, lo, up, rnd) */
}
@ -410,11 +412,10 @@ static int sort (lua_State *L) {
lua_Integer n = aux_getn(L, 1, TAB_RW);
if (n > 1) { /* non-trivial interval? */
luaL_argcheck(L, n < INT_MAX, 1, "array too big");
luaL_checkstack(L, 40, ""); /* assume array is smaller than 2^40 */
if (!lua_isnoneornil(L, 2)) /* is there a 2nd argument? */
luaL_checktype(L, 2, LUA_TFUNCTION); /* must be a function */
lua_settop(L, 2); /* make sure there are two arguments */
auxsort(L, 1, (unsigned int)n, 0u);
auxsort(L, 1, (IdxT)n, 0);
}
return 0;
}

18
lua/ltm.c
View File

@ -1,5 +1,5 @@
/*
** $Id: ltm.c,v 2.36 2015/11/03 15:47:30 roberto Exp $
** $Id: ltm.c,v 2.37 2016/02/26 19:20:15 roberto Exp $
** Tag methods
** See Copyright Notice in lua.h
*/
@ -83,6 +83,22 @@ const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) {
}
/*
** Return the name of the type of an object. For tables and userdata
** with metatable, use their '__name' metafield, if present.
*/
const char *luaT_objtypename (lua_State *L, const TValue *o) {
Table *mt;
if ((ttistable(o) && (mt = hvalue(o)->metatable) != NULL) ||
(ttisfulluserdata(o) && (mt = uvalue(o)->metatable) != NULL)) {
const TValue *name = luaH_getshortstr(mt, luaS_new(L, "__name"));
if (ttisstring(name)) /* is '__name' a string? */
return getstr(tsvalue(name)); /* use it as type name */
}
return ttypename(ttnov(o)); /* else use standard type name */
}
void luaT_callTM (lua_State *L, const TValue *f, const TValue *p1,
const TValue *p2, TValue *p3, int hasres) {
ptrdiff_t result = savestack(L, p3);

5
lua/ltm.h
View File

@ -1,5 +1,5 @@
/*
** $Id: ltm.h,v 2.21 2014/10/25 11:50:46 roberto Exp $
** $Id: ltm.h,v 2.22 2016/02/26 19:20:15 roberto Exp $
** Tag methods
** See Copyright Notice in lua.h
*/
@ -51,11 +51,12 @@ typedef enum {
#define fasttm(l,et,e) gfasttm(G(l), et, e)
#define ttypename(x) luaT_typenames_[(x) + 1]
#define objtypename(x) ttypename(ttnov(x))
LUAI_DDEC const char *const luaT_typenames_[LUA_TOTALTAGS];
LUAI_FUNC const char *luaT_objtypename (lua_State *L, const TValue *o);
LUAI_FUNC const TValue *luaT_gettm (Table *events, TMS event, TString *ename);
LUAI_FUNC const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o,
TMS event);

10
lua/lua.h
View File

@ -1,5 +1,5 @@
/*
** $Id: lua.h,v 1.329 2015/11/13 17:18:42 roberto Exp $
** $Id: lua.h,v 1.331 2016/05/30 15:53:28 roberto Exp $
** Lua - A Scripting Language
** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
** See Copyright Notice at the end of this file
@ -19,11 +19,11 @@
#define LUA_VERSION_MAJOR "5"
#define LUA_VERSION_MINOR "3"
#define LUA_VERSION_NUM 503
#define LUA_VERSION_RELEASE "2"
#define LUA_VERSION_RELEASE "3"
#define LUA_VERSION "Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
#define LUA_RELEASE LUA_VERSION "." LUA_VERSION_RELEASE
#define LUA_COPYRIGHT LUA_RELEASE " Copyright (C) 1994-2015 Lua.org, PUC-Rio"
#define LUA_COPYRIGHT LUA_RELEASE " Copyright (C) 1994-2016 Lua.org, PUC-Rio"
#define LUA_AUTHORS "R. Ierusalimschy, L. H. de Figueiredo, W. Celes"
@ -361,7 +361,7 @@ LUA_API void (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
#define lua_pushliteral(L, s) lua_pushstring(L, "" s)
#define lua_pushglobaltable(L) \
lua_rawgeti(L, LUA_REGISTRYINDEX, LUA_RIDX_GLOBALS)
((void)lua_rawgeti(L, LUA_REGISTRYINDEX, LUA_RIDX_GLOBALS))
#define lua_tostring(L,i) lua_tolstring(L, (i), NULL)
@ -460,7 +460,7 @@ struct lua_Debug {
/******************************************************************************
* Copyright (C) 1994-2015 Lua.org, PUC-Rio.
* Copyright (C) 1994-2016 Lua.org, PUC-Rio.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the

4
lua/luaconf.h
View File

@ -1,5 +1,5 @@
/*
** $Id: luaconf.h,v 1.254 2015/10/21 18:17:40 roberto Exp $
** $Id: luaconf.h,v 1.255 2016/05/01 20:06:09 roberto Exp $
** Configuration file for Lua
** See Copyright Notice in lua.h
*/
@ -612,7 +612,7 @@
** provide its own implementation.
*/
#if !defined(LUA_USE_C89)
#define lua_number2strx(L,b,sz,f,n) l_sprintf(b,sz,f,n)
#define lua_number2strx(L,b,sz,f,n) ((void)L, l_sprintf(b,sz,f,n))
#endif

105
lua/lvm.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lvm.c,v 2.265 2015/11/23 11:30:45 roberto Exp $
** $Id: lvm.c,v 2.268 2016/02/05 19:59:14 roberto Exp $
** Lua virtual machine
** See Copyright Notice in lua.h
*/
@ -153,55 +153,69 @@ static int forlimit (const TValue *obj, lua_Integer *p, lua_Integer step,
/*
** Complete a table access: if 't' is a table, 'tm' has its metamethod;
** otherwise, 'tm' is NULL.
** Finish the table access 'val = t[key]'.
** if 'slot' is NULL, 't' is not a table; otherwise, 'slot' points to
** t[k] entry (which must be nil).
*/
void luaV_finishget (lua_State *L, const TValue *t, TValue *key, StkId val,
const TValue *tm) {
const TValue *slot) {
int loop; /* counter to avoid infinite loops */
lua_assert(tm != NULL || !ttistable(t));
const TValue *tm; /* metamethod */
for (loop = 0; loop < MAXTAGLOOP; loop++) {
if (tm == NULL) { /* no metamethod (from a table)? */
if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_INDEX)))
if (slot == NULL) { /* 't' is not a table? */
lua_assert(!ttistable(t));
tm = luaT_gettmbyobj(L, t, TM_INDEX);
if (ttisnil(tm))
luaG_typeerror(L, t, "index"); /* no metamethod */
/* else will try the metamethod */
}
if (ttisfunction(tm)) { /* metamethod is a function */
else { /* 't' is a table */
lua_assert(ttisnil(slot));
tm = fasttm(L, hvalue(t)->metatable, TM_INDEX); /* table's metamethod */
if (tm == NULL) { /* no metamethod? */
setnilvalue(val); /* result is nil */
return;
}
/* else will try the metamethod */
}
if (ttisfunction(tm)) { /* is metamethod a function? */
luaT_callTM(L, tm, t, key, val, 1); /* call it */
return;
}
t = tm; /* else repeat access over 'tm' */
if (luaV_fastget(L,t,key,tm,luaH_get)) { /* try fast track */
setobj2s(L, val, tm); /* done */
t = tm; /* else try to access 'tm[key]' */
if (luaV_fastget(L,t,key,slot,luaH_get)) { /* fast track? */
setobj2s(L, val, slot); /* done */
return;
}
/* else repeat */
/* else repeat (tail call 'luaV_finishget') */
}
luaG_runerror(L, "gettable chain too long; possible loop");
luaG_runerror(L, "'__index' chain too long; possible loop");
}
/*
** Main function for table assignment (invoking metamethods if needed).
** Compute 't[key] = val'
** Finish a table assignment 't[key] = val'.
** If 'slot' is NULL, 't' is not a table. Otherwise, 'slot' points
** to the entry 't[key]', or to 'luaO_nilobject' if there is no such
** entry. (The value at 'slot' must be nil, otherwise 'luaV_fastset'
** would have done the job.)
*/
void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
StkId val, const TValue *oldval) {
StkId val, const TValue *slot) {
int loop; /* counter to avoid infinite loops */
for (loop = 0; loop < MAXTAGLOOP; loop++) {
const TValue *tm;
if (oldval != NULL) {
lua_assert(ttistable(t) && ttisnil(oldval));
/* must check the metamethod */
if ((tm = fasttm(L, hvalue(t)->metatable, TM_NEWINDEX)) == NULL &&
/* no metamethod; is there a previous entry in the table? */
(oldval != luaO_nilobject ||
/* no previous entry; must create one. (The next test is
always true; we only need the assignment.) */
(oldval = luaH_newkey(L, hvalue(t), key), 1))) {
const TValue *tm; /* '__newindex' metamethod */
if (slot != NULL) { /* is 't' a table? */
Table *h = hvalue(t); /* save 't' table */
lua_assert(ttisnil(slot)); /* old value must be nil */
tm = fasttm(L, h->metatable, TM_NEWINDEX); /* get metamethod */
if (tm == NULL) { /* no metamethod? */
if (slot == luaO_nilobject) /* no previous entry? */
slot = luaH_newkey(L, h, key); /* create one */
/* no metamethod and (now) there is an entry with given key */
setobj2t(L, cast(TValue *, oldval), val);
invalidateTMcache(hvalue(t));
luaC_barrierback(L, hvalue(t), val);
setobj2t(L, cast(TValue *, slot), val); /* set its new value */
invalidateTMcache(h);
luaC_barrierback(L, h, val);
return;
}
/* else will try the metamethod */
@ -216,11 +230,11 @@ void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
return;
}
t = tm; /* else repeat assignment over 'tm' */
if (luaV_fastset(L, t, key, oldval, luaH_get, val))
if (luaV_fastset(L, t, key, slot, luaH_get, val))
return; /* done */
/* else loop */
}
luaG_runerror(L, "settable chain too long; possible loop");
luaG_runerror(L, "'__newindex' chain too long; possible loop");
}
@ -738,18 +752,28 @@ void luaV_finishOp (lua_State *L) {
luai_threadyield(L); }
/* fetch an instruction and prepare its execution */
#define vmfetch() { \
i = *(ci->u.l.savedpc++); \
if (L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT)) \
Protect(luaG_traceexec(L)); \
ra = RA(i); /* WARNING: any stack reallocation invalidates 'ra' */ \
lua_assert(base == ci->u.l.base); \
lua_assert(base <= L->top && L->top < L->stack + L->stacksize); \
}
#define vmdispatch(o) switch(o)
#define vmcase(l) case l:
#define vmbreak break
/*
** copy of 'luaV_gettable', but protecting call to potential metamethod
** (which can reallocate the stack)
** copy of 'luaV_gettable', but protecting the call to potential
** metamethod (which can reallocate the stack)
*/
#define gettableProtected(L,t,k,v) { const TValue *aux; \
if (luaV_fastget(L,t,k,aux,luaH_get)) { setobj2s(L, v, aux); } \
else Protect(luaV_finishget(L,t,k,v,aux)); }
#define gettableProtected(L,t,k,v) { const TValue *slot; \
if (luaV_fastget(L,t,k,slot,luaH_get)) { setobj2s(L, v, slot); } \
else Protect(luaV_finishget(L,t,k,v,slot)); }
/* same for 'luaV_settable' */
@ -772,14 +796,9 @@ void luaV_execute (lua_State *L) {
base = ci->u.l.base; /* local copy of function's base */
/* main loop of interpreter */
for (;;) {
Instruction i = *(ci->u.l.savedpc++);
Instruction i;
StkId ra;
if (L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT))
Protect(luaG_traceexec(L));
/* WARNING: several calls may realloc the stack and invalidate 'ra' */
ra = RA(i);
lua_assert(base == ci->u.l.base);
lua_assert(base <= L->top && L->top < L->stack + L->stacksize);
vmfetch();
vmdispatch (GET_OPCODE(i)) {
vmcase(OP_MOVE) {
setobjs2s(L, ra, RB(i));

31
lua/lvm.h
View File

@ -1,5 +1,5 @@
/*
** $Id: lvm.h,v 2.39 2015/09/09 13:44:07 roberto Exp $
** $Id: lvm.h,v 2.40 2016/01/05 16:07:21 roberto Exp $
** Lua virtual machine
** See Copyright Notice in lua.h
*/
@ -49,25 +49,24 @@
/*
** fast track for 'gettable': 1 means 'aux' points to resulted value;
** 0 means 'aux' is metamethod (if 't' is a table) or NULL. 'f' is
** the raw get function to use.
** fast track for 'gettable': if 't' is a table and 't[k]' is not nil,
** return 1 with 'slot' pointing to 't[k]' (final result). Otherwise,
** return 0 (meaning it will have to check metamethod) with 'slot'
** pointing to a nil 't[k]' (if 't' is a table) or NULL (otherwise).
** 'f' is the raw get function to use.
*/
#define luaV_fastget(L,t,k,aux,f) \
#define luaV_fastget(L,t,k,slot,f) \
(!ttistable(t) \
? (aux = NULL, 0) /* not a table; 'aux' is NULL and result is 0 */ \
: (aux = f(hvalue(t), k), /* else, do raw access */ \
!ttisnil(aux) ? 1 /* result not nil? 'aux' has it */ \
: (aux = fasttm(L, hvalue(t)->metatable, TM_INDEX), /* get metamethod */\
aux != NULL ? 0 /* has metamethod? must call it */ \
: (aux = luaO_nilobject, 1)))) /* else, final result is nil */
? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \
: (slot = f(hvalue(t), k), /* else, do raw access */ \
!ttisnil(slot))) /* result not nil? */
/*
** standard implementation for 'gettable'
*/
#define luaV_gettable(L,t,k,v) { const TValue *aux; \
if (luaV_fastget(L,t,k,aux,luaH_get)) { setobj2s(L, v, aux); } \
else luaV_finishget(L,t,k,v,aux); }
#define luaV_gettable(L,t,k,v) { const TValue *slot; \
if (luaV_fastget(L,t,k,slot,luaH_get)) { setobj2s(L, v, slot); } \
else luaV_finishget(L,t,k,v,slot); }
/*
@ -100,9 +99,9 @@ LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, int mode);
LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
StkId val, const TValue *tm);
StkId val, const TValue *slot);
LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
StkId val, const TValue *oldval);
StkId val, const TValue *slot);
LUAI_FUNC void luaV_finishOp (lua_State *L);
LUAI_FUNC void luaV_execute (lua_State *L);
LUAI_FUNC void luaV_concat (lua_State *L, int total);