diff options
Diffstat (limited to '3rdparty/lua/src/ltm.c')
-rw-r--r-- | 3rdparty/lua/src/ltm.c | 86 |
1 files changed, 76 insertions, 10 deletions
diff --git a/3rdparty/lua/src/ltm.c b/3rdparty/lua/src/ltm.c index 69b4ed77271..25b46b17f90 100644 --- a/3rdparty/lua/src/ltm.c +++ b/3rdparty/lua/src/ltm.c @@ -1,22 +1,27 @@ /* -** $Id: ltm.c,v 2.14.1.1 2013/04/12 18:48:47 roberto Exp $ +** $Id: ltm.c,v 2.33 2014/11/21 12:15:57 roberto Exp $ ** Tag methods ** See Copyright Notice in lua.h */ - -#include <string.h> - #define ltm_c #define LUA_CORE +#include "lprefix.h" + + +#include <string.h> + #include "lua.h" +#include "ldebug.h" +#include "ldo.h" #include "lobject.h" #include "lstate.h" #include "lstring.h" #include "ltable.h" #include "ltm.h" +#include "lvm.h" static const char udatatypename[] = "userdata"; @@ -25,7 +30,7 @@ LUAI_DDEF const char *const luaT_typenames_[LUA_TOTALTAGS] = { "no value", "nil", "boolean", udatatypename, "number", "string", "table", "function", udatatypename, "thread", - "proto", "upval" /* these last two cases are used for tests only */ + "proto" /* this last case is used for tests only */ }; @@ -33,14 +38,16 @@ void luaT_init (lua_State *L) { static const char *const luaT_eventname[] = { /* ORDER TM */ "__index", "__newindex", "__gc", "__mode", "__len", "__eq", - "__add", "__sub", "__mul", "__div", "__mod", - "__pow", "__unm", "__lt", "__le", + "__add", "__sub", "__mul", "__mod", "__pow", + "__div", "__idiv", + "__band", "__bor", "__bxor", "__shl", "__shr", + "__unm", "__bnot", "__lt", "__le", "__concat", "__call" }; int i; for (i=0; i<TM_N; i++) { G(L)->tmname[i] = luaS_new(L, luaT_eventname[i]); - luaS_fix(G(L)->tmname[i]); /* never collect these names */ + luaC_fix(L, obj2gco(G(L)->tmname[i])); /* never collect these names */ } } @@ -62,7 +69,7 @@ const TValue *luaT_gettm (Table *events, TMS event, TString *ename) { const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) { Table *mt; - switch (ttypenv(o)) { + switch (ttnov(o)) { case LUA_TTABLE: mt = hvalue(o)->metatable; break; @@ -70,8 +77,67 @@ const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) { mt = uvalue(o)->metatable; break; default: - mt = G(L)->mt[ttypenv(o)]; + mt = G(L)->mt[ttnov(o)]; } return (mt ? luaH_getstr(mt, G(L)->tmname[event]) : luaO_nilobject); } + +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); + setobj2s(L, L->top++, f); /* push function (assume EXTRA_STACK) */ + setobj2s(L, L->top++, p1); /* 1st argument */ + setobj2s(L, L->top++, p2); /* 2nd argument */ + if (!hasres) /* no result? 'p3' is third argument */ + setobj2s(L, L->top++, p3); /* 3rd argument */ + /* metamethod may yield only when called from Lua code */ + luaD_call(L, L->top - (4 - hasres), hasres, isLua(L->ci)); + if (hasres) { /* if has result, move it to its place */ + p3 = restorestack(L, result); + setobjs2s(L, p3, --L->top); + } +} + + +int luaT_callbinTM (lua_State *L, const TValue *p1, const TValue *p2, + StkId res, TMS event) { + const TValue *tm = luaT_gettmbyobj(L, p1, event); /* try first operand */ + if (ttisnil(tm)) + tm = luaT_gettmbyobj(L, p2, event); /* try second operand */ + if (ttisnil(tm)) return 0; + luaT_callTM(L, tm, p1, p2, res, 1); + return 1; +} + + +void luaT_trybinTM (lua_State *L, const TValue *p1, const TValue *p2, + StkId res, TMS event) { + if (!luaT_callbinTM(L, p1, p2, res, event)) { + switch (event) { + case TM_CONCAT: + luaG_concaterror(L, p1, p2); + case TM_BAND: case TM_BOR: case TM_BXOR: + case TM_SHL: case TM_SHR: case TM_BNOT: { + lua_Number dummy; + if (tonumber(p1, &dummy) && tonumber(p2, &dummy)) + luaG_tointerror(L, p1, p2); + else + luaG_opinterror(L, p1, p2, "perform bitwise operation on"); + /* else go through */ + } + default: + luaG_opinterror(L, p1, p2, "perform arithmetic on"); + } + } +} + + +int luaT_callorderTM (lua_State *L, const TValue *p1, const TValue *p2, + TMS event) { + if (!luaT_callbinTM(L, p1, p2, L->top, event)) + return -1; /* no metamethod */ + else + return !l_isfalse(L->top); +} + |