mirror of
https://github.com/lua/lua
synced 2024-09-30 05:39:22 +02:00
first version of code optimizer
This commit is contained in:
Roberto Ierusalimschy
parent
39e1f079bd
commit
3bc925138e
5 changed files with 314 additions and 272 deletions
36
lopcodes.h
36
lopcodes.h
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@ -1,5 +1,5 @@
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/*
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** $Id: lopcodes.h,v 1.39 2000/02/11 16:52:54 roberto Exp roberto $
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** $Id: lopcodes.h,v 1.40 2000/02/14 16:51:08 roberto Exp roberto $
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** Opcodes for Lua virtual machine
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** See Copyright Notice in lua.h
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*/
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@ -47,6 +47,11 @@
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/*
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** K = U argument used as index to `kstr'
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** J = S argument used as jump offset (relative to pc of next instruction)
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*/
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typedef enum {
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/* name parm before after side effect
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-----------------------------------------------------------------------------*/
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@ -60,24 +65,25 @@ PUSHNIL,/* U - nil_0-nil_u */
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POP,/* U a_u-a_1 - */
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PUSHINT,/* S - (real)s */
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PUSHSTRING,/* U - KSTR[u] */
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PUSHNUMBER,/* U - KNUM[u] */
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PUSHSTRING,/* K - KSTR[k] */
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PUSHNUM,/* U - KNUM[u] */
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PUSHNEGNUM,/* U - -KNUM[u] */
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PUSHUPVALUE,/* U - Closure[u] */
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PUSHLOCAL,/* U - LOC[u] */
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GETGLOBAL,/* U - VAR[CNST[u]] */
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GETGLOBAL,/* K - VAR[CNST[k]] */
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GETTABLE,/* - i t t[i] */
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GETDOTTED,/* U t t[CNST[u]] */
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PUSHSELF,/* U t t t[CNST[u]] */
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GETDOTTED,/* K t t[KSTR[k]] */
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PUSHSELF,/* K t t t[KSTR[k]] */
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CREATETABLE,/* U - newarray(size = u) */
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SETLOCAL,/* U x - LOC[u]=x */
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SETGLOBAL,/* U x - VAR[CNST[u]]=x */
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SETGLOBAL,/* K x - VAR[KSTR[k]]=x */
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SETTABLEPOP,/* - v i t - t[i]=v */
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SETTABLE,/* U v a_u-a_1 i t a_u-a_1 i t t[i]=v */
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SETTABLE,/* U v a_u-a_1 i t a_u-a_1 i t t[i]=v */
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SETLIST,/* A B v_b-v_0 t t t[i+a*FPF]=v_i */
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SETMAP,/* U v_u k_u - v_0 k_0 t t t[k_i]=v_i */
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@ -88,7 +94,9 @@ LTOP,/* - y x (x<y)? 1 : nil */
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LEOP,/* - y x (x<y)? 1 : nil */
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GTOP,/* - y x (x>y)? 1 : nil */
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GEOP,/* - y x (x>=y)? 1 : nil */
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ADDOP,/* - y x x+y */
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ADDI,/* S x x+s */
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SUBOP,/* - y x x-y */
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MULTOP,/* - y x x*y */
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DIVOP,/* - y x x/y */
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@ -97,11 +105,11 @@ CONCOP,/* - y x x..y */
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MINUSOP,/* - x -x */
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NOTOP,/* - x (x==nil)? 1 : nil */
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ONTJMP,/* S x (x!=nil)? x : - (x!=nil)? PC+=s */
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ONFJMP,/* S x (x==nil)? x : - (x==nil)? PC+=s */
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JMP,/* S - - PC+=s */
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IFTJMP,/* S x - (x!=nil)? PC+=s */
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IFFJMP,/* S x - (x==nil)? PC+=s */
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ONTJMP,/* J x (x!=nil)? x : - (x!=nil)? PC+=s */
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ONFJMP,/* J x (x==nil)? x : - (x==nil)? PC+=s */
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JMP,/* J - - PC+=s */
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IFTJMP,/* J x - (x!=nil)? PC+=s */
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IFFJMP,/* J x - (x==nil)? PC+=s */
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CLOSURE,/* A B v_b-v_1 closure(CNST[a], v_b-v_1) */
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@ -111,7 +119,7 @@ SETLINE/* U - - LINE=u */
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#define RFIELDS_PER_FLUSH 32 /* records (SETMAP) */
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#define LFIELDS_PER_FLUSH 64 /* FPF - lists (SETLIST) (<MAXARG_B) */
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#define LFIELDS_PER_FLUSH 64 /* FPF - lists (SETLIST) (<=MAXARG_B) */
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#endif
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399
lparser.c
399
lparser.c
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@ -1,5 +1,5 @@
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/*
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** $Id: lparser.c,v 1.58 2000/02/11 16:52:54 roberto Exp roberto $
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** $Id: lparser.c,v 1.59 2000/02/14 16:51:08 roberto Exp roberto $
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** LL(1) Parser and code generator for Lua
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** See Copyright Notice in lua.h
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*/
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@ -8,6 +8,9 @@
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#include <stdio.h>
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#include <string.h>
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#define LUA_REENTRANT
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#include "lcode.h"
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#include "ldo.h"
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#include "lfunc.h"
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#include "llex.h"
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@ -19,50 +22,6 @@
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#include "lstring.h"
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/* maximum number of local variables */
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#ifndef MAXLOCALS
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#define MAXLOCALS 200 /* arbitrary limit (<MAXARG_B) */
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#endif
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/* maximum number of upvalues */
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#ifndef MAXUPVALUES
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#define MAXUPVALUES 32 /* arbitrary limit (<MAXARG_B) */
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#endif
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/* maximum number of variables in the left side of an assignment */
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#ifndef MAXVARSLH
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#define MAXVARSLH 100 /* arbitrary limit (<MAXARG_B) */
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#endif
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/* maximum number of parameters in a function */
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#ifndef MAXPARAMS
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#define MAXPARAMS 100 /* arbitrary limit (<MAXLOCALS) */
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#endif
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/*
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** Variable descriptor:
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** must include an `exp' option because LL(1) cannot distinguish
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** between variables, upvalues and function calls on first sight.
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*/
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typedef enum {
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VGLOBAL, /* info is constant index of global name */
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VLOCAL, /* info is stack index */
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VDOT, /* info is constant index of index name */
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VINDEXED, /* no info (table and index are on the stack) */
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VEXP /* info is pc index of a call (or 0 if exp is closed) */
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} varkind;
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typedef struct vardesc {
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varkind k;
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int info;
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} vardesc;
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/*
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** Expression List descriptor:
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** tells number of expressions in the list,
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@ -87,19 +46,6 @@ typedef struct constdesc {
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} constdesc;
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/* state needed to generate code for a given function */
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typedef struct FuncState {
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TProtoFunc *f; /* current function header */
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struct FuncState *prev; /* enclosing function */
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int pc; /* next position to code */
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int stacksize; /* number of values on activation register */
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int nlocalvar; /* number of active local variables */
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int nupvalues; /* number of upvalues */
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int nvars; /* number of entries in f->locvars (-1 if no debug information) */
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int lastsetline; /* line where last SETLINE was issued */
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vardesc upvalues[MAXUPVALUES]; /* upvalues */
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TaggedString *localvar[MAXLOCALS]; /* store local variable names */
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} FuncState;
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/*
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@ -112,12 +58,59 @@ static void expr (LexState *ls, vardesc *v);
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static void exp1 (LexState *ls);
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static void next (LexState *ls) {
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ls->token = luaX_lex(ls);
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}
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static void luaY_error (LexState *ls, const char *msg) {
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luaX_error(ls, msg, ls->token);
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}
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static void error_expected (LexState *ls, int token) {
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char buff[100], t[TOKEN_LEN];
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luaX_token2str(token, t);
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sprintf(buff, "`%.20s' expected", t);
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luaY_error(ls, buff);
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}
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static void error_unexpected (LexState *ls) {
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luaY_error(ls, "unexpected token");
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}
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static void error_unmatched (LexState *ls, int what, int who, int where) {
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if (where == ls->linenumber)
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error_expected(ls, what);
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else {
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char buff[100];
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char t_what[TOKEN_LEN], t_who[TOKEN_LEN];
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luaX_token2str(what, t_what);
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luaX_token2str(who, t_who);
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sprintf(buff, "`%.20s' expected (to close `%.20s' at line %d)",
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t_what, t_who, where);
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luaY_error(ls, buff);
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}
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}
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static void check (LexState *ls, int c) {
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if (ls->token != c)
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error_expected(ls, c);
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next(ls);
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}
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static int optional (LexState *ls, int c) {
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if (ls->token == c) {
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next(ls);
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return 1;
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}
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else return 0;
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}
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static void checklimit (LexState *ls, int val, int limit, const char *msg) {
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if (val > limit) {
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char buff[100];
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@ -127,25 +120,12 @@ static void checklimit (LexState *ls, int val, int limit, const char *msg) {
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}
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static int code_instruction (LexState *ls, Instruction i) {
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FuncState *fs = ls->fs;
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luaM_growvector(ls->L, fs->f->code, fs->pc, 1, Instruction, codeEM, MAXARG_S);
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fs->f->code[fs->pc] = i;
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return fs->pc++;
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}
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static void fix_jump (LexState *ls, int pc, int dest) {
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Instruction *jmp = &ls->fs->f->code[pc];
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/* jump is relative to position following jump instruction */
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*jmp = SETARG_S(*jmp, dest-(pc+1));
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}
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static void deltastack (LexState *ls, int delta) {
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FuncState *fs = ls->fs;
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fs->stacksize += delta;
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if (delta > 0 && fs->stacksize > fs->f->maxstacksize) {
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checklimit(ls, fs->stacksize, MAXSTACK, "temporaries or local variables");
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fs->f->maxstacksize = fs->stacksize;
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}
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}
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@ -153,7 +133,7 @@ static void deltastack (LexState *ls, int delta) {
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static int aux_code (LexState *ls, OpCode op, Instruction i, int delta) {
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deltastack(ls, delta);
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return code_instruction(ls, SET_OPCODE(i, op));
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return luaK_code(ls, SET_OPCODE(i, op));
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}
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@ -182,6 +162,22 @@ static int code_AB (LexState *ls, OpCode op, int a, int b, int delta) {
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}
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static void check_debugline (LexState *ls) {
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if (ls->L->debug && ls->linenumber != ls->fs->lastsetline) {
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code_U(ls, SETLINE, ls->linenumber, 0);
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ls->fs->lastsetline = ls->linenumber;
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}
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}
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static void check_match (LexState *ls, int what, int who, int where) {
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if (ls->token != what)
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error_unmatched(ls, what, who, where);
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check_debugline(ls); /* to `mark' the `what' */
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next(ls);
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}
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static void code_kstr (LexState *ls, int c) {
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code_U(ls, PUSHSTRING, c, 1);
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}
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@ -228,10 +224,26 @@ static int real_constant (LexState *ls, real r) {
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static void code_number (LexState *ls, real f) {
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if ((real)(-MAXARG_S) <= f && f <= (real)MAXARG_S && (int)f == f)
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if (f <= (real)MAXARG_S && (int)f == f)
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code_S(ls, PUSHINT, (int)f, 1); /* f has a short integer value */
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else
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code_U(ls, PUSHNUMBER, real_constant(ls, f), 1);
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code_U(ls, PUSHNUM, real_constant(ls, f), 1);
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}
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static int checkname (LexState *ls) {
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int sc;
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if (ls->token != NAME)
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luaY_error(ls, "<name> expected");
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sc = string_constant(ls, ls->fs, ls->seminfo.ts);
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next(ls);
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return sc;
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}
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static TaggedString *str_checkname (LexState *ls) {
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int i = checkname(ls); /* this call may realloc `f->consts' */
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return ls->fs->f->kstr[i];
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}
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@ -327,15 +339,6 @@ static void pushupvalue (LexState *ls, TaggedString *n) {
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}
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static void check_debugline (LexState *ls) {
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if (ls->L->debug && ls->linenumber != ls->fs->lastsetline) {
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code_U(ls, SETLINE, ls->linenumber, 0);
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ls->fs->lastsetline = ls->linenumber;
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}
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}
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static void adjuststack (LexState *ls, int n) {
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if (n > 0)
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code_U(ls, POP, n, -n);
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@ -344,7 +347,7 @@ static void adjuststack (LexState *ls, int n) {
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}
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static void close_exp (LexState *ls, int pc, int nresults) {
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static void close_call (LexState *ls, int pc, int nresults) {
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if (pc > 0) { /* expression is an open function call? */
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Instruction *i = &ls->fs->f->code[pc];
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*i = SETARG_B(*i, nresults); /* set nresults */
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@ -364,10 +367,10 @@ static void adjust_mult_assign (LexState *ls, int nvars, listdesc *d) {
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diff--; /* do not count function call itself */
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if (diff <= 0) { /* more variables than values? */
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/* function call must provide extra values */
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close_exp(ls, d->pc, -diff);
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close_call(ls, d->pc, -diff);
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}
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else { /* more values than variables */
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close_exp(ls, d->pc, 0); /* call should provide no value */
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close_call(ls, d->pc, 0); /* call should provide no value */
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adjuststack(ls, diff); /* pop eventual extra values */
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}
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}
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@ -390,16 +393,21 @@ static void code_args (LexState *ls, int nparams, int dots) {
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}
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static void unloaddot (LexState *ls, vardesc *v) {
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/* dotted variables <a.x> must be stored as regular indexed vars <a["x"]> */
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if (v->k == VDOT) {
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code_kstr(ls, v->info);
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v->k = VINDEXED;
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static int getvarname (LexState *ls, vardesc *var) {
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switch (var->k) {
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case VGLOBAL:
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return var->info;
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case VLOCAL:
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return string_constant(ls, ls->fs, ls->fs->localvar[var->info]);
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break;
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default:
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error_unexpected(ls); /* there is no `var name' */
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return 0; /* to avoid warnings */
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}
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}
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static void lua_pushvar (LexState *ls, vardesc *var) {
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static void close_exp (LexState *ls, vardesc *var) {
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switch (var->k) {
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case VLOCAL:
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code_U(ls, PUSHLOCAL, var->info, 1);
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@ -408,14 +416,11 @@ static void lua_pushvar (LexState *ls, vardesc *var) {
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code_U(ls, GETGLOBAL, var->info, 1);
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assertglobal(ls, var->info); /* make sure that there is a global */
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break;
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case VDOT:
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code_U(ls, GETDOTTED, var->info, 0);
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break;
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case VINDEXED:
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code_0(ls, GETTABLE, -1);
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break;
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case VEXP:
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close_exp(ls, var->info, 1); /* function must return 1 value */
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close_call(ls, var->info, 1); /* call must return 1 value */
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break;
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}
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var->k = VEXP;
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@ -445,7 +450,7 @@ static void func_onstack (LexState *ls, FuncState *func) {
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TProtoFunc *f = ls->fs->f;
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int i;
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for (i=0; i<func->nupvalues; i++)
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lua_pushvar(ls, &func->upvalues[i]);
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close_exp(ls, &func->upvalues[i]);
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luaM_growvector(ls->L, f->kproto, f->nkproto, 1, TProtoFunc *,
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constantEM, MAXARG_A);
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f->kproto[f->nkproto++] = func->f;
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@ -466,6 +471,7 @@ static void init_state (LexState *ls, FuncState *fs, TaggedString *source) {
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fs->f = f;
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f->source = source;
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fs->pc = 0;
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fs->last_pc = -1; /* invalid index to signal no last instruction */
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f->code = NULL;
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f->maxstacksize = 0;
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f->numparams = 0; /* default for main chunk */
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@ -495,76 +501,6 @@ static void close_func (LexState *ls) {
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}
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static void next (LexState *ls) {
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ls->token = luaX_lex(ls);
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}
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static void error_expected (LexState *ls, int token) {
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char buff[100], t[TOKEN_LEN];
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luaX_token2str(token, t);
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sprintf(buff, "`%.20s' expected", t);
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luaY_error(ls, buff);
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}
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||||
static void error_unexpected (LexState *ls) {
|
||||
luaY_error(ls, "unexpected token");
|
||||
}
|
||||
|
||||
|
||||
static void error_unmatched (LexState *ls, int what, int who, int where) {
|
||||
if (where == ls->linenumber)
|
||||
error_expected(ls, what);
|
||||
else {
|
||||
char buff[100];
|
||||
char t_what[TOKEN_LEN], t_who[TOKEN_LEN];
|
||||
luaX_token2str(what, t_what);
|
||||
luaX_token2str(who, t_who);
|
||||
sprintf(buff, "`%.20s' expected (to close `%.20s' at line %d)",
|
||||
t_what, t_who, where);
|
||||
luaY_error(ls, buff);
|
||||
}
|
||||
}
|
||||
|
||||
static void check (LexState *ls, int c) {
|
||||
if (ls->token != c)
|
||||
error_expected(ls, c);
|
||||
next(ls);
|
||||
}
|
||||
|
||||
static void check_match (LexState *ls, int what, int who, int where) {
|
||||
if (ls->token != what)
|
||||
error_unmatched(ls, what, who, where);
|
||||
check_debugline(ls); /* to `mark' the `what' */
|
||||
next(ls);
|
||||
}
|
||||
|
||||
static int checkname (LexState *ls) {
|
||||
int sc;
|
||||
if (ls->token != NAME)
|
||||
luaY_error(ls, "<name> expected");
|
||||
sc = string_constant(ls, ls->fs, ls->seminfo.ts);
|
||||
next(ls);
|
||||
return sc;
|
||||
}
|
||||
|
||||
|
||||
static TaggedString *str_checkname (LexState *ls) {
|
||||
int i = checkname(ls); /* this call may realloc `f->consts' */
|
||||
return ls->fs->f->kstr[i];
|
||||
}
|
||||
|
||||
|
||||
static int optional (LexState *ls, int c) {
|
||||
if (ls->token == c) {
|
||||
next(ls);
|
||||
return 1;
|
||||
}
|
||||
else return 0;
|
||||
}
|
||||
|
||||
|
||||
TProtoFunc *luaY_parser (lua_State *L, ZIO *z) {
|
||||
struct LexState lexstate;
|
||||
struct FuncState funcstate;
|
||||
|
|
@ -591,14 +527,14 @@ static void explist1 (LexState *ls, listdesc *d) {
|
|||
d->n = 1;
|
||||
while (ls->token == ',') {
|
||||
d->n++;
|
||||
lua_pushvar(ls, &v);
|
||||
close_exp(ls, &v);
|
||||
next(ls);
|
||||
expr(ls, &v);
|
||||
}
|
||||
if (v.k == VEXP)
|
||||
d->pc = v.info;
|
||||
else {
|
||||
lua_pushvar(ls, &v);
|
||||
close_exp(ls, &v);
|
||||
d->pc = 0;
|
||||
}
|
||||
}
|
||||
|
|
@ -628,7 +564,7 @@ static int funcparams (LexState *ls, int slf) {
|
|||
next(ls);
|
||||
explist(ls, &e);
|
||||
check_match(ls, ')', '(', line);
|
||||
close_exp(ls, e.pc, MULT_RET); /* close 1 for old semantics */
|
||||
close_call(ls, e.pc, MULT_RET); /* close 1 for old semantics */
|
||||
break;
|
||||
}
|
||||
|
||||
|
|
@ -655,14 +591,14 @@ static void var_or_func_tail (LexState *ls, vardesc *v) {
|
|||
switch (ls->token) {
|
||||
case '.': /* var_or_func_tail -> '.' NAME */
|
||||
next(ls);
|
||||
lua_pushvar(ls, v); /* `v' must be on stack */
|
||||
v->k = VDOT;
|
||||
v->info = checkname(ls);
|
||||
close_exp(ls, v); /* `v' must be on stack */
|
||||
code_kstr(ls, checkname(ls));
|
||||
v->k = VINDEXED;
|
||||
break;
|
||||
|
||||
case '[': /* var_or_func_tail -> '[' exp1 ']' */
|
||||
next(ls);
|
||||
lua_pushvar(ls, v); /* `v' must be on stack */
|
||||
close_exp(ls, v); /* `v' must be on stack */
|
||||
exp1(ls);
|
||||
check(ls, ']');
|
||||
v->k = VINDEXED;
|
||||
|
|
@ -672,7 +608,7 @@ static void var_or_func_tail (LexState *ls, vardesc *v) {
|
|||
int name;
|
||||
next(ls);
|
||||
name = checkname(ls);
|
||||
lua_pushvar(ls, v); /* `v' must be on stack */
|
||||
close_exp(ls, v); /* `v' must be on stack */
|
||||
code_U(ls, PUSHSELF, name, 1);
|
||||
v->k = VEXP;
|
||||
v->info = funcparams(ls, 1);
|
||||
|
|
@ -680,7 +616,7 @@ static void var_or_func_tail (LexState *ls, vardesc *v) {
|
|||
}
|
||||
|
||||
case '(': case STRING: case '{': /* var_or_func_tail -> funcparams */
|
||||
lua_pushvar(ls, v); /* `v' must be on stack */
|
||||
close_exp(ls, v); /* `v' must be on stack */
|
||||
v->k = VEXP;
|
||||
v->info = funcparams(ls, 0);
|
||||
break;
|
||||
|
|
@ -711,6 +647,7 @@ static void var_or_func (LexState *ls, vardesc *v) {
|
|||
** =======================================================================
|
||||
*/
|
||||
|
||||
|
||||
static void recfield (LexState *ls) {
|
||||
/* recfield -> (NAME | '['exp1']') = exp1 */
|
||||
switch (ls->token) {
|
||||
|
|
@ -788,23 +725,14 @@ static void constructor_part (LexState *ls, constdesc *cd) {
|
|||
vardesc v;
|
||||
expr(ls, &v);
|
||||
if (ls->token == '=') {
|
||||
switch (v.k) {
|
||||
case VGLOBAL:
|
||||
code_kstr(ls, v.info);
|
||||
break;
|
||||
case VLOCAL:
|
||||
code_string(ls, ls->fs->localvar[v.info]);
|
||||
break;
|
||||
default:
|
||||
error_unexpected(ls);
|
||||
}
|
||||
next(ls);
|
||||
exp1(ls);
|
||||
code_kstr(ls, getvarname(ls, &v));
|
||||
next(ls); /* skip '=' */
|
||||
exp1(ls);
|
||||
cd->n = recfields(ls);
|
||||
cd->k = 1; /* record */
|
||||
}
|
||||
else {
|
||||
lua_pushvar(ls, &v);
|
||||
close_exp(ls, &v);
|
||||
cd->n = listfields(ls);
|
||||
cd->k = 0; /* list */
|
||||
}
|
||||
|
|
@ -923,18 +851,12 @@ static void pop_to (LexState *ls, stack_op *s, int prio) {
|
|||
}
|
||||
}
|
||||
|
||||
static void simpleexp (LexState *ls, vardesc *v, stack_op *s) {
|
||||
static void simpleexp (LexState *ls, vardesc *v) {
|
||||
check_debugline(ls);
|
||||
switch (ls->token) {
|
||||
case NUMBER: { /* simpleexp -> NUMBER */
|
||||
real r = ls->seminfo.r;
|
||||
next(ls);
|
||||
/* dirty trick: check whether it is a -NUMBER not followed by '^' */
|
||||
/* (because the priority of '^' is higher than the priority of '-') */
|
||||
if (s->top > 0 && s->ops[s->top-1] == INDMINUS && ls->token != '^') {
|
||||
s->top--; /* remove '-' from stack */
|
||||
r = -r;
|
||||
}
|
||||
code_number(ls, r);
|
||||
break;
|
||||
}
|
||||
|
|
@ -982,7 +904,7 @@ static void prefixexp (LexState *ls, vardesc *v, stack_op *s) {
|
|||
push(ls, s, (ls->token==NOT)?INDNOT:INDMINUS);
|
||||
next(ls);
|
||||
}
|
||||
simpleexp(ls, v, s);
|
||||
simpleexp(ls, v);
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -992,16 +914,16 @@ static void arith_exp (LexState *ls, vardesc *v) {
|
|||
s.top = 0;
|
||||
prefixexp(ls, v, &s);
|
||||
while ((op = binop(ls->token)) >= 0) {
|
||||
lua_pushvar(ls, v);
|
||||
close_exp(ls, v);
|
||||
/* '^' is right associative, so must 'simulate' a higher priority */
|
||||
pop_to(ls, &s, (op == POW)?priority[op]+1:priority[op]);
|
||||
push(ls, &s, op);
|
||||
next(ls);
|
||||
prefixexp(ls, v, &s);
|
||||
lua_pushvar(ls, v);
|
||||
close_exp(ls, v);
|
||||
}
|
||||
if (s.top > 0) {
|
||||
lua_pushvar(ls, v);
|
||||
close_exp(ls, v);
|
||||
pop_to(ls, &s, 0);
|
||||
}
|
||||
}
|
||||
|
|
@ -1010,7 +932,7 @@ static void arith_exp (LexState *ls, vardesc *v) {
|
|||
static void exp1 (LexState *ls) {
|
||||
vardesc v;
|
||||
expr(ls, &v);
|
||||
lua_pushvar(ls, &v);
|
||||
close_exp(ls, &v);
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -1020,12 +942,12 @@ static void expr (LexState *ls, vardesc *v) {
|
|||
while (ls->token == AND || ls->token == OR) {
|
||||
OpCode op = (ls->token == AND) ? ONFJMP : ONTJMP;
|
||||
int pc;
|
||||
lua_pushvar(ls, v);
|
||||
close_exp(ls, v);
|
||||
next(ls);
|
||||
pc = code_S(ls, op, 0, -1);
|
||||
arith_exp(ls, v);
|
||||
lua_pushvar(ls, v);
|
||||
fix_jump(ls, pc, ls->fs->pc);
|
||||
close_exp(ls, v);
|
||||
luaK_fixjump(ls, pc, ls->fs->pc);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -1054,7 +976,6 @@ static void block (LexState *ls) {
|
|||
static int assignment (LexState *ls, vardesc *v, int nvars) {
|
||||
int left = 0;
|
||||
checklimit(ls, nvars, MAXVARSLH, "variables in a multiple assignment");
|
||||
unloaddot(ls, v);
|
||||
if (ls->token == ',') { /* assignment -> ',' NAME assignment */
|
||||
vardesc nv;
|
||||
next(ls);
|
||||
|
|
@ -1083,19 +1004,37 @@ static int assignment (LexState *ls, vardesc *v, int nvars) {
|
|||
}
|
||||
|
||||
|
||||
/* maximum size of a while condition */
|
||||
#ifndef MAX_WHILE_EXP
|
||||
#define MAX_WHILE_EXP 200 /* arbitrary limit */
|
||||
#endif
|
||||
|
||||
static void whilestat (LexState *ls, int line) {
|
||||
/* whilestat -> WHILE exp1 DO block END */
|
||||
Instruction buffer[MAX_WHILE_EXP];
|
||||
FuncState *fs = ls->fs;
|
||||
int while_init = fs->pc;
|
||||
int j1;
|
||||
next(ls);
|
||||
exp1(ls);
|
||||
j1 = code_U(ls, IFFJMP, 0, -1); /* jump to exit loop */
|
||||
int cond_size;
|
||||
int i;
|
||||
next(ls); /* skip WHILE */
|
||||
exp1(ls); /* read condition */
|
||||
cond_size = fs->pc - while_init;
|
||||
/* save condition (to move it to after body) */
|
||||
if (cond_size > MAX_WHILE_EXP)
|
||||
luaY_error(ls, "while condition too complex");
|
||||
for (i=0; i<cond_size; i++) buffer[i] = fs->f->code[while_init+i];
|
||||
/* go back to state prior condition */
|
||||
fs->pc = while_init;
|
||||
deltastack(ls, -1);
|
||||
code_S(ls, JMP, 0, 0); /* initial jump to condition */
|
||||
check(ls, DO);
|
||||
block(ls);
|
||||
check_match(ls, END, WHILE, line);
|
||||
fix_jump(ls, code_U(ls, JMP, 0, 0), while_init); /* jump to keep loop */
|
||||
fix_jump(ls, j1, fs->pc);
|
||||
luaK_fixjump(ls, while_init, fs->pc);
|
||||
/* copy condition to new position, and correct stack */
|
||||
for (i=0; i<cond_size; i++) luaK_primitivecode(ls, buffer[i]);
|
||||
deltastack(ls, 1);
|
||||
luaK_fixjump(ls, code_S(ls, IFTJMP, 0, -1), while_init+1);
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -1107,7 +1046,7 @@ static void repeatstat (LexState *ls, int line) {
|
|||
block(ls);
|
||||
check_match(ls, UNTIL, REPEAT, line);
|
||||
exp1(ls);
|
||||
fix_jump(ls, code_U(ls, IFFJMP, 0, -1), repeat_init);
|
||||
luaK_fixjump(ls, code_S(ls, IFFJMP, 0, -1), repeat_init);
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -1157,7 +1096,7 @@ static int funcname (LexState *ls, vardesc *v) {
|
|||
if (ls->token == ':' || ls->token == '.') {
|
||||
needself = (ls->token == ':');
|
||||
next(ls);
|
||||
lua_pushvar(ls, v);
|
||||
close_exp(ls, v);
|
||||
code_kstr(ls, checkname(ls));
|
||||
v->k = VINDEXED;
|
||||
}
|
||||
|
|
@ -1188,7 +1127,7 @@ static void namestat (LexState *ls) {
|
|||
if (v.k == VEXP) { /* stat -> func */
|
||||
if (v.info == 0) /* is just an upper value? */
|
||||
luaY_error(ls, "syntax error");
|
||||
close_exp(ls, v.info, 0);
|
||||
close_call(ls, v.info, 0); /* call statement uses no results */
|
||||
}
|
||||
else { /* stat -> ['%'] NAME assignment */
|
||||
int left = assignment(ls, &v, 1);
|
||||
|
|
@ -1200,14 +1139,16 @@ static void namestat (LexState *ls) {
|
|||
static void ifpart (LexState *ls, int line) {
|
||||
/* ifpart -> cond THEN block [ELSE block | ELSEIF ifpart] */
|
||||
FuncState *fs = ls->fs;
|
||||
int c;
|
||||
int je;
|
||||
int c; /* address of the conditional jump */
|
||||
int je; /* address of the unconditional jump (to skip `else' part) */
|
||||
int elseinit;
|
||||
next(ls); /* skip IF or ELSEIF */
|
||||
exp1(ls); /* cond */
|
||||
c = code_U(ls, IFFJMP, 0, -1); /* jump `then' if `cond' is false */
|
||||
c = code_S(ls, IFFJMP, 0, -1); /* jump `then' if `cond' is false */
|
||||
check(ls, THEN);
|
||||
block(ls); /* `then' part */
|
||||
je = code_U(ls, JMP, 0, 0); /* jump `else' part after `then' */
|
||||
je = code_S(ls, JMP, 0, 0); /* jump `else' part after `then' */
|
||||
elseinit = fs->pc;
|
||||
if (ls->token == ELSEIF)
|
||||
ifpart(ls, line);
|
||||
else {
|
||||
|
|
@ -1215,13 +1156,14 @@ static void ifpart (LexState *ls, int line) {
|
|||
block(ls); /* `else' part */
|
||||
check_match(ls, END, IF, line);
|
||||
}
|
||||
if (fs->pc == je+1) { /* `else' part empty? */
|
||||
if (fs->pc > elseinit) /* is there an `else' part? */
|
||||
luaK_fixjump(ls, je, fs->pc); /* last jump jumps over it */
|
||||
else {
|
||||
fs->pc--; /* remove last jump */
|
||||
je--; /* first jump will be smaller */
|
||||
elseinit--; /* first jump will be smaller */
|
||||
LUA_ASSERT(L, fs->pc == je, "jump out of place");
|
||||
}
|
||||
else
|
||||
fix_jump(ls, je, fs->pc); /* fix last jump */
|
||||
fix_jump(ls, c, je+1); /* fix first jump to beginning of `else' part */
|
||||
luaK_fixjump(ls, c, elseinit); /* fix first jump to `else' part */
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -1329,13 +1271,8 @@ static void ret (LexState *ls) {
|
|||
check_debugline(ls);
|
||||
next(ls);
|
||||
explist(ls, &e);
|
||||
if (e.pc > 0) { /* expression is an open function call? */
|
||||
Instruction *i = &ls->fs->f->code[e.pc];
|
||||
*i = SET_OPCODE(*i, TAILCALL); /* instead of a conventional CALL */
|
||||
*i = SETARG_B(*i, ls->fs->nlocalvar);
|
||||
}
|
||||
else
|
||||
code_U(ls, RETCODE, ls->fs->nlocalvar, 0);
|
||||
close_call(ls, e.pc, MULT_RET);
|
||||
code_U(ls, RETCODE, ls->fs->nlocalvar, 0);
|
||||
ls->fs->stacksize = ls->fs->nlocalvar; /* removes all temp values */
|
||||
optional(ls, ';');
|
||||
}
|
||||
|
|
|
|||
74
lparser.h
74
lparser.h
|
|
@ -1,5 +1,5 @@
|
|||
/*
|
||||
** $Id: lparser.h,v 1.4 1999/08/16 20:52:00 roberto Exp roberto $
|
||||
** $Id: lparser.h,v 1.5 1999/11/22 13:12:07 roberto Exp roberto $
|
||||
** LL(1) Parser and code generator for Lua
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
|
@ -8,9 +8,81 @@
|
|||
#define lparser_h
|
||||
|
||||
#include "lobject.h"
|
||||
#include "lopcodes.h"
|
||||
#include "lzio.h"
|
||||
|
||||
|
||||
/* maximum number of local variables */
|
||||
#ifndef MAXLOCALS
|
||||
#define MAXLOCALS 200 /* arbitrary limit (<=MAXARG_B) */
|
||||
#endif
|
||||
|
||||
|
||||
/* maximum number of upvalues */
|
||||
#ifndef MAXUPVALUES
|
||||
#define MAXUPVALUES 32 /* arbitrary limit (<=MAXARG_B) */
|
||||
#endif
|
||||
|
||||
|
||||
/* maximum number of variables in the left side of an assignment */
|
||||
#ifndef MAXVARSLH
|
||||
#define MAXVARSLH 100 /* arbitrary limit (<=MAXARG_B) */
|
||||
#endif
|
||||
|
||||
|
||||
/* maximum number of parameters in a function */
|
||||
#ifndef MAXPARAMS
|
||||
#define MAXPARAMS 100 /* arbitrary limit (<=MAXLOCALS) */
|
||||
#endif
|
||||
|
||||
|
||||
/* maximum stack size in a function */
|
||||
#ifndef MAXSTACK
|
||||
#define MAXSTACK 256 /* arbitrary limit (<=MAXARG_A) */
|
||||
#endif
|
||||
|
||||
|
||||
#if MAXLOCALS>MAXARG_U || MAXUPVALUES>MAXARG_B || MAXVARSLH>MAXARG_B || \
|
||||
MAXPARAMS>MAXLOCALS || MAXSTACK>MAXARG_A || LFIELDS_PER_FLUSH>MAXARG_B
|
||||
#error invalid limits
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** Variable descriptor:
|
||||
** must include an `exp' option because LL(1) cannot distinguish
|
||||
** between variables, upvalues and function calls on first sight.
|
||||
*/
|
||||
typedef enum {
|
||||
VGLOBAL, /* info is constant index of global name */
|
||||
VLOCAL, /* info is stack index */
|
||||
VINDEXED, /* no info (table and index are on the stack) */
|
||||
VEXP /* info is pc index of a call (or 0 if exp is closed) */
|
||||
} varkind;
|
||||
|
||||
typedef struct vardesc {
|
||||
varkind k;
|
||||
int info;
|
||||
} vardesc;
|
||||
|
||||
|
||||
/* state needed to generate code for a given function */
|
||||
typedef struct FuncState {
|
||||
TProtoFunc *f; /* current function header */
|
||||
struct FuncState *prev; /* enclosing function */
|
||||
int pc; /* next position to code */
|
||||
int last_pc; /* last instruction coded (for optimizations) */
|
||||
int stacksize; /* number of values on activation register */
|
||||
int nlocalvar; /* number of active local variables */
|
||||
int nupvalues; /* number of upvalues */
|
||||
int nvars; /* number of entries in f->locvars (-1 if no debug information) */
|
||||
int lastsetline; /* line where last SETLINE was issued */
|
||||
vardesc upvalues[MAXUPVALUES]; /* upvalues */
|
||||
TaggedString *localvar[MAXLOCALS]; /* store local variable names */
|
||||
} FuncState;
|
||||
|
||||
|
||||
TProtoFunc *luaY_parser (lua_State *L, ZIO *z);
|
||||
|
||||
|
||||
|
|
|
|||
20
lvm.c
20
lvm.c
|
|
@ -1,5 +1,5 @@
|
|||
/*
|
||||
** $Id: lvm.c,v 1.86 2000/02/11 16:52:54 roberto Exp roberto $
|
||||
** $Id: lvm.c,v 1.87 2000/02/14 16:51:08 roberto Exp roberto $
|
||||
** Lua virtual machine
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
|
@ -376,12 +376,18 @@ StkId luaV_execute (lua_State *L, const Closure *cl, const TProtoFunc *tf,
|
|||
top++;
|
||||
break;
|
||||
|
||||
case PUSHNUMBER:
|
||||
case PUSHNUM:
|
||||
ttype(top) = LUA_T_NUMBER;
|
||||
nvalue(top) = tf->knum[GETARG_U(i)];
|
||||
top++;
|
||||
break;
|
||||
|
||||
case PUSHNEGNUM:
|
||||
ttype(top) = LUA_T_NUMBER;
|
||||
nvalue(top) = -tf->knum[GETARG_U(i)];
|
||||
top++;
|
||||
break;
|
||||
|
||||
case PUSHUPVALUE:
|
||||
*top++ = cl->consts[GETARG_U(i)+1];
|
||||
break;
|
||||
|
|
@ -524,6 +530,16 @@ StkId luaV_execute (lua_State *L, const Closure *cl, const TProtoFunc *tf,
|
|||
top--;
|
||||
break;
|
||||
|
||||
case ADDI:
|
||||
if (tonumber(top-1)) {
|
||||
ttype(top) = LUA_T_NUMBER;
|
||||
nvalue(top) = (real)GETARG_S(i);
|
||||
call_arith(L, top+1, IM_ADD);
|
||||
}
|
||||
else
|
||||
nvalue(top-1) += (real)GETARG_S(i);
|
||||
break;
|
||||
|
||||
case SUBOP:
|
||||
if (tonumber(top-1) || tonumber(top-2))
|
||||
call_arith(L, top, IM_SUB);
|
||||
|
|
|
|||
57
makefile
57
makefile
|
|
@ -1,5 +1,5 @@
|
|||
#
|
||||
## $Id: makefile,v 1.20 1999/08/17 20:21:52 roberto Exp roberto $
|
||||
## $Id: makefile,v 1.21 1999/10/04 17:51:04 roberto Exp roberto $
|
||||
## Makefile
|
||||
## See Copyright Notice in lua.h
|
||||
#
|
||||
|
|
@ -20,14 +20,17 @@
|
|||
#
|
||||
# define LUA_COMPAT_GC if you need garbage-collect tag methods for tables
|
||||
# (only for compatibility with previous versions)
|
||||
#
|
||||
# define COMPAT_READPATTERN if you need read patterns
|
||||
# (only for compatibility with previous versions)
|
||||
|
||||
CONFIG = -DPOPEN -D_POSIX_SOURCE
|
||||
#CONFIG = -DOLD_ANSI -DDEBUG -DLUA_COMPAT_GC
|
||||
#CONFIG = -DOLD_ANSI -DDEBUG -DLUA_COMPAT_GC -DCOMPAT_READPATTERN
|
||||
|
||||
|
||||
# Compilation parameters
|
||||
CC = gcc
|
||||
CWARNS = -Wall -Wmissing-prototypes -Wshadow -pedantic -Wpointer-arith -Wcast-align -Waggregate-return -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-declarations -Wnested-externs -Werror
|
||||
CWARNS = -Wall -W -Wmissing-prototypes -Wshadow -pedantic -Wpointer-arith -Wcast-align -Waggregate-return -Wwrite-strings -Wcast-qual -Wnested-externs
|
||||
CFLAGS = $(CONFIG) $(CWARNS) -ansi -O2
|
||||
|
||||
|
||||
|
|
@ -45,6 +48,7 @@ LUAOBJS = \
|
|||
lauxlib.o \
|
||||
lbuffer.o \
|
||||
lbuiltin.o \
|
||||
ldebug.o \
|
||||
ldo.o \
|
||||
lfunc.o \
|
||||
lgc.o \
|
||||
|
|
@ -52,6 +56,7 @@ LUAOBJS = \
|
|||
lmem.o \
|
||||
lobject.o \
|
||||
lparser.o \
|
||||
lcode.o \
|
||||
lref.o \
|
||||
lstate.o \
|
||||
lstring.o \
|
||||
|
|
@ -59,7 +64,8 @@ LUAOBJS = \
|
|||
ltm.o \
|
||||
lvm.o \
|
||||
lundump.o \
|
||||
lzio.o
|
||||
lzio.o \
|
||||
ltests.o
|
||||
|
||||
LIBOBJS = \
|
||||
liolib.o \
|
||||
|
|
@ -86,9 +92,7 @@ liblua.so.1.0 : lua.o
|
|||
|
||||
clear :
|
||||
rcsclean
|
||||
rm -f *.o
|
||||
rm -f
|
||||
co $(CO_OPTIONS) lua.h lualib.h luadebug.h
|
||||
rm -f *.o *.a
|
||||
|
||||
|
||||
%.h : RCS/%.h,v
|
||||
|
|
@ -98,42 +102,47 @@ clear :
|
|||
co $(CO_OPTIONS) $@
|
||||
|
||||
|
||||
lapi.o: lapi.c lapi.h lua.h lobject.h lauxlib.h ldo.h lstate.h \
|
||||
lapi.o: lapi.c lapi.h lobject.h lua.h lauxlib.h ldo.h lstate.h \
|
||||
luadebug.h lfunc.h lgc.h lmem.h lref.h lstring.h ltable.h ltm.h lvm.h
|
||||
lauxlib.o: lauxlib.c lauxlib.h lua.h luadebug.h
|
||||
lbuffer.o: lbuffer.c lauxlib.h lua.h lmem.h lstate.h lobject.h \
|
||||
luadebug.h
|
||||
lbuiltin.o: lbuiltin.c lapi.h lua.h lobject.h lauxlib.h lbuiltin.h \
|
||||
lbuiltin.o: lbuiltin.c lapi.h lobject.h lua.h lauxlib.h lbuiltin.h \
|
||||
ldo.h lstate.h luadebug.h lfunc.h lmem.h lstring.h ltable.h ltm.h \
|
||||
lundump.h lzio.h lvm.h
|
||||
lcode.o: lcode.c lcode.h llex.h lobject.h lua.h lzio.h lmem.h \
|
||||
lopcodes.h lparser.h
|
||||
ldblib.o: ldblib.c lauxlib.h lua.h luadebug.h lualib.h
|
||||
ldo.o: ldo.c lauxlib.h lua.h ldo.h lobject.h lstate.h luadebug.h lgc.h \
|
||||
lmem.h lparser.h lzio.h lstring.h ltm.h lundump.h lvm.h
|
||||
ldebug.o: ldebug.c lapi.h lobject.h lua.h lauxlib.h ldebug.h \
|
||||
luadebug.h ldo.h lstate.h lfunc.h ltable.h ltm.h
|
||||
ldo.o: ldo.c lauxlib.h lua.h ldebug.h lobject.h luadebug.h ldo.h \
|
||||
lstate.h lgc.h lmem.h lparser.h lopcodes.h lzio.h lstring.h ltm.h \
|
||||
lundump.h lvm.h
|
||||
lfunc.o: lfunc.c lfunc.h lobject.h lua.h lmem.h lstate.h luadebug.h
|
||||
lgc.o: lgc.c ldo.h lobject.h lua.h lstate.h luadebug.h lfunc.h lgc.h \
|
||||
lref.h lstring.h ltable.h ltm.h
|
||||
lmem.h lref.h lstring.h ltable.h ltm.h
|
||||
linit.o: linit.c lua.h lualib.h
|
||||
liolib.o: liolib.c lauxlib.h lua.h luadebug.h lualib.h
|
||||
llex.o: llex.c lauxlib.h lua.h llex.h lobject.h lzio.h lmem.h \
|
||||
lparser.h lstate.h luadebug.h lstring.h
|
||||
lparser.h lopcodes.h lstate.h luadebug.h lstring.h
|
||||
lmathlib.o: lmathlib.c lauxlib.h lua.h lualib.h
|
||||
lmem.o: lmem.c lmem.h lstate.h lobject.h lua.h luadebug.h
|
||||
lmem.o: lmem.c lmem.h lua.h lobject.h lstate.h luadebug.h
|
||||
lobject.o: lobject.c lobject.h lua.h
|
||||
lparser.o: lparser.c ldo.h lobject.h lua.h lstate.h luadebug.h lfunc.h \
|
||||
llex.h lzio.h lmem.h lopcodes.h lparser.h lstring.h
|
||||
lref.o: lref.c lmem.h lref.h lobject.h lua.h lstate.h luadebug.h
|
||||
lstate.o: lstate.c lbuiltin.h ldo.h lobject.h lua.h lstate.h \
|
||||
luadebug.h lgc.h llex.h lzio.h lmem.h lstring.h ltm.h
|
||||
lstring.o: lstring.c lmem.h lobject.h lua.h lstate.h luadebug.h \
|
||||
lparser.o: lparser.c lcode.h llex.h lobject.h lua.h lzio.h ldo.h \
|
||||
lstate.h luadebug.h lfunc.h lmem.h lopcodes.h lparser.h lstring.h
|
||||
lref.o: lref.c lapi.h lobject.h lua.h lmem.h lref.h lstate.h \
|
||||
luadebug.h
|
||||
lstate.o: lstate.c lauxlib.h lua.h lbuiltin.h ldo.h lobject.h lstate.h \
|
||||
luadebug.h lgc.h llex.h lzio.h lmem.h lref.h lstring.h ltm.h
|
||||
lstring.o: lstring.c lmem.h lua.h lobject.h lstate.h luadebug.h \
|
||||
lstring.h
|
||||
lstrlib.o: lstrlib.c lauxlib.h lua.h lualib.h
|
||||
ltable.o: ltable.c lauxlib.h lua.h lmem.h lobject.h lstate.h \
|
||||
luadebug.h ltable.h
|
||||
ltm.o: ltm.c lauxlib.h lua.h lmem.h lobject.h lstate.h luadebug.h \
|
||||
ltm.h
|
||||
lua.o: lua.c lua.h luadebug.h lualib.h
|
||||
lundump.o: lundump.c lauxlib.h lua.h lfunc.h lobject.h lmem.h \
|
||||
lopcodes.h lstring.h lundump.h lzio.h
|
||||
lvm.o: lvm.c lauxlib.h lua.h ldo.h lobject.h lstate.h luadebug.h \
|
||||
lfunc.h lgc.h lopcodes.h lstring.h ltable.h ltm.h lvm.h
|
||||
lopcodes.h lstring.h lstate.h luadebug.h lundump.h lzio.h
|
||||
lvm.o: lvm.c lauxlib.h lua.h ldebug.h lobject.h luadebug.h ldo.h \
|
||||
lstate.h lfunc.h lgc.h lopcodes.h lstring.h ltable.h ltm.h lvm.h
|
||||
lzio.o: lzio.c lzio.h
|
||||
|
|
|
|||
Loading…
Reference in a new issue