luac.c
上传用户:yisoukefu
上传日期:2020-08-09
资源大小:39506k
文件大小:4k
- /*
- ** $Id: luac.c,v 1.52 2005/11/11 14:03:13 lhf Exp $
- ** Lua compiler (saves bytecodes to files; also list bytecodes)
- ** See Copyright Notice in lua.h
- */
- #include <errno.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #define luac_c
- #define LUA_CORE
- #include "lua.h"
- #include "lauxlib.h"
- #include "ldo.h"
- #include "lfunc.h"
- #include "lmem.h"
- #include "lobject.h"
- #include "lopcodes.h"
- #include "lstring.h"
- #include "lundump.h"
- #define PROGNAME "luac" /* default program name */
- #define OUTPUT PROGNAME ".out" /* default output file */
- static int listing=0; /* list bytecodes? */
- static int dumping=1; /* dump bytecodes? */
- static int stripping=0; /* strip debug information? */
- static char Output[]={ OUTPUT }; /* default output file name */
- static const char* output=Output; /* actual output file name */
- static const char* progname=PROGNAME; /* actual program name */
- static void fatal(const char* message)
- {
- fprintf(stderr,"%s: %sn",progname,message);
- exit(EXIT_FAILURE);
- }
- static void cannot(const char* what)
- {
- fprintf(stderr,"%s: cannot %s %s: %sn",progname,what,output,strerror(errno));
- exit(EXIT_FAILURE);
- }
- static void usage(const char* message)
- {
- if (*message=='-')
- fprintf(stderr,"%s: unrecognized option " LUA_QS "n",progname,message);
- else
- fprintf(stderr,"%s: %sn",progname,message);
- fprintf(stderr,
- "usage: %s [options] [filenames].n"
- "Available options are:n"
- " - process stdinn"
- " -l listn"
- " -o name output to file " LUA_QL("name") " (default is "%s")n"
- " -p parse onlyn"
- " -s strip debug informationn"
- " -v show version informationn"
- " -- stop handling optionsn",
- progname,Output);
- exit(EXIT_FAILURE);
- }
- #define IS(s) (strcmp(argv[i],s)==0)
- static int doargs(int argc, char* argv[])
- {
- int i;
- if (argv[0]!=NULL && *argv[0]!=0) progname=argv[0];
- for (i=1; i<argc; i++)
- {
- if (*argv[i]!='-') /* end of options; keep it */
- break;
- else if (IS("--")) /* end of options; skip it */
- {
- ++i;
- break;
- }
- else if (IS("-")) /* end of options; use stdin */
- break;
- else if (IS("-l")) /* list */
- ++listing;
- else if (IS("-o")) /* output file */
- {
- output=argv[++i];
- if (output==NULL || *output==0) usage(LUA_QL("-o") " needs argument");
- if (IS("-")) output=NULL;
- }
- else if (IS("-p")) /* parse only */
- dumping=0;
- else if (IS("-s")) /* strip debug information */
- stripping=1;
- else if (IS("-v")) /* show version */
- {
- printf("%s %sn",LUA_VERSION,LUA_COPYRIGHT);
- if (argc==2) exit(EXIT_SUCCESS);
- }
- else /* unknown option */
- usage(argv[i]);
- }
- if (i==argc && (listing || !dumping))
- {
- dumping=0;
- argv[--i]=Output;
- }
- return i;
- }
- #define toproto(L,i) (clvalue(L->top+(i))->l.p)
- static Proto* combine(lua_State* L, int n)
- {
- if (n==1)
- return toproto(L,-1);
- else
- {
- int i,pc;
- Proto* f=luaF_newproto(L);
- setptvalue2s(L,L->top,f); incr_top(L);
- f->source=luaS_newliteral(L,"=(" PROGNAME ")");
- f->maxstacksize=1;
- pc=2*n+1;
- f->code=luaM_newvector(L,pc,Instruction);
- f->sizecode=pc;
- f->p=luaM_newvector(L,n,Proto*);
- f->sizep=n;
- pc=0;
- for (i=0; i<n; i++)
- {
- f->p[i]=toproto(L,i-n-1);
- f->code[pc++]=CREATE_ABx(OP_CLOSURE,0,i);
- f->code[pc++]=CREATE_ABC(OP_CALL,0,1,1);
- }
- f->code[pc++]=CREATE_ABC(OP_RETURN,0,1,0);
- return f;
- }
- }
- static int writer(lua_State* L, const void* p, size_t size, void* u)
- {
- UNUSED(L);
- return (fwrite(p,size,1,(FILE*)u)!=1) && (size!=0);
- }
- struct Smain {
- int argc;
- char** argv;
- };
- static int pmain(lua_State* L)
- {
- struct Smain* s = (struct Smain*)lua_touserdata(L, 1);
- int argc=s->argc;
- char** argv=s->argv;
- Proto* f;
- int i;
- if (!lua_checkstack(L,argc)) fatal("too many input files");
- for (i=0; i<argc; i++)
- {
- const char* filename=IS("-") ? NULL : argv[i];
- if (luaL_loadfile(L,filename)!=0) fatal(lua_tostring(L,-1));
- }
- f=combine(L,argc);
- if (listing) luaU_print(f,listing>1);
- if (dumping)
- {
- FILE* D= (output==NULL) ? stdout : fopen(output,"wb");
- if (D==NULL) cannot("open");
- lua_lock(L);
- luaU_dump(L,f,writer,D,stripping);
- lua_unlock(L);
- if (ferror(D)) cannot("write");
- if (fclose(D)) cannot("close");
- }
- return 0;
- }
- int main(int argc, char* argv[])
- {
- lua_State* L;
- struct Smain s;
- int i=doargs(argc,argv);
- argc-=i; argv+=i;
- if (argc<=0) usage("no input files given");
- L=lua_open();
- if (L==NULL) fatal("not enough memory for state");
- s.argc=argc;
- s.argv=argv;
- if (lua_cpcall(L,pmain,&s)!=0) fatal(lua_tostring(L,-1));
- lua_close(L);
- return EXIT_SUCCESS;
- }