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synced 2025-01-14 05:43:00 +08:00
new version by lhf.
This commit is contained in:
Roberto Ierusalimschy
parent
e0ff4e5d22
commit
7c9aee64c2
108
lundump.c
108
lundump.c
@ -1,13 +1,15 @@
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/*
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** $Id: lundump.c,v 1.6 1998/12/27 20:23:22 roberto Exp roberto $
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** $Id: lundump.c,v 1.17 1999/03/29 16:16:18 lhf Exp $
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** load bytecodes from files
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** See Copyright Notice in lua.h
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*/
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#include <stdio.h>
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#include <string.h>
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#include "lauxlib.h"
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#include "lfunc.h"
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#include "lmem.h"
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#include "lopcodes.h"
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#include "lstring.h"
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#include "lundump.h"
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@ -52,19 +54,18 @@ static unsigned long LoadLong (ZIO* Z)
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return (hi<<16)|lo;
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}
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#if ID_NUMBER==ID_REAL4
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/* LUA_NUMBER */
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#if ID_NUMBER==ID_REAL4 /* LUA_NUMBER */
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/* assumes sizeof(long)==4 and sizeof(float)==4 (IEEE) */
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static float LoadFloat (ZIO* Z)
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{
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unsigned long l=LoadLong(Z);
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float f=*(float*)&l;
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float f;
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memcpy(&f,&l,sizeof(f));
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return f;
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}
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#endif
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#if ID_NUMBER==ID_REAL8
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/* LUA_NUMBER */
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#if ID_NUMBER==ID_REAL8 /* LUA_NUMBER */
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/* assumes sizeof(long)==4 and sizeof(double)==8 (IEEE) */
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static double LoadDouble (ZIO* Z)
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{
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@ -81,25 +82,34 @@ static double LoadDouble (ZIO* Z)
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l[0]=LoadLong(Z);
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l[1]=LoadLong(Z);
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}
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f=*(double*)l;
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memcpy(&f,l,sizeof(f));
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return f;
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}
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#endif
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static int LoadInt (ZIO* Z, char* message)
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{
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unsigned long l=LoadLong(Z);
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unsigned int i=l;
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if (i!=l) luaL_verror(message,l,zname(Z));
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return i;
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}
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#define PAD 5 /* two word operands plus opcode */
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static Byte* LoadCode (ZIO* Z)
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{
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unsigned long size=LoadLong(Z);
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unsigned int s=size;
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void* b;
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if (s!=size) luaL_verror("code too long (%ld bytes) in %s",size,zname(Z));
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b=luaM_malloc(size);
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int size=LoadInt(Z,"code too long (%ld bytes) in %s");
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Byte* b=luaM_malloc(size+PAD);
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LoadBlock(b,size,Z);
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if (b[size-1]!=ENDCODE) luaL_verror("bad code in %s",zname(Z));
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memset(b+size,ENDCODE,PAD); /* pad for safety */
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return b;
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}
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static TaggedString* LoadTString (ZIO* Z)
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{
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int size=LoadWord(Z);
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long size=LoadLong(Z);
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if (size==0)
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return NULL;
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else
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@ -112,46 +122,45 @@ static TaggedString* LoadTString (ZIO* Z)
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static void LoadLocals (TProtoFunc* tf, ZIO* Z)
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{
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int i,n=LoadWord(Z);
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int i,n=LoadInt(Z,"too many locals (%ld) in %s");
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if (n==0) return;
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tf->locvars=luaM_newvector(n+1,LocVar);
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for (i=0; i<n; i++)
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{
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tf->locvars[i].line=LoadWord(Z);
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tf->locvars[i].line=LoadInt(Z,"too many lines (%ld) in %s");
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tf->locvars[i].varname=LoadTString(Z);
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}
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tf->locvars[i].line=-1; /* flag end of vector */
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tf->locvars[i].varname=NULL;
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}
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static TProtoFunc* LoadFunction (ZIO* Z);
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static TProtoFunc* LoadFunction(ZIO* Z);
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static void LoadConstants (TProtoFunc* tf, ZIO* Z)
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{
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int i,n=LoadWord(Z);
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int i,n=LoadInt(Z,"too many constants (%ld) in %s");
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tf->nconsts=n;
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if (n==0) return;
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tf->consts=luaM_newvector(n,TObject);
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for (i=0; i<n; i++)
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{
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TObject* o=tf->consts+i;
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int c=ezgetc(Z);
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switch (c)
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ttype(o)=-ezgetc(Z); /* ttype(o) is negative - ORDER LUA_T */
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switch (ttype(o))
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{
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case ID_NUM:
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ttype(o)=LUA_T_NUMBER;
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case LUA_T_NUMBER:
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doLoadNumber(nvalue(o),Z);
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break;
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case ID_STR:
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ttype(o)=LUA_T_STRING;
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case LUA_T_STRING:
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tsvalue(o)=LoadTString(Z);
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break;
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case ID_FUN:
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ttype(o)=LUA_T_PROTO;
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case LUA_T_PROTO:
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tfvalue(o)=LoadFunction(Z);
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break;
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default:
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luaL_verror("bad constant #%d in %s: type=%d ('%c')",i,zname(Z),c,c);
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case LUA_T_NIL:
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break;
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default: /* cannot happen */
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luaU_badconstant("load",i,o,tf);
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break;
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}
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}
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@ -160,8 +169,9 @@ static void LoadConstants (TProtoFunc* tf, ZIO* Z)
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static TProtoFunc* LoadFunction (ZIO* Z)
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{
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TProtoFunc* tf=luaF_newproto();
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tf->lineDefined=LoadWord(Z);
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tf->lineDefined=LoadInt(Z,"lineDefined too large (%ld) in %s");
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tf->source=LoadTString(Z);
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if (tf->source==NULL) tf->source=luaS_new(zname(Z));
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tf->code=LoadCode(Z);
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LoadLocals(tf,Z);
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LoadConstants(tf,Z);
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@ -180,6 +190,7 @@ static void LoadHeader (ZIO* Z)
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{
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int version,id,sizeofR;
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real f=-TEST_NUMBER,tf=TEST_NUMBER;
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luaU_testnumber();
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LoadSignature(Z);
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version=ezgetc(Z);
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if (version>VERSION)
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@ -193,15 +204,14 @@ static void LoadHeader (ZIO* Z)
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id=ezgetc(Z); /* test number representation */
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sizeofR=ezgetc(Z);
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if (id!=ID_NUMBER || sizeofR!=sizeof(real))
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{
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luaL_verror("unknown number signature in %s: "
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"read 0x%02x%02x; expected 0x%02x%02x",
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zname(Z),id,sizeofR,ID_NUMBER,sizeof(real));
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}
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doLoadNumber(f,Z);
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if (f!=tf)
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luaL_verror("unknown number representation in %s: read %g; expected %g",
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zname(Z),(double)f,(double)tf); /* LUA_NUMBER */
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luaL_verror("unknown number representation in %s: "
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"read " NUMBER_FMT "; expected " NUMBER_FMT,
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zname(Z),f,tf);
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}
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static TProtoFunc* LoadChunk (ZIO* Z)
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@ -214,7 +224,7 @@ static TProtoFunc* LoadChunk (ZIO* Z)
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** load one chunk from a file or buffer
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** return main if ok and NULL at EOF
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*/
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TProtoFunc* luaU_undump1 (ZIO* Z)
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TProtoFunc* luaU_undump1(ZIO* Z)
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{
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int c=zgetc(Z);
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if (c==ID_CHUNK)
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@ -223,3 +233,35 @@ TProtoFunc* luaU_undump1 (ZIO* Z)
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luaL_verror("%s is not a Lua binary file",zname(Z));
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return NULL;
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}
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/*
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** test number representation
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*/
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void luaU_testnumber(void)
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{
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if (sizeof(real)!=SIZEOF_NUMBER)
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luaL_verror("numbers have %d bytes; expected %d. see lundump.h",
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(int)sizeof(real),SIZEOF_NUMBER);
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#if ID_NUMBER==ID_REAL4 || ID_NUMBER==ID_REAL8
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if (sizeof(long)!=4)
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luaL_verror("longs have %d bytes; expected %d. see lundump.h",
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(int)sizeof(long),4);
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#endif
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{
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real t=TEST_NUMBER;
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TYPEOF_NUMBER v=TEST_NUMBER;
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if (t!=v)
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luaL_verror("unsupported number type; expected %d-byte " NAMEOF_NUMBER "."
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" see config and lundump.h",SIZEOF_NUMBER);
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}
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}
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/*
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* handle constants that cannot happen
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*/
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void luaU_badconstant(char* s, int i, TObject* o, TProtoFunc* tf)
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{
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int t=ttype(o);
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char* name= (t>0 || t<LUA_T_LINE) ? "?" : luaO_typenames[-t];
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luaL_verror("cannot %s constant #%d: type=%d [%s]" IN,s,i,t,name,INLOC);
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}
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96
lundump.h
96
lundump.h
@ -1,5 +1,5 @@
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/*
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** $Id: lundump.h,v 1.4 1998/06/25 16:48:44 roberto Exp roberto $
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** $Id: lundump.h,v 1.13 1999/03/29 16:16:18 lhf Exp $
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** load pre-compiled Lua chunks
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** See Copyright Notice in lua.h
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*/
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@ -10,18 +10,47 @@
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#include "lobject.h"
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#include "lzio.h"
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TProtoFunc *luaU_undump1 (ZIO* Z); /* load one chunk */
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/* -- start of user configuration ------------------------------------------ */
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#define SIGNATURE "Lua"
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#define VERSION 0x31 /* last format change was in 3.1 */
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#define VERSION0 0x31 /* last major change was in 3.1 */
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/* LUA_NUMBER
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* choose below the number representation in precompiled chunks by choosing an
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* an adequate definition for ID_NUMBER.
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* if you change LUA_NUM_TYPE, you must set ID_NUMBER accordingly.
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* the default is ID_REAL8 because the default for LUA_NUM_TYPE is double.
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* if you want to use this default, do nothing.
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* if your machine does not use the IEEE 754 floating-point standard, use
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* ID_NATIVE, but precompiled chunks may not be portable to all architectures.
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*
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* for types other than the ones listed below, you'll have to write your own
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* dump and undump routines, specially if sizeof(long)!=4.
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*/
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#define IsMain(f) (f->lineDefined==0)
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/* choose one definition for ID_NUMBER and move it to after #endif */
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#if 0
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#define ID_NUMBER ID_INT4 /* 4-byte integers */
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#define ID_NUMBER ID_REAL4 /* 4-byte reals */
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#define ID_NUMBER ID_REAL8 /* 8-byte reals */
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#define ID_NUMBER ID_NATIVE /* whatever your machine uses */
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#endif
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#define ID_CHUNK 27 /* ESC */
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#define ID_NUM 'N'
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#define ID_STR 'S'
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#define ID_FUN 'F'
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/* format for numbers in listings and error messages */
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#ifndef NUMBER_FMT
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#define NUMBER_FMT "%.16g" /* LUA_NUMBER */
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#endif
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/* -- end of user configuration -- DO NOT CHANGE ANYTHING BELOW THIS LINE -- */
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TProtoFunc* luaU_undump1(ZIO* Z); /* load one chunk */
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void luaU_testnumber(void); /* test number representation */
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void luaU_badconstant(char* s, int i, TObject* o, TProtoFunc* tf);
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/* handle cases that cannot happen */
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/* definitions for headers of binary files */
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#define VERSION 0x32 /* last format change was in 3.2 */
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#define VERSION0 0x32 /* last major change was in 3.2 */
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#define ID_CHUNK 27 /* binary files start with ESC... */
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#define SIGNATURE "Lua" /* ...followed by this signature */
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/* number representation */
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#define ID_INT4 'l' /* 4-byte integers */
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@ -29,53 +58,46 @@ TProtoFunc *luaU_undump1 (ZIO* Z); /* load one chunk */
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#define ID_REAL8 'd' /* 8-byte reals */
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#define ID_NATIVE '?' /* whatever your machine uses */
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/*
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* use a multiple of PI for testing number representation.
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* multiplying by 1E8 gives notrivial integer values.
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*/
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#define TEST_NUMBER 3.14159265358979323846E8
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/* LUA_NUMBER
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* choose one below for the number representation in precompiled chunks.
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* the default is ID_REAL8 because the default for LUA_NUM_TYPE is double.
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* if your machine does not use IEEE 754, use ID_NATIVE.
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* the next version will support conversion to/from IEEE 754.
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*
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* if you change LUA_NUM_TYPE, make sure you set ID_NUMBER accordingly,
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* specially if sizeof(long)!=4.
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* for types other than the ones listed below, you'll have to write your own
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* dump and undump routines.
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*/
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/* the default is ID_REAL8 because the default for LUA_NUM_TYPE is double */
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#ifndef ID_NUMBER
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#define ID_NUMBER ID_NATIVE
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#define ID_NUMBER ID_REAL8 /* 8-byte reals */
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#endif
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#if 0
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#define ID_NUMBER ID_INT4
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#define ID_NUMBER ID_REAL4
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#define ID_NUMBER ID_REAL8
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#define ID_NUMBER ID_NATIVE
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#endif
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#endif
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/* a multiple of PI for testing number representation */
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/* multiplying by 1E8 gives non-trivial integer values */
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#define TEST_NUMBER 3.14159265358979323846E8
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#if ID_NUMBER==ID_REAL4
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#define DumpNumber DumpFloat
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#define LoadNumber LoadFloat
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#define SIZEOF_NUMBER 4
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#define TYPEOF_NUMBER float
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#define NAMEOF_NUMBER "float"
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#elif ID_NUMBER==ID_REAL8
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#define DumpNumber DumpDouble
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#define LoadNumber LoadDouble
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#define SIZEOF_NUMBER 8
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#define TYPEOF_NUMBER double
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#define NAMEOF_NUMBER "double"
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#elif ID_NUMBER==ID_INT4
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#define DumpNumber DumpLong
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#define LoadNumber LoadLong
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#define SIZEOF_NUMBER 4
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#define TYPEOF_NUMBER long
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#define NAMEOF_NUMBER "long"
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#elif ID_NUMBER==ID_NATIVE
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#define DumpNumber DumpNative
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#define LoadNumber LoadNative
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#define SIZEOF_NUMBER sizeof(real)
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#define TYPEOF_NUMBER real
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#define NAMEOF_NUMBER "native"
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#else
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#error bad ID_NUMBER
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#endif
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/* formats for error messages */
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#define SOURCE "<%s:%d>"
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#define IN " in %p " SOURCE
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#define INLOC tf,tf->source->str,tf->lineDefined
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#endif
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