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-rw-r--r--src/lundump.js155
1 files changed, 73 insertions, 82 deletions
diff --git a/src/lundump.js b/src/lundump.js
index 2213015..d288d9c 100644
--- a/src/lundump.js
+++ b/src/lundump.js
@@ -79,38 +79,38 @@ class BytecodeParser {
return u8;
}
- readByte() {
+ LoadByte() {
if (luaZ_read(this.Z, this.u8, 0, 1) !== 0)
this.error("truncated");
return this.u8[0];
}
- readInteger() {
- if (luaZ_read(this.Z, this.u8, 0, this.integerSize) !== 0)
+ LoadInt() {
+ if (luaZ_read(this.Z, this.u8, 0, this.intSize) !== 0)
this.error("truncated");
return this.dv.getInt32(0, true);
}
- readSize_t() {
- return this.readInteger();
+ LoadNumber() {
+ if (luaZ_read(this.Z, this.u8, 0, this.numberSize) !== 0)
+ this.error("truncated");
+ return this.dv.getFloat64(0, true);
}
- readInt() {
- if (luaZ_read(this.Z, this.u8, 0, this.intSize) !== 0)
+ LoadInteger() {
+ if (luaZ_read(this.Z, this.u8, 0, this.integerSize) !== 0)
this.error("truncated");
return this.dv.getInt32(0, true);
}
- readNumber() {
- if (luaZ_read(this.Z, this.u8, 0, this.numberSize) !== 0)
- this.error("truncated");
- return this.dv.getFloat64(0, true);
+ LoadSize_t() {
+ return this.LoadInteger();
}
- readString() {
- let size = this.readByte();
+ LoadString() {
+ let size = this.LoadByte();
if (size === 0xFF)
- size = this.readSize_t();
+ size = this.LoadSize_t();
if (size === 0)
return null;
return luaS_bless(this.L, this.read(size-1));
@@ -121,23 +121,14 @@ class BytecodeParser {
return ((~((~0)<<(n)))<<(p));
}
- /* creates a mask with 'n' 0 bits at position 'p' */
- static MASK0(n, p) {
- return (~BytecodeParser.MASK1(n,p));
- }
-
- readInstruction() {
- if (luaZ_read(this.Z, this.u8, 0, this.instructionSize) !== 0)
- this.error("truncated");
- return this.dv.getUint32(0, true);
- }
-
- readCode(f) {
- let n = this.readInt();
+ LoadCode(f) {
+ let n = this.LoadInt();
let p = BytecodeParser;
for (let i = 0; i < n; i++) {
- let ins = this.readInstruction();
+ if (luaZ_read(this.Z, this.u8, 0, this.instructionSize) !== 0)
+ this.error("truncated");
+ let ins = this.dv.getUint32(0, true);
f.code[i] = {
code: ins,
opcode: (ins >> POS_OP) & p.MASK1(SIZE_OP, 0),
@@ -151,40 +142,28 @@ class BytecodeParser {
}
}
- readUpvalues(f) {
- let n = this.readInt();
+ LoadConstants(f) {
+ let n = this.LoadInt();
for (let i = 0; i < n; i++) {
- f.upvalues[i] = {
- name: null,
- instack: this.readByte(),
- idx: this.readByte()
- };
- }
- }
-
- readConstants(f) {
- let n = this.readInt();
-
- for (let i = 0; i < n; i++) {
- let t = this.readByte();
+ let t = this.LoadByte();
switch (t) {
case LUA_TNIL:
f.k.push(new lobject.TValue(LUA_TNIL, null));
break;
case LUA_TBOOLEAN:
- f.k.push(new lobject.TValue(LUA_TBOOLEAN, this.readByte() !== 0));
+ f.k.push(new lobject.TValue(LUA_TBOOLEAN, this.LoadByte() !== 0));
break;
case LUA_TNUMFLT:
- f.k.push(new lobject.TValue(LUA_TNUMFLT, this.readNumber()));
+ f.k.push(new lobject.TValue(LUA_TNUMFLT, this.LoadNumber()));
break;
case LUA_TNUMINT:
- f.k.push(new lobject.TValue(LUA_TNUMINT, this.readInteger()));
+ f.k.push(new lobject.TValue(LUA_TNUMINT, this.LoadInteger()));
break;
case LUA_TSHRSTR:
case LUA_TLNGSTR:
- f.k.push(new lobject.TValue(LUA_TLNGSTR, this.readString()));
+ f.k.push(new lobject.TValue(LUA_TLNGSTR, this.LoadString()));
break;
default:
this.error(`unrecognized constant '${t}'`);
@@ -192,49 +171,61 @@ class BytecodeParser {
}
}
- readProtos(f) {
- let n = this.readInt();
+ LoadProtos(f) {
+ let n = this.LoadInt();
for (let i = 0; i < n; i++) {
f.p[i] = new lfunc.Proto(this.L);
- this.readFunction(f.p[i], f.source);
+ this.LoadFunction(f.p[i], f.source);
+ }
+ }
+
+ LoadUpvalues(f) {
+ let n = this.LoadInt();
+
+ for (let i = 0; i < n; i++) {
+ f.upvalues[i] = {
+ name: null,
+ instack: this.LoadByte(),
+ idx: this.LoadByte()
+ };
}
}
- readDebug(f) {
- let n = this.readInt();
+ LoadDebug(f) {
+ let n = this.LoadInt();
for (let i = 0; i < n; i++)
- f.lineinfo[i] = this.readInt();
+ f.lineinfo[i] = this.LoadInt();
- n = this.readInt();
+ n = this.LoadInt();
for (let i = 0; i < n; i++) {
f.locvars[i] = {
- varname: this.readString(),
- startpc: this.readInt(),
- endpc: this.readInt()
+ varname: this.LoadString(),
+ startpc: this.LoadInt(),
+ endpc: this.LoadInt()
};
}
- n = this.readInt();
+ n = this.LoadInt();
for (let i = 0; i < n; i++) {
- f.upvalues[i].name = this.readString();
+ f.upvalues[i].name = this.LoadString();
}
}
- readFunction(f, psource) {
- f.source = this.readString();
+ LoadFunction(f, psource) {
+ f.source = this.LoadString();
if (f.source === null) /* no source in dump? */
f.source = psource; /* reuse parent's source */
- f.linedefined = this.readInt();
- f.lastlinedefined = this.readInt();
- f.numparams = this.readByte();
- f.is_vararg = this.readByte() !== 0;
- f.maxstacksize = this.readByte();
- this.readCode(f);
- this.readConstants(f);
- this.readUpvalues(f);
- this.readProtos(f);
- this.readDebug(f);
+ f.linedefined = this.LoadInt();
+ f.lastlinedefined = this.LoadInt();
+ f.numparams = this.LoadByte();
+ f.is_vararg = this.LoadByte() !== 0;
+ f.maxstacksize = this.LoadByte();
+ this.LoadCode(f);
+ this.LoadConstants(f);
+ this.LoadUpvalues(f);
+ this.LoadProtos(f);
+ this.LoadDebug(f);
}
checkliteral(s, msg) {
@@ -246,19 +237,19 @@ class BytecodeParser {
checkHeader() {
this.checkliteral(LUA_SIGNATURE.subarray(1), "not a"); /* 1st char already checked */
- if (this.readByte() !== 0x53)
+ if (this.LoadByte() !== 0x53)
this.error("version mismatch in");
- if (this.readByte() !== 0)
+ if (this.LoadByte() !== 0)
this.error("format mismatch in");
this.checkliteral(LUAC_DATA, "corrupted");
- this.intSize = this.readByte();
- this.size_tSize = this.readByte();
- this.instructionSize = this.readByte();
- this.integerSize = this.readByte();
- this.numberSize = this.readByte();
+ this.intSize = this.LoadByte();
+ this.size_tSize = this.LoadByte();
+ this.instructionSize = this.LoadByte();
+ this.integerSize = this.LoadByte();
+ this.numberSize = this.LoadByte();
this.checksize(this.intSize, 4, "int");
this.checksize(this.size_tSize, 4, "size_t");
@@ -266,10 +257,10 @@ class BytecodeParser {
this.checksize(this.integerSize, 4, "integer");
this.checksize(this.numberSize, 8, "number");
- if (this.readInteger() !== 0x5678)
+ if (this.LoadInteger() !== 0x5678)
this.error("endianness mismatch in");
- if (this.readNumber() !== 370.5)
+ if (this.LoadNumber() !== 370.5)
this.error("float format mismatch in");
}
@@ -288,11 +279,11 @@ class BytecodeParser {
const luaU_undump = function(L, Z, name) {
let S = new BytecodeParser(L, Z, name);
S.checkHeader();
- let cl = lfunc.luaF_newLclosure(L, S.readByte());
+ let cl = lfunc.luaF_newLclosure(L, S.LoadByte());
ldo.luaD_inctop(L);
L.stack[L.top-1].setclLvalue(cl);
cl.p = new lfunc.Proto(L);
- S.readFunction(cl.p, null);
+ S.LoadFunction(cl.p, null);
lua_assert(cl.nupvalues === cl.p.upvalues.length);
/* luai_verifycode */
return cl;
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-11-23 09:31:42 +0000