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authordaurnimator <quae@daurnimator.com>2017-05-15 17:20:06 +1000
committerdaurnimator <quae@daurnimator.com>2017-05-15 17:20:06 +1000
commitf7e5203a20ef41cf9bc59d339b4f85007a7f3764 (patch)
tree3c6f0907231588f528902eec3b2b1d09d19a53e1 /src/lundump.js
parent3947c2cb2fa6193645ac30898064e3d335a63545 (diff)
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Separate ZIO and MBuffer data structures
- lua_load no longer takes a null reader function
Diffstat (limited to 'src/lundump.js')
-rw-r--r--src/lundump.js62
1 files changed, 27 insertions, 35 deletions
diff --git a/src/lundump.js b/src/lundump.js
index eeb77f4..1891451 100644
--- a/src/lundump.js
+++ b/src/lundump.js
@@ -9,20 +9,20 @@ const lfunc = require('./lfunc.js');
const lobject = require('./lobject.js');
const lopcodes = require('./lopcodes.js');
const lstring = require('./lstring.js');
-const llex = require('./llex.js');
+const lzio = require('./lzio.js');
let LUAC_DATA = [0x19, 0x93, defs.char["\r"], defs.char["\n"], 0x1a, defs.char["\n"]];
class BytecodeParser {
- constructor(L, buffer, name) {
+ constructor(L, Z, name) {
this.intSize = 4;
this.size_tSize = 8;
this.instructionSize = 4;
this.integerSize = 4;
this.numberSize = 8;
- assert(buffer instanceof llex.MBuffer, "BytecodeParser only operates on a MBuffer");
+ assert(Z instanceof lzio.ZIO, "BytecodeParser only operates on a ZIO");
assert(Array.isArray(name));
if (name[0] == defs.char["@"] || name[0] == defs.char["="])
@@ -33,32 +33,32 @@ class BytecodeParser {
this.name = name;
this.L = L;
- this.buffer = buffer;
+ this.Z = Z;
// Used to do buffer to number conversions
- this.dv = new DataView(
- new ArrayBuffer(
- Math.max(this.intSize, this.size_tSize, this.instructionSize, this.integerSize, this.numberSize)
- )
+ this.arraybuffer = new ArrayBuffer(
+ Math.max(this.intSize, this.size_tSize, this.instructionSize, this.integerSize, this.numberSize)
);
+ this.dv = new DataView(this.arraybuffer);
+ this.u8 = new Uint8Array(this.arraybuffer);
}
read(size) {
- let buffer = this.buffer.read(size);
- assert(Array.isArray(buffer));
- if (buffer.length < size) this.error("truncated");
- return buffer;
+ let u8 = new Uint8Array(size);
+ if(lzio.luaZ_read(this.Z, u8, 0, size) !== 0)
+ this.error("truncated");
+ return Array.from(u8);
}
readByte() {
- return this.read(1)[0];
+ if (lzio.luaZ_read(this.Z, this.u8, 0, 1) !== 0)
+ this.error("truncated");
+ return this.u8[0];
}
readInteger() {
- let buffer = this.read(this.integerSize);
- for (let i = 0; i < buffer.length; i++)
- this.dv.setUint8(i, buffer[i]);
-
+ if (lzio.luaZ_read(this.Z, this.u8, 0, this.integerSize) !== 0)
+ this.error("truncated");
return this.dv.getInt32(0, true);
}
@@ -67,20 +67,14 @@ class BytecodeParser {
}
readInt() {
- let buffer = this.read(this.intSize);
-
- for (let i = 0; i < buffer.length; i++)
- this.dv.setUint8(i, buffer[i]);
-
+ if (lzio.luaZ_read(this.Z, this.u8, 0, this.intSize) !== 0)
+ this.error("truncated");
return this.dv.getInt32(0, true);
}
readNumber() {
- let buffer = this.read(this.numberSize);
-
- for (let i = 0; i < buffer.length; i++)
- this.dv.setUint8(i, buffer[i]);
-
+ if (lzio.luaZ_read(this.Z, this.u8, 0, this.numberSize) !== 0)
+ this.error("truncated");
return this.dv.getFloat64(0, true);
}
@@ -94,7 +88,7 @@ class BytecodeParser {
return null;
}
- return lstring.luaS_new(this.L, this.read(size));
+ return lstring.luaS_bless(this.L, this.read(size));
}
/* creates a mask with 'n' 1 bits at position 'p' */
@@ -108,11 +102,9 @@ class BytecodeParser {
}
readInstruction() {
- let ins = new DataView(new ArrayBuffer(this.instructionSize));
- for (let i = 0; i < this.instructionSize; i++)
- ins.setUint8(i, this.readByte());
-
- return ins.getUint32(0, true);
+ if (lzio.luaZ_read(this.Z, this.u8, 0, this.instructionSize) !== 0)
+ this.error("truncated");
+ return this.dv.getUint32(0, true);
}
readCode(f) {
@@ -269,8 +261,8 @@ class BytecodeParser {
}
}
-const luaU_undump = function(L, buffer, name) {
- let S = new BytecodeParser(L, buffer, name);
+const luaU_undump = function(L, Z, name) {
+ let S = new BytecodeParser(L, Z, name);
S.checkHeader();
let cl = lfunc.luaF_newLclosure(L, S.readByte());
L.stack[L.top++] = new lobject.TValue(defs.CT.LUA_TLCL, cl);