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authordaurnimator <quae@daurnimator.com>2018-01-18 07:33:56 +1100
committerdaurnimator <quae@daurnimator.com>2018-01-18 07:33:56 +1100
commit583bb2e168292f0415bf1382186f5599a7a0385c (patch)
tree6002543393ddd525b7e49d8bf5c337352b7aef95 /src
parent53d2c6475ec23b5e088ea43b96008d3bdd607351 (diff)
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src/lundump.js: Use destructuring assignment where sensible
Diffstat (limited to 'src')
-rw-r--r--src/lundump.js96
1 files changed, 58 insertions, 38 deletions
diff --git a/src/lundump.js b/src/lundump.js
index f389950..1255114 100644
--- a/src/lundump.js
+++ b/src/lundump.js
@@ -1,26 +1,47 @@
"use strict";
-const defs = require('./defs.js');
+const {
+ LUA_SIGNATURE,
+ char,
+ constant_types: {
+ LUA_TBOOLEAN,
+ LUA_TLNGSTR,
+ LUA_TNIL,
+ LUA_TNUMFLT,
+ LUA_TNUMINT,
+ LUA_TSHRSTR
+ },
+ thread_status: { LUA_ERRSYNTAX },
+ is_luastring,
+ luastring_eq,
+ to_luastring
+} = require('./defs.js');
const ldo = require('./ldo.js');
const lfunc = require('./lfunc.js');
const lobject = require('./lobject.js');
-const lopcodes = require('./lopcodes.js');
-const { lua_assert } = require("./llimits.js");
const {
- luaS_bless
-} = require('./lstring.js');
-const lzio = require('./lzio.js');
-
+ MAXARG_sBx,
+ POS_A,
+ POS_Ax,
+ POS_B,
+ POS_Bx,
+ POS_C,
+ POS_OP,
+ SIZE_A,
+ SIZE_Ax,
+ SIZE_B,
+ SIZE_Bx,
+ SIZE_C,
+ SIZE_OP
+} = require('./lopcodes.js');
+const { lua_assert } = require("./llimits.js");
+const { luaS_bless } = require('./lstring.js');
const {
- LUA_TBOOLEAN,
- LUA_TLNGSTR,
- LUA_TNIL,
- LUA_TNUMFLT,
- LUA_TNUMINT,
- LUA_TSHRSTR
-} = defs.constant_types;
+ luaZ_read,
+ ZIO
+} = require('./lzio.js');
-let LUAC_DATA = [0x19, 0x93, defs.char["\r"], defs.char["\n"], 0x1a, defs.char["\n"]];
+let LUAC_DATA = [0x19, 0x93, char["\r"], char["\n"], 0x1a, char["\n"]];
class BytecodeParser {
@@ -31,13 +52,13 @@ class BytecodeParser {
this.integerSize = 4;
this.numberSize = 8;
- lua_assert(Z instanceof lzio.ZIO, "BytecodeParser only operates on a ZIO");
- lua_assert(defs.is_luastring(name));
+ lua_assert(Z instanceof ZIO, "BytecodeParser only operates on a ZIO");
+ lua_assert(is_luastring(name));
- if (name[0] == defs.char["@"] || name[0] == defs.char["="])
+ if (name[0] == char["@"] || name[0] == char["="])
this.name = name.subarray(1);
- else if (name[0] == defs.LUA_SIGNATURE.charCodeAt(0))
- this.name = defs.to_luastring("binary string", true);
+ else if (name[0] == LUA_SIGNATURE.charCodeAt(0))
+ this.name = to_luastring("binary string", true);
else
this.name = name;
@@ -54,19 +75,19 @@ class BytecodeParser {
read(size) {
let u8 = new Uint8Array(size);
- if(lzio.luaZ_read(this.Z, u8, 0, size) !== 0)
+ if(luaZ_read(this.Z, u8, 0, size) !== 0)
this.error("truncated");
return u8;
}
readByte() {
- if (lzio.luaZ_read(this.Z, this.u8, 0, 1) !== 0)
+ if (luaZ_read(this.Z, this.u8, 0, 1) !== 0)
this.error("truncated");
return this.u8[0];
}
readInteger() {
- if (lzio.luaZ_read(this.Z, this.u8, 0, this.integerSize) !== 0)
+ if (luaZ_read(this.Z, this.u8, 0, this.integerSize) !== 0)
this.error("truncated");
return this.dv.getInt32(0, true);
}
@@ -76,13 +97,13 @@ class BytecodeParser {
}
readInt() {
- if (lzio.luaZ_read(this.Z, this.u8, 0, this.intSize) !== 0)
+ if (luaZ_read(this.Z, this.u8, 0, this.intSize) !== 0)
this.error("truncated");
return this.dv.getInt32(0, true);
}
readNumber() {
- if (lzio.luaZ_read(this.Z, this.u8, 0, this.numberSize) !== 0)
+ if (luaZ_read(this.Z, this.u8, 0, this.numberSize) !== 0)
this.error("truncated");
return this.dv.getFloat64(0, true);
}
@@ -111,27 +132,26 @@ class BytecodeParser {
}
readInstruction() {
- if (lzio.luaZ_read(this.Z, this.u8, 0, this.instructionSize) !== 0)
+ 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();
- let o = lopcodes;
let p = BytecodeParser;
for (let i = 0; i < n; i++) {
let ins = this.readInstruction();
f.code[i] = {
code: ins,
- opcode: (ins >> o.POS_OP) & p.MASK1(o.SIZE_OP, 0),
- A: (ins >> o.POS_A) & p.MASK1(o.SIZE_A, 0),
- B: (ins >> o.POS_B) & p.MASK1(o.SIZE_B, 0),
- C: (ins >> o.POS_C) & p.MASK1(o.SIZE_C, 0),
- Bx: (ins >> o.POS_Bx) & p.MASK1(o.SIZE_Bx, 0),
- Ax: (ins >> o.POS_Ax) & p.MASK1(o.SIZE_Ax, 0),
- sBx: ((ins >> o.POS_Bx) & p.MASK1(o.SIZE_Bx, 0)) - o.MAXARG_sBx
+ opcode: (ins >> POS_OP) & p.MASK1(SIZE_OP, 0),
+ A: (ins >> POS_A) & p.MASK1(SIZE_A, 0),
+ B: (ins >> POS_B) & p.MASK1(SIZE_B, 0),
+ C: (ins >> POS_C) & p.MASK1(SIZE_C, 0),
+ Bx: (ins >> POS_Bx) & p.MASK1(SIZE_Bx, 0),
+ Ax: (ins >> POS_Ax) & p.MASK1(SIZE_Ax, 0),
+ sBx: ((ins >> POS_Bx) & p.MASK1(SIZE_Bx, 0)) - MAXARG_sBx
};
}
}
@@ -224,12 +244,12 @@ class BytecodeParser {
checkliteral(s, msg) {
let buff = this.read(s.length);
- if (!defs.luastring_eq(buff, s))
+ if (!luastring_eq(buff, s))
this.error(msg);
}
checkHeader() {
- this.checkliteral(defs.to_luastring(defs.LUA_SIGNATURE.substring(1)), "not a"); /* 1st char already checked */
+ this.checkliteral(to_luastring(LUA_SIGNATURE.substring(1)), "not a"); /* 1st char already checked */
if (this.readByte() !== 0x53)
this.error("version mismatch in");
@@ -260,8 +280,8 @@ class BytecodeParser {
}
error(why) {
- lobject.luaO_pushfstring(this.L, defs.to_luastring("%s: %s precompiled chunk"), this.name, defs.to_luastring(why));
- ldo.luaD_throw(this.L, defs.thread_status.LUA_ERRSYNTAX);
+ lobject.luaO_pushfstring(this.L, to_luastring("%s: %s precompiled chunk"), this.name, to_luastring(why));
+ ldo.luaD_throw(this.L, LUA_ERRSYNTAX);
}
checksize(byte, size, tname) {