diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/lundump.js | 96 |
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) { |