diff options
Diffstat (limited to 'deps/npm/node_modules/node-gyp/node_modules/tar/lib/extended-header.js')
-rw-r--r-- | deps/npm/node_modules/node-gyp/node_modules/tar/lib/extended-header.js | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/deps/npm/node_modules/node-gyp/node_modules/tar/lib/extended-header.js b/deps/npm/node_modules/node-gyp/node_modules/tar/lib/extended-header.js new file mode 100644 index 0000000000..74f432ceee --- /dev/null +++ b/deps/npm/node_modules/node-gyp/node_modules/tar/lib/extended-header.js @@ -0,0 +1,140 @@ +// An Entry consisting of: +// +// "%d %s=%s\n", <length>, <keyword>, <value> +// +// The length is a decimal number, and includes itself and the \n +// \0 does not terminate anything. Only the length terminates the string. +// Numeric values are decimal strings. + +module.exports = ExtendedHeader + +var Entry = require("./entry.js") + , inherits = require("inherits") + , tar = require("../tar.js") + , numeric = tar.numeric + , keyTrans = { "SCHILY.dev": "dev" + , "SCHILY.ino": "ino" + , "SCHILY.nlink": "nlink" } + +function ExtendedHeader () { + Entry.apply(this, arguments) + this.on("data", this._parse) + this.fields = {} + this._position = 0 + this._fieldPos = 0 + this._state = SIZE + this._sizeBuf = [] + this._keyBuf = [] + this._valBuf = [] + this._size = -1 + this._key = "" +} + +inherits(ExtendedHeader, Entry) +ExtendedHeader.prototype._parse = parse + +var s = 0 + , states = ExtendedHeader.states = {} + , SIZE = states.SIZE = s++ + , KEY = states.KEY = s++ + , VAL = states.VAL = s++ + , ERR = states.ERR = s++ + +Object.keys(states).forEach(function (s) { + states[states[s]] = states[s] +}) + +states[s] = null + +// char code values for comparison +var _0 = "0".charCodeAt(0) + , _9 = "9".charCodeAt(0) + , point = ".".charCodeAt(0) + , a = "a".charCodeAt(0) + , Z = "Z".charCodeAt(0) + , a = "a".charCodeAt(0) + , z = "z".charCodeAt(0) + , space = " ".charCodeAt(0) + , eq = "=".charCodeAt(0) + , cr = "\n".charCodeAt(0) + +function parse (c) { + if (this._state === ERR) return + + for ( var i = 0, l = c.length + ; i < l + ; this._position++, this._fieldPos++, i++) { + // console.error("top of loop, size="+this._size) + + var b = c[i] + + if (this._size >= 0 && this._fieldPos > this._size) { + error(this, "field exceeds length="+this._size) + return + } + + switch (this._state) { + case ERR: return + + case SIZE: + // console.error("parsing size, b=%d, rest=%j", b, c.slice(i).toString()) + if (b === space) { + this._state = KEY + // this._fieldPos = this._sizeBuf.length + this._size = parseInt(new Buffer(this._sizeBuf).toString(), 10) + this._sizeBuf.length = 0 + continue + } + if (b < _0 || b > _9) { + error(this, "expected [" + _0 + ".." + _9 + "], got " + b) + return + } + this._sizeBuf.push(b) + continue + + case KEY: + // can be any char except =, not > size. + if (b === eq) { + this._state = VAL + this._key = new Buffer(this._keyBuf).toString() + if (keyTrans[this._key]) this._key = keyTrans[this._key] + this._keyBuf.length = 0 + continue + } + this._keyBuf.push(b) + continue + + case VAL: + // field must end with cr + if (this._fieldPos === this._size - 1) { + // console.error("finished with "+this._key) + if (b !== cr) { + error(this, "expected \\n at end of field") + return + } + var val = new Buffer(this._valBuf).toString() + if (numeric[this._key]) { + val = parseFloat(val) + } + this.fields[this._key] = val + + this._valBuf.length = 0 + this._state = SIZE + this._size = -1 + this._fieldPos = -1 + continue + } + this._valBuf.push(b) + continue + } + } +} + +function error (me, msg) { + msg = "invalid header: " + msg + + "\nposition=" + me._position + + "\nfield position=" + me._fieldPos + + me.error(msg) + me.state = ERR +} |