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-rw-r--r--middleware/node_modules/iconv-lite/encodings/sbcs-codec.js72
1 files changed, 72 insertions, 0 deletions
diff --git a/middleware/node_modules/iconv-lite/encodings/sbcs-codec.js b/middleware/node_modules/iconv-lite/encodings/sbcs-codec.js
new file mode 100644
index 0000000..abac5ff
--- /dev/null
+++ b/middleware/node_modules/iconv-lite/encodings/sbcs-codec.js
@@ -0,0 +1,72 @@
+"use strict";
+var Buffer = require("safer-buffer").Buffer;
+
+// Single-byte codec. Needs a 'chars' string parameter that contains 256 or 128 chars that
+// correspond to encoded bytes (if 128 - then lower half is ASCII).
+
+exports._sbcs = SBCSCodec;
+function SBCSCodec(codecOptions, iconv) {
+ if (!codecOptions)
+ throw new Error("SBCS codec is called without the data.")
+
+ // Prepare char buffer for decoding.
+ if (!codecOptions.chars || (codecOptions.chars.length !== 128 && codecOptions.chars.length !== 256))
+ throw new Error("Encoding '"+codecOptions.type+"' has incorrect 'chars' (must be of len 128 or 256)");
+
+ if (codecOptions.chars.length === 128) {
+ var asciiString = "";
+ for (var i = 0; i < 128; i++)
+ asciiString += String.fromCharCode(i);
+ codecOptions.chars = asciiString + codecOptions.chars;
+ }
+
+ this.decodeBuf = Buffer.from(codecOptions.chars, 'ucs2');
+
+ // Encoding buffer.
+ var encodeBuf = Buffer.alloc(65536, iconv.defaultCharSingleByte.charCodeAt(0));
+
+ for (var i = 0; i < codecOptions.chars.length; i++)
+ encodeBuf[codecOptions.chars.charCodeAt(i)] = i;
+
+ this.encodeBuf = encodeBuf;
+}
+
+SBCSCodec.prototype.encoder = SBCSEncoder;
+SBCSCodec.prototype.decoder = SBCSDecoder;
+
+
+function SBCSEncoder(options, codec) {
+ this.encodeBuf = codec.encodeBuf;
+}
+
+SBCSEncoder.prototype.write = function(str) {
+ var buf = Buffer.alloc(str.length);
+ for (var i = 0; i < str.length; i++)
+ buf[i] = this.encodeBuf[str.charCodeAt(i)];
+
+ return buf;
+}
+
+SBCSEncoder.prototype.end = function() {
+}
+
+
+function SBCSDecoder(options, codec) {
+ this.decodeBuf = codec.decodeBuf;
+}
+
+SBCSDecoder.prototype.write = function(buf) {
+ // Strings are immutable in JS -> we use ucs2 buffer to speed up computations.
+ var decodeBuf = this.decodeBuf;
+ var newBuf = Buffer.alloc(buf.length*2);
+ var idx1 = 0, idx2 = 0;
+ for (var i = 0; i < buf.length; i++) {
+ idx1 = buf[i]*2; idx2 = i*2;
+ newBuf[idx2] = decodeBuf[idx1];
+ newBuf[idx2+1] = decodeBuf[idx1+1];
+ }
+ return newBuf.toString('ucs2');
+}
+
+SBCSDecoder.prototype.end = function() {
+}