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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
commite06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch)
tree55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/saslprep/generate-code-points.js
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Diffstat (limited to 'node_modules/saslprep/generate-code-points.js')
-rw-r--r--node_modules/saslprep/generate-code-points.js51
1 files changed, 51 insertions, 0 deletions
diff --git a/node_modules/saslprep/generate-code-points.js b/node_modules/saslprep/generate-code-points.js
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+++ b/node_modules/saslprep/generate-code-points.js
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+'use strict';
+
+const bitfield = require('sparse-bitfield');
+const codePoints = require('./lib/code-points');
+
+const unassigned_code_points = bitfield();
+const commonly_mapped_to_nothing = bitfield();
+const non_ascii_space_characters = bitfield();
+const prohibited_characters = bitfield();
+const bidirectional_r_al = bitfield();
+const bidirectional_l = bitfield();
+
+/**
+ * Iterare over code points and
+ * convert it into an buffer.
+ * @param {bitfield} bits
+ * @param {Array} src
+ * @returns {Buffer}
+ */
+function traverse(bits, src) {
+ for (const code of src.keys()) {
+ bits.set(code, true);
+ }
+
+ const buffer = bits.toBuffer();
+ return Buffer.concat([createSize(buffer), buffer]);
+}
+
+/**
+ * @param {Buffer} buffer
+ * @returns {Buffer}
+ */
+function createSize(buffer) {
+ const buf = Buffer.alloc(4);
+ buf.writeUInt32BE(buffer.length);
+
+ return buf;
+}
+
+const memory = [];
+
+memory.push(
+ traverse(unassigned_code_points, codePoints.unassigned_code_points),
+ traverse(commonly_mapped_to_nothing, codePoints.commonly_mapped_to_nothing),
+ traverse(non_ascii_space_characters, codePoints.non_ASCII_space_characters),
+ traverse(prohibited_characters, codePoints.prohibited_characters),
+ traverse(bidirectional_r_al, codePoints.bidirectional_r_al),
+ traverse(bidirectional_l, codePoints.bidirectional_l)
+);
+
+process.stdout.write(Buffer.concat(memory));