Initial commit

node_modules/postgres-bytea/decode.js

@@ -0,0 +1,40 @@
+'use strict'
+
+module.exports = byteaToBinary
+
+function byteaToBinary (input) {
+  if (/^\\x/.test(input)) {
+    return byteaHexFormatToBinary(input)
+  }
+  return byteaEscapeFormatToBinary(input)
+}
+
+function byteaHexFormatToBinary (input) {
+  return Buffer.from(input.substr(2), 'hex')
+}
+
+function byteaEscapeFormatToBinary (input) {
+  let output = ''
+  let i = 0
+  while (i < input.length) {
+    if (input[i] !== '\\') {
+      output += input[i]
+      ++i
+    } else {
+      if (/[0-7]{3}/.test(input.substr(i + 1, 3))) {
+        output += String.fromCharCode(parseInt(input.substr(i + 1, 3), 8))
+        i += 4
+      } else {
+        let backslashes = 1
+        while (i + backslashes < input.length && input[i + backslashes] === '\\') {
+          backslashes++
+        }
+        for (let k = 0; k < Math.floor(backslashes / 2); ++k) {
+          output += '\\'
+        }
+        i += Math.floor(backslashes / 2) * 2
+      }
+    }
+  }
+  return Buffer.from(output, 'binary')
+}