1 files changed, 112 insertions, 0 deletions
diff --git a/node_modules/mdurl/lib/decode.mjs b/node_modules/mdurl/lib/decode.mjs
new file mode 100644
index 0000000..9fdc133
--- /dev/null
+++ b/node_modules/mdurl/lib/decode.mjs
@@ -0,0 +1,112 @@
+/* eslint-disable no-bitwise */
+
+const decodeCache = {}
+
+function getDecodeCache (exclude) {
+  let cache = decodeCache[exclude]
+  if (cache) { return cache }
+
+  cache = decodeCache[exclude] = []
+
+  for (let i = 0; i < 128; i++) {
+    const ch = String.fromCharCode(i)
+    cache.push(ch)
+  }
+
+  for (let i = 0; i < exclude.length; i++) {
+    const ch = exclude.charCodeAt(i)
+    cache[ch] = '%' + ('0' + ch.toString(16).toUpperCase()).slice(-2)
+  }
+
+  return cache
+}
+
+// Decode percent-encoded string.
+//
+function decode (string, exclude) {
+  if (typeof exclude !== 'string') {
+    exclude = decode.defaultChars
+  }
+
+  const cache = getDecodeCache(exclude)
+
+  return string.replace(/(%[a-f0-9]{2})+/gi, function (seq) {
+    let result = ''
+
+    for (let i = 0, l = seq.length; i < l; i += 3) {
+      const b1 = parseInt(seq.slice(i + 1, i + 3), 16)
+
+      if (b1 < 0x80) {
+        result += cache[b1]
+        continue
+      }
+
+      if ((b1 & 0xE0) === 0xC0 && (i + 3 < l)) {
+        // 110xxxxx 10xxxxxx
+        const b2 = parseInt(seq.slice(i + 4, i + 6), 16)
+
+        if ((b2 & 0xC0) === 0x80) {
+          const chr = ((b1 << 6) & 0x7C0) | (b2 & 0x3F)
+
+          if (chr < 0x80) {
+            result += '\ufffd\ufffd'
+          } else {
+            result += String.fromCharCode(chr)
+          }
+
+          i += 3
+          continue
+        }
+      }
+
+      if ((b1 & 0xF0) === 0xE0 && (i + 6 < l)) {
+        // 1110xxxx 10xxxxxx 10xxxxxx
+        const b2 = parseInt(seq.slice(i + 4, i + 6), 16)
+        const b3 = parseInt(seq.slice(i + 7, i + 9), 16)
+
+        if ((b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
+          const chr = ((b1 << 12) & 0xF000) | ((b2 << 6) & 0xFC0) | (b3 & 0x3F)
+
+          if (chr < 0x800 || (chr >= 0xD800 && chr <= 0xDFFF)) {
+            result += '\ufffd\ufffd\ufffd'
+          } else {
+            result += String.fromCharCode(chr)
+          }
+
+          i += 6
+          continue
+        }
+      }
+
+      if ((b1 & 0xF8) === 0xF0 && (i + 9 < l)) {
+        // 111110xx 10xxxxxx 10xxxxxx 10xxxxxx
+        const b2 = parseInt(seq.slice(i + 4, i + 6), 16)
+        const b3 = parseInt(seq.slice(i + 7, i + 9), 16)
+        const b4 = parseInt(seq.slice(i + 10, i + 12), 16)
+
+        if ((b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80 && (b4 & 0xC0) === 0x80) {
+          let chr = ((b1 << 18) & 0x1C0000) | ((b2 << 12) & 0x3F000) | ((b3 << 6) & 0xFC0) | (b4 & 0x3F)
+
+          if (chr < 0x10000 || chr > 0x10FFFF) {
+            result += '\ufffd\ufffd\ufffd\ufffd'
+          } else {
+            chr -= 0x10000
+            result += String.fromCharCode(0xD800 + (chr >> 10), 0xDC00 + (chr & 0x3FF))
+          }
+
+          i += 9
+          continue
+        }
+      }
+
+      result += '\ufffd'
+    }
+
+    return result
+  })
+}
+
+decode.defaultChars = ';/?:@&=+$,#'
+decode.componentChars = ''
+
+export default decode