From d34f0506bdc4fef2bcca82a70e67aa15aad75cb9 Mon Sep 17 00:00:00 2001
From: Li Haoyi <haoyi.sg@gmail.com>
Date: Mon, 13 Aug 2018 01:39:41 +0800
Subject: trim unnecessary dependencies

---
 cask/src/cask/internal/Util.scala  | 32 ++++++++++++++++++++++++++++++++
 cask/src/cask/main/ErrorMsgs.scala |  3 +--
 2 files changed, 33 insertions(+), 2 deletions(-)

(limited to 'cask')

diff --git a/cask/src/cask/internal/Util.scala b/cask/src/cask/internal/Util.scala
index b4f33a8..7da343e 100644
--- a/cask/src/cask/internal/Util.scala
+++ b/cask/src/cask/internal/Util.scala
@@ -6,7 +6,39 @@ import scala.collection.generic.CanBuildFrom
 import scala.collection.mutable
 import java.io.OutputStream
 
+import scala.annotation.switch
+
 object Util {
+
+  /**
+    * Convert a string to a C&P-able literal. Basically
+    * copied verbatim from the uPickle source code.
+    */
+  def literalize(s: IndexedSeq[Char], unicode: Boolean = true) = {
+    val sb = new StringBuilder
+    sb.append('"')
+    var i = 0
+    val len = s.length
+    while (i < len) {
+      (s(i): @switch) match {
+        case '"' => sb.append("\\\"")
+        case '\\' => sb.append("\\\\")
+        case '\b' => sb.append("\\b")
+        case '\f' => sb.append("\\f")
+        case '\n' => sb.append("\\n")
+        case '\r' => sb.append("\\r")
+        case '\t' => sb.append("\\t")
+        case c =>
+          if (c < ' ' || (c > '~' && unicode)) sb.append("\\u%04x" format c.toInt)
+          else sb.append(c)
+      }
+      i += 1
+    }
+    sb.append('"')
+
+    sb.result()
+  }
+
   def transferTo(in: InputStream, out: OutputStream) = {
     val buffer = new Array[Byte](8192)
 
diff --git a/cask/src/cask/main/ErrorMsgs.scala b/cask/src/cask/main/ErrorMsgs.scala
index f5d9cc7..c296504 100644
--- a/cask/src/cask/main/ErrorMsgs.scala
+++ b/cask/src/cask/main/ErrorMsgs.scala
@@ -1,9 +1,8 @@
 package cask.main
 
-import java.io.{PrintWriter, StringWriter}
 
 import cask.internal.{Router, Util}
-import fastparse.utils.Utils.literalize
+import cask.internal.Util.literalize
 
 object ErrorMsgs {
 
-- 
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