Add scala native platform

build.sbt

@@ -2,139 +2,159 @@ import scala.sys.process._
 
 Global / onChangedBuildSource := ReloadOnSourceChanges
 
-name := "scala-csv"
+ThisBuild / version := "2.0.0"
 
-version := "2.0.0"
+ThisBuild / scalaVersion := "2.13.15"
 
-scalaVersion := "2.13.15"
+val defaultCrossScalaVersions = Seq("2.12.20", "2.11.12", "2.10.7", "2.13.15", "3.3.4")
+val nativeScalaCrossVersions = Seq("2.12.20", "2.13.15", "3.3.4")
 
-crossScalaVersions := Seq("2.12.20", "2.11.12", "2.10.7", "2.13.15", "3.3.4")
+lazy val scalaCsv = crossProject(JVMPlatform, NativePlatform).crossType(CrossType.Pure).in(file(".")).settings(
+  name := "scala-csv",
 
-TaskKey[Unit]("checkScalariform") := {
-  val diff = "git diff".!!
-  if(diff.nonEmpty){
-    sys.error("Working directory is dirty!\n" + diff)
-  }
-}
+  crossScalaVersions := defaultCrossScalaVersions,
+
+  TaskKey[Unit]("checkScalariform") := {
+    val diff = "git diff".!!
+    if(diff.nonEmpty){
+      sys.error("Working directory is dirty!\n" + diff)
+    }
+  },
 
-organization := "com.github.tototoshi"
+  organization := "com.github.tototoshi",
 
-libraryDependencies ++= {
-  Seq(
+  libraryDependencies ++= Seq(
     "org.scalatest" %% "scalatest-funspec" % "3.2.19" % Test,
     "org.scalatest" %% "scalatest-shouldmatchers" % "3.2.19" % Test,
     if (scalaVersion.value.startsWith("2.")) "org.scalacheck" %% "scalacheck" % "1.14.3" % Test
     else "org.scalacheck" %% "scalacheck" % "1.18.1" % Test
-  )
-}
-
-val enableScalameter = settingKey[Boolean]("")
-
-enableScalameter := {
-  CrossVersion.partialVersion(scalaVersion.value) match {
-    case Some((2, v)) =>
-      11 <= v && v <= 13
-    case _ =>
-      false
-  }
-}
-
-libraryDependencies ++= {
-  if (enableScalameter.value) {
-    Seq("com.storm-enroute" %% "scalameter" % "0.19" % "test")
-  } else {
-    Nil
+  ),
+
+  libraryDependencies ++= {
+    if (enableScalameter.value) {
+      Seq("com.storm-enroute" %% "scalameter" % "0.19" % Test)
+    } else {
+      Nil
+    }
+  },
+
+  scalacOptions ++= Seq(
+    "-deprecation",
+    "-feature",
+    "-language:implicitConversions"
+  ),
+
+  scalacOptions ++= PartialFunction.condOpt(CrossVersion.partialVersion(scalaVersion.value)){
+    case Some((2, v)) if v >= 11 => Seq("-Ywarn-unused")
+  }.toList.flatten,
+
+  scalacOptions ++= PartialFunction.condOpt(CrossVersion.partialVersion(scalaVersion.value)){
+    case Some((2, 11 | 12)) =>
+      Seq("-Xsource:3")
+    case Some((2, 13)) =>
+      Seq("-Xsource:3-cross")
+  }.toList.flatten,
+
+  Test / sources := {
+    val s = (Test / sources).value
+    val exclude = Set("CsvBenchmark.scala")
+    if (enableScalameter.value) {
+      s
+    } else {
+      s.filterNot(f => exclude(f.getName))
+    }
+  },
+
+  testFrameworks ++= {
+    if (enableScalameter.value) {
+      Seq(new TestFramework("org.scalameter.ScalaMeterFramework"))
+    } else Nil
+  },
+
+  Test / parallelExecution := false,
+
+  logBuffered := false,
+
+  compile / javacOptions += "-Xlint",
+
+  compile / javacOptions ++= {
+    CrossVersion.partialVersion(scalaVersion.value) match {
+      case Some((2, v)) if v <= 11 =>
+        Seq("-target", "6", "-source", "6")
+      case _ =>
+        Seq("-target", "8", "-source", "8")
+    }
+  },
+
+  initialCommands := """
+                       |import com.github.tototoshi.csv._
+                     """.stripMargin,
+
+  publishMavenStyle := true,
+
+  publishTo := {
+    val nexus = "https://oss.sonatype.org/"
+    if (version.value.trim.endsWith("SNAPSHOT"))
+      Some("snapshots" at nexus + "content/repositories/snapshots")
+    else
+      Some("releases"  at nexus + "service/local/staging/deploy/maven2")
+  },
+
+  Test / publishArtifact := false,
+
+  pomExtra := <url>https://github.com/tototoshi/scala-csv</url>
+    <licenses>
+      <license>
+        <name>Apache License, Version 2.0</name>
+        <url>http://www.apache.org/licenses/LICENSE-2.0.html</url>
+        <distribution>repo</distribution>
+      </license>
+    </licenses>
+    <scm>
+      <url>[email protected]:tototoshi/scala-csv.git</url>
+      <connection>scm:git:[email protected]:tototoshi/scala-csv.git</connection>
+    </scm>
+    <developers>
+      <developer>
+        <id>tototoshi</id>
+        <name>Toshiyuki Takahashi</name>
+        <url>https://tototoshi.github.io</url>
+      </developer>
+    </developers>,
+
+  Compile / unmanagedSourceDirectories += {
+    val dir = CrossVersion.partialVersion(scalaVersion.value) match {
+      case Some((2, v)) if v <= 12 =>
+        "scala-2.13-"
+      case _ =>
+        "scala-2.13+"
+    }
+    crossProjectBaseDirectory.value / "src" / "main" / dir
+  },
+  Compile / unmanagedSourceDirectories += {
+    val dir = crossProjectPlatform.value match {
+      case JVMPlatform => "java" // for binary compatibility with previous JVM publications, to be deprecated
+      case _ => "scala-readers"
+    }
+    crossProjectBaseDirectory.value / "src" / "main" / dir
   }
-}
-
-scalacOptions ++= Seq(
-  "-deprecation",
-  "-feature",
-  "-language:implicitConversions"
+).nativeSettings(
+  crossScalaVersions := nativeScalaCrossVersions
 )
 
-scalacOptions ++= PartialFunction.condOpt(CrossVersion.partialVersion(scalaVersion.value)){
-  case Some((2, v)) if v >= 11 => Seq("-Ywarn-unused")
-}.toList.flatten
-
-scalacOptions ++= PartialFunction.condOpt(CrossVersion.partialVersion(scalaVersion.value)){
-  case Some((2, 11 | 12)) =>
-    Seq("-Xsource:3")
-  case Some((2, 13)) =>
-    Seq("-Xsource:3-cross")
-}.toList.flatten
-
-Test / sources := {
-  val s = (Test / sources).value
-  val exclude = Set("CsvBenchmark.scala")
-  if (enableScalameter.value) {
-    s
-  } else {
-    s.filterNot(f => exclude(f.getName))
+val enableScalameter = Def.setting(
+  CrossVersion.partialVersion(scalaVersion.value) match {
+    case Some((2, v)) => 11 <= v && v <= 13 && crossProjectPlatform.value == JVMPlatform
+    case _ => false
   }
-}
-
-testFrameworks += new TestFramework(
-  "org.scalameter.ScalaMeterFramework"
 )
 
-Test / parallelExecution := false
-
-logBuffered := false
-
-compile / javacOptions += "-Xlint"
-
-compile / javacOptions ++= {
-  CrossVersion.partialVersion(scalaVersion.value) match {
-    case Some((2, v)) if v <= 11 =>
-      Seq("-target", "6", "-source", "6")
-    case _ =>
-      Seq("-target", "8", "-source", "8")
-  }
-}
-
-initialCommands := """
-                     |import com.github.tototoshi.csv._
-                   """.stripMargin
-
-publishMavenStyle := true
-
-publishTo := {
-  val nexus = "https://oss.sonatype.org/"
-  if (version.value.trim.endsWith("SNAPSHOT"))
-    Some("snapshots" at nexus + "content/repositories/snapshots")
-  else
-    Some("releases"  at nexus + "service/local/staging/deploy/maven2")
-}
-
-Test / publishArtifact := false
-
-pomExtra := <url>https://github.com/tototoshi/scala-csv</url>
-<licenses>
-  <license>
-    <name>Apache License, Version 2.0</name>
-    <url>http://www.apache.org/licenses/LICENSE-2.0.html</url>
-    <distribution>repo</distribution>
-  </license>
-</licenses>
-<scm>
-  <url>[email protected]:tototoshi/scala-csv.git</url>
-  <connection>scm:git:[email protected]:tototoshi/scala-csv.git</connection>
-</scm>
-<developers>
-  <developer>
-    <id>tototoshi</id>
-    <name>Toshiyuki Takahashi</name>
-    <url>https://tototoshi.github.io</url>
-  </developer>
-</developers>
-
-Compile / unmanagedSourceDirectories += {
-  val dir = CrossVersion.partialVersion(scalaVersion.value) match {
-    case Some((2, v)) if v <= 12 =>
-      "scala-2.13-"
-    case _ =>
-      "scala-2.13+"
-  }
-  baseDirectory.value / "src" / "main" / dir
-}
+// an aggregate project to pass commands into platform projects
+lazy val root = (project in file("."))
+  .aggregate(scalaCsv.jvm, scalaCsv.native)
+  .settings(
+    Compile / sources := Seq.empty,
+    Test / sources := Seq.empty,
+    artifacts := Seq.empty,
+    publish / skip := true,
+  )

project/plugins.sbt

@@ -6,4 +6,8 @@ addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.9.21")
 
 addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.3.1")
 
+addSbtPlugin("org.portable-scala" % "sbt-crossproject" % "1.3.2")
+addSbtPlugin("org.scala-native"   % "sbt-scala-native" % "0.5.7")
+addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.3.2")
+
 libraryDependencySchemes += "org.scala-lang.modules" %% "scala-xml" % "always"

src/main/scala-readers/com/github/tototoshi/csv/LineReader.scala

@@ -0,0 +1,9 @@
+package com.github.tototoshi.csv
+
+import java.io.Closeable
+import java.io.IOException
+
+trait LineReader extends Closeable {
+  @throws[IOException]
+  def readLineWithTerminator(): String
+}

src/main/scala-readers/com/github/tototoshi/csv/ReaderLineReader.scala

@@ -0,0 +1,40 @@
+package com.github.tototoshi.csv
+
+import java.io.BufferedReader
+import java.io.IOException
+import java.io.Reader
+
+class ReaderLineReader(baseReader: Reader) extends LineReader {
+  private val bufferedReader: BufferedReader = new BufferedReader(baseReader)
+
+  @throws[IOException]
+  def readLineWithTerminator(): String = {
+    val sb = new StringBuilder()
+    var c: Int = 0
+
+    while (c != -1) {
+      c = bufferedReader.read()
+      if (c != -1) sb.append(c.toChar)
+      if (c == '\n' || c == '\u2028' || c == '\u2029' || c == '\u0085') {
+        c = -1
+      }
+      if (c == '\r') {
+        bufferedReader.mark(1)
+        c = bufferedReader.read()
+        if (c == '\n') {
+          sb.append('\n')
+        } else {
+          bufferedReader.reset()
+        }
+        c = -1
+      }
+    }
+    if (sb.isEmpty) null else sb.toString()
+  }
+
+  @throws[IOException]
+  def close(): Unit = {
+    bufferedReader.close()
+    baseReader.close()
+  }
+}

src/main/scala-readers/com/github/tototoshi/csv/SourceLineReader.scala

@@ -0,0 +1,40 @@
+package com.github.tototoshi.csv
+
+import java.io.IOException
+import scala.io.Source
+
+class SourceLineReader(source: Source) extends LineReader {
+
+  private var buffer: Int = -1
+
+  @throws[IOException]
+  def readLineWithTerminator(): String = {
+    val sb = new StringBuilder()
+    var c: Int = 0
+
+    while (c != -1) {
+      if (buffer != -1) {
+        c = buffer
+        buffer = -1
+      } else {
+        c = if (source.hasNext) source.next() else -1
+      }
+      if (c != -1) sb.append(c.toChar)
+      if (c == '\n' || c == '\u2028' || c == '\u2029' || c == '\u0085') {
+        c = -1
+      }
+      if (c == '\r') {
+        buffer = if (source.hasNext) source.next() else -1
+        if (buffer == '\n') {
+          sb.append('\n')
+          buffer = -1
+        }
+        c = -1
+      }
+    }
+    if (sb.isEmpty) null else sb.toString()
+  }
+
+  @throws[IOException]
+  override def close(): Unit = source.close()
+}