update0.1.0

13 files changed, 541 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..dca3b96
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,19 @@
+# Created by .ignore support plugin (hsz.mobi)
+### Gradle template
+.gradle
+/build/
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+# Cache of project
+.gradletasknamecache
+
+# # Work around https://youtrack.jetbrains.com/issue/IDEA-116898
+# gradle/wrapper/gradle-wrapper.properties
+
+*.iml
+.idea/
\ No newline at end of file
diff --git a/README.md b/README.md
index 562fa82..54ea893 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,2 @@
 # gjavah
+
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..8cc9f05
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,35 @@
+group 'org.glavo'
+version '0.1.0'
+
+apply plugin: 'java'
+
+sourceCompatibility = 1.6
+targetCompatibility = 1.6
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    compile group: 'org.ow2.asm', name: 'asm', version: '6.1.1'
+
+    testCompile group: 'junit', name: 'junit', version: '4.12'
+}
+
+jar {
+    manifest {
+        attributes 'Implementation-Version': '1.2',
+                'Main-Class': 'org.glavo.javah.HeaderGenerator'
+    }
+}
+
+task fatJar(type: Jar) {
+    baseName = project.name + '-all'
+    description = 'Assembles a jar archive containing the main classes and all the dependencies.'
+    from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
+    manifest {
+        attributes 'Implementation-Version': '1.2',
+                'Main-Class': 'org.glavo.javah.HeaderGenerator'
+    }
+    with jar
+}
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..01b8bf6
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.jar
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..933b647
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-bin.zip
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..cccdd3d
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..e95643d
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off

+@rem ##########################################################################

+@rem

+@rem  Gradle startup script for Windows

+@rem

+@rem ##########################################################################

+

+@rem Set local scope for the variables with windows NT shell

+if "%OS%"=="Windows_NT" setlocal

+

+set DIRNAME=%~dp0

+if "%DIRNAME%" == "" set DIRNAME=.

+set APP_BASE_NAME=%~n0

+set APP_HOME=%DIRNAME%

+

+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.

+set DEFAULT_JVM_OPTS=

+

+@rem Find java.exe

+if defined JAVA_HOME goto findJavaFromJavaHome

+

+set JAVA_EXE=java.exe

+%JAVA_EXE% -version >NUL 2>&1

+if "%ERRORLEVEL%" == "0" goto init

+

+echo.

+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.

+echo.

+echo Please set the JAVA_HOME variable in your environment to match the

+echo location of your Java installation.

+

+goto fail

+

+:findJavaFromJavaHome

+set JAVA_HOME=%JAVA_HOME:"=%

+set JAVA_EXE=%JAVA_HOME%/bin/java.exe

+

+if exist "%JAVA_EXE%" goto init

+

+echo.

+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%

+echo.

+echo Please set the JAVA_HOME variable in your environment to match the

+echo location of your Java installation.

+

+goto fail

+

+:init

+@rem Get command-line arguments, handling Windows variants

+

+if not "%OS%" == "Windows_NT" goto win9xME_args

+

+:win9xME_args

+@rem Slurp the command line arguments.

+set CMD_LINE_ARGS=

+set _SKIP=2

+

+:win9xME_args_slurp

+if "x%~1" == "x" goto execute

+

+set CMD_LINE_ARGS=%*

+

+:execute

+@rem Setup the command line

+

+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar

+

+@rem Execute Gradle

+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%

+

+:end

+@rem End local scope for the variables with windows NT shell

+if "%ERRORLEVEL%"=="0" goto mainEnd

+

+:fail

+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of

+rem the _cmd.exe /c_ return code!

+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1

+exit /b 1

+

+:mainEnd

+if "%OS%"=="Windows_NT" endlocal

+

+:omega

diff --git a/out/production/classes/org/glavo/javah/Generator.class b/out/production/classes/org/glavo/javah/Generator.class
new file mode 100644
index 0000000..cc55414
--- /dev/null
+++ b/out/production/classes/org/glavo/javah/Generator.class
diff --git a/out/production/classes/org/glavo/javah/HeaderGenerator.class b/out/production/classes/org/glavo/javah/HeaderGenerator.class
new file mode 100644
index 0000000..e59a371
--- /dev/null
+++ b/out/production/classes/org/glavo/javah/HeaderGenerator.class
diff --git a/out/production/classes/org/glavo/javah/MethodDesc.class b/out/production/classes/org/glavo/javah/MethodDesc.class
new file mode 100644
index 0000000..bdbf58d
--- /dev/null
+++ b/out/production/classes/org/glavo/javah/MethodDesc.class
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..55c044f
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,2 @@
+rootProject.name = 'gjavah'
+
diff --git a/src/main/java/org/glavo/javah/HeaderGenerator.java b/src/main/java/org/glavo/javah/HeaderGenerator.java
new file mode 100644
index 0000000..368b2d5
--- /dev/null
+++ b/src/main/java/org/glavo/javah/HeaderGenerator.java
@@ -0,0 +1,209 @@
+package org.glavo.javah;
+
+import org.objectweb.asm.*;
+
+import java.io.*;
+import java.util.LinkedHashMap;
+import java.util.LinkedHashSet;
+import java.util.Map;
+import java.util.Set;
+
+public final class HeaderGenerator {
+    private static String escape(String source) {
+        StringBuilder builder = new StringBuilder();
+        char ch;
+        for (int i = 0; i < source.length(); i++) {
+            switch (ch = source.charAt(i)) {
+                case '_':
+                    builder.append("_1");
+                    break;
+                case ';':
+                    builder.append("_2");
+                    break;
+                case '[':
+                    builder.append("_3");
+                    break;
+                case '/':
+                    builder.append('.');
+                    break;
+                default:
+                    if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')) {
+                        builder.append(ch);
+                    } else {
+                        builder.append("_0").append(String.format("%04x", (int) ch));
+                    }
+            }
+        }
+        return builder.toString();
+    }
+
+    private static String typeToNative(Type tpe) {
+        if (tpe == Type.BOOLEAN_TYPE) {
+            return "jboolean";
+        } else if (tpe == Type.BYTE_TYPE) {
+            return "jbyte";
+        } else if (tpe == Type.CHAR_TYPE) {
+            return "jchar";
+        } else if (tpe == Type.SHORT_TYPE) {
+            return "jshort";
+        } else if (tpe == Type.INT_TYPE) {
+            return "jint";
+        } else if (tpe == Type.LONG_TYPE) {
+            return "jlong";
+        } else if (tpe == Type.FLOAT_TYPE) {
+            return "jfloat";
+        } else if (tpe == Type.DOUBLE_TYPE) {
+            return "jdouble";
+        } else if (tpe == Type.VOID_TYPE) {
+            return "void";
+        } else {
+            String str = tpe.toString();
+            if (str.startsWith("[")) {
+                str = typeToNative(tpe.getElementType());
+                if ("jclass".equals(str)) {
+                    return "jobjectArray";
+                } else {
+                    return str + "Array";
+                }
+            }
+            return "jobject"; //TODO: jthrowable
+        }
+    }
+
+    public static void generateHeader(ClassReader reader, PrintWriter output) {
+        output.println("/* DO NOT EDIT THIS FILE - it is machine generated */");
+        output.println("#include <jni.h>");
+
+        Generator generator = new Generator();
+        reader.accept(generator, ClassReader.SKIP_CODE | ClassReader.SKIP_DEBUG | ClassReader.SKIP_FRAMES);
+
+        StringBuilder builder = new StringBuilder();
+        String className = escape(generator.getClassName());
+
+        output.println("/* Header for class " + className + " */");
+
+        String includeHeader = "_Include_" + className;
+        output.println("#ifndef " + includeHeader);
+        output.println("#define " + includeHeader);
+
+        output.println("#ifdef __cplusplus\n" +
+                "extern \"C\" {\n" +
+                "#endif");
+
+        for (Map.Entry<String, Set<MethodDesc>> entry : generator.getMethods().entrySet()) {
+            boolean overload = entry.getValue().size() > 1;
+            for (MethodDesc desc : entry.getValue()) {
+                String methodName = escape(entry.getKey());
+                output.println("/*" + "\n" +
+                        " * Class:     " + className + "\n" +
+                        " * Method:    " + entry.getKey() + "\n" +
+                        " * Signature: " + desc.descriptor + "\n" +
+                        " */"
+                );
+
+                Type[] argTypes = Type.getArgumentTypes(desc.descriptor);
+                Type retType = Type.getReturnType(desc.descriptor);
+
+                output.print(
+                        "JNIEXPORT " + typeToNative(retType) + " JNICALL Java_" + className + "_" + methodName
+                );
+
+                if (overload) {
+                    output.print("__");
+                    for (Type tpe : argTypes) {
+                        output.print(escape(tpe.toString()));
+                    }
+                }
+                output.println();
+
+                output.print("  (JNIEnv *, ");
+                if (desc.isStatic) {
+                    output.print("jclass");
+                } else {
+                    output.print("jobject");
+                }
+                for (Type tpe : argTypes) {
+                    output.print(", " + typeToNative(tpe));
+                }
+                output.println(");\n");
+            }
+
+        }
+
+        output.println("#ifdef __cplusplus\n" +
+                "}\n" +
+                "#endif\n" +
+                "#endif\n");
+
+    }
+
+    public static void generateHeader(byte[] classFile, PrintWriter output) {
+        generateHeader(new ClassReader(classFile), output);
+    }
+
+    public static void generateHeader(byte[] classFileBuffer, int classFileOffset, int classFileLength, PrintWriter output) {
+        generateHeader(new ClassReader(classFileBuffer, classFileOffset, classFileLength), output);
+    }
+
+    public static void generateHeader(String className, PrintWriter output) throws IOException {
+        generateHeader(new ClassReader(className), output);
+    }
+
+    public static void generateHeader(InputStream input, PrintWriter output) throws IOException {
+        generateHeader(new ClassReader(input), output);
+    }
+
+    public static void main(String[] args) throws IOException {
+        File f = new File(args[0]);
+        PrintWriter writer = new PrintWriter(System.out);
+        generateHeader(new FileInputStream(f), writer);
+        writer.flush();
+    }
+}
+
+class MethodDesc {
+    public final boolean isStatic;
+    public final String descriptor;
+
+    public MethodDesc(boolean isStatic, String descriptor) {
+        this.isStatic = isStatic;
+        this.descriptor = descriptor;
+    }
+}
+
+class Generator extends ClassVisitor {
+    private String className;
+
+    private Map<String, Set<MethodDesc>> methods = new LinkedHashMap<String, Set<MethodDesc>>();
+
+    public Generator() {
+        super(Opcodes.ASM5);
+    }
+
+    @Override
+    public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
+        className = name;
+    }
+
+    @Override
+    public MethodVisitor visitMethod(int access, String name, String descriptor, String signature, String[] exceptions) {
+        if ((access & Opcodes.ACC_NATIVE) != 0) {
+            if (methods.containsKey(name)) {
+                methods.get(name).add(new MethodDesc((access & Opcodes.ACC_STATIC) != 0, descriptor));
+            } else {
+                LinkedHashSet<MethodDesc> set = new LinkedHashSet<MethodDesc>();
+                set.add(new MethodDesc((access & Opcodes.ACC_STATIC) != 0, descriptor));
+                methods.put(name, set);
+            }
+        }
+        return null;
+    }
+
+    public String getClassName() {
+        return className;
+    }
+
+    public Map<String, Set<MethodDesc>> getMethods() {
+        return methods;
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/org/glavo/javah/HeaderGeneratorTest.java b/src/test/java/org/glavo/javah/HeaderGeneratorTest.java
new file mode 100644
index 0000000..97e3e33
--- /dev/null
+++ b/src/test/java/org/glavo/javah/HeaderGeneratorTest.java
@@ -0,0 +1,14 @@
+package org.glavo.javah;
+
+import org.junit.Test;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+
+public class HeaderGeneratorTest {
+    public static void main(String[] args) throws IOException {
+        PrintWriter writer = new PrintWriter(System.out);
+        HeaderGenerator.generateHeader("java.lang.System", writer);
+        writer.flush();
+    }
+}