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java: new helper library for the Android port

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This commit is contained in:
Max Kellermann 2014-03-01 09:19:32 +01:00
parent c73771e3ce
commit 1e06c66c77
15 changed files with 735 additions and 1 deletions
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12
Makefile.am
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@ -242,11 +242,23 @@ UPNP_SOURCES = \
if ANDROID
noinst_LIBRARIES += libjava.a
libjava_a_SOURCES = \
src/java/Class.hxx \
src/java/Exception.hxx \
src/java/Global.cxx src/java/Global.hxx \
src/java/Object.hxx \
src/java/Ref.hxx \
src/java/File.cxx src/java/File.hxx \
src/java/String.cxx src/java/String.hxx
noinst_LIBRARIES += libmain.a
libmain_a_SOURCES = \
src/Main.cxx src/Main.hxx
libmain_a_CPPFLAGS = $(AM_CPPFLAGS) -Iandroid/build/include
src_mpd_LDADD += libjava.a
all-local: android/build/bin/Main-debug.apk
clean-local:
rm -rf android/build

7
src/Main.cxx
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@ -90,6 +90,8 @@
#endif
#ifdef ANDROID
#include "java/Global.hxx"
#include "java/File.hxx"
#include "org_musicpd_Bridge.h"
#endif
@ -673,8 +675,11 @@ int mpd_main(int argc, char *argv[])
gcc_visibility_default
JNIEXPORT void JNICALL
Java_org_musicpd_Bridge_run(JNIEnv *, jclass)
Java_org_musicpd_Bridge_run(JNIEnv *env, jclass)
{
Java::Init(env);
Java::File::Initialise(env);
mpd_main(0, nullptr);
}

83
src/java/Class.hxx Normal file
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@ -0,0 +1,83 @@
/*
* Copyright (C) 2010-2011 Max Kellermann <max@duempel.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef JAVA_CLASS_HXX
#define JAVA_CLASS_HXX
#include "Ref.hxx"
#include <assert.h>
namespace Java {
/**
* Wrapper for a local "jclass" reference.
*/
class Class : public Java::LocalRef<jclass> {
public:
Class(JNIEnv *env, jclass cls)
:LocalRef<jclass>(env, cls) {}
Class(JNIEnv *env, const char *name)
:LocalRef<jclass>(env, env->FindClass(name)) {}
};
/**
* Wrapper for a global "jclass" reference.
*/
class TrivialClass : public TrivialRef<jclass> {
public:
void Find(JNIEnv *env, const char *name) {
assert(env != nullptr);
assert(name != nullptr);
jclass cls = env->FindClass(name);
assert(cls != nullptr);
Set(env, cls);
env->DeleteLocalRef(cls);
}
bool FindOptional(JNIEnv *env, const char *name) {
assert(env != nullptr);
assert(name != nullptr);
jclass cls = env->FindClass(name);
if (cls == nullptr) {
env->ExceptionClear();
return false;
}
Set(env, cls);
env->DeleteLocalRef(cls);
return true;
}
};
}
#endif

49
src/java/Exception.hxx Normal file
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@ -0,0 +1,49 @@
/*
* Copyright (C) 2010-2012 Max Kellermann <max@duempel.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef JAVA_EXCEPTION_HXX
#define JAVA_EXCEPTION_HXX
#include <jni.h>
namespace Java {
/**
* Check if an exception has occurred, and discard it.
*
* @return true if an exception was found (and discarded)
*/
static inline bool DiscardException(JNIEnv *env) {
bool result = env->ExceptionCheck();
if (result)
env->ExceptionClear();
return result;
}
}
#endif

42
src/java/File.cxx Normal file
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@ -0,0 +1,42 @@
/*
* Copyright (C) 2010-2012 Max Kellermann <max@duempel.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "File.hxx"
#include "Class.hxx"
jmethodID Java::File::getAbsolutePath_method;
void
Java::File::Initialise(JNIEnv *env)
{
Class cls(env, "java/io/File");
getAbsolutePath_method = env->GetMethodID(cls, "getAbsolutePath",
"()Ljava/lang/String;");
}

54
src/java/File.hxx Normal file
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@ -0,0 +1,54 @@
/*
* Copyright (C) 2010-2012 Max Kellermann <max@duempel.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef JAVA_FILE_HXX
#define JAVA_FILE_HPP
#include "Object.hxx"
#include <jni.h>
namespace Java {
/**
* Wrapper for a java.io.File object.
*/
class File : public LocalObject {
static jmethodID getAbsolutePath_method;
public:
static void Initialise(JNIEnv *env);
static jstring getAbsolutePath(JNIEnv *env, jobject file) {
return (jstring)env->CallObjectMethod(file,
getAbsolutePath_method);
}
};
}
#endif

39
src/java/Global.cxx Normal file
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@ -0,0 +1,39 @@
/*
* Copyright (C) 2010-2011 Max Kellermann <max@duempel.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "Global.hxx"
namespace Java {
JavaVM *jvm;
void Init(JNIEnv *env)
{
env->GetJavaVM(&jvm);
}
}

58
src/java/Global.hxx Normal file
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@ -0,0 +1,58 @@
/*
* Copyright (C) 2010-2011 Max Kellermann <max@duempel.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef JAVA_GLOBAL_HXX
#define JAVA_GLOBAL_HXX
#include "Compiler.h"
#include <jni.h>
namespace Java {
extern JavaVM *jvm;
void Init(JNIEnv *env);
static inline void
DetachCurrentThread()
{
if (jvm != nullptr)
jvm->DetachCurrentThread();
}
static inline gcc_pure
JNIEnv *GetEnv()
{
JNIEnv *env;
jvm->AttachCurrentThread(&env, nullptr);
return env;
}
}
#endif

55
src/java/Object.hxx Normal file
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@ -0,0 +1,55 @@
/*
* Copyright (C) 2010-2011 Max Kellermann <max@duempel.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef JAVA_OBJECT_HXX
#define JAVA_OBJECT_HXX
#include "Ref.hxx"
#include <jni.h>
namespace Java {
/**
* Wrapper for a local "jobject" reference.
*/
typedef LocalRef<jobject> LocalObject;
class Object : public GlobalRef<jobject> {
public:
/**
* Constructs an uninitialized object. The method
* set() must be called before it is destructed.
*/
Object() = default;
Object(JNIEnv *env, jobject obj):GlobalRef<jobject>(env, obj) {}
};
}
#endif

181
src/java/Ref.hxx Normal file
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@ -0,0 +1,181 @@
/*
* Copyright (C) 2010-2011 Max Kellermann <max@duempel.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef JAVA_REF_HXX
#define JAVA_REF_HXX
#include "Global.hxx"
#include <jni.h>
#include <assert.h>
namespace Java {
/**
* Hold a local reference on a JNI object.
*/
template<typename T>
class LocalRef {
JNIEnv *const env;
const T value;
public:
/**
* The local reference is obtained by the caller.
*/
LocalRef(JNIEnv *_env, T _value):env(_env), value(_value) {
assert(env != nullptr);
assert(value != nullptr);
}
~LocalRef() {
env->DeleteLocalRef(value);
}
LocalRef(const LocalRef &other) = delete;
LocalRef &operator=(const LocalRef &other) = delete;
T Get() const {
return value;
}
operator T() const {
return value;
}
};
/**
* Hold a global reference on a JNI object.
*/
template<typename T>
class GlobalRef {
T value;
public:
/**
* Constructs an uninitialized object. The method set() must be
* called before it is destructed.
*/
GlobalRef() = default;
GlobalRef(JNIEnv *env, T _value):value(_value) {
assert(env != nullptr);
assert(value != nullptr);
value = (T)env->NewGlobalRef(value);
}
~GlobalRef() {
GetEnv()->DeleteGlobalRef(value);
}
GlobalRef(const GlobalRef &other) = delete;
GlobalRef &operator=(const GlobalRef &other) = delete;
/**
* Sets the object, ignoring the previous value. This is only
* allowed once after the default constructor was used.
*/
void Set(JNIEnv *env, T _value) {
assert(_value != nullptr);
value = (T)env->NewGlobalRef(_value);
}
T Get() const {
return value;
}
operator T() const {
return value;
}
};
/**
* Container for a global reference to a JNI object that gets
* initialised and deinitialised explicitly. Since there is no
* implicit initialisation in the default constructor, this is a
* trivial C++ class. It should only be used for global variables
* that are implicitly initialised with zeroes.
*/
template<typename T>
class TrivialRef {
T value;
public:
constexpr TrivialRef() {};
TrivialRef(const TrivialRef &other) = delete;
TrivialRef &operator=(const TrivialRef &other) = delete;
bool IsDefined() const {
return value != nullptr;
}
/**
* Obtain a global reference on the specified object and store it.
* This object must not be set already.
*/
void Set(JNIEnv *env, T _value) {
assert(value == nullptr);
assert(_value != nullptr);
value = (T)env->NewGlobalRef(_value);
}
/**
* Release the global reference and clear this object.
*/
void Clear(JNIEnv *env) {
assert(value != nullptr);
env->DeleteGlobalRef(value);
value = nullptr;
}
/**
* Release the global reference and clear this object. It is
* allowed to call this method without ever calling Set().
*/
void ClearOptional(JNIEnv *env) {
if (value != nullptr)
Clear(env);
}
T Get() const {
return value;
}
operator T() const {
return value;
}
};
}
#endif

44
src/java/String.cxx Normal file
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@ -0,0 +1,44 @@
/*
* Copyright (C) 2010-2011 Max Kellermann <max@duempel.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "String.hxx"
#include "util/StringUtil.hxx"
char *
Java::String::CopyTo(JNIEnv *env, jstring value,
char *buffer, size_t max_size)
{
const char *p = env->GetStringUTFChars(value, nullptr);
if (p == nullptr)
return nullptr;
char *result = CopyString(buffer, p, max_size);
env->ReleaseStringUTFChars(value, p);
return result;
}

75
src/java/String.hxx Normal file
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@ -0,0 +1,75 @@
/*
* Copyright (C) 2010-2011 Max Kellermann <max@duempel.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef JAVA_STRING_HXX
#define JAVA_STRING_HXX
#include "Ref.hxx"
#include <jni.h>
#include <assert.h>
#include <stddef.h>
namespace Java {
/**
* Wrapper for a local "jstring" reference.
*/
class String : public LocalRef<jstring> {
public:
String(JNIEnv *env, jstring value)
:LocalRef<jstring>(env, value) {}
String(JNIEnv *_env, const char *_value)
:LocalRef<jstring>(_env, _env->NewStringUTF(_value)) {}
/**
* Copy the value to the specified buffer. Truncates
* the value if it does not fit into the buffer.
*
* @return a pointer to the terminating null byte,
* nullptr on error
*/
static char *CopyTo(JNIEnv *env, jstring value,
char *buffer, size_t max_size);
/**
* Copy the value to the specified buffer. Truncates
* the value if it does not fit into the buffer.
*
* @return a pointer to the terminating null byte,
* nullptr on error
*/
char *CopyTo(JNIEnv *env, char *buffer, size_t max_size) {
return CopyTo(env, Get(), buffer, max_size);
}
};
}
#endif

9
src/thread/Thread.cxx
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@ -21,6 +21,10 @@
#include "Thread.hxx"
#include "util/Error.hxx"
#ifdef ANDROID
#include "java/Global.hxx"
#endif
bool
Thread::Start(void (*_f)(void *ctx), void *_ctx, Error &error)
{
@ -102,6 +106,11 @@ Thread::ThreadProc(void *ctx)
#endif
thread.f(thread.ctx);
#ifdef ANDROID
Java::DetachCurrentThread();
#endif
return nullptr;
}

14
src/util/StringUtil.cxx
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@ -21,6 +21,8 @@
#include "CharUtil.hxx"
#include "ASCII.hxx"
#include <algorithm>
#include <assert.h>
#include <string.h>
@ -65,6 +67,18 @@ StringEndsWith(const char *haystack, const char *needle)
needle, needle_length) == 0;
}
char *
CopyString(char *gcc_restrict dest, const char *gcc_restrict src, size_t size)
{
size_t length = strlen(src);
if (length >= size)
length = size - 1;
char *p = std::copy(src, src + length, dest);
*p = '\0';
return p;
}
bool
string_array_contains(const char *const* haystack, const char *needle)
{

14
src/util/StringUtil.hxx
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@ -22,6 +22,8 @@
#include "Compiler.h"
#include <stddef.h>
/**
* Returns a pointer to the first non-whitespace character in the
* string, or to the end of the string.
@ -55,6 +57,18 @@ gcc_pure
bool
StringEndsWith(const char *haystack, const char *needle);
/**
* Copy a string. If the buffer is too small, then the string is
* truncated. This is a safer version of strncpy().
*
* @param size the size of the destination buffer (including the null
* terminator)
* @return a pointer to the null terminator
*/
gcc_nonnull_all
char *
CopyString(char *dest, const char *src, size_t size);
/**
* Checks whether a string array contains the specified string.
*