arielm’s gists

arielm / std::map key copy test

Last active January 3, 2016 04:49

Checking how many copies are taking place when using complex keys for maps: 1. The keys are created once, and then copied when inserted into the map. 2. The keys are not copied when std::map::find is invoked (unlike, apparently, when using Boost.bimap...)

	#include <string>
	#include <tuple>
	#include <iostream>

	struct TestObject
	{
	std::string s;
	int i;

	TestObject(const std::string &s, int i)

arielm / Boost.bimap key copying test

Created January 14, 2014 10:54

I'm using Boost.bimap for implementing a LRU cache with some "complex key" containing a string. The problem is that the key is copied every-time I'm invoking find(). I would like to avoid this un-necessary copy (and in general: make as few as possible copies of the string, maybe via templates?)

	#include <string>
	#include <iostream>

	#include <boost/bimap.hpp>
	#include <boost/bimap/list_of.hpp>
	#include <boost/bimap/set_of.hpp>

	class Test
	{
	public:

arielm / Android.mk

Last active January 3, 2016 06:59

Building ICU (common) v52.1 for Android. Blueprints from https://github.com/android/platform_external_icu4c/blob/master/common/Android.mk

	LOCAL_PATH := $(call my-dir)/..
	include $(CLEAR_VARS)

	ICU_COMMON_SRC = common

	LOCAL_C_INCLUDES += $(LOCAL_PATH)/$(ICU_COMMON_SRC)

	LOCAL_SRC_FILES += $(ICU_COMMON_SRC)/cmemory.c
	LOCAL_SRC_FILES += $(ICU_COMMON_SRC)/cstring.c
	LOCAL_SRC_FILES += $(ICU_COMMON_SRC)/cwchar.c

arielm / shared_ptr iteration.cpp

Created February 5, 2014 11:06

Avoiding un-necessary shared_ptr copy when iterating over a container. Paste code into http://www.compileonline.com/compile_cpp11_online.php for testing.

	#include <iostream>
	#include <string>
	#include <vector>
	#include <memory>

	using namespace std;

	int main()
	{
	vector<shared_ptr<string>> strings;

arielm / Android.mk

Created January 29, 2015 21:59

The path for this file should be: mozjs-31.2.0/prebuilt/spidermonkey/Android.mk

	LOCAL_PATH := $(call my-dir)
	include $(CLEAR_VARS)

	ifndef SPIDERMONKEY_SDK_PATH
	SPIDERMONKEY_SDK_PATH := $(LOCAL_PATH)/../../..
	endif

	ifndef SPIDERMONKEY_DIST_PATH
	SPIDERMONKEY_DIST_PATH := $(SPIDERMONKEY_SDK_PATH)/js/src/build-android/dist
	endif

arielm / build.sh

Created January 29, 2015 22:03

The path for this file should be: mozjs-31.2.0/js/src/build-android

	#!/bin/sh

	if [ -z $NDK_ROOT ]; then
	echo "NDK_ROOT MUST BE DEFINED!"
	echo "e.g. export NDK_ROOT=$HOME/android-ndk"
	exit -1
	fi

	host_kernel=$(uname -s \| tr "[:upper:]" "[:lower:]")
	host_arch=$(uname -m)

arielm / build_debug.sh

Created January 29, 2015 22:08

The path for this file should be: mozjs-31.2.0/js/src/build-osx

	#!/bin/sh

	cpus=$(sysctl hw.ncpu \| awk '{print $2}')

	../configure --disable-tests --disable-shared-js --enable-llvm-hacks \
	--without-intl-api \
	--disable-threadsafe \
	--enable-exact-rooting --enable-gcgenerational \
	--enable-gczeal --enable-root-analysis \
	--enable-debug --enable-debug-symbols \

arielm / build.sh

Last active February 18, 2019 05:36

TESTING EMSCRIPTEN WITH C++11 AND BOOST

	# BUILDING BOOST FOR EMSCRIPTEN...
	# REFERENCE: http://www.boost.org/doc/libs/1_58_0/more/getting_started/unix-variants.html

	# TESTED WITH: BOOST 1.53 ON OSX 10.10
	# DEPENDS ON: MODIFIED user-config.jam

	# REQUIRED FOR iostreams
	# REFERENCE: http://www.boost.org/doc/libs/1_58_0/libs/iostreams/doc/installation.html#bjam
	cd $EMSCRIPTEN_PATH; ./embuilder.py build zlib
	export NO_BZIP2=1

arielm / hello_boost.cpp

Last active August 29, 2015 14:22

	/*
	* REFERENCE: https://github.com/arielm/chronotext-boost/wiki/Basic-code-sample
	*/

	#include <iostream>

	#include <boost/algorithm/string.hpp>
	#include <boost/lexical_cast.hpp>
	#include <boost/filesystem.hpp>

arielm / anisotropy.cpp

Created September 29, 2015 20:19

Emscripten minimal test-case for showcasing issue with anisotropic filtering

	#include <GLES2/gl2.h>
	#include <GLES2/gl2ext.h>

	#include <stdio.h>
	#include <emscripten.h>
	#include <emscripten/html5.h>

	int main()
	{
	emscripten_set_canvas_size(256, 256);

Ariel Malka arielm