Android SQLite NDK native driver (...)

Provides Android NDK build of sqlite3 (http://sqlite.org/, public domain) with a low-level JNI interface accessible from static methods of SQLiteNDKNativeDriver class along with the following extra features: REGEXP, BASE64 ... Intended for use with: brodybits / android-sqlite-native-ndk-connector

Based on:

• liteglue / Android-sqlite-native-driver
• sqlg / SQLiteGlue-core

by Christopher J. Brody aka Chris Brody mailto: chris.brody+brodybits@gmail.com

with some complex API response type enhancements by Luis Silva of OutSystems (luis dot silva at outsystems dot com)

LICENSE: Unlicense (unlicense.org) (public domain)

About

provides the following items:

• SQLiteNDKNativeDriver class with native Java interface to an important subset of sqlite3 C functions
• SQLiteNativeResponse class with complex API response type
• automatic build of sqlite-ndk-native-driver.jar and sqlite-ndk-native-driver-libs.zip with sqlite3 component for major Android NDK targets (armeabi-v7a / x86 / x86_64 / arm64-v8a), with sqlite3 component along with the following user defined functions:
  • REGEXP integrated from brodybits / sqlite3-regexp-cached (based on http://git.altlinux.org/people/at/packages/?p=sqlite3-pcre.git by Alexey Tourbin, public domain)
  • BASE64 and BLOBFROMBASE64 integrated from brodybits / sqlite3-base64, using brodybits / libb64-core (based on http://libb64.sourceforge.net/ by Chris Venter, public domain)

This was accomplished with some help from using GlueGen around a simple wrapper C module.

This project is meant to help build a higher-level sqlite interface library, with the JNI layer completely isolated.

Minimum API level: android-22 (Android 5.1)

NOTE: This project references multiple subprojects, which may be resolved by: $ make init (as described below).

WARNING: The SQLite database and statement handles that are returned in SQLiteNativeResponse are raw C pointer values. If someone uses a database or statement handle that is not valid, or no longer valid then the behavior would be undefined (may crash, for example). It is not recommended to use the API directly without understanding of how this library works internally.

SQLite build information

SQLite version

3.32.3

android-ndk version notes

See the following reference for installing older android-ndk cask using Homebrew: https://www.jverdeyen.be/mac/downgrade-brew-cask-application/

To install android-ndk version r16b, for example:

brew cask install https://raw.githubusercontent.com/Homebrew/homebrew-cask/4570652dc6a3a8f7fd2be1053dd43547a2c78e26/Casks/android-ndk.rb

Note that homebrew-cask seems to have restored maintenance of the android-ndk cask, as discussed in Homebrew/homebrew-cask#58883.

See also for some historical android-ndk cask information:

• https://github.com/Homebrew/homebrew-cask/commits/master/Casks/android-ndk.rb
• https://github.com/Homebrew/homebrew-cask/commits/5e9f77552aef2ffa29efe8a9b916d89686b96c7f/Casks/android-ndk.rb
• https://github.com/Homebrew/homebrew-cask/blob/5e9f77552aef2ffa29efe8a9b916d89686b96c7f/Casks/android-ndk.rb

FUTURE TODO: better documentation of API and some internal details

SQLite build flags

• -DSQLITE_THREADSAFE=1
• -DSQLITE_DEFAULT_SYNCHRONOUS=3
• -DSQLITE_DEFAULT_MEMSTATUS=0
• -DSQLITE_OMIT_DECLTYPE
• -DSQLITE_OMIT_DEPRECATED
• -DSQLITE_OMIT_PROGRESS_CALLBACK
• -DSQLITE_OMIT_SHARED_CACHE
• -DSQLITE_TEMP_STORE=2
• -DSQLITE_OMIT_LOAD_EXTENSION
• -DSQLITE_ENABLE_FTS3
• -DSQLITE_ENABLE_FTS3_PARENTHESIS
• -DSQLITE_ENABLE_FTS4
• -DSQLITE_ENABLE_FTS5
• -DSQLITE_ENABLE_RTREE
• -DSQLITE_ENABLE_JSON1

New stable default page size and cache size (https://sqlite.org/pgszchng2016.html):

• -DSQLITE_DEFAULT_PAGE_SIZE=4096
• -DSQLITE_DEFAULT_CACHE_SIZE=-2000

Dependencies

• SQLite (https://sqlite.org/) - public domain
• brodybits / sqlite3-regexp-cached - based on http://git.altlinux.org/people/at/packages/?p=sqlite3-pcre.git by Alexey Tourbin, public domain
• brodybits / sqlite3-base64 - Unlicense (public domain) ref: http://unlicense.org/
• brodybits / libb64-core - based on http://libb64.sourceforge.net/ by Chris Venter, public domain

Major TODOs and limitations

• Automatic AAR build
• Document this project (again, perhaps in a blog post)
• Some more SQLite API functions will be needed to rebuild the native sqlcipher library to replace the native libraries in the @sqlcipher / android-database-sqlcipher (SQLCipher for Android) project.

Building

Normal build

Initialize with the gluegentools and sqlite-amalgamation subprojects:

$ make init

Then to build:

$ make

Regenerage Java & C glue code

$ make regen

Testing

Tested with: brodybits / android-sqlite-native-ndk-connector