refactor: delete sqlite
This commit is contained in:
Richard Ramos
RichΛrd
parent
fa7d2ba26f
commit
56499026f7
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libcrypto.a
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openssl-1.1.1g.tar.gz
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openssl-1.1.1g
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sqlite3.a
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sqlcipher
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main
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myDatabase
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SHELL := bash
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build:
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nim c -l:lib/sqlite3.a -L:-lm -l:lib/libcrypto.a --threads --outdir:. main.nim
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113
sqlite/README.md
113
sqlite/README.md
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SQLCipher - Nim / NOTES
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===
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### A SQLCipher wrapper is being implemented at https://github.com/status-im/nim-sqlcipher
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**Notes:**
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This is a experimental project to test how to use SQLCipher with Nim. I tried to use [c2nim](https://github.com/nim-lang/c2nim) to generate a small wrapper for SQLite using the header file generated during the SQLCipher compilation process but I wasn't successful. Someone please try using that software to see if it works for them
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I ended up using, [Tiny_SQLite](https://github.com/GULPF/tiny_sqlite/blob/master/src/tiny_sqlite/sqlite_wrapper.nim) because it already provides a wrapper for SQLite. It assumes SQLite is dynamically linked so I changed it to static linking so I can use it with the compiled SQLCipher and added new functions.
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```nim
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# In sqlite_wrapper.nim
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proc key*(db: PSqlite3, pKey: cstring, nKey: int32): int32{.cdecl, importc: "sqlite3_key".}
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proc rekey*(db: PSqlite3, pKey: cstring, nKey: int32): int32{.cdecl, importc: "sqlite3_rekey".}
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# In tiny_sqlite.nim
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proc key*(db: DbConn, password: string) =
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let rc = sqlite.key(db, password, int32(password.len))
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db.checkRc(rc)
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proc rekey*(db: DbConn, password: string) =
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let rc = sqlite.rekey(db, password, int32(password.len))
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db.checkRc(rc)
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```
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We can either fork this library, or create a new .nim file with the required functions, and use Tiny_SQLite along with the SQLCipher specific functions. Docs for Tiny_SQLite are available here: https://gulpf.github.io/tiny_sqlite/tiny_sqlite.html
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### Statically Linked OpenSSL
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There are some implications: gclib should be installed in the OS that will run the static linked. This is probably an non-issue. Ubuntu is providing this lib since 2013. It might be the same for other operative systems
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```
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rm -rf lib
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mkdir lib
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# Compiling libcrypto.o
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wget https://www.openssl.org/source/openssl-1.1.1g.tar.gz
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tar -zxvf openssl-1.1.1g.tar.gz
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rm openssl-1.1.1g.tar.gz
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cd openssl-1.1.1g/
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./config -shared
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make -j`nproc`
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cp libcrypto.a ../lib/.
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cd ..
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rm -rf openssl-1.1.1g/
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# Generating sqlite3.c
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git clone https://github.com/sqlcipher/sqlcipher.git
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cd sqlcipher/
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./configure --enable-tempstore=yes CFLAGS="-DSQLITE_HAS_CODEC" LDFLAGS="../lib/libcrypto.a"
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make sqlite3.c
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cp sqlite3.c ../lib/.
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cd ..
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rm -rf sqlcipher
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# Compiling sqlite3.c
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gcc -lpthread -DSQLITE_HAS_CODEC -L./lib/libcrypto.a -c ./lib/sqlite3.c -o ./lib/sqlite3.a
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rm ./lib/sqlite3.c
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```
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## Compile / Run
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```
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make build
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./main
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```
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This will ask for a passwd to encrypt/decrypt the DB. and then insert a timestamp in a table, and select all records from that table.
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## Dynamic linking
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Depends on the requirements / security considerations. It assumes `libssl-dev` is installed in Ubuntu, and will do a dynamic linking: the final user will have to install openssl before running the executable.
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```
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sudo apt install libssl-dev
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```
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```
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rm -rf lib
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mkdir lib
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# Generating sqlite3.c
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git clone https://github.com/sqlcipher/sqlcipher.git
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cd sqlcipher/
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./configure --enable-tempstore=yes CFLAGS="-DSQLITE_HAS_CODEC" LDFLAGS="-lcrypto"
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make sqlite3.c
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cp sqlite3.c ../lib/.
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cd ..
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rm -rf sqlcipher
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#Compiling sqlite3.c**
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gcc -lpthread -DSQLITE_HAS_CODEC -lcrypto -c ./lib/sqlite3.c -o ./lib/sqlite3.a
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rm ./lib/sqlite3.c
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```
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The build command changes:
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```
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nim c -d:release -L:./lib/sqlite3.a -L:-lm -L:"-lcrypto" --threads --outdir:. main.nim
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./main
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```
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import tiny_sqlite
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import times
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import strformat
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when isMainModule:
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let db: DbConn = openDatabase("./myDatabase")
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write(stdout, "Enter the db password> ")
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let passwd = readLine(stdin)
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key(db, passwd)
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execScript(db, "create table if not exists Log (theTime text primary key)")
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let date = getDateStr(now())
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let time = getClockStr(now())
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execScript(db, &"""insert into Log values("{date}:{time}")""")
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echo rows(db, "select * from Log")
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const
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SQLITE_INTEGER* = 1
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SQLITE_FLOAT* = 2
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SQLITE_BLOB* = 4
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SQLITE_NULL* = 5
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SQLITE_TEXT* = 3
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SQLITE_UTF8* = 1
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SQLITE_UTF16LE* = 2
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SQLITE_UTF16BE* = 3 # Use native byte order
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SQLITE_UTF16* = 4 # sqlite3_create_function only
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SQLITE_ANY* = 5 #sqlite_exec return values
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SQLITE_OK* = 0
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SQLITE_ERROR* = 1 # SQL error or missing database
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SQLITE_INTERNAL* = 2 # An internal logic error in SQLite
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SQLITE_PERM* = 3 # Access permission denied
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SQLITE_ABORT* = 4 # Callback routine requested an abort
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SQLITE_BUSY* = 5 # The database file is locked
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SQLITE_LOCKED* = 6 # A table in the database is locked
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SQLITE_NOMEM* = 7 # A malloc() failed
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SQLITE_READONLY* = 8 # Attempt to write a readonly database
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SQLITE_INTERRUPT* = 9 # Operation terminated by sqlite3_interrupt()
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SQLITE_IOERR* = 10 # Some kind of disk I/O error occurred
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SQLITE_CORRUPT* = 11 # The database disk image is malformed
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SQLITE_NOTFOUND* = 12 # (Internal Only) Table or record not found
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SQLITE_FULL* = 13 # Insertion failed because database is full
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SQLITE_CANTOPEN* = 14 # Unable to open the database file
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SQLITE_PROTOCOL* = 15 # Database lock protocol error
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SQLITE_EMPTY* = 16 # Database is empty
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SQLITE_SCHEMA* = 17 # The database schema changed
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SQLITE_TOOBIG* = 18 # Too much data for one row of a table
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SQLITE_CONSTRAINT* = 19 # Abort due to contraint violation
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SQLITE_MISMATCH* = 20 # Data type mismatch
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SQLITE_MISUSE* = 21 # Library used incorrectly
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SQLITE_NOLFS* = 22 # Uses OS features not supported on host
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SQLITE_AUTH* = 23 # Authorization denied
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SQLITE_FORMAT* = 24 # Auxiliary database format error
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SQLITE_RANGE* = 25 # 2nd parameter to sqlite3_bind out of range
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SQLITE_NOTADB* = 26 # File opened that is not a database file
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SQLITE_ROW* = 100 # sqlite3_step() has another row ready
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SQLITE_DONE* = 101 # sqlite3_step() has finished executing
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SQLITE_COPY* = 0
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SQLITE_CREATE_INDEX* = 1
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SQLITE_CREATE_TABLE* = 2
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SQLITE_CREATE_TEMP_INDEX* = 3
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SQLITE_CREATE_TEMP_TABLE* = 4
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SQLITE_CREATE_TEMP_TRIGGER* = 5
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SQLITE_CREATE_TEMP_VIEW* = 6
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SQLITE_CREATE_TRIGGER* = 7
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SQLITE_CREATE_VIEW* = 8
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SQLITE_DELETE* = 9
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SQLITE_DROP_INDEX* = 10
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SQLITE_DROP_TABLE* = 11
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SQLITE_DROP_TEMP_INDEX* = 12
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SQLITE_DROP_TEMP_TABLE* = 13
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SQLITE_DROP_TEMP_TRIGGER* = 14
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SQLITE_DROP_TEMP_VIEW* = 15
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SQLITE_DROP_TRIGGER* = 16
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SQLITE_DROP_VIEW* = 17
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SQLITE_INSERT* = 18
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SQLITE_PRAGMA* = 19
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SQLITE_READ* = 20
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SQLITE_SELECT* = 21
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SQLITE_TRANSACTION* = 22
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SQLITE_UPDATE* = 23
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SQLITE_ATTACH* = 24
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SQLITE_DETACH* = 25
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SQLITE_ALTER_TABLE* = 26
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SQLITE_REINDEX* = 27
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SQLITE_DENY* = 1
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SQLITE_IGNORE* = 2 # Original from sqlite3.h:
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#define SQLITE_STATIC ((void(*)(void *))0)
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#define SQLITE_TRANSIENT ((void(*)(void *))-1)
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SQLITE_DETERMINISTIC* = 0x800
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type
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Sqlite3 {.pure, final.} = object
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PSqlite3* = ptr Sqlite3
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PPSqlite3* = ptr PSqlite3
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Context{.pure, final.} = object
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Pcontext* = ptr Context
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Tstmt{.pure, final.} = object
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Pstmt* = ptr Tstmt
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Value{.pure, final.} = object
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Pvalue* = ptr Value
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PValueArg* = array[0..127, Pvalue]
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Callback* = proc (para1: pointer, para2: int32, para3,
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para4: cstringArray): int32{.cdecl, raises: [].}
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Tbind_destructor_func* = proc (para1: pointer){.cdecl, locks: 0, tags: [], raises: [], gcsafe.}
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Create_function_step_func* = proc (para1: Pcontext, para2: int32,
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para3: PValueArg){.cdecl.}
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Create_function_func_func* = proc (para1: Pcontext, para2: int32,
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para3: PValueArg){.cdecl.}
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Create_function_final_func* = proc (para1: Pcontext){.cdecl.}
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Result_func* = proc (para1: pointer){.cdecl.}
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Create_collation_func* = proc (para1: pointer, para2: int32, para3: pointer,
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para4: int32, para5: pointer): int32{.cdecl.}
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Collation_needed_func* = proc (para1: pointer, para2: PSqlite3, eTextRep: int32,
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para4: cstring){.cdecl.}
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const
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SQLITE_STATIC* = nil
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SQLITE_TRANSIENT* = cast[Tbind_destructor_func](-1)
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proc close*(para1: PSqlite3): int32{.cdecl, importc: "sqlite3_close".}
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proc exec*(para1: PSqlite3, sql: cstring, para3: Callback, para4: pointer,
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errmsg: var cstring): int32{.cdecl,
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importc: "sqlite3_exec".}
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proc last_insert_rowid*(para1: PSqlite3): int64{.cdecl,
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importc: "sqlite3_last_insert_rowid".}
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proc changes*(para1: PSqlite3): int32{.cdecl, importc: "sqlite3_changes".}
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proc total_changes*(para1: PSqlite3): int32{.cdecl,
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importc: "sqlite3_total_changes".}
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proc interrupt*(para1: PSqlite3){.cdecl, importc: "sqlite3_interrupt".}
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proc complete*(sql: cstring): int32{.cdecl,
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importc: "sqlite3_complete".}
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proc complete16*(sql: pointer): int32{.cdecl,
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importc: "sqlite3_complete16".}
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proc busy_handler*(para1: PSqlite3,
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para2: proc (para1: pointer, para2: int32): int32{.cdecl.},
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para3: pointer): int32{.cdecl,
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importc: "sqlite3_busy_handler".}
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proc busy_timeout*(para1: PSqlite3, ms: int32): int32{.cdecl,
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importc: "sqlite3_busy_timeout".}
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proc get_table*(para1: PSqlite3, sql: cstring, resultp: var cstringArray,
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nrow, ncolumn: var cint, errmsg: ptr cstring): int32{.cdecl,
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importc: "sqlite3_get_table".}
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proc free_table*(result: cstringArray){.cdecl,
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importc: "sqlite3_free_table".}
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# Todo: see how translate sqlite3_mprintf, sqlite3_vmprintf, sqlite3_snprintf
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# function sqlite3_mprintf(_para1:Pchar; args:array of const):Pchar;cdecl; external Sqlite3Lib name 'sqlite3_mprintf';
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proc mprintf*(para1: cstring): cstring{.cdecl, varargs,
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importc: "sqlite3_mprintf".}
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#function sqlite3_vmprintf(_para1:Pchar; _para2:va_list):Pchar;cdecl; external Sqlite3Lib name 'sqlite3_vmprintf';
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proc free*(z: cstring){.cdecl, importc: "sqlite3_free".}
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#function sqlite3_snprintf(_para1:longint; _para2:Pchar; _para3:Pchar; args:array of const):Pchar;cdecl; external Sqlite3Lib name 'sqlite3_snprintf';
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proc snprintf*(para1: int32, para2: cstring, para3: cstring): cstring{.cdecl,
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varargs, importc: "sqlite3_snprintf".}
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proc set_authorizer*(para1: PSqlite3, xAuth: proc (para1: pointer, para2: int32,
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para3: cstring, para4: cstring, para5: cstring, para6: cstring): int32{.
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cdecl.}, pUserData: pointer): int32{.cdecl,
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importc: "sqlite3_set_authorizer".}
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proc trace*(para1: PSqlite3, xTrace: proc (para1: pointer, para2: cstring){.cdecl.},
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para3: pointer): pointer{.cdecl,
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importc: "sqlite3_trace".}
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proc progress_handler*(para1: PSqlite3, para2: int32,
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para3: proc (para1: pointer): int32{.cdecl.},
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para4: pointer){.cdecl,
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importc: "sqlite3_progress_handler".}
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proc commit_hook*(para1: PSqlite3, para2: proc (para1: pointer): int32{.cdecl.},
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para3: pointer): pointer{.cdecl,
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importc: "sqlite3_commit_hook".}
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proc open*(filename: cstring, ppDb: var PSqlite3): int32{.cdecl,
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importc: "sqlite3_open".}
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proc open16*(filename: pointer, ppDb: var PSqlite3): int32{.cdecl,
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importc: "sqlite3_open16".}
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proc errcode*(db: PSqlite3): int32{.cdecl, importc: "sqlite3_errcode".}
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proc errmsg*(para1: PSqlite3): cstring{.cdecl, importc: "sqlite3_errmsg".}
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proc errmsg16*(para1: PSqlite3): pointer{.cdecl,
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importc: "sqlite3_errmsg16".}
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proc prepare*(db: PSqlite3, zSql: cstring, nBytes: int32, ppStmt: var Pstmt,
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pzTail: var cstring): int32{.cdecl,
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importc: "sqlite3_prepare".}
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proc prepare_v2*(db: PSqlite3, zSql: cstring, nByte: cint, ppStmt: var Pstmt,
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pzTail: var cstring): cint {.
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importc: "sqlite3_prepare_v2", cdecl.}
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proc prepare16*(db: PSqlite3, zSql: pointer, nBytes: int32, ppStmt: var Pstmt,
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pzTail: var pointer): int32{.cdecl,
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importc: "sqlite3_prepare16".}
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proc bind_blob*(para1: Pstmt, para2: int32, para3: pointer, n: int32,
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para5: Tbind_destructor_func): int32{.cdecl,
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importc: "sqlite3_bind_blob".}
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proc bind_double*(para1: Pstmt, para2: int32, para3: float64): int32{.cdecl,
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importc: "sqlite3_bind_double".}
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|
||||||
proc bind_int*(para1: Pstmt, para2: int32, para3: int32): int32{.cdecl,
|
|
||||||
importc: "sqlite3_bind_int".}
|
|
||||||
proc bind_int64*(para1: Pstmt, para2: int32, para3: int64): int32{.cdecl,
|
|
||||||
importc: "sqlite3_bind_int64".}
|
|
||||||
proc bind_null*(para1: Pstmt, para2: int32): int32{.cdecl,
|
|
||||||
importc: "sqlite3_bind_null".}
|
|
||||||
proc bind_text*(para1: Pstmt, para2: int32, para3: cstring, n: int32,
|
|
||||||
para5: Tbind_destructor_func): int32{.cdecl,
|
|
||||||
importc: "sqlite3_bind_text".}
|
|
||||||
proc bind_text16*(para1: Pstmt, para2: int32, para3: pointer, para4: int32,
|
|
||||||
para5: Tbind_destructor_func): int32{.cdecl,
|
|
||||||
importc: "sqlite3_bind_text16".}
|
|
||||||
#function sqlite3_bind_value(_para1:Psqlite3_stmt; _para2:longint; _para3:Psqlite3_value):longint;cdecl; external Sqlite3Lib name 'sqlite3_bind_value';
|
|
||||||
#These overloaded functions were introduced to allow the use of SQLITE_STATIC and SQLITE_TRANSIENT
|
|
||||||
#It's the c world man ;-)
|
|
||||||
proc bind_blob*(para1: Pstmt, para2: int32, para3: pointer, n: int32,
|
|
||||||
para5: int32): int32{.cdecl,
|
|
||||||
importc: "sqlite3_bind_blob".}
|
|
||||||
proc bind_text*(para1: Pstmt, para2: int32, para3: cstring, n: int32,
|
|
||||||
para5: int32): int32{.cdecl,
|
|
||||||
importc: "sqlite3_bind_text".}
|
|
||||||
proc bind_text16*(para1: Pstmt, para2: int32, para3: pointer, para4: int32,
|
|
||||||
para5: int32): int32{.cdecl,
|
|
||||||
importc: "sqlite3_bind_text16".}
|
|
||||||
proc bind_parameter_count*(para1: Pstmt): int32{.cdecl,
|
|
||||||
importc: "sqlite3_bind_parameter_count".}
|
|
||||||
proc bind_parameter_name*(para1: Pstmt, para2: int32): cstring{.cdecl,
|
|
||||||
importc: "sqlite3_bind_parameter_name".}
|
|
||||||
proc bind_parameter_index*(para1: Pstmt, zName: cstring): int32{.cdecl,
|
|
||||||
importc: "sqlite3_bind_parameter_index".}
|
|
||||||
proc clear_bindings*(para1: Pstmt): int32 {.cdecl,
|
|
||||||
importc: "sqlite3_clear_bindings".}
|
|
||||||
proc column_count*(pStmt: Pstmt): int32{.cdecl,
|
|
||||||
importc: "sqlite3_column_count".}
|
|
||||||
proc column_name*(para1: Pstmt, para2: int32): cstring{.cdecl,
|
|
||||||
importc: "sqlite3_column_name".}
|
|
||||||
proc column_table_name*(para1: Pstmt; para2: int32): cstring{.cdecl,
|
|
||||||
importc: "sqlite3_column_table_name".}
|
|
||||||
proc column_name16*(para1: Pstmt, para2: int32): pointer{.cdecl,
|
|
||||||
importc: "sqlite3_column_name16".}
|
|
||||||
proc column_decltype*(para1: Pstmt, i: int32): cstring{.cdecl,
|
|
||||||
importc: "sqlite3_column_decltype".}
|
|
||||||
proc column_decltype16*(para1: Pstmt, para2: int32): pointer{.cdecl,
|
|
||||||
importc: "sqlite3_column_decltype16".}
|
|
||||||
proc step*(para1: Pstmt): int32{.cdecl, importc: "sqlite3_step".}
|
|
||||||
proc data_count*(pStmt: Pstmt): int32{.cdecl,
|
|
||||||
importc: "sqlite3_data_count".}
|
|
||||||
proc column_blob*(para1: Pstmt, iCol: int32): pointer{.cdecl,
|
|
||||||
importc: "sqlite3_column_blob".}
|
|
||||||
proc column_bytes*(para1: Pstmt, iCol: int32): int32{.cdecl,
|
|
||||||
importc: "sqlite3_column_bytes".}
|
|
||||||
proc column_bytes16*(para1: Pstmt, iCol: int32): int32{.cdecl,
|
|
||||||
importc: "sqlite3_column_bytes16".}
|
|
||||||
proc column_double*(para1: Pstmt, iCol: int32): float64{.cdecl,
|
|
||||||
importc: "sqlite3_column_double".}
|
|
||||||
proc column_int*(para1: Pstmt, iCol: int32): int32{.cdecl,
|
|
||||||
importc: "sqlite3_column_int".}
|
|
||||||
proc column_int64*(para1: Pstmt, iCol: int32): int64{.cdecl,
|
|
||||||
importc: "sqlite3_column_int64".}
|
|
||||||
proc column_text*(para1: Pstmt, iCol: int32): cstring{.cdecl,
|
|
||||||
importc: "sqlite3_column_text".}
|
|
||||||
proc column_text16*(para1: Pstmt, iCol: int32): pointer{.cdecl,
|
|
||||||
importc: "sqlite3_column_text16".}
|
|
||||||
proc column_type*(para1: Pstmt, iCol: int32): int32{.cdecl,
|
|
||||||
importc: "sqlite3_column_type".}
|
|
||||||
proc finalize*(pStmt: Pstmt): int32{.cdecl,
|
|
||||||
importc: "sqlite3_finalize".}
|
|
||||||
proc reset*(pStmt: Pstmt): int32{.cdecl, importc: "sqlite3_reset".}
|
|
||||||
proc create_function*(para1: PSqlite3, zFunctionName: cstring, nArg: int32,
|
|
||||||
eTextRep: int32, para5: pointer,
|
|
||||||
xFunc: Create_function_func_func,
|
|
||||||
xStep: Create_function_step_func,
|
|
||||||
xFinal: Create_function_final_func): int32{.cdecl,
|
|
||||||
importc: "sqlite3_create_function".}
|
|
||||||
proc create_function16*(para1: PSqlite3, zFunctionName: pointer, nArg: int32,
|
|
||||||
eTextRep: int32, para5: pointer,
|
|
||||||
xFunc: Create_function_func_func,
|
|
||||||
xStep: Create_function_step_func,
|
|
||||||
xFinal: Create_function_final_func): int32{.cdecl,
|
|
||||||
importc: "sqlite3_create_function16".}
|
|
||||||
proc aggregate_count*(para1: Pcontext): int32{.cdecl,
|
|
||||||
importc: "sqlite3_aggregate_count".}
|
|
||||||
proc value_blob*(para1: Pvalue): pointer{.cdecl,
|
|
||||||
importc: "sqlite3_value_blob".}
|
|
||||||
proc value_bytes*(para1: Pvalue): int32{.cdecl,
|
|
||||||
importc: "sqlite3_value_bytes".}
|
|
||||||
proc value_bytes16*(para1: Pvalue): int32{.cdecl,
|
|
||||||
importc: "sqlite3_value_bytes16".}
|
|
||||||
proc value_double*(para1: Pvalue): float64{.cdecl,
|
|
||||||
importc: "sqlite3_value_double".}
|
|
||||||
proc value_int*(para1: Pvalue): int32{.cdecl,
|
|
||||||
importc: "sqlite3_value_int".}
|
|
||||||
proc value_int64*(para1: Pvalue): int64{.cdecl,
|
|
||||||
importc: "sqlite3_value_int64".}
|
|
||||||
proc value_text*(para1: Pvalue): cstring{.cdecl,
|
|
||||||
importc: "sqlite3_value_text".}
|
|
||||||
proc value_text16*(para1: Pvalue): pointer{.cdecl,
|
|
||||||
importc: "sqlite3_value_text16".}
|
|
||||||
proc value_text16le*(para1: Pvalue): pointer{.cdecl,
|
|
||||||
importc: "sqlite3_value_text16le".}
|
|
||||||
proc value_text16be*(para1: Pvalue): pointer{.cdecl,
|
|
||||||
importc: "sqlite3_value_text16be".}
|
|
||||||
proc value_type*(para1: Pvalue): int32{.cdecl,
|
|
||||||
importc: "sqlite3_value_type".}
|
|
||||||
proc aggregate_context*(para1: Pcontext, nBytes: int32): pointer{.cdecl,
|
|
||||||
importc: "sqlite3_aggregate_context".}
|
|
||||||
proc user_data*(para1: Pcontext): pointer{.cdecl,
|
|
||||||
importc: "sqlite3_user_data".}
|
|
||||||
proc get_auxdata*(para1: Pcontext, para2: int32): pointer{.cdecl,
|
|
||||||
importc: "sqlite3_get_auxdata".}
|
|
||||||
proc set_auxdata*(para1: Pcontext, para2: int32, para3: pointer,
|
|
||||||
para4: proc (para1: pointer){.cdecl.}){.cdecl,
|
|
||||||
importc: "sqlite3_set_auxdata".}
|
|
||||||
proc result_blob*(para1: Pcontext, para2: pointer, para3: int32,
|
|
||||||
para4: Result_func){.cdecl,
|
|
||||||
importc: "sqlite3_result_blob".}
|
|
||||||
proc result_double*(para1: Pcontext, para2: float64){.cdecl,
|
|
||||||
importc: "sqlite3_result_double".}
|
|
||||||
proc result_error*(para1: Pcontext, para2: cstring, para3: int32){.cdecl,
|
|
||||||
importc: "sqlite3_result_error".}
|
|
||||||
proc result_error16*(para1: Pcontext, para2: pointer, para3: int32){.cdecl,
|
|
||||||
importc: "sqlite3_result_error16".}
|
|
||||||
proc result_int*(para1: Pcontext, para2: int32){.cdecl,
|
|
||||||
importc: "sqlite3_result_int".}
|
|
||||||
proc result_int64*(para1: Pcontext, para2: int64){.cdecl,
|
|
||||||
importc: "sqlite3_result_int64".}
|
|
||||||
proc result_null*(para1: Pcontext){.cdecl,
|
|
||||||
importc: "sqlite3_result_null".}
|
|
||||||
proc result_text*(para1: Pcontext, para2: cstring, para3: int32,
|
|
||||||
para4: Result_func){.cdecl,
|
|
||||||
importc: "sqlite3_result_text".}
|
|
||||||
proc result_text16*(para1: Pcontext, para2: pointer, para3: int32,
|
|
||||||
para4: Result_func){.cdecl,
|
|
||||||
importc: "sqlite3_result_text16".}
|
|
||||||
proc result_text16le*(para1: Pcontext, para2: pointer, para3: int32,
|
|
||||||
para4: Result_func){.cdecl,
|
|
||||||
importc: "sqlite3_result_text16le".}
|
|
||||||
proc result_text16be*(para1: Pcontext, para2: pointer, para3: int32,
|
|
||||||
para4: Result_func){.cdecl,
|
|
||||||
importc: "sqlite3_result_text16be".}
|
|
||||||
proc result_value*(para1: Pcontext, para2: Pvalue){.cdecl,
|
|
||||||
importc: "sqlite3_result_value".}
|
|
||||||
proc create_collation*(para1: PSqlite3, zName: cstring, eTextRep: int32,
|
|
||||||
para4: pointer, xCompare: Create_collation_func): int32{.
|
|
||||||
cdecl, importc: "sqlite3_create_collation".}
|
|
||||||
proc create_collation16*(para1: PSqlite3, zName: cstring, eTextRep: int32,
|
|
||||||
para4: pointer, xCompare: Create_collation_func): int32{.
|
|
||||||
cdecl, importc: "sqlite3_create_collation16".}
|
|
||||||
proc collation_needed*(para1: PSqlite3, para2: pointer, para3: Collation_needed_func): int32{.
|
|
||||||
cdecl, importc: "sqlite3_collation_needed".}
|
|
||||||
proc collation_needed16*(para1: PSqlite3, para2: pointer, para3: Collation_needed_func): int32{.
|
|
||||||
cdecl, importc: "sqlite3_collation_needed16".}
|
|
||||||
proc libversion*(): cstring{.cdecl, importc: "sqlite3_libversion".}
|
|
||||||
#Alias for allowing better code portability (win32 is not working with external variables)
|
|
||||||
proc version*(): cstring{.cdecl, importc: "sqlite3_libversion".}
|
|
||||||
# Not published functions
|
|
||||||
proc libversion_number*(): int32{.cdecl,
|
|
||||||
importc: "sqlite3_libversion_number".}
|
|
||||||
|
|
||||||
proc key*(db: PSqlite3, pKey: cstring, nKey: int32): int32{.cdecl, importc: "sqlite3_key".}
|
|
||||||
proc rekey*(db: PSqlite3, pKey: cstring, nKey: int32): int32{.cdecl, importc: "sqlite3_rekey".}
|
|
||||||
|
|
||||||
#function sqlite3_sleep(_para1:longint):longint;cdecl; external Sqlite3Lib name 'sqlite3_sleep';
|
|
||||||
#function sqlite3_expired(_para1:Psqlite3_stmt):longint;cdecl; external Sqlite3Lib name 'sqlite3_expired';
|
|
||||||
#function sqlite3_global_recover:longint;cdecl; external Sqlite3Lib name 'sqlite3_global_recover';
|
|
||||||
# implementation
|
|
||||||
|
|
||||||
proc db_handle*(para1: Pstmt): PSqlite3
|
|
||||||
{.cdecl, importc: "sqlite3_db_handle".}
|
|
||||||
|
|
||||||
proc get_autocommit*(db: PSqlite3): cint
|
|
||||||
{.cdecl, importc: "sqlite3_get_autocommit".}
|
|
||||||
|
|
||||||
const
|
|
||||||
SQLITE_OPEN_READONLY* = 0x00000001 #/* Ok for sqlite3_open_v2() */
|
|
||||||
SQLITE_OPEN_READWRITE* = 0x00000002 #/* Ok for sqlite3_open_v2() */
|
|
||||||
SQLITE_OPEN_CREATE* = 0x00000004 #/* Ok for sqlite3_open_v2() */
|
|
||||||
SQLITE_OPEN_DELETEONCLOSE* = 0x00000008 #/* VFS only */
|
|
||||||
SQLITE_OPEN_EXCLUSIVE* = 0x00000010 #/* VFS only */
|
|
||||||
SQLITE_OPEN_AUTOPROXY* = 0x00000020 #/* VFS only */
|
|
||||||
SQLITE_OPEN_URI* = 0x00000040 #/* Ok for sqlite3_open_v2() */
|
|
||||||
SQLITE_OPEN_MEMORY* = 0x00000080 #/* Ok for sqlite3_open_v2() */
|
|
||||||
SQLITE_OPEN_MAIN_DB* = 0x00000100 #/* VFS only */
|
|
||||||
SQLITE_OPEN_TEMP_DB* = 0x00000200 #/* VFS only */
|
|
||||||
SQLITE_OPEN_TRANSIENT_DB* = 0x00000400 #/* VFS only */
|
|
||||||
SQLITE_OPEN_MAIN_JOURNAL* = 0x00000800 #/* VFS only */
|
|
||||||
SQLITE_OPEN_TEMP_JOURNAL* = 0x00001000 #/* VFS only */
|
|
||||||
SQLITE_OPEN_SUBJOURNAL* = 0x00002000 #/* VFS only */
|
|
||||||
SQLITE_OPEN_MASTER_JOURNAL* = 0x00004000 #/* VFS only */
|
|
||||||
SQLITE_OPEN_NOMUTEX* = 0x00008000 #/* Ok for sqlite3_open_v2() */
|
|
||||||
SQLITE_OPEN_FULLMUTEX* = 0x00010000 #/* Ok for sqlite3_open_v2() */
|
|
||||||
SQLITE_OPEN_SHAREDCACHE* = 0x00020000 #/* Ok for sqlite3_open_v2() */
|
|
||||||
SQLITE_OPEN_PRIVATECACHE* = 0x00040000 #/* Ok for sqlite3_open_v2() */
|
|
||||||
SQLITE_OPEN_WAL* = 0x00080000 #/* VFS only */
|
|
||||||
|
|
||||||
proc open_v2*(filename: cstring, ppDb : var PSqlite3,
|
|
||||||
flags : int32 , zVfsName : cstring ): int32 {.
|
|
||||||
cdecl,importc: "sqlite3_open_v2".}
|
|
||||||
|
|
||||||
proc db_readonly*(ppDb: PSqlite3, dbname : cstring): int32 {.
|
|
||||||
cdecl,importc: "sqlite3_db_readonly".}
|
|
||||||
|
|
@ -1,284 +0,0 @@
|
||||||
import std / [strutils, options, macros, typetraits]
|
|
||||||
from sqlite_wrapper as sqlite import nil
|
|
||||||
|
|
||||||
type
|
|
||||||
DbConn* = sqlite.PSqlite3 ## \
|
|
||||||
## Encapsulates a database connection.
|
|
||||||
## Note that this is just an alias for `sqlite_wrapper.PSqlite3`.
|
|
||||||
|
|
||||||
PreparedSql = sqlite.Pstmt
|
|
||||||
|
|
||||||
DbMode* = enum
|
|
||||||
dbRead,
|
|
||||||
dbReadWrite
|
|
||||||
|
|
||||||
SqliteError* = object of CatchableError ## \
|
|
||||||
## Raised when an error in the underlying SQLite library
|
|
||||||
## occurs.
|
|
||||||
errorCode*: int32 ## \
|
|
||||||
## This is the error code that was returned by the underlying
|
|
||||||
## SQLite library. Constants for the different possible
|
|
||||||
## values of this field exists in the
|
|
||||||
## ``tiny_sqlite/sqlite_wrapper`` module.
|
|
||||||
|
|
||||||
DbValueKind* = enum ## \
|
|
||||||
## Enum of all possible value types in a Sqlite database.
|
|
||||||
sqliteNull,
|
|
||||||
sqliteInteger,
|
|
||||||
sqliteReal,
|
|
||||||
sqliteText,
|
|
||||||
sqliteBlob
|
|
||||||
|
|
||||||
DbValue* = object ## \
|
|
||||||
## Represents a value in a SQLite database.
|
|
||||||
case kind*: DbValueKind
|
|
||||||
of sqliteInteger:
|
|
||||||
intVal*: int64
|
|
||||||
of sqliteReal:
|
|
||||||
floatVal*: float64
|
|
||||||
of sqliteText:
|
|
||||||
strVal*: string
|
|
||||||
of sqliteBlob:
|
|
||||||
blobVal*: seq[byte]
|
|
||||||
of sqliteNull:
|
|
||||||
discard
|
|
||||||
|
|
||||||
proc newSqliteError(db: DbConn, errorCode: int32): ref SqliteError =
|
|
||||||
## Raises a SqliteError exception.
|
|
||||||
(ref SqliteError)(
|
|
||||||
msg: $sqlite.errmsg(db),
|
|
||||||
errorCode: errorCode
|
|
||||||
)
|
|
||||||
|
|
||||||
template checkRc(db: DbConn, rc: int32) =
|
|
||||||
if rc != sqlite.SQLITE_OK:
|
|
||||||
raise newSqliteError(db, rc)
|
|
||||||
|
|
||||||
proc prepareSql(db: DbConn, sql: string, params: seq[DbValue]): PreparedSql
|
|
||||||
{.raises: [SqliteError].} =
|
|
||||||
var tail: cstring
|
|
||||||
let rc = sqlite.prepare_v2(db, sql.cstring, sql.len.cint, result, tail)
|
|
||||||
assert tail.len == 0,
|
|
||||||
"`exec` and `execMany` can only be used with a single SQL statement. " &
|
|
||||||
"To execute several SQL statements, use `execScript`"
|
|
||||||
db.checkRc(rc)
|
|
||||||
|
|
||||||
var idx = 1'i32
|
|
||||||
for value in params:
|
|
||||||
let rc =
|
|
||||||
case value.kind
|
|
||||||
of sqliteNull: sqlite.bind_null(result, idx)
|
|
||||||
of sqliteInteger: sqlite.bind_int64(result, idx, value.intval)
|
|
||||||
of sqliteReal: sqlite.bind_double(result, idx, value.floatVal)
|
|
||||||
of sqliteText: sqlite.bind_text(result, idx, value.strVal.cstring,
|
|
||||||
value.strVal.len.int32, sqlite.SQLITE_TRANSIENT)
|
|
||||||
of sqliteBlob: sqlite.bind_blob(result, idx.int32,
|
|
||||||
cast[string](value.blobVal).cstring,
|
|
||||||
value.blobVal.len.int32, sqlite.SQLITE_TRANSIENT)
|
|
||||||
|
|
||||||
sqlite.db_handle(result).checkRc(rc)
|
|
||||||
idx.inc
|
|
||||||
|
|
||||||
proc next(prepared: PreparedSql): bool =
|
|
||||||
## Advance cursor by one row.
|
|
||||||
## Return ``true`` if there are more rows.
|
|
||||||
let rc = sqlite.step(prepared)
|
|
||||||
if rc == sqlite.SQLITE_ROW:
|
|
||||||
result = true
|
|
||||||
elif rc == sqlite.SQLITE_DONE:
|
|
||||||
result = false
|
|
||||||
else:
|
|
||||||
raise newSqliteError(sqlite.db_handle(prepared), rc)
|
|
||||||
|
|
||||||
proc finalize(prepared: PreparedSql) =
|
|
||||||
## Finalize statement or raise SqliteError if not successful.
|
|
||||||
let rc = sqlite.finalize(prepared)
|
|
||||||
sqlite.db_handle(prepared).checkRc(rc)
|
|
||||||
|
|
||||||
proc toDbValue*[T: Ordinal](val: T): DbValue =
|
|
||||||
DbValue(kind: sqliteInteger, intVal: val.int64)
|
|
||||||
|
|
||||||
proc toDbValue*[T: SomeFloat](val: T): DbValue =
|
|
||||||
DbValue(kind: sqliteReal, floatVal: val)
|
|
||||||
|
|
||||||
proc toDbValue*[T: string](val: T): DbValue =
|
|
||||||
DbValue(kind: sqliteText, strVal: val)
|
|
||||||
|
|
||||||
proc toDbValue*[T: seq[byte]](val: T): DbValue =
|
|
||||||
DbValue(kind: sqliteBlob, blobVal: val)
|
|
||||||
|
|
||||||
proc toDbValue*[T: Option](val: T): DbValue =
|
|
||||||
if val.isNone:
|
|
||||||
DbValue(kind: sqliteNull)
|
|
||||||
else:
|
|
||||||
toDbValue(val.get)
|
|
||||||
|
|
||||||
when (NimMajor, NimMinor, NimPatch) > (0, 19, 9):
|
|
||||||
proc toDbValue*[T: type(nil)](val: T): DbValue =
|
|
||||||
DbValue(kind: sqliteNull)
|
|
||||||
|
|
||||||
proc nilDbValue(): DbValue =
|
|
||||||
## Since above isn't available for older versions,
|
|
||||||
## we use this internally.
|
|
||||||
DbValue(kind: sqliteNull)
|
|
||||||
|
|
||||||
proc fromDbValue*(val: DbValue, T: typedesc[Ordinal]): T = val.intval.T
|
|
||||||
|
|
||||||
proc fromDbValue*(val: DbValue, T: typedesc[SomeFloat]): float64 = val.floatVal
|
|
||||||
|
|
||||||
proc fromDbValue*(val: DbValue, T: typedesc[string]): string = val.strVal
|
|
||||||
|
|
||||||
proc fromDbValue*(val: DbValue, T: typedesc[seq[byte]]): seq[byte] = val.blobVal
|
|
||||||
|
|
||||||
proc fromDbValue*(val: DbValue, T: typedesc[DbValue]): T = val
|
|
||||||
|
|
||||||
proc fromDbValue*[T](val: DbValue, _: typedesc[Option[T]]): Option[T] =
|
|
||||||
if val.kind == sqliteNull:
|
|
||||||
none(T)
|
|
||||||
else:
|
|
||||||
some(val.fromDbValue(T))
|
|
||||||
|
|
||||||
proc unpack*[T: tuple](row: openArray[DbValue], _: typedesc[T]): T =
|
|
||||||
## Call ``fromDbValue`` on each element of ``row`` and return it
|
|
||||||
## as a tuple.
|
|
||||||
var idx = 0
|
|
||||||
for value in result.fields:
|
|
||||||
value = row[idx].fromDbValue(type(value))
|
|
||||||
idx.inc
|
|
||||||
|
|
||||||
proc `$`*(dbVal: DbValue): string =
|
|
||||||
result.add "DbValue["
|
|
||||||
case dbVal.kind
|
|
||||||
of sqliteInteger: result.add $dbVal.intVal
|
|
||||||
of sqliteReal: result.add $dbVal.floatVal
|
|
||||||
of sqliteText: result.addQuoted dbVal.strVal
|
|
||||||
of sqliteBlob: result.add "<blob>"
|
|
||||||
of sqliteNull: result.add "nil"
|
|
||||||
result.add "]"
|
|
||||||
|
|
||||||
proc exec*(db: DbConn, sql: string, params: varargs[DbValue, toDbValue]) =
|
|
||||||
## Executes ``sql`` and raises SqliteError if not successful.
|
|
||||||
assert (not db.isNil), "Database is nil"
|
|
||||||
let prepared = db.prepareSql(sql, @params)
|
|
||||||
defer: prepared.finalize()
|
|
||||||
discard prepared.next
|
|
||||||
|
|
||||||
proc execMany*(db: DbConn, sql: string, params: seq[seq[DbValue]]) =
|
|
||||||
## Executes ``sql`` repeatedly using each element of ``params`` as parameters.
|
|
||||||
assert (not db.isNil), "Database is nil"
|
|
||||||
for p in params:
|
|
||||||
db.exec(sql, p)
|
|
||||||
|
|
||||||
proc execScript*(db: DbConn, sql: string) =
|
|
||||||
## Executes the query and raises SqliteError if not successful.
|
|
||||||
assert (not db.isNil), "Database is nil"
|
|
||||||
let rc = sqlite.exec(db, sql.cstring, cast[sqlite.Callback](nil), nil,
|
|
||||||
cast[var cstring](nil))
|
|
||||||
db.checkRc(rc)
|
|
||||||
|
|
||||||
template transaction*(db: DbConn, body: untyped) =
|
|
||||||
db.exec("BEGIN")
|
|
||||||
var ok = true
|
|
||||||
try:
|
|
||||||
try:
|
|
||||||
body
|
|
||||||
except Exception as ex:
|
|
||||||
ok = false
|
|
||||||
db.exec("ROLLBACK")
|
|
||||||
raise ex
|
|
||||||
finally:
|
|
||||||
if ok:
|
|
||||||
db.exec("COMMIT")
|
|
||||||
|
|
||||||
proc readColumn(prepared: PreparedSql, col: int32): DbValue =
|
|
||||||
let columnType = sqlite.column_type(prepared, col)
|
|
||||||
case columnType
|
|
||||||
of sqlite.SQLITE_INTEGER:
|
|
||||||
result = toDbValue(sqlite.column_int64(prepared, col))
|
|
||||||
of sqlite.SQLITE_FLOAT:
|
|
||||||
result = toDbValue(sqlite.column_double(prepared, col))
|
|
||||||
of sqlite.SQLITE_TEXT:
|
|
||||||
result = toDbValue($sqlite.column_text(prepared, col))
|
|
||||||
of sqlite.SQLITE_BLOB:
|
|
||||||
let blob = sqlite.column_blob(prepared, col)
|
|
||||||
let bytes = sqlite.column_bytes(prepared, col)
|
|
||||||
var s = newSeq[byte](bytes)
|
|
||||||
if bytes != 0:
|
|
||||||
copyMem(addr(s[0]), blob, bytes)
|
|
||||||
result = toDbValue(s)
|
|
||||||
of sqlite.SQLITE_NULL:
|
|
||||||
result = nilDbValue()
|
|
||||||
else:
|
|
||||||
raiseAssert "Unexpected column type: " & $columnType
|
|
||||||
|
|
||||||
iterator rows*(db: DbConn, sql: string,
|
|
||||||
params: varargs[DbValue, toDbValue]): seq[DbValue] =
|
|
||||||
## Executes the query and iterates over the result dataset.
|
|
||||||
assert (not db.isNil), "Database is nil"
|
|
||||||
let prepared = db.prepareSql(sql, @params)
|
|
||||||
defer: prepared.finalize()
|
|
||||||
|
|
||||||
var row = newSeq[DbValue](sqlite.column_count(prepared))
|
|
||||||
while prepared.next:
|
|
||||||
for col, _ in row:
|
|
||||||
row[col] = readColumn(prepared, col.int32)
|
|
||||||
yield row
|
|
||||||
|
|
||||||
proc rows*(db: DbConn, sql: string,
|
|
||||||
params: varargs[DbValue, toDbValue]): seq[seq[DbValue]] =
|
|
||||||
## Executes the query and returns the resulting rows.
|
|
||||||
for row in db.rows(sql, params):
|
|
||||||
result.add row
|
|
||||||
|
|
||||||
proc openDatabase*(path: string, mode = dbReadWrite): DbConn =
|
|
||||||
## Open a new database connection to a database file. To create a
|
|
||||||
## in-memory database the special path `":memory:"` can be used.
|
|
||||||
## If the database doesn't already exist and ``mode`` is ``dbReadWrite``,
|
|
||||||
## the database will be created. If the database doesn't exist and ``mode``
|
|
||||||
## is ``dbRead``, a ``SqliteError`` exception will be raised.
|
|
||||||
##
|
|
||||||
## NOTE: To avoid memory leaks, ``db.close`` must be called when the
|
|
||||||
## database connection is no longer needed.
|
|
||||||
runnableExamples:
|
|
||||||
let memDb = openDatabase(":memory:")
|
|
||||||
case mode
|
|
||||||
of dbReadWrite:
|
|
||||||
let rc = sqlite.open(path, result)
|
|
||||||
result.checkRc(rc)
|
|
||||||
of dbRead:
|
|
||||||
let rc = sqlite.open_v2(path, result, sqlite.SQLITE_OPEN_READONLY, nil)
|
|
||||||
result.checkRc(rc)
|
|
||||||
|
|
||||||
proc key*(db: DbConn, password: string) =
|
|
||||||
let rc = sqlite.key(db, password, int32(password.len))
|
|
||||||
db.checkRc(rc)
|
|
||||||
|
|
||||||
proc rekey*(db: DbConn, password: string) =
|
|
||||||
let rc = sqlite.rekey(db, password, int32(password.len))
|
|
||||||
db.checkRc(rc)
|
|
||||||
|
|
||||||
proc close*(db: DbConn) =
|
|
||||||
## Closes the database connection.
|
|
||||||
let rc = sqlite.close(db)
|
|
||||||
db.checkRc(rc)
|
|
||||||
|
|
||||||
proc lastInsertRowId*(db: DbConn): int64 =
|
|
||||||
## Get the row id of the last inserted row.
|
|
||||||
## For tables with an integer primary key,
|
|
||||||
## the row id will be the primary key.
|
|
||||||
##
|
|
||||||
## For more information, refer to the SQLite documentation
|
|
||||||
## (https://www.sqlite.org/c3ref/last_insert_rowid.html).
|
|
||||||
sqlite.last_insert_rowid(db)
|
|
||||||
|
|
||||||
proc changes*(db: DbConn): int32 =
|
|
||||||
## Get the number of changes triggered by the most recent INSERT, UPDATE or
|
|
||||||
## DELETE statement.
|
|
||||||
##
|
|
||||||
## For more information, refer to the SQLite documentation
|
|
||||||
## (https://www.sqlite.org/c3ref/changes.html).
|
|
||||||
sqlite.changes(db)
|
|
||||||
|
|
||||||
proc isReadonly*(db: DbConn): bool =
|
|
||||||
## Returns true if ``db`` is in readonly mode.
|
|
||||||
sqlite.db_readonly(db, "main") == 1
|
|
||||||
Loading…
Reference in New Issue