Add error codes to LibSQLite3::Code (#36)

src/sqlite3/lib_sqlite3.cr

@@ -7,8 +7,67 @@ lib LibSQLite3
   type SQLite3Backup = Void*
 
   enum Code
-    OKAY =   0
-    ROW  = 100
+    # Successful result
+    OKAY = 0
+    # Generic error
+    ERROR = 1
+    # Internal logic error in SQLite
+    INTERNAL = 2
+    # Access permission denied
+    PERM = 3
+    # Callback routine requested an abort
+    ABORT = 4
+    # The database file is locked
+    BUSY = 5
+    # A table in the database is locked
+    LOCKED = 6
+    # A malloc() failed
+    NOMEM = 7
+    # Attempt to write a readonly database
+    READONLY = 8
+    # Operation terminated by sqlite3_interrupt()
+    INTERRUPT = 9
+    # Some kind of disk I/O error occurred
+    IOERR = 10
+    # The database disk image is malformed
+    CORRUPT = 11
+    # Unknown opcode in sqlite3_file_control()
+    NOTFOUND = 12
+    # Insertion failed because database is full
+    FULL = 13
+    # Unable to open the database file
+    CANTOPEN = 14
+    # Database lock protocol error
+    PROTOCOL = 15
+    # Internal use only
+    EMPTY = 16
+    # The database schema changed
+    SCHEMA = 17
+    # String or BLOB exceeds size limit
+    TOOBIG = 18
+    # Abort due to constraint violation
+    CONSTRAINT = 19
+    # Data type mismatch
+    MISMATCH = 20
+    # Library used incorrectly
+    MISUSE = 21
+    # Uses OS features not supported on host
+    NOLFS = 22
+    # Authorization denied
+    AUTH = 23
+    # Not used
+    FORMAT = 24
+    # 2nd parameter to sqlite3_bind out of range
+    RANGE = 25
+    # File opened that is not a database file
+    NOTADB = 26
+    # Notifications from sqlite3_log()
+    NOTICE = 27
+    # Warnings from sqlite3_log()
+    WARNING = 28
+    # sqlite3_step() has another row ready
+    ROW = 100
+    # sqlite3_step() has finished executing
     DONE = 101
   end