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Move Database into a separate file

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This commit is contained in:
Ivan Ukhov 2015-05-29 09:44:06 -04:00
parent 9f95b9f645
commit 1dfeee881b
2 changed files with 118 additions and 110 deletions
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80
src/database.rs Normal file
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@ -0,0 +1,80 @@
use libc::{c_char, c_int, c_void};
use raw;
use std::marker::PhantomData;
use std::path::Path;
use Result;
/// A database.
pub struct Database<'d> {
db: *mut raw::sqlite3,
_phantom: PhantomData<&'d raw::sqlite3>,
}
/// A callback executed for each row of the result of an SQL query.
pub type ExecuteCallback<'c> = FnMut(Vec<(String, String)>) -> bool + 'c;
impl<'d> Database<'d> {
/// Open a database.
pub fn open(path: &Path) -> Result<Database<'d>> {
let mut db = 0 as *mut _;
unsafe {
success!(raw::sqlite3_open(path_to_c_str!(path), &mut db));
}
Ok(Database { db: db, _phantom: PhantomData })
}
/// Execute an SQL statement.
pub fn execute<'c>(&mut self, sql: &str,
callback: Option<&mut ExecuteCallback<'c>>) -> Result<()> {
unsafe {
match callback {
Some(callback) => {
let mut callback = Box::new(callback);
success!(raw::sqlite3_exec(self.db, str_to_c_str!(sql), Some(execute_callback),
&mut callback as *mut _ as *mut _, 0 as *mut _));
},
None => {
success!(raw::sqlite3_exec(self.db, str_to_c_str!(sql), None,
0 as *mut _, 0 as *mut _));
},
}
}
Ok(())
}
}
impl<'d> Drop for Database<'d> {
#[inline]
fn drop(&mut self) {
unsafe { ::raw::sqlite3_close(self.db) };
}
}
extern fn execute_callback(callback: *mut c_void, count: c_int, values: *mut *mut c_char,
columns: *mut *mut c_char) -> c_int {
macro_rules! c_str_to_string(
($string:expr) => (
match ::std::str::from_utf8(::std::ffi::CStr::from_ptr($string).to_bytes()) {
Ok(string) => String::from(string),
Err(_) => return 1,
}
);
);
unsafe {
let mut pairs = Vec::with_capacity(count as usize);
for i in 0..(count as isize) {
let column = c_str_to_string!(*columns.offset(i) as *const _);
let value = c_str_to_string!(*values.offset(i) as *const _);
pairs.push((column, value));
}
let ref mut callback = *(callback as *mut Box<&mut ExecuteCallback>);
if callback(pairs) { 0 } else { 1 }
}
}

148
src/lib.rs
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@ -3,8 +3,6 @@
extern crate libc;
extern crate sqlite3_sys as raw;
use libc::{c_char, c_int, c_void};
use std::marker::PhantomData;
use std::path::Path;
/// A result.
@ -17,6 +15,42 @@ pub struct Error {
pub message: Option<String>,
}
/// An error code.
#[derive(Clone, Copy, Debug)]
pub enum ErrorCode {
Abort = raw::SQLITE_ABORT as isize,
Authorization = raw::SQLITE_AUTH as isize,
Busy = raw::SQLITE_BUSY as isize,
CantOpen = raw::SQLITE_CANTOPEN as isize,
Constraint = raw::SQLITE_CONSTRAINT as isize,
Corruption = raw::SQLITE_CORRUPT as isize,
Done = raw::SQLITE_DONE as isize,
Empty = raw::SQLITE_EMPTY as isize,
Error = raw::SQLITE_ERROR as isize,
Format = raw::SQLITE_FORMAT as isize,
Full = raw::SQLITE_FULL as isize,
Internal = raw::SQLITE_INTERNAL as isize,
Interruption = raw::SQLITE_INTERRUPT as isize,
IOError = raw::SQLITE_IOERR as isize,
Locked = raw::SQLITE_LOCKED as isize,
Mismatch = raw::SQLITE_MISMATCH as isize,
Misuse = raw::SQLITE_MISUSE as isize,
NoLargeFileSupport = raw::SQLITE_NOLFS as isize,
NoMemory = raw::SQLITE_NOMEM as isize,
NotDatabase = raw::SQLITE_NOTADB as isize,
NotFound = raw::SQLITE_NOTFOUND as isize,
Notice = raw::SQLITE_NOTICE as isize,
OK = raw::SQLITE_OK as isize,
Permission = raw::SQLITE_PERM as isize,
Protocol = raw::SQLITE_PROTOCOL as isize,
Range = raw::SQLITE_RANGE as isize,
ReadOnly = raw::SQLITE_READONLY as isize,
Row = raw::SQLITE_ROW as isize,
Schema = raw::SQLITE_SCHEMA as isize,
TooBig = raw::SQLITE_TOOBIG as isize,
Warning = raw::SQLITE_WARNING as isize,
}
macro_rules! raise(
($message:expr) => (
return Err(::Error { code: ::ErrorCode::Error, message: Some($message.to_string()) })
@ -56,118 +90,12 @@ macro_rules! str_to_c_str(
);
);
/// An error code.
#[derive(Clone, Copy, Debug)]
pub enum ErrorCode {
Abort = raw::SQLITE_ABORT as isize,
Authorization = raw::SQLITE_AUTH as isize,
Busy = raw::SQLITE_BUSY as isize,
CantOpen = raw::SQLITE_CANTOPEN as isize,
Constraint = raw::SQLITE_CONSTRAINT as isize,
Corruption = raw::SQLITE_CORRUPT as isize,
Done = raw::SQLITE_DONE as isize,
Empty = raw::SQLITE_EMPTY as isize,
Error = raw::SQLITE_ERROR as isize,
Format = raw::SQLITE_FORMAT as isize,
Full = raw::SQLITE_FULL as isize,
Internal = raw::SQLITE_INTERNAL as isize,
Interruption = raw::SQLITE_INTERRUPT as isize,
IOError = raw::SQLITE_IOERR as isize,
Locked = raw::SQLITE_LOCKED as isize,
Mismatch = raw::SQLITE_MISMATCH as isize,
Misuse = raw::SQLITE_MISUSE as isize,
NoLargeFileSupport = raw::SQLITE_NOLFS as isize,
NoMemory = raw::SQLITE_NOMEM as isize,
NotDatabase = raw::SQLITE_NOTADB as isize,
NotFound = raw::SQLITE_NOTFOUND as isize,
Notice = raw::SQLITE_NOTICE as isize,
OK = raw::SQLITE_OK as isize,
Permission = raw::SQLITE_PERM as isize,
Protocol = raw::SQLITE_PROTOCOL as isize,
Range = raw::SQLITE_RANGE as isize,
ReadOnly = raw::SQLITE_READONLY as isize,
Row = raw::SQLITE_ROW as isize,
Schema = raw::SQLITE_SCHEMA as isize,
TooBig = raw::SQLITE_TOOBIG as isize,
Warning = raw::SQLITE_WARNING as isize,
}
mod database;
/// A database.
pub struct Database<'d> {
db: *mut raw::sqlite3,
_phantom: PhantomData<&'d raw::sqlite3>,
}
/// A callback executed for each row of the result of an SQL query.
pub type ExecuteCallback<'c> = FnMut(Vec<(String, String)>) -> bool + 'c;
impl<'d> Database<'d> {
/// Open a database.
pub fn open(path: &Path) -> Result<Database<'d>> {
let mut db = 0 as *mut _;
unsafe {
success!(raw::sqlite3_open(path_to_c_str!(path), &mut db));
}
Ok(Database { db: db, _phantom: PhantomData })
}
/// Execute an SQL statement.
pub fn execute<'c>(&mut self, sql: &str,
callback: Option<&mut ExecuteCallback<'c>>) -> Result<()> {
unsafe {
match callback {
Some(callback) => {
let mut callback = Box::new(callback);
success!(raw::sqlite3_exec(self.db, str_to_c_str!(sql), Some(execute_callback),
&mut callback as *mut _ as *mut _, 0 as *mut _));
},
None => {
success!(raw::sqlite3_exec(self.db, str_to_c_str!(sql), None,
0 as *mut _, 0 as *mut _));
},
}
}
Ok(())
}
}
impl<'d> Drop for Database<'d> {
#[inline]
fn drop(&mut self) {
unsafe { ::raw::sqlite3_close(self.db) };
}
}
pub use database::{Database, ExecuteCallback};
/// Open a database.
#[inline]
pub fn open(path: &Path) -> Result<Database> {
Database::open(path)
}
extern fn execute_callback(callback: *mut c_void, count: c_int, values: *mut *mut c_char,
columns: *mut *mut c_char) -> c_int {
macro_rules! c_str_to_string(
($string:expr) => (
match ::std::str::from_utf8(::std::ffi::CStr::from_ptr($string).to_bytes()) {
Ok(string) => String::from(string),
Err(_) => return 1,
}
);
);
unsafe {
let mut pairs = Vec::with_capacity(count as usize);
for i in 0..(count as isize) {
let column = c_str_to_string!(*columns.offset(i) as *const _);
let value = c_str_to_string!(*values.offset(i) as *const _);
pairs.push((column, value));
}
let ref mut callback = *(callback as *mut Box<&mut ExecuteCallback>);
if callback(pairs) { 0 } else { 1 }
}
}