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use std::fmt::{self, Display, Formatter};
use std::os::raw::c_int;
use std::str::FromStr;
use libsqlite3_sys::{SQLITE_BLOB, SQLITE_FLOAT, SQLITE_INTEGER, SQLITE_NULL, SQLITE_TEXT};
use crate::error::BoxDynError;
use crate::type_info::TypeInfo;
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
#[cfg_attr(feature = "offline", derive(serde::Serialize, serde::Deserialize))]
pub(crate) enum DataType {
Null,
Int,
Float,
Text,
Blob,
#[allow(dead_code)]
Numeric,
Bool,
Int64,
Date,
Time,
Datetime,
}
#[derive(Debug, Clone, Eq, PartialEq, Hash)]
#[cfg_attr(feature = "offline", derive(serde::Serialize, serde::Deserialize))]
pub struct SqliteTypeInfo(pub(crate) DataType);
impl Display for SqliteTypeInfo {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
f.pad(self.name())
}
}
impl TypeInfo for SqliteTypeInfo {
fn is_null(&self) -> bool {
matches!(self.0, DataType::Null)
}
fn name(&self) -> &str {
match self.0 {
DataType::Null => "NULL",
DataType::Text => "TEXT",
DataType::Float => "REAL",
DataType::Blob => "BLOB",
DataType::Int | DataType::Int64 => "INTEGER",
DataType::Numeric => "NUMERIC",
DataType::Bool => "BOOLEAN",
DataType::Date => "DATE",
DataType::Time => "TIME",
DataType::Datetime => "DATETIME",
}
}
}
impl DataType {
pub(crate) fn from_code(code: c_int) -> Self {
match code {
SQLITE_INTEGER => DataType::Int,
SQLITE_FLOAT => DataType::Float,
SQLITE_BLOB => DataType::Blob,
SQLITE_NULL => DataType::Null,
SQLITE_TEXT => DataType::Text,
_ => panic!("unknown data type code {}", code),
}
}
}
impl FromStr for DataType {
type Err = BoxDynError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let s = s.to_ascii_lowercase();
Ok(match &*s {
"int4" => DataType::Int,
"int8" => DataType::Int64,
"boolean" | "bool" => DataType::Bool,
"date" => DataType::Date,
"time" => DataType::Time,
"datetime" | "timestamp" => DataType::Datetime,
_ if s.contains("int") => DataType::Int64,
_ if s.contains("char") || s.contains("clob") || s.contains("text") => DataType::Text,
_ if s.contains("blob") => DataType::Blob,
_ if s.contains("real") || s.contains("floa") || s.contains("doub") => DataType::Float,
_ => {
return Err(format!("unknown type: `{}`", s).into());
}
})
}
}
#[cfg(feature = "any")]
impl From<SqliteTypeInfo> for crate::any::AnyTypeInfo {
#[inline]
fn from(ty: SqliteTypeInfo) -> Self {
crate::any::AnyTypeInfo(crate::any::type_info::AnyTypeInfoKind::Sqlite(ty))
}
}
#[test]
fn test_data_type_from_str() -> Result<(), BoxDynError> {
assert_eq!(DataType::Int, "INT4".parse()?);
assert_eq!(DataType::Int64, "INT".parse()?);
assert_eq!(DataType::Int64, "INTEGER".parse()?);
assert_eq!(DataType::Int64, "INTBIG".parse()?);
assert_eq!(DataType::Int64, "MEDIUMINT".parse()?);
assert_eq!(DataType::Int64, "BIGINT".parse()?);
assert_eq!(DataType::Int64, "UNSIGNED BIG INT".parse()?);
assert_eq!(DataType::Int64, "INT8".parse()?);
assert_eq!(DataType::Text, "CHARACTER(20)".parse()?);
assert_eq!(DataType::Text, "NCHAR(55)".parse()?);
assert_eq!(DataType::Text, "TEXT".parse()?);
assert_eq!(DataType::Text, "CLOB".parse()?);
assert_eq!(DataType::Blob, "BLOB".parse()?);
assert_eq!(DataType::Float, "REAL".parse()?);
assert_eq!(DataType::Float, "FLOAT".parse()?);
assert_eq!(DataType::Float, "DOUBLE PRECISION".parse()?);
assert_eq!(DataType::Bool, "BOOLEAN".parse()?);
assert_eq!(DataType::Bool, "BOOL".parse()?);
assert_eq!(DataType::Datetime, "DATETIME".parse()?);
assert_eq!(DataType::Time, "TIME".parse()?);
assert_eq!(DataType::Date, "DATE".parse()?);
Ok(())
}