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-rw-r--r--benoit-cli/src/config/take/mod.rs282
1 files changed, 282 insertions, 0 deletions
diff --git a/benoit-cli/src/config/take/mod.rs b/benoit-cli/src/config/take/mod.rs
new file mode 100644
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+++ b/benoit-cli/src/config/take/mod.rs
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+/*
+ Copyright 2021, 2023-2024 Gabriel Bjørnager Jen-
+ sen.
+
+ This file is part of benoit-cli.
+
+ benoit-cli is free software: you can redistrib-
+ ute it and/or modify it under the terms of the
+ GNU General Public License as published by the
+ Free Software Foundation, either version 3 of
+ the License, or (at your option) any later ver-
+ sion.
+
+ benoit-cli is distributed in the hope that it
+ will be useful, but WITHOUT ANY WARRANTY; with-
+ out even the implied warranty of MERCHANTABILITY
+ or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU Gene-
+ ral Public License along with benoit-cli. If
+ not, see <https://www.gnu.org/licenses/>.
+*/
+
+use crate::config::{Field, Section};
+use crate::error::Error;
+
+use benoit::PRECISION;
+use benoit::complex::Complex;
+use rug::Float;
+use std::borrow::Cow;
+use std::fs::canonicalize;
+use std::path::PathBuf;
+use std::str::FromStr;
+use toml::Value;
+
+/// Used for loading configuration fields.
+///
+/// More specifically, this is to be used with the untyped [`Field`] type, where using [`take`](Take::take) collapses the field into a definitively typed object.
+pub trait Take<T> {
+ /// Collapses the field into the given type `T`.
+ ///
+ /// # Errors
+ ///
+ /// Returns an error if the field doesn't exist or is a different type.
+
+ fn take(self) -> Result<T, Error>;
+}
+
+fn test_field_domain<T, U>(name: &str, value: &T, min: U, max: U) -> Result<(), Error>
+where
+ T: PartialOrd + ToString,
+ U: Copy + Into<T> + ToString, {
+ if *value < min.into() {
+ Err(Error::FieldLowerBounds {
+ name: name.to_owned(),
+ value: value.to_string(),
+ limit: min.to_string(),
+ })
+ } else if *value > max.into() {
+ Err(Error::FieldUpperBounds {
+ name: name.to_owned(),
+ value: value.to_string(),
+ limit: max.to_string(),
+ })
+ } else {
+ Ok(())
+ }
+}
+
+impl Take<bool> for Field<'_> {
+ fn take(mut self) -> Result<bool, Error> {
+ let Value::Boolean(value) = *self.borrow_value()? else {
+ return Err(Error::WrongFieldType { name: self.name, ok_type: "bool" });
+ };
+
+ Ok(value)
+ }
+}
+
+impl Take<Complex> for Field<'_> {
+ fn take(mut self) -> Result<Complex, Error> {
+ let s = if let Value::String(ref s) = *self.borrow_value()? {
+ Ok(s)
+ } else {
+ Err(Error::WrongFieldType { name: self.name, ok_type: "complex" })
+ }?;
+
+ FromStr::from_str(s).map_err(Into::into)
+ }
+}
+
+impl Take<f32> for Field<'_> {
+ fn take(mut self) -> Result<f32, Error> {
+ if let Value::Float(value) = *self.borrow_value()? {
+ // Is this even possible?
+ if value.is_nan() {
+ return Err(Error::NonNumberField { name: self.name });
+ }
+
+ if value.is_infinite() {
+ return Err(Error::InfiniteField { name: self.name });
+ }
+
+ test_field_domain(&self.name, &value, -f32::MAX, f32::MAX)?;
+
+ Ok(value as f32)
+ } else {
+ Err(Error::WrongFieldType { name: self.name, ok_type: "float" })
+ }
+ }
+}
+
+impl Take<f64> for Field<'_> {
+ fn take(mut self) -> Result<f64, Error> {
+ if let Value::Float(value) = *self.borrow_value()? {
+ // Is this even possible?
+ if value.is_nan() {
+ return Err(Error::NonNumberField { name: self.name });
+ }
+
+ if value.is_infinite() {
+ return Err(Error::InfiniteField { name: self.name });
+ }
+
+ Ok(value)
+ } else {
+ Err(Error::WrongFieldType { name: self.name, ok_type: "float" })
+ }
+ }
+}
+
+impl Take<Float> for Field<'_> {
+ fn take(mut self) -> Result<Float, Error> {
+ if let Value::String(ref value) = *self.borrow_value()? {
+ if let Ok(value) = Float::parse(value) {
+ return Ok(Float::with_val(PRECISION, value));
+ }
+ }
+
+ Err(Error::WrongFieldType { name: self.name, ok_type: "bigfloat" })
+ }
+}
+
+impl Take<i16> for Field<'_> {
+ fn take(mut self) -> Result<i16, Error> {
+ if let Value::Integer(value) = *self.borrow_value()? {
+ test_field_domain(&self.name, &value, i16::MIN, i16::MAX)?;
+
+ return Ok(TryFrom::try_from(value).unwrap());
+ };
+
+ Err(Error::WrongFieldType { name: self.name, ok_type: "integer" })
+ }
+}
+
+impl Take<i32> for Field<'_> {
+ fn take(mut self) -> Result<i32, Error> {
+ if let Value::Integer(value) = *self.borrow_value()? {
+ test_field_domain(&self.name, &value, i32::MIN, i32::MAX)?;
+
+ return Ok(TryFrom::try_from(value).unwrap());
+ };
+
+ Err(Error::WrongFieldType { name: self.name, ok_type: "integer" })
+ }
+}
+
+impl Take<i64> for Field<'_> {
+ fn take(mut self) -> Result<i64, Error> {
+ if let Value::Integer(value) = *self.borrow_value()? {
+ return Ok(value);
+ };
+
+ Err(Error::WrongFieldType { name: self.name, ok_type: "integer" })
+ }
+}
+
+impl Take<i8> for Field<'_> {
+ fn take(mut self) -> Result<i8, Error> {
+ if let Value::Integer(value) = *self.borrow_value()? {
+ test_field_domain(&self.name, &value, i8::MIN, i8::MAX)?;
+
+ return Ok(TryFrom::try_from(value).unwrap());
+ };
+
+ Err(Error::WrongFieldType { name: self.name, ok_type: "integer" })
+ }
+}
+
+impl Take<PathBuf> for Field<'_> {
+ fn take(self) -> Result<PathBuf, Error> {
+ let s = <Self as Take<String>>::take(self)?;
+
+ canonicalize(&s).map_err(|e| Error::InvalidPath { path: s, source: e })
+ }
+}
+
+impl<'a> Take<Section<'a>> for Field<'a> {
+ fn take(mut self) -> Result<Section<'a>, Error> {
+ if let Value::Table(ref table) = *self.borrow_value()? {
+ return Ok(Section {
+ name: Some(self.name),
+ table: Cow::Borrowed(table),
+ });
+ }
+
+ Err(Error::WrongFieldType { name: self.name, ok_type: "section" })
+ }
+}
+
+impl Take<String> for Field<'_> {
+ fn take(mut self) -> Result<String, Error> {
+ if let Value::String(ref s) = *self.borrow_value()? {
+ Ok(s.to_owned())
+ } else {
+ Err(Error::WrongFieldType { name: self.name, ok_type: "string" })
+ }
+ }
+}
+
+impl Take<u16> for Field<'_> {
+ fn take(mut self) -> Result<u16, Error> {
+ if let Value::Integer(value) = *self.borrow_value()? {
+ if value.is_negative() {
+ return Err(Error::NegativeField { name: self.name });
+ }
+
+ test_field_domain(&self.name, &value, u16::MIN, u16::MAX)?;
+
+ return Ok(TryFrom::try_from(value).unwrap());
+ };
+
+ Err(Error::WrongFieldType { name: self.name, ok_type: "integer" })
+ }
+}
+
+impl Take<u32> for Field<'_> {
+ fn take(mut self) -> Result<u32, Error> {
+ if let Value::Integer(value) = *self.borrow_value()? {
+ if value.is_negative() {
+ return Err(Error::NegativeField { name: self.name });
+ }
+
+ test_field_domain(&self.name, &value, u32::MIN, u32::MAX)?;
+
+ return Ok(TryFrom::try_from(value).unwrap());
+ };
+
+ Err(Error::WrongFieldType { name: self.name, ok_type: "integer" })
+ }
+}
+
+impl Take<u64> for Field<'_> {
+ fn take(mut self) -> Result<u64, Error> {
+ if let Value::Integer(value) = *self.borrow_value()? {
+ if value.is_negative() {
+ return Err(Error::NegativeField { name: self.name })
+ }
+
+ return Ok(TryFrom::try_from(value).unwrap());
+ };
+
+ Err(Error::WrongFieldType { name: self.name, ok_type: "integer" })
+ }
+}
+
+impl Take<u8> for Field<'_> {
+ fn take(mut self) -> Result<u8, Error> {
+ if let Value::Integer(value) = *self.borrow_value()? {
+ if value.is_negative() {
+ return Err(Error::NegativeField { name: self.name });
+ }
+
+ test_field_domain(&self.name, &value, u8::MIN, u8::MAX)?;
+
+ return Ok(TryFrom::try_from(value).unwrap());
+ };
+
+ Err(Error::WrongFieldType { name: self.name, ok_type: "integer" })
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 23:52:30 +0100