feat: add czv, czv-wasm, and czv-python (init release)

czv-python/src/count.rs

@@ -0,0 +1,33 @@
+use crate::Result;
+use csv::ReaderBuilder;
+use pyo3::pyfunction;
+
+/// Returns a count of the total number of rows.
+///
+/// ## Arguments
+///
+/// * `file_data` - CSV file data.
+/// * `include_header_row` - Specify whether to include the header row (first row) in the row count.
+#[pyfunction]
+pub fn row_count(file_data: String, include_header_row: Option<bool>) -> Result<usize> {
+    let mut rdr = ReaderBuilder::new();
+
+    rdr.has_headers(!include_header_row.unwrap_or(false));
+    return Ok(rdr.from_reader(file_data.as_bytes()).records().count());
+}
+
+/// Returns a count of the total number of columns (fields).
+///
+/// ## Arguments
+///
+/// * `file_data` - CSV file data.
+#[pyfunction]
+pub fn column_count(file_data: Option<String>) -> Result<usize> {
+    let rdr = ReaderBuilder::new();
+
+    if let Some(file_data) = file_data {
+        return Ok(rdr.from_reader(file_data.as_bytes()).headers()?.len());
+    } else {
+        bail!("Could not determine a file path or file data for column_count_builder.");
+    }
+}

czv-python/src/lib.rs

@@ -0,0 +1,43 @@
+use pyo3::prelude::*;
+
+// Error-handling helpers
+#[derive(thiserror::Error, Debug)]
+#[error("{0}")]
+pub struct CzvError(anyhow::Error);
+
+impl From<pyo3::PyErr> for CzvError {
+    fn from(value: pyo3::PyErr) -> Self {
+        value.into()
+    }
+}
+
+impl From<csv::Error> for CzvError {
+    fn from(value: csv::Error) -> Self {
+        value.into()
+    }
+}
+
+impl From<CzvError> for pyo3::PyErr {
+    fn from(value: CzvError) -> Self {
+        value.into()
+    }
+}
+
+pub type Result<T> = anyhow::Result<T, CzvError>;
+
+#[allow(unused_macros)]
+macro_rules! bail {
+    ($err:expr $(,)?) => {
+        return Err(crate::CzvError(anyhow::anyhow!($err)))
+    };
+}
+
+// Command imports
+pub mod count;
+
+#[pymodule]
+fn czv(m: &Bound<'_, PyModule>) -> PyResult<()> {
+    m.add_function(wrap_pyfunction!(count::row_count, m)?)?;
+    m.add_function(wrap_pyfunction!(count::column_count, m)?)?;
+    Ok(())
+}