Pasted CSV struct from other project

Sources/CSV/CSV.swift

@@ -1,3 +1,54 @@
+import Bits
+
 struct CSV {
-    var text = "Hello, World!"
+    struct Column {
+        let header: String
+        var fields: [String?]
+    }
+    
+    static func parse(_ bytes: Bytes) -> [String: [String?]] {
+        let parsed: [Column] = parse(bytes)
+        var columns: [String: [String?]] = [:]
+        
+        for column in parsed {
+            columns[column.header] = column.fields
+        }
+        
+        return columns
+    }
+    
+    static func parse(_ bytes: Bytes) -> [String: Column] {
+        let parsed: [Column] = parse(bytes)
+        var columns: [String: Column] = [:]
+        
+        for column in parsed {
+            columns[column.header] = column
+        }
+        
+        return columns
+        
+    }
+    
+    static func parse(_ bytes: Bytes) -> [Column] {
+        var rows = bytes.split(separator: Byte.newLine)
+        guard let headers = rows.first?.split(separator: Byte.comma) else {
+            return []
+        }
+        rows.removeFirst()
+        
+        var columns: [Column]  = headers.map({ header in
+            let head = header.makeString()
+            let column = Column(header: head, fields: [])
+            return column
+        })
+        
+        for row in rows {
+            for (cell, columnIndex) in zip(row.split(separator: Byte.comma, omittingEmptySubsequences: false), 0...columns.count-1) {
+                let text = cell == [] ? nil : cell.makeString()
+                columns[columnIndex].fields.append(text)
+            }
+        }
+        
+        return columns
+    }
 }