chore: Migrate to devdocs (#25)

* migrate to devdoc

* doc globs

* nit: fmt

* module doc

src/decoder.nr

@@ -1,19 +1,48 @@
 use super::defaults::BASE64_PADDING_CHAR;
 
+/// Standard Base64 Alphabet (base64) with padding.
 pub global STANDARD: Base64DecodeBE = Base64DecodeBE::new(true);
+
+/// Standard Base64 Alphabet (base64) without padding.
 pub global STANDARD_NO_PAD: Base64DecodeBE = Base64DecodeBE::new(false);
+
+/// URL and Filename Safe Alphabet without padding.
 pub global URL_SAFE: Base64DecodeBE = Base64DecodeBE::base64url(false);
+
+/// URL and Filename Safe Alphabet with padding.
 pub global URL_SAFE_WITH_PAD: Base64DecodeBE = Base64DecodeBE::base64url(true);
 
+/// Invalid value for the lookup table.
 global INVALID_VALUE: u8 = 255;
+
+/// Base64 decoder for big-endian byte arrays.
+///
+/// > Note: If the lookup table is not defined in a struct, access costs are expensive and ROM
+/// tables aren't being used.
 struct Base64DecodeBE {
-    // for some reason, if the lookup table is not defined in a struct, access costs are expensive and ROM tables aren't being used :/
+    /// The base64 lookup table.
     table: [u8; 256],
+    /// Whether the input has padding.
     pad: bool,
 }
+
 impl Base64DecodeBE {
     /// Creates a new decoder that uses the standard Base64 Alphabet (base64) specified in RFC 4648
-    /// https://datatracker.ietf.org/doc/html/rfc4648#section-4
+    /// (https://datatracker.ietf.org/doc/html/rfc4648#section-4).
+    ///
+    /// ## Value Parameters
+    ///
+    /// - `pad`: Whether the input has padding.
+    ///
+    /// ## Returns
+    ///
+    /// The Base64 decoder instance.
+    ///
+    /// ## Usage
+    ///
+    /// ```nr
+    /// let decoder = Base64DecodeBE::new(true);
+    /// ```
     fn new(pad: bool) -> Self {
         Base64DecodeBE {
             table: [
@@ -280,8 +309,22 @@ impl Base64DecodeBE {
         }
     }
 
-    // Creates a new decoder that uses the URL and Filename Safe Alphabet specified in RFC 4648
-    // https://datatracker.ietf.org/doc/html/rfc4648#section-5
+    /// Creates a new decoder that uses the URL and Filename Safe Alphabet specified in RFC 4648
+    /// (https://datatracker.ietf.org/doc/html/rfc4648#section-5).
+    ///
+    /// ## Value Parameters
+    ///
+    /// - `pad`: Whether the input has padding.
+    ///
+    /// ## Returns
+    ///
+    /// The Base64 decoder instance.
+    ///
+    /// ## Usage
+    ///
+    /// ```nr
+    /// let decoder = Base64DecodeBE::base64url(true);
+    /// ```
     fn base64url(pad: bool) -> Self {
         Base64DecodeBE {
             table: [
@@ -548,15 +591,54 @@ impl Base64DecodeBE {
         }
     }
 
+    /// Gets the lookup table value at a given index.
+    ///
+    /// ## Value Parameters
+    ///
+    /// - `idx`: The index to get the value for.
+    ///
+    /// ## Returns
+    ///
+    /// The value from the lookup table.
+    ///
+    /// ## Usage
+    ///
+    /// ```nr
+    /// let value = Base64DecodeBE::new(true).get(65);
+    /// ```
     fn get(self, idx: Field) -> u8 {
         self.table[idx]
     }
 
-    /**
-    * @brief Take an array of ASCII values and convert into *packed* byte array of base64 values
-    *        Each Base64 value is 6 bits. This method will produce a byte array where data is concatenated so that there are no sparse bits
-    *        (e.g. encoding 4 ASCII values produces 24 bits of Base64 data = 3 bytes of output data)
-    **/
+    /// Converts an array of ASCII values into a packed byte array of base64 values.
+    ///
+    /// > Note: Each Base64 value is 6 bits. This method will produce a byte array where data is
+    /// > concatenated so that there are no sparse bits (e.g. encoding 4 ASCII values produces 24
+    /// > bits of Base64 data = 3 bytes of output data).
+    ///
+    /// ## Type Parameters
+    ///
+    /// - `InputElements`: The number of input elements.
+    /// - `OutputBytes`: The number of output bytes.
+    ///
+    /// ## Value Parameters
+    ///
+    /// - `self`: The Base64 decoder instance.
+    /// - `input`: The input array.
+    ///
+    /// ## Constraints
+    ///
+    /// - input and output lengths are correct, including padding.
+    ///
+    /// ## Returns
+    ///
+    /// The packed byte array of base64 values.
+    ///
+    /// ## Usage
+    ///
+    /// ```nr
+    /// let result = Decoder::new(false).decode::<4, 3>([65, 66, 67, 68]);
+    /// ```
     pub fn decode<let InputElements: u32, let OutputBytes: u32>(
         self,
         input: [u8; InputElements],

src/encoder.nr

@@ -1,24 +1,50 @@
 use super::defaults::BASE64_PADDING_CHAR;
 
+/// Standard base64 encoder with padding.
 pub global STANDARD: Base64EncodeBE = Base64EncodeBE::new(true);
+
+/// Standard base64 encoder without padding.
 pub global STANDARD_NO_PAD: Base64EncodeBE = Base64EncodeBE::new(false);
+
+/// URL and Filename Safe base64 encoder without padding.
 pub global URL_SAFE: Base64EncodeBE = Base64EncodeBE::base64url(false);
+
+/// URL and Filename Safe base64 encoder with padding.
 pub global URL_SAFE_WITH_PAD: Base64EncodeBE = Base64EncodeBE::base64url(true);
 
+/// Base 64 encoder for big-endian byte arrays.
+///
+/// > Note: If the lookup table is not defined in a struct, access costs are expensive and ROM
+/// > tables aren't being used.
 struct Base64EncodeBE {
-    // for some reason, if the lookup table is not defined in a struct, access costs are expensive and ROM tables aren't being used :/
+    /// The base64 lookup table.
     table: [u8; 64],
+    /// Whether to pad the output with '=' characters.
     pad: bool,
 }
 
 impl Base64EncodeBE {
     /// Creates a new encoder that uses the standard Base64 Alphabet (base64) specified in RFC 4648
-    /// (https://datatracker.ietf.org/doc/html/rfc4648#section-4)
+    /// (https://datatracker.ietf.org/doc/html/rfc4648#section-4).
+    ///
+    /// The alphabet values are standard UTF-8 (and ASCII) byte encodings so the index in the table
+    /// is the 6-bit Base64 value, and the value at that index is the UTF-8 encoding of that value.
+    ///
+    /// ## Value Parameters
+    ///
+    /// - `pad`: Whether to pad the output with '=' characters.
+    ///
+    /// ## Returns
+    ///
+    /// The Base64 encoder instance.
+    ///
+    /// ## Usage
+    ///
+    /// ```nr
+    /// let encoder = Base64EncodeBE::new(true);
+    /// ```
     fn new(pad: bool) -> Self {
         Base64EncodeBE {
-            // The alphabet values here are standard UTF-8 (and ASCII) byte encodings, so the index
-            // in the table is the 6-bit Base64 value, and the value at that index is the UTF-8
-            // encoding of that value.
             table: [
                 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85,
                 86, 87, 88, 89, 90, // 0-25 (A-Z)
@@ -32,8 +58,22 @@ impl Base64EncodeBE {
         }
     }
 
-    // Creates a new encoder that uses the URL and Filename Safe Alphabet specified in RFC 4648
-    // https://datatracker.ietf.org/doc/html/rfc4648#section-5
+    /// Creates a new encoder that uses the URL and Filename Safe Alphabet specified in RFC 4648
+    /// (https://datatracker.ietf.org/doc/html/rfc4648#section-5).
+    ///
+    /// ## Value Parameters
+    ///
+    /// - `pad`: Whether to pad the output with '=' characters.
+    ///
+    /// ## Returns
+    ///
+    /// The Base64 encoder instance.
+    ///
+    /// ## Usage
+    ///
+    /// ```nr
+    /// let encoder = Base64EncodeBE::base64url(true);
+    /// ```
     fn base64url(pad: bool) -> Self {
         Base64EncodeBE {
             table: [
@@ -50,13 +90,45 @@ impl Base64EncodeBE {
         }
     }
 
+    /// Gets the lookup table value at a given index.
+    ///
+    /// ## Value Parameters
+    ///
+    /// - `idx`: The index in the lookup table.
+    ///
+    /// ## Returns
+    ///
+    /// The byte value from the lookup table.
+    ///
+    /// ## Usage
+    ///
+    /// ```nr
+    /// let encoder = Base64EncodeBE::new(true);
+    /// ```
     fn get(self, idx: Field) -> u8 {
         self.table[idx]
     }
 
-    /**
-    * @brief Take an array of ASCII values and convert into base64 values
-    **/
+    /// Converts an array of ASCII values into base64 values.
+    ///
+    /// ## Type Parameters
+    ///
+    /// - `InputElements`: The number of elements in the input array.
+    ///
+    /// ## Value Parameters
+    ///
+    /// - `self`: The Base64 encoder instance.
+    /// - `input`: The input array of ASCII values.
+    ///
+    /// ## Returns
+    ///
+    /// The array of base64 values.
+    ///
+    /// ## Usage
+    ///
+    /// ```nr
+    /// let encoded = Base64EncodeBE::new(true).encode_elements("asdf".as_bytes());
+    /// ```
     fn encode_elements<let InputElements: u32>(
         self,
         input: [u8; InputElements],
@@ -69,9 +141,31 @@ impl Base64EncodeBE {
         result
     }
 
-    /**
-    * @brief Take an array of packed base64 encoded bytes and convert into ASCII
-    **/
+    /// Converts an array of packed base64 values into ASCII values.
+    ///
+    /// ## Type Parameters
+    ///
+    /// - `InputElements`: The number of elements in the input array.
+    /// - `OutputElements`: The number of elements in the output array.
+    ///
+    /// ## Value Parameters
+    ///
+    /// - `self`: The Base64 encoder instance.
+    /// - `input`: The input array of packed base64 values.
+    ///
+    /// ## Constraints
+    ///
+    /// - input and output lengths are correct, including padding.
+    ///
+    /// ## Returns
+    ///
+    /// The array of ASCII values.
+    ///
+    /// ## Usage
+    ///
+    /// ```nr
+    /// let decoded = Base64EncodeBE::new(true).encode("asdf".as_bytes());
+    /// ```
     pub fn encode<let InputBytes: u32, let OutputElements: u32>(
         self,
         input: [u8; InputBytes],

src/lib.nr

@@ -1,20 +1,19 @@
-// Encodings use the alphabets and padding rules specified in RFC 4648
-// (https://datatracker.ietf.org/doc/html/rfc4648:
-//
-//    A 65-character subset of US-ASCII is used, enabling 6 bits to be
-//    represented per printable character.  (The extra 65th character, "=",
-//    is used to signify a special processing function.)
-//
-//    The encoding process represents 24-bit groups of input bits as output
-//    strings of 4 encoded characters.  Proceeding from left to right, a
-//    24-bit input group is formed by concatenating 3 8-bit input groups.
-//    These 24 bits are then treated as 4 concatenated 6-bit groups, each
-//    of which is translated into a single character in the base 64
-//    alphabet.
-//
-//    Each 6-bit group is used as an index into an array of 64 printable
-//    characters.  The character referenced by the index is placed in the
-//    output string.
+//! Base64 Encoder and Decoder
+//!
+//! Encodings use the alphabets and padding rules specified in RFC-4648
+//! (https://datatracker.ietf.org/doc/html/rfc4648):
+//!
+//! A 65-character subset of US-ASCII is used, enabling 6 bits to be represented per printable
+//! character. (The extra 65th character, "=", is used to signify a special processing function.)
+//!
+//! The encoding process represents 24-bit groups of input bits as output strings of 4 encoded
+//! characters. Proceeding from left to right, a 24-bit input group is formed by concatenating 3
+//! 8-bit input groups. These 24 bits are then treated as 4 concatenated 6-bit groups, each of which
+//! is translated into a single character in the base 64 alphabet.
+//!
+//! Each 6-bit group is used as an index into an array of 64 printable characters. The character
+//! referenced by the index is placed in the output string.
+
 mod encoder;
 pub use encoder::{
     STANDARD as BASE64_ENCODER, STANDARD_NO_PAD as BASE64_NO_PAD_ENCODER,