• Top
  • Documentation
  • Books
  • Boolean-reasoning
  • Projects
  • Debugging
  • Std
    • Std/lists
    • Std/alists
    • Obags
    • Std/util
    • Std/strings
      • Pretty-printing
      • Printtree
      • Base64
        • Base64-impl
        • Base64-decode-list
        • Base64-decode
        • Base64-encode-list
        • Base64-revappend-decode
        • Base64-revappend-encode
        • Base64-encode
      • Charset-p
      • Strtok!
      • Cases
      • Concatenation
      • Html-encoding
      • Character-kinds
      • Substrings
      • Strtok
      • Equivalences
      • Url-encoding
      • Lines
      • Explode-implode-equalities
      • Ordering
      • Numbers
      • Pad-trim
      • Coercion
      • Std/strings/digit-to-char
      • Substitution
      • Symbols
    • Std/io
    • Std/osets
    • Std/basic
    • Std/system
    • Std/typed-lists
    • Std/bitsets
    • Std/testing
    • Std/typed-alists
    • Std/stobjs
    • Std-extensions
  • Proof-automation
  • Macro-libraries
  • ACL2
  • Interfacing-tools
  • Hardware-verification
  • Software-verification
  • Math
  • Testing-utilities

• Base64

Base64-encode

Base64 encode a string.

Signature

(base64-encode x) → encoded

Arguments

x — String to be encoded.
    Guard (stringp x).

Returns

encoded — Encoded version of x.
    Type (stringp encoded).

Definitions and Theorems

Function: base64-encode

(defun base64-encode (x)
  (declare (xargs :guard (stringp x)))
  (declare (type string x))
  (let ((acl2::__function__ 'base64-encode))
    (declare (ignorable acl2::__function__))
    (mbe :logic (implode (base64-encode-list (explode x)))
         :exec (rchars-to-string (b64-encode-str-impl x 0 (length x)
                                                      nil)))))

Theorem: stringp-of-base64-encode

(defthm stringp-of-base64-encode
  (b* ((encoded (base64-encode x)))
    (stringp encoded))
  :rule-classes :type-prescription)