• Top
  • Documentation
  • Books
  • Boolean-reasoning
  • Projects
  • Debugging
  • Community
  • Std
    • Std/lists
    • Omaps
    • Std/alists
    • Obags
    • Std/util
    • Std/strings
      • Pretty-printing
      • Printtree
      • Base64
      • Charset-p
      • Strtok!
      • Cases
      • Concatenation
      • Character-kinds
      • Html-encoding
      • Substrings
      • Strtok
      • Equivalences
      • Url-encoding
      • Lines
      • Explode-implode-equalities
      • Ordering
      • Numbers
        • Decimal
          • Parse-nat-from-string
          • Parse-nat-from-charlist
          • Nat-to-dec-chars
          • Dec-digit-char-p
          • Dec-digit-chars-value
          • Dec-digit-char-listp
          • Take-leading-dec-digit-chars
          • Dec-digit-char-value
          • Dec-digit-char-list*p
          • Nat-to-dec-string-width
          • Nat-to-dec-string
          • Dec-digit-string-p
          • Strval
          • Skip-leading-digits
          • Nat-to-dec-string-size
            • Nat-to-dec-string-size-slow
            • Nat-to-dec-string-size-fast
          • Int-to-dec-string-width
          • Int-to-dec-string
          • Nonzero-dec-digit-char-p
          • Nat-to-dec-string-list
          • Int-to-dec-string-list
          • Revappend-nat-to-dec-chars
        • Hex
        • Octal
        • Binary
      • Pad-trim
      • Coercion
      • Std/strings/digit-to-char
      • Substitution
      • Symbols
    • Std/osets
    • Std/io
    • Std/basic
    • Std/system
    • Std/typed-lists
    • Std/bitsets
    • Std/testing
    • Std/typed-alists
    • Std/stobjs
  • Proof-automation
  • Macro-libraries
  • ACL2
  • Interfacing-tools
  • Hardware-verification
  • Software-verification
  • Math
  • Testing-utilities

• Nat-to-dec-string-size

Nat-to-dec-string-size-fast

Signature

(nat-to-dec-string-size-fast x) → *

Definitions and Theorems

Function: nat-to-dec-string-size-fast

(defun nat-to-dec-string-size-fast (x)
 (declare (type (unsigned-byte 29) x))
 (let ((acl2::__function__ 'nat-to-dec-string-size-fast))
  (declare (ignorable acl2::__function__))
  (mbe
   :logic (nat-to-dec-string-size-slow x)
   :exec
   (if (< x 10)
       1
    (the
     (unsigned-byte 29)
     (+
      1
      (the
          (unsigned-byte 29)
          (nat-to-dec-string-size-fast (the (unsigned-byte 29)
                                            (truncate x 10))))))))))