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• Reading-memory-as-strings-or-bytes

Read-string-zero-terminated

Read memory as a string till a zero is encountered

Signature

(read-string-zero-terminated ptr x86) → (mv * * x86)

Definitions and Theorems

Function: read-string-zero-terminated

(defun read-string-zero-terminated (ptr x86)
  (declare (xargs :stobjs (x86)))
  (declare (type (signed-byte 49) ptr))
  (declare (xargs :guard (and (integerp ptr)
                              (<= (- *2^47*) ptr)
                              (<= ptr *2^47*))))
  (let ((__function__ 'read-string-zero-terminated))
    (declare (ignorable __function__))
    (b* (((mv flg bytes x86)
          (read-memory-zero-terminated ptr x86 nil))
         ((when flg) (mv flg "nil" x86))
         (charlist (bytes-to-charlist bytes)))
      (mv nil (coerce charlist 'string)
          x86))))

Theorem: stringp-mv-nth-1-read-string-zero-terminated

(defthm stringp-mv-nth-1-read-string-zero-terminated
  (implies (force (x86p x86))
           (stringp (mv-nth 1
                            (read-string-zero-terminated ptr x86))))
  :rule-classes :type-prescription)

Theorem: x86p-mv-nth-2-read-string-zero-terminated

(defthm x86p-mv-nth-2-read-string-zero-terminated
  (implies (x86p x86)
           (x86p (mv-nth 2
                         (read-string-zero-terminated ptr x86)))))