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• Read-file-bytes

Read-byte$-all

(read-byte$-all channel state) reads all remaining bytes from a file.

This is the main loop inside read-file-bytes. It reads everything in the file, but doesn't handle opening or closing the file.

Definitions and Theorems

Function: tr-read-byte$-all

(defun tr-read-byte$-all (channel state acc)
  (declare (xargs :guard (and (state-p state)
                              (symbolp channel)
                              (open-input-channel-p channel
                                                    :byte state))))
  (b* (((unless (mbt (state-p state)))
        (mv acc state))
       ((mv byte state)
        (read-byte$ channel state))
       ((unless byte) (mv acc state))
       (acc (cons (mbe :logic (if (unsigned-byte-p 8 byte) byte 0)
                       :exec byte)
                  acc)))
    (tr-read-byte$-all channel state acc)))

Function: read-byte$-all

(defun read-byte$-all (channel state)
  (declare (xargs :guard (and (state-p state)
                              (symbolp channel)
                              (open-input-channel-p channel
                                                    :byte state))))
  (mbe :logic
       (b* (((unless (state-p state))
             (mv nil state))
            ((mv byte state)
             (read-byte$ channel state))
            ((unless byte) (mv nil state))
            ((mv rest state)
             (read-byte$-all channel state))
            (byte (if (unsigned-byte-p 8 byte) byte 0)))
         (mv (cons byte rest) state))
       :exec
       (b* (((mv contents state)
             (tr-read-byte$-all channel state nil)))
         (mv (reverse contents) state))))

Theorem: tr-read-byte$-all-removal

(defthm tr-read-byte$-all-removal
  (equal (tr-read-byte$-all channel state nil)
         (mv (rev (mv-nth 0 (read-byte$-all channel state)))
             (mv-nth 1 (read-byte$-all channel state)))))

Theorem: true-listp-of-read-byte$-all

(defthm true-listp-of-read-byte$-all
  (true-listp (mv-nth 0 (read-byte$-all channel state)))
  :rule-classes :type-prescription)

Theorem: state-p1-of-read-byte$-all

(defthm state-p1-of-read-byte$-all
  (implies (and (force (state-p1 state))
                (force (symbolp channel))
                (force (open-input-channel-p1 channel
                                              :byte state)))
           (state-p1 (mv-nth 1 (read-byte$-all channel state)))))

Theorem: open-input-channel-p1-of-read-byte$-all

(defthm open-input-channel-p1-of-read-byte$-all
  (implies (and (force (state-p1 state))
                (force (symbolp channel))
                (force (open-input-channel-p1 channel
                                              :byte state)))
           (open-input-channel-p1
                channel
                :byte (mv-nth 1 (read-byte$-all channel state)))))

Theorem: integer-listp-of-read-byte$-all

(defthm integer-listp-of-read-byte$-all
  (integer-listp (mv-nth 0 (read-byte$-all channel state))))

Theorem: nat-listp-of-read-byte$-all

(defthm nat-listp-of-read-byte$-all
  (nat-listp (mv-nth 0 (read-byte$-all channel state))))

Theorem: unsigned-byte-listp-of-read-byte$-all

(defthm unsigned-byte-listp-of-read-byte$-all
  (unsigned-byte-listp 8
                       (mv-nth 0 (read-byte$-all channel state))))