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Read-channel-into-memory

Signature

(read-channel-into-memory channel ptr bytes-read x86 state) 
  → 
(mv bytes-read x86 state)

Arguments

channel — Guard (symbolp channel).

ptr — Guard (canonical-address-p ptr).

bytes-read — Guard (natp bytes-read).

Returns

bytes-read — Type (natp bytes-read), given (and (state-p1 state) (symbolp channel) (open-input-channel-p channel :byte state)) .

x86 — Type (x86p x86), given (x86p x86).

state — Type (state-p1 state), given (and (state-p1 state) (symbolp channel) (open-input-channel-p1 channel :byte state)) .

Definitions and Theorems

Function: read-channel-into-memory

(defun read-channel-into-memory (channel ptr bytes-read x86 state)
 (declare (xargs :stobjs (x86 state)))
 (declare (xargs :guard (and (symbolp channel)
                             (canonical-address-p ptr)
                             (natp bytes-read))))
 (declare
      (xargs :guard (and (open-input-channel-p channel
                                               :byte state)
                         (canonical-address-p (+ ptr bytes-read)))))
 (let ((__function__ 'read-channel-into-memory))
  (declare (ignorable __function__))
  (b* ((bytes-read (nfix bytes-read))
       ((mv current-byte state)
        (read-byte$ channel state))
       ((when (not current-byte))
        (mv bytes-read x86 state))
       ((mv flg x86)
        (wml08 (+ ptr bytes-read)
               current-byte x86))
       ((when (or flg
                  (not (canonical-address-p (+ ptr bytes-read 1)))))
        (mv bytes-read x86 state)))
    (read-channel-into-memory channel ptr (1+ bytes-read)
                              x86 state))))

Theorem: natp-of-read-channel-into-memory.bytes-read

(defthm natp-of-read-channel-into-memory.bytes-read
 (implies
   (and (state-p1 state)
        (symbolp channel)
        (open-input-channel-p channel
                              :byte state))
   (b*
     (((mv ?bytes-read ?x86 acl2::?state)
       (read-channel-into-memory channel ptr bytes-read x86 state)))
     (natp bytes-read)))
 :rule-classes :rewrite)

Theorem: x86p-of-read-channel-into-memory.x86

(defthm x86p-of-read-channel-into-memory.x86
 (implies
   (x86p x86)
   (b*
     (((mv ?bytes-read ?x86 acl2::?state)
       (read-channel-into-memory channel ptr bytes-read x86 state)))
     (x86p x86)))
 :rule-classes :rewrite)

Theorem: state-p1-of-read-channel-into-memory.state

(defthm state-p1-of-read-channel-into-memory.state
 (implies
   (and (state-p1 state)
        (symbolp channel)
        (open-input-channel-p1 channel
                               :byte state))
   (b*
     (((mv ?bytes-read ?x86 acl2::?state)
       (read-channel-into-memory channel ptr bytes-read x86 state)))
     (state-p1 state)))
 :rule-classes :rewrite)

Theorem: read-channel-into-memory-leaves-channel-open

(defthm read-channel-into-memory-leaves-channel-open
 (implies
  (open-input-channel-p1 channel
                         :byte state)
  (open-input-channel-p1
   channel
   :byte
   (mv-nth
     2
     (read-channel-into-memory channel ptr bytes-read x86 state)))))