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• Program-execution

Read-file-into-memory

Signature

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

Arguments

filename — Guard (stringp filename).

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

Returns

bytes-read — Type (natp bytes-read), given (and (stringp filename) (canonical-address-p ptr) (state-p1 state)).

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

state — Type (state-p1 state), given (and (stringp filename) (state-p1 state)).

Definitions and Theorems

Function: read-file-into-memory

(defun read-file-into-memory (filename ptr x86 state)
  (declare (xargs :stobjs (x86 state)))
  (declare (xargs :guard (and (stringp filename)
                              (canonical-address-p ptr))))
  (let ((__function__ 'read-file-into-memory))
    (declare (ignorable __function__))
    (b* (((mv channel state)
          (open-input-channel filename
                              :byte state))
         ((when (not channel)) (mv 0 x86 state))
         ((mv bytes-read x86 state)
          (read-channel-into-memory channel ptr 0 x86 state))
         (state (close-input-channel channel state)))
      (mv bytes-read x86 state))))

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

(defthm natp-of-read-file-into-memory.bytes-read
  (implies (and (stringp filename)
                (canonical-address-p ptr)
                (state-p1 state))
           (b* (((mv ?bytes-read ?x86 acl2::?state)
                 (read-file-into-memory filename ptr x86 state)))
             (natp bytes-read)))
  :rule-classes :rewrite)

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

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

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

(defthm state-p1-of-read-file-into-memory.state
  (implies (and (stringp filename)
                (state-p1 state))
           (b* (((mv ?bytes-read ?x86 acl2::?state)
                 (read-file-into-memory filename ptr x86 state)))
             (state-p1 state)))
  :rule-classes :rewrite)