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• Read-file-characters

Read-char$-all

(read-char$-all channel state) reads all remaining characters from a file.

Signature

(read-char$-all channel state) → (mv * state)

Arguments

channel — Guard (symbolp channel).

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

Definitions and Theorems

Function: read-char$-all

(defun read-char$-all (channel state)
  (declare (xargs :stobjs (state)))
  (declare (xargs :guard (symbolp channel)))
  (declare (xargs :guard (open-input-channel-p channel
                                               :character state)))
  (let ((__function__ 'read-char$-all))
    (declare (ignorable __function__))
    (mbe :logic
         (b* (((unless (state-p state))
               (mv nil state))
              ((mv char state)
               (read-char$ channel state))
              ((unless char) (mv nil state))
              ((mv rest state)
               (read-char$-all channel state)))
           (mv (cons (char-fix char) rest) state))
         :exec
         (b* (((mv contents state)
               (tr-read-char$-all channel state nil)))
           (mv (reverse contents) state)))))

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

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

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

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

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

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

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

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

Theorem: character-listp-of-read-char$-all

(defthm character-listp-of-read-char$-all
  (character-listp (mv-nth 0 (read-char$-all channel state))))

Subtopics

Tr-read-char$-all