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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