• Top
  • Documentation
  • Books
  • Boolean-reasoning
  • Debugging
  • Projects
  • Std
  • Proof-automation
  • Macro-libraries
  • ACL2
  • Interfacing-tools
    • Io
      • Fmt
      • Msg
      • Cw
      • Set-evisc-tuple
      • Set-iprint
      • Print-control
      • Read-file-into-string
      • Msgp
      • Std/io
      • Printing-to-strings
      • Evisc-tuple
      • Output-controls
      • Observation
      • *standard-co*
      • Ppr-special-syms
      • Standard-oi
      • Standard-co
      • Without-evisc
      • Serialize
      • Output-to-file
      • Fmt-to-comment-window
      • Princ$
      • Character-encoding
      • Open-output-channel!
      • Cw-print-base-radix
      • Set-print-case
      • Set-print-base
      • Print-object$
      • Fmx-cw
      • Extend-pathname
      • Print-object$+
      • Set-print-radix
      • Set-fmt-hard-right-margin
      • File-write-date$
      • Proofs-co
      • Set-print-base-radix
      • Print-base-p
      • *standard-oi*
      • Wof
      • File-length$
      • Fms!-lst
      • Delete-file$
      • *standard-ci*
      • Write-list
      • Trace-co
      • Fmt!
      • Fms
      • Cw!
      • Fmt-to-comment-window!
      • Fms!
      • Eviscerate-hide-terms
      • Fmt1!
      • Fmt-to-comment-window!+
      • Read-file-into-byte-array-stobj
      • Fmt1
      • Fmt-to-comment-window+
      • Cw-print-base-radix!
      • Read-file-into-character-array-stobj
      • Fmx
      • Cw!+
      • Write-objects-to-file!
      • Read-objects-from-book
      • Newline
      • Cw+
      • Probe-file
      • Write-objects-to-file
      • Read-objects-from-file
      • Read-object-from-file
      • Read-file-into-byte-list
      • Set-fmt-soft-right-margin
      • Read-file-into-character-list
      • Io-utilities
    • Defttag
    • Sys-call
    • Save-exec
    • Quicklisp
    • Oslib
    • Std/io
    • Bridge
    • Clex
    • Tshell
    • Unsound-eval
    • Hacker
    • ACL2s-interface
    • Startup-banner
    • Command-line
  • Hardware-verification
  • Software-verification
  • Math
  • Testing-utilities

• Io
• File-io-light

Read-file-into-character-list

Read a file into a character-list.

;; Returns a character list, or nil if the file does not exist.
;; May be faster than read-file-characters from std/io.
;; Note that this does not return state (see :doc read-file-into-string
;; for an explanation).
(defund read-file-into-character-list (filename state)
  (declare (xargs :guard (stringp filename)
                  :stobjs state))
  (let ((string (read-file-into-string filename)))
    (if (not string)
        nil
      (coerce string 'list))))