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tex2page.lisp
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":"; export T2PARG=$1
":"; if test -z "$LISP"; then export LISP=ecl; fi
":"; if test "$LISP" = abcl; then exec abcl --load $0 --batch "$@"
":"; elif test "$LISP" = allegro; then exec alisp -L $0 -kill
":"; elif test "$LISP" = clasp; then exec clasp --script $0 -- "$@" 2> /dev/null
":"; elif test "$LISP" = clisp; then exec clisp $0 -q "$@"
":"; elif test "$LISP" = clozure; then exec ccl -l $0 -e '(ccl:quit)' -- "$@"
":"; elif test "$LISP" = cmucl; then exec lisp -quiet -load $0 -eval '(ext:quit)' "$@"
":"; elif test "$LISP" = ecl; then exec ecl -shell $0 "$@"
":"; elif test "$LISP" = mkcl; then exec mkcl -shell $0 -- "$@"
":"; elif test "$LISP" = sbcl; then exec sbcl --script $0 "$@"
":"; fi
;tex2page
;Dorai Sitaram
;For details, see
;http://ds26gte.github.io/tex2page/index.html
#+sbcl
(declaim
(sb-ext:muffle-conditions style-warning))
#+sbcl
(eval-when (:compile-toplevel)
(declaim (optimize (speed 3) (safety 2))))
(defpackage :tex2page
(:use :cl)
(:export :tex2page))
(in-package :tex2page)
(eval-when (:compile-toplevel :load-toplevel :execute)
(setq *print-case* :downcase
*load-verbose* nil
*compile-verbose* nil))
(defparameter *tex2page-version* "20240429") ;last change
(defparameter *tex2page-website*
;for details, please see
"http://ds26gte.github.io/tex2page/index.html")
(defmacro string-append (&rest ss)
`(concatenate 'string ,@ss))
(defmacro list->string (L)
`(concatenate 'string ,L))
(defmacro string->list (s)
`(concatenate 'list ,s))
(defmacro string-length (s)
`(length ,s))
(defmacro string-index (s c)
`(position ,c ,s))
(defmacro string-reverse-index (s c)
`(position ,c ,s :from-end t))
(defmacro index-of (L x)
`(position ,x ,L))
(defmacro close-input-port (p)
`(close ,p))
(defmacro close-output-port (p)
`(close ,p))
(defparameter *tex2page-copyright-notice*
(string-append "Copyright (C) 1997-"
(subseq *tex2page-version* 0 4) " Dorai Sitaram"))
(defun retrieve-env (s)
(declare (string s))
#+(or abcl clasp clisp ecl) (ext:getenv s)
#+allegro (sys:getenv s)
#+clozure (ccl:getenv s)
#+cmucl (cdr (assoc (intern s :keyword)
ext:*environment-list* :test #'string=))
#+mkcl (mkcl:getenv s)
#+sbcl (sb-ext:posix-getenv s))
#+sbcl
(sb-alien:define-alien-routine system sb-alien:int (command sb-alien:c-string))
#-sbcl
(defun system (cmd)
(declare (string cmd))
#+abcl (ext:run-shell-command cmd)
#+allegro (excl:shell cmd)
#+clisp (ext:shell cmd)
#+(or clasp ecl) (ext:system cmd)
#+clozure (ccl::os-command cmd)
#+cmucl (ext:run-program "sh" (list "-c" cmd) :output t)
#+mkcl (mkcl:system cmd))
(defun string=split (s sep)
(declare (string s) (character sep))
(let ((s s) (r '()))
(loop
(let ((i (string-index s sep)))
; return not in subform tail call, but ok since we won't be translating this to Scheme
(unless i (push s r) (return (nreverse r)))
(push (subseq s 0 i) r)
(setq s (subseq s (1+ i)))))))
(defun system-with-visual (cmd)
(declare (string cmd))
(cond #+(or ecl mkcl)
(t (let ((s (string=split cmd #\space)))
(#+ecl ext:run-program #+mkcl mkcl:run-program
(car s) (cdr s) :input t :output t)))
(t (system cmd))))
(defun sys-copy-file (src dst)
(system (string-append #-windows "cp -p" #+windows "copy/b"
" " src " " dst)))
(defparameter *tex2page-file-arg*
(or #+abcl (nth 0 ext:*command-line-argument-list*)
#+clasp (elt core:*command-line-arguments* 0)
#+clisp (nth 1 ext:*args*)
#+clozure (nth 6 ccl:*command-line-argument-list*)
#+cmucl (nth 6 ext:*command-line-strings*)
#+ecl (nth 3 (ext:command-args))
#+mkcl (nth 4 (si:command-args))
#+sbcl (nth 1 sb-ext:*posix-argv*)
(retrieve-env "T2PARG")))
(defparameter *common-lisp-version*
(string-append (lisp-implementation-type) " "
(lisp-implementation-version) " "
#+linux "Linux"
#+cygwin "Cygwin"
#+darwin "Mac OS"
#+sunos "Solaris"
#+(and unix (not (or linux cygwin darwin sunos))) "Unix"
#+windows "Windows"))
(defparameter *epoch-year* 1900)
(defparameter *month-names*
(vector "January" "February" "March" "April" "May" "June" "July" "August"
"September" "October" "November" "December"))
(defparameter *short-month-names*
(vector "Jan" "Feb" "March" "April" "May" "June"
"July" "Aug" "Sept" "Oct" "Nov" "Dec"))
(defparameter *week-day-names*
(vector "Sun" "Mon" "Tues" "Wed" "Thurs" "Fri" "Sat"))
(defparameter *enable-write-18-p*
;true if you want \write18{command} to execute command as an OS
;command; false if you think that it is a security risk for your
;situation
t)
(defparameter *output-extension* ".html")
(defparameter *ghostscript*
#-windows "gs"
#+windows
(or
(some (lambda (f) (and (probe-file f) f))
'("c:\\cygwin\\bin\\gs.exe" "g:\\cygwin\\bin\\gs.exe"
"c:\\aladdin\\gs6.01\\bin\\gswin32c.exe"
"d:\\aladdin\\gs6.01\\bin\\gswin32c.exe"
"d:\\gs\\gs8.00\\bin\\gswin32.exe"
"g:\\gs\\gs8.00\\bin\\gswin32.exe"))
"gswin32.exe"))
(defparameter *use-closing-p-tag-p* t)
(defparameter *metapost* #-windows "mpost" #+windows "mp")
(defparameter *navigation-sentence-begin* "Go to ")
(defparameter *navigation-first-name* "first")
(defparameter *navigation-previous-name* "previous")
(defparameter *navigation-next-name* "next")
(defparameter *navigation-page-name* " page")
(defparameter *navigation-contents-name* "contents")
(defparameter *navigation-index-name* "index")
(defparameter *navigation-sentence-end* "")
(defparameter *last-modified* "Last modified")
(defparameter *html-conversion-by* "HTML conversion by")
(defparameter *doctype* "html")
(defparameter *path-separator* #-windows #\: #+windows #\;)
(defparameter *directory-separator* #-windows "/" #+windows "\\")
(defparameter *int-corresp-to-0* (char-code #\0))
(defparameter *int-corresp-to-small-commercial-at* #xfe6b)
;use only when @ is used as letter
(defparameter *small-commercial-at* (code-char *int-corresp-to-small-commercial-at*))
(defparameter *verbatim-visible-space*
; for the likes of verb* and {verbatim*}
"<span style=\"color: red\">·</span>"
;"<span style=\"vertical-align: -0.5ex\">⌴</span>"
)
(defparameter *aux-file-suffix* "-Z-A.lisp")
(defparameter *bib-aux-file-suffix* "-Z-B")
(defparameter *css-file-suffix* "-Z-S.css")
;(defparameter *html-node-prefix* "node_")
(defparameter *html-node-prefix* "TAG:__tex2page_")
(defparameter *html-page-suffix* "-Z-H-")
(defparameter *img-file-suffix* "-Z-G-")
(defparameter *imgdef-file-suffix* "D-")
(defparameter *index-file-suffix* "-Z-I")
(defparameter *label-file-suffix* "-Z-L.lisp")
(defparameter *mfpic-tex-file-suffix* ".Z-M-tex")
(defparameter *toc-file-suffix* "-Z-C")
(defparameter *ghostscript-options*
" -q -dBATCH -dNOPAUSE -dNO_PAUSE -sDEVICE=ppmraw")
;Not using #. because some Schemes choke on #\nul.
(defparameter *invisible-space* (code-char 0))
(defparameter *if-aware-ctl-seqs*
'("\\csname" "\\else" "\\end" "\\eval" "\\fi" "\\let"))
(defparameter *tex-logo*
(string-append "T" "<span style=\""
"position: relative; "
"top: 0.5ex; "
"margin-left: -0.1667em; "
"margin-right: -0.125em; "
"text-transform: uppercase"
"\">e</span>" "X"))
(defparameter *tex-files-to-ignore*
'("btxmac" "eplain" "epsf" "lmfonts" "mfpic" "supp-pdf"))
;(defparameter *esc-char-initex* #\\)
;(defparameter *esc-char-universal* #\Ǝ)
(defparameter **escape** 0)
(defparameter **bgroup** 1)
(defparameter **egroup** 2)
(defparameter **math** 3)
(defparameter **alignment** 4)
(defparameter **eol** 5)
(defparameter **parameter** 6)
(defparameter **superscript** 7)
(defparameter **subscript** 8)
(defparameter **ignore** 9)
(defparameter **space** 10)
(defparameter **letter** 11)
(defparameter **other** 12)
(defparameter **active** 13)
(defparameter **comment** 14)
(defparameter *catcodes*
(list
;Set by tex2page
;(cons *esc-char-universal* 0)
;
;TeXbook, p 343
;Set by INITEX
(cons #\\ **escape**)
(cons #\space **space**)
(cons #\% **comment**)
(cons (code-char 0) **ignore**)
(cons #\return **eol**)
(cons #\newline **eol**) ;TeX seems to read #\newline as #\return
;Set by plain
(cons #\{ **bgroup**) ;begin group
(cons #\} **egroup**) ;end group
(cons #\$ **math**) ;math shift
(cons #\& **alignment**) ;alignment tab
(cons #\# **parameter**) ;macro parameter
(cons #\^ **superscript**)
(cons #\_ **subscript**)
(cons #\tab **space**)
(cons #\~ **active**) ;tilde is active
))
;above are true globals. Following are
;per-document globals
(defvar *afterassignment* nil)
(defvar *afterpar* '())
(defvar *afterbye* '())
(defvar *aux-dir* nil)
(defvar *aux-dir/* "")
(defvar *aux-dir-absolute-p* nil)
(defvar *aux-stream* nil)
(defvar *basic-style* "")
(defvar *bib-aux-stream* nil)
(defvar *bibitem-num* 0)
(defvar *color-names* '())
(defvar *css-stream* nil)
(defvar *current-source-file* nil)
(defvar *current-tex2page-input* nil)
(defvar *display-justification* nil)
(defvar *dotted-counters* nil)
(defvar *dumping-nontex-p* nil)
(defvar *emit-enabled-p* t)
(defvar *equation-number* nil)
(defvar *equation-numbered-p* t)
(defvar *equation-position* 0)
(defvar *esc-char-verb* #\|)
(defvar *expand-escape-p* nil)
(defvar *external-label-tables* nil)
(defvar *filename-delims* '())
(defvar *footnote-list* '())
(defvar *footnote-sym* 0)
(defvar *global-texframe* nil)
(defvar *graphics-file-extensions* '())
(defvar *html* nil)
(defvar *html-head* nil)
(defvar *html-only* 0)
(defvar *html-page* nil)
(defvar *html-page-count* nil)
(defvar *ignore-timestamp-p* nil)
(defvar *img-file-count* 0)
(defvar *img-file-tally* 0)
(defvar *imgdef-file-count* 0)
(defvar *imgpreamble* nil)
(defvar *imgpreamble-inferred* nil)
(defvar *in-alltt-p* nil)
(defvar *in-display-math-p* nil)
(defvar *in-para-p* nil)
(defvar *in-para-started-p* nil)
(defvar *in-small-caps-p* nil)
(defvar *includeonly-list* nil)
(defvar *index-count* nil)
(defvar *index-page* nil)
(defvar *index-page-mention-alist* nil)
(defvar *index-stream* nil)
(defvar *index-table* nil)
(defvar *infructuous-calls-to-tex2page* nil)
(defvar *input-line-no* 0)
(defvar *input-streams* nil)
(defvar *inputting-boilerplate-p* nil)
(defvar *inside-appendix-p* nil)
(defvar *inside-eplain-verbatim-p* nil)
(defvar *jobname* nil)
(defvar *label-stream* nil)
(defvar *label-source* nil)
(defvar *label-table* nil)
(defvar *last-modification-time* nil)
(defvar *last-page-number* nil)
(defvar *latex-probability* nil)
(defvar *ligatures-p* nil)
(defvar *loading-external-labels-p* nil)
(defvar *log-file* nil)
(defvar *log-stream* nil)
(defvar *main-tex-file* nil)
(defvar *math-delim-left* nil)
(defvar *math-delim-right* nil)
(defvar *math-height* nil)
(defvar *math-mode-p* nil)
(defvar *math-needs-image-p* nil)
(defvar *math-font* nil)
(defvar *math-script-mode-p* nil)
(defvar *mfpic-file-num* nil)
(defvar *mfpic-file-stem* nil)
(defvar *mfpic-stream* nil)
(defvar *missing-eps-files* nil)
(defvar *missing-pieces* nil)
(defvar *mp-files* nil)
(defvar *not-processing-p* nil) ;mark for oblivion
(defvar *opmac-active-tt-char* nil)
(defvar *opmac-index-sub-table* nil)
(defvar *opmac-list-style* #\o)
(defvar *opmac-nonum-p* nil)
(defvar *opmac-notoc-p* nil)
(defvar *opmac-verbinput-table* nil)
(defvar *outer-p* t)
(defvar *output-streams* nil)
(defvar *outputting-external-title-p* nil)
(defvar *outputting-to-non-html-p* nil)
(defvar *quote-level* 0)
(defvar *reading-control-sequence-p* nil)
(defvar *recent-node-name* nil)
(defvar *remember-index-number* nil)
(defvar *redirect-delay* nil)
(defvar *redirect-url* nil)
(defvar *reg-num-count* 0)
(defvar *scm-builtins* nil)
(defvar *scm-dribbling-p* nil)
(defvar *scm-special-symbols* nil)
(defvar *scm-keywords* nil)
(defvar *scm-variables* nil)
(defvar *scripts* nil)
(defvar *section-counters* nil)
(defvar *section-counter-dependencies* nil)
(defvar *slatex-math-escape* nil)
(defvar *source-changed-since-last-run-p* nil)
(defvar *start-time* 0)
(defvar *stylesheets* nil)
(defvar *subjobname* *jobname*)
(defvar *tabular-stack* '())
(defvar *temp-string-count* 0)
(defvar *temporarily-use-utf8-for-math-p* nil)
(defvar *tex-env* '())
(defvar *tex-format* nil)
(defvar *tex-if-stack* '())
(defvar *tex-output-format* nil)
(defvar *tex2page-inputs* '())
(defvar *this-package* *package*)
(defvar *title* nil)
(defvar *toc-list* nil)
(defvar *toc-page* nil)
(defvar *unresolved-xrefs* nil)
(defvar *using-bibliography-p* nil)
(defvar *using-chapters-p* nil)
(defvar *using-index-p* nil)
(defvar *verb-display-p* nil)
(defvar *verb-stream* nil)
(defvar *verb-visible-space-p* nil)
(defvar *verb-written-files* '())
(defvar *write-log-max* 55)
(defvar *write-log-index* 0)
(defvar *write-log-possible-break-p* nil)
(defvar *scm-token-delims*
(list #\( #\) #\[ #\] #\{ #\} #\' #\` #\" #\; #\, #\|))
(defstruct counter* (value 0) (within nil))
(defstruct tocentry* level number page label header)
(defstruct istream* (stream nil) (buffer '()))
(defstruct ostream* (stream nil) (hbuffer '()))
(defstruct texframe*
(definitions (make-hash-table :test #'equal))
(cdefinitions (make-hash-table))
(chardefs (make-hash-table :test #'equal))
(countdefs (make-hash-table :test #'equal))
(counts (make-hash-table))
(dimendefs (make-hash-table :test #'equal))
(dimens (make-hash-table))
(toksdefs (make-hash-table :test #'equal))
(tokses (make-hash-table))
(boxes (make-hash-table :test #'equal))
(istreams (make-hash-table))
(ostreams (make-hash-table))
(postludes '())
(uccodes (make-hash-table))
(lccodes (make-hash-table))
(catcodes '())
(aftergroups '()))
(defstruct tdef*
(argpat '())
(expansion "")
(optarg nil)
(thunk nil)
(prim nil)
(defer nil)
(catcodes nil))
(defstruct cdef*
(argpat nil)
(expansion nil)
(optarg nil)
(active nil)
(catcodes nil))
(defstruct footnotev* mark text tag caller)
(defstruct label* (src nil) page name value)
(defun gen-temp-string ()
(incf *temp-string-count*)
(string-append "Temp_" (write-to-string *temp-string-count*)))
(defun file-stem-name (f)
(declare (string f))
(let ((slash (string-reverse-index f #\/)))
(when slash (setq f (subseq f (1+ slash))))
(let ((dot (string-reverse-index f #\.)))
(if (and dot (> dot 0))
(subseq f 0 dot)
f))))
(defun file-extension (f)
(declare (string f))
(let ((slash (string-reverse-index f #\/))
(dot (string-reverse-index f #\.)))
(and dot
(not (= dot 0))
(or (not slash) (< (1+ slash) dot))
(subseq f dot))))
(defun ensure-file-deleted (f)
(declare (string f))
(when (probe-file f) (delete-file f)))
(defun write-aux (e)
(unless *aux-stream*
(let ((f (string-append *aux-dir/* *jobname* *aux-file-suffix*)))
(ensure-file-deleted f)
(setq *aux-stream* (open f :direction :output))))
(prin1 e *aux-stream*) (terpri *aux-stream*))
(defun write-label (e)
(unless *label-stream*
(let ((f (string-append *aux-dir/* *jobname* *label-file-suffix*)))
(ensure-file-deleted f)
(setq *label-stream* (open f :direction :output))))
(prin1 e *label-stream*)
(terpri *label-stream*))
(defun write-bib-aux (x)
(unless *bib-aux-stream*
(let ((f (string-append *aux-dir/* *jobname* *bib-aux-file-suffix* ".aux")))
(ensure-file-deleted f)
(setq *bib-aux-stream* (open f :direction :output))))
(princ x *bib-aux-stream*))
(defun write-log (x &optional log-file-only-p)
(unless *log-stream*
(setq *log-file* (string-append *aux-dir/* *jobname* ".hlog"))
(ensure-file-deleted *log-file*)
(setq *log-stream* (open *log-file* :direction :output)))
(when (and *write-log-possible-break-p* (characterp x)
(member x '(#\) #\] #\} #\,) :test #'char=))
(setq *write-log-possible-break-p* nil))
(when (and *write-log-possible-break-p* (> *write-log-index* *write-log-max*))
(terpri *log-stream*)
(unless log-file-only-p (terpri))
(setq *write-log-possible-break-p* nil
*write-log-index* 0))
(unless (and (= *write-log-index* 0)
(member x '(:separation-newline :separation-space)))
(case x
((#\newline :separation-newline)
(when *write-log-possible-break-p*
(setq *write-log-possible-break-p* nil))
(terpri *log-stream*)
(unless log-file-only-p (terpri))
(setq *write-log-index* 0))
(:separation-space (setq *write-log-possible-break-p* t))
(t (when *write-log-possible-break-p*
(write-char #\space *log-stream*)
(unless log-file-only-p (write-char #\space))
(setq *write-log-index* (1+ *write-log-index*))
(setq *write-log-possible-break-p* nil))
(princ x *log-stream*)
(unless log-file-only-p (princ x)
(force-output))
(incf *write-log-index*
(typecase x
(character 1)
(number (string-length (write-to-string x)))
(string (string-length x))
(t 1)))))))
;(trace write-log)
(defun display-error-context-lines ()
(let ((n (or (find-count "\\errorcontextlines") 0)))
(when (and *current-source-file* (> n 0))
(let* ((n1 (max 0 (- *input-line-no* (floor (1- n) 2))))
(nf (+ n1 n -1))
(ll (with-open-file (ip *current-source-file* :direction :input)
(let ((i 1) (ll '()))
(loop (let ((L (read-line ip nil)))
(cond ((not L) (return ll))
((< i n1) (incf i))
((<= i nf) (incf i)
(push (cons i L) ll))
(t (return ll)))))))))
(unless (null ll)
(let* ((border "__________________________...")
(only-1-p (= (list-length ll) 1))
(nf (caar ll))
(ll (nreverse ll))
(n1 (caar ll)))
(write-log "Likely error context: ")
(write-log *current-source-file*)
(write-log ", line")
(unless only-1-p (write-log "s"))
(write-log " ")
(write-log n1)
(unless only-1-p
(write-log "-")
(write-log nf))
(write-log ":")
(write-log #\newline)
(write-log " /")
(write-log border)
(write-log #\newline)
(mapc
(lambda (L)
(write-log " | ")
(write-log (cdr L))
(write-log #\newline))
ll)
(write-log " |")
(write-log border)
(write-log #\newline)
(write-log "/")))))))
(defun edit-offending-file ()
(let ((calling-from-text-editor-p (retrieve-env "VIMRUNTIME")) it)
(unless calling-from-text-editor-p
(princ "Type E to edit your file, X to quit.")
(terpri)
(princ "? ")
(force-output)
(let ((c (read-char nil nil)))
(when (and c (char-equal c #\e))
(let ((texedit-string (retrieve-env "TEXEDIT"))
ill-formed-texedit-p)
(when texedit-string
(cond ((setq it (search "%d" texedit-string))
(setq texedit-string (string-append (subseq texedit-string 0 it)
(write-to-string *input-line-no*)
(subseq texedit-string (+ it 2)))))
(t (setq ill-formed-texedit-p t texedit-string nil))))
(when texedit-string
(cond ((setq it (search "%s" texedit-string))
(setq texedit-string (string-append (subseq texedit-string 0 it)
*current-source-file*
(subseq texedit-string (+ it 2)))))
(t (setq ill-formed-texedit-p t texedit-string nil))))
(unless texedit-string
(when ill-formed-texedit-p
(princ "Ill-formed TEXEDIT; using EDITOR.")
(terpri))
(setq texedit-string
(string-append (or (retrieve-env "EDITOR") "vi")
" +" (write-to-string *input-line-no*)
" " *current-source-file*)))
(when texedit-string
(system-with-visual texedit-string))))))))
(defun trace-if (write-p &rest args)
(when write-p
(write-log :separation-newline)
(when (> *input-line-no* 0)
(write-log "l.")
(write-log *input-line-no*)
(write-log #\space))
(mapc #'write-log args)
(write-log :separation-newline)))
(defun terror (where &rest args)
(write-log :separation-newline)
(write-log "! ")
(mapc #'write-log args)
(write-log :separation-newline)
(write-log *current-source-file*)
(write-log #\:)
(write-log *input-line-no*)
(write-log ": error")
(write-log :separation-newline)
(write-log "l.")
(write-log *input-line-no*)
(write-log #\space)
(write-log where)
(write-log " failed.")
(write-log :separation-newline)
(display-error-context-lines)
(close-all-open-streams)
(output-stats)
(edit-offending-file)
(error "TeX2page fatal error"))
(defun do-errmessage ()
(write-log :separation-newline)
(write-log "! ")
(write-log (tex-string-to-html-string (get-group)))
(write-log :separation-newline)
(terror 'do-errmessage))
(defun do-tracingall ()
(plain-count "\\tracingcommands" 1 nil)
(plain-count "\\tracingmacros" 1 nil))
(defun call-with-input-file/buffered (f th)
(declare (string f) (function th))
(unless (probe-file f)
(terror 'call-with-input-file/buffered "I can't find file " f))
(with-open-file (i f :direction :input)
(let ((*current-tex2page-input* (make-istream* :stream i))
(*current-source-file* f)
(*input-line-no* 1))
(funcall th))))
(defun call-with-input-string/buffered (s th)
(declare (string s) (function th))
(let ((*current-tex2page-input* (make-istream* :buffer (string->list s)))
(*input-line-no* *input-line-no*))
(funcall th)))
(defun snoop-char ()
(let ((c (get-char)))
(toss-back-char c)
c))
(defun get-char ()
(let ((b (istream*-buffer *current-tex2page-input*)))
(if (null b)
(let ((p (istream*-stream *current-tex2page-input*)))
(if (not p) nil
(let ((c (read-char p nil)))
(cond ((not c) c)
((char= c #\newline)
(incf *input-line-no*) c)
(t c)))))
(let ((c (car b)))
(setf (istream*-buffer *current-tex2page-input*) (cdr b))
c))))
(defun get-char-mod-doublehat ()
(let ((c (get-char)))
(cond ((not c) c)
((= (catcode c) **superscript**)
(let ((c2 (get-char)))
(cond ((and (characterp c2) (char= c2 c))
(let* ((c3 (get-char))
(c3-code (and (characterp c3) (char-code c3))))
(cond ((numberp c3-code)
(code-char (if (>= c3-code 64) (- c3-code 64)
(+ c3-code 64))))
(t (toss-back-char c3) (toss-back-char c2) c))))
(t (toss-back-char c2) c))))
(t c))))
(defun toss-back-string (s)
(declare (string s))
(setf (istream*-buffer *current-tex2page-input*)
(nconc (string->list s)
(istream*-buffer *current-tex2page-input*))))
(defun toss-back-char (c)
(push c (istream*-buffer *current-tex2page-input*)))
(defun snoop-actual-char ()
(let ((c (snoop-char)))
(cond ((not c) c)
((= (catcode c) **ignore**) (get-char)
;(check-outerness c)
(snoop-actual-char))
((char= c #\return) (get-char)
(let ((c (snoop-actual-char)))
(if (and c (char= c #\newline)) c
(progn (toss-back-char #\newline) #\newline))))
(t c))))
(defun get-actual-char ()
(let ((c (get-char)))
(cond ((not c) c)
((= (catcode c) **ignore**)
;(check-outerness c)
(get-actual-char))
((char= c #\return)
(let ((c (snoop-actual-char)))
(if (and c (char= c #\newline))
(get-actual-char) #\newline)))
(t c))))
(defun get-line ()
(let ((r '()))
(loop (let ((c (get-actual-char)))
(cond ((not c)
(return (if r (list->string (nreverse r)) c)))
((char= c #\newline)
(return (list->string (nreverse r))))
(t (push c r)))))))
(defun char-whitespace-p (c)
(or (char= c #\space) (char= c #\tab)
(not (graphic-char-p c))))
(defun ignorespaces (&optional (newlines :stop-before-par))
;(format t "ignorespaces ~s~%" newlines)
; :stop-before-first-newline
; :stop-after-first-newline
; :stop-before-par : eat non-newline spaces after 1st newline.
; if 2nd newline found, add another to it to retain \par
; :all : eat all whitespace
;
(unless (/= (catcode #\space) **space**)
(let ((newline-active-p (/= (catcode #\newline) **eol**))
(num-newlines-read 0)
;(num-spaces-read 0)
c)
(loop
(setq c (snoop-char))
;(format t "c = ~s~%" c)
(when (eql c #\return) (setq c (snoop-actual-char)))
(cond ((not c) (return))
((= (catcode c) **ignore**)
(get-char)
(when *reading-control-sequence-p* (return)))
((char= c #\newline)
(if newline-active-p (return)
(case newlines
(:stop-before-first-newline (return))
(:stop-after-first-newline (get-actual-char) (return))
(:stop-before-par
(case num-newlines-read
(0 (get-actual-char) (incf num-newlines-read))
(t (toss-back-char #\newline) (return))))
(t (get-actual-char)))))
((char-whitespace-p c)
;(incf num-spaces-read)
(get-actual-char))
(t (return))))
;(format t "num-spaces-read = ~s~%" num-spaces-read)
)))
;(trace ignorespaces)
(defun munch-newlines ()
(let ((n 0))
(loop (let ((c (snoop-actual-char)))
(cond ((not c) (return n))
((char= c #\newline) (get-actual-char) (incf n))
((char-whitespace-p c) (get-actual-char))
(t (return n)))))))
(defun munched-a-newline-p ()
(loop (let ((c (snoop-actual-char)))
(cond ((not c) (return nil))
((char= c #\newline) (get-actual-char) (return t))
((char-whitespace-p c) (get-actual-char))
(t (return nil))))))
(defun do-xspace ()
(let ((c (snoop-actual-char)))
(unless (member c '(#\space #\" #\. #\! #\, #\: #\; #\? #\/ #\' #\) #\-))
(emit-space #\space))))
(defun do-relax () t)
(defun get-ctl-seq ()
(ignorespaces)
; (format t "get-ctl-seq catat is ~s~%" (catcode #\@))
(let ((bs (get-actual-char)))
(unless (= (catcode bs) **escape**)
(terror 'get-ctl-seq "Missing control sequence (" bs ")"))
(let ((c (get-char-mod-doublehat)))
(cond ((not c) "\\ ")
((= (catcode c) **ignore**) "\\ ")
((= (catcode c) **letter**)
(when (char= c #\@) (setq c *small-commercial-at*))
(list->string
(nreverse
(let ((s (list c #\\)))
(loop
(let ((c (get-char-mod-doublehat)))
(if c (let ((c-catcode (catcode c)))
(cond ((= c-catcode **ignore**)
(toss-back-char c)
(return s))
((= c-catcode **letter**)
(when (char= c #\@) (setq c *small-commercial-at*))
(push c s))
(t (toss-back-char c)
(unless *not-processing-p*
(ignorespaces :stop-before-first-newline))
(return s))))
(return s))))))))
(t (list->string (list #\\ c)))))))
;(trace get-ctl-seq)
(defun ctl-seq-p (z)
(char= (char z 0) #\\))
(defun if-aware-ctl-seq-p (z)
(or (member z *if-aware-ctl-seqs* :test #'string=)
(and (>= (string-length z) 3) (char= (char z 1) #\i) (char= (char z 2) #\f))
(let ((z-th (find-corresp-prim-thunk z)))
(if (stringp z-th) nil
(some (lambda (y) (eq z-th (find-corresp-prim-thunk y)))
*if-aware-ctl-seqs*)))))
(defun get-group-as-reversed-chars ()
(ignorespaces)
; (format t "ggarc catat is ~s~%" (catcode #\@))
(let ((c (get-actual-char)))
(when (not c) (terror 'get-group "Runaway argument?"))
(unless (char= c #\{) (terror 'get-group "Missing {"))
(let ((s (list c)) (nesting 0) (escape-p nil))
(loop
(let ((c (get-actual-char)))
(when (not c)
(terror 'get-group "Runaway argument?"))
(cond (escape-p
(when (and (char= c #\@) (= (catcode c) **letter**))
(setq c *small-commercial-at*))
(push c s) (setq escape-p nil))
((= (catcode c) **escape**)
(if *expand-escape-p*
(let ((s1 (progn
(toss-back-char c)
(let ((x (get-ctl-seq)))
(cond ((member x '("\\ " "\\{" "\\}") :test #'string=)
(list->string
(list (char x 1))))
(t (tex-string-to-html-string x)))))))
(setq s (nconc (nreverse (string->list s1)) s)
escape-p nil))
(progn (push c s)
(setq escape-p t))))
((= (catcode c) **comment**)
(eat-till-eol))
((char= c #\@)
(push (if (= (catcode c) **letter**) *small-commercial-at* c) s)
)
((char= c #\{)
(push c s) (incf nesting) )
((char= c #\})
(push c s)
(if (= nesting 0) (return s)
(progn (decf nesting) )))
(t (push c s)
)))))))
; (trace get-group-as-reversed-chars)
(defun get-group ()
(list->string (nreverse (get-group-as-reversed-chars))))
(defun string-trim-blanks (s)
(string-trim '(#\space #\Tab #\newline #\Return) s))
(defun get-peeled-group () (string-trim-blanks (ungroup (get-group))))
(defun get-token-or-peeled-group () (string-trim-blanks (ungroup (get-token))))
(defun get-grouped-environment-name-if-any ()
(let ((c (snoop-actual-char)))
(if (or (not c) (not (char= c #\{))) nil
(progn
(get-actual-char)
(let ((s '()))
(loop (let ((c (snoop-actual-char)))
(cond ((or (alpha-char-p c) (char= c #\*))
(get-actual-char) (push c s))
((and (consp s) (char= c #\}))
(get-actual-char)
(return (list->string (nreverse s))))
(t (mapc #'toss-back-char s)
(toss-back-char #\{)
(return nil))))))))))
;(trace get-grouped-environment-name-if-any)
(defun get-bracketed-text-if-any ()
(ignorespaces)
(let ((c (snoop-actual-char)))
(if (or (not c) (not (char= c #\[))) nil
(progn
(get-actual-char)
(list->string
(nreverse
(let ((s '()) (nesting 0) (escape-p nil))
(loop
(let ((c (get-actual-char)))
(when (not c)
(terror 'get-bracketed-text-if-any
"Runaway argument?"))
(cond (escape-p
(push c s) (setq escape-p nil))
((= (catcode c) **escape**)
(push c s) (setq escape-p t))
((char= c #\{)
(push c s) (incf nesting))
((char= c #\})
(push c s) (decf nesting))