text: /*@ S-nail - a mail user agent derived from Berkeley Mail.
   *@ struct quoteflt: quotation (sub) filter.
   *
   * Copyright (c) 2012/3 - 2020 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
   * SPDX-License-Identifier: ISC
   *
   * Permission to use, copy, modify, and/or distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  #ifndef mx_FILTER_QUOTE_H
  #define mx_FILTER_QUOTE_H
  
  #include <mx/nail.h>
  
  #if defined mx_HAVE_FILTER_QUOTE_FOLD && defined mx_HAVE_C90AMEND1
  # include <wchar.h>
  #endif
  
  #define mx_HEADER
  #include <su/code-in.h>
  
  struct quoteflt;
  
  struct quoteflt{
     FILE *qf_os; /* Output stream */
     char const *qf_pfix;
     u32 qf_pfix_len; /* Length of prefix: 0: bypass */
     u32 qf_qfold_min; /* Simple way: wrote prefix? */
     boole qf_bypass; /* Simply write to .qf_os TODO BYPASS, then! */
     /* TODO quoteflt.qf_nl_last is a hack that i have introduced so that we
      * TODO finally can gracefully place a newline last in the visual display.
      * TODO I.e., for cases where quoteflt shouldn't be used at all  */
     boole qf_nl_last; /* Last thing written/seen was NL */
  #ifndef mx_HAVE_FILTER_QUOTE_FOLD
     u8 qf__dummy[6];
  #else
     u8 qf_state; /* *quote-fold* state machine */
     boole qf_brk_isws; /* Breakpoint is at WS */
     u32 qf_qfold_max; /* Otherwise: line lengths */
     u32 qf_qfold_maxnws;
     u32 qf_wscnt; /* Whitespace count */
     char const *qf_quote_chars; /* *quote-chars* */
     u32 qf_brkl; /* Breakpoint */
     u32 qf_brkw; /* Visual width, breakpoint */
     u32 qf_datw; /* Current visual output line width */
     u8 qf__dummy2[4];
     struct str qf_dat; /* Current visual output line */
     struct str qf_currq; /* Current quote, compressed */
     mbstate_t qf_mbps[2];
  #endif
  };
  
  EXPORT struct quoteflt *quoteflt_dummy(void); /* TODO LEGACY */
  EXPORT void quoteflt_init(struct quoteflt *self, char const *prefix,
        boole bypass);
  EXPORT void quoteflt_destroy(struct quoteflt *self);
  EXPORT void quoteflt_reset(struct quoteflt *self, FILE *f);
  EXPORT sz quoteflt_push(struct quoteflt *self, char const *dat, uz len);
  EXPORT sz quoteflt_flush(struct quoteflt *self);
  
  #include <su/code-ou.h>
  #endif /* mx_FILTER_QUOTE_H */
  /* s-it-mode */
  