extern.h

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Exported function prototypes.
   3  *
   4  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   5  * Copyright (c) 2012 - 2013 Steffen "Daode" Nurpmeso <sdaoden@users.sf.net>.
   6  */
   7 /*-
   8  * Copyright (c) 1992, 1993
   9  * The Regents of the University of California.  All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *    This product includes software developed by the University of
  22  *    California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  */
  39
  40 /*
  41  * TODO Convert optional utility+ functions to n_*(); ditto
  42  * TODO else use generic module-specific prefixes: str_(), am[em]_, sm[em]_, ..
  43  */
  44 /* TODO s-it-mode: not really (docu, funnames, funargs, etc) */
  45
  46 #undef FL
  47 #ifndef HAVE_AMALGAMATION
  48 # define FL extern
  49 #else
  50 # define FL static
  51 #endif
  52
  53 /*
  54  * acmava.c
  55  */
  56
  57 /* Assign a value to a variable, return wether error occurred */
  58 FL bool_t   var_assign(char const *name, char const *value);
  59 #define assign(N,V)              var_assign(N, V)
  60
  61 /* Unset variable (special: normally `var_assign(, NULL)' is used), return
  62  * wether error occurred */
  63 FL bool_t   var_unset(char const *name);
  64 #define unset_internal(V)        var_unset(V)
  65
  66 /* Get the value of an option (fallback to `look_environ'?) */
  67 FL char *   var_lookup(char const *name, bool_t look_environ);
  68 #define value(V)                 var_lookup(V, TRU1)  /* TODO legacy */
  69 #define boption(V)               (!!value(V))
  70 #define voption(V)               value(V)
  71
  72 /* List all variables */
  73 FL void     var_list_all(void);
  74
  75 FL int      cdefine(void *v);
  76 FL int      cundef(void *v);
  77 FL int      ccall(void *v);
  78 FL int      callhook(char const *name, int newmail);
  79
  80 /* List all macros */
  81 FL int      cdefines(void *v);
  82
  83 /* `account' */
  84 FL int      c_account(void *v);
  85
  86 /* `localopts' */
  87 FL int      c_localopts(void *v);
  88
  89 /*
  90  * attachments.c
  91  */
  92
  93 /* Try to add an attachment for *file*, file_expand()ed.
  94  * Return the new head of list *aphead*, or NULL.
  95  * The newly created attachment will be stored in **newap*, if given */
  96 FL struct attachment *  add_attachment(struct attachment *aphead, char *file,
  97                            struct attachment **newap);
  98
  99 /* Append comma-separated list of file names to the end of attachment list */
 100 FL struct attachment *  append_attachments(struct attachment *aphead,
 101                            char *names);
 102
 103 /* Interactively edit the attachment list, return the new list head */
 104 FL struct attachment *  edit_attachments(struct attachment *aphead);
 105
 106 /*
 107  * auxlily.c
 108  */
 109
 110 /* Announce a fatal error (and die) */
 111 FL void        panic(char const *format, ...);
 112 #ifdef HAVE_DEBUG
 113 FL void        warn(char const *format, ...);
 114 #endif
 115
 116 /* Provide BSD-like signal() on all (POSIX) systems */
 117 FL sighandler_type safe_signal(int signum, sighandler_type handler);
 118
 119 /* Hold *all* signals but SIGCHLD, and release that total block again */
 120 FL void        hold_all_sigs(void);
 121 FL void        rele_all_sigs(void);
 122
 123 /* Hold HUP/QUIT/INT */
 124 FL void        hold_sigs(void);
 125 FL void        rele_sigs(void);
 126
 127 FL void        touch(struct message *mp);
 128 FL int         is_dir(char const *name);
 129 FL int         argcount(char **argv);
 130 FL char *      colalign(const char *cp, int col, int fill,
 131                   int *cols_decr_used_or_null);
 132
 133 /* Check wether using a pager is possible/makes sense and is desired by user
 134  * (*crt* set); return number of screen lines (or *crt*) if so, 0 otherwise */
 135 FL size_t      paging_seems_sensible(void);
 136
 137 /* Use a pager or STDOUT to print *fp*; if *lines* is 0, they'll be counted */
 138 FL void        page_or_print(FILE *fp, size_t lines);
 139 #define try_pager(FP)            page_or_print(FP, 0) /* TODO obsolete */
 140
 141 FL enum protocol  which_protocol(const char *name);
 142 FL unsigned    pjw(const char *cp);
 143 FL long        nextprime(long n);
 144
 145 /* Check wether *s is an escape sequence, expand it as necessary.
 146  * Returns the expanded sequence or 0 if **s is NUL or PROMPT_STOP if it is \c.
 147  * *s is advanced to after the expanded sequence (as possible).
 148  * If use_prompt_extensions is set, an enum prompt_exp may be returned */
 149 FL int         expand_shell_escape(char const **s,
 150                   bool_t use_prompt_extensions);
 151
 152 /* Get *prompt*, or '& ' if *bsdcompat*, of '? ' otherwise */
 153 FL char *      getprompt(void);
 154
 155 /* Detect and query the hostname to use */
 156 FL char *      nodename(int mayoverride);
 157
 158 /* Try to lookup a variable named "password-*token*".
 159  * Return NULL or salloc()ed buffer */
 160 FL char *      lookup_password_for_token(char const *token);
 161
 162 /* Get a (pseudo) random string of *length* bytes; returns salloc()ed buffer */
 163 FL char *      getrandstring(size_t length);
 164
 165 #define Hexchar(n)               ((n)>9 ? (n)-10+'A' : (n)+'0')
 166 #define hexchar(n)               ((n)>9 ? (n)-10+'a' : (n)+'0')
 167
 168 #ifdef HAVE_MD5
 169 /* Store the MD5 checksum as a hexadecimal string in *hex*, *not* terminated */
 170 # define MD5TOHEX_SIZE           32
 171 FL char *      md5tohex(char hex[MD5TOHEX_SIZE], void const *vp);
 172
 173 /* CRAM-MD5 encode the *user* / *pass* / *b64* combo */
 174 FL char *      cram_md5_string(char const *user, char const *pass,
 175                   char const *b64);
 176 #endif
 177
 178 FL enum okay   makedir(const char *name);
 179 FL enum okay   cwget(struct cw *cw);
 180 FL enum okay   cwret(struct cw *cw);
 181 FL void        cwrelse(struct cw *cw);
 182 FL void        makeprint(struct str const *in, struct str *out);
 183 FL char *      prstr(const char *s);
 184 FL int         prout(const char *s, size_t sz, FILE *fp);
 185
 186 /* Print out a Unicode character or a substitute for it, return 0 on error or
 187  * wcwidth() (or 1) on success */
 188 FL size_t      putuc(int u, int c, FILE *fp);
 189
 190 /* Update *tc* to now; only .tc_time updated unless *full_update* is true */
 191 FL void        time_current_update(struct time_current *tc,
 192                   bool_t full_update);
 193
 194 /* Memory allocation routines; the _safe versions temporarily block signals */
 195 #ifdef HAVE_DEBUG
 196 # define SMALLOC_DEBUG_ARGS      , char const *mdbg_file, int mdbg_line
 197 # define SMALLOC_DEBUG_ARGSCALL  , mdbg_file, mdbg_line
 198 #else
 199 # define SMALLOC_DEBUG_ARGS
 200 # define SMALLOC_DEBUG_ARGSCALL
 201 #endif
 202
 203 FL void *      smalloc_safe(size_t s SMALLOC_DEBUG_ARGS);
 204 FL void *      srealloc_safe(void *v, size_t s SMALLOC_DEBUG_ARGS);
 205 #ifdef notyet
 206 FL void *      scalloc_safe(size_t nmemb, size_t size SMALLOC_DEBUG_ARGS);
 207 #endif
 208 FL void *      smalloc(size_t s SMALLOC_DEBUG_ARGS);
 209 FL void *      srealloc(void *v, size_t s SMALLOC_DEBUG_ARGS);
 210 FL void *      scalloc(size_t nmemb, size_t size SMALLOC_DEBUG_ARGS);
 211
 212 #ifdef HAVE_DEBUG
 213 FL void        sfree(void *v SMALLOC_DEBUG_ARGS);
 214 /* Called by sreset(), then */
 215 FL void        smemreset(void);
 216 /* The *smemtrace* command */
 217 FL int         smemtrace(void *v);
 218 # if 0
 219 #  define MEMCHECK
 220 FL bool_t      _smemcheck(char const *file, int line);
 221 # endif
 222
 223 # define smalloc_safe(SZ)        smalloc_safe(SZ, __FILE__, __LINE__)
 224 # define srealloc_safe(P,SZ)     srealloc_safe(P, SZ, __FILE__, __LINE__)
 225 # define scalloc_safe(N,SZ)      scalloc_safe(N, SZ, __FILE__, __LINE__)
 226 # define smalloc(SZ)             smalloc(SZ, __FILE__, __LINE__)
 227 # define srealloc(P,SZ)          srealloc(P, SZ, __FILE__, __LINE__)
 228 # define scalloc(N,SZ)           scalloc(N, SZ, __FILE__, __LINE__)
 229 # define free(P)                 sfree(P, __FILE__, __LINE__)
 230 # define smemcheck()             _smemcheck(__FILE__, __LINE__)
 231 #endif
 232
 233 /* cache.c */
 234 #ifdef HAVE_IMAP
 235 FL enum okay   getcache1(struct mailbox *mp, struct message *m,
 236                   enum needspec need, int setflags);
 237 FL enum okay   getcache(struct mailbox *mp, struct message *m,
 238                   enum needspec need);
 239 FL void        putcache(struct mailbox *mp, struct message *m);
 240 FL void        initcache(struct mailbox *mp);
 241 FL void        purgecache(struct mailbox *mp, struct message *m, long mc);
 242 FL void        delcache(struct mailbox *mp, struct message *m);
 243 FL enum okay   cache_setptr(int transparent);
 244 FL enum okay   cache_list(struct mailbox *mp, const char *base, int strip,
 245                   FILE *fp);
 246 FL enum okay   cache_remove(const char *name);
 247 FL enum okay   cache_rename(const char *old, const char *new);
 248 FL unsigned long cached_uidvalidity(struct mailbox *mp);
 249 FL FILE *      cache_queue(struct mailbox *mp);
 250 FL enum okay   cache_dequeue(struct mailbox *mp);
 251 #endif /* HAVE_IMAP */
 252
 253 /* cmd1.c */
 254 FL int         ccmdnotsupp(void *v);
 255 FL char const *get_pager(void);
 256 FL int         headers(void *v);
 257 FL int         scroll(void *v);
 258 FL int         Scroll(void *v);
 259 FL int         screensize(void);
 260 FL int         from(void *v);
 261
 262 /* Print out the header of a specific message.
 263  * Note: ensure to call time_current_update() before first use in cycle! */
 264 FL void        printhead(int mesg, FILE *f, int threaded);
 265
 266 FL int         pdot(void *v);
 267 FL int         more(void *v);
 268 FL int         More(void *v);
 269 FL int         type(void *v);
 270 FL int         Type(void *v);
 271 FL int         show(void *v);
 272 FL int         pipecmd(void *v);
 273 FL int         Pipecmd(void *v);
 274 FL int         top(void *v);
 275 FL int         stouch(void *v);
 276 FL int         mboxit(void *v);
 277 FL int         folders(void *v);
 278
 279 /* cmd2.c */
 280 FL int         next(void *v);
 281 FL int         save(void *v);
 282 FL int         Save(void *v);
 283 FL int         copycmd(void *v);
 284 FL int         Copycmd(void *v);
 285 FL int         cmove(void *v);
 286 FL int         cMove(void *v);
 287 FL int         cdecrypt(void *v);
 288 FL int         cDecrypt(void *v);
 289 #ifdef HAVE_DEBUG
 290 FL int         clobber(void *v);
 291 FL int         core(void *v);
 292 #endif
 293 FL int         cwrite(void *v);
 294 FL int         delete(void *v);
 295 FL int         deltype(void *v);
 296 FL int         undeletecmd(void *v);
 297 FL int         retfield(void *v);
 298 FL int         igfield(void *v);
 299 FL int         saveretfield(void *v);
 300 FL int         saveigfield(void *v);
 301 FL int         fwdretfield(void *v);
 302 FL int         fwdigfield(void *v);
 303 FL int         unignore(void *v);
 304 FL int         unretain(void *v);
 305 FL int         unsaveignore(void *v);
 306 FL int         unsaveretain(void *v);
 307 FL int         unfwdignore(void *v);
 308 FL int         unfwdretain(void *v);
 309
 310 /* cmd3.c */
 311 FL int         shell(void *v);
 312 FL int         dosh(void *v);
 313 FL int         help(void *v);
 314
 315 /* Print user's working directory */
 316 FL int         c_cwd(void *v);
 317
 318 /* Change user's working directory */
 319 FL int         c_chdir(void *v);
 320
 321 FL int         respond(void *v);
 322 FL int         respondall(void *v);
 323 FL int         respondsender(void *v);
 324 FL int         followup(void *v);
 325 FL int         followupall(void *v);
 326 FL int         followupsender(void *v);
 327 FL int         preserve(void *v);
 328 FL int         unread(void *v);
 329 FL int         seen(void *v);
 330 FL int         messize(void *v);
 331 FL int         rexit(void *v);
 332 /* Set or display a variable value.  Syntax is similar to that of sh */
 333 FL int         set(void *v);
 334 FL int         unset(void *v);
 335 FL int         group(void *v);
 336 FL int         ungroup(void *v);
 337 FL int         cfile(void *v);
 338 FL int         echo(void *v);
 339 FL int         Respond(void *v);
 340 FL int         Followup(void *v);
 341 FL int         forwardcmd(void *v);
 342 FL int         Forwardcmd(void *v);
 343 FL int         ifcmd(void *v);
 344 FL int         elsecmd(void *v);
 345 FL int         endifcmd(void *v);
 346 FL int         alternates(void *v);
 347 FL int         resendcmd(void *v);
 348 FL int         Resendcmd(void *v);
 349 FL int         newmail(void *v);
 350 FL int         shortcut(void *v);
 351 FL struct shortcut *get_shortcut(const char *str);
 352 FL int         unshortcut(void *v);
 353 FL int         cflag(void *v);
 354 FL int         cunflag(void *v);
 355 FL int         canswered(void *v);
 356 FL int         cunanswered(void *v);
 357 FL int         cdraft(void *v);
 358 FL int         cundraft(void *v);
 359 FL int         cnoop(void *v);
 360 FL int         cremove(void *v);
 361 FL int         crename(void *v);
 362
 363 /* collect.c */
 364
 365 FL FILE *      collect(struct header *hp, int printheaders, struct message *mp,
 366                   char *quotefile, int doprefix);
 367
 368 FL void        savedeadletter(FILE *fp, int fflush_rewind_first);
 369
 370 /* dotlock.c */
 371 FL int         fcntl_lock(int fd, int type);
 372 FL int         dot_lock(const char *fname, int fd, int pollinterval, FILE *fp,
 373                   const char *msg);
 374 FL void        dot_unlock(const char *fname);
 375
 376 /* edit.c */
 377 FL int         editor(void *v);
 378 FL int         visual(void *v);
 379 FL FILE *      run_editor(FILE *fp, off_t size, int type, int readonly,
 380                   struct header *hp, struct message *mp,
 381                   enum sendaction action, sighandler_type oldint);
 382
 383 /*
 384  * filter.c
 385  */
 386
 387 /* Quote filter */
 388 FL struct quoteflt * quoteflt_dummy(void); /* TODO LEGACY */
 389 FL void        quoteflt_init(struct quoteflt *self, char const *prefix);
 390 FL void        quoteflt_destroy(struct quoteflt *self);
 391 FL void        quoteflt_reset(struct quoteflt *self, FILE *f);
 392 FL ssize_t     quoteflt_push(struct quoteflt *self,
 393                   char const *dat, size_t len);
 394 FL ssize_t     quoteflt_flush(struct quoteflt *self);
 395
 396 /* fio.c */
 397
 398 /* fgets() replacement to handle lines of arbitrary size and with embedded \0
 399  * characters.
 400  * *line* - line buffer. *line be NULL.
 401  * *linesize* - allocated size of line buffer.
 402  * *count* - maximum characters to read. May be NULL.
 403  * *llen* - length_of_line(*line).
 404  * *fp* - input FILE.
 405  * *appendnl* - always terminate line with \n, append if necessary.
 406  */
 407 FL char *      fgetline(char **line, size_t *linesize, size_t *count,
 408                   size_t *llen, FILE *fp, int appendnl SMALLOC_DEBUG_ARGS);
 409 #ifdef HAVE_DEBUG
 410 # define fgetline(A,B,C,D,E,F)   \
 411    fgetline(A, B, C, D, E, F, __FILE__, __LINE__)
 412 #endif
 413
 414 /* Read up a line from the specified input into the linebuffer.
 415  * Return the number of characters read.  Do not include the newline at EOL.
 416  * *n* is the number of characters already read.
 417  */
 418 FL int         readline_restart(FILE *ibuf, char **linebuf, size_t *linesize,
 419                   size_t n SMALLOC_DEBUG_ARGS);
 420 #ifdef HAVE_DEBUG
 421 # define readline_restart(A,B,C,D) \
 422    readline_restart(A, B, C, D, __FILE__, __LINE__)
 423 #endif
 424
 425 /* Read a complete line of input (with editing if possible).
 426  * If *prompt* is NULL we'll call getprompt() first.
 427  * Return number of octets or a value <0 on error */
 428 FL int         readline_input(enum lned_mode lned, char const *prompt,
 429                   char **linebuf, size_t *linesize SMALLOC_DEBUG_ARGS);
 430 #ifdef HAVE_DEBUG
 431 # define readline_input(A,B,C,D) readline_input(A, B, C, D, __FILE__, __LINE__)
 432 #endif
 433
 434 /* Read a line of input (with editing if possible) and return it savestr()d,
 435  * or NULL in case of errors or if an empty line would be returned.
 436  * This may only be called from toplevel (not during sourcing).
 437  * If *prompt* is NULL we'll call getprompt().
 438  * *string* is the default/initial content of the return value (this is
 439  * "almost" ignored in non-interactive mode for reproducability) */
 440 FL char *      readstr_input(char const *prompt, char const *string);
 441
 442 FL void        setptr(FILE *ibuf, off_t offset);
 443 FL int         putline(FILE *obuf, char *linebuf, size_t count);
 444 FL FILE *      setinput(struct mailbox *mp, struct message *m,
 445                   enum needspec need);
 446 FL struct message * setdot(struct message *mp);
 447 FL int         rm(char *name);
 448 FL off_t       fsize(FILE *iob);
 449
 450 /* Evaluate the string given as a new mailbox name. Supported meta characters:
 451  * %  for my system mail box
 452  * %user for user's system mail box
 453  * #  for previous file
 454  * &  invoker's mbox file
 455  * +file file in folder directory
 456  * any shell meta character
 457  * Returns the file name as an auto-reclaimed string */
 458 FL char *      fexpand(char const *name, enum fexp_mode fexpm);
 459
 460 #define expand(N)                fexpand(N, FEXP_FULL)   /* XXX obsolete */
 461 #define file_expand(N)           fexpand(N, FEXP_LOCAL)  /* XXX obsolete */
 462
 463 /* Get rid of queued mail */
 464 FL void        demail(void);
 465
 466 /* vars.c hook: *folder* variable has been updated; if *folder* shouldn't be
 467  * replaced by something else, leave *store* alone, otherwise smalloc() the
 468  * desired value (ownership will be taken) */
 469 FL bool_t      var_folder_updated(char const *folder, char **store);
 470
 471 /* Determine the current *folder* name, store it in *name* */
 472 FL bool_t      getfold(char *name, size_t size);
 473
 474 FL char const * getdeadletter(void);
 475
 476 FL enum okay   get_body(struct message *mp);
 477
 478 #ifdef HAVE_SOCKETS
 479 FL int         sclose(struct sock *sp);
 480 FL enum okay   swrite(struct sock *sp, const char *data);
 481 FL enum okay   swrite1(struct sock *sp, const char *data, int sz,
 482                   int use_buffer);
 483 FL enum okay   sopen(const char *xserver, struct sock *sp, int use_ssl,
 484                   const char *uhp, const char *portstr, int verbose);
 485
 486 /*  */
 487 FL int         sgetline(char **line, size_t *linesize, size_t *linelen,
 488                   struct sock *sp SMALLOC_DEBUG_ARGS);
 489 # ifdef HAVE_DEBUG
 490 #  define sgetline(A,B,C,D)      sgetline(A, B, C, D, __FILE__, __LINE__)
 491 # endif
 492 #endif
 493
 494 /* Deal with loading of resource files and dealing with a stack of files for
 495  * the source command */
 496
 497 /* Load a file of user definitions */
 498 FL void        load(char const *name);
 499
 500 /* Pushdown current input file and switch to a new one.  Set the global flag
 501  * *sourcing* so that others will realize that they are no longer reading from
 502  * a tty (in all probability) */
 503 FL int         csource(void *v);
 504
 505 /* Pop the current input back to the previous level.  Update the *sourcing*
 506  * flag as appropriate */
 507 FL int         unstack(void);
 508
 509 /* head.c */
 510
 511 /* Fill in / reedit the desired header fields */
 512 FL int         grab_headers(struct header *hp, enum gfield gflags,
 513                   int subjfirst);
 514
 515 /* Return the user's From: address(es) */
 516 FL char const * myaddrs(struct header *hp);
 517 /* Boil the user's From: addresses down to a single one, or use *sender* */
 518 FL char const * myorigin(struct header *hp);
 519
 520 /* See if the passed line buffer, which may include trailing newline (sequence)
 521  * is a mail From_ header line according to RFC 4155 */
 522 FL int         is_head(char const *linebuf, size_t linelen);
 523
 524 /* Savage extract date field from From_ line.  *linelen* is convenience as line
 525  * must be terminated (but it may end in a newline [sequence]).
 526  * Return wether the From_ line was parsed successfully */
 527 FL int         extract_date_from_from_(char const *line, size_t linelen,
 528                   char datebuf[FROM_DATEBUF]);
 529
 530 FL void        extract_header(FILE *fp, struct header *hp);
 531 #define hfieldX(a, b)            hfield_mult(a, b, 1)
 532 #define hfield1(a, b)            hfield_mult(a, b, 0)
 533 FL char *      hfield_mult(char const *field, struct message *mp, int mult);
 534 FL char const * thisfield(char const *linebuf, char const *field);
 535 FL char *      nameof(struct message *mp, int reptype);
 536 FL char const * skip_comment(char const *cp);
 537 FL char const * routeaddr(char const *name);
 538 FL int         is_addr_invalid(struct name *np, int putmsg);
 539
 540 /* Does *NP* point to a file or pipe addressee? */
 541 #define is_fileorpipe_addr(NP)   \
 542    (((NP)->n_flags & NAME_ADDRSPEC_ISFILEORPIPE) != 0)
 543
 544 /* Return skinned version of *NP*s name */
 545 #define skinned_name(NP)         \
 546    (assert((NP)->n_flags & NAME_SKINNED), \
 547    ((struct name const*)NP)->n_name)
 548
 549 /* Skin an address according to the RFC 822 interpretation of "host-phrase" */
 550 FL char *      skin(char const *name);
 551
 552 /* Skin *name* and extract the *addr-spec* according to RFC 5322.
 553  * Store the result in .ag_skinned and also fill in those .ag_ fields that have
 554  * actually been seen.
 555  * Return 0 if something good has been parsed, 1 if fun didn't exactly know how
 556  * to deal with the input, or if that was plain invalid */
 557 FL int         addrspec_with_guts(int doskin, char const *name,
 558                   struct addrguts *agp);
 559
 560 FL char *      realname(char const *name);
 561 FL char *      name1(struct message *mp, int reptype);
 562 FL int         msgidcmp(const char *s1, const char *s2);
 563 FL int         is_ign(char const *field, size_t fieldlen,
 564                   struct ignoretab ignore[2]);
 565 FL int         member(char const *realfield, struct ignoretab *table);
 566 FL char const * fakefrom(struct message *mp);
 567 FL char const * fakedate(time_t t);
 568 FL time_t      unixtime(char const *from);
 569 FL time_t      rfctime(char const *date);
 570 FL time_t      combinetime(int year, int month, int day,
 571                   int hour, int minute, int second);
 572 FL void        substdate(struct message *m);
 573 FL int         check_from_and_sender(struct name *fromfield,
 574                   struct name *senderfield);
 575 FL char *      getsender(struct message *m);
 576
 577 /* imap.c */
 578 #ifdef HAVE_IMAP
 579 FL char const * imap_fileof(char const *xcp);
 580 FL enum okay   imap_noop(void);
 581 FL enum okay   imap_select(struct mailbox *mp, off_t *size, int *count,
 582                   const char *mbx);
 583 FL int         imap_setfile(const char *xserver, int newmail, int isedit);
 584 FL enum okay   imap_header(struct message *m);
 585 FL enum okay   imap_body(struct message *m);
 586 FL void        imap_getheaders(int bot, int top);
 587 FL void        imap_quit(void);
 588 FL enum okay   imap_undelete(struct message *m, int n);
 589 FL enum okay   imap_unread(struct message *m, int n);
 590 FL int         imap_imap(void *vp);
 591 FL int         imap_newmail(int autoinc);
 592 FL enum okay   imap_append(const char *xserver, FILE *fp);
 593 FL void        imap_folders(const char *name, int strip);
 594 FL enum okay   imap_copy(struct message *m, int n, const char *name);
 595 FL enum okay   imap_search1(const char *spec, int f);
 596 FL int         imap_thisaccount(const char *cp);
 597 FL enum okay   imap_remove(const char *name);
 598 FL enum okay   imap_rename(const char *old, const char *new);
 599 FL enum okay   imap_dequeue(struct mailbox *mp, FILE *fp);
 600 FL int         cconnect(void *vp);
 601 FL int         cdisconnect(void *vp);
 602 FL int         ccache(void *vp);
 603 FL int         disconnected(const char *file);
 604 FL void        transflags(struct message *omessage, long omsgCount,
 605                   int transparent);
 606 FL time_t      imap_read_date_time(const char *cp);
 607 FL const char * imap_make_date_time(time_t t);
 608 #else
 609 # define imap_imap               ccmdnotsupp
 610 # define cconnect                ccmdnotsupp
 611 # define cdisconnect             ccmdnotsupp
 612 # define ccache                  ccmdnotsupp
 613 #endif
 614
 615 FL time_t      imap_read_date(const char *cp);
 616 FL char *      imap_quotestr(const char *s);
 617 FL char *      imap_unquotestr(const char *s);
 618
 619 /* imap_search.c */
 620 FL enum okay   imap_search(const char *spec, int f);
 621
 622 /* lex.c */
 623 FL int         setfile(char const *name, int newmail);
 624 FL int         newmailinfo(int omsgCount);
 625 FL void        commands(void);
 626 FL int         execute(char *linebuf, int contxt, size_t linesize);
 627 FL void        setmsize(int sz);
 628 FL void        onintr(int s);
 629 FL void        announce(int printheaders);
 630 FL int         newfileinfo(void);
 631 FL int         getmdot(int newmail);
 632 FL void        initbox(const char *name);
 633
 634 /* Print the docstring of `comm', which may be an abbreviation.
 635  * Return FAL0 if there is no such command */
 636 #ifdef HAVE_DOCSTRINGS
 637 FL bool_t      print_comm_docstr(char const *comm);
 638 #endif
 639
 640 /* list.c */
 641 FL int         getmsglist(char *buf, int *vector, int flags);
 642 FL int         getrawlist(const char *line, size_t linesize,
 643                   char **argv, int argc, int echolist);
 644 FL int         first(int f, int m);
 645 FL void        mark(int mesg, int f);
 646
 647 /* lzw.c */
 648 #ifdef HAVE_IMAP
 649 FL int         zwrite(void *cookie, const char *wbp, int num);
 650 FL int         zfree(void *cookie);
 651 FL int         zread(void *cookie, char *rbp, int num);
 652 FL void *      zalloc(FILE *fp);
 653 #endif /* HAVE_IMAP */
 654
 655 /* maildir.c */
 656 FL int         maildir_setfile(const char *name, int newmail, int isedit);
 657 FL void        maildir_quit(void);
 658 FL enum okay   maildir_append(const char *name, FILE *fp);
 659 FL enum okay   maildir_remove(const char *name);
 660
 661 /* mime.c */
 662
 663 /* *charset-7bit*, else CHARSET_7BIT */
 664 FL char const * charset_get_7bit(void);
 665
 666 /* *charset-8bit*, else CHARSET_8BIT */
 667 FL char const * charset_get_8bit(void);
 668
 669 /* LC_CTYPE:CODESET / *ttycharset*, else *charset-8bit*, else CHARSET_8BIT */
 670 FL char const * charset_get_lc(void);
 671
 672 /* *sendcharsets* / *charset-8bit* iterator.
 673  * *a_charset_to_try_first* may be used to prepend a charset (as for
 674  * *reply-in-same-charset*);  works correct for !HAVE_ICONV */
 675 FL void        charset_iter_reset(char const *a_charset_to_try_first);
 676 FL char const * charset_iter_next(void);
 677 FL char const * charset_iter_current(void);
 678 FL void        charset_iter_recurse(char *outer_storage[2]); /* TODO LEGACY */
 679 FL void        charset_iter_restore(char *outer_storage[2]); /* TODO LEGACY */
 680
 681 FL char const * need_hdrconv(struct header *hp, enum gfield w);
 682 FL enum mimeenc mime_getenc(char *h);
 683 FL char *      mime_getparam(char const *param, char *h);
 684
 685 /* Get the boundary out of a Content-Type: multipart/xyz header field, return
 686  * salloc()ed copy of it; store strlen() in *len if set */
 687 FL char *      mime_get_boundary(char *h, size_t *len);
 688
 689 /* Create a salloc()ed MIME boundary */
 690 FL char *      mime_create_boundary(void);
 691
 692 /* Classify content of *fp* as necessary and fill in arguments; **charset* is
 693  * left alone unless it's non-NULL */
 694 FL int         mime_classify_file(FILE *fp, char const **contenttype,
 695                   char const **charset, int *do_iconv);
 696
 697 /* */
 698 FL enum mimecontent mime_classify_content_of_part(struct mimepart const *mip);
 699
 700 /* Return the Content-Type matching the extension of name */
 701 FL char *      mime_classify_content_type_by_fileext(char const *name);
 702
 703 /* "mimetypes" command */
 704 FL int         c_mimetypes(void *v);
 705
 706 FL void        mime_fromhdr(struct str const *in, struct str *out,
 707                   enum tdflags flags);
 708 FL char *      mime_fromaddr(char const *name);
 709
 710 /* fwrite(3) performing the given MIME conversion */
 711 FL ssize_t     mime_write(char const *ptr, size_t size, FILE *f,
 712                   enum conversion convert, enum tdflags dflags,
 713                   struct quoteflt *qf, struct str *rest);
 714 FL ssize_t     xmime_write(char const *ptr, size_t size, /* TODO LEGACY */
 715                   FILE *f, enum conversion convert, enum tdflags dflags,
 716                   struct str *rest);
 717
 718 /*
 719  * mime_cte.c
 720  * Content-Transfer-Encodings as defined in RFC 2045:
 721  * - Quoted-Printable, section 6.7
 722  * - Base64, section 6.8
 723  */
 724
 725 /* How many characters of (the complete body) *ln* need to be quoted */
 726 FL size_t      mime_cte_mustquote(char const *ln, size_t lnlen, bool_t ishead);
 727
 728 /* How much space is necessary to encode *len* bytes in QP, worst case.
 729  * Includes room for terminator */
 730 FL size_t      qp_encode_calc_size(size_t len);
 731
 732 /* If *flags* includes QP_ISHEAD these assume "word" input and use special
 733  * quoting rules in addition; soft line breaks are not generated.
 734  * Otherwise complete input lines are assumed and soft line breaks are
 735  * generated as necessary */
 736 FL struct str * qp_encode(struct str *out, struct str const *in,
 737                   enum qpflags flags);
 738 #ifdef notyet
 739 FL struct str * qp_encode_cp(struct str *out, char const *cp,
 740                   enum qpflags flags);
 741 FL struct str * qp_encode_buf(struct str *out, void const *vp, size_t vp_len,
 742                   enum qpflags flags);
 743 #endif
 744
 745 /* If *rest* is set then decoding will assume body text input (assumes input
 746  * represents lines, only create output when input didn't end with soft line
 747  * break [except it finalizes an encoded CRLF pair]), otherwise it is assumed
 748  * to decode a header strings and (1) uses special decoding rules and (b)
 749  * directly produces output.
 750  * The buffers of *out* and possibly *rest* will be managed via srealloc().
 751  * Returns OKAY. XXX or STOP on error (in which case *out* is set to an error
 752  * XXX message); caller is responsible to free buffers */
 753 FL int         qp_decode(struct str *out, struct str const *in,
 754                   struct str *rest);
 755
 756 /* How much space is necessary to encode *len* bytes in Base64, worst case.
 757  * Includes room for terminator */
 758 FL size_t      b64_encode_calc_size(size_t len);
 759
 760 /* Note these simply convert all the input (if possible), including the
 761  * insertion of NL sequences if B64_CRLF or B64_LF is set (and multiple thereof
 762  * if B64_MULTILINE is set).
 763  * Thus, in the B64_BUF case, better call b64_encode_calc_size() first */
 764 FL struct str * b64_encode(struct str *out, struct str const *in,
 765                   enum b64flags flags);
 766 FL struct str * b64_encode_cp(struct str *out, char const *cp,
 767                   enum b64flags flags);
 768 FL struct str * b64_encode_buf(struct str *out, void const *vp, size_t vp_len,
 769                   enum b64flags flags);
 770
 771 /* If *rest* is set then decoding will assume text input.
 772  * The buffers of *out* and possibly *rest* will be managed via srealloc().
 773  * Returns OKAY or STOP on error (in which case *out* is set to an error
 774  * message); caller is responsible to free buffers */
 775 FL int         b64_decode(struct str *out, struct str const *in,
 776                   struct str *rest);
 777
 778 /*
 779  * names.c
 780  */
 781
 782 FL struct name * nalloc(char *str, enum gfield ntype);
 783 FL struct name * ndup(struct name *np, enum gfield ntype);
 784 FL struct name * cat(struct name *n1, struct name *n2);
 785 FL int         count(struct name const *np);
 786
 787 FL struct name * extract(char const *line, enum gfield ntype);
 788 FL struct name * lextract(char const *line, enum gfield ntype);
 789 FL char *      detract(struct name *np, enum gfield ntype);
 790
 791 /* Get a lextract() list via readstr_input(), reassigning to *np* */
 792 FL struct name * grab_names(const char *field, struct name *np, int comma,
 793          enum gfield gflags);
 794
 795 FL struct name * checkaddrs(struct name *np);
 796 FL struct name * usermap(struct name *names, bool_t force_metoo);
 797 FL struct name * elide(struct name *names);
 798 FL struct name * delete_alternates(struct name *np);
 799 FL int         is_myname(char const *name);
 800
 801 /* Dispatch a message to all pipe and file addresses TODO -> sendout.c */
 802 FL struct name * outof(struct name *names, FILE *fo, struct header *hp,
 803                   bool_t *senderror);
 804
 805 /* Handling of alias groups */
 806
 807 /* Locate a group name and return it */
 808 FL struct grouphead * findgroup(char *name);
 809
 810 /* Print a group out on stdout */
 811 FL void        printgroup(char *name);
 812
 813 FL void        remove_group(char const *name);
 814
 815 /* openssl.c */
 816 #ifdef HAVE_OPENSSL
 817 FL enum okay   ssl_open(const char *server, struct sock *sp, const char *uhp);
 818 FL void        ssl_gen_err(const char *fmt, ...);
 819 FL int         cverify(void *vp);
 820 FL FILE *      smime_sign(FILE *ip, struct header *);
 821 FL FILE *      smime_encrypt(FILE *ip, const char *certfile, const char *to);
 822 FL struct message * smime_decrypt(struct message *m, const char *to,
 823                      const char *cc, int signcall);
 824 FL enum okay   smime_certsave(struct message *m, int n, FILE *op);
 825 #else
 826 # define cverify                 ccmdnotsupp
 827 #endif
 828
 829 /* pop3.c */
 830 #ifdef HAVE_POP3
 831 FL enum okay   pop3_noop(void);
 832 FL int         pop3_setfile(const char *server, int newmail, int isedit);
 833 FL enum okay   pop3_header(struct message *m);
 834 FL enum okay   pop3_body(struct message *m);
 835 FL void        pop3_quit(void);
 836 #endif
 837
 838 /*
 839  * popen.c
 840  * Subprocesses, popen, but also file handling with registering
 841  */
 842
 843 FL FILE *      safe_fopen(const char *file, const char *mode, int *omode);
 844 FL FILE *      Fopen(const char *file, const char *mode);
 845 FL FILE *      Fdopen(int fd, const char *mode);
 846 FL int         Fclose(FILE *fp);
 847 FL FILE *      Zopen(const char *file, const char *mode, int *compression);
 848
 849 /* Create a temporary file in tempdir, use prefix for its name, store the
 850  * unique name in fn, and return a stdio FILE pointer with access mode.
 851  * *bits* specifies the access mode of the newly created temporary file */
 852 FL FILE *      Ftemp(char **fn, char const *prefix, char const *mode,
 853                   int bits, int register_file);
 854
 855 /* Free the resources associated with the given filename.  To be called after
 856  * unlink().  Since this function can be called after receiving a signal, the
 857  * variable must be made NULL first and then free()d, to avoid more than one
 858  * free() call in all circumstances */
 859 FL void        Ftfree(char **fn);
 860
 861 /* Create a pipe and ensure CLOEXEC bit is set in both descriptors */
 862 FL bool_t      pipe_cloexec(int fd[2]);
 863
 864 FL FILE *      Popen(const char *cmd, const char *mode, const char *shell,
 865                   int newfd1);
 866
 867 FL bool_t      Pclose(FILE *ptr, bool_t dowait);
 868
 869 FL void        close_all_files(void);
 870 FL int         run_command(char const *cmd, sigset_t *mask, int infd,
 871                   int outfd, char const *a0, char const *a1, char const *a2);
 872 FL int         start_command(const char *cmd, sigset_t *mask, int infd,
 873                   int outfd, const char *a0, const char *a1, const char *a2);
 874 FL void        prepare_child(sigset_t *nset, int infd, int outfd);
 875 FL void        sigchild(int signo);
 876 FL void        free_child(int pid);
 877
 878 /* Wait for pid, return wether we've had a normal EXIT_SUCCESS exit.
 879  * If wait_status is set, set it to the reported waitpid(2) wait status */
 880 FL bool_t      wait_child(int pid, int *wait_status);
 881
 882 /* quit.c */
 883 FL int         quitcmd(void *v);
 884 FL void        quit(void);
 885 FL int         holdbits(void);
 886 FL void        save_mbox_for_possible_quitstuff(void); /* TODO DROP IF U CAN */
 887 FL enum okay   makembox(void);
 888 FL int         savequitflags(void);
 889 FL void        restorequitflags(int);
 890
 891 /* send.c */
 892 FL int         sendmp(struct message *mp, FILE *obuf, struct ignoretab *doign,
 893                   char const *prefix, enum sendaction action, off_t *stats);
 894
 895 /* sendout.c */
 896 FL int         mail(struct name *to, struct name *cc, struct name *bcc,
 897                   char *subject, struct attachment *attach,
 898                   char *quotefile, int recipient_record);
 899 FL int         csendmail(void *v);
 900 FL int         cSendmail(void *v);
 901 FL enum        okay mail1(struct header *hp, int printheaders,
 902                   struct message *quote, char *quotefile, int recipient_record,
 903                   int doprefix);
 904 FL int         mkdate(FILE *fo, const char *field);
 905 FL int         puthead(struct header *hp, FILE *fo, enum gfield w,
 906                   enum sendaction action, enum conversion convert,
 907                   char const *contenttype, char const *charset);
 908 FL enum okay   resend_msg(struct message *mp, struct name *to, int add_resent);
 909
 910 /*
 911  * smtp.c
 912  */
 913
 914 #ifdef HAVE_SMTP
 915 FL char *      smtp_auth_var(const char *type, const char *addr);
 916 FL int         smtp_mta(char *server, struct name *to, FILE *fi,
 917                   struct header *hp, const char *user, const char *password,
 918                   const char *skinned);
 919 #endif
 920
 921 /*
 922  * spam.c
 923  */
 924
 925 #ifdef HAVE_SPAM
 926 FL int         cspam_clear(void *v);
 927 FL int         cspam_set(void *v);
 928 FL int         cspam_forget(void *v);
 929 FL int         cspam_ham(void *v);
 930 FL int         cspam_rate(void *v);
 931 FL int         cspam_spam(void *v);
 932 #else
 933 # define cspam_clear             ccmdnotsupp
 934 # define cspam_set               ccmdnotsupp
 935 # define cspam_forget            ccmdnotsupp
 936 # define cspam_ham               ccmdnotsupp
 937 # define cspam_rate              ccmdnotsupp
 938 # define cspam_spam              ccmdnotsupp
 939 #endif
 940
 941 /* ssl.c */
 942 #ifdef HAVE_SSL
 943 FL void        ssl_set_vrfy_level(const char *uhp);
 944 FL enum okay   ssl_vrfy_decide(void);
 945 FL char *      ssl_method_string(const char *uhp);
 946 FL enum okay   smime_split(FILE *ip, FILE **hp, FILE **bp, long xcount,
 947                   int keep);
 948 FL FILE *      smime_sign_assemble(FILE *hp, FILE *bp, FILE *sp);
 949 FL FILE *      smime_encrypt_assemble(FILE *hp, FILE *yp);
 950 FL struct message * smime_decrypt_assemble(struct message *m, FILE *hp,
 951                      FILE *bp);
 952 FL int         ccertsave(void *v);
 953 FL enum okay   rfc2595_hostname_match(const char *host, const char *pattern);
 954 #else
 955 # define ccertsave               ccmdnotsupp
 956 #endif
 957
 958 /*
 959  * strings.c
 960  * This bundles several different string related support facilities:
 961  * - auto-reclaimed string storage (memory goes away on command loop ticks)
 962  * - plain char* support functions which use unspecified or smalloc() memory
 963  * - struct str related support funs
 964  * - our iconv(3) wrapper
 965  */
 966
 967 /* Auto-reclaimed string storage */
 968
 969 /* Allocate size more bytes of space and return the address of the first byte
 970  * to the caller.  An even number of bytes are always allocated so that the
 971  * space will always be on a word boundary */
 972 FL void *      salloc(size_t size);
 973 FL void *      csalloc(size_t nmemb, size_t size);
 974
 975 /* Auto-reclaim string storage; if only_if_relaxed is true then only perform
 976  * the reset when a srelax_hold() is currently active */
 977 FL void        sreset(bool_t only_if_relaxed);
 978
 979 /* Make current string storage permanent: new allocs will be auto-reclaimed by
 980  * sreset().  This is called once only, from within main() */
 981 FL void        spreserve(void);
 982
 983 /* The "problem" with sreset() is that it releases all string storage except
 984  * what was present once spreserve() had been called; it therefore cannot be
 985  * called from all that code which yet exists and walks about all the messages
 986  * in order, e.g. quit(), searches, etc., because, unfortunately, these code
 987  * paths are reached with new intermediate string dope already in use.
 988  * Thus such code should take a srelax_hold(), successively call srelax() after
 989  * a single message has been handled, and finally srelax_rele() (unless it is
 990  * clear that sreset() occurs anyway) */
 991 FL void        srelax_hold(void);
 992 FL void        srelax_rele(void);
 993 FL void        srelax(void);
 994
 995 /* 'sstats' command */
 996 #ifdef HAVE_DEBUG
 997 FL int         c_sstats(void *v);
 998 #endif
 999
1000 FL char *      savestr(char const *str);
1001 FL char *      savestrbuf(char const *sbuf, size_t sbuf_len);
1002 FL char *      save2str(char const *str, char const *old);
1003 FL char *      savecat(char const *s1, char const *s2);
1004
1005 /* Create duplicate, lowercasing all characters along the way */
1006 FL char *      i_strdup(char const *src);
1007
1008 /* Extract the protocol base and return a duplicate */
1009 FL char *      protbase(char const *cp);
1010
1011 /* URL en- and decoding (RFC 1738, but not really) */
1012 FL char *      urlxenc(char const *cp);
1013 FL char *      urlxdec(char const *cp);
1014
1015 FL struct str * str_concat_csvl(struct str *self, ...);
1016 FL struct str * str_concat_cpa(struct str *self, char const *const*cpa,
1017                   char const *sep_o_null);
1018
1019 /* Plain char* support, not auto-reclaimed (unless noted) */
1020
1021 /* Hash the passed string; uses Chris Torek's hash algorithm */
1022 FL ui_it       strhash(char const *name);
1023
1024 #define hash(S)                  (strhash(S) % HSHSIZE) /* xxx COMPAT (?) */
1025
1026 /* Are any of the characters in the two strings the same? */
1027 FL int         anyof(char const *s1, char const *s2);
1028
1029 /* Treat **iolist* as a comma separated list of strings; find and return the
1030  * next entry, trimming surrounding whitespace, and point **iolist* to the next
1031  * entry or to NULL if no more entries are contained.  If *ignore_empty* is not
1032  * set empty entries are started over.  Return NULL or an entry */
1033 FL char *      strcomma(char **iolist, int ignore_empty);
1034
1035 /* Copy a string, lowercasing it as we go; *size* is buffer size of *dest*;
1036  * *dest* will always be terminated unless *size* is 0 */
1037 FL void        i_strcpy(char *dest, char const *src, size_t size);
1038
1039 /* Is *as1* a valid prefix of *as2*? */
1040 FL int         is_prefix(char const *as1, char const *as2);
1041
1042 /* Find the last AT @ before the first slash */
1043 FL char const * last_at_before_slash(char const *sp);
1044
1045 /* Get (and isolate) the last, possibly quoted part of linebuf, set *needs_list
1046  * to indicate wether getmsglist() et al need to be called to collect
1047  * additional args that remain in linebuf.  Return NULL on "error" */
1048 FL char *      laststring(char *linebuf, bool_t *needs_list, bool_t strip);
1049
1050 /* Convert a string to lowercase, in-place and with multibyte-aware */
1051 FL void        makelow(char *cp);
1052
1053 /* Is *sub* a substring of *str*, case-insensitive and multibyte-aware? */
1054 FL int         substr(const char *str, const char *sub);
1055
1056 /* Lazy vsprintf wrapper */
1057 #ifndef HAVE_SNPRINTF
1058 FL int         snprintf(char *str, size_t size, const char *format, ...);
1059 #endif
1060
1061 FL char *      sstpcpy(char *dst, const char *src);
1062 FL char *      sstrdup(char const *cp SMALLOC_DEBUG_ARGS);
1063 #ifdef notyet
1064 FL char *      sbufdup(char const *cp, size_t len SMALLOC_DEBUG_ARGS);
1065 #endif
1066 #ifdef HAVE_DEBUG
1067 # define sstrdup(CP)             sstrdup(CP, __FILE__, __LINE__)
1068 # define sbufdup(CP,L)           sbufdup(CP, L, __FILE__, __LINE__)
1069 #endif
1070
1071 FL char *      n_strlcpy(char *dst, const char *src, size_t len);
1072
1073 /* Locale-independent character class functions */
1074 FL int         asccasecmp(char const *s1, char const *s2);
1075 FL int         ascncasecmp(char const *s1, char const *s2, size_t sz);
1076 FL char const * asccasestr(char const *haystack, char const *xneedle);
1077 FL bool_t      is_asccaseprefix(char const *as1, char const *as2);
1078
1079 /* struct str related support funs */
1080
1081 /* *self->s* is srealloc()ed */
1082 FL struct str * n_str_dup(struct str *self, struct str const *t
1083                   SMALLOC_DEBUG_ARGS);
1084
1085 /* *self->s* is srealloc()ed, *self->l* incremented */
1086 FL struct str * n_str_add_buf(struct str *self, char const *buf, size_t buflen
1087                   SMALLOC_DEBUG_ARGS);
1088 #define n_str_add(S, T)          n_str_add_buf(S, (T)->s, (T)->l)
1089 #define n_str_add_cp(S, CP)      n_str_add_buf(S, CP, (CP) ? strlen(CP) : 0)
1090
1091 #ifdef HAVE_DEBUG
1092 # define n_str_dup(S,T)          n_str_dup(S, T, __FILE__, __LINE__)
1093 # define n_str_add_buf(S,B,BL)   n_str_add_buf(S, B, BL, __FILE__, __LINE__)
1094 #endif
1095
1096 /* Our iconv(3) wrappers */
1097
1098 #ifdef HAVE_ICONV
1099 FL iconv_t     n_iconv_open(char const *tocode, char const *fromcode);
1100 /* If *cd* == *iconvd*, assigns -1 to the latter */
1101 FL void        n_iconv_close(iconv_t cd);
1102
1103 /* Reset encoding state */
1104 #ifdef notyet
1105 FL void        n_iconv_reset(iconv_t cd);
1106 #endif
1107
1108 /* iconv(3), but return *errno* or 0; *skipilseq* forces step over illegal byte
1109  * sequences; likewise iconv_str(), but which auto-grows on E2BIG errors; *in*
1110  * and *in_rest_or_null* may be the same object.
1111  * Note: EINVAL (incomplete sequence at end of input) is NOT handled, so the
1112  * replacement character must be added manually if that happens at EOF! */
1113 FL int         n_iconv_buf(iconv_t cd, char const **inb, size_t *inbleft,
1114                   char **outb, size_t *outbleft, bool_t skipilseq);
1115 FL int         n_iconv_str(iconv_t icp, struct str *out, struct str const *in,
1116                   struct str *in_rest_or_null, bool_t skipilseq);
1117 #endif
1118
1119 /* thread.c */
1120 FL int         thread(void *vp);
1121 FL int         unthread(void *vp);
1122 FL struct message * next_in_thread(struct message *mp);
1123 FL struct message * prev_in_thread(struct message *mp);
1124 FL struct message * this_in_thread(struct message *mp, long n);
1125 FL int         sort(void *vp);
1126 FL int         ccollapse(void *v);
1127 FL int         cuncollapse(void *v);
1128 FL void        uncollapse1(struct message *m, int always);
1129
1130 /*
1131  * tty.c
1132  */
1133
1134 /* [Yy]es or [Nn]o */
1135 FL bool_t      yorn(char const *msg);
1136
1137 /* Get a password the expected way, return termios_state.ts_linebuf on
1138  * success or NULL on error */
1139 FL char *      getuser(char const *query);
1140
1141 /* Get a password the expected way, return termios_state.ts_linebuf on
1142  * success or NULL on error.
1143  * termios_state_reset() (def.h) must be called anyway */
1144 FL char *      getpassword(char const *query);
1145
1146 /* Get both, user and password in the expected way; simply reuses a value that
1147  * is set, otherwise calls one of the above.
1148  * Returns true only if we have a user and a password.
1149  * *user* will be savestr()ed if neither it nor *pass* have a default value
1150  * (so that termios_state.ts_linebuf carries only one) */
1151 FL bool_t      getcredentials(char **user, char **pass);
1152
1153 /* Overall interactive terminal life cycle for command line editor library */
1154 #if defined HAVE_EDITLINE || defined HAVE_READLINE
1155 # define TTY_WANTS_SIGWINCH
1156 #endif
1157 FL void        tty_init(void);
1158 FL void        tty_destroy(void);
1159
1160 /* Rather for main.c / SIGWINCH interaction only */
1161 FL void        tty_signal(int sig);
1162
1163 /* Read a line after printing prompt (if set and non-empty).
1164  * If n>0 assumes that *linebuf has n bytes of default content */
1165 FL int         tty_readline(char const *prompt, char **linebuf,
1166                   size_t *linesize, size_t n SMALLOC_DEBUG_ARGS);
1167 #ifdef HAVE_DEBUG
1168 # define tty_readline(A,B,C,D)   tty_readline(A, B, C, D, __FILE__, __LINE__)
1169 #endif
1170
1171 /* Add a line (most likely as returned by tty_readline()) to the history
1172  * (only added for real if non-empty and doesn't begin with U+0020) */
1173 FL void        tty_addhist(char const *s);
1174
1175 #ifndef HAVE_AMALGAMATION
1176 # undef FL
1177 # define FL
1178 #endif
1179
1180 /* vim:set fenc=utf-8:s-it-mode */