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muttlib

muttlib

/*
* Copyright (C) 1996-2000 Michael R. Elkins
* Copyright (C) 1999-2000 Thomas Roessler
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*/

#include "mutt.h"
#include "mutt_curses.h"
#include "mime.h"
#include "mailbox.h"
#include "mx.h"
#include "url.h"

#include "reldate.h"

#ifdef USE_IMAP
#include "imap.h"
#endif

#ifdef HAVE_PGP
#include "pgp.h"
#endif

#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include

BODY *mutt_new_body (void)
{
BODY *p = (BODY *) safe_calloc (1, sizeof (BODY));

p->disposition = DISPATTACH;
p->use_disp = 1;
return (p);
}


/* Modified by blong to accept a "suggestion" for file name. If
* that file exists, then construct one with unique name but
* keep any extension. This might fail, I guess.
* Renamed to mutt_adv_mktemp so I only have to change where it's
* called, and not all possible cases.
*/
void mutt_adv_mktemp (char *s, size_t l)
{
char buf[_POSIX_PATH_MAX];
char tmp[_POSIX_PATH_MAX];
char *period;
size_t sl;
struct stat sb;

strfcpy (buf, NONULL (Tempdir), sizeof (buf));
mutt_expand_path (buf, sizeof (buf));
if (s[0] == '\0')
{
snprintf (s, l, "%s/muttXXXXXX", buf);
mktemp (s);
}
else
{
strfcpy (tmp, s, sizeof (tmp));
mutt_sanitize_filename (tmp, 1);
snprintf (s, l, "%s/%s", buf, tmp);
if (lstat (s, &sb) == -1 && errno == ENOENT)
return;
if ((period = strrchr (tmp, '.')) != NULL)
*period = 0;
snprintf (s, l, "%s/%s.XXXXXX", buf, tmp);
mktemp (s);
if (period != NULL)
{
*period = '.';
sl = mutt_strlen(s);
strfcpy(s + sl, period, l - sl);
}
}
}

/* create a send-mode duplicate from a receive-mode body */

int mutt_copy_body (FILE *fp, BODY **tgt, BODY *src)
{
char tmp[_POSIX_PATH_MAX];
BODY *b;

PARAMETER *par, **ppar;

short use_disp;

if (src->filename)
{
use_disp = 1;
strfcpy (tmp, src->filename, sizeof (tmp));
}
else
{
use_disp = 0;
tmp[0] = '\0';
}

mutt_adv_mktemp (tmp, sizeof (tmp));
if (mutt_save_attachment (fp, src, tmp, 0, NULL) == -1)
return -1;

*tgt = mutt_new_body ();
b = *tgt;

memcpy (b, src, sizeof (BODY));
b->parts = NULL;
b->next = NULL;

b->filename = safe_strdup (tmp);
b->use_disp = use_disp;
b->unlink = 1;

if (mutt_is_text_type (b->type, b->subtype))
b->noconv = 1;

b->xtype = safe_strdup (b->xtype);
b->subtype = safe_strdup (b->subtype);
b->form_name = safe_strdup (b->form_name);
b->filename = safe_strdup (b->filename);
b->d_filename = safe_strdup (b->d_filename);
b->description = safe_strdup (b->description);

/*
* we don't seem to need the HEADER structure currently.
* XXX - this may change in the future
*/

if (b->hdr) b->hdr = NULL;

/* copy parameters */
for (par = b->parameter, ppar = &b->parameter; par; ppar = &(*ppar)->next, par = par->next)
{
*ppar = mutt_new_parameter ();
(*ppar)->attribute = safe_strdup (par->attribute);
(*ppar)->value = safe_strdup (par->value);
}

mutt_stamp_attachment (b);

return 0;
}



void mutt_free_body (BODY **p)
{
BODY *a = *p, *b;

while (a)
{
b = a;
a = a->next;

if (b->parameter)
mutt_free_parameter (&b->parameter);
if (b->unlink && b->filename)
unlink (b->filename);
safe_free ((void **) &b->filename);
safe_free ((void **) &b->content);
safe_free ((void **) &b->xtype);
safe_free ((void **) &b->subtype);
safe_free ((void **) &b->description);
safe_free ((void **) &b->form_name);

if (b->hdr)
{
/* Don't free twice (b->hdr->content = b->parts) */
b->hdr->content = NULL;
mutt_free_header(&b->hdr);
}

if (b->parts)
mutt_free_body (&b->parts);

safe_free ((void **) &b);
}

*p = 0;
}

void mutt_free_parameter (PARAMETER **p)
{
PARAMETER *t = *p;
PARAMETER *o;

while (t)
{
safe_free ((void **) &t->attribute);
safe_free ((void **) &t->value);
o = t;
t = t->next;
safe_free ((void **) &o);
}
*p = 0;
}

LIST *mutt_add_list (LIST *head, const char *data)
{
LIST *tmp;

for (tmp = head; tmp && tmp->next; tmp = tmp->next)
;
if (tmp)
{
tmp->next = safe_malloc (sizeof (LIST));
tmp = tmp->next;
}
else
head = tmp = safe_malloc (sizeof (LIST));

tmp->data = safe_strdup (data);
tmp->next = NULL;
return head;
}

void mutt_free_list (LIST **list)
{
LIST *p;

if (!list) return;
while (*list)
{
p = *list;
*list = (*list)->next;
safe_free ((void **) &p->data);
safe_free ((void **) &p);
}
}

HEADER *mutt_dup_header(HEADER *h)
{
HEADER *hnew;

hnew = mutt_new_header();
memcpy(hnew, h, sizeof (HEADER));
return hnew;
}

void mutt_free_header (HEADER **h)
{
if(!h || !*h) return;
mutt_free_envelope (&(*h)->env);
mutt_free_body (&(*h)->content);
safe_free ((void **) &(*h)->tree);
safe_free ((void **) &(*h)->path);
#ifdef MIXMASTER
mutt_free_list (&(*h)->chain);
#endif
#if defined USE_POP || defined USE_IMAP
safe_free ((void**) &(*h)->data);
#endif
safe_free ((void **) h);
}

/* returns true if the header contained in "s" is in list "t" */
int mutt_matches_ignore (const char *s, LIST *t)
{
for (; t; t = t->next)
{
if (!ascii_strncasecmp (s, t->data, mutt_strlen (t->data)) || *t->data == '*')
return 1;
}
return 0;
}

/* prepend the path part of *path to *link */
void mutt_expand_link (char *newpath, const char *path, const char *link)
{
const char *lb = NULL;
size_t len;

/* link is full path */
if (*link == '/')
{
strfcpy (newpath, link, _POSIX_PATH_MAX);
return;
}

if ((lb = strrchr (path, '/')) == NULL)
{
/* no path in link */
strfcpy (newpath, link, _POSIX_PATH_MAX);
return;
}

len = lb - path + 1;
memcpy (newpath, path, len);
strfcpy (newpath + len, link, _POSIX_PATH_MAX - len);
}

char *mutt_expand_path (char *s, size_t slen)
{
return _mutt_expand_path (s, slen, 0);
}

char *_mutt_expand_path (char *s, size_t slen, int rx)
{
char p[_POSIX_PATH_MAX] = "";
char q[_POSIX_PATH_MAX] = "";
char tmp[_POSIX_PATH_MAX];
char *t;

char *tail = "";

int recurse = 0;

do
{
recurse = 0;

switch (*s)
{
case '~':
{
if (*(s + 1) == '/' || *(s + 1) == 0)
{
strfcpy (p, NONULL(Homedir), sizeof (p));
tail = s + 1;
}
else
{
struct passwd *pw;
if ((t = strchr (s + 1, '/')))
*t = 0;

if ((pw = getpwnam (s + 1)))
{
strfcpy (p, pw->pw_dir, sizeof (p));
if (t)
{
*t = '/';
tail = t;
}
else
tail = "";
}
else
{
/* user not found! */
if (t)
*t = '/';
*p = '\0';
tail = s;
}
}
}
break;

case '=':
case '+':
{
#ifdef USE_IMAP
/* if folder = {host} or imap[s]://host/: don't append slash */
if (mx_is_imap (NONULL (Maildir)) &&
(Maildir[strlen (Maildir) - 1] == '}' ||
Maildir[strlen (Maildir) - 1] == '/'))
strfcpy (p, NONULL (Maildir), sizeof (p));
else
#endif
snprintf (p, sizeof (p), "%s/", NONULL (Maildir));

tail = s + 1;
}
break;

/* elm compatibility, @ expands alias to user name */

case '@':
{
HEADER *h;
ADDRESS *alias;

if ((alias = mutt_lookup_alias (s + 1)))
{
h = mutt_new_header();
h->env = mutt_new_envelope();
h->env->from = h->env->to = alias;
mutt_default_save (p, sizeof (p), h);
h->env->from = h->env->to = NULL;
mutt_free_header (&h);
/* Avoid infinite recursion if the resulting folder starts with '@' */
if (*p != '@')
recurse = 1;

tail = "";
}
}
break;

case '>':
{
strfcpy (p, NONULL(Inbox), sizeof (p));
tail = s + 1;
}
break;

case '<':
{
strfcpy (p, NONULL(Outbox), sizeof (p));
tail = s + 1;
}
break;

case '!':
{
if (*(s+1) == '!')
{
strfcpy (p, NONULL(LastFolder), sizeof (p));
tail = s + 2;
}
else
{
strfcpy (p, NONULL(Spoolfile), sizeof (p));
tail = s + 1;
}
}
break;

case '-':
{
strfcpy (p, NONULL(LastFolder), sizeof (p));
tail = s + 1;
}
break;

default:
{
*p = '\0';
tail = s;
}
}

if (rx && *p && !recurse)
{
mutt_rx_sanitize_string (q, sizeof (q), p);
snprintf (tmp, sizeof (tmp), "%s%s", q, tail);
}
else
snprintf (tmp, sizeof (tmp), "%s%s", p, tail);

strfcpy (s, tmp, slen);
}
while (recurse);

#ifdef USE_IMAP
/* Rewrite IMAP path in canonical form - aids in string comparisons of
* folders. May possibly fail, in which case s should be the same. */
if (mx_is_imap (s))
imap_expand_path (s, slen);
#endif

return (s);
}

/* Extract the real name from /etc/passwd's GECOS field.
* When set, honor the regular expression in GecosMask,
* otherwise assume that the GECOS field is a
* comma-separated list.
* Replace "&" by a capitalized version of the user's login
* name.
*/

char *mutt_gecos_name (char *dest, size_t destlen, struct passwd *pw)
{
regmatch_t pat_match[1];
size_t pwnl;
int idx;
char *p;

if (!pw || !pw->pw_gecos)
return NULL;

memset (dest, 0, destlen);

if (GecosMask.rx)
{
if (regexec (GecosMask.rx, pw->pw_gecos, 1, pat_match, 0) == 0)
strfcpy (dest, pw->pw_gecos + pat_match[0].rm_so,
MIN (pat_match[0].rm_eo - pat_match[0].rm_so + 1, destlen));
}
else if ((p = strchr (pw->pw_gecos, ',')))
strfcpy (dest, pw->pw_gecos, MIN (destlen, p - pw->pw_gecos + 1));
else
strfcpy (dest, pw->pw_gecos, destlen);

pwnl = strlen (pw->pw_name);

for (idx = 0; dest[idx]; idx++)
{
if (dest[idx] == '&')
{
memmove (&dest[idx + pwnl], &dest[idx + 1],
MAX(destlen - idx - pwnl - 1, 0));
memcpy (&dest[idx], pw->pw_name, MIN(destlen - idx - 1, pwnl));
dest[idx] = toupper (dest[idx]);
}
}

return dest;
}


char *mutt_get_parameter (const char *s, PARAMETER *p)
{
for (; p; p = p->next)
if (ascii_strcasecmp (s, p->attribute) == 0)
return (p->value);

return NULL;
}

void mutt_set_parameter (const char *attribute, const char *value, PARAMETER **p)
{
PARAMETER *q;

if (!value)
{
mutt_delete_parameter (attribute, p);
return;
}

for(q = *p; q; q = q->next)
{
if (ascii_strcasecmp (attribute, q->attribute) == 0)
{
mutt_str_replace (&q->value, value);
return;
}
}

q = mutt_new_parameter();
q->attribute = safe_strdup(attribute);
q->value = safe_strdup(value);
q->next = *p;
*p = q;
}

void mutt_delete_parameter (const char *attribute, PARAMETER **p)
{
PARAMETER *q;

for (q = *p; q; p = &q->next, q = q->next)
{
if (ascii_strcasecmp (attribute, q->attribute) == 0)
{
*p = q->next;
q->next = NULL;
mutt_free_parameter (&q);
return;
}
}
}

/* returns 1 if Mutt can't display this type of data, 0 otherwise */
int mutt_needs_mailcap (BODY *m)
{
switch (m->type)
{
case TYPETEXT:

if (!ascii_strcasecmp ("plain", m->subtype) ||
!ascii_strcasecmp ("rfc822-headers", m->subtype) ||
!ascii_strcasecmp ("enriched", m->subtype))
return 0;
break;



#ifdef HAVE_PGP
case TYPEAPPLICATION:
if(mutt_is_application_pgp(m))
return 0;
break;
#endif /* HAVE_PGP */


case TYPEMULTIPART:
case TYPEMESSAGE:

return 0;
}

return 1;
}

int mutt_is_text_type (int t, char *s)
{
if (t == TYPETEXT)
return 1;

if (t == TYPEMESSAGE)
{
if (!ascii_strcasecmp ("delivery-status", s))
return 1;
}



#ifdef HAVE_PGP
if (t == TYPEAPPLICATION)
{
if (!ascii_strcasecmp ("pgp-keys", s))
return 1;
}
#endif /* HAVE_PGP */



return 0;
}

void mutt_free_envelope (ENVELOPE **p)
{
if (!*p) return;
rfc822_free_address (&(*p)->return_path);
rfc822_free_address (&(*p)->to);
rfc822_free_address (&(*p)->cc);
rfc822_free_address (&(*p)->bcc);
rfc822_free_address (&(*p)->sender);
rfc822_free_address (&(*p)->from);
rfc822_free_address (&(*p)->reply_to);
rfc822_free_address (&(*p)->mail_followup_to);
safe_free ((void **) &(*p)->subject);
safe_free ((void **) &(*p)->message_id);
safe_free ((void **) &(*p)->supersedes);
safe_free ((void **) &(*p)->date);
mutt_free_list (&(*p)->references);
mutt_free_list (&(*p)->in_reply_to);
mutt_free_list (&(*p)->userhdrs);
safe_free ((void **) p);
}

void mutt_mktemp (char *s)
{
snprintf (s, _POSIX_PATH_MAX, "%s/mutt-%s-%d-%d", NONULL (Tempdir), NONULL(Hostname), (int) getpid (), Counter++);
unlink (s);
}

void mutt_free_alias (ALIAS **p)
{
ALIAS *t;

while (*p)
{
t = *p;
*p = (*p)->next;
safe_free ((void **) &t->name);
rfc822_free_address (&t->addr);
safe_free ((void **) &t);
}
}

/* collapse the pathname using ~ or = when possible */
void mutt_pretty_mailbox (char *s)
{
char *p = s, *q = s;
size_t len;
url_scheme_t scheme;

scheme = url_check_scheme (s);

#ifdef USE_IMAP
if (scheme == U_IMAP || scheme == U_IMAPS)
{
imap_pretty_mailbox (s);
return;
}
#endif

/* if s is an url, only collapse path component */
if (scheme != U_UNKNOWN)
{
p = strchr(s, ':')+1;
if (!strncmp (p, "//", 2))
q = strchr (p+2, '/');
if (!q)
q = strchr (p, '\0');
p = q;
}

/* first attempt to collapse the pathname */
while (*p)
{
if (*p == '/' && p[1] == '/')
{
*q++ = '/';
p += 2;
}
else if (p[0] == '/' && p[1] == '.' && p[2] == '/')
{
*q++ = '/';
p += 3;
}
else
*q++ = *p++;
}
*q = 0;

if (mutt_strncmp (s, Maildir, (len = mutt_strlen (Maildir))) == 0 &&
s[len] == '/')
{
*s++ = '=';
memmove (s, s + len, mutt_strlen (s + len) + 1);
}
else if (mutt_strncmp (s, Homedir, (len = mutt_strlen (Homedir))) == 0 &&
s[len] == '/')
{
*s++ = '~';
memmove (s, s + len - 1, mutt_strlen (s + len - 1) + 1);
}
}

void mutt_pretty_size (char *s, size_t len, long n)
{
if (n == 0)
strfcpy (s, "0K", len);
else if (n < 10189) /* 0.1K - 9.9K */
snprintf (s, len, "%3.1fK", (n < 103) ? 0.1 : n / 1024.0);
else if (n < 1023949) /* 10K - 999K */
{
/* 51 is magic which causes 10189/10240 to be rounded up to 10 */
snprintf (s, len, "%ldK", (n + 51) / 1024);
}
else if (n < 10433332) /* 1.0M - 9.9M */
snprintf (s, len, "%3.1fM", n / 1048576.0);
else /* 10M+ */
{
/* (10433332 + 52428) / 1048576 = 10 */
snprintf (s, len, "%ldM", (n + 52428) / 1048576);
}
}

void mutt_expand_file_fmt (char *dest, size_t destlen, const char *fmt, const char *src)
{
char tmp[LONG_STRING];

mutt_quote_filename (tmp, sizeof (tmp), src);
mutt_expand_fmt (dest, destlen, fmt, tmp);
}

void mutt_expand_fmt (char *dest, size_t destlen, const char *fmt, const char *src)
{
const char *p = fmt;
const char *last = p;
size_t len;
size_t slen;
int found = 0;

slen = mutt_strlen (src);

while ((p = strchr (p, '%')) != NULL)
{
if (p[1] == 's')
{
found++;

len = (size_t) (p - last);
if (len)
{
if (len > destlen - 1)
len = destlen - 1;

memcpy (dest, last, len);
dest += len;
destlen -= len;

if (destlen <= 0)
{
*dest = 0;
break; /* no more space */
}
}

strfcpy (dest, src, destlen);
if (slen > destlen)
{
/* no more room */
break;
}
dest += slen;
destlen -= slen;

p += 2;
last = p;
}
else if (p[1] == '%')
p++;

p++;
}

if (found)
strfcpy (dest, last, destlen);
else
snprintf (dest, destlen, "%s %s", fmt, src);

}

/* return 0 on success, -1 on error */
int mutt_check_overwrite (const char *attname, const char *path,
char *fname, size_t flen, int *append)
{
char tmp[_POSIX_PATH_MAX];
struct stat st;

strfcpy (fname, path, flen);
if (access (fname, F_OK) != 0)
return 0;
if (stat (fname, &st) != 0)
return -1;
if (S_ISDIR (st.st_mode))
{
if (mutt_yesorno (_("File is a directory, save under it?"), 1) != M_YES)
return (-1);
if (!attname || !attname[0])
{
tmp[0] = 0;
if (mutt_get_field (_("File under directory: "), tmp, sizeof (tmp),
M_FILE | M_CLEAR) != 0 || !tmp[0])
return (-1);
snprintf (fname, flen, "%s/%s", path, tmp);
}
else
snprintf (fname, flen, "%s/%s", path, attname);
}

if (*append == 0 && access (fname, F_OK) == 0)
{
switch (mutt_multi_choice
(_("File exists, (o)verwrite, (a)ppend, or (c)ancel?"), _("oac")))
{
case -1: /* abort */
case 3: /* cancel */
return -1;

case 2: /* append */
*append = M_SAVE_APPEND;
break;
case 1: /* overwrite */
*append = M_SAVE_OVERWRITE;
break;
}
}
return 0;
}

void mutt_save_path (char *d, size_t dsize, ADDRESS *a)
{
if (a && a->mailbox)
{
strfcpy (d, a->mailbox, dsize);
if (!option (OPTSAVEADDRESS))
{
char *p;

if ((p = strpbrk (d, "%@")))
*p = 0;
}
mutt_strlower (d);
}
else
*d = 0;
}

void mutt_safe_path (char *s, size_t l, ADDRESS *a)
{
char *p;

mutt_save_path (s, l, a);
for (p = s; *p; p++)
if (*p == '/' || ISSPACE (*p) || !IsPrint ((unsigned char) *p))
*p = '_';
}


void mutt_FormatString (char *dest, /* output buffer */
size_t destlen, /* output buffer len */
const char *src, /* template string */
format_t *callback, /* callback for processing */
unsigned long data, /* callback data */
format_flag flags) /* callback flags */
{
char prefix[SHORT_STRING], buf[LONG_STRING], *cp, *wptr = dest, ch;
char ifstring[SHORT_STRING], elsestring[SHORT_STRING];
size_t wlen, count, len;

prefix[0] = '\0';
destlen--; /* save room for the terminal \0 */
wlen = (flags & M_FORMAT_ARROWCURSOR && option (OPTARROWCURSOR)) ? 3 : 0;

while (*src && wlen < destlen)
{
if (*src == '%')
{
if (*++src == '%')
{
*wptr++ = '%';
wlen++;
src++;
continue;
}

if (*src == '?')
{
flags |= M_FORMAT_OPTIONAL;
src++;
}
else
{
flags &= ~M_FORMAT_OPTIONAL;

/* eat the format string */
cp = prefix;
count = 0;
while (count < sizeof (prefix) &&
(isdigit ((unsigned char) *src) || *src == '.' || *src == '-'))
{
*cp++ = *src++;
count++;
}
*cp = 0;
}

if (!*src)
break; /* bad format */

ch = *src++; /* save the character to switch on */

if (flags & M_FORMAT_OPTIONAL)
{
if (*src != '?')
break; /* bad format */
src++;

/* eat the `if' part of the string */
cp = ifstring;
count = 0;
while (count < sizeof (ifstring) && *src && *src != '?' && *src != '&')
{
*cp++ = *src++;
count++;
}
*cp = 0;

/* eat the `else' part of the string (optional) */
if (*src == '&')
src++; /* skip the & */
cp = elsestring;
count = 0;
while (count < sizeof (elsestring) && *src && *src != '?')
{
*cp++ = *src++;
count++;
}
*cp = 0;

if (!*src)
break; /* bad format */

src++; /* move past the trailing `?' */
}

/* handle generic cases first */
if (ch == '>')
{
/* right justify to EOL */
ch = *src++; /* pad char */
/* calculate space left on line. if we've already written more data
than will fit on the line, ignore the rest of the line */
count = (COLS < destlen ? COLS : destlen);
if (count > wlen)
{
count -= wlen; /* how many chars left on this line */
mutt_FormatString (buf, sizeof (buf), src, callback, data, flags);
len = mutt_strlen (buf);
if (count > len)
{
count -= len; /* how many chars to pad */
memset (wptr, ch, count);
wptr += count;
wlen += count;
}
if (len + wlen > destlen)
len = destlen - wlen;
memcpy (wptr, buf, len);
wptr += len;
wlen += len;
}
break; /* skip rest of input */
}
else if (ch == '|')
{
/* pad to EOL */
ch = *src++;
if (destlen > COLS)
destlen = COLS;
if (destlen > wlen)
{
count = destlen - wlen;
memset (wptr, ch, count);
wptr += count;
}
break; /* skip rest of input */
}
else
{
short tolower = 0;

if (ch == '_')
{
ch = *src++;
tolower = 1;
}

/* use callback function to handle this case */
src = callback (buf, sizeof (buf), ch, src, prefix, ifstring, elsestring, data, flags);

if (tolower)
mutt_strlower (buf);

if ((len = mutt_strlen (buf)) + wlen > destlen)
len = (destlen - wlen > 0) ? (destlen - wlen) : 0;

memcpy (wptr, buf, len);
wptr += len;
wlen += len;
}
}
else if (*src == '\\')
{
if (!*++src)
break;
switch (*src)
{
case 'n':
*wptr = '\n';
break;
case 't':
*wptr = '\t';
break;
case 'r':
*wptr = '\r';
break;
case 'f':
*wptr = '\f';
break;
case 'v':
*wptr = '\v';
break;
default:
*wptr = *src;
break;
}
src++;
wptr++;
wlen++;
}
else
{
*wptr++ = *src++;
wlen++;
}
}
*wptr = 0;

#if 0
if (flags & M_FORMAT_MAKEPRINT)
{
/* Make sure that the string is printable by changing all non-printable
chars to dots, or spaces for non-printable whitespace */
for (cp = dest ; *cp ; cp++)
if (!IsPrint (*cp) &&
!((flags & M_FORMAT_TREE) && (*cp <= M_TREE_MAX)))
*cp = isspace ((unsigned char) *cp) ? ' ' : '.';
}
#endif
}

/* This function allows the user to specify a command to read stdout from in
place of a normal file. If the last character in the string is a pipe (|),
then we assume it is a commmand to run instead of a normal file. */
FILE *mutt_open_read (const char *path, pid_t *thepid)
{
FILE *f;
int len = mutt_strlen (path);

if (path[len - 1] == '|')
{
/* read from a pipe */

char *s = safe_strdup (path);

s[len - 1] = 0;
mutt_endwin (NULL);
*thepid = mutt_create_filter (s, NULL, &f, NULL);
safe_free ((void **) &s);
}
else
{
f = fopen (path, "r");
*thepid = -1;
}
return (f);
}

/* returns 1 if OK to proceed, 0 to abort */
int mutt_save_confirm (const char *s, struct stat *st)
{
char tmp[_POSIX_PATH_MAX];
int ret = 1;
int magic = 0;

magic = mx_get_magic (s);

#ifdef USE_POP
if (magic == M_POP)
{
mutt_error _("Can't save message to POP mailbox.");
return 0;
}
#endif

if (stat (s, st) != -1)
{
if (magic == -1)
{
mutt_error (_("%s is not a mailbox!"), s);
return 0;
}

if (option (OPTCONFIRMAPPEND))
{
snprintf (tmp, sizeof (tmp), _("Append messages to %s?"), s);
if (mutt_yesorno (tmp, 1) < 1)
ret = 0;
}
}
else
{
#ifdef USE_IMAP
if (magic != M_IMAP)
#endif /* execute the block unconditionally if we don't use imap */
{
st->st_mtime = 0;
st->st_atime = 0;

if (errno == ENOENT)
{
if (option (OPTCONFIRMCREATE))
{
snprintf (tmp, sizeof (tmp), _("Create %s?"), s);
if (mutt_yesorno (tmp, 1) < 1)
ret = 0;
}
}
else
{
mutt_perror (s);
return 0;
}
}
}

CLEARLINE (LINES-1);
return (ret);
}

void state_prefix_putc(char c, STATE *s)
{
if (s->flags & M_PENDINGPREFIX)
{
state_reset_prefix(s);
if (s->prefix)
state_puts(s->prefix, s);
}

state_putc(c, s);

if(c == '\n')
state_set_prefix(s);
}

int state_printf(STATE *s, const char *fmt, ...)
{
int rv;
va_list ap;

va_start (ap, fmt);
rv = vfprintf(s->fpout, fmt, ap);
va_end(ap);

return rv;
}

void state_mark_attach (STATE *s)
{
if ((s->flags & M_DISPLAY) && !mutt_strcmp (Pager, "builtin"))
state_puts (AttachmentMarker, s);
}

void state_attach_puts (const char *t, STATE *s)
{
state_mark_attach (s);
while (*t)
{
state_putc (*t, s);
if (*t++ == '\n' && *t)
state_mark_attach (s);
}
}

void mutt_display_sanitize (char *s)
{
for (; *s; s++)
{
if (!IsPrint (*s))
*s = '?';
}
}

void mutt_sleep (short s)
{
if (SleepTime > s)
sleep (SleepTime);
else if (s)
sleep (s);
}

void mutt_buffer_addstr (BUFFER* buf, const char* s)
{
mutt_buffer_add (buf, s, mutt_strlen (s));
}

void mutt_buffer_addch (BUFFER* buf, char c)
{
mutt_buffer_add (buf, &c, 1);
}

/* dynamically grows a BUFFER to accomodate s, in increments of 128 bytes.
* Always one byte bigger than necessary for the null terminator, and
* the buffer is always null-terminated */
void mutt_buffer_add (BUFFER* buf, const char* s, size_t len)
{
size_t offset;

if (buf->dptr + len + 1 > buf->data + buf->dsize)
{
offset = buf->dptr - buf->data;
buf->dsize += len < 128 ? 128 : len + 1;
safe_realloc ((void**) &buf->data, buf->dsize);
buf->dptr = buf->data + offset;
}
memcpy (buf->dptr, s, len);
buf->dptr += len;
*(buf->dptr) = '\0';
}

/* Decrease a file's modification time by 1 second */

time_t mutt_decrease_mtime (const char *f, struct stat *st)
{
struct utimbuf utim;
struct stat _st;
time_t mtime;

if (!st)
{
if (stat (f, &_st) == -1)
return -1;
st = &_st;
}

if ((mtime = st->st_mtime) == time (NULL))
{
mtime -= 1;
utim.actime = mtime;
utim.modtime = mtime;
utime (f, &utim);
}

return mtime;
}

const char *mutt_make_version (void)
{
static char vstring[STRING];
snprintf (vstring, sizeof (vstring), "Mutt %s (%s)",
MUTT_VERSION, ReleaseDate);
return vstring;
}

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