--- /dev/null
+This is the pre-mmh version of sbr/m_getfld.c (dated 2008-12-26).
+The current version is still unbearbable, but this one is original.
+Enjoy! :-) -- 2012-04-01 markus schnalke <meillo@marmaro.de>
+
+/*
+ * m_getfld.c -- read/parse a message
+ *
+ * This code is Copyright (c) 2002, by the authors of nmh. See the
+ * COPYRIGHT file in the root directory of the nmh distribution for
+ * complete copyright information.
+ */
+
+#include <h/mh.h>
+#include <h/mts.h>
+#include <h/utils.h>
+
+/* This module has a long and checkered history. First, it didn't burst
+ maildrops correctly because it considered two CTRL-A:s in a row to be
+ an inter-message delimiter. It really is four CTRL-A:s followed by a
+ newline. Unfortunately, MMDF will convert this delimiter *inside* a
+ message to a CTRL-B followed by three CTRL-A:s and a newline. This
+ caused the old version of m_getfld() to declare eom prematurely. The
+ fix was a lot slower than
+
+ c == '\001' && peekc (iob) == '\001'
+
+ but it worked, and to increase generality, MBOX style maildrops could
+ be parsed as well. Unfortunately the speed issue finally caught up with
+ us since this routine is at the very heart of MH.
+
+ To speed things up considerably, the routine Eom() was made an auxilary
+ function called by the macro eom(). Unless we are bursting a maildrop,
+ the eom() macro returns FALSE saying we aren't at the end of the
+ message.
+
+ The next thing to do is to read the mts.conf file and initialize
+ delimiter[] and delimlen accordingly...
+
+ After mhl was made a built-in in msh, m_getfld() worked just fine
+ (using m_unknown() at startup). Until one day: a message which was
+ the result of a bursting was shown. Then, since the burst boundaries
+ aren't CTRL-A:s, m_getfld() would blinding plunge on past the boundary.
+ Very sad. The solution: introduce m_eomsbr(). This hook gets called
+ after the end of each line (since testing for eom involves an fseek()).
+ This worked fine, until one day: a message with no body portion arrived.
+ Then the
+
+ while (eom (c = Getc (iob), iob))
+ continue;
+
+ loop caused m_getfld() to return FMTERR. So, that logic was changed to
+ check for (*eom_action) and act accordingly.
+
+ This worked fine, until one day: someone didn't use four CTRL:A's as
+ their delimiters. So, the bullet got bit and we read mts.h and
+ continue to struggle on. It's not that bad though, since the only time
+ the code gets executed is when inc (or msh) calls it, and both of these
+ have already called mts_init().
+
+ ------------------------
+ (Written by Van Jacobson for the mh6 m_getfld, January, 1986):
+
+ This routine was accounting for 60% of the cpu time used by most mh
+ programs. I spent a bit of time tuning and it now accounts for <10%
+ of the time used. Like any heavily tuned routine, it's a bit
+ complex and you want to be sure you understand everything that it's
+ doing before you start hacking on it. Let me try to emphasize
+ that: every line in this atrocity depends on every other line,
+ sometimes in subtle ways. You should understand it all, in detail,
+ before trying to change any part. If you do change it, test the
+ result thoroughly (I use a hand-constructed test file that exercises
+ all the ways a header name, header body, header continuation,
+ header-body separator, body line and body eom can align themselves
+ with respect to a buffer boundary). "Minor" bugs in this routine
+ result in garbaged or lost mail.
+
+ If you hack on this and slow it down, I, my children and my
+ children's children will curse you.
+
+ This routine gets used on three different types of files: normal,
+ single msg files, "packed" unix or mmdf mailboxs (when used by inc)
+ and packed, directoried bulletin board files (when used by msh).
+ The biggest impact of different file types is in "eom" testing. The
+ code has been carefully organized to test for eom at appropriate
+ times and at no other times (since the check is quite expensive).
+ I have tried to arrange things so that the eom check need only be
+ done on entry to this routine. Since an eom can only occur after a
+ newline, this is easy to manage for header fields. For the msg
+ body, we try to efficiently search the input buffer to see if
+ contains the eom delimiter. If it does, we take up to the
+ delimiter, otherwise we take everything in the buffer. (The change
+ to the body eom/copy processing produced the most noticeable
+ performance difference, particularly for "inc" and "show".)
+
+ There are three qualitatively different things this routine busts
+ out of a message: field names, field text and msg bodies. Field
+ names are typically short (~8 char) and the loop that extracts them
+ might terminate on a colon, newline or max width. I considered
+ using a Vax "scanc" to locate the end of the field followed by a
+ "bcopy" but the routine call overhead on a Vax is too large for this
+ to work on short names. If Berkeley ever makes "inline" part of the
+ C optimiser (so things like "scanc" turn into inline instructions) a
+ change here would be worthwhile.
+
+ Field text is typically 60 - 100 characters so there's (barely)
+ a win in doing a routine call to something that does a "locc"
+ followed by a "bmove". About 30% of the fields have continuations
+ (usually the 822 "received:" lines) and each continuation generates
+ another routine call. "Inline" would be a big win here, as well.
+
+ Messages, as of this writing, seem to come in two flavors: small
+ (~1K) and long (>2K). Most messages have 400 - 600 bytes of headers
+ so message bodies average at least a few hundred characters.
+ Assuming your system uses reasonably sized stdio buffers (1K or
+ more), this routine should be able to remove the body in large
+ (>500 byte) chunks. The makes the cost of a call to "bcopy"
+ small but there is a premium on checking for the eom in packed
+ maildrops. The eom pattern is always a simple string so we can
+ construct an efficient pattern matcher for it (e.g., a Vax "matchc"
+ instruction). Some thought went into recognizing the start of
+ an eom that has been split across two buffers.
+
+ This routine wants to deal with large chunks of data so, rather
+ than "getc" into a local buffer, it uses stdio's buffer. If
+ you try to use it on a non-buffered file, you'll get what you
+ deserve. This routine "knows" that struct FILEs have a _ptr
+ and a _cnt to describe the current state of the buffer and
+ it knows that _filbuf ignores the _ptr & _cnt and simply fills
+ the buffer. If stdio on your system doesn't work this way, you
+ may have to make small changes in this routine.
+
+ This routine also "knows" that an EOF indication on a stream is
+ "sticky" (i.e., you will keep getting EOF until you reposition the
+ stream). If your system doesn't work this way it is broken and you
+ should complain to the vendor. As a consequence of the sticky
+ EOF, this routine will never return any kind of EOF status when
+ there is data in "name" or "buf").
+ */
+
+
+/*
+ * static prototypes
+ */
+static int m_Eom (int, FILE *);
+static unsigned char *matchc(int, char *, int, char *);
+static unsigned char *locc(int, unsigned char *, unsigned char);
+
+#define Getc(iob) getc(iob)
+#define eom(c,iob) (msg_style != MS_DEFAULT && \
+ (((c) == *msg_delim && m_Eom(c,iob)) ||\
+ (eom_action && (*eom_action)(c))))
+
+static unsigned char **pat_map;
+
+/*
+ * defined in sbr/m_msgdef.c = 0
+ * This is a disgusting hack for "inc" so it can know how many
+ * characters were stuffed in the buffer on the last call
+ * (see comments in uip/scansbr.c).
+ */
+extern int msg_count;
+
+/*
+ * defined in sbr/m_msgdef.c = MS_DEFAULT
+ */
+extern int msg_style;
+
+/*
+ * The "full" delimiter string for a packed maildrop consists
+ * of a newline followed by the actual delimiter. E.g., the
+ * full string for a Unix maildrop would be: "\n\nFrom ".
+ * "Fdelim" points to the start of the full string and is used
+ * in the BODY case of the main routine to search the buffer for
+ * a possible eom. Msg_delim points to the first character of
+ * the actual delim. string (i.e., fdelim+1). Edelim
+ * points to the 2nd character of actual delimiter string. It
+ * is used in m_Eom because the first character of the string
+ * has been read and matched before m_Eom is called.
+ */
+extern char *msg_delim; /* defined in sbr/m_msgdef.c = "" */
+static unsigned char *fdelim;
+static unsigned char *delimend;
+static int fdelimlen;
+static unsigned char *edelim;
+static int edelimlen;
+
+static int (*eom_action)(int) = NULL;
+
+#ifdef _FSTDIO
+# define _ptr _p /* Gag */
+# define _cnt _r /* Retch */
+# define _filbuf __srget /* Puke */
+# define DEFINED__FILBUF_TO_SOMETHING_SPECIFIC
+#endif
+
+#ifdef SCO_5_STDIO
+# define _ptr __ptr
+# define _cnt __cnt
+# define _base __base
+# define _filbuf(fp) ((fp)->__cnt = 0, __filbuf(fp))
+# define DEFINED__FILBUF_TO_SOMETHING_SPECIFIC
+#endif
+
+#ifndef DEFINED__FILBUF_TO_SOMETHING_SPECIFIC
+extern int _filbuf(FILE*);
+#endif
+
+
+int
+m_getfld (int state, unsigned char *name, unsigned char *buf,
+ int bufsz, FILE *iob)
+{
+ register unsigned char *bp, *cp, *ep, *sp;
+ register int cnt, c, i, j;
+
+ if ((c = Getc(iob)) < 0) {
+ msg_count = 0;
+ *buf = 0;
+ return FILEEOF;
+ }
+ if (eom (c, iob)) {
+ if (! eom_action) {
+ /* flush null messages */
+ while ((c = Getc(iob)) >= 0 && eom (c, iob))
+ ;
+ if (c >= 0)
+ ungetc(c, iob);
+ }
+ msg_count = 0;
+ *buf = 0;
+ return FILEEOF;
+ }
+
+ switch (state) {
+ case FLDEOF:
+ case BODYEOF:
+ case FLD:
+ if (c == '\n' || c == '-') {
+ /* we hit the header/body separator */
+ while (c != '\n' && (c = Getc(iob)) >= 0)
+ ;
+
+ if (c < 0 || (c = Getc(iob)) < 0 || eom (c, iob)) {
+ if (! eom_action) {
+ /* flush null messages */
+ while ((c = Getc(iob)) >= 0 && eom (c, iob))
+ ;
+ if (c >= 0)
+ ungetc(c, iob);
+ }
+ msg_count = 0;
+ *buf = 0;
+ return FILEEOF;
+ }
+ state = BODY;
+ goto body;
+ }
+ /*
+ * get the name of this component. take characters up
+ * to a ':', a newline or NAMESZ-1 characters, whichever
+ * comes first.
+ */
+ cp = name;
+ i = NAMESZ - 1;
+ for (;;) {
+#ifdef LINUX_STDIO
+ bp = sp = (unsigned char *) iob->_IO_read_ptr - 1;
+ j = (cnt = ((long) iob->_IO_read_end -
+ (long) iob->_IO_read_ptr) + 1) < i ? cnt : i;
+#elif defined(__DragonFly__)
+ bp = sp = (unsigned char *) ((struct __FILE_public *)iob)->_p - 1;
+ j = (cnt = ((struct __FILE_public *)iob)->_r+1) < i ? cnt : i;
+#else
+ bp = sp = (unsigned char *) iob->_ptr - 1;
+ j = (cnt = iob->_cnt+1) < i ? cnt : i;
+#endif
+ while (--j >= 0 && (c = *bp++) != ':' && c != '\n')
+ *cp++ = c;
+
+ j = bp - sp;
+ if ((cnt -= j) <= 0) {
+#ifdef LINUX_STDIO
+ iob->_IO_read_ptr = iob->_IO_read_end;
+ if (__underflow(iob) == EOF) {
+#elif defined(__DragonFly__)
+ if (__srget(iob) == EOF) {
+#else
+ if (_filbuf(iob) == EOF) {
+#endif
+ *cp = *buf = 0;
+ advise (NULL, "eof encountered in field \"%s\"", name);
+ return FMTERR;
+ }
+#ifdef LINUX_STDIO
+ iob->_IO_read_ptr++; /* NOT automatic in __underflow()! */
+#endif
+ } else {
+#ifdef LINUX_STDIO
+ iob->_IO_read_ptr = bp + 1;
+#elif defined(__DragonFly__)
+ ((struct __FILE_public *)iob)->_p = bp + 1;
+ ((struct __FILE_public *)iob)->_r = cnt - 1;
+#else
+ iob->_ptr = bp + 1;
+ iob->_cnt = cnt - 1;
+#endif
+ }
+ if (c == ':')
+ break;
+
+ /*
+ * something went wrong. possibilities are:
+ * . hit a newline (error)
+ * . got more than namesz chars. (error)
+ * . hit the end of the buffer. (loop)
+ */
+ if (c == '\n') {
+ /* We hit the end of the line without seeing ':' to
+ * terminate the field name. This is usually (always?)
+ * spam. But, blowing up is lame, especially when
+ * scan(1)ing a folder with such messages. Pretend such
+ * lines are the first of the body (at least mutt also
+ * handles it this way). */
+
+ /* See if buf can hold this line, since we were assuming
+ * we had a buffer of NAMESZ, not bufsz. */
+ /* + 1 for the newline */
+ if (bufsz < j + 1) {
+ /* No, it can't. Oh well, guess we'll blow up. */
+ *cp = *buf = 0;
+ advise (NULL, "eol encountered in field \"%s\"", name);
+ state = FMTERR;
+ goto finish;
+ }
+ memcpy (buf, name, j - 1);
+ buf[j - 1] = '\n';
+ buf[j] = '\0';
+ /* mhparse.c:get_content wants to find the position of the
+ * body start, but it thinks there's a blank line between
+ * the header and the body (naturally!), so seek back so
+ * that things line up even though we don't have that
+ * blank line in this case. Simpler parsers (e.g. mhl)
+ * get extra newlines, but that should be harmless enough,
+ * right? This is a corrupt message anyway. */
+ fseek (iob, ftell (iob) - 2, SEEK_SET);
+ return BODY;
+ }
+ if ((i -= j) <= 0) {
+ *cp = *buf = 0;
+ advise (NULL, "field name \"%s\" exceeds %d bytes", name, NAMESZ - 2);
+ state = LENERR;
+ goto finish;
+ }
+ }
+
+ while (isspace (*--cp) && cp >= name)
+ ;
+ *++cp = 0;
+ /* fall through */
+
+ case FLDPLUS:
+ /*
+ * get (more of) the text of a field. take
+ * characters up to the end of this field (newline
+ * followed by non-blank) or bufsz-1 characters.
+ */
+ cp = buf; i = bufsz-1;
+ for (;;) {
+#ifdef LINUX_STDIO
+ cnt = (long) iob->_IO_read_end - (long) iob->_IO_read_ptr;
+ bp = (unsigned char *) --iob->_IO_read_ptr;
+#elif defined(__DragonFly__)
+ cnt = ((struct __FILE_public *)iob)->_r++;
+ bp = (unsigned char *) --((struct __FILE_public *)iob)->_p;
+#else
+ cnt = iob->_cnt++;
+ bp = (unsigned char *) --iob->_ptr;
+#endif
+ c = cnt < i ? cnt : i;
+ while ((ep = locc( c, bp, '\n' ))) {
+ /*
+ * if we hit the end of this field, return.
+ */
+ if ((j = *++ep) != ' ' && j != '\t') {
+#ifdef LINUX_STDIO
+ j = ep - (unsigned char *) iob->_IO_read_ptr;
+ memcpy (cp, iob->_IO_read_ptr, j);
+ iob->_IO_read_ptr = ep;
+#elif defined(__DragonFly__)
+ j = ep - (unsigned char *) ((struct __FILE_public *)iob)->_p;
+ memcpy (cp, ((struct __FILE_public *)iob)->_p, j);
+ ((struct __FILE_public *)iob)->_p = ep;
+ ((struct __FILE_public *)iob)->_r -= j;
+#else
+ j = ep - (unsigned char *) iob->_ptr;
+ memcpy (cp, iob->_ptr, j);
+ iob->_ptr = ep;
+ iob->_cnt -= j;
+#endif
+ cp += j;
+ state = FLD;
+ goto finish;
+ }
+ c -= ep - bp;
+ bp = ep;
+ }
+ /*
+ * end of input or dest buffer - copy what we've found.
+ */
+#ifdef LINUX_STDIO
+ c += bp - (unsigned char *) iob->_IO_read_ptr;
+ memcpy( cp, iob->_IO_read_ptr, c);
+#elif defined(__DragonFly__)
+ c += bp - (unsigned char *) ((struct __FILE_public *)iob)->_p;
+ memcpy( cp, ((struct __FILE_public *)iob)->_p, c);
+#else
+ c += bp - (unsigned char *) iob->_ptr;
+ memcpy( cp, iob->_ptr, c);
+#endif
+ i -= c;
+ cp += c;
+ if (i <= 0) {
+ /* the dest buffer is full */
+#ifdef LINUX_STDIO
+ iob->_IO_read_ptr += c;
+#elif defined(__DragonFly__)
+ ((struct __FILE_public *)iob)->_r -= c;
+ ((struct __FILE_public *)iob)->_p += c;
+#else
+ iob->_cnt -= c;
+ iob->_ptr += c;
+#endif
+ state = FLDPLUS;
+ break;
+ }
+ /*
+ * There's one character left in the input buffer.
+ * Copy it & fill the buffer. If the last char
+ * was a newline and the next char is not whitespace,
+ * this is the end of the field. Otherwise loop.
+ */
+ --i;
+#ifdef LINUX_STDIO
+ *cp++ = j = *(iob->_IO_read_ptr + c);
+ iob->_IO_read_ptr = iob->_IO_read_end;
+ c = __underflow(iob);
+ iob->_IO_read_ptr++; /* NOT automatic! */
+#elif defined(__DragonFly__)
+ *cp++ =j = *(((struct __FILE_public *)iob)->_p + c);
+ c = __srget(iob);
+#else
+ *cp++ = j = *(iob->_ptr + c);
+ c = _filbuf(iob);
+#endif
+ if (c == EOF ||
+ ((j == '\0' || j == '\n') && c != ' ' && c != '\t')) {
+ if (c != EOF) {
+#ifdef LINUX_STDIO
+ --iob->_IO_read_ptr;
+#elif defined(__DragonFly__)
+ --((struct __FILE_public *)iob)->_p;
+ ++((struct __FILE_public *)iob)->_r;
+#else
+ --iob->_ptr;
+ ++iob->_cnt;
+#endif
+ }
+ state = FLD;
+ break;
+ }
+ }
+ break;
+
+ case BODY:
+ body:
+ /*
+ * get the message body up to bufsz characters or the
+ * end of the message. Sleazy hack: if bufsz is negative
+ * we assume that we were called to copy directly into
+ * the output buffer and we don't add an eos.
+ */
+ i = (bufsz < 0) ? -bufsz : bufsz-1;
+#ifdef LINUX_STDIO
+ bp = (unsigned char *) --iob->_IO_read_ptr;
+ cnt = (long) iob->_IO_read_end - (long) iob->_IO_read_ptr;
+#elif defined(__DragonFly__)
+ bp = (unsigned char *) --((struct __FILE_public *)iob)->_p;
+ cnt = ++((struct __FILE_public *)iob)->_r;
+#else
+ bp = (unsigned char *) --iob->_ptr;
+ cnt = ++iob->_cnt;
+#endif
+ c = (cnt < i ? cnt : i);
+ if (msg_style != MS_DEFAULT && c > 1) {
+ /*
+ * packed maildrop - only take up to the (possible)
+ * start of the next message. This "matchc" should
+ * probably be a Boyer-Moore matcher for non-vaxen,
+ * particularly since we have the alignment table
+ * all built for the end-of-buffer test (next).
+ * But our vax timings indicate that the "matchc"
+ * instruction is 50% faster than a carefully coded
+ * B.M. matcher for most strings. (So much for elegant
+ * algorithms vs. brute force.) Since I (currently)
+ * run MH on a vax, we use the matchc instruction. --vj
+ */
+ if ((ep = matchc( fdelimlen, fdelim, c, bp )))
+ c = ep - bp + 1;
+ else {
+ /*
+ * There's no delim in the buffer but there may be
+ * a partial one at the end. If so, we want to leave
+ * it so the "eom" check on the next call picks it up.
+ * Use a modified Boyer-Moore matcher to make this
+ * check relatively cheap. The first "if" figures
+ * out what position in the pattern matches the last
+ * character in the buffer. The inner "while" matches
+ * the pattern against the buffer, backwards starting
+ * at that position. Note that unless the buffer
+ * ends with one of the characters in the pattern
+ * (excluding the first and last), we do only one test.
+ */
+ ep = bp + c - 1;
+ if ((sp = pat_map[*ep])) {
+ do {
+ /* This if() is true unless (a) the buffer is too
+ * small to contain this delimiter prefix, or
+ * (b) it contains exactly enough chars for the
+ * delimiter prefix.
+ * For case (a) obviously we aren't going to match.
+ * For case (b), if the buffer really contained exactly
+ * a delim prefix, then the m_eom call at entry
+ * should have found it. Thus it's not a delim
+ * and we know we won't get a match.
+ */
+ if (((sp - fdelim) + 2) <= c) {
+ cp = sp;
+ /* Unfortunately although fdelim has a preceding NUL
+ * we can't use this as a sentinel in case the buffer
+ * contains a NUL in exactly the wrong place (this
+ * would cause us to run off the front of fdelim).
+ */
+ while (*--ep == *--cp)
+ if (cp < fdelim)
+ break;
+ if (cp < fdelim) {
+ /* we matched the entire delim prefix,
+ * so only take the buffer up to there.
+ * we know ep >= bp -- check above prevents underrun
+ */
+ c = (ep - bp) + 2;
+ break;
+ }
+ }
+ /* try matching one less char of delim string */
+ ep = bp + c - 1;
+ } while (--sp > fdelim);
+ }
+ }
+ }
+ memcpy( buf, bp, c );
+#ifdef LINUX_STDIO
+ iob->_IO_read_ptr += c;
+#elif defined(__DragonFly__)
+ ((struct __FILE_public *)iob)->_r -= c;
+ ((struct __FILE_public *)iob)->_p += c;
+#else
+ iob->_cnt -= c;
+ iob->_ptr += c;
+#endif
+ if (bufsz < 0) {
+ msg_count = c;
+ return (state);
+ }
+ cp = buf + c;
+ break;
+
+ default:
+ adios (NULL, "m_getfld() called with bogus state of %d", state);
+ }
+finish:
+ *cp = 0;
+ msg_count = cp - buf;
+ return (state);
+}
+
+
+#ifdef RPATHS
+static char unixbuf[BUFSIZ] = "";
+#endif /* RPATHS */
+
+void
+m_unknown(FILE *iob)
+{
+ register int c;
+ register long pos;
+ char text[10];
+ register char *cp;
+ register char *delimstr;
+
+/*
+ * Figure out what the message delimitter string is for this
+ * maildrop. (This used to be part of m_Eom but I didn't like
+ * the idea of an "if" statement that could only succeed on the
+ * first call to m_Eom getting executed on each call, i.e., at
+ * every newline in the message).
+ *
+ * If the first line of the maildrop is a Unix "From " line, we
+ * say the style is MBOX and eat the rest of the line. Otherwise
+ * we say the style is MMDF and look for the delimiter string
+ * specified when nmh was built (or from the mts.conf file).
+ */
+
+ msg_style = MS_UNKNOWN;
+
+ pos = ftell (iob);
+ if (fread (text, sizeof(*text), 5, iob) == 5
+ && strncmp (text, "From ", 5) == 0) {
+ msg_style = MS_MBOX;
+ delimstr = "\nFrom ";
+#ifndef RPATHS
+ while ((c = getc (iob)) != '\n' && c >= 0)
+ ;
+#else /* RPATHS */
+ cp = unixbuf;
+ while ((c = getc (iob)) != '\n' && cp - unixbuf < BUFSIZ - 1)
+ *cp++ = c;
+ *cp = 0;
+#endif /* RPATHS */
+ } else {
+ /* not a Unix style maildrop */
+ fseek (iob, pos, SEEK_SET);
+ if (mmdlm2 == NULL || *mmdlm2 == 0)
+ mmdlm2 = "\001\001\001\001\n";
+ delimstr = mmdlm2;
+ msg_style = MS_MMDF;
+ }
+ c = strlen (delimstr);
+ fdelim = (unsigned char *) mh_xmalloc((size_t) (c + 3));
+ *fdelim++ = '\0';
+ *fdelim = '\n';
+ msg_delim = (char *)fdelim+1;
+ edelim = (unsigned char *)msg_delim+1;
+ fdelimlen = c + 1;
+ edelimlen = c - 1;
+ strcpy (msg_delim, delimstr);
+ delimend = (unsigned char *)msg_delim + edelimlen;
+ if (edelimlen <= 1)
+ adios (NULL, "maildrop delimiter must be at least 2 bytes");
+ /*
+ * build a Boyer-Moore end-position map for the matcher in m_getfld.
+ * N.B. - we don't match just the first char (since it's the newline
+ * separator) or the last char (since the matchc would have found it
+ * if it was a real delim).
+ */
+ pat_map = (unsigned char **) calloc (256, sizeof(unsigned char *));
+
+ for (cp = (char *) fdelim + 1; cp < (char *) delimend; cp++ )
+ pat_map[(unsigned char)*cp] = (unsigned char *) cp;
+
+ if (msg_style == MS_MMDF) {
+ /* flush extra msg hdrs */
+ while ((c = Getc(iob)) >= 0 && eom (c, iob))
+ ;
+ if (c >= 0)
+ ungetc(c, iob);
+ }
+}
+
+
+void
+m_eomsbr (int (*action)(int))
+{
+ if ((eom_action = action)) {
+ msg_style = MS_MSH;
+ *msg_delim = 0;
+ fdelimlen = 1;
+ delimend = fdelim;
+ } else {
+ msg_style = MS_MMDF;
+ msg_delim = (char *)fdelim + 1;
+ fdelimlen = strlen((char *)fdelim);
+ delimend = (unsigned char *)(msg_delim + edelimlen);
+ }
+}
+
+
+/*
+ * test for msg delimiter string
+ */
+
+static int
+m_Eom (int c, FILE *iob)
+{
+ register long pos = 0L;
+ register int i;
+ char text[10];
+#ifdef RPATHS
+ register char *cp;
+#endif /* RPATHS */
+
+ pos = ftell (iob);
+ if ((i = fread (text, sizeof *text, edelimlen, iob)) != edelimlen
+ || strncmp (text, (char *)edelim, edelimlen)) {
+ if (i == 0 && msg_style == MS_MBOX)
+ /* the final newline in the (brain damaged) unix-format
+ * maildrop is part of the delimitter - delete it.
+ */
+ return 1;
+
+#if 0
+ fseek (iob, pos, SEEK_SET);
+#endif
+
+ fseek (iob, (long)(pos-1), SEEK_SET);
+ getc (iob); /* should be OK */
+ return 0;
+ }
+
+ if (msg_style == MS_MBOX) {
+#ifndef RPATHS
+ while ((c = getc (iob)) != '\n')
+ if (c < 0)
+ break;
+#else /* RPATHS */
+ cp = unixbuf;
+ while ((c = getc (iob)) != '\n' && c >= 0 && cp - unixbuf < BUFSIZ - 1)
+ *cp++ = c;
+ *cp = 0;
+#endif /* RPATHS */
+ }
+
+ return 1;
+}
+
+
+#ifdef RPATHS
+/*
+ * Return the Return-Path and Delivery-Date
+ * header information.
+ *
+ * Currently, I'm assuming that the "From " line
+ * takes one of the following forms.
+ *
+ * From sender date remote from host (for UUCP delivery)
+ * From sender@host date (for sendmail delivery)
+ */
+
+int
+get_returnpath (char *rp, int rplen, char *dd, int ddlen)
+{
+ char *ap, *bp, *cp, *dp;
+
+ ap = unixbuf;
+ if (!(bp = cp = strchr(ap, ' ')))
+ return 0;
+
+ /*
+ * Check for "remote from" in envelope to see
+ * if this message uses UUCP style addressing
+ */
+ while ((cp = strchr(++cp, 'r'))) {
+ if (strncmp (cp, "remote from", 11) == 0) {
+ cp = strrchr (cp, ' ');
+ break;
+ }
+ }
+
+ /*
+ * Get the Return-Path information from
+ * the "From " envelope.
+ */
+ if (cp) {
+ /* return path for UUCP style addressing */
+ dp = strchr (++cp, '\n');
+ snprintf (rp, rplen, "%.*s!%.*s\n", (int)(dp - cp), cp, (int)(bp - ap), ap);
+ } else {
+ /* return path for standard domain addressing */
+ snprintf (rp, rplen, "%.*s\n", (int)(bp - ap), ap);
+ }
+
+ /*
+ * advance over the spaces to get to
+ * delivery date on envelope
+ */
+ while (*bp == ' ')
+ bp++;
+
+ /* Now get delivery date from envelope */
+ snprintf (dd, ddlen, "%.*s\n", 24, bp);
+
+ unixbuf[0] = 0;
+ return 1;
+}
+#endif /* RPATHS */
+
+
+static unsigned char *
+matchc(int patln, char *pat, int strln, char *str)
+{
+ register char *es = str + strln - patln;
+ register char *sp;
+ register char *pp;
+ register char *ep = pat + patln;
+ register char pc = *pat++;
+
+ for(;;) {
+ while (pc != *str++)
+ if (str > es)
+ return 0;
+ if (str > es+1)
+ return 0;
+ sp = str; pp = pat;
+ while (pp < ep && *sp++ == *pp)
+ pp++;
+ if (pp >= ep)
+ return ((unsigned char *)--str);
+ }
+}
+
+
+/*
+ * Locate character "term" in the next "cnt" characters of "src".
+ * If found, return its address, otherwise return 0.
+ */
+
+static unsigned char *
+locc(int cnt, unsigned char *src, unsigned char term)
+{
+ while (*src++ != term && --cnt > 0);
+
+ return (cnt > 0 ? --src : (unsigned char *)0);
+}
+
projects / mmh / commitdiff