3 * scansbr.c -- routines to help scan along...
5 * This code is Copyright (c) 2002, by the authors of nmh. See the
6 * COPYRIGHT file in the root directory of the nmh distribution for
7 * complete copyright information.
11 #include <h/addrsbr.h>
12 #include <h/fmt_scan.h>
13 #include <h/scansbr.h>
18 # define _ptr _p /* Gag */
19 # define _cnt _w /* Wretch */
22 #define MAXSCANL 256 /* longest possible scan line */
25 * Buffer size for content part of header fields. We want this
26 * to be large enough so that we don't do a lot of extra FLDPLUS
27 * calls on m_getfld but small enough so that we don't snarf
28 * the entire message body when we're only going to display 30
33 static struct format *fmt;
35 static struct format *fmt_top;
38 static struct comp *datecomp; /* pntr to "date" comp */
39 static struct comp *bodycomp; /* pntr to "body" pseudo-comp *
41 static int ncomps = 0; /* # of interesting components */
42 static char **compbuffers = 0; /* buffers for component text */
43 static struct comp **used_buf = 0; /* stack for comp that use buffers */
45 static int dat[5]; /* aux. data for format routine */
47 char *scanl = 0; /* text of most recent scanline */
49 #define DIEWRERR() adios (scnmsg, "write error on")
52 if (mh_fputs(buf,scnout) == EOF)\
59 int sc_width (void); /* from termsbr.c */
60 static int mh_fputs(char *, FILE *);
62 #ifdef MULTIBYTE_SUPPORT
63 #define SCAN_CHARWIDTH MB_CUR_MAX
65 #define SCAN_CHARWIDTH 1
69 scan (FILE *inb, int innum, int outnum, char *nfs, int width, int curflg,
70 int unseen, char *folder, long size, int noisy)
72 int i, compnum, encrypted, state;
73 unsigned char *cp, *tmpbuf;
75 char *saved_c_text = NULL;
77 struct comp **savecomp;
81 static int rlwidth, slwidth;
83 /* first-time only initialization */
86 if ((width = sc_width ()) < WIDTH/2)
88 else if (width > MAXSCANL)
91 dat[3] = slwidth = width;
92 scanl = (char *) mh_xmalloc((size_t) SCAN_CHARWIDTH * (slwidth + 2) );
96 /* Compile format string */
97 ncomps = fmt_compile (nfs, &fmt) + 1;
102 FINDCOMP(bodycomp, "body");
103 FINDCOMP(datecomp, "date");
104 FINDCOMP(cptr, "folder");
106 cptr->c_text = folder;
107 FINDCOMP(cptr, "encrypted");
109 if ((cptr = (struct comp *) calloc (1, sizeof(*cptr)))) {
110 cptr->c_name = "encrypted";
111 cptr->c_next = wantcomp[i = CHASH (cptr->c_name)];
115 FINDCOMP (cptr, "dtimenow");
117 cptr->c_text = getcpy(dtimenow (0));
118 nxtbuf = compbuffers = (char **) calloc((size_t) ncomps, sizeof(char *));
120 adios (NULL, "unable to allocate component buffers");
121 used_buf = (struct comp **) calloc((size_t) (ncomps+1),
122 sizeof(struct comp *));
123 if (used_buf == NULL)
124 adios (NULL, "unable to allocate component buffer stack");
125 used_buf += ncomps+1; *--used_buf = 0;
126 rlwidth = bodycomp && (width > SBUFSIZ) ? width : SBUFSIZ;
127 for (i = ncomps; i--; )
128 *nxtbuf++ = mh_xmalloc(rlwidth);
132 * each-message initialization
134 nxtbuf = compbuffers;
137 dat[0] = innum ? innum : outnum;
142 * Get the first field. If the message is non-empty
143 * and we're doing an "inc", open the output file.
145 if ((state = m_getfld (FLD, name, tmpbuf, rlwidth, inb)) == FILEEOF) {
147 advise("read", "unable to"); /* "read error" */
156 scnmsg = m_name (outnum);
157 if (*scnmsg == '?') /* msg num out of range */
160 scnmsg = "/dev/null";
162 if ((scnout = fopen (scnmsg, "w")) == NULL)
163 adios (scnmsg, "unable to write");
166 /* scan - main loop */
167 for (compnum = 1; ; state = m_getfld (state, name, tmpbuf, rlwidth, inb)) {
174 if ( putc (':', scnout) == EOF) DIEWRERR();
178 * if we're interested in this component, save a pointer
179 * to the component text, then start using our next free
180 * buffer as the component temp buffer (buffer switching
181 * saves an extra copy of the component text).
183 if ((cptr = wantcomp[CHASH(name)])) {
185 if (!mh_strcasecmp(name, cptr->c_name)) {
186 if (! cptr->c_text) {
187 cptr->c_text = tmpbuf;
188 for (cp = tmpbuf + strlen (tmpbuf) - 1;
199 } while ((cptr = cptr->c_next));
202 while (state == FLDPLUS) {
203 state = m_getfld (state, name, tmpbuf, rlwidth, inb);
212 state = FILEEOF; /* stop now if scan cmd */
215 if (putc ('\n', scnout) == EOF) DIEWRERR();
218 * performance hack: some people like to run "inc" on
219 * things like net.sources or large digests. We do a
220 * copy directly into the output buffer rather than
221 * going through an intermediate buffer.
223 * We need the amount of data m_getfld found & don't
224 * want to do a strlen on the long buffer so there's
225 * a hack in m_getfld to save the amount of data it
226 * returned in the global "msg_count".
229 while (state == BODY) {
231 if (scnout->_IO_write_ptr == scnout->_IO_write_end) {
232 #elif defined(__DragonFly__)
233 if (((struct __FILE_public *)scnout)->_w <= 0) {
235 if (scnout->_cnt <= 0) {
237 if (fflush(scnout) == EOF)
241 state = m_getfld(state, name, scnout->_IO_write_ptr,
242 (long)scnout->_IO_write_ptr-(long)scnout->_IO_write_end , inb);
243 scnout->_IO_write_ptr += msg_count;
244 #elif defined(__DragonFly__)
245 state = m_getfld( state, name, ((struct __FILE_public *)scnout)->_p, -(((struct __FILE_public *)scnout)->_w), inb );
246 ((struct __FILE_public *)scnout)->_w -= msg_count;
247 ((struct __FILE_public *)scnout)->_p += msg_count;
249 state = m_getfld( state, name, scnout->_ptr, -(scnout->_cnt), inb );
250 scnout->_cnt -= msg_count;
251 scnout->_ptr += msg_count;
259 innum ? "??Format error (message %d) in "
260 : "??Format error in ",
261 outnum ? outnum : innum);
262 fprintf (stderr, "component %d\n", compnum);
265 FPUTS ("\n\nBAD MSG:\n");
267 if (putc ('\n', scnout) == EOF) DIEWRERR();
277 adios (NULL, "getfld() returned %d", state);
282 * format and output the scan line.
286 advise("read", "unable to"); /* "read error" */
290 /* Save and restore buffer so we don't trash our dynamic pool! */
292 saved_c_text = bodycomp->c_text;
293 bodycomp->c_text = tmpbuf;
300 dat[2] = ftell(scnout);
301 if (dat[2] == EOF) DIEWRERR();
304 if ((datecomp && !datecomp->c_text) || (!size && !outnum)) {
307 fstat (fileno(inb), &st);
308 if (!size && !outnum)
311 if (! datecomp->c_text) {
312 if (datecomp->c_tws == NULL)
313 datecomp->c_tws = (struct tws *)
314 calloc((size_t) 1, sizeof(*datecomp->c_tws));
315 if (datecomp->c_tws == NULL)
316 adios (NULL, "unable to allocate tws buffer");
317 *datecomp->c_tws = *dlocaltime ((time_t *) &st.st_mtime);
318 datecomp->c_flags |= CF_DATEFAB|CF_TRUE;
320 datecomp->c_flags &= ~CF_DATEFAB;
325 fmt_scan (fmt, scanl, slwidth, dat);
328 fmt = fmt_scan (fmt, scanl, slwidth, dat);
330 fmt = fmt_top; /* reset for old format files */
334 bodycomp->c_text = saved_c_text;
337 fputs (scanl, stdout);
339 FINDCOMP (cptr, "encrypted");
340 encrypted = cptr && cptr->c_text;
342 /* return dynamically allocated buffers to pool */
343 while ((cptr = *savecomp++)) {
344 *--nxtbuf = cptr->c_text;
349 if (outnum && (ferror(scnout) || fclose (scnout) == EOF))
352 return (state != FILEEOF ? SCNERR : encrypted ? SCNENC : SCNMSG);
357 * Cheat: we are loaded with adrparse, which wants a routine called
358 * OfficialName(). We call adrparse:getm() with the correct arguments
359 * to prevent OfficialName() from being called. Hence, the following
360 * is to keep the loader happy.
363 OfficialName (char *name)
370 mh_fputs(char *s, FILE *stream)
375 if (putc (c,stream) == EOF )