3 * scansbr.c -- routines to help scan along...
10 #include <h/fmt_scan.h>
11 #include <h/scansbr.h>
15 # define _ptr _p /* Gag */
16 # define _cnt _w /* Wretch */
23 # define _filbuf(fp) ((fp)->__cnt = 0, __filbuf(fp))
26 #define MAXSCANL 256 /* longest possible scan line */
29 * Buffer size for content part of header fields. We want this
30 * to be large enough so that we don't do a lot of extra FLDPLUS
31 * calls on m_getfld but small enough so that we don't snarf
32 * the entire message body when we're only going to display 30
37 static struct format *fmt;
39 static struct format *fmt_top;
42 static struct comp *datecomp; /* pntr to "date" comp */
43 static struct comp *bodycomp; /* pntr to "body" pseudo-comp *
45 static int ncomps = 0; /* # of interesting components */
46 static char **compbuffers = 0; /* buffers for component text */
47 static struct comp **used_buf = 0; /* stack for comp that use buffers */
49 static int dat[5]; /* aux. data for format routine */
51 char *scanl = 0; /* text of most recent scanline */
53 #define DIEWRERR() adios (scnmsg, "write error on")
56 if (mh_fputs(buf,scnout) == EOF)\
63 int sc_width (void); /* from termsbr.c */
64 static int mh_fputs(char *, FILE *);
68 scan (FILE *inb, int innum, int outnum, char *nfs, int width, int curflg,
69 int unseen, char *folder, long size, int noisy)
71 int i, compnum, encrypted, state;
72 char *cp, *tmpbuf, **nxtbuf;
75 struct comp **savecomp;
79 static int rlwidth, slwidth;
82 char returnpath[BUFSIZ];
83 char deliverydate[BUFSIZ];
86 /* first-time only initialization */
89 if ((width = sc_width ()) < WIDTH/2)
91 else if (width > MAXSCANL)
94 dat[3] = slwidth = width;
95 if ((scanl = (char *) malloc((size_t) (slwidth + 2) )) == NULL)
96 adios (NULL, "unable to malloc scan line (%d bytes)", slwidth+2);
100 /* Compile format string */
101 ncomps = fmt_compile (nfs, &fmt) + 1;
106 FINDCOMP(bodycomp, "body");
107 FINDCOMP(datecomp, "date");
108 FINDCOMP(cptr, "folder");
110 cptr->c_text = folder;
111 FINDCOMP(cptr, "encrypted");
113 if ((cptr = (struct comp *) calloc (1, sizeof(*cptr)))) {
114 cptr->c_name = "encrypted";
115 cptr->c_next = wantcomp[i = CHASH (cptr->c_name)];
119 FINDCOMP (cptr, "dtimenow");
121 cptr->c_text = getcpy(dtimenow (0));
122 nxtbuf = compbuffers = (char **) calloc((size_t) ncomps, sizeof(char *));
124 adios (NULL, "unable to allocate component buffers");
125 used_buf = (struct comp **) calloc((size_t) (ncomps+1),
126 sizeof(struct comp *));
127 if (used_buf == NULL)
128 adios (NULL, "unable to allocate component buffer stack");
129 used_buf += ncomps+1; *--used_buf = 0;
130 rlwidth = bodycomp && (width > SBUFSIZ) ? width : SBUFSIZ;
131 for (i = ncomps; i--; )
132 if ((*nxtbuf++ = malloc(rlwidth)) == NULL)
133 adios (NULL, "unable to allocate component buffer");
137 * each-message initialization
139 nxtbuf = compbuffers;
142 dat[0] = innum ? innum : outnum;
147 * Get the first field. If the message is non-empty
148 * and we're doing an "inc", open the output file.
150 if ((state = m_getfld (FLD, name, tmpbuf, rlwidth, inb)) == FILEEOF) {
152 advise("read", "unable to"); /* "read error" */
161 scnmsg = m_name (outnum);
162 if (*scnmsg == '?') /* msg num out of range */
165 scnmsg = "/dev/null";
167 if ((scnout = fopen (scnmsg, "w")) == NULL)
168 adios (scnmsg, "unable to write");
171 * Add the Return-Path and Delivery-Date
172 * header fields to message.
174 if (get_returnpath (returnpath, sizeof(returnpath),
175 deliverydate, sizeof(deliverydate))) {
176 FPUTS ("Return-Path: ");
178 FPUTS ("Delivery-Date: ");
179 FPUTS (deliverydate);
184 /* scan - main loop */
185 for (compnum = 1; ; state = m_getfld (state, name, tmpbuf, rlwidth, inb)) {
192 if ( putc (':', scnout) == EOF) DIEWRERR();
196 * if we're interested in this component, save a pointer
197 * to the component text, then start using our next free
198 * buffer as the component temp buffer (buffer switching
199 * saves an extra copy of the component text).
201 if ((cptr = wantcomp[CHASH(name)])) {
203 if (!strcasecmp(name, cptr->c_name)) {
204 if (! cptr->c_text) {
205 cptr->c_text = tmpbuf;
206 for (cp = tmpbuf + strlen (tmpbuf) - 1;
217 } while ((cptr = cptr->c_next));
220 while (state == FLDPLUS) {
221 state = m_getfld (state, name, tmpbuf, rlwidth, inb);
230 state = FILEEOF; /* stop now if scan cmd */
233 if (putc ('\n', scnout) == EOF) DIEWRERR();
236 * performance hack: some people like to run "inc" on
237 * things like net.sources or large digests. We do a
238 * copy directly into the output buffer rather than
239 * going through an intermediate buffer.
241 * We need the amount of data m_getfld found & don't
242 * want to do a strlen on the long buffer so there's
243 * a hack in m_getfld to save the amount of data it
244 * returned in the global "msg_count".
247 while (state == BODY) {
249 if (scnout->_IO_write_ptr == scnout->_IO_write_end) {
251 if (scnout->_cnt <= 0) {
253 if (fflush(scnout) == EOF)
257 state = m_getfld(state, name, scnout->_IO_write_ptr,
258 (long)scnout->_IO_write_ptr-(long)scnout->_IO_write_end , inb);
259 scnout->_IO_write_ptr += msg_count;
261 state = m_getfld( state, name, scnout->_ptr, -(scnout->_cnt), inb );
262 scnout->_cnt -= msg_count;
263 scnout->_ptr += msg_count;
271 innum ? "??Format error (message %d) in "
272 : "??Format error in ",
273 outnum ? outnum : innum);
274 fprintf (stderr, "component %d\n", compnum);
277 FPUTS ("\n\nBAD MSG:\n");
279 if (putc ('\n', scnout) == EOF) DIEWRERR();
289 adios (NULL, "getfld() returned %d", state);
294 * format and output the scan line.
298 advise("read", "unable to"); /* "read error" */
302 /* Save and restore buffer so we don't trash our dynamic pool! */
304 saved_c_text = bodycomp->c_text;
305 bodycomp->c_text = tmpbuf;
312 dat[2] = ftell(scnout);
313 if (dat[2] == EOF) DIEWRERR();
316 if ((datecomp && !datecomp->c_text) || (!size && !outnum)) {
319 fstat (fileno(inb), &st);
320 if (!size && !outnum)
323 if (! datecomp->c_text) {
324 if (datecomp->c_tws == NULL)
325 datecomp->c_tws = (struct tws *)
326 calloc((size_t) 1, sizeof(*datecomp->c_tws));
327 if (datecomp->c_tws == NULL)
328 adios (NULL, "unable to allocate tws buffer");
329 *datecomp->c_tws = *dlocaltime ((time_t *) &st.st_mtime);
330 datecomp->c_flags = -1;
332 datecomp->c_flags = 0;
337 fmt_scan (fmt, scanl, slwidth, dat);
340 fmt = fmt_scan (fmt, scanl, slwidth, dat);
342 fmt = fmt_top; /* reset for old format files */
346 bodycomp->c_text = saved_c_text;
349 fputs (scanl, stdout);
351 FINDCOMP (cptr, "encrypted");
352 encrypted = cptr && cptr->c_text;
354 /* return dynamically allocated buffers to pool */
355 while ((cptr = *savecomp++)) {
356 *--nxtbuf = cptr->c_text;
361 if (outnum && (ferror(scnout) || fclose (scnout) == EOF))
364 return (state != FILEEOF ? SCNERR : encrypted ? SCNENC : SCNMSG);
369 * Cheat: we are loaded with adrparse, which wants a routine called
370 * OfficialName(). We call adrparse:getm() with the correct arguments
371 * to prevent OfficialName() from being called. Hence, the following
372 * is to keep the loader happy.
375 OfficialName (char *name)
382 mh_fputs(char *s, FILE *stream)
387 if (putc (c,stream) == EOF )