3 * scansbr.c -- routines to help scan along...
10 #include <h/fmt_scan.h>
11 #include <h/scansbr.h>
12 #include <zotnet/tws/tws.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 */
54 if (mh_fputs(buf,scnout) == EOF)\
55 adios (scnmsg, "write error on");\
61 int sc_width (void); /* from termsbr.c */
62 static int mh_fputs(char *, FILE *);
66 scan (FILE *inb, int innum, int outnum, char *nfs, int width, int curflg,
67 int unseen, char *folder, long size, int noisy)
69 int i, compnum, encrypted, state;
70 char *cp, *tmpbuf, **nxtbuf;
73 struct comp **savecomp;
77 static int rlwidth, slwidth;
80 char returnpath[BUFSIZ];
81 char deliverydate[BUFSIZ];
84 /* first-time only initialization */
87 if ((width = sc_width ()) < WIDTH/2)
89 else if (width > MAXSCANL)
92 dat[3] = slwidth = width;
93 if ((scanl = (char *) malloc((size_t) (slwidth + 2) )) == NULL)
94 adios (NULL, "unable to malloc scan line (%d bytes)", slwidth+2);
98 /* Compile format string */
99 ncomps = fmt_compile (nfs, &fmt) + 1;
104 FINDCOMP(bodycomp, "body");
105 FINDCOMP(datecomp, "date");
106 FINDCOMP(cptr, "folder");
108 cptr->c_text = folder;
109 FINDCOMP(cptr, "encrypted");
111 if ((cptr = (struct comp *) calloc (1, sizeof(*cptr)))) {
112 cptr->c_name = "encrypted";
113 cptr->c_next = wantcomp[i = CHASH (cptr->c_name)];
117 FINDCOMP (cptr, "dtimenow");
119 cptr->c_text = getcpy(dtimenow (0));
120 nxtbuf = compbuffers = (char **) calloc((size_t) ncomps, sizeof(char *));
122 adios (NULL, "unable to allocate component buffers");
123 used_buf = (struct comp **) calloc((size_t) (ncomps+1),
124 sizeof(struct comp *));
125 if (used_buf == NULL)
126 adios (NULL, "unable to allocate component buffer stack");
127 used_buf += ncomps+1; *--used_buf = 0;
128 rlwidth = bodycomp && (width > SBUFSIZ) ? width : SBUFSIZ;
129 for (i = ncomps; i--; )
130 if ((*nxtbuf++ = malloc(rlwidth)) == NULL)
131 adios (NULL, "unable to allocate component buffer");
135 * each-message initialization
137 nxtbuf = compbuffers;
140 dat[0] = innum ? innum : outnum;
145 * Get the first field. If the message is non-empty
146 * and we're doing an "inc", open the output file.
148 if ((state = m_getfld (FLD, name, tmpbuf, rlwidth, inb)) == FILEEOF) {
150 advise("read", "unable to"); /* "read error" */
159 scnmsg = m_name (outnum);
160 if (*scnmsg == '?') /* msg num out of range */
163 scnmsg = "/dev/null";
165 if ((scnout = fopen (scnmsg, "w")) == NULL)
166 adios (scnmsg, "unable to write");
169 * Add the Return-Path and Delivery-Date
170 * header fields to message.
172 if (get_returnpath (returnpath, sizeof(returnpath),
173 deliverydate, sizeof(deliverydate))) {
174 FPUTS ("Return-Path: ");
176 FPUTS ("Delivery-Date: ");
177 FPUTS (deliverydate);
182 /* scan - main loop */
183 for (compnum = 1; ; state = m_getfld (state, name, tmpbuf, rlwidth, inb)) {
194 * if we're interested in this component, save a pointer
195 * to the component text, then start using our next free
196 * buffer as the component temp buffer (buffer switching
197 * saves an extra copy of the component text).
199 if ((cptr = wantcomp[CHASH(name)])) {
201 if (!strcasecmp(name, cptr->c_name)) {
202 if (! cptr->c_text) {
203 cptr->c_text = tmpbuf;
204 for (cp = tmpbuf + strlen (tmpbuf) - 1;
215 } while ((cptr = cptr->c_next));
218 while (state == FLDPLUS) {
219 state = m_getfld (state, name, tmpbuf, rlwidth, inb);
228 state = FILEEOF; /* stop now if scan cmd */
234 * performance hack: some people like to run "inc" on
235 * things like net.sources or large digests. We do a
236 * copy directly into the output buffer rather than
237 * going through an intermediate buffer.
239 * We need the amount of data m_getfld found & don't
240 * want to do a strlen on the long buffer so there's
241 * a hack in m_getfld to save the amount of data it
242 * returned in the global "msg_count".
245 while (state == BODY) {
247 if (scnout->_IO_write_ptr == scnout->_IO_write_end) {
249 if (scnout->_cnt <= 0) {
251 if (fflush(scnout) == EOF)
252 adios (scnmsg, "write error on");
255 state = m_getfld(state, name, scnout->_IO_write_ptr,
256 (long)scnout->_IO_write_ptr-(long)scnout->_IO_write_end , inb);
257 scnout->_IO_write_ptr += msg_count;
259 state = m_getfld( state, name, scnout->_ptr, -(scnout->_cnt), inb );
260 scnout->_cnt -= msg_count;
261 scnout->_ptr += msg_count;
269 innum ? "??Format error (message %d) in "
270 : "??Format error in ",
271 outnum ? outnum : innum);
272 fprintf (stderr, "component %d\n", compnum);
275 FPUTS ("\n\nBAD MSG:\n");
287 adios (NULL, "getfld() returned %d", state);
292 * format and output the scan line.
296 advise("read", "unable to"); /* "read error" */
300 /* Save and restore buffer so we don't trash our dynamic pool! */
302 saved_c_text = bodycomp->c_text;
303 bodycomp->c_text = tmpbuf;
309 dat[2] = ftell(scnout);
311 if ((datecomp && !datecomp->c_text) || (!size && !outnum)) {
314 fstat (fileno(inb), &st);
315 if (!size && !outnum)
318 if (! datecomp->c_text) {
319 if (datecomp->c_tws == NULL)
320 datecomp->c_tws = (struct tws *)
321 calloc((size_t) 1, sizeof(*datecomp->c_tws));
322 if (datecomp->c_tws == NULL)
323 adios (NULL, "unable to allocate tws buffer");
324 *datecomp->c_tws = *dlocaltime ((time_t *) &st.st_mtime);
325 datecomp->c_flags = -1;
327 datecomp->c_flags = 0;
332 fmt_scan (fmt, scanl, slwidth, dat);
335 fmt = fmt_scan (fmt, scanl, slwidth, dat);
337 fmt = fmt_top; /* reset for old format files */
341 bodycomp->c_text = saved_c_text;
344 fputs (scanl, stdout);
346 FINDCOMP (cptr, "encrypted");
347 encrypted = cptr && cptr->c_text;
349 /* return dynamically allocated buffers to pool */
350 while ((cptr = *savecomp++)) {
351 *--nxtbuf = cptr->c_text;
356 if (outnum && (ferror(scnout) || fclose (scnout) == EOF))
357 adios (scnmsg, "write error on");
359 return (state != FILEEOF ? SCNERR : encrypted ? SCNENC : SCNMSG);
364 * Cheat: we are loaded with adrparse, which wants a routine called
365 * OfficialName(). We call adrparse:getm() with the correct arguments
366 * to prevent OfficialName() from being called. Hence, the following
367 * is to keep the loader happy.
370 OfficialName (char *name)
377 mh_fputs(char *s, FILE *stream)
382 if (putc (c,stream) == EOF )