2 ** scansbr.c -- routines to help scan along...
4 ** This code is Copyright (c) 2002, by the authors of nmh. See the
5 ** COPYRIGHT file in the root directory of the nmh distribution for
6 ** complete copyright information.
10 #include <h/addrsbr.h>
11 #include <h/fmt_scan.h>
12 #include <h/scansbr.h>
17 # define _ptr _p /* Gag */
18 # define _cnt _w /* Wretch */
25 # define _filbuf(fp) ((fp)->__cnt = 0, __filbuf(fp))
28 #define MAXSCANL 256 /* longest possible scan line */
31 ** Buffer size for content part of header fields. We want this
32 ** to be large enough so that we don't do a lot of extra FLDPLUS
33 ** calls on m_getfld but small enough so that we don't snarf
34 ** the entire message body when we're only going to display 30
39 static struct format *fmt;
41 static struct comp *datecomp; /* pntr to "date" comp */
42 static struct comp *bodycomp; /* pntr to "body" pseudo-comp (if referenced) */
43 static int ncomps = 0; /* # of interesting components */
44 static char **compbuffers = NULL; /* buffers for component text */
45 static struct comp **used_buf = NULL; /* stack for comp that use buffers */
47 static int dat[5]; /* aux. data for format routine */
49 char *scanl = NULL; /* text of most recent scanline */
51 #define DIEWRERR() adios(scnmsg, "write error on")
54 if (fputs(buf,scnout) == EOF)\
61 int sc_width(void); /* from termsbr.c */
63 #ifdef MULTIBYTE_SUPPORT
64 #define SCAN_CHARWIDTH MB_CUR_MAX
66 #define SCAN_CHARWIDTH 1
70 scan(FILE *inb, int innum, int outnum, char *fmtstr, int width, int curflg,
73 int i, compnum, state;
74 unsigned char *cp, *tmpbuf;
76 char *saved_c_text = NULL;
78 struct comp **savecomp;
82 static int rlwidth, slwidth;
85 char returnpath[BUFSIZ];
86 char deliverydate[BUFSIZ];
89 /* first-time only initialization */
92 if ((width = sc_width()) < WIDTH/2)
94 else if (width > MAXSCANL)
97 dat[3] = slwidth = width;
98 scanl = (char *) mh_xmalloc((size_t) SCAN_CHARWIDTH *
103 /* Compile format string */
104 ncomps = fmt_compile(fmtstr, &fmt) + 1;
106 FINDCOMP(bodycomp, "body");
107 FINDCOMP(datecomp, "date");
108 nxtbuf = compbuffers = (char **) calloc((size_t) ncomps,
111 adios(NULL, "unable to allocate component buffers");
112 used_buf = (struct comp **) calloc((size_t) (ncomps+1),
113 sizeof(struct comp *));
114 if (used_buf == NULL)
115 adios(NULL, "unable to allocate component buffer stack");
116 used_buf += ncomps+1; *--used_buf = 0;
117 rlwidth = bodycomp && (width > SBUFSIZ) ? width : SBUFSIZ;
118 for (i = ncomps; i--; )
119 *nxtbuf++ = mh_xmalloc(rlwidth);
123 ** each-message initialization
125 nxtbuf = compbuffers;
128 dat[0] = innum ? innum : outnum;
133 ** Get the first field. If the message is non-empty
134 ** and we're doing an "inc", open the output file.
136 if ((state = m_getfld(FLD, name, tmpbuf, rlwidth, inb)) == FILEEOF) {
138 advise("read", "unable to"); /* "read error" */
147 scnmsg = m_name(outnum);
148 if (*scnmsg == '?') /* msg num out of range */
151 scnmsg = "/dev/null";
153 if ((scnout = fopen(scnmsg, "w")) == NULL)
154 adios(scnmsg, "unable to write");
157 ** Add the Return-Path and Delivery-Date
158 ** header fields to message.
160 if (get_returnpath(returnpath, sizeof(returnpath),
161 deliverydate, sizeof(deliverydate))) {
162 FPUTS("Return-Path: ");
164 FPUTS("Delivery-Date: ");
170 /* scan - main loop */
172 state = m_getfld(state, name, tmpbuf, rlwidth, inb)) {
179 if (putc(':', scnout) == EOF)
184 ** if we're interested in this component, save
185 ** a pointer to the component text, then start
186 ** using our next free buffer as the component
187 ** temp buffer (buffer switching saves an extra
188 ** copy of the component text).
190 if ((cptr = wantcomp[CHASH(name)])) {
192 if (!mh_strcasecmp(name, cptr->c_name)) {
193 if (! cptr->c_text) {
194 cptr->c_text = tmpbuf;
195 for (cp = tmpbuf + strlen(tmpbuf) - 1; cp >= tmpbuf; cp--)
205 } while ((cptr = cptr->c_next));
208 while (state == FLDPLUS) {
209 state = m_getfld(state, name, tmpbuf, rlwidth,
219 state = FILEEOF; /* stop now if scan cmd */
222 if (putc('\n', scnout) == EOF) DIEWRERR();
225 ** performance hack: some people like to run "inc"
226 ** on things like net.sources or large digests.
227 ** We do a copy directly into the output buffer
228 ** rather than going through an intermediate buffer.
230 ** We need the amount of data m_getfld found &
231 ** don't want to do a strlen on the long buffer so
232 ** there's a hack in m_getfld to save the amount
233 ** of data it returned in the global "msg_count".
236 while (state == BODY) {
238 if (scnout->_IO_write_ptr == scnout->_IO_write_end) {
239 #elif defined(__DragonFly__)
240 if (((struct __FILE_public *)scnout)->_w <= 0) {
242 if (scnout->_cnt <= 0) {
244 if (fflush(scnout) == EOF)
248 state = m_getfld(state, name, scnout->_IO_write_ptr, (long)scnout->_IO_write_ptr-(long)scnout->_IO_write_end , inb);
249 scnout->_IO_write_ptr += msg_count;
250 #elif defined(__DragonFly__)
251 state = m_getfld(state, name, ((struct __FILE_public *)scnout)->_p, -(((struct __FILE_public *)scnout)->_w), inb);
252 ((struct __FILE_public *)scnout)->_w -= msg_count;
253 ((struct __FILE_public *)scnout)->_p += msg_count;
255 state = m_getfld( state, name, scnout->_ptr, -(scnout->_cnt), inb);
256 scnout->_cnt -= msg_count;
257 scnout->_ptr += msg_count;
264 fprintf(stderr, innum ? "??Format error (message %d) in " : "??Format error in ", outnum ? outnum : innum);
265 fprintf(stderr, "component %d\n", compnum);
268 FPUTS("\n\nBAD MSG:\n");
270 if (putc('\n', scnout) == EOF)
281 adios(NULL, "getfld() returned %d", state);
286 ** format and output the scan line.
290 advise("read", "unable to"); /* "read error" */
294 /* Save and restore buffer so we don't trash our dynamic pool! */
296 saved_c_text = bodycomp->c_text;
297 bodycomp->c_text = tmpbuf;
301 dat[2] = ftell(scnout);
306 if ((datecomp && !datecomp->c_text) || !outnum) {
309 fstat(fileno(inb), &st);
313 if (! datecomp->c_text) {
314 if (datecomp->c_tws == NULL)
315 datecomp->c_tws = (struct tws *) calloc((size_t) 1, sizeof(*datecomp->c_tws));
316 if (datecomp->c_tws == NULL)
317 adios(NULL, "unable to allocate tws buffer");
318 *datecomp->c_tws = *dlocaltime((time_t *) &st.st_mtime);
319 datecomp->c_flags |= CF_DATEFAB|CF_TRUE;
321 datecomp->c_flags &= ~CF_DATEFAB;
326 fmt_scan(fmt, scanl, slwidth, dat);
329 bodycomp->c_text = saved_c_text;
332 fputs(scanl, stdout);
334 /* return dynamically allocated buffers to pool */
335 while ((cptr = *savecomp++)) {
336 *--nxtbuf = cptr->c_text;
341 if (outnum && (ferror(scnout) || fclose(scnout) == EOF))
344 return (state != FILEEOF ? SCNERR : SCNMSG);