git.marmaro.de Git - mmh/blob - uip/scansbr.c

   1 /*
   2 ** scansbr.c -- routines to help scan along...
   3 **
   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.
   7 */
   8
   9 #include <h/mh.h>
  10 #include <h/addrsbr.h>
  11 #include <h/fmt_scan.h>
  12 #include <h/scansbr.h>
  13 #include <h/tws.h>
  14 #include <h/utils.h>
  15
  16 #ifdef _FSTDIO
  17 # define _ptr _p  /* Gag */
  18 # define _cnt _w  /* Wretch */
  19 #endif
  20
  21 #ifdef SCO_5_STDIO
  22 # define _ptr  __ptr
  23 # define _cnt  __cnt
  24 # define _base __base
  25 # define _filbuf(fp)  ((fp)->__cnt = 0, __filbuf(fp))
  26 #endif
  27
  28 #define MAXSCANL 256  /* longest possible scan line */
  29
  30 /*
  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
  35 ** characters of it.
  36 */
  37 #define SBUFSIZ 512
  38
  39 static struct format *fmt;
  40
  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 = 0;  /* buffers for component text */
  45 static struct comp **used_buf = 0;  /* stack for comp that use buffers */
  46
  47 static int dat[5];  /* aux. data for format routine */
  48
  49 char *scanl = 0;  /* text of most recent scanline */
  50
  51 #define DIEWRERR() adios(scnmsg, "write error on")
  52
  53 #define FPUTS(buf) {\
  54                 if (mh_fputs(buf,scnout) == EOF)\
  55                         DIEWRERR();\
  56         }
  57
  58 /*
  59 ** prototypes
  60 */
  61 int sc_width(void);  /* from termsbr.c */
  62 static int mh_fputs(char *, FILE *);
  63
  64 #ifdef MULTIBYTE_SUPPORT
  65 #define SCAN_CHARWIDTH MB_CUR_MAX
  66 #else
  67 #define SCAN_CHARWIDTH 1
  68 #endif
  69
  70 int
  71 scan(FILE *inb, int innum, int outnum, char *nfs, int width, int curflg,
  72         int unseen, char *folder, long size, int noisy)
  73 {
  74         int i, compnum, state;
  75         unsigned char *cp, *tmpbuf;
  76         char **nxtbuf;
  77         char *saved_c_text = NULL;
  78         struct comp *cptr;
  79         struct comp **savecomp;
  80         char *scnmsg = NULL;
  81         FILE *scnout = NULL;
  82         char name[NAMESZ];
  83         static int rlwidth, slwidth;
  84
  85 #ifdef RPATHS
  86         char returnpath[BUFSIZ];
  87         char deliverydate[BUFSIZ];
  88 #endif
  89
  90         /* first-time only initialization */
  91         if (!scanl) {
  92                 if (width == 0) {
  93                         if ((width = sc_width()) < WIDTH/2)
  94                                 width = WIDTH/2;
  95                         else if (width > MAXSCANL)
  96                                 width = MAXSCANL;
  97                 }
  98                 dat[3] = slwidth = width;
  99                 scanl = (char *) mh_xmalloc((size_t) SCAN_CHARWIDTH *
 100                                 (slwidth + 2) );
 101                 if (outnum)
 102                         umask(~m_gmprot());
 103
 104                 /* Compile format string */
 105                 ncomps = fmt_compile(nfs, &fmt) + 1;
 106
 107                 FINDCOMP(bodycomp, "body");
 108                 FINDCOMP(datecomp, "date");
 109                 FINDCOMP(cptr, "folder");
 110                 if (cptr && folder)
 111                         cptr->c_text = folder;
 112                 FINDCOMP(cptr, "dtimenow");
 113                 if (cptr)
 114                         cptr->c_text = getcpy(dtimenow(0));
 115                 nxtbuf = compbuffers = (char **) calloc((size_t) ncomps,
 116                                 sizeof(char *));
 117                 if (nxtbuf == NULL)
 118                         adios(NULL, "unable to allocate component buffers");
 119                 used_buf = (struct comp **) calloc((size_t) (ncomps+1),
 120                         sizeof(struct comp *));
 121                 if (used_buf == NULL)
 122                         adios(NULL, "unable to allocate component buffer stack");
 123                 used_buf += ncomps+1; *--used_buf = 0;
 124                 rlwidth = bodycomp && (width > SBUFSIZ) ? width : SBUFSIZ;
 125                 for (i = ncomps; i--; )
 126                         *nxtbuf++ = mh_xmalloc(rlwidth);
 127         }
 128
 129         /*
 130         ** each-message initialization
 131         */
 132         nxtbuf = compbuffers;
 133         savecomp = used_buf;
 134         tmpbuf = *nxtbuf++;
 135         dat[0] = innum ? innum : outnum;
 136         dat[1] = curflg;
 137         dat[4] = unseen;
 138
 139         /*
 140         ** Get the first field.  If the message is non-empty
 141         ** and we're doing an "inc", open the output file.
 142         */
 143         if ((state = m_getfld(FLD, name, tmpbuf, rlwidth, inb)) == FILEEOF) {
 144                 if (ferror(inb)) {
 145                         advise("read", "unable to"); /* "read error" */
 146                         return SCNFAT;
 147                 } else {
 148                         return SCNEOF;
 149                 }
 150         }
 151
 152         if (outnum) {
 153                 if (outnum > 0) {
 154                         scnmsg = m_name(outnum);
 155                         if (*scnmsg == '?')  /* msg num out of range */
 156                                 return SCNNUM;
 157                 } else {
 158                         scnmsg = "/dev/null";
 159                 }
 160                 if ((scnout = fopen(scnmsg, "w")) == NULL)
 161                         adios(scnmsg, "unable to write");
 162 #ifdef RPATHS
 163                 /*
 164                 ** Add the Return-Path and Delivery-Date
 165                 ** header fields to message.
 166                 */
 167                 if (get_returnpath(returnpath, sizeof(returnpath),
 168                                 deliverydate, sizeof(deliverydate))) {
 169                         FPUTS("Return-Path: ");
 170                         FPUTS(returnpath);
 171                         FPUTS("Delivery-Date: ");
 172                         FPUTS(deliverydate);
 173                 }
 174 #endif /* RPATHS */
 175         }
 176
 177         /* scan - main loop */
 178         for (compnum = 1; ;
 179                         state = m_getfld(state, name, tmpbuf, rlwidth, inb)) {
 180                 switch (state) {
 181                 case FLD:
 182                 case FLDPLUS:
 183                         compnum++;
 184                         if (outnum) {
 185                                 FPUTS(name);
 186                                 if (putc(':', scnout) == EOF)
 187                                         DIEWRERR();
 188                                 FPUTS(tmpbuf);
 189                         }
 190                         /*
 191                         ** if we're interested in this component, save
 192                         ** a pointer to the component text, then start
 193                         ** using our next free buffer as the component
 194                         ** temp buffer (buffer switching saves an extra
 195                         ** copy of the component text).
 196                         */
 197                         if ((cptr = wantcomp[CHASH(name)])) {
 198                                 do {
 199                                         if (!mh_strcasecmp(name, cptr->c_name)) {
 200                                                 if (! cptr->c_text) {
 201                                                         cptr->c_text = tmpbuf;
 202                                                         for (cp = tmpbuf + strlen(tmpbuf) - 1; cp >= tmpbuf; cp--)
 203                                                                 if (isspace(*cp))
 204                                                                         *cp = 0;
 205                                                                 else
 206                                                                         break;
 207                                                         *--savecomp = cptr;
 208                                                         tmpbuf = *nxtbuf++;
 209                                                 }
 210                                                 break;
 211                                         }
 212                                 } while ((cptr = cptr->c_next));
 213                         }
 214
 215                         while (state == FLDPLUS) {
 216                                 state = m_getfld(state, name, tmpbuf, rlwidth,
 217                                                 inb);
 218                                 if (outnum)
 219                                         FPUTS(tmpbuf);
 220                         }
 221                         break;
 222
 223                 case BODY:
 224                         compnum = -1;
 225                         if (! outnum) {
 226                                 state = FILEEOF; /* stop now if scan cmd */
 227                                 goto finished;
 228                         }
 229                         if (putc('\n', scnout) == EOF) DIEWRERR();
 230                         FPUTS(tmpbuf);
 231                         /*
 232                         ** performance hack: some people like to run "inc"
 233                         ** on things like net.sources or large digests.
 234                         ** We do a copy directly into the output buffer
 235                         ** rather than going through an intermediate buffer.
 236                         **
 237                         ** We need the amount of data m_getfld found &
 238                         ** don't want to do a strlen on the long buffer so
 239                         ** there's a hack in m_getfld to save the amount
 240                         ** of data it returned in the global "msg_count".
 241                         */
 242 body:;
 243                         while (state == BODY) {
 244 #ifdef LINUX_STDIO
 245                                 if (scnout->_IO_write_ptr == scnout->_IO_write_end) {
 246 #elif defined(__DragonFly__)
 247                                 if (((struct __FILE_public *)scnout)->_w <= 0) {
 248 #else
 249                                 if (scnout->_cnt <= 0) {
 250 #endif
 251                                         if (fflush(scnout) == EOF)
 252                                                 DIEWRERR();
 253                                 }
 254 #ifdef LINUX_STDIO
 255                                 state = m_getfld(state, name, scnout->_IO_write_ptr, (long)scnout->_IO_write_ptr-(long)scnout->_IO_write_end , inb);
 256                                 scnout->_IO_write_ptr += msg_count;
 257 #elif defined(__DragonFly__)
 258                                 state = m_getfld(state, name, ((struct __FILE_public *)scnout)->_p, -(((struct __FILE_public *)scnout)->_w), inb);
 259                                 ((struct __FILE_public *)scnout)->_w -= msg_count;
 260                                 ((struct __FILE_public *)scnout)->_p += msg_count;
 261 #else
 262                                 state = m_getfld( state, name, scnout->_ptr, -(scnout->_cnt), inb);
 263                                 scnout->_cnt -= msg_count;
 264                                 scnout->_ptr += msg_count;
 265 #endif
 266                         }
 267                         goto finished;
 268
 269                 case LENERR:
 270                 case FMTERR:
 271                         fprintf(stderr, innum ? "??Format error (message %d) in " : "??Format error in ", outnum ? outnum : innum);
 272                         fprintf(stderr, "component %d\n", compnum);
 273
 274                         if (outnum) {
 275                                 FPUTS("\n\nBAD MSG:\n");
 276                                 FPUTS(name);
 277                                 if (putc('\n', scnout) == EOF)
 278                                         DIEWRERR();
 279                                 state = BODY;
 280                                 goto body;
 281                         }
 282                         /* fall through */
 283
 284                 case FILEEOF:
 285                         goto finished;
 286
 287                 default:
 288                         adios(NULL, "getfld() returned %d", state);
 289                 }
 290         }
 291
 292         /*
 293         ** format and output the scan line.
 294         */
 295 finished:
 296         if (ferror(inb)) {
 297                 advise("read", "unable to"); /* "read error" */
 298                 return SCNFAT;
 299         }
 300
 301         /* Save and restore buffer so we don't trash our dynamic pool! */
 302         if (bodycomp) {
 303                 saved_c_text = bodycomp->c_text;
 304                 bodycomp->c_text = tmpbuf;
 305         }
 306
 307         if (size)
 308                 dat[2] = size;
 309         else if (outnum > 0) {
 310                 dat[2] = ftell(scnout);
 311                 if (dat[2] == EOF)
 312                         DIEWRERR();
 313         }
 314
 315         if ((datecomp && !datecomp->c_text) || (!size && !outnum)) {
 316                 struct stat st;
 317
 318                 fstat(fileno(inb), &st);
 319                 if (!size && !outnum)
 320                         dat[2] = st.st_size;
 321                 if (datecomp) {
 322                         if (! datecomp->c_text) {
 323                                 if (datecomp->c_tws == NULL)
 324                                         datecomp->c_tws = (struct tws *) calloc((size_t) 1, sizeof(*datecomp->c_tws));
 325                                 if (datecomp->c_tws == NULL)
 326                                         adios(NULL, "unable to allocate tws buffer");
 327                                 *datecomp->c_tws = *dlocaltime((time_t *) &st.st_mtime);
 328                                 datecomp->c_flags |= CF_DATEFAB|CF_TRUE;
 329                         } else {
 330                                 datecomp->c_flags &= ~CF_DATEFAB;
 331                         }
 332                 }
 333         }
 334
 335         fmt_scan(fmt, scanl, slwidth, dat);
 336
 337         if (bodycomp)
 338                 bodycomp->c_text = saved_c_text;
 339
 340         if (noisy)
 341                 fputs(scanl, stdout);
 342
 343         /* return dynamically allocated buffers to pool */
 344         while ((cptr = *savecomp++)) {
 345                 *--nxtbuf = cptr->c_text;
 346                 cptr->c_text = NULL;
 347         }
 348         *--nxtbuf = tmpbuf;
 349
 350         if (outnum && (ferror(scnout) || fclose(scnout) == EOF))
 351                 DIEWRERR();
 352
 353         return (state != FILEEOF ? SCNERR : SCNMSG);
 354 }
 355
 356 static int
 357 mh_fputs(char *s, FILE *stream)
 358 {
 359         char c;
 360
 361         while ((c = *s++))
 362                 if (putc(c,stream) == EOF )
 363                         return(EOF);
 364         return (0);
 365 }