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.
  34 */
  35 #define SBUFSIZ 512
  36
  37 static struct format *fmt;
  38
  39 static struct comp *datecomp;  /* pntr to "date" comp */
  40 static int ncomps = 0;  /* # of interesting components */
  41 static char **compbuffers = NULL;  /* buffers for component text */
  42 static struct comp **used_buf = NULL;  /* stack for comp that use buffers */
  43
  44 static int dat[5];  /* aux. data for format routine */
  45
  46 char *scanl = NULL;  /* text of most recent scanline */
  47
  48 #define FPUTS(buf) {\
  49                 if (fputs(buf, scnout) == EOF)\
  50                         adios(scnmsg, "write error on");\
  51         }
  52
  53 /*
  54 ** prototypes
  55 */
  56 int sc_width(void);  /* from termsbr.c */
  57
  58 #ifdef MULTIBYTE_SUPPORT
  59 #define SCAN_CHARWIDTH MB_CUR_MAX
  60 #else
  61 #define SCAN_CHARWIDTH 1
  62 #endif
  63
  64 int
  65 scan(FILE *inb, int innum, int outnum, char *fmtstr, int width, int curflg,
  66         int unseen)
  67 {
  68         static int slwidth;
  69         int i, compnum, state;
  70         unsigned char *cp, *tmpbuf;
  71         char **nxtbuf;
  72         struct comp *cptr;
  73         struct comp **savecomp;
  74         char *scnmsg = NULL;
  75         FILE *scnout = NULL;
  76         char name[NAMESZ];
  77         char returnpath[BUFSIZ];
  78         char deliverydate[BUFSIZ];
  79         int incing = (outnum != SCN_MBOX && outnum != SCN_FOLD);
  80         int scanfolder = (outnum == SCN_FOLD);
  81         long fpos;
  82         struct stat st;
  83
  84         /* first-time only initialization */
  85         if (!scanl) {
  86                 if (incing)
  87                         umask(~m_gmprot());
  88
  89                 if (fmtstr) {
  90                         if (width == 0) {
  91                                 if ((width = sc_width()) < WIDTH/2)
  92                                         width = WIDTH/2;
  93                                 else if (width > MAXSCANL)
  94                                         width = MAXSCANL;
  95                         }
  96                         dat[3] = slwidth = width;
  97                         scanl = (char *) mh_xmalloc((size_t) SCAN_CHARWIDTH *
  98                                         (slwidth + 2));  /* probably for \n and \0 */
  99                         /* Compile format string */
 100                         ncomps = fmt_compile(fmtstr, &fmt) + 1;
 101                         FINDCOMP(datecomp, "date");
 102                 } else {
 103                         ncomps = 1;
 104                         datecomp = NULL;
 105                 }
 106
 107                 nxtbuf = compbuffers = (char **) calloc((size_t) ncomps,
 108                                 sizeof(char *));
 109                 if (!nxtbuf)
 110                         adios(NULL, "unable to allocate component buffers");
 111                 used_buf = (struct comp **) calloc((size_t) (ncomps+1),
 112                                 sizeof(struct comp *));
 113                 if (!used_buf)
 114                         adios(NULL, "unable to allocate component buffer stack");
 115                 /* NULL-terminate array */
 116                 used_buf += ncomps;
 117                 *used_buf = NULL;
 118                 /* allocate space for the items */
 119                 for (i = ncomps; i--; )
 120                         *nxtbuf++ = mh_xmalloc(SBUFSIZ);
 121         }
 122
 123         /*
 124         ** each-message initialization
 125         */
 126         nxtbuf = compbuffers;
 127         savecomp = used_buf;
 128         tmpbuf = *nxtbuf++;
 129         dat[0] = innum ? innum : outnum;
 130         dat[1] = curflg;
 131         dat[4] = unseen;
 132         fpos = ftell(inb);
 133
 134         /*
 135         ** Get the first field.  If the message is non-empty
 136         ** and we're doing an "inc", open the output file.
 137         */
 138         if ((state = m_getfld(FLD, name, tmpbuf, SBUFSIZ, inb)) == FILEEOF) {
 139                 if (ferror(inb)) {
 140                         advise("read", "unable to"); /* "read error" */
 141                         return SCNFAT;
 142                 } else {
 143                         return SCNEOF;
 144                 }
 145         }
 146
 147         if (incing) {
 148                 scnmsg = m_name(outnum);
 149                 if (*scnmsg == '?')  /* msg num out of range */
 150                         return SCNNUM;
 151                 if (!(scnout = fopen(scnmsg, "w")))
 152                         adios(scnmsg, "unable to write");
 153                 /*
 154                 ** Add the Return-Path and Delivery-Date
 155                 ** header fields to message.
 156                 */
 157                 if (get_returnpath(returnpath, sizeof(returnpath),
 158                                 deliverydate, sizeof(deliverydate))) {
 159                         FPUTS("Return-Path: ");
 160                         FPUTS(returnpath);
 161                         FPUTS("Delivery-Date: ");
 162                         FPUTS(deliverydate);
 163                 }
 164         }
 165
 166         /* scan - main loop */
 167         for (compnum = 1; ;
 168                         state = m_getfld(state, name, tmpbuf, SBUFSIZ, inb)) {
 169                 switch (state) {
 170                 case FLD:
 171                 case FLDPLUS:
 172                         compnum++;
 173                         if (incing) {
 174                                 FPUTS(name);
 175                                 FPUTS(":");
 176                                 FPUTS(tmpbuf);
 177                         }
 178                         /*
 179                         ** if we're interested in this component, save
 180                         ** a pointer to the component text, then start
 181                         ** using our next free buffer as the component
 182                         ** temp buffer (buffer switching saves an extra
 183                         ** copy of the component text).
 184                         */
 185                         if (fmtstr && (cptr = wantcomp[CHASH(name)])) {
 186                                 do {
 187                                         if (mh_strcasecmp(name, cptr->c_name)!=0) {
 188                                                 continue;
 189                                         }
 190                                         if (!cptr->c_text) {
 191                                                 cptr->c_text = tmpbuf;
 192                                                 cp = tmpbuf+strlen(tmpbuf)-1;
 193                                                 for (; cp >= tmpbuf; cp--) {
 194                                                         if (isspace(*cp))
 195                                                                 *cp = '\0';
 196                                                         else
 197                                                                 break;
 198                                                 }
 199                                                 *--savecomp = cptr;
 200                                                 tmpbuf = *nxtbuf++;
 201                                         }
 202                                         break;
 203                                 } while ((cptr = cptr->c_next));
 204                         }
 205
 206                         while (state == FLDPLUS) {
 207                                 state = m_getfld(state, name, tmpbuf, SBUFSIZ,
 208                                                 inb);
 209                                 if (incing)
 210                                         FPUTS(tmpbuf);
 211                         }
 212                         break;
 213
 214                 case BODY:
 215                         compnum = -1;
 216                         if (scanfolder) {
 217                                 /* stop here if we scan a msg in a folder */
 218                                 state = FILEEOF;
 219                                 goto finished;
 220                         }
 221                         /* otherwise (mbox): snarf the body */
 222                         if (incing) {
 223                                 FPUTS("\n");
 224                                 FPUTS(tmpbuf);
 225                         }
 226 body:;
 227                         while (state == BODY) {
 228                                 state = m_getfld(state, name, tmpbuf, SBUFSIZ,
 229                                                 inb);
 230                                 if (incing) {
 231                                         FPUTS(tmpbuf);
 232                                 }
 233                         }
 234                         goto finished;
 235
 236                 case LENERR:
 237                 case FMTERR:
 238                         fprintf(stderr, innum ? "??Format error (message %d) in " : "??Format error in ", outnum ? outnum : innum);
 239                         fprintf(stderr, "component %d\n", compnum);
 240
 241                         if (incing) {
 242                                 FPUTS("\n\nBAD MSG:\n");
 243                                 FPUTS(name);
 244                                 FPUTS("\n");
 245                                 state = BODY;
 246                                 goto body;
 247                         }
 248                         /* fall through if we scan only */
 249
 250                 case FILEEOF:
 251                         goto finished;
 252
 253                 default:
 254                         adios(NULL, "getfld() returned %d", state);
 255                 }
 256         }
 257
 258 finished:
 259
 260         /* Format and output the scan line. */
 261         if (ferror(inb)) {
 262                 advise("read", "unable to");
 263                 return SCNFAT;
 264         }
 265
 266         if (incing) {
 267                 if ((dat[2] = ftell(scnout)) == EOF)
 268                         adios(scnmsg, "write error on");
 269         } else if (!scanfolder) {
 270                 if ((dat[2] = ftell(inb)) == EOF)
 271                         adios(scnmsg, "write error on");
 272                 dat[2] -= fpos;
 273         }
 274
 275         if (fmtstr) {
 276                 fstat(fileno(inb), &st);
 277                 if (scanfolder) {
 278                         dat[2] = st.st_size;
 279                 }
 280                 if (datecomp && !datecomp->c_text) {
 281                         if (!datecomp->c_text) {
 282                                 if (!datecomp->c_tws)
 283                                         datecomp->c_tws = (struct tws *) calloc((size_t) 1, sizeof(*datecomp->c_tws));
 284                                 if (!datecomp->c_tws)
 285                                         adios(NULL, "unable to allocate tws buffer");
 286                                 *datecomp->c_tws = *dlocaltime((time_t *) &st.st_mtime);
 287                                 datecomp->c_flags |= CF_DATEFAB|CF_TRUE;
 288                         } else {
 289                                 datecomp->c_flags &= ~CF_DATEFAB;
 290                         }
 291                 }
 292
 293                 /* print the scan line */
 294                 fmt_scan(fmt, scanl, slwidth, dat);
 295                 fputs(scanl, stdout);
 296         }
 297
 298         /* return dynamically allocated buffers to pool */
 299         while ((cptr = *savecomp++)) {
 300                 *--nxtbuf = cptr->c_text;
 301                 cptr->c_text = NULL;
 302         }
 303         *--nxtbuf = tmpbuf;
 304
 305         if (incing && (ferror(scnout) || fclose(scnout) == EOF))
 306                 adios(scnmsg, "write error on");
 307
 308         return (state != FILEEOF ? SCNERR : SCNMSG);
 309 }