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 #include <ctype.h>
  16 #include <sys/stat.h>
  17 #include <sysexits.h>
  18
  19 #define MAXSCANL 256  /* longest possible scan line */
  20
  21 static struct format *fmt;
  22
  23 static struct comp *datecomp;  /* pntr to "date" comp */
  24 static int ncomps = 0;  /* # of interesting components */
  25
  26 static int dat[5];  /* aux. data for format routine */
  27
  28 char *scanl = NULL;  /* text of most recent scanline */
  29
  30 #define FPUTS(buf) {\
  31                 if (fputs(buf, scnout) == EOF)\
  32                         adios(EX_IOERR, scnmsg, "write error on");\
  33         }
  34
  35 /*
  36 ** prototypes
  37 */
  38 int sc_width(void);  /* from termsbr.c */
  39
  40 #ifdef MULTIBYTE_SUPPORT
  41 #define SCAN_CHARWIDTH MB_CUR_MAX
  42 #else
  43 #define SCAN_CHARWIDTH 1
  44 #endif
  45
  46 int
  47 scan(FILE *inb, int innum, int outnum, char *fmtstr, int width, int curflg,
  48         int unseen)
  49 {
  50         static int slwidth;
  51         int compnum, i;
  52         enum state state;
  53         struct field f = {{0}};
  54         char *cp;
  55         struct comp *cptr;
  56         char *scnmsg = NULL;
  57         FILE *scnout = NULL;
  58         int incing = (outnum != SCN_MBOX && outnum != SCN_FOLD);
  59         int scanfolder = (outnum == SCN_FOLD);
  60         long fpos;
  61         struct stat st;
  62         int blankline;
  63
  64         /* first-time only initialization */
  65         if (!scanl) {
  66                 if (incing)
  67                         umask(~m_gmprot());
  68
  69                 if (fmtstr) {
  70                         if (width == 0) {
  71                                 if ((width = sc_width()) < WIDTH/2)
  72                                         width = WIDTH/2;
  73                                 else if (width > MAXSCANL)
  74                                         width = MAXSCANL;
  75                         }
  76                         dat[3] = slwidth = width;
  77                         scanl = mh_xcalloc(slwidth + 2, SCAN_CHARWIDTH);  /* probably for \n and \0 */
  78                         /* Compile format string */
  79                         ncomps = fmt_compile(fmtstr, &fmt) + 1;
  80                         FINDCOMP(datecomp, "date");
  81                 } else {
  82                         ncomps = 1;
  83                         datecomp = NULL;
  84                 }
  85         }
  86
  87         if (feof(inb)) {
  88                 return SCNEOF;
  89         }
  90
  91         /*
  92         ** each-message initialization
  93         */
  94         dat[0] = innum ? innum : outnum;
  95         dat[1] = curflg;
  96         dat[4] = unseen;
  97         fpos = ftell(inb);
  98
  99         if (incing) {
 100                 scnmsg = m_name(outnum);
 101                 if (*scnmsg == '?')  /* msg num out of range */
 102                         return SCNNUM;
 103                 if (!(scnout = fopen(scnmsg, "w")))
 104                         adios(EX_IOERR, scnmsg, "unable to write");
 105         }
 106         /* scan - main loop */
 107         for (compnum = 1, state = FLD2; ; ) {
 108                 state = m_getfld2(state, &f, inb);
 109                 switch (state) {
 110                 case LENERR2:
 111                         state = FLD2;
 112                         /* FALL */
 113                 case FLD2:
 114                         compnum++;
 115                         if (incing) {
 116                                 FPUTS(f.name);
 117                                 FPUTS(":");
 118                                 FPUTS(f.value);
 119                         }
 120                         if (fmtstr && (cptr = wantcomp[CHASH(f.name)])) {
 121                                 /*
 122                                 ** we're interested in this component,
 123                                 ** but find the right one in the hash
 124                                 ** collision chain ...
 125                                 */
 126                                 do {
 127                                         if (mh_strcasecmp(f.name, cptr->c_name)!=0) {
 128                                                 continue;
 129                                         }
 130                                         if (cptr->c_text) {
 131                                                 free(cptr->c_text);
 132                                                 cptr->c_text = NULL;
 133                                         }
 134                                         cptr->c_text = mh_xstrdup(f.value);
 135                                         cp = cptr->c_text + strlen(cptr->c_text) - 1;
 136                                         for (; cp >= cptr->c_text; cp--) {
 137                                                 if (isspace(*cp)) {
 138                                                         *cp = '\0';
 139                                                 } else {
 140                                                         break;
 141                                                 }
 142                                         }
 143                                         break;
 144                                 } while ((cptr = cptr->c_next));
 145                         }
 146                         break;
 147
 148                 case BODY2:
 149                         compnum = -1;
 150                         if (scanfolder) {
 151                                 /* stop here if we scan a msg in a folder */
 152                                 state = FILEEOF2;
 153                                 goto finished;
 154                         }
 155                         /* otherwise (mbox): snarf the body */
 156                         if (strncmp("From ", f.value, 5)==0) {
 157                                 state = FILEEOF2;
 158                                 goto finished;
 159                         }
 160                         if (incing) {
 161                                 FPUTS("\n");
 162                                 FPUTS(f.value);
 163                         }
 164 body:;
 165                         blankline = 0;
 166                         while ((state = m_getfld2(state, &f, inb)) == BODY2) {
 167                                 /*
 168                                 ** recognize From lines without blank lines
 169                                 ** before them as well.
 170                                 */
 171                                 if (strncmp("From ", f.value, 5)==0) {
 172                                         state = FILEEOF2;
 173                                         goto finished;
 174                                 }
 175                                 /*
 176                                 ** delay the printing of blank lines
 177                                 ** because if it's the end of the message,
 178                                 ** then we must omit the blank line,
 179                                 ** as it is not part of the message but
 180                                 ** part of the mbox format
 181                                 */
 182                                 if (blankline) {
 183                                         /* print the delayed blank line */
 184                                         FPUTS("\n");
 185                                         blankline = 0;
 186                                 }
 187                                 if (strcmp(f.value, "\n")==0) {
 188                                         blankline = 1;
 189                                         continue;
 190                                 }
 191                                 if (incing) {
 192                                         FPUTS(f.value);
 193                                 }
 194                         }
 195                         goto finished;
 196
 197                 case FMTERR2:
 198                         if (strncmp("From ", f.value, 5)==0) {
 199                                 state = FILEEOF2;
 200                                 goto finished;
 201                         }
 202                         state = FLD2;
 203                         fprintf(stderr, innum ?
 204                                         "??Format error (message %d) in " :
 205                                         "??Format error in ",
 206                                         outnum ? outnum : innum);
 207                         fprintf(stderr, "component %d\n", compnum);
 208                         continue;
 209
 210                 case IOERR2:
 211                         fprintf(stderr, innum ?
 212                                         "??Format error (message %d) in " :
 213                                         "??Format error in ",
 214                                         outnum ? outnum : innum);
 215                         fprintf(stderr, "component %d\n", compnum);
 216
 217                         if (incing) {
 218                                 FPUTS("\n\nBAD MSG:\n");
 219                                 FPUTS(f.name);  /* XXX use f.field? */
 220                                 FPUTS("\n");
 221                                 state = BODY2;
 222                                 goto body;
 223                         }
 224                         /* fall through if we scan only */
 225
 226                 case FILEEOF2:
 227                         goto finished;
 228
 229                 default:
 230                         adios(EX_SOFTWARE, NULL, "getfld() returned %d", state);
 231                 }
 232         }
 233
 234 finished:
 235         /* Format and output the scan line. */
 236         if (ferror(inb)) {
 237                 advise("read", "unable to");
 238                 return SCNFAT;
 239         }
 240
 241         if (incing) {
 242                 if ((dat[2] = ftell(scnout)) == EOF)
 243                         adios(EX_IOERR, scnmsg, "write error on");
 244         } else if (!scanfolder) {
 245                 if ((dat[2] = ftell(inb)) == EOF)
 246                         adios(EX_IOERR, scnmsg, "write error on");
 247                 dat[2] -= fpos;
 248         }
 249
 250         if (fmtstr) {
 251                 fstat(fileno(inb), &st);
 252                 if (scanfolder) {
 253                         dat[2] = st.st_size;
 254                 }
 255                 if (datecomp && !datecomp->c_text) {
 256                         if (!datecomp->c_text) {
 257                                 if (!datecomp->c_tws)
 258                                         datecomp->c_tws = mh_xcalloc(1, sizeof(*datecomp->c_tws));
 259                                 if (!datecomp->c_tws)
 260                                         adios(EX_OSERR, NULL, "unable to allocate tws buffer");
 261                                 *datecomp->c_tws = *dlocaltime((time_t *) &st.st_mtime);
 262                                 datecomp->c_flags |= CF_DATEFAB|CF_TRUE;
 263                         } else {
 264                                 datecomp->c_flags &= ~CF_DATEFAB;
 265                         }
 266                 }
 267
 268                 /* print the scan line */
 269                 fmt_scan(fmt, scanl, slwidth, dat);
 270                 fputs(scanl, stdout);
 271         }
 272
 273         /* clean up old values */
 274         for (i=0; i < sizeof(wantcomp)/sizeof(wantcomp[0]); i++) {
 275                 for (cptr=wantcomp[i]; cptr; cptr=cptr->c_next) {
 276                         if (cptr->c_text) {
 277                                 free(cptr->c_text);
 278                                 cptr->c_text = NULL;
 279                         }
 280                 }
 281         }
 282
 283         if (incing && (ferror(scnout) || fclose(scnout) == EOF))
 284                 adios(EX_IOERR, scnmsg, "write error on");
 285
 286         return (state == FILEEOF2 ? SCNMSG : SCNERR);
 287 }