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 = free_field;
  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 = (char *) mh_xmalloc((size_t) SCAN_CHARWIDTH *
  78                                         (slwidth + 2));  /* probably for \n and \0 */
  79                         /* Compile format string */
  80                         ncomps = fmt_compile(fmtstr, &fmt) + 1;
  81                         FINDCOMP(datecomp, "date");
  82                 } else {
  83                         ncomps = 1;
  84                         datecomp = NULL;
  85                 }
  86         }
  87
  88         if (feof(inb)) {
  89                 return SCNEOF;
  90         }
  91
  92         /*
  93         ** each-message initialization
  94         */
  95         dat[0] = innum ? innum : outnum;
  96         dat[1] = curflg;
  97         dat[4] = unseen;
  98         fpos = ftell(inb);
  99
 100         if (incing) {
 101                 scnmsg = m_name(outnum);
 102                 if (*scnmsg == '?')  /* msg num out of range */
 103                         return SCNNUM;
 104                 if (!(scnout = fopen(scnmsg, "w")))
 105                         adios(EX_IOERR, scnmsg, "unable to write");
 106         }
 107         /* scan - main loop */
 108         for (compnum = 1, state = FLD2; ; ) {
 109                 state = m_getfld2(state, &f, inb);
 110                 switch (state) {
 111                 case FLD2:
 112                         compnum++;
 113                         if (incing) {
 114                                 FPUTS(f.name);
 115                                 FPUTS(":");
 116                                 FPUTS(f.value);
 117                         }
 118                         if (fmtstr && (cptr = wantcomp[CHASH(f.name)])) {
 119                                 /*
 120                                 ** we're interested in this component,
 121                                 ** but find the right one in the hash
 122                                 ** collision chain ...
 123                                 */
 124                                 do {
 125                                         if (mh_strcasecmp(f.name, cptr->c_name)!=0) {
 126                                                 continue;
 127                                         }
 128                                         if (cptr->c_text) {
 129                                                 free(cptr->c_text);
 130                                                 cptr->c_text = NULL;
 131                                         }
 132                                         cptr->c_text = getcpy(f.value);
 133                                         cp = cptr->c_text + strlen(cptr->c_text) - 1;
 134                                         for (; cp >= cptr->c_text; cp--) {
 135                                                 if (isspace(*cp)) {
 136                                                         *cp = '\0';
 137                                                 } else {
 138                                                         break;
 139                                                 }
 140                                         }
 141                                         break;
 142                                 } while ((cptr = cptr->c_next));
 143                         }
 144                         break;
 145
 146                 case BODY2:
 147                         compnum = -1;
 148                         if (scanfolder) {
 149                                 /* stop here if we scan a msg in a folder */
 150                                 state = FILEEOF2;
 151                                 goto finished;
 152                         }
 153                         /* otherwise (mbox): snarf the body */
 154                         if (strncmp("From ", f.value, 5)==0) {
 155                                 state = FILEEOF2;
 156                                 goto finished;
 157                         }
 158                         if (incing) {
 159                                 FPUTS("\n");
 160                                 FPUTS(f.value);
 161                         }
 162 body:;
 163                         blankline = 0;
 164                         while ((state = m_getfld2(state, &f, inb)) == BODY2) {
 165                                 /*
 166                                 ** recognize From lines without blank lines
 167                                 ** before them as well.
 168                                 */
 169                                 if (strncmp("From ", f.value, 5)==0) {
 170                                         state = FILEEOF2;
 171                                         goto finished;
 172                                 }
 173                                 /*
 174                                 ** delay the printing of blank lines
 175                                 ** because if it's the end of the message,
 176                                 ** then we must omit the blank line,
 177                                 ** as it is not part of the message but
 178                                 ** part of the mbox format
 179                                 */
 180                                 if (blankline) {
 181                                         /* print the delayed blank line */
 182                                         FPUTS("\n");
 183                                         blankline = 0;
 184                                 }
 185                                 if (strcmp(f.value, "\n")==0) {
 186                                         blankline = 1;
 187                                         continue;
 188                                 }
 189                                 if (incing) {
 190                                         FPUTS(f.value);
 191                                 }
 192                         }
 193                         goto finished;
 194
 195                 case LENERR2:
 196                         advise(NULL, "line \"%s\" too long", trim(f.value));
 197                         goto handleerror;
 198
 199                 case FMTERR2:
 200                         if (strncmp("From ", f.value, 5)==0) {
 201                                 state = FILEEOF2;
 202                                 goto finished;
 203                         }
 204                         /* FALL */
 205
 206                 case IOERR2:
 207 handleerror:;
 208                         fprintf(stderr, innum ?
 209                                         "??Format error (message %d) in " :
 210                                         "??Format error in ",
 211                                         outnum ? outnum : innum);
 212                         fprintf(stderr, "component %d\n", compnum);
 213
 214                         if (incing) {
 215                                 FPUTS("\n\nBAD MSG:\n");
 216                                 FPUTS(f.name);  /* XXX use f.field? */
 217                                 FPUTS("\n");
 218                                 state = BODY2;
 219                                 goto body;
 220                         }
 221                         /* fall through if we scan only */
 222
 223                 case FILEEOF2:
 224                         goto finished;
 225
 226                 default:
 227                         adios(EX_SOFTWARE, NULL, "getfld() returned %d", state);
 228                 }
 229         }
 230
 231 finished:
 232         /* Format and output the scan line. */
 233         if (ferror(inb)) {
 234                 advise("read", "unable to");
 235                 return SCNFAT;
 236         }
 237
 238         if (incing) {
 239                 if ((dat[2] = ftell(scnout)) == EOF)
 240                         adios(EX_IOERR, scnmsg, "write error on");
 241         } else if (!scanfolder) {
 242                 if ((dat[2] = ftell(inb)) == EOF)
 243                         adios(EX_IOERR, scnmsg, "write error on");
 244                 dat[2] -= fpos;
 245         }
 246
 247         if (fmtstr) {
 248                 fstat(fileno(inb), &st);
 249                 if (scanfolder) {
 250                         dat[2] = st.st_size;
 251                 }
 252                 if (datecomp && !datecomp->c_text) {
 253                         if (!datecomp->c_text) {
 254                                 if (!datecomp->c_tws)
 255                                         datecomp->c_tws = (struct tws *) mh_xcalloc((size_t) 1, sizeof(*datecomp->c_tws));
 256                                 if (!datecomp->c_tws)
 257                                         adios(EX_OSERR, NULL, "unable to allocate tws buffer");
 258                                 *datecomp->c_tws = *dlocaltime((time_t *) &st.st_mtime);
 259                                 datecomp->c_flags |= CF_DATEFAB|CF_TRUE;
 260                         } else {
 261                                 datecomp->c_flags &= ~CF_DATEFAB;
 262                         }
 263                 }
 264
 265                 /* print the scan line */
 266                 fmt_scan(fmt, scanl, slwidth, dat);
 267                 fputs(scanl, stdout);
 268         }
 269
 270         /* clean up old values */
 271         for (i=0; i < sizeof(wantcomp)/sizeof(wantcomp[0]); i++) {
 272                 for (cptr=wantcomp[i]; cptr; cptr=cptr->c_next) {
 273                         if (cptr->c_text) {
 274                                 free(cptr->c_text);
 275                                 cptr->c_text = NULL;
 276                         }
 277                 }
 278         }
 279
 280         if (incing && (ferror(scnout) || fclose(scnout) == EOF))
 281                 adios(EX_IOERR, scnmsg, "write error on");
 282
 283         return (state == FILEEOF2 ? SCNMSG : SCNERR);
 284 }