diplodocus.org Git - nmh/blob - uip/dp.c

   1
   2 /*
   3  * dp.c -- parse dates 822-style
   4  *
   5  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #include <h/mh.h>
  11 #include <h/fmt_scan.h>
  12 #include <h/tws.h>
  13
  14 #define NDATES 100
  15
  16 #define WIDTH 78
  17 #define WBUFSIZ BUFSIZ
  18
  19 #define FORMAT "%<(nodate{text})error: %{text}%|%(putstr(pretty{text}))%>"
  20
  21 static struct swit switches[] = {
  22 #define FORMSW                0
  23     { "form formatfile", 0 },
  24 #define FMTSW                 1
  25     { "format string", 5 },
  26 #define WIDTHSW               2
  27     { "width columns", 0 },
  28 #define VERSIONSW             3
  29     { "version", 0 },
  30 #define HELPSW                4
  31     { "help", 0 },
  32     { NULL, 0 }
  33 };
  34
  35 static struct format *fmt;
  36
  37 static int dat[5];
  38
  39 /*
  40  * prototypes
  41  */
  42 int sc_width (void);  /* from termsbr.c */
  43
  44 /*
  45  * static prototypes
  46  */
  47 static int process (char *, int);
  48
  49
  50 int
  51 main (int argc, char **argv)
  52 {
  53     int datep = 0, width = 0, status = 0;
  54     char *cp, *form = NULL, *format = NULL, *nfs;
  55     char buf[BUFSIZ], **argp, **arguments;
  56     char *dates[NDATES];
  57
  58 #ifdef LOCALE
  59     setlocale(LC_ALL, "");
  60 #endif
  61     invo_name = r1bindex (argv[0], '/');
  62
  63     /* read user profile/context */
  64     context_read();
  65
  66     arguments = getarguments (invo_name, argc, argv, 1);
  67     argp = arguments;
  68
  69     while ((cp = *argp++)) {
  70         if (*cp == '-') {
  71             switch (smatch (++cp, switches)) {
  72                 case AMBIGSW:
  73                     ambigsw (cp, switches);
  74                     done (1);
  75                 case UNKWNSW:
  76                     adios (NULL, "-%s unknown", cp);
  77
  78                 case HELPSW:
  79                     snprintf (buf, sizeof(buf), "%s [switches] dates ...",
  80                         invo_name);
  81                     print_help (buf, switches, 1);
  82                     done (1);
  83                 case VERSIONSW:
  84                     print_version(invo_name);
  85                     done (1);
  86
  87                 case FORMSW:
  88                     if (!(form = *argp++) || *form == '-')
  89                         adios (NULL, "missing argument to %s", argp[-2]);
  90                     format = NULL;
  91                     continue;
  92                 case FMTSW:
  93                     if (!(format = *argp++) || *format == '-')
  94                         adios (NULL, "missing argument to %s", argp[-2]);
  95                     form = NULL;
  96                     continue;
  97
  98                 case WIDTHSW:
  99                     if (!(cp = *argp++) || *cp == '-')
 100                         adios (NULL, "missing argument to %s", argp[-2]);
 101                     width = atoi (cp);
 102                     continue;
 103             }
 104         }
 105         if (datep > NDATES)
 106             adios (NULL, "more than %d dates", NDATES);
 107         else
 108             dates[datep++] = cp;
 109     }
 110     dates[datep] = NULL;
 111
 112     if (datep == 0)
 113         adios (NULL, "usage: %s [switches] dates ...", invo_name);
 114
 115     /* get new format string */
 116     nfs = new_fs (form, format, FORMAT);
 117
 118     if (width == 0) {
 119         if ((width = sc_width ()) < WIDTH / 2)
 120             width = WIDTH / 2;
 121         width -= 2;
 122     }
 123     if (width > WBUFSIZ)
 124         width = WBUFSIZ;
 125     fmt_compile (nfs, &fmt);
 126
 127     dat[0] = 0;
 128     dat[1] = 0;
 129     dat[2] = 0;
 130     dat[3] = width;
 131     dat[4] = 0;
 132
 133     for (datep = 0; dates[datep]; datep++)
 134         status += process (dates[datep], width);
 135
 136     context_save ();    /* save the context file */
 137     done (status);
 138     return 1;
 139 }
 140
 141
 142 static int
 143 process (char *date, int length)
 144 {
 145     int status = 0;
 146     char buffer[WBUFSIZ + 1];
 147     register struct comp *cptr;
 148
 149     FINDCOMP (cptr, "text");
 150     if (cptr)
 151         cptr->c_text = date;
 152     fmt_scan (fmt, buffer, length, dat);
 153     fputs (buffer, stdout);
 154
 155     return status;
 156 }