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  * static prototypes
  41  */
  42 static int process (char *, int);
  43
  44
  45 int
  46 main (int argc, char **argv)
  47 {
  48     int datep = 0, width = 0, status = 0;
  49     char *cp, *form = NULL, *format = NULL, *nfs;
  50     char buf[BUFSIZ], **argp, **arguments;
  51     char *dates[NDATES];
  52
  53 #ifdef LOCALE
  54     setlocale(LC_ALL, "");
  55 #endif
  56     invo_name = r1bindex (argv[0], '/');
  57
  58     /* read user profile/context */
  59     context_read();
  60
  61     arguments = getarguments (invo_name, argc, argv, 1);
  62     argp = arguments;
  63
  64     while ((cp = *argp++)) {
  65         if (*cp == '-') {
  66             switch (smatch (++cp, switches)) {
  67                 case AMBIGSW:
  68                     ambigsw (cp, switches);
  69                     done (1);
  70                 case UNKWNSW:
  71                     adios (NULL, "-%s unknown", cp);
  72
  73                 case HELPSW:
  74                     snprintf (buf, sizeof(buf), "%s [switches] dates ...",
  75                         invo_name);
  76                     print_help (buf, switches, 1);
  77                     done (1);
  78                 case VERSIONSW:
  79                     print_version(invo_name);
  80                     done (1);
  81
  82                 case FORMSW:
  83                     if (!(form = *argp++) || *form == '-')
  84                         adios (NULL, "missing argument to %s", argp[-2]);
  85                     format = NULL;
  86                     continue;
  87                 case FMTSW:
  88                     if (!(format = *argp++) || *format == '-')
  89                         adios (NULL, "missing argument to %s", argp[-2]);
  90                     form = NULL;
  91                     continue;
  92
  93                 case WIDTHSW:
  94                     if (!(cp = *argp++) || *cp == '-')
  95                         adios (NULL, "missing argument to %s", argp[-2]);
  96                     width = atoi (cp);
  97                     continue;
  98             }
  99         }
 100         if (datep > NDATES)
 101             adios (NULL, "more than %d dates", NDATES);
 102         else
 103             dates[datep++] = cp;
 104     }
 105     dates[datep] = NULL;
 106
 107     if (datep == 0)
 108         adios (NULL, "usage: %s [switches] dates ...", invo_name);
 109
 110     /* get new format string */
 111     nfs = new_fs (form, format, FORMAT);
 112
 113     if (width == 0) {
 114         if ((width = sc_width ()) < WIDTH / 2)
 115             width = WIDTH / 2;
 116         width -= 2;
 117     }
 118     if (width > WBUFSIZ)
 119         width = WBUFSIZ;
 120     fmt_compile (nfs, &fmt);
 121
 122     dat[0] = 0;
 123     dat[1] = 0;
 124     dat[2] = 0;
 125     dat[3] = width;
 126     dat[4] = 0;
 127
 128     for (datep = 0; dates[datep]; datep++)
 129         status += process (dates[datep], width);
 130
 131     context_save ();    /* save the context file */
 132     done (status);
 133     return 1;
 134 }
 135
 136
 137 static int
 138 process (char *date, int length)
 139 {
 140     int status = 0;
 141     char buffer[WBUFSIZ + 1];
 142     register struct comp *cptr;
 143
 144     FINDCOMP (cptr, "text");
 145     if (cptr)
 146         cptr->c_text = date;
 147     fmt_scan (fmt, buffer, length, dat);
 148     fputs (buffer, stdout);
 149
 150     return status;
 151 }