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 #define DP_SWITCHES \
  22     X("form formatfile", 0, FORMSW) \
  23     X("format string", 5, FMTSW) \
  24     X("width columns", 0, WIDTHSW) \
  25     X("version", 0, VERSIONSW) \
  26     X("help", 0, HELPSW) \
  27
  28 #define X(sw, minchars, id) id,
  29 DEFINE_SWITCH_ENUM(DP);
  30 #undef X
  31
  32 #define X(sw, minchars, id) { sw, minchars, id },
  33 DEFINE_SWITCH_ARRAY(DP, switches);
  34 #undef X
  35
  36 static struct format *fmt;
  37
  38 static int dat[5];
  39
  40 /*
  41  * static prototypes
  42  */
  43 static int process (char *, int);
  44
  45
  46 int
  47 main (int argc, char **argv)
  48 {
  49     int datep = 0, width = 0, status = 0;
  50     char *cp, *form = NULL, *format = NULL, *nfs;
  51     char buf[BUFSIZ], **argp, **arguments;
  52     char *dates[NDATES];
  53
  54     setlocale(LC_ALL, "");
  55     invo_name = r1bindex (argv[0], '/');
  56
  57     /* read user profile/context */
  58     context_read();
  59
  60     arguments = getarguments (invo_name, argc, argv, 1);
  61     argp = arguments;
  62
  63     while ((cp = *argp++)) {
  64         if (*cp == '-') {
  65             switch (smatch (++cp, switches)) {
  66                 case AMBIGSW:
  67                     ambigsw (cp, switches);
  68                     done (1);
  69                 case UNKWNSW:
  70                     adios (NULL, "-%s unknown", cp);
  71
  72                 case HELPSW:
  73                     snprintf (buf, sizeof(buf), "%s [switches] dates ...",
  74                         invo_name);
  75                     print_help (buf, switches, 1);
  76                     done (0);
  77                 case VERSIONSW:
  78                     print_version(invo_name);
  79                     done (0);
  80
  81                 case FORMSW:
  82                     if (!(form = *argp++) || *form == '-')
  83                         adios (NULL, "missing argument to %s", argp[-2]);
  84                     format = NULL;
  85                     continue;
  86                 case FMTSW:
  87                     if (!(format = *argp++) || *format == '-')
  88                         adios (NULL, "missing argument to %s", argp[-2]);
  89                     form = NULL;
  90                     continue;
  91
  92                 case WIDTHSW:
  93                     if (!(cp = *argp++) || *cp == '-')
  94                         adios (NULL, "missing argument to %s", argp[-2]);
  95                     width = atoi (cp);
  96                     continue;
  97             }
  98         }
  99         if (datep > NDATES)
 100             adios (NULL, "more than %d dates", NDATES);
 101         else
 102             dates[datep++] = cp;
 103     }
 104     dates[datep] = NULL;
 105
 106     if (datep == 0)
 107         adios (NULL, "usage: %s [switches] dates ...", invo_name);
 108
 109     /* get new format string */
 110     nfs = new_fs (form, format, FORMAT);
 111
 112     if (width == 0) {
 113         if ((width = sc_width ()) < WIDTH / 2)
 114             width = WIDTH / 2;
 115         width -= 2;
 116     }
 117     if (width > WBUFSIZ)
 118         width = WBUFSIZ;
 119     fmt_compile (nfs, &fmt, 1);
 120
 121     dat[0] = 0;
 122     dat[1] = 0;
 123     dat[2] = 0;
 124     dat[3] = width;
 125     dat[4] = 0;
 126
 127     for (datep = 0; dates[datep]; datep++)
 128         status += process (dates[datep], width);
 129
 130     context_save ();    /* save the context file */
 131     fmt_free (fmt, 1);
 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     cptr = fmt_findcomp ("text");
 145     if (cptr) {
 146         if (cptr->c_text)
 147             free(cptr->c_text);
 148         cptr->c_text = getcpy(date);
 149     }
 150     fmt_scan (fmt, buffer, sizeof buffer - 1, length, dat, NULL);
 151     fputs (buffer, stdout);
 152
 153     return status;
 154 }