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

   1 /* dp.c -- parse dates 822-style
   2  *
   3  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   4  * COPYRIGHT file in the root directory of the nmh distribution for
   5  * complete copyright information.
   6  */
   7
   8 #include <h/mh.h>
   9 #include "h/done.h"
  10 #include <h/utils.h>
  11 #include <h/fmt_scan.h>
  12 #include <h/tws.h>
  13 #include "sbr/terminal.h"
  14
  15 #define NDATES 100
  16
  17 #define WIDTH 78
  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 = -1, status = 0;
  50     char *cp, *form = NULL, *format = NULL, *nfs;
  51     char buf[BUFSIZ], **argp;
  52     char *dates[NDATES + 1]; /* Includes terminating NULL. */
  53
  54     if (nmh_init(argv[0], true, false)) { return 1; }
  55
  56     argp = getarguments (invo_name, argc, argv, 1);
  57     while ((cp = *argp++)) {
  58         if (*cp == '-') {
  59             switch (smatch (++cp, switches)) {
  60                 case AMBIGSW:
  61                     ambigsw (cp, switches);
  62                     done (1);
  63                 case UNKWNSW:
  64                     die("-%s unknown", cp);
  65
  66                 case HELPSW:
  67                     snprintf (buf, sizeof(buf), "%s [switches] dates ...",
  68                         invo_name);
  69                     print_help (buf, switches, 1);
  70                     done (0);
  71                 case VERSIONSW:
  72                     print_version(invo_name);
  73                     done (0);
  74
  75                 case FORMSW:
  76                     if (!(form = *argp++) || *form == '-')
  77                         die("missing argument to %s", argp[-2]);
  78                     format = NULL;
  79                     continue;
  80                 case FMTSW:
  81                     if (!(format = *argp++) || *format == '-')
  82                         die("missing argument to %s", argp[-2]);
  83                     form = NULL;
  84                     continue;
  85
  86                 case WIDTHSW:
  87                     if (!(cp = *argp++) || *cp == '-')
  88                         die("missing argument to %s", argp[-2]);
  89                     width = atoi (cp);
  90                     continue;
  91             }
  92         }
  93         if (datep == NDATES)
  94             die("more than %d dates", NDATES);
  95         dates[datep++] = cp;
  96     }
  97     dates[datep] = NULL;
  98
  99     if (datep == 0)
 100         die("usage: %s [switches] dates ...", invo_name);
 101
 102     /* get new format string */
 103     nfs = new_fs (form, format, FORMAT);
 104
 105     if (width == -1) {
 106         if ((width = sc_width ()) < WIDTH / 2) {
 107             /* Default:  width of the terminal, but at least WIDTH/2. */
 108             width = WIDTH / 2;
 109         }
 110         width -= 2;
 111     } else if (width == 0) {
 112         /* Unlimited width.  */
 113         width = INT_MAX;
 114     }
 115     fmt_compile (nfs, &fmt, 1);
 116
 117     dat[0] = 0;
 118     dat[1] = 0;
 119     dat[2] = 0;
 120     dat[3] = width;
 121     dat[4] = 0;
 122
 123     for (datep = 0; dates[datep]; datep++)
 124         status += process (dates[datep], width);
 125
 126     context_save ();    /* save the context file */
 127     fmt_free (fmt, 1);
 128     done(!!status);
 129     return 1;
 130 }
 131
 132
 133 static int
 134 process (char *date, int length)
 135 {
 136     int status = 0;
 137     charstring_t scanl =
 138         charstring_create (length < NMH_BUFSIZ ? length : NMH_BUFSIZ);
 139     struct comp *cptr;
 140
 141     cptr = fmt_findcomp ("text");
 142     if (cptr) {
 143         free(cptr->c_text);
 144         cptr->c_text = mh_xstrdup(date);
 145     }
 146     fmt_scan (fmt, scanl, length, dat, NULL);
 147     fputs (charstring_buffer (scanl), stdout);
 148     charstring_free (scanl);
 149
 150     return status;
 151 }