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 "sbr/context_save.h"
  10 #include "sbr/ambigsw.h"
  11 #include "sbr/print_version.h"
  12 #include "sbr/print_help.h"
  13 #include "sbr/error.h"
  14 #include "h/done.h"
  15 #include "h/utils.h"
  16 #include "h/fmt_scan.h"
  17 #include "h/tws.h"
  18 #include "sbr/terminal.h"
  19
  20 #define NDATES 100
  21
  22 #define WIDTH 78
  23
  24 #define FORMAT "%<(nodate{text})error: %{text}%|%(putstr(pretty{text}))%>"
  25
  26 #define DP_SWITCHES \
  27     X("form formatfile", 0, FORMSW) \
  28     X("format string", 5, FMTSW) \
  29     X("width columns", 0, WIDTHSW) \
  30     X("version", 0, VERSIONSW) \
  31     X("help", 0, HELPSW) \
  32
  33 #define X(sw, minchars, id) id,
  34 DEFINE_SWITCH_ENUM(DP);
  35 #undef X
  36
  37 #define X(sw, minchars, id) { sw, minchars, id },
  38 DEFINE_SWITCH_ARRAY(DP, switches);
  39 #undef X
  40
  41 static struct format *fmt;
  42
  43 static int dat[5];
  44
  45 /*
  46  * static prototypes
  47  */
  48 static int process (char *, int);
  49
  50
  51 int
  52 main (int argc, char **argv)
  53 {
  54     int datep = 0, width = -1, status = 0;
  55     char *cp, *form = NULL, *format = NULL, *nfs;
  56     char buf[BUFSIZ], **argp;
  57     char *dates[NDATES + 1]; /* Includes terminating NULL. */
  58
  59     if (nmh_init(argv[0], true, false)) { return 1; }
  60
  61     argp = getarguments (invo_name, argc, argv, 1);
  62     while ((cp = *argp++)) {
  63         if (*cp == '-') {
  64             switch (smatch (++cp, switches)) {
  65                 case AMBIGSW:
  66                     ambigsw (cp, switches);
  67                     done (1);
  68                 case UNKWNSW:
  69                     die("-%s unknown", cp);
  70
  71                 case HELPSW:
  72                     snprintf (buf, sizeof(buf), "%s [switches] dates ...",
  73                         invo_name);
  74                     print_help (buf, switches, 1);
  75                     done (0);
  76                 case VERSIONSW:
  77                     print_version(invo_name);
  78                     done (0);
  79
  80                 case FORMSW:
  81                     if (!(form = *argp++) || *form == '-')
  82                         die("missing argument to %s", argp[-2]);
  83                     format = NULL;
  84                     continue;
  85                 case FMTSW:
  86                     if (!(format = *argp++) || *format == '-')
  87                         die("missing argument to %s", argp[-2]);
  88                     form = NULL;
  89                     continue;
  90
  91                 case WIDTHSW:
  92                     if (!(cp = *argp++) || *cp == '-')
  93                         die("missing argument to %s", argp[-2]);
  94                     width = atoi (cp);
  95                     continue;
  96             }
  97         }
  98         if (datep == NDATES)
  99             die("more than %d dates", NDATES);
 100         dates[datep++] = cp;
 101     }
 102     dates[datep] = NULL;
 103
 104     if (datep == 0)
 105         die("usage: %s [switches] dates ...", invo_name);
 106
 107     /* get new format string */
 108     nfs = new_fs (form, format, FORMAT);
 109
 110     if (width == -1) {
 111         if ((width = sc_width ()) < WIDTH / 2) {
 112             /* Default:  width of the terminal, but at least WIDTH/2. */
 113             width = WIDTH / 2;
 114         }
 115         width -= 2;
 116     } else if (width == 0) {
 117         /* Unlimited width.  */
 118         width = INT_MAX;
 119     }
 120     fmt_compile (nfs, &fmt, 1);
 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     fmt_free (fmt, 1);
 133     done(!!status);
 134     return 1;
 135 }
 136
 137
 138 static int
 139 process (char *date, int length)
 140 {
 141     int status = 0;
 142     charstring_t scanl =
 143         charstring_create (length < NMH_BUFSIZ ? length : NMH_BUFSIZ);
 144     struct comp *cptr;
 145
 146     cptr = fmt_findcomp ("text");
 147     if (cptr) {
 148         free(cptr->c_text);
 149         cptr->c_text = mh_xstrdup(date);
 150     }
 151     fmt_scan (fmt, scanl, length, dat, NULL);
 152     fputs (charstring_buffer (scanl), stdout);
 153     charstring_free (scanl);
 154
 155     return status;
 156 }