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/error.h"
  10 #include "h/done.h"
  11 #include <h/utils.h>
  12 #include <h/fmt_scan.h>
  13 #include <h/tws.h>
  14 #include "sbr/terminal.h"
  15
  16 #define NDATES 100
  17
  18 #define WIDTH 78
  19
  20 #define FORMAT "%<(nodate{text})error: %{text}%|%(putstr(pretty{text}))%>"
  21
  22 #define DP_SWITCHES \
  23     X("form formatfile", 0, FORMSW) \
  24     X("format string", 5, FMTSW) \
  25     X("width columns", 0, WIDTHSW) \
  26     X("version", 0, VERSIONSW) \
  27     X("help", 0, HELPSW) \
  28
  29 #define X(sw, minchars, id) id,
  30 DEFINE_SWITCH_ENUM(DP);
  31 #undef X
  32
  33 #define X(sw, minchars, id) { sw, minchars, id },
  34 DEFINE_SWITCH_ARRAY(DP, switches);
  35 #undef X
  36
  37 static struct format *fmt;
  38
  39 static int dat[5];
  40
  41 /*
  42  * static prototypes
  43  */
  44 static int process (char *, int);
  45
  46
  47 int
  48 main (int argc, char **argv)
  49 {
  50     int datep = 0, width = -1, status = 0;
  51     char *cp, *form = NULL, *format = NULL, *nfs;
  52     char buf[BUFSIZ], **argp;
  53     char *dates[NDATES + 1]; /* Includes terminating NULL. */
  54
  55     if (nmh_init(argv[0], true, false)) { return 1; }
  56
  57     argp = getarguments (invo_name, argc, argv, 1);
  58     while ((cp = *argp++)) {
  59         if (*cp == '-') {
  60             switch (smatch (++cp, switches)) {
  61                 case AMBIGSW:
  62                     ambigsw (cp, switches);
  63                     done (1);
  64                 case UNKWNSW:
  65                     die("-%s unknown", cp);
  66
  67                 case HELPSW:
  68                     snprintf (buf, sizeof(buf), "%s [switches] dates ...",
  69                         invo_name);
  70                     print_help (buf, switches, 1);
  71                     done (0);
  72                 case VERSIONSW:
  73                     print_version(invo_name);
  74                     done (0);
  75
  76                 case FORMSW:
  77                     if (!(form = *argp++) || *form == '-')
  78                         die("missing argument to %s", argp[-2]);
  79                     format = NULL;
  80                     continue;
  81                 case FMTSW:
  82                     if (!(format = *argp++) || *format == '-')
  83                         die("missing argument to %s", argp[-2]);
  84                     form = NULL;
  85                     continue;
  86
  87                 case WIDTHSW:
  88                     if (!(cp = *argp++) || *cp == '-')
  89                         die("missing argument to %s", argp[-2]);
  90                     width = atoi (cp);
  91                     continue;
  92             }
  93         }
  94         if (datep == NDATES)
  95             die("more than %d dates", NDATES);
  96         dates[datep++] = cp;
  97     }
  98     dates[datep] = NULL;
  99
 100     if (datep == 0)
 101         die("usage: %s [switches] dates ...", invo_name);
 102
 103     /* get new format string */
 104     nfs = new_fs (form, format, FORMAT);
 105
 106     if (width == -1) {
 107         if ((width = sc_width ()) < WIDTH / 2) {
 108             /* Default:  width of the terminal, but at least WIDTH/2. */
 109             width = WIDTH / 2;
 110         }
 111         width -= 2;
 112     } else if (width == 0) {
 113         /* Unlimited width.  */
 114         width = INT_MAX;
 115     }
 116     fmt_compile (nfs, &fmt, 1);
 117
 118     dat[0] = 0;
 119     dat[1] = 0;
 120     dat[2] = 0;
 121     dat[3] = width;
 122     dat[4] = 0;
 123
 124     for (datep = 0; dates[datep]; datep++)
 125         status += process (dates[datep], width);
 126
 127     context_save ();    /* save the context file */
 128     fmt_free (fmt, 1);
 129     done(!!status);
 130     return 1;
 131 }
 132
 133
 134 static int
 135 process (char *date, int length)
 136 {
 137     int status = 0;
 138     charstring_t scanl =
 139         charstring_create (length < NMH_BUFSIZ ? length : NMH_BUFSIZ);
 140     struct comp *cptr;
 141
 142     cptr = fmt_findcomp ("text");
 143     if (cptr) {
 144         free(cptr->c_text);
 145         cptr->c_text = mh_xstrdup(date);
 146     }
 147     fmt_scan (fmt, scanl, length, dat, NULL);
 148     fputs (charstring_buffer (scanl), stdout);
 149     charstring_free (scanl);
 150
 151     return status;
 152 }