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/fmt_new.h"
  10 #include "sbr/getarguments.h"
  11 #include "sbr/smatch.h"
  12 #include "sbr/context_save.h"
  13 #include "sbr/ambigsw.h"
  14 #include "sbr/print_version.h"
  15 #include "sbr/print_help.h"
  16 #include "sbr/error.h"
  17 #include "h/done.h"
  18 #include "h/utils.h"
  19 #include "h/fmt_scan.h"
  20 #include "h/tws.h"
  21 #include "sbr/terminal.h"
  22
  23 #define NDATES 100
  24
  25 #define WIDTH 78
  26
  27 #define FORMAT "%<(nodate{text})error: %{text}%|%(putstr(pretty{text}))%>"
  28
  29 #define DP_SWITCHES \
  30     X("form formatfile", 0, FORMSW) \
  31     X("format string", 5, FMTSW) \
  32     X("width columns", 0, WIDTHSW) \
  33     X("version", 0, VERSIONSW) \
  34     X("help", 0, HELPSW) \
  35
  36 #define X(sw, minchars, id) id,
  37 DEFINE_SWITCH_ENUM(DP);
  38 #undef X
  39
  40 #define X(sw, minchars, id) { sw, minchars, id },
  41 DEFINE_SWITCH_ARRAY(DP, switches);
  42 #undef X
  43
  44 static struct format *fmt;
  45
  46 static int dat[5];
  47
  48 /*
  49  * static prototypes
  50  */
  51 static int process (char *, int);
  52
  53
  54 int
  55 main (int argc, char **argv)
  56 {
  57     int datep = 0, width = -1, status = 0;
  58     char *cp, *form = NULL, *format = NULL, *nfs;
  59     char buf[BUFSIZ], **argp;
  60     char *dates[NDATES + 1]; /* Includes terminating NULL. */
  61
  62     if (nmh_init(argv[0], true, false)) { return 1; }
  63
  64     argp = getarguments (invo_name, argc, argv, 1);
  65     while ((cp = *argp++)) {
  66         if (*cp == '-') {
  67             switch (smatch (++cp, switches)) {
  68                 case AMBIGSW:
  69                     ambigsw (cp, switches);
  70                     done (1);
  71                 case UNKWNSW:
  72                     die("-%s unknown", cp);
  73
  74                 case HELPSW:
  75                     snprintf (buf, sizeof(buf), "%s [switches] dates ...",
  76                         invo_name);
  77                     print_help (buf, switches, 1);
  78                     done (0);
  79                 case VERSIONSW:
  80                     print_version(invo_name);
  81                     done (0);
  82
  83                 case FORMSW:
  84                     if (!(form = *argp++) || *form == '-')
  85                         die("missing argument to %s", argp[-2]);
  86                     format = NULL;
  87                     continue;
  88                 case FMTSW:
  89                     if (!(format = *argp++) || *format == '-')
  90                         die("missing argument to %s", argp[-2]);
  91                     form = NULL;
  92                     continue;
  93
  94                 case WIDTHSW:
  95                     if (!(cp = *argp++) || *cp == '-')
  96                         die("missing argument to %s", argp[-2]);
  97                     width = atoi (cp);
  98                     continue;
  99             }
 100         }
 101         if (datep == NDATES)
 102             die("more than %d dates", NDATES);
 103         dates[datep++] = cp;
 104     }
 105     dates[datep] = NULL;
 106
 107     if (datep == 0)
 108         die("usage: %s [switches] dates ...", invo_name);
 109
 110     /* get new format string */
 111     nfs = new_fs (form, format, FORMAT);
 112
 113     if (width == -1) {
 114         if ((width = sc_width ()) < WIDTH / 2) {
 115             /* Default:  width of the terminal, but at least WIDTH/2. */
 116             width = WIDTH / 2;
 117         }
 118         width -= 2;
 119     } else if (width == 0) {
 120         /* Unlimited width.  */
 121         width = INT_MAX;
 122     }
 123     fmt_compile (nfs, &fmt, 1);
 124
 125     dat[0] = 0;
 126     dat[1] = 0;
 127     dat[2] = 0;
 128     dat[3] = width;
 129     dat[4] = 0;
 130
 131     for (datep = 0; dates[datep]; datep++)
 132         status += process (dates[datep], width);
 133
 134     context_save ();    /* save the context file */
 135     fmt_free (fmt, 1);
 136     done(!!status);
 137     return 1;
 138 }
 139
 140
 141 static int
 142 process (char *date, int length)
 143 {
 144     int status = 0;
 145     charstring_t scanl =
 146         charstring_create (length < NMH_BUFSIZ ? length : NMH_BUFSIZ);
 147     struct comp *cptr;
 148
 149     cptr = fmt_findcomp ("text");
 150     if (cptr) {
 151         free(cptr->c_text);
 152         cptr->c_text = mh_xstrdup(date);
 153     }
 154     fmt_scan (fmt, scanl, length, dat, NULL);
 155     fputs (charstring_buffer (scanl), stdout);
 156     charstring_free (scanl);
 157
 158     return status;
 159 }