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