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