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