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