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