diplodocus.org Git - nmh/blob - uip/dp.c

   1
   2 /*
   3  * dp.c -- parse dates 822-style
   4  *
   5  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #include <h/mh.h>
  11 #include <h/utils.h>
  12 #include <h/fmt_scan.h>
  13 #include <h/tws.h>
  14
  15 #define NDATES 100
  16
  17 #define WIDTH 78
  18
  19 #define FORMAT "%<(nodate{text})error: %{text}%|%(putstr(pretty{text}))%>"
  20
  21 #define DP_SWITCHES \
  22     X("form formatfile", 0, FORMSW) \
  23     X("format string", 5, FMTSW) \
  24     X("width columns", 0, WIDTHSW) \
  25     X("version", 0, VERSIONSW) \
  26     X("help", 0, HELPSW) \
  27
  28 #define X(sw, minchars, id) id,
  29 DEFINE_SWITCH_ENUM(DP);
  30 #undef X
  31
  32 #define X(sw, minchars, id) { sw, minchars, id },
  33 DEFINE_SWITCH_ARRAY(DP, switches);
  34 #undef X
  35
  36 static struct format *fmt;
  37
  38 static int dat[5];
  39
  40 /*
  41  * static prototypes
  42  */
  43 static int process (char *, int);
  44
  45
  46 int
  47 main (int argc, char **argv)
  48 {
  49     int datep = 0, width = -1, status = 0;
  50     char *cp, *form = NULL, *format = NULL, *nfs;
  51     char buf[BUFSIZ], **argp;
  52     char *dates[NDATES + 1]; /* Includes terminating NULL. */
  53
  54     if (nmh_init(argv[0], 2)) { return 1; }
  55
  56     argp = getarguments (invo_name, argc, argv, 1);
  57     while ((cp = *argp++)) {
  58         if (*cp == '-') {
  59             switch (smatch (++cp, switches)) {
  60                 case AMBIGSW:
  61                     ambigsw (cp, switches);
  62                     done (1);
  63                 case UNKWNSW:
  64                     adios (NULL, "-%s unknown", cp);
  65
  66                 case HELPSW:
  67                     snprintf (buf, sizeof(buf), "%s [switches] dates ...",
  68                         invo_name);
  69                     print_help (buf, switches, 1);
  70                     done (0);
  71                 case VERSIONSW:
  72                     print_version(invo_name);
  73                     done (0);
  74
  75                 case FORMSW:
  76                     if (!(form = *argp++) || *form == '-')
  77                         adios (NULL, "missing argument to %s", argp[-2]);
  78                     format = NULL;
  79                     continue;
  80                 case FMTSW:
  81                     if (!(format = *argp++) || *format == '-')
  82                         adios (NULL, "missing argument to %s", argp[-2]);
  83                     form = NULL;
  84                     continue;
  85
  86                 case WIDTHSW:
  87                     if (!(cp = *argp++) || *cp == '-')
  88                         adios (NULL, "missing argument to %s", argp[-2]);
  89                     width = atoi (cp);
  90                     continue;
  91             }
  92         }
  93         if (datep == NDATES)
  94             adios (NULL, "more than %d dates", NDATES);
  95         else
  96             dates[datep++] = cp;
  97     }
  98     dates[datep] = NULL;
  99
 100     if (datep == 0)
 101         adios (NULL, "usage: %s [switches] dates ...", invo_name);
 102
 103     /* get new format string */
 104     nfs = new_fs (form, format, FORMAT);
 105
 106     if (width == -1) {
 107         if ((width = sc_width ()) < WIDTH / 2) {
 108             /* Default:  width of the terminal, but at least WIDTH/2. */
 109             width = WIDTH / 2;
 110         }
 111         width -= 2;
 112     } else if (width == 0) {
 113         /* Unlimited width.  */
 114         width = INT_MAX;
 115     }
 116     fmt_compile (nfs, &fmt, 1);
 117
 118     dat[0] = 0;
 119     dat[1] = 0;
 120     dat[2] = 0;
 121     dat[3] = width;
 122     dat[4] = 0;
 123
 124     for (datep = 0; dates[datep]; datep++)
 125         status += process (dates[datep], width);
 126
 127     context_save ();    /* save the context file */
 128     fmt_free (fmt, 1);
 129     done (status);
 130     return 1;
 131 }
 132
 133
 134 static int
 135 process (char *date, int length)
 136 {
 137     int status = 0;
 138     charstring_t scanl =
 139         charstring_create (length < NMH_BUFSIZ ? length : NMH_BUFSIZ);
 140     struct comp *cptr;
 141
 142     cptr = fmt_findcomp ("text");
 143     if (cptr) {
 144         mh_xfree(cptr->c_text);
 145         cptr->c_text = mh_xstrdup(date);
 146     }
 147     fmt_scan (fmt, scanl, length, dat, NULL);
 148     fputs (charstring_buffer (scanl), stdout);
 149     charstring_free (scanl);
 150
 151     return status;
 152 }