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