ics2tree.c - ics2txt - convert icalendar .ics file to plain text
 (HTM) git clone git://bitreich.org/ics2txt git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/ics2txt
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       ---
       ics2tree.c (1959B)
       ---
            1 #include <unistd.h>
            2 #include <errno.h>
            3 #include <stdio.h>
            4 #include <stdlib.h>
            5 #include <string.h>
            6 #include <strings.h>
            7 #include "ical.h"
            8 #include "util.h"
            9 
           10 #ifndef __OpenBSD__
           11 #define pledge(...) 0
           12 #endif
           13 
           14 static void
           15 print_ruler(int level)
           16 {
           17         while (level-- > 0)
           18                 fprintf(stdout, ": ");
           19 }
           20 
           21 static int
           22 fn_field_name(IcalParser *p, char *name)
           23 {
           24         print_ruler(ical_get_level(p));
           25         printf("name %s\n", name);
           26         fflush(stdout);
           27         return 0;
           28 }
           29 
           30 static int
           31 fn_block_begin(IcalParser *p, char *name)
           32 {
           33         print_ruler(ical_get_level(p) - 1);
           34         printf("begin %s\n", name);
           35         fflush(stdout);
           36         return 0;
           37 }
           38 
           39 static int
           40 fn_param_value(IcalParser *p, char *name, char *value)
           41 {
           42         print_ruler(ical_get_level(p) + 1);
           43         printf("param %s=%s\n", name, value);
           44         fflush(stdout);
           45         return 0;
           46 }
           47 
           48 static int
           49 fn_field_value(IcalParser *p, char *name, char *value)
           50 {
           51         size_t len;
           52         (void)name;
           53 
           54         if (ical_get_value(p, value, &len) < 0)
           55                 return -1;
           56         print_ruler(ical_get_level(p) + 1);
           57         if (strcasecmp(name, "DTSTART") == 0 ||
           58             strcasecmp(name, "DTSTAMP") == 0 ||
           59             strcasecmp(name, "DTEND") == 0) {
           60                 time_t t;
           61                 if (ical_get_time(p, value, &t) != 0)
           62                         warn("%s: %s", p->errmsg, value);
           63                 printf("epoch %lld\n", t);
           64         } else {        
           65                 printf("value %s\n", value);
           66         }
           67         fflush(stdout);
           68         return 0;
           69 }
           70 
           71 int
           72 main(int argc, char **argv)
           73 {
           74         IcalParser p = {0};
           75         arg0 = *argv++;
           76 
           77         if (pledge("stdio", "") < 0)
           78                 err(1, "pledge: %s", strerror(errno));
           79 
           80         p.fn_field_name = fn_field_name;
           81         p.fn_block_begin = fn_block_begin;
           82         p.fn_param_value = fn_param_value;
           83         p.fn_field_value = fn_field_value;
           84 
           85         if (*argv == NULL) {
           86                 if (ical_parse(&p, stdin) < 0)
           87                         err(1, "parsing stdin:%d: %s", p.linenum, p.errmsg);
           88         }
           89 
           90         for (; *argv != NULL; argv++, argc--) {
           91                 FILE *fp;
           92 
           93                 debug("converting \"%s\"", *argv);
           94                 if ((fp = fopen(*argv, "r")) == NULL)
           95                         err(1, "opening %s", *argv);
           96                 if (ical_parse(&p, fp) < 0)
           97                         err(1, "parsing %s:%d: %s", *argv, p.linenum, p.errmsg);
           98                 fclose(fp);
           99         }
          100         return 0;
          101 }