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#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include "agenda_entry.h"
#define BS 1024 //blocksize for buffers
static char *read_file_to_buffer(char *filename) {
int fd = open(filename, O_RDONLY);
if (fd < 0) return NULL; // if error opening file, return NULLptr
size_t bufsize = BS;
size_t bufread = 0;
char *buf = (char *)malloc(bufsize);
char *newbuf;
while (read(fd, buf + bufread, BS) == BS) {
newbuf = (char *)malloc(bufsize + BS);
strncpy(newbuf, buf, bufsize);
free(buf);
buf = newbuf;
bufsize += BS;
bufread += BS;
}
close(fd);
return buf;
}
static entry *read_entries_to_array(char *buffer, int *entries) {
unsigned long numentries = 5;
int idx = 0;
entry *ret = (entry *)malloc(numentries * sizeof(entry));
char *cursor = buffer;
while (cursor) {
if ((size_t)idx == numentries) {
entry *newret = (entry *)malloc((numentries + 5) * sizeof(entry));
memcpy(newret, ret, ((size_t)idx)*sizeof(entry));
free(ret);
ret = newret;
numentries += 5;
}
ret[idx++] = read_agenda_entry(cursor);
cursor = next_entry(cursor);
}
*entries = idx;
return ret;
}
int main(int argc, char **argv) {
// unbuffering stdout in order to prevent leaks
// has the added benefit of reducing memory usage too
setvbuf(stdout, NULL, _IONBF, 0);
if (argc <= 1) {
printf("no agenda file supplied!\nUsage: otc <agendafile>\n");
return -1;
}
// read file into buf
char *buf = read_file_to_buffer(argv[1]);
if (!buf){ // abort if file could not be opened
fprintf(stderr, "Error: file \"%s\" does not exist!\n", argv[1]);
return -1;
}
if (strlen(buf) == 0) return -1; // don't do empty buffers
// read entries into array
int idx = 0;
entry *agenda = read_entries_to_array(buf, &idx);
free(buf);
// sort entries
sort_entry_array(agenda, idx);
// format nicely
char *e;
Date td = today();
Date tm = tomorrow(td);
Date nm = nextmonday(td);
Date nnm = nextweek(nm);
Date end = nextmonth(td);
Date last_date = (struct Date){ -1, -1, -1, -1};
for (int i = 0; i < idx; i++) {
if (!eql(agenda[i].date, last_date)) {
last_date = agenda[i].date;
if (!zero(last_date)) {
e = short_date_to_string(last_date);
if (strictly_smaller(last_date, td))
printf("\n%s [OUTATIME]:\n", e);
else if (eql(last_date, td))
printf("\n%s [TODAY]:\n", e);
else if (eql(last_date, tm))
printf("\n%s [TOMORROW]:\n", e);
else if (strictly_smaller(last_date, nm))
printf("\n%s [THIS WEEK]:\n", e);
else if (strictly_smaller(last_date, nnm))
printf("\n%s [NEXT WEEK]:\n", e);
else if (smaller(last_date, end))
printf("\n%s:\n", e);
free(e);
} else {
printf("\nUnscheduled:\n");
}
}
e = format_entry(agenda[i]);
if (zero(agenda[i].date) || smaller(agenda[i].date, end)) puts(e);
free(e);
}
// free up the memory
fclose(stdout);
destroy_entry_array(agenda, idx);
return 0;
}
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