133 lines
2.4 KiB
C
133 lines
2.4 KiB
C
/* ex1-c: Advent2020 game, day 4/game 1
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*/
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#include <stdio.h>
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#include <stdlib.h>
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struct key {
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int mandatory;
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char *key;
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char val[80];
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} keys[] = {
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{ 1, "byr", "" },
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{ 1, "iyr", "" },
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{ 1, "eyr", "" },
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{ 1, "hgt", "" },
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{ 1, "hcl", "" },
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{ 1, "ecl", "" },
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{ 1, "pid", "" },
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{ 0, "cid", "" },
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{ -1, NULL, "" }
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};
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int my_strlen(str)
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char *str;
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{
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int i;
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for (i=0; *str; ++i, ++str)
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;
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return i;
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}
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int my_strcmp(str1, str2)
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char *str1, *str2;
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{
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for(; *str1 && (*str1==*str2); str1++, str2++)
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;
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return *str1 - *str2;
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}
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char *my_strcpy(dst, src)
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char *dst, *src;
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{
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char *p=dst;
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while (*dst++ = *src++)
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;
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return p;
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}
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struct key *get_key(key)
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char *key;
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{
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int i=0, found=0;
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for (i=0; keys[i].mandatory != -1; ++i) {
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if (!my_strcmp(keys[i].key, key)) {
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found=1;
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break;
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}
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}
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return found? &keys[i]: NULL;
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}
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struct key *set_key(key, val)
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char *key, *val;
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{
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struct key *thekey;
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if (thekey=get_key(key))
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my_strcpy(thekey->val, val);
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return thekey;
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}
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void print_keys()
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{
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int i=0;
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printf("keys: \n");
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for (i=0; keys[i].mandatory != -1; ++i)
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printf("\t[%s]=[%s]\n", keys[i].key, keys[i].val);
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return;
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}
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void reset_keys()
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{
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int i=0;
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for (i=0; keys[i].mandatory != -1; ++i)
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*keys[i].val='\0';
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return;
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}
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int valid_passport()
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{
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int valid=1;
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struct key *key=&keys[0];
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while (key->mandatory != -1) {
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if (key->mandatory && !*key->val) {
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valid=0;
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break;
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}
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key++;
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}
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return valid;
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}
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int main(ac, av)
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char **av;
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{
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int consumed, nkeys, nvalid=0, count=0;
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char line[160], key[80], val[80];
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char *p;
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while (fgets(line, sizeof line, stdin)) {
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nkeys=0;
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p=line;
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consumed=1;
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while (sscanf(p, "%[^:]: %s %n", key, val, &consumed)==2) {
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set_key(key, val);
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p+=consumed;
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nkeys++;
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}
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if (!nkeys) { /* empty line: reset */
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nvalid += valid_passport();
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count++;
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reset_keys();
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}
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}
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nvalid += valid_passport();
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count++;
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printf("%s : valid=%d/%d\n", *av, nvalid, count);
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exit (0);
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}
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