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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "mdb.h"
static int hash(char *key);
// getkeys - gets every single key in a key table
int *getkeys(tablist_t *list, int id)
{
int len = 2;
int *indexes = calloc(len, sizeof(int));
for (int i = 0, j = 0; i < TABLEN; ++i) {
if (j >= len) {
indexes = realloc(indexes, ++len * sizeof(int));
indexes[len - 1] = 0;
}
if (list[id].tab[i].key)
indexes[j++] = i;
}
return indexes;
}
// getkey - gets a single key from a keytable
// if it can't find the key it will return an empty table index
tabidx_t getkey(tablist_t *list, int id, char *key)
{
int idx = hash(key);
if (list[id].tab[idx].key == NULL)
return (tabidx_t) { .key = NULL, .flag = 0, .value = { 0 } };
while (strcmp(list[id].tab[idx].key, key) && idx < TABLEN)
idx++;
if (idx >= TABLEN)
return (tabidx_t) { .key = NULL, .flag = 0, .value = { 0 } };
return list[id].tab[idx];
}
// setkey - adds the given pair to the given key table
// if setkey fails it will return 1 otherwise 0
int setkey(tablist_t **list, int id, char *pair)
{
if (id >= (*list)[0].len) {
*list = realloc(*list, (id + 1) * sizeof(tablist_t));
for (int i = (*list)[0].len; i <= id; ++i) {
for (int j = 0; j < TABLEN; ++j)
(*list)[i].tab[j] = (tabidx_t) { NULL, 0, { 0 } };
}
(*list)[0].len = id + 1;
}
char *tok = strtok(pair, ":");
char *key = calloc(strlen(tok) + 1, sizeof(char));
strcpy(key, tok);
if (!(tok = strtok(NULL, ":")))
return 1;
int idx = hash(key);
while ((*list)[id].tab[idx].key != NULL &&
strcmp((*list)[id].tab[idx].key, key) &&
idx < TABLEN) idx++;
if (idx >= TABLEN)
return 2;
if (!(*list)[id].tab[idx].key)
(*list)[id].tab[idx].key = key;
else {
free(key);
if ((*list)[id].tab[idx].flag == 3)
free((*list)[id].tab[idx].value.str);
}
if (isdigit(*tok)) {
(*list)[id].tab[idx].flag = 1;
(*list)[id].tab[idx].value.num = atof(tok);
} else if (!strcmp(tok, "true") || !strcmp(tok, "false")) {
(*list)[id].tab[idx].flag = 2;
(*list)[id].tab[idx].value.boolean = !strcmp(tok, "true");
} else {
(*list)[id].tab[idx].flag = 3;
(*list)[id].tab[idx].value.str = calloc(strlen(tok) + 1, sizeof(char));
strcpy((*list)[id].tab[idx].value.str, tok);
}
return 0;
}
// delkey - removes the given key from the given key table
int delkey(tablist_t *list, int id, char *key)
{
int idx = hash(key);
if (list[id].tab[idx].key == NULL)
return 1;
while (strcmp(list[id].tab[idx].key, key) && idx < TABLEN)
idx++;
if (idx >= TABLEN)
return 2;
free(list[id].tab[idx].key);
list[id].tab[idx].key = NULL;
if (list[id].tab[idx].flag == 3) {
free(list[id].tab[idx].value.str);
list[id].tab[idx].value.str = NULL;
}
list[id].tab[idx].flag = 0;
return 0;
}
static int hash(char *key)
{
unsigned long h = 5381;
for (int i = 0; i < strlen(key); ++i)
h = ((h << 5) + h) + key[i];
return h % TABLEN;
}
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