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#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "include/parser.h"
int blen;
static void addbyte(struct byte *bytes, int *pos, enum btype type, char *value);
static char *getpair(uint8_t *buf, int *pos);
struct byte *parse(uint8_t *buf)
{
char *value;
int len = 2;
struct byte *bytes = calloc(len, sizeof(struct byte));
for (int i = 0, j = 0; buf[i]; ++i) {
if (j >= len)
len *= 2;
bytes = realloc(bytes, len * sizeof(struct byte));
switch (buf[i]) {
case 250:
value = getpair(buf, &i);
if (value == NULL)
addbyte(bytes, &j, ERROR, "Invalid Key-Value pair");
else
addbyte(bytes, &j, PAIR, value);
break;
case 251:
addbyte(bytes, &j, BEGIN, NULL);
break;
case 254:
addbyte(bytes, &j, END, NULL);
break;
default:
addbyte(bytes, &j, ERROR, "Invalid chunk");
}
blen = j;
}
return bytes;
}
static void addbyte(struct byte *bytes, int *pos, enum btype type, char *value)
{
bytes[*pos].type = type;
if (value != NULL) {
bytes[*pos].value = value;
}
else
bytes[*pos].value = NULL;
(*pos)++;
}
static char *getpair(uint8_t *buf, int *pos)
{
int i;
for (i = *pos + 1; buf[i] != 250 && buf[i] != 254 && buf[i]; ++i)
;
if (buf[i] != 250 && buf[i] != 254)
return NULL;
char *pair = calloc(i - *pos, sizeof(char));
int j;
for (j = *pos + 1; j < i; ++j)
pair[j - (*pos + 1)] = buf[j];
pair[j - (*pos + 1)] = '\0';
*pos = i - 1;
return pair;
}
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