Function zipmapEncodeLength

src/zipmap.c:120–134

Encode the length 'l' writing it in 'p'. If p is NULL it just returns * the amount of bytes required to encode such a length. */

/* Encode the length 'l' writing it in 'p'. If p is NULL it just returns
 * the amount of bytes required to encode such a length. */
static unsigned int zipmapEncodeLength(unsigned char *p, unsigned int len) {
    if (p == NULL) {
        return ZIPMAP_LEN_BYTES(len);
    } else {
        if (len < ZIPMAP_BIGLEN) {
            p[0] = len;
            return 1;
        } else {
            p[0] = ZIPMAP_BIGLEN;
            memcpy(p+1,&len,sizeof(len));
            memrev32ifbe(p+1);
            return 1+sizeof(len);
        }
    }
}

/* Search for a matching key, returning a pointer to the entry inside the
 * zipmap. Returns NULL if the key is not found.