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#include "interface.h"
#include "internals.h"
#include "id-errno.h"
static int id_extract_key(struct id_cookie *cookie, id_keys_t *key)
{
int err;
id_keys_t keyval;
keyval = (id_keys_t)extract_unsigned_pnum(cookie, 5, &err);
if (err != ID_EOK)
return err;
*key = keyval;
return ID_EOK;
}
/* in dictionary that cookie points to find key "key"; if found
* update cookie to associated "key" entry and return ID_EOK;
* else return -ID_ENOENT */
int id_dict_find_key(struct id_cookie *cookie, id_keys_t key)
{
int err;
unsigned int size;
id_keys_t d_key = (id_keys_t)-1;
idenum_t type;
struct id_cookie d_cookie = *cookie;
struct id_cookie t_cookie;
err = id_whatis(cookie, &type);
if (err != ID_EOK)
return err;
/* Header has to be a dictionary */
if (type != IDENUM_DICT)
return -ID_EINVAL;
/* Extract size of dictionary */
size = extract_unsigned_pnum(&d_cookie, 5, &err);
if (err != ID_EOK)
return err;
d_cookie.size = size;
d_cookie.start_offset = d_cookie.offset;
/* cookie->offset is now at first key */
while (d_cookie.offset < d_cookie.start_offset + d_cookie.size) {
/* Extract the key and move the cookie over key */
err = id_extract_key(&d_cookie, &d_key);
if (err != ID_EOK)
return err;
t_cookie = d_cookie;
/* move forward over the value */
size = id_extract_size(&d_cookie, &err);
if (err != ID_EOK)
return err;
if (key == d_key) {
d_cookie.size = size;
d_cookie.start_offset = t_cookie.offset;
d_cookie.offset = t_cookie.offset;
*cookie = d_cookie;
return ID_EOK;
}
d_cookie.offset += size;
}
return -ID_ENOENT;
}
/* Are these two types a match? */
static int id_match_type(idenum_t type_a, idenum_t type_b)
{
idenum_t tmp;
if (type_a == type_b)
return 1;
/* Oder the types (so the "*ANY*" types are in type_b) */
if ((int)type_a > (int)type_b) {
tmp = type_a;
type_a = type_b;
type_b = tmp;
}
if (type_b == IDENUM_ANY_STRING && (type_a == IDENUM_STR || type_a == IDENUM_HEXSTR))
return 1;
if (type_b == IDENUM_ANY_NUMBER && (type_a == IDENUM_NEG_NUM || type_a == IDENUM_POS_NUM))
return 1;
return 0;
}
/* Find in dictionary (that cookie points to) key "key" that is type "type" */
int id_find_dict(struct id_cookie *cookie, id_keys_t key, idenum_t type)
{
int err;
struct id_cookie d_cookie = *cookie;
idenum_t l_type;
err = id_dict_find_key(&d_cookie, key);
if (err != ID_EOK)
return err;
err = id_whatis(&d_cookie, &l_type);
if (err != ID_EOK)
return err;
if (!id_match_type(l_type, type))
return -ID_EINVAL;
*cookie = d_cookie;
return ID_EOK;
}
/* in dictionary pointed at by cookie, find the key "key"; verify its a
* string and copy its value */
int id_find_string(struct id_cookie *cookie, id_keys_t key, unsigned char *str_ptr, unsigned int *str_size)
{
int err, i;
unsigned char byte;
unsigned int size;
struct id_cookie d_cookie = *cookie;
err = id_find_dict(&d_cookie, key, IDENUM_ANY_STRING);
if (err != ID_EOK)
return err;
/* Extract the string size */
size = extract_unsigned_pnum(&d_cookie, 5, &err);
if (err != ID_EOK)
return err;
if (size > *str_size)
return -ID_ERANGE;
for(i=0; i<size; ++i) {
byte = id_fetch_byte(d_cookie.mem_ptr, d_cookie.offset++, &err);
if (err)
return err;
str_ptr[i] = byte;
}
*str_size = size;
return ID_EOK;
}
/* in dictionary pointed at by cookie, find the key "key"; verify its a
* number (either pos/neg) and return its value through *num */
int id_find_number(struct id_cookie *cookie, id_keys_t key, int *num)
{
int err;
int l_num;
idenum_t l_type;
struct id_cookie d_cookie = *cookie;
err = id_find_dict(&d_cookie, key, IDENUM_ANY_NUMBER);
if (err != ID_EOK)
return err;
err = id_whatis(&d_cookie, &l_type);
if (err != ID_EOK)
return err;
/* Extract the number size */
l_num = extract_unsigned_pnum(&d_cookie, 5, &err);
if (err != ID_EOK)
return err;
if (l_type == IDENUM_NEG_NUM)
l_num = -l_num;
*num = l_num;
return ID_EOK;
}
/* in dictionary pointed at by cookie, find the list of keys; verify they are
* numbers (either pos/neg) and return their value through *nums */
int id_find_numbers(struct id_cookie *cookie, id_keys_t *keys, int key_size, int *nums)
{
int i, err;
struct id_cookie d_cookie;
for (i=0;i<key_size; ++i) {
d_cookie = *cookie;
err = id_find_number(&d_cookie, keys[i], &nums[i]);
if (err != ID_EOK)
return err;
}
return ID_EOK;
}
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