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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <errno.h>
#include "amqp.h"
#include "amqp_private.h"
#define INITIAL_TABLE_SIZE 16
int amqp_decode_table(amqp_bytes_t encoded,
amqp_pool_t *pool,
amqp_table_t *output,
int *offsetptr)
{
int offset = *offsetptr;
uint32_t tablesize = D_32(encoded, offset);
int num_entries = 0;
amqp_table_entry_t *entries = malloc(INITIAL_TABLE_SIZE * sizeof(amqp_table_entry_t));
int allocated_entries = INITIAL_TABLE_SIZE;
int limit;
offset += 4;
limit = offset + tablesize;
while (offset < limit) {
size_t keylen;
amqp_table_entry_t *entry;
keylen = D_8(encoded, offset);
offset++;
if (num_entries >= allocated_entries) {
allocated_entries = allocated_entries * 2;
entries = realloc(entries, allocated_entries * sizeof(amqp_table_entry_t));
}
entry = &entries[num_entries];
entry->key.len = keylen;
entry->key.bytes = D_BYTES(encoded, offset, keylen);
offset += keylen;
entry->kind = D_8(encoded, offset);
offset++;
switch (entry->kind) {
case 'S':
entry->value.bytes.len = D_32(encoded, offset);
offset += 4;
entry->value.bytes.bytes = D_BYTES(encoded, offset, entry->value.bytes.len);
offset += entry->value.bytes.len;
break;
case 'I':
entry->value.i32 = (int32_t) D_32(encoded, offset);
offset += 4;
break;
case 'D':
entry->value.decimal.decimals = D_8(encoded, offset);
offset++;
entry->value.decimal.value = D_32(encoded, offset);
offset += 4;
break;
case 'T':
entry->value.u64 = D_64(encoded, offset);
offset += 8;
break;
case 'F':
AMQP_CHECK_RESULT(amqp_decode_table(encoded, pool, &(entry->value.table), &offset));
break;
default:
return -EINVAL;
}
num_entries++;
}
output->num_entries = num_entries;
output->entries = amqp_pool_alloc(pool, num_entries * sizeof(amqp_table_entry_t));
memcpy(output->entries, entries, num_entries * sizeof(amqp_table_entry_t));
*offsetptr = offset;
return 0;
}
int amqp_encode_table(amqp_bytes_t encoded,
amqp_table_t *input,
int *offsetptr)
{
int offset = *offsetptr;
int tablesize_offset = offset;
int i;
offset += 4; /* skip space for the size of the table to be filled in later */
for (i = 0; i < input->num_entries; i++) {
amqp_table_entry_t *entry = &(input->entries[i]);
E_8(encoded, offset, entry->key.len);
offset++;
E_BYTES(encoded, offset, entry->key.len, entry->key.bytes);
offset += entry->key.len;
E_8(encoded, offset, entry->kind);
offset++;
switch (entry->kind) {
case 'S':
E_32(encoded, offset, entry->value.bytes.len);
offset += 4;
E_BYTES(encoded, offset, entry->value.bytes.len, entry->value.bytes.bytes);
offset += entry->value.bytes.len;
break;
case 'I':
E_32(encoded, offset, (uint32_t) entry->value.i32);
offset += 4;
break;
case 'D':
E_8(encoded, offset, entry->value.decimal.decimals);
offset++;
E_32(encoded, offset, entry->value.decimal.value);
offset += 4;
break;
case 'T':
E_64(encoded, offset, entry->value.u64);
offset += 8;
break;
case 'F':
AMQP_CHECK_RESULT(amqp_encode_table(encoded, &(entry->value.table), &offset));
break;
default:
return -EINVAL;
}
}
E_32(encoded, tablesize_offset, (offset - *offsetptr - 4));
*offsetptr = offset;
return 0;
}
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