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/*
* Copyright (C) 2014 René Kijewski <rene.kijewski@fu-berlin.de>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @ingroup sys
* @{
* @file
* @brief Universal Binary JSON deserializer
* @author René Kijewski <rene.kijewski@fu-berlin.de>
* @}
*/
#include "ubjson-internal.h"
#include "ubjson.h"
#include "byteorder.h"
#include <limits.h>
#define WRITE_CALL(FUN, ...) \
do { \
ssize_t wrote = (FUN)(__VA_ARGS__); \
if (wrote < 0) { \
return wrote; \
} \
result += wrote; \
} while (0)
#define WRITE_BUF(BUF, COUNT) \
WRITE_CALL(cookie->rw.write, cookie, (BUF), (COUNT))
#define WRITE_MARKER(MARKER) \
do { \
char marker_buf[] = { (char) (MARKER) }; \
WRITE_BUF(marker_buf, 1); \
} while (0)
#define MARKER_FUN(NAME, MARKER) \
ssize_t NAME(ubjson_cookie_t *restrict cookie) \
{ \
ssize_t result = 0; \
WRITE_MARKER((MARKER)); \
return result; \
}
MARKER_FUN(ubjson_write_null, UBJSON_MARKER_NULL)
MARKER_FUN(ubjson_write_noop, UBJSON_MARKER_NOOP)
MARKER_FUN(ubjson_open_array, UBJSON_MARKER_ARRAY_START)
MARKER_FUN(ubjson_close_array, UBJSON_MARKER_ARRAY_END)
MARKER_FUN(ubjson_open_object, UBJSON_MARKER_OBJECT_START)
MARKER_FUN(ubjson_close_object, UBJSON_MARKER_OBJECT_END)
ssize_t ubjson_write_bool(ubjson_cookie_t *restrict cookie, bool value)
{
static const char marker_false[] = { UBJSON_MARKER_FALSE };
static const char marker_true[] = { UBJSON_MARKER_TRUE };
return cookie->rw.write(cookie, value ? &marker_false : &marker_true, 1);
}
ssize_t ubjson_write_i32(ubjson_cookie_t *restrict cookie, int32_t value)
{
ssize_t result = 0;
if ((INT8_MIN <= value) && (value <= INT8_MAX)) {
WRITE_MARKER(UBJSON_MARKER_INT8);
WRITE_MARKER((uint8_t) value);
}
else if ((0 <= value) && (value <= UINT8_MAX)) {
WRITE_MARKER(UBJSON_MARKER_UINT8);
WRITE_MARKER((uint8_t) value);
}
else if ((INT16_MIN <= value) && (value <= UINT16_MAX)) {
WRITE_MARKER(UBJSON_MARKER_INT16);
network_uint16_t buf = byteorder_htons((uint16_t) value);
WRITE_BUF(&buf, sizeof(buf));
}
else {
WRITE_MARKER(UBJSON_MARKER_INT32);
network_uint32_t buf = byteorder_htonl((uint32_t) value);
WRITE_BUF(&buf, sizeof(buf));
}
return result;
}
ssize_t ubjson_write_i64(ubjson_cookie_t *restrict cookie, int64_t value)
{
if ((INT32_MIN <= value) && (value <= INT32_MAX)) {
return ubjson_write_i32(cookie, (int32_t) value);
}
ssize_t result = 0;
network_uint64_t buf = byteorder_htonll((uint64_t) value);
WRITE_BUF(&buf, sizeof(buf));
return result;
}
ssize_t ubjson_write_float(ubjson_cookie_t *restrict cookie, float value)
{
union {
float f;
uint32_t i;
} v = { .f = value };
ssize_t result = 0;
WRITE_MARKER(UBJSON_MARKER_FLOAT32);
network_uint32_t buf = byteorder_htonl(v.i);
WRITE_BUF(&buf, sizeof(buf));
return result;
}
ssize_t ubjson_write_double(ubjson_cookie_t *restrict cookie, double value)
{
union {
double f;
uint64_t i;
} v = { .f = value };
ssize_t result = 0;
WRITE_MARKER(UBJSON_MARKER_FLOAT64);
network_uint64_t buf = byteorder_htonll(v.i);
WRITE_BUF(&buf, sizeof(buf));
return result;
}
ssize_t ubjson_write_string(ubjson_cookie_t *restrict cookie, const void *value, size_t len)
{
ssize_t result = 0;
WRITE_MARKER(UBJSON_MARKER_STRING);
WRITE_CALL(ubjson_write_key, cookie, value, len);
return result;
}
static ssize_t _ubjson_write_length(ubjson_cookie_t *restrict cookie, size_t len)
{
ssize_t result = 0;
WRITE_MARKER(UBJSON_MARKER_COUNT);
WRITE_CALL(ubjson_write_i64, cookie, (int64_t) len);
return result;
}
ssize_t ubjson_open_array_len(ubjson_cookie_t *restrict cookie, size_t len)
{
ssize_t result = 0;
WRITE_CALL(ubjson_open_array, cookie);
if (len > 0) {
WRITE_CALL(_ubjson_write_length, cookie, len);
}
else {
WRITE_CALL(ubjson_close_array, cookie);
}
return result;
}
ssize_t ubjson_open_object_len(ubjson_cookie_t *restrict cookie, size_t len)
{
ssize_t result = 0;
WRITE_CALL(ubjson_open_object, cookie);
if (len > 0) {
WRITE_CALL(_ubjson_write_length, cookie, len);
}
else {
WRITE_CALL(ubjson_close_object, cookie);
}
return result;
}
ssize_t ubjson_write_key(ubjson_cookie_t *restrict cookie, const void *value, size_t len)
{
ssize_t result = 0;
WRITE_CALL(ubjson_write_i64, cookie, (int64_t) len);
WRITE_BUF(value, len);
return result;
}
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