+++ /dev/null
-/*
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- * Copyright (C) 2020 Francis Deslauriers <francis.deslauriers@efficios.com>
- */
-
-#define _LGPL_SOURCE
-#include <stddef.h>
-
-#define MSGPACK_FIXSTR_ID_MASK 0xA0
-#define MSGPACK_FIXMAP_ID_MASK 0x80
-#define MSGPACK_FIXARRAY_ID_MASK 0x90
-
-#define MSGPACK_NIL_ID 0xC0
-#define MSGPACK_FALSE_ID 0xC2
-#define MSGPACK_TRUE_ID 0xC3
-#define MSGPACK_MAP16_ID 0xDE
-#define MSGPACK_ARRAY16_ID 0xDC
-
-#define MSGPACK_UINT8_ID 0xCC
-#define MSGPACK_UINT16_ID 0xCD
-#define MSGPACK_UINT32_ID 0xCE
-#define MSGPACK_UINT64_ID 0xCF
-
-#define MSGPACK_INT8_ID 0xD0
-#define MSGPACK_INT16_ID 0xD1
-#define MSGPACK_INT32_ID 0xD2
-#define MSGPACK_INT64_ID 0xD3
-
-#define MSGPACK_FLOAT64_ID 0xCB
-#define MSGPACK_STR16_ID 0xDA
-
-#define MSGPACK_FIXINT_MAX ((1 << 7) - 1)
-#define MSGPACK_FIXINT_MIN -(1 << 5)
-#define MSGPACK_FIXMAP_MAX_COUNT 15
-#define MSGPACK_FIXARRAY_MAX_COUNT 15
-#define MSGPACK_FIXSTR_MAX_LENGTH 31
-
-#ifdef __KERNEL__
-#include <linux/bug.h>
-#include <linux/string.h>
-#include <linux/types.h>
-
-#include <lttng/msgpack.h>
-
-#define INT8_MIN (-128)
-#define INT16_MIN (-32767-1)
-#define INT32_MIN (-2147483647-1)
-#define INT8_MAX (127)
-#define INT16_MAX (32767)
-#define INT32_MAX (2147483647)
-#define UINT8_MAX (255)
-#define UINT16_MAX (65535)
-#define UINT32_MAX (4294967295U)
-
-#define byteswap_host_to_be16(_tmp) cpu_to_be16(_tmp)
-#define byteswap_host_to_be32(_tmp) cpu_to_be32(_tmp)
-#define byteswap_host_to_be64(_tmp) cpu_to_be64(_tmp)
-
-#define lttng_msgpack_assert(cond) WARN_ON(!(cond))
-
-#else /* __KERNEL__ */
-
-#include <lttng/ust-endian.h>
-#include <stdio.h>
-#include <string.h>
-
-#include "msgpack.h"
-
-#define byteswap_host_to_be16(_tmp) htobe16(_tmp)
-#define byteswap_host_to_be32(_tmp) htobe32(_tmp)
-#define byteswap_host_to_be64(_tmp) htobe64(_tmp)
-
-#define lttng_msgpack_assert(cond) ({ \
- if (!(cond)) \
- fprintf(stderr, "Assertion failed. %s:%d\n", __FILE__, __LINE__); \
- })
-#endif /* __KERNEL__ */
-
-static inline int lttng_msgpack_append_buffer(
- struct lttng_msgpack_writer *writer,
- const uint8_t *buf,
- size_t length)
-{
- int ret = 0;
-
- lttng_msgpack_assert(buf);
-
- /* Ensure we are not trying to write after the end of the buffer. */
- if (writer->write_pos + length > writer->end_write_pos) {
- ret = -1;
- goto end;
- }
-
- memcpy(writer->write_pos, buf, length);
- writer->write_pos += length;
-end:
- return ret;
-}
-
-static inline int lttng_msgpack_append_u8(
- struct lttng_msgpack_writer *writer, uint8_t value)
-{
- return lttng_msgpack_append_buffer(writer, &value, sizeof(value));
-}
-
-static inline int lttng_msgpack_append_u16(
- struct lttng_msgpack_writer *writer, uint16_t value)
-{
- value = byteswap_host_to_be16(value);
-
- return lttng_msgpack_append_buffer(writer, (uint8_t *) &value, sizeof(value));
-}
-
-static inline int lttng_msgpack_append_u32(
- struct lttng_msgpack_writer *writer, uint32_t value)
-{
- value = byteswap_host_to_be32(value);
-
- return lttng_msgpack_append_buffer(writer, (uint8_t *) &value, sizeof(value));
-}
-
-static inline int lttng_msgpack_append_u64(
- struct lttng_msgpack_writer *writer, uint64_t value)
-{
- value = byteswap_host_to_be64(value);
-
- return lttng_msgpack_append_buffer(writer, (uint8_t *) &value, sizeof(value));
-}
-
-static inline int lttng_msgpack_append_f64(
- struct lttng_msgpack_writer *writer, double value)
-{
-
- union {
- double d;
- uint64_t u;
- } u;
-
- u.d = value;
-
- return lttng_msgpack_append_u64(writer, u.u);
-}
-
-static inline int lttng_msgpack_append_i8(
- struct lttng_msgpack_writer *writer, int8_t value)
-{
- return lttng_msgpack_append_u8(writer, (uint8_t) value);
-}
-
-static inline int lttng_msgpack_append_i16(
- struct lttng_msgpack_writer *writer, int16_t value)
-{
- return lttng_msgpack_append_u16(writer, (uint16_t) value);
-}
-
-static inline int lttng_msgpack_append_i32(
- struct lttng_msgpack_writer *writer, int32_t value)
-{
- return lttng_msgpack_append_u32(writer, (uint32_t) value);
-}
-
-static inline int lttng_msgpack_append_i64(
- struct lttng_msgpack_writer *writer, int64_t value)
-{
- return lttng_msgpack_append_u64(writer, (uint64_t) value);
-}
-
-static inline int lttng_msgpack_encode_f64(
- struct lttng_msgpack_writer *writer, double value)
-{
- int ret;
-
- ret = lttng_msgpack_append_u8(writer, MSGPACK_FLOAT64_ID);
- if (ret)
- goto end;
-
- ret = lttng_msgpack_append_f64(writer, value);
- if (ret)
- goto end;
-
-end:
- return ret;
-}
-
-static inline int lttng_msgpack_encode_fixmap(
- struct lttng_msgpack_writer *writer, uint8_t count)
-{
- int ret = 0;
-
- lttng_msgpack_assert(count <= MSGPACK_FIXMAP_MAX_COUNT);
-
- ret = lttng_msgpack_append_u8(writer, MSGPACK_FIXMAP_ID_MASK | count);
- if (ret)
- goto end;
-
-end:
- return ret;
-}
-
-static inline int lttng_msgpack_encode_map16(
- struct lttng_msgpack_writer *writer, uint16_t count)
-{
- int ret;
-
- lttng_msgpack_assert(count > MSGPACK_FIXMAP_MAX_COUNT);
-
- ret = lttng_msgpack_append_u8(writer, MSGPACK_MAP16_ID);
- if (ret)
- goto end;
-
- ret = lttng_msgpack_append_u16(writer, count);
- if (ret)
- goto end;
-
-end:
- return ret;
-}
-
-static inline int lttng_msgpack_encode_fixarray(
- struct lttng_msgpack_writer *writer, uint8_t count)
-{
- int ret = 0;
-
- lttng_msgpack_assert(count <= MSGPACK_FIXARRAY_MAX_COUNT);
-
- ret = lttng_msgpack_append_u8(writer, MSGPACK_FIXARRAY_ID_MASK | count);
- if (ret)
- goto end;
-
-end:
- return ret;
-}
-
-static inline int lttng_msgpack_encode_array16(
- struct lttng_msgpack_writer *writer, uint16_t count)
-{
- int ret;
-
- lttng_msgpack_assert(count > MSGPACK_FIXARRAY_MAX_COUNT);
-
- ret = lttng_msgpack_append_u8(writer, MSGPACK_ARRAY16_ID);
- if (ret)
- goto end;
-
- ret = lttng_msgpack_append_u16(writer, count);
- if (ret)
- goto end;
-
-end:
- return ret;
-}
-
-static inline int lttng_msgpack_encode_fixstr(
- struct lttng_msgpack_writer *writer,
- const char *str,
- uint8_t len)
-{
- int ret;
-
- lttng_msgpack_assert(len <= MSGPACK_FIXSTR_MAX_LENGTH);
-
- ret = lttng_msgpack_append_u8(writer, MSGPACK_FIXSTR_ID_MASK | len);
- if (ret)
- goto end;
-
- ret = lttng_msgpack_append_buffer(writer, (uint8_t *) str, len);
- if (ret)
- goto end;
-
-end:
- return ret;
-}
-
-static inline int lttng_msgpack_encode_str16(
- struct lttng_msgpack_writer *writer,
- const char *str,
- uint16_t len)
-{
- int ret;
-
- lttng_msgpack_assert(len > MSGPACK_FIXSTR_MAX_LENGTH);
-
- ret = lttng_msgpack_append_u8(writer, MSGPACK_STR16_ID);
- if (ret)
- goto end;
-
- ret = lttng_msgpack_append_u16(writer, len);
- if (ret)
- goto end;
-
- ret = lttng_msgpack_append_buffer(writer, (uint8_t *) str, len);
- if (ret)
- goto end;
-
-end:
- return ret;
-}
-
-int lttng_msgpack_begin_map(struct lttng_msgpack_writer *writer, size_t count)
-{
- int ret;
-
- if (count >= (1 << 16)) {
- ret = -1;
- goto end;
- }
-
- if (count <= MSGPACK_FIXMAP_MAX_COUNT)
- ret = lttng_msgpack_encode_fixmap(writer, count);
- else
- ret = lttng_msgpack_encode_map16(writer, count);
-
- writer->map_nesting++;
-end:
- return ret;
-}
-
-int lttng_msgpack_end_map(struct lttng_msgpack_writer *writer)
-{
- lttng_msgpack_assert(writer->map_nesting > 0);
- writer->map_nesting--;
- return 0;
-}
-
-int lttng_msgpack_begin_array(
- struct lttng_msgpack_writer *writer, size_t count)
-{
- int ret;
-
- if (count >= (1 << 16)) {
- ret = -1;
- goto end;
- }
-
- if (count <= MSGPACK_FIXARRAY_MAX_COUNT)
- ret = lttng_msgpack_encode_fixarray(writer, count);
- else
- ret = lttng_msgpack_encode_array16(writer, count);
-
- writer->array_nesting++;
-end:
- return ret;
-}
-
-int lttng_msgpack_end_array(struct lttng_msgpack_writer *writer)
-{
- lttng_msgpack_assert(writer->array_nesting > 0);
- writer->array_nesting--;
- return 0;
-}
-
-int lttng_msgpack_write_str(struct lttng_msgpack_writer *writer,
- const char *str)
-{
- int ret;
- size_t length = strlen(str);
-
- if (length >= (1 << 16)) {
- ret = -1;
- goto end;
- }
-
- if (length <= MSGPACK_FIXSTR_MAX_LENGTH)
- ret = lttng_msgpack_encode_fixstr(writer, str, length);
- else
- ret = lttng_msgpack_encode_str16(writer, str, length);
-
-end:
- return ret;
-}
-
-int lttng_msgpack_write_nil(struct lttng_msgpack_writer *writer)
-{
- return lttng_msgpack_append_u8(writer, MSGPACK_NIL_ID);
-}
-
-int lttng_msgpack_write_true(struct lttng_msgpack_writer *writer)
-{
- return lttng_msgpack_append_u8(writer, MSGPACK_TRUE_ID);
-}
-
-int lttng_msgpack_write_false(struct lttng_msgpack_writer *writer)
-{
- return lttng_msgpack_append_u8(writer, MSGPACK_FALSE_ID);
-}
-
-int lttng_msgpack_write_unsigned_integer(
- struct lttng_msgpack_writer *writer, uint64_t value)
-{
- int ret = 0;
-
- if (value <= MSGPACK_FIXINT_MAX) {
- ret = lttng_msgpack_append_u8(writer, (uint8_t) value);
- if (ret)
- goto end;
- } else if (value <= UINT8_MAX) {
- ret = lttng_msgpack_append_u8(writer, MSGPACK_UINT8_ID);
- if (ret)
- goto end;
-
- ret = lttng_msgpack_append_u8(writer, (uint8_t) value);
- if (ret)
- goto end;
- } else if (value <= UINT16_MAX) {
- ret = lttng_msgpack_append_u8(writer, MSGPACK_UINT16_ID);
- if (ret)
- goto end;
-
- ret = lttng_msgpack_append_u16(writer, (uint16_t) value);
- if (ret)
- goto end;
- } else if (value <= UINT32_MAX) {
- ret = lttng_msgpack_append_u8(writer, MSGPACK_UINT32_ID);
- if (ret)
- goto end;
-
- ret = lttng_msgpack_append_u32(writer, (uint32_t) value);
- if (ret)
- goto end;
- } else {
- ret = lttng_msgpack_append_u8(writer, MSGPACK_UINT64_ID);
- if (ret)
- goto end;
-
- ret = lttng_msgpack_append_u64(writer, value);
- if (ret)
- goto end;
- }
-
-end:
- return ret;
-}
-
-int lttng_msgpack_write_signed_integer(struct lttng_msgpack_writer *writer, int64_t value)
-{
- int ret;
-
- if (value >= MSGPACK_FIXINT_MIN && value <= MSGPACK_FIXINT_MAX){
- ret = lttng_msgpack_append_i8(writer, (int8_t) value);
- if (ret)
- goto end;
- } else if (value >= INT8_MIN && value <= INT8_MAX) {
- ret = lttng_msgpack_append_u8(writer, MSGPACK_INT8_ID);
- if (ret)
- goto end;
-
- ret = lttng_msgpack_append_i8(writer, (int8_t) value);
- if (ret)
- goto end;
- } else if (value >= INT16_MIN && value <= INT16_MAX) {
- ret = lttng_msgpack_append_u8(writer, MSGPACK_INT16_ID);
- if (ret)
- goto end;
-
- ret = lttng_msgpack_append_i16(writer, (int16_t) value);
- if (ret)
- goto end;
- } else if (value >= INT32_MIN && value <= INT32_MAX) {
- ret = lttng_msgpack_append_u8(writer, MSGPACK_INT32_ID);
- if (ret)
- goto end;
-
- ret = lttng_msgpack_append_i32(writer, (int32_t) value);
- if (ret)
- goto end;
- } else {
- ret = lttng_msgpack_append_u8(writer, MSGPACK_INT64_ID);
- if (ret)
- goto end;
-
- ret = lttng_msgpack_append_i64(writer, value);
- if (ret)
- goto end;
- }
-
-end:
- return ret;
-}
-
-int lttng_msgpack_write_double(struct lttng_msgpack_writer *writer, double value)
-{
- return lttng_msgpack_encode_f64(writer, value);
-}
-
-void lttng_msgpack_writer_init(struct lttng_msgpack_writer *writer,
- uint8_t *buffer, size_t size)
-{
- lttng_msgpack_assert(buffer);
- lttng_msgpack_assert(size >= 0);
-
- writer->buffer = buffer;
- writer->write_pos = buffer;
- writer->end_write_pos = buffer + size;
-
- writer->array_nesting = 0;
- writer->map_nesting = 0;
-}
-
-void lttng_msgpack_writer_fini(struct lttng_msgpack_writer *writer)
-{
- memset(writer, 0, sizeof(*writer));
-}
projects / lttng-ust.git / blobdiff