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/*
* Copyright 2016 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef WABT_LITERAL_H_
#define WABT_LITERAL_H_
#include <cstdint>
#include "common.h"
namespace wabt {
/* These functions all return Result::Ok on success and Result::Error on failure.
*
* NOTE: the functions are written for use with the re2c lexer, assuming that
* the literal has already matched the regular expressions defined there. As a
* result, the only validation that is done is for overflow, not for otherwise
* bogus input. */
enum class ParseIntType {
UnsignedOnly = 0,
SignedAndUnsigned = 1,
};
/* Size of char buffer required to hold hex representation of a float/double */
#define WABT_MAX_FLOAT_HEX 20
#define WABT_MAX_DOUBLE_HEX 40
Result parse_hexdigit(char c, uint32_t* out);
Result parse_int32(const char* s,
const char* end,
uint32_t* out,
ParseIntType parse_type);
Result parse_int64(const char* s,
const char* end,
uint64_t* out,
ParseIntType parse_type);
Result parse_uint64(const char* s, const char* end, uint64_t* out);
Result parse_float(LiteralType literal_type,
const char* s,
const char* end,
uint32_t* out_bits);
Result parse_double(LiteralType literal_type,
const char* s,
const char* end,
uint64_t* out_bits);
void write_float_hex(char* buffer, size_t size, uint32_t bits);
void write_double_hex(char* buffer, size_t size, uint64_t bits);
} // namespace wabt
#endif /* WABT_LITERAL_H_ */
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