1 files changed, 129 insertions, 0 deletions
diff --git a/third_party/wasm2c/include/wabt/literal.h b/third_party/wasm2c/include/wabt/literal.h
new file mode 100644
index 0000000000..5eb8f4b0da
--- /dev/null
+++ b/third_party/wasm2c/include/wabt/literal.h
@@ -0,0 +1,129 @@
+/*
+ * 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 "wabt/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 wast-lexer, assuming that the
+// literal has already matched the patterns defined there. As a result, the
+// only validation that is done is for overflow, not for otherwise bogus input.
+
+enum class LiteralType {
+  Int,
+  Float,
+  Hexfloat,
+  Infinity,
+  Nan,
+};
+
+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 ParseHexdigit(char c, uint32_t* out);
+Result ParseInt8(const char* s,
+                 const char* end,
+                 uint8_t* out,
+                 ParseIntType parse_type);
+Result ParseInt16(const char* s,
+                  const char* end,
+                  uint16_t* out,
+                  ParseIntType parse_type);
+Result ParseInt32(const char* s,
+                  const char* end,
+                  uint32_t* out,
+                  ParseIntType parse_type);
+Result ParseInt64(const char* s,
+                  const char* end,
+                  uint64_t* out,
+                  ParseIntType parse_type);
+Result ParseUint64(const char* s, const char* end, uint64_t* out);
+Result ParseUint128(const char* s, const char* end, v128* out);
+Result ParseFloat(LiteralType literal_type,
+                  const char* s,
+                  const char* end,
+                  uint32_t* out_bits);
+Result ParseDouble(LiteralType literal_type,
+                   const char* s,
+                   const char* end,
+                   uint64_t* out_bits);
+
+// Same as above but taking a string_view
+inline Result ParseInt8(std::string_view v,
+                        uint8_t* out,
+                        ParseIntType parse_type) {
+  return ParseInt8(v.data(), v.data() + v.size(), out, parse_type);
+}
+
+inline Result ParseInt16(std::string_view v,
+                         uint16_t* out,
+                         ParseIntType parse_type) {
+  return ParseInt16(v.data(), v.data() + v.size(), out, parse_type);
+}
+
+inline Result ParseInt32(std::string_view v,
+                         uint32_t* out,
+                         ParseIntType parse_type) {
+  return ParseInt32(v.data(), v.data() + v.size(), out, parse_type);
+}
+
+inline Result ParseInt64(std::string_view v,
+                         uint64_t* out,
+                         ParseIntType parse_type) {
+  return ParseInt64(v.data(), v.data() + v.size(), out, parse_type);
+}
+
+inline Result ParseUint64(std::string_view v, uint64_t* out) {
+  return ParseUint64(v.data(), v.data() + v.size(), out);
+}
+
+inline Result ParseUint128(std::string_view v, v128* out) {
+  return ParseUint128(v.data(), v.data() + v.size(), out);
+}
+
+inline Result ParseFloat(LiteralType literal_type,
+                         std::string_view v,
+                         uint32_t* out_bits) {
+  return ParseFloat(literal_type, v.data(), v.data() + v.size(), out_bits);
+}
+
+inline Result ParseDouble(LiteralType literal_type,
+                          std::string_view v,
+                          uint64_t* out_bits) {
+  return ParseDouble(literal_type, v.data(), v.data() + v.size(), out_bits);
+}
+
+void WriteFloatHex(char* buffer, size_t size, uint32_t bits);
+void WriteDoubleHex(char* buffer, size_t size, uint64_t bits);
+void WriteUint128(char* buffer, size_t size, v128 bits);
+
+}  // namespace wabt
+
+#endif /* WABT_LITERAL_H_ */