source/extensions.cpp

   1 // Copyright (c) 2017 Google Inc.
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 #include "source/extensions.h"
  16
  17 #include <cassert>
  18 #include <sstream>
  19 #include <string>
  20
  21 #include "source/binary.h"
  22 #include "source/enum_string_mapping.h"
  23
  24 namespace spvtools {
  25
  26 std::string GetExtensionString(const spv_parsed_instruction_t* inst) {
  27   if (inst->opcode != static_cast<uint16_t>(spv::Op::OpExtension)) {
  28     return "ERROR_not_op_extension";
  29   }
  30
  31   assert(inst->num_operands == 1);
  32
  33   const auto& operand = inst->operands[0];
  34   assert(operand.type == SPV_OPERAND_TYPE_LITERAL_STRING);
  35   assert(inst->num_words > operand.offset);
  36   (void)operand; /* No unused variables in release builds. */
  37
  38   return spvDecodeLiteralStringOperand(*inst, 0);
  39 }
  40
  41 std::string ExtensionSetToString(const ExtensionSet& extensions) {
  42   std::stringstream ss;
  43   for (auto extension : extensions) {
  44     ss << ExtensionToString(extension) << " ";
  45   }
  46   return ss.str();
  47 }
  48
  49 }  // namespace spvtools