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Copy pathsource_position_native.cc
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66 lines (57 loc) · 1.9 KB
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// Copyright 2018 Google LLC
//
// 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
//
// https://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.
#include "eval/public/source_position_native.h"
namespace cel {
namespace ast {
namespace internal {
namespace {
std::pair<int, int32_t> GetLineAndLineOffset(const SourceInfo* source_info,
int32_t position) {
int line = 0;
int32_t line_offset = 0;
if (source_info != nullptr) {
for (const auto& curr_line_offset : source_info->line_offsets()) {
if (curr_line_offset > position) {
break;
}
line_offset = curr_line_offset;
line++;
}
}
if (line == 0) {
line++;
}
return std::pair<int, int32_t>(line, line_offset);
}
} // namespace
int32_t SourcePosition::line() const {
return GetLineAndLineOffset(source_info_, character_offset()).first;
}
int32_t SourcePosition::column() const {
int32_t position = character_offset();
std::pair<int, int32_t> line_and_offset =
GetLineAndLineOffset(source_info_, position);
return 1 + (position - line_and_offset.second);
}
int32_t SourcePosition::character_offset() const {
if (source_info_ == nullptr) {
return 0;
}
auto position_it = source_info_->positions().find(expr_id_);
return position_it != source_info_->positions().end() ? position_it->second
: 0;
}
} // namespace internal
} // namespace ast
} // namespace cel