1 /* 2 * Copyright 2022 Google LLC. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "include/sksl/SkSLPosition.h" 9 10 #include <algorithm> 11 12 namespace SkSL { 13 line(std::string_view source) const14int Position::line(std::string_view source) const { 15 SkASSERT(this->valid()); 16 if (fStartOffset == -1) { 17 return -1; 18 } 19 if (!source.data()) { 20 return -1; 21 } 22 // we allow the offset to equal the length, because that's where TK_END_OF_FILE is reported 23 SkASSERT(fStartOffset <= (int)source.length()); 24 int offset = std::min(fStartOffset, (int)source.length()); 25 int line = 1; 26 for (int i = 0; i < offset; i++) { 27 if (source[i] == '\n') { 28 ++line; 29 } 30 } 31 return line; 32 } 33 34 } // namespace SkSL 35