1 // Copyright 2017 Google LLC 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 // Reads a file line by line and stores the data on the stack. This allows 16 // parsing files in one go without allocating. 17 #ifndef CPU_FEATURES_INCLUDE_INTERNAL_STACK_LINE_READER_H_ 18 #define CPU_FEATURES_INCLUDE_INTERNAL_STACK_LINE_READER_H_ 19 20 #include <stdbool.h> 21 22 #include "cpu_features_macros.h" 23 #include "internal/string_view.h" 24 25 CPU_FEATURES_START_CPP_NAMESPACE 26 27 typedef struct { 28 char buffer[STACK_LINE_READER_BUFFER_SIZE]; 29 StringView view; 30 int fd; 31 bool skip_mode; 32 } StackLineReader; 33 34 // Initializes a StackLineReader. 35 void StackLineReader_Initialize(StackLineReader* reader, int fd); 36 37 typedef struct { 38 StringView line; // A view of the line. 39 bool eof; // Nothing more to read, we reached EOF. 40 bool full_line; // If false the line was truncated to 41 // STACK_LINE_READER_BUFFER_SIZE. 42 } LineResult; 43 44 // Reads the file pointed to by fd and tries to read a full line. 45 LineResult StackLineReader_NextLine(StackLineReader* reader); 46 47 CPU_FEATURES_END_CPP_NAMESPACE 48 49 #endif // CPU_FEATURES_INCLUDE_INTERNAL_STACK_LINE_READER_H_ 50