1 //===-- Int type specifier converters for scanf -----------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/stdio/scanf_core/ptr_converter.h" 10 11 #include "src/stdio/scanf_core/converter_utils.h" 12 #include "src/stdio/scanf_core/core_structs.h" 13 #include "src/stdio/scanf_core/int_converter.h" 14 #include "src/stdio/scanf_core/reader.h" 15 16 #include <stddef.h> 17 18 namespace LIBC_NAMESPACE { 19 namespace scanf_core { convert_pointer(Reader * reader,const FormatSection & to_conv)20int convert_pointer(Reader *reader, const FormatSection &to_conv) { 21 static const char nullptr_string[] = "(nullptr)"; 22 23 // Check if it's exactly the nullptr string, if so then it's a nullptr. 24 char cur_char = reader->getc(); 25 size_t i = 0; 26 for (; i < sizeof(nullptr_string) && to_lower(cur_char) == nullptr_string[i]; 27 ++i) { 28 cur_char = reader->getc(); 29 } 30 if (i == (sizeof(nullptr_string) - 1)) { 31 *reinterpret_cast<void **>(to_conv.output_ptr) = nullptr; 32 return READ_OK; 33 } else if (i > 0) { 34 return MATCHING_FAILURE; 35 } 36 37 reader->ungetc(cur_char); 38 39 // Else treat it as a hex int 40 return convert_int(reader, to_conv); 41 } 42 } // namespace scanf_core 43 } // namespace LIBC_NAMESPACE 44