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| 1 | //===-- Pointer specifier converter 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 | #ifndef LLVM_LIBC_SRC_STDIO_SCANF_CORE_PTR_CONVERTER_H |
| 10 | #define LLVM_LIBC_SRC_STDIO_SCANF_CORE_PTR_CONVERTER_H |
| 11 | |
| 12 | #include "src/__support/ctype_utils.h" |
| 13 | #include "src/__support/macros/config.h" |
| 14 | #include "src/stdio/scanf_core/core_structs.h" |
| 15 | #include "src/stdio/scanf_core/int_converter.h" |
| 16 | #include "src/stdio/scanf_core/reader.h" |
| 17 | |
| 18 | #include <stddef.h> |
| 19 | |
| 20 | namespace LIBC_NAMESPACE_DECL { |
| 21 | namespace scanf_core { |
| 22 | |
| 23 | template <typename T> |
| 24 | int convert_pointer(Reader<T> *reader, const FormatSection &to_conv) { |
| 25 | static const char nullptr_string[] = "(nullptr)"; |
| 26 | |
| 27 | // Check if it's exactly the nullptr string, if so then it's a nullptr. |
| 28 | char cur_char = reader->getc(); |
| 29 | size_t i = 0; |
| 30 | for (; i < (sizeof(nullptr_string) - 1) && |
| 31 | internal::tolower(cur_char) == nullptr_string[i]; |
| 32 | ++i) { |
| 33 | cur_char = reader->getc(); |
| 34 | } |
| 35 | if (i == (sizeof(nullptr_string) - 1)) { |
| 36 | *reinterpret_cast<void **>(to_conv.output_ptr) = nullptr; |
| 37 | return READ_OK; |
| 38 | } else if (i > 0) { |
| 39 | return MATCHING_FAILURE; |
| 40 | } |
| 41 | |
| 42 | reader->ungetc(cur_char); |
| 43 | |
| 44 | // Else treat it as a hex int |
| 45 | return convert_int(reader, to_conv); |
| 46 | } |
| 47 | |
| 48 | } // namespace scanf_core |
| 49 | } // namespace LIBC_NAMESPACE_DECL |
| 50 | |
| 51 | #endif // LLVM_LIBC_SRC_STDIO_SCANF_CORE_PTR_CONVERTER_H |
| 52 |
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