Warning: This file is not a C or C++ file. It does not have highlighting.
| 1 | //===-- Shared Converter Utilities for printf -------------------*- 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_PRINTF_CORE_CONVERTER_UTILS_H |
| 10 | #define LLVM_LIBC_SRC_STDIO_PRINTF_CORE_CONVERTER_UTILS_H |
| 11 | |
| 12 | #include "src/__support/CPP/limits.h" |
| 13 | #include "src/__support/macros/config.h" |
| 14 | #include "src/stdio/printf_core/core_structs.h" |
| 15 | |
| 16 | #include <inttypes.h> |
| 17 | #include <stddef.h> |
| 18 | |
| 19 | namespace LIBC_NAMESPACE_DECL { |
| 20 | namespace printf_core { |
| 21 | |
| 22 | LIBC_INLINE uintmax_t apply_length_modifier(uintmax_t num, |
| 23 | LengthSpec length_spec) { |
| 24 | auto [lm, bw] = length_spec; |
| 25 | switch (lm) { |
| 26 | case LengthModifier::none: |
| 27 | return num & cpp::numeric_limits<unsigned int>::max(); |
| 28 | case LengthModifier::l: |
| 29 | return num & cpp::numeric_limits<unsigned long>::max(); |
| 30 | case LengthModifier::ll: |
| 31 | case LengthModifier::L: |
| 32 | return num & cpp::numeric_limits<unsigned long long>::max(); |
| 33 | case LengthModifier::h: |
| 34 | return num & cpp::numeric_limits<unsigned short>::max(); |
| 35 | case LengthModifier::hh: |
| 36 | return num & cpp::numeric_limits<unsigned char>::max(); |
| 37 | case LengthModifier::z: |
| 38 | return num & cpp::numeric_limits<size_t>::max(); |
| 39 | case LengthModifier::t: |
| 40 | // We don't have unsigned ptrdiff so uintptr_t is used, since we need an |
| 41 | // unsigned type and ptrdiff is usually the same size as a pointer. |
| 42 | static_assert(sizeof(ptrdiff_t) == sizeof(uintptr_t)); |
| 43 | return num & cpp::numeric_limits<uintptr_t>::max(); |
| 44 | case LengthModifier::j: |
| 45 | return num; // j is intmax, so no mask is necessary. |
| 46 | case LengthModifier::w: |
| 47 | case LengthModifier::wf: { |
| 48 | uintmax_t mask; |
| 49 | if (bw == 0) { |
| 50 | mask = 0; |
| 51 | } else if (bw < sizeof(uintmax_t) * CHAR_BIT) { |
| 52 | mask = (static_cast<uintmax_t>(1) << bw) - 1; |
| 53 | } else { |
| 54 | mask = UINTMAX_MAX; |
| 55 | } |
| 56 | return num & mask; |
| 57 | } |
| 58 | } |
| 59 | __builtin_unreachable(); |
| 60 | } |
| 61 | |
| 62 | #define RET_IF_RESULT_NEGATIVE(func) \ |
| 63 | { \ |
| 64 | int result = (func); \ |
| 65 | if (result < 0) \ |
| 66 | return result; \ |
| 67 | } |
| 68 | |
| 69 | // This is used to represent which direction the number should be rounded. |
| 70 | enum class RoundDirection { Up, Down, Even }; |
| 71 | |
| 72 | } // namespace printf_core |
| 73 | } // namespace LIBC_NAMESPACE_DECL |
| 74 | |
| 75 | #endif // LLVM_LIBC_SRC_STDIO_PRINTF_CORE_CONVERTER_UTILS_H |
| 76 |
Warning: This file is not a C or C++ file. It does not have highlighting.