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/stdio/printf_core/core_structs.h" 14 15 #include <inttypes.h> 16 #include <stddef.h> 17 18 namespace __llvm_libc { 19 namespace printf_core { 20 apply_length_modifier(uintmax_t num,LengthModifier lm)21inline uintmax_t apply_length_modifier(uintmax_t num, LengthModifier lm) { 22 switch (lm) { 23 case LengthModifier::none: 24 return num & cpp::NumericLimits<unsigned int>::max(); 25 case LengthModifier::l: 26 return num & cpp::NumericLimits<unsigned long>::max(); 27 case LengthModifier::ll: 28 case LengthModifier::L: 29 return num & cpp::NumericLimits<unsigned long long>::max(); 30 case LengthModifier::h: 31 return num & cpp::NumericLimits<unsigned short>::max(); 32 case LengthModifier::hh: 33 return num & cpp::NumericLimits<unsigned char>::max(); 34 case LengthModifier::z: 35 return num & cpp::NumericLimits<size_t>::max(); 36 case LengthModifier::t: 37 // We don't have unsigned ptrdiff so uintptr_t is used, since we need an 38 // unsigned type and ptrdiff is usually the same size as a pointer. 39 static_assert(sizeof(ptrdiff_t) == sizeof(uintptr_t)); 40 return num & cpp::NumericLimits<uintptr_t>::max(); 41 case LengthModifier::j: 42 return num; // j is intmax, so no mask is necessary. 43 } 44 } 45 46 #define RET_IF_RESULT_NEGATIVE(func) \ 47 { \ 48 int result = (func); \ 49 if (result < 0) \ 50 return result; \ 51 } 52 53 } // namespace printf_core 54 } // namespace __llvm_libc 55 56 #endif // LLVM_LIBC_SRC_STDIO_PRINTF_CORE_CONVERTER_UTILS_H 57