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1 | //===-- Format specifier converter for scanf -------------------*- C++ -*-===// |
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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_CONVERTER_UTILS_H |
10 | #define LLVM_LIBC_SRC_STDIO_SCANF_CORE_CONVERTER_UTILS_H |
11 | |
12 | #include "src/__support/ctype_utils.h" |
13 | #include "src/__support/macros/config.h" |
14 | #include "src/__support/str_to_float.h" |
15 | #include "src/stdio/scanf_core/core_structs.h" |
16 | |
17 | #include <stddef.h> |
18 | |
19 | namespace LIBC_NAMESPACE_DECL { |
20 | namespace scanf_core { |
21 | |
22 | LIBC_INLINE void write_int_with_length(uintmax_t output_val, |
23 | const FormatSection &to_conv) { |
24 | if ((to_conv.flags & NO_WRITE) != 0) { |
25 | return; |
26 | } |
27 | void *output_ptr = to_conv.output_ptr; |
28 | // The %p conversion uses this function, and is always void*. |
29 | if (to_conv.conv_name == 'p') { |
30 | *reinterpret_cast<void **>(output_ptr) = |
31 | reinterpret_cast<void *>(output_val); |
32 | return; |
33 | } |
34 | LengthModifier lm = to_conv.length_modifier; |
35 | switch (lm) { |
36 | case (LengthModifier::hh): |
37 | *reinterpret_cast<unsigned char *>(output_ptr) = |
38 | static_cast<unsigned char>(output_val); |
39 | break; |
40 | case (LengthModifier::h): |
41 | *reinterpret_cast<unsigned short *>(output_ptr) = |
42 | static_cast<unsigned short>(output_val); |
43 | break; |
44 | case (LengthModifier::NONE): |
45 | *reinterpret_cast<unsigned int *>(output_ptr) = |
46 | static_cast<unsigned int>(output_val); |
47 | break; |
48 | case (LengthModifier::l): |
49 | *reinterpret_cast<unsigned long *>(output_ptr) = |
50 | static_cast<unsigned long>(output_val); |
51 | break; |
52 | case (LengthModifier::ll): |
53 | case (LengthModifier::L): |
54 | *reinterpret_cast<unsigned long long *>(output_ptr) = |
55 | static_cast<unsigned long long>(output_val); |
56 | break; |
57 | case (LengthModifier::j): |
58 | *reinterpret_cast<uintmax_t *>(output_ptr) = |
59 | static_cast<uintmax_t>(output_val); |
60 | break; |
61 | case (LengthModifier::z): |
62 | *reinterpret_cast<size_t *>(output_ptr) = static_cast<size_t>(output_val); |
63 | break; |
64 | case (LengthModifier::t): |
65 | *reinterpret_cast<ptrdiff_t *>(output_ptr) = |
66 | static_cast<ptrdiff_t>(output_val); |
67 | break; |
68 | } |
69 | } |
70 | |
71 | LIBC_INLINE void write_float_with_length(char *str, |
72 | const FormatSection &to_conv) { |
73 | if ((to_conv.flags & NO_WRITE) != 0) { |
74 | return; |
75 | } |
76 | |
77 | void *output_ptr = to_conv.output_ptr; |
78 | |
79 | LengthModifier lm = to_conv.length_modifier; |
80 | switch (lm) { |
81 | case (LengthModifier::l): { |
82 | auto value = internal::strtofloatingpoint<double>(str); |
83 | *reinterpret_cast<double *>(output_ptr) = value; |
84 | break; |
85 | } |
86 | case (LengthModifier::L): { |
87 | auto value = internal::strtofloatingpoint<long double>(str); |
88 | *reinterpret_cast<long double *>(output_ptr) = value; |
89 | break; |
90 | } |
91 | default: { |
92 | auto value = internal::strtofloatingpoint<float>(str); |
93 | *reinterpret_cast<float *>(output_ptr) = value; |
94 | break; |
95 | } |
96 | } |
97 | } |
98 | |
99 | } // namespace scanf_core |
100 | } // namespace LIBC_NAMESPACE_DECL |
101 | |
102 | #endif // LLVM_LIBC_SRC_STDIO_SCANF_CORE_CONVERTER_UTILS_H |
103 |
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