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1//
2// input.cpp
3//
4// Copyright (c) Microsoft Corporation. All rights reserved.
5//
6// The core formatted input functions; all of the scanf-style functions call one
7// of these functions.
8//
9#define _ALLOW_OLD_VALIDATE_MACROS
10#include <corecrt_internal_stdio_input.h>
11
12using namespace __crt_stdio_input;
13
14
15// Enclaves do not have a file system, but they do allow in-memory operations
16// from stdio.
17#ifndef _UCRT_ENCLAVE_BUILD
18
19template <typename Character>
20static int __cdecl common_vfscanf(
21 unsigned __int64 const options,
22 FILE* const stream,
23 Character const* const format,
24 _locale_t const locale,
25 va_list const arglist
26 ) throw()
27{
28 typedef input_processor<
29 Character,
30 stream_input_adapter<Character>
31 > processor_type;
32
33 _VALIDATE_RETURN(stream != nullptr, EINVAL, EOF);
34 _VALIDATE_RETURN(format != nullptr, EINVAL, EOF);
35
36 return __acrt_lock_stream_and_call(stream, [&]()
37 {
38 _LocaleUpdate locale_update(locale);
39
40 processor_type processor(
41 stream_input_adapter<Character>(stream),
42 options,
43 format,
44 locale_update.GetLocaleT(),
45 arglist);
46
47 return processor.process();
48 });
49}
50
51extern "C" int __cdecl __stdio_common_vfscanf(
52 unsigned __int64 const options,
53 FILE* const stream,
54 char const* const format,
55 _locale_t const locale,
56 va_list const arglist
57 )
58{
59 return common_vfscanf(options, stream, format, locale, arglist);
60}
61
62extern "C" int __cdecl __stdio_common_vfwscanf(
63 unsigned __int64 const options,
64 FILE* const stream,
65 wchar_t const* const format,
66 _locale_t const locale,
67 va_list const arglist
68 )
69{
70 return common_vfscanf(options, stream, format, locale, arglist);
71}
72
73#endif /* _UCRT_ENCLAVE_BUILD */
74
75
76template <typename Character>
77static int __cdecl common_vsscanf(
78 unsigned __int64 const options,
79 Character const* const buffer,
80 size_t const buffer_count,
81 Character const* const format,
82 _locale_t const locale,
83 va_list const arglist
84 ) throw()
85{
86 typedef __acrt_stdio_char_traits<Character> char_traits;
87
88 typedef input_processor<
89 Character,
90 string_input_adapter<Character>
91 > processor_type;
92
93 _VALIDATE_RETURN(buffer != nullptr, EINVAL, EOF);
94 _VALIDATE_RETURN(format != nullptr, EINVAL, EOF);
95
96 // The number of elements to consider when scanning is the lesser of [1] the
97 // specified number of elements in the buffer or [2] the length of the string
98 // in the buffer.
99 size_t const buffer_count_for_stream = char_traits::tcsnlen(buffer, buffer_count);
100
101 _LocaleUpdate locale_update(locale);
102
103 processor_type processor(
104 string_input_adapter<Character>(buffer, buffer_count_for_stream),
105 options,
106 format,
107 locale_update.GetLocaleT(),
108 arglist);
109
110 return processor.process();
111}
112
113extern "C" int __cdecl __stdio_common_vsscanf(
114 unsigned __int64 const options,
115 char const* const buffer,
116 size_t const buffer_count,
117 char const* const format,
118 _locale_t const locale,
119 va_list const arglist
120 )
121{
122 return common_vsscanf(options, buffer, buffer_count, format, locale, arglist);
123}
124
125extern "C" int __cdecl __stdio_common_vswscanf(
126 unsigned __int64 const options,
127 wchar_t const* const buffer,
128 size_t const buffer_count,
129 wchar_t const* const format,
130 _locale_t const locale,
131 va_list const arglist
132 )
133{
134 return common_vsscanf(options, buffer, buffer_count, format, locale, arglist);
135}