[UCRT] Import Microsoft.Windows.SDK.CRTSource version 10.0.22621.3

Imported from https://www.nuget.org/packages/Microsoft.Windows.SDK.CRTSource/10.0.22621.3
License: MIT

sdk/lib/ucrt/stdio/input.cpp

@@ -0,0 +1,135 @@
+//
+// input.cpp
+//
+//      Copyright (c) Microsoft Corporation. All rights reserved.
+//
+// The core formatted input functions; all of the scanf-style functions call one
+// of these functions.
+//
+#define _ALLOW_OLD_VALIDATE_MACROS
+#include <corecrt_internal_stdio_input.h>
+
+using namespace __crt_stdio_input;
+
+
+// Enclaves do not have a file system, but they do allow in-memory operations
+// from stdio.
+#ifndef _UCRT_ENCLAVE_BUILD
+
+template <typename Character>
+static int __cdecl common_vfscanf(
+    unsigned __int64 const options,
+    FILE*            const stream,
+    Character const* const format,
+    _locale_t        const locale,
+    va_list          const arglist
+    ) throw()
+{
+    typedef input_processor<
+        Character,
+        stream_input_adapter<Character>
+    > processor_type;
+
+    _VALIDATE_RETURN(stream != nullptr, EINVAL, EOF);
+    _VALIDATE_RETURN(format != nullptr, EINVAL, EOF);
+
+    return __acrt_lock_stream_and_call(stream, [&]()
+    {
+        _LocaleUpdate locale_update(locale);
+
+        processor_type processor(
+            stream_input_adapter<Character>(stream),
+            options,
+            format,
+            locale_update.GetLocaleT(),
+            arglist);
+
+        return processor.process();
+    });
+}
+
+extern "C" int __cdecl __stdio_common_vfscanf(
+    unsigned __int64 const options,
+    FILE*            const stream,
+    char const*      const format,
+    _locale_t        const locale,
+    va_list          const arglist
+    )
+{
+    return common_vfscanf(options, stream, format, locale, arglist);
+}
+
+extern "C" int __cdecl __stdio_common_vfwscanf(
+    unsigned __int64 const options,
+    FILE*            const stream,
+    wchar_t const*   const format,
+    _locale_t        const locale,
+    va_list          const arglist
+    )
+{
+    return common_vfscanf(options, stream, format, locale, arglist);
+}
+
+#endif /* _UCRT_ENCLAVE_BUILD */
+
+
+template <typename Character>
+static int __cdecl common_vsscanf(
+    unsigned __int64 const options,
+    Character const* const buffer,
+    size_t           const buffer_count,
+    Character const* const format,
+    _locale_t        const locale,
+    va_list          const arglist
+    ) throw()
+{
+    typedef __acrt_stdio_char_traits<Character> char_traits;
+
+    typedef input_processor<
+        Character,
+        string_input_adapter<Character>
+    > processor_type;
+
+    _VALIDATE_RETURN(buffer != nullptr, EINVAL, EOF);
+    _VALIDATE_RETURN(format != nullptr, EINVAL, EOF);
+
+    // The number of elements to consider when scanning is the lesser of [1] the
+    // specified number of elements in the buffer or [2] the length of the string
+    // in the buffer.
+    size_t const buffer_count_for_stream = char_traits::tcsnlen(buffer, buffer_count);
+
+    _LocaleUpdate locale_update(locale);
+
+    processor_type processor(
+        string_input_adapter<Character>(buffer, buffer_count_for_stream),
+        options,
+        format,
+        locale_update.GetLocaleT(),
+        arglist);
+
+    return processor.process();
+}
+
+extern "C" int __cdecl __stdio_common_vsscanf(
+    unsigned __int64 const options,
+    char const*      const buffer,
+    size_t           const buffer_count,
+    char const*      const format,
+    _locale_t        const locale,
+    va_list          const arglist
+    )
+{
+    return common_vsscanf(options, buffer, buffer_count, format, locale, arglist);
+}
+
+extern "C" int __cdecl __stdio_common_vswscanf(
+    unsigned __int64 const options,
+    wchar_t const*   const buffer,
+    size_t           const buffer_count,
+    wchar_t const*   const format,
+    _locale_t        const locale,
+    va_list          const arglist
+    )
+{
+    return common_vsscanf(options, buffer, buffer_count, format, locale, arglist);
+}