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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253//// lconv_unsigned_char_initialization.cpp//// Copyright (c) Microsoft Corporation. All rights reserved.//// lconv initialization used to support an unsigned 'char' type (enabled by the// -J flag during compilation). Per the specification, some members of the lconv// structure must be initialized to CHAR_MAX. The value of CHAR_MAX, however,// depends on whether the 'char' type is signed or unsigned (it is 127 for a// signed 'char'; 255 for an unsigned 'char').//// By default, these members of lconv are initialized to SCHAR_MAX (127). If an// unsigned 'char' type is used, we call this function to update those members// to UCHAR_MAX (255). Note that this is not done for DLLs that are linked to// the CRT DLL, because we do not want such DLLs to override the -J setting for// an EXE linked to the CRT DLL.//// There is code in several other files that is required to make all of this work://// * locale.h: When -J is used to compile a source file that includes <locale.h>,// it generates an unresolved external to __do_unsigned_char_lconv_initialization.//// * lconv_unsigned_char_static.cpp: This file defines a global variable named// __do_unsigned_char_lconv_initialization, and is used during the link to// satisfy the unresolved external. This file adds a call to// __initialize_lconv_for_unsigned_char to the list of initializers to be// executed. That function (defined below) updates the fields of the lconv// structure to be set to UCHAR_MAX.//// * localeconv.cpp: This file defines the __acrt_lconv_c structure.//#include <corecrt_internal.h>#include <limits.h>#include <locale.h>
#pragma warning(disable: 4310) // cast truncates constant value
extern "C" int __cdecl __initialize_lconv_for_unsigned_char(){ __acrt_lconv_c.int_frac_digits = (char)UCHAR_MAX; __acrt_lconv_c.frac_digits = (char)UCHAR_MAX; __acrt_lconv_c.p_cs_precedes = (char)UCHAR_MAX; __acrt_lconv_c.p_sep_by_space = (char)UCHAR_MAX; __acrt_lconv_c.n_cs_precedes = (char)UCHAR_MAX; __acrt_lconv_c.n_sep_by_space = (char)UCHAR_MAX; __acrt_lconv_c.p_sign_posn = (char)UCHAR_MAX; __acrt_lconv_c.n_sign_posn = (char)UCHAR_MAX;
return 0;}