strlwr.cpp File Reference

#include <corecrt_internal.h>
#include <ctype.h>
#include <corecrt_internal_securecrt.h>
#include <limits.h>
#include <locale.h>
#include <string.h>

Include dependency graph for strlwr.cpp:

Go to the source code of this file.

Functions
char *__cdecl	_strlwr_l (char *string, _locale_t plocinfo)
char *__cdecl	_strlwr (char *string)
static errno_t __cdecl	_strlwr_s_l_stat (_Inout_updates_z_(sizeInBytes) char *const string, size_t const sizeInBytes, _locale_t const plocinfo) throw ()
errno_t __cdecl	_strlwr_s_l (char *string, size_t sizeInBytes, _locale_t plocinfo)
errno_t __cdecl	_strlwr_s (char *string, size_t sizeInBytes)

Function Documentation

_strlwr()

char *__cdecl _strlwr

(

char *

string

)

Definition at line 54 of file strlwr.cpp.

{
    if (!__acrt_locale_changed())
    {
        char * cp;
 
        /* validation section */
        _VALIDATE_RETURN(string != nullptr, EINVAL, nullptr);
 
        for (cp=string; *cp; ++cp)
        {
            if ('A' <= *cp && *cp <= 'Z')
                *cp += 'a' - 'A';
        }
 
        return(string);
    }
    else
    {
        _strlwr_s_l(string, (size_t)(-1), nullptr);
        return string;
    }
}

_strlwr_l()

char *__cdecl _strlwr_l	(	char *	string,
		_locale_t	plocinfo
	)

Definition at line 45 of file strlwr.cpp.

{
    _strlwr_s_l(string, (size_t)(-1), plocinfo);
    return string;
}

_strlwr_s()

errno_t __cdecl _strlwr_s	(	char *	string,
		size_t	sizeInBytes
	)

Definition at line 200 of file strlwr.cpp.

{
    return _strlwr_s_l(string, sizeInBytes, nullptr);
}

_strlwr_s_l()

errno_t __cdecl _strlwr_s_l	(	char *	string,
		size_t	sizeInBytes,
		_locale_t	plocinfo
	)

Definition at line 188 of file strlwr.cpp.

{
 
    _LocaleUpdate _loc_update(plocinfo);
 
    return _strlwr_s_l_stat(string, sizeInBytes, _loc_update.GetLocaleT());
}

_strlwr_s_l_stat()

static errno_t __cdecl _strlwr_s_l_stat ( _Inout_updates_z_(sizeInBytes) char *const  string, size_t const  sizeInBytes, _locale_t const  plocinfo  ) throw ( )

static

Definition at line 107 of file strlwr.cpp.

{
 
    int dstsize;                /* size of dst string buffer (include null)  */
    size_t stringlen;
 
    /* validation section */
    _VALIDATE_RETURN_ERRCODE(string != nullptr, EINVAL);
    stringlen = strnlen(string, sizeInBytes);
    if (stringlen >= sizeInBytes)
    {
        _RESET_STRING(string, sizeInBytes);
        _RETURN_DEST_NOT_NULL_TERMINATED(string, sizeInBytes);
    }
    _FILL_STRING(string, sizeInBytes, stringlen + 1);
 
    if ( plocinfo->locinfo->locale_name[LC_CTYPE] == nullptr ) {
        char *cp;       /* traverses string for C locale conversion */
 
        for ( cp = string ; *cp ; ++cp )
            if ( ('A' <= *cp) && (*cp <= 'Z') )
                *cp -= 'A' - 'a';
 
        return 0;
    }   /* C locale */
 
    /* Inquire size of dst string */
    if ( 0 == (dstsize = __acrt_LCMapStringA(
                    plocinfo,
                    plocinfo->locinfo->locale_name[LC_CTYPE],
                    LCMAP_LOWERCASE,
                    string,
                    -1,
                    nullptr,
                    0,
                    plocinfo->locinfo->_public._locale_lc_codepage,
                    TRUE )) )
    {
        errno = EILSEQ;
        return errno;
    }
 
    if (sizeInBytes < (size_t)dstsize)
    {
        _RESET_STRING(string, sizeInBytes);
        _RETURN_BUFFER_TOO_SMALL(string, sizeInBytes);
    }
 
    /* Allocate space for dst */
    __crt_scoped_stack_ptr<char> dst(_malloca_crt_t(char, dstsize));
    if (!dst)
    {
        errno = ENOMEM;
        return errno;
    }
 
    /* Map src string to dst string in alternate case */
    if (__acrt_LCMapStringA(
                plocinfo,
                plocinfo->locinfo->locale_name[LC_CTYPE],
                LCMAP_LOWERCASE,
                string,
                -1,
                dst.get(),
                dstsize,
                plocinfo->locinfo->_public._locale_lc_codepage,
                TRUE ) != 0)
    {
        /* copy dst string to return string */
        return strcpy_s(string, sizeInBytes, dst.get());
    }
    else
    {
        return errno = EILSEQ;
    }
}

Referenced by _strlwr_s_l().