1 /* 2 * COPYRIGHT: See COPYING in the top level directory 3 * PROJECT: ReactOS system libraries 4 * FILE: lib/sdk/crt/mbstring/mbslwr.c 5 * PURPOSE: Multibyte lowercase functions 6 * PROGRAMER: Eric Kohl 7 * Samuel Serapion, adapted from PROJECT C Library 8 */ 9 10 #include <precomp.h> 11 #include <mbstring.h> 12 #include <ctype.h> 13 14 unsigned int _mbbtolower(unsigned int c) 15 { 16 if (!_ismbblead(c) ) 17 return tolower(c); 18 return c; 19 } 20 21 /* 22 * @implemented 23 */ 24 unsigned int _mbctolower(unsigned int c) 25 { 26 return _ismbcupper (c) ? c + 0x21 : c; 27 } 28 29 /* 30 * @implemented 31 */ 32 unsigned char * _mbslwr(unsigned char *x) 33 { 34 unsigned char *y=x; 35 36 if (x == NULL) 37 { 38 return NULL; 39 } 40 41 while (*y) 42 { 43 if (!_ismbblead(*y)) 44 { 45 *y = tolower(*y); 46 y++; 47 } 48 else 49 { 50 *y = _mbctolower(*(unsigned short *)y); 51 y++; 52 } 53 } 54 return x; 55 } 56