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Diffstat (limited to 'winsup/mingw/mingwex/wmemmove.c')
-rw-r--r-- | winsup/mingw/mingwex/wmemmove.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/winsup/mingw/mingwex/wmemmove.c b/winsup/mingw/mingwex/wmemmove.c new file mode 100644 index 000000000..3c545ac32 --- /dev/null +++ b/winsup/mingw/mingwex/wmemmove.c @@ -0,0 +1,43 @@ +/* This source code was extracted from the Q8 package created and placed + in the PUBLIC DOMAIN by Doug Gwyn <gwyn@arl.mil> + last edit: 1999/11/05 gwyn@arl.mil + + Implements subclause 7.24 of ISO/IEC 9899:1999 (E). + + It supports an encoding where all char codes are mapped + to the *same* code values within a wchar_t or wint_t, + so long as no other wchar_t codes are used by the program. + +*/ + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <wchar.h> + +wchar_t * +wmemmove(s1, s2, n) + register wchar_t *s1; + register const wchar_t *s2; + register size_t n; + { + wchar_t *orig_s1 = s1; + + if ( s1 == NULL || s2 == NULL || n == 0 ) + return orig_s1; /* robust */ + + /* XXX -- The following test works only within a flat address space! */ + if ( s2 >= s1 ) + for ( ; n > 0; --n ) + *s1++ = *s2++; + else { + s1 += n; + s2 += n; + + for ( ; n > 0; --n ) + *--s1 = *--s2; + } + + return orig_s1; + } + |