files
kolibrios/programs/develop/ktcc/libc.obj/source/string/strncat.c
Andrew 4f450aa637
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develop/ktcc: Post-SVN tidy
- Move source code from `trunk` into program root directory.
- Update build files and include paths.
- Note: Line endings standardised from `CRLF` > `LF`, so best to view diffs with whitespace changes hidden.
2025-05-24 11:58:48 +01:00

23 lines
565 B
C

#include <string.h>
char* strncat(char* dst, const char* src, size_t n)
{
int d0, d1, d2, d3;
__asm__ __volatile__(
"repne\n\t"
"scasb\n\t"
"decl %1\n\t"
"movl %8,%3\n"
"1:\tdecl %3\n\t"
"js 2f\n\t"
"lodsb\n\t"
"stosb\n\t"
"testb %%al,%%al\n\t"
"jne 1b\n"
"2:\txorl %2,%2\n\t"
"stosb"
: "=&S"(d0), "=&D"(d1), "=&a"(d2), "=&c"(d3)
: "0"(src), "1"(dst), "2"(0), "3"(0xffffffff), "g"(n)
: "memory");
return dst;
}