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Diffstat (limited to 'private/crt32/string/i386/strset.asm')
| -rw-r--r-- | private/crt32/string/i386/strset.asm | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/private/crt32/string/i386/strset.asm b/private/crt32/string/i386/strset.asm new file mode 100644 index 000000000..8446a0812 --- /dev/null +++ b/private/crt32/string/i386/strset.asm @@ -0,0 +1,93 @@ + page ,132 + title strset - set all characters of string to character +;*** +;strset.asm - sets all charcaters of string to given character +; +; Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved. +; +;Purpose: +; defines _strset() - sets all of the characters in a string (except +; the '\0') equal to a given character. +; +;Revision History: +; 11-18-83 RN initial version +; 05-18-88 SJM Add model-independent (large model) ifdef +; 08-04-88 SJM convert to cruntime/ add 32-bit support +; 08-23-88 JCR 386 cleanup +; 10-26-88 JCR General cleanup for 386-only code +; 03-26-90 GJF Changed to _stdcall. Also, fixed the copyright. +; 01-18-91 GJF ANSI naming. +; 05-10-91 GJF Back to _cdecl, sigh... +; +;******************************************************************************* + + .xlist + include cruntime.inc + .list + +page +;*** +;char *_strset(string, val) - sets all of string to val +; +;Purpose: +; Sets all of characters in string (except the terminating '/0' +; character) equal to val. +; +; Algorithm: +; char * +; _strset (string, val) +; char *string; +; char val; +; { +; char *start = string; +; +; while (*string) +; *string++ = val; +; return(start); +; } +; +;Entry: +; char *string - string to modify +; char val - value to fill string with +; +;Exit: +; returns string -- now filled with val's +; +;Uses: +; +;Exceptions: +; +;******************************************************************************* + + CODESEG + + public _strset +_strset proc \ + uses edi, \ + string:ptr byte, \ + val:byte + + + mov edi,[string] ; di = string + mov edx,edi ; dx=string addr; save return value + + xor eax,eax ; ax = 0 + or ecx,-1 ; cx = -1 +repne scasb ; scan string & count bytes + inc ecx + inc ecx ; cx=-strlen + neg ecx ; cx=strlen + mov al,[val] ; al = byte value to store + mov edi,edx ; di=string addr +rep stosb + + mov eax,edx ; return value: string addr + +ifdef _STDCALL_ + ret DPSIZE + ISIZE ; _stdcall return +else + ret ; _cdecl return +endif + +_strset endp + end |