Move files out of root into core, dos, and utils

Move source files out of the root directory; the root is a mess and
has become virtually unmaintainable.  The Syslinux core now lives in
core/; the Linux and generic utilities has moved into utils/, and
copybs.com has moved into dos/; it had to go somewhere, and it seemed
as good a place as any.

1 files changed, 28 insertions, 0 deletions

diff --git a/core/strecpy.inc b/core/strecpy.inc
new file mode 100644
index 00000000..1fc53e96
--- /dev/null
+++ b/core/strecpy.inc
@@ -0,0 +1,28 @@
+;
+; strecpy: Copy DS:SI -> ES:DI up to and including a null byte;
+;	   on exit SI and DI point to the byte *after* the null byte.
+;	   BP holds a pointer to the first byte beyond the end of the
+;	   target buffer; return with CF=1 if target buffer overflows;
+;	   the output is still zero-terminated.
+;
+		section .text
+
+strecpy:
+		push ax
+		push bp
+		dec bp
+		dec bp
+.loop:		lodsb
+		stosb
+		and al,al	; CF=0
+		jz .done
+		cmp bp,di	; CF set if BP < DI
+		jnc .loop
+
+		; Zero-terminate overflow string
+		mov al,0	; Avoid changing flags
+		stosb
+.done:
+		pop bp
+		pop ax
+		ret