hare

commit bec30775e3ed2c933a3b026c794536070a3f6848
parent a3926af6d3582f1ea30ca02fc46d9ff930f75f35
Author: Drew DeVault <sir@cmpwn.com>
Date:   Wed, 28 Apr 2021 10:10:11 -0400

rt: add memmove

Diffstat:
A
rt/memmove.ha
 | 
16
++++++++++++++++
M
scripts/gen-stdlib
 | 
1
+
M
stdlib.mk
 | 
2
++

3 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/rt/memmove.ha b/rt/memmove.ha
@@ -0,0 +1,16 @@
+export fn memmove(dest: *void, src: *void, n: size) void = {
+	let d = dest: *[*]u8, s = src: *[*]u8;
+	if (d: uintptr == s: uintptr) {
+		return;
+	};
+
+	if (d: uintptr < s: uintptr) {
+		for (let i = 0z; i < n; i += 1) {
+			d[i] = s[i];
+		};
+	} else {
+		for (let i = 0z; i < n; i += 1) {
+			d[n - i - 1] = s[n - i - 1];
+		};
+	};
+};
diff --git a/scripts/gen-stdlib b/scripts/gen-stdlib
@@ -34,6 +34,7 @@ gensrcs_rt() {
 		jmp.ha \
 		malloc.ha \
 		memcpy.ha \
+		memmove.ha \
 		memset.ha \
 		strcmp.ha \
 		$*
diff --git a/stdlib.mk b/stdlib.mk
@@ -21,6 +21,7 @@ stdlib_rt_srcs= \
 	$(STDLIB)/rt/jmp.ha \
 	$(STDLIB)/rt/malloc.ha \
 	$(STDLIB)/rt/memcpy.ha \
+	$(STDLIB)/rt/memmove.ha \
 	$(STDLIB)/rt/memset.ha \
 	$(STDLIB)/rt/strcmp.ha \
 	$(STDLIB)/rt/abort.ha \
@@ -930,6 +931,7 @@ testlib_rt_srcs= \
 	$(STDLIB)/rt/jmp.ha \
 	$(STDLIB)/rt/malloc.ha \
 	$(STDLIB)/rt/memcpy.ha \
+	$(STDLIB)/rt/memmove.ha \
 	$(STDLIB)/rt/memset.ha \
 	$(STDLIB)/rt/strcmp.ha \
 	$(STDLIB)/rt/start+test.ha \