Migrate to using musl 0.9.13 strdup and strndup for better asm.js performace.

2 files changed, 25 insertions, 0 deletions

diff --git a/system/lib/libc/musl/src/string/strdup.c b/system/lib/libc/musl/src/string/strdup.c
new file mode 100644
index 00000000..dd5f80c1
--- /dev/null
+++ b/system/lib/libc/musl/src/string/strdup.c
@@ -0,0 +1,13 @@
+#include <stdlib.h>
+#include <string.h>
+#include "libc.h"
+
+char *__strdup(const char *s)
+{
+	size_t l = strlen(s);
+	char *d = malloc(l+1);
+	if (!d) return NULL;
+	return memcpy(d, s, l+1);
+}
+
+weak_alias(__strdup, strdup);
diff --git a/system/lib/libc/musl/src/string/strndup.c b/system/lib/libc/musl/src/string/strndup.c
new file mode 100644
index 00000000..617d27ba
--- /dev/null
+++ b/system/lib/libc/musl/src/string/strndup.c
@@ -0,0 +1,12 @@
+#include <stdlib.h>
+#include <string.h>
+
+char *strndup(const char *s, size_t n)
+{
+	size_t l = strnlen(s, n);
+	char *d = malloc(l+1);
+	if (!d) return NULL;
+	memcpy(d, s, l);
+	d[l] = 0;
+	return d;
+}