init/stdlib: implement strcmp

2 files changed, 12 insertions, 0 deletions

diff --git a/src/init/stdlib.c b/src/init/stdlib.c
index 4bc90d2..3714324 100644
--- a/src/init/stdlib.c
+++ b/src/init/stdlib.c
@@ -13,6 +13,17 @@ int memcmp(const void *s1, const void *s2, size_t n) {
 	return 0;
 }
 
+int strcmp(const char *s1, const char *s2) {
+	while (*s1) {
+		if (*s1 != *s2) {
+			if (*s1 < *s2)  return -1;
+			else            return 1;
+		}
+		s1++; s2++;
+	}
+	return 0;
+}
+
 size_t strlen(const char *s) {
 	size_t c = 0;
 	while (*s++) c++;
diff --git a/src/init/stdlib.h b/src/init/stdlib.h
index 3e56beb..a3a8b64 100644
--- a/src/init/stdlib.h
+++ b/src/init/stdlib.h
@@ -6,6 +6,7 @@
 
 int memcmp(const void *s1, const void *s2, size_t n);
 
+int strcmp(const char *s1, const char *s2);
 size_t strlen(const char *s);
 
 int printf(const char *fmt, ...);