Add strnlen helper

Signed-off-by: Carlos Maiolino <[email protected]>

2 files changed, 14 insertions, 0 deletions

diff --git a/src/include/toxic/string.h b/src/include/toxic/string.h
index 3cb4a30..b43942b 100644
--- a/src/include/toxic/string.h
+++ b/src/include/toxic/string.h
@@ -2,6 +2,7 @@
 #define STRING_H
 
 #include <stddef.h>
+#include <stdbool.h>
 
 #define NULL	((void *)0)
 
@@ -9,6 +10,7 @@ bool isdigit(char c);
 size_t strlen(const char *s);
 size_t strnlen(const char *s, size_t maxlen);
 char *strcpy(char *restrict dst, const char *restrict src);
+int strncmp(const char *s1, const char *s2, size_t n);
 
 void *memset(void *s, int c, size_t n);
 #endif /* STRING_H */
diff --git a/src/lib/string.c b/src/lib/string.c
index 365381b..d50435f 100644
--- a/src/lib/string.c
+++ b/src/lib/string.c
@@ -37,6 +37,18 @@ char *strcpy(char *restrict dst, const char *restrict src)
 	return dst;
 }
 
+int strncmp(const char *s1, const char *s2, size_t n)
+{
+	int i = 0;
+
+	for (i = 0; i < n; i++) {
+		if (s1[i] != s2[i])
+			return s1[i] - s2[i];
+	}
+
+	return 0;
+}
+
 void *memset(void *s, int c, size_t n) {
 
 	char *cur = (char*) s;