[tyndur-devel] [PATCH 3/5] libc: strndup()

[Kevin Wolf <kevin@xxxxxxxxxx>]

+ libc: strndup() implementiert

Signed-off-by: Kevin Wolf <kevin@xxxxxxxxxx>
---
 src/include/string.h    |  1 +
 src/lib/string/strdup.c | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/src/include/string.h b/src/include/string.h
index dd11385..c7a6983 100644
--- a/src/include/string.h
+++ b/src/include/string.h
@@ -78,6 +78,7 @@ void itoa(unsigned int n, char* s, unsigned int base);
 char* index(const char* p, int ch);
 
 char* strdup(const char* str);
+char* strndup(const char* str, size_t n);
 
 char *strpbrk(const char *s1, const char *s2);
 
diff --git a/src/lib/string/strdup.c b/src/lib/string/strdup.c
index 18d19eb..c4e139c 100644
--- a/src/lib/string/strdup.c
+++ b/src/lib/string/strdup.c
@@ -45,3 +45,21 @@ strdup(str)
 	memcpy(copy, str, len);
 	return (copy);
 }
+
+char* strndup(const char* s, size_t n)
+{
+    char* res;
+    size_t len = strlen(s);
+
+    if (len > n) {
+        len = n;
+    }
+
+    res = malloc(len + 1);
+    if (res) {
+        strncpy(res, s, len);
+        res[len] = '\0';
+    }
+
+    return res;
+}
-- 
2.1.4