MINOR: chunk: implement chunk_strncpy() to copy partial strings
This does like chunk_strcpy() except that the maximum string length may
be limited by the caller. A trailing zero is always appended. This is
particularly handy to extract portions of strings to put into the trash
for use with libc functions requiring a nul-terminated string.
diff --git a/include/common/chunk.h b/include/common/chunk.h
index e44feea..a061a34 100644
--- a/include/common/chunk.h
+++ b/include/common/chunk.h
@@ -176,6 +176,26 @@
return 1;
}
+/* copies at most <max> chars from str into <chk> followed by a trailing zero.
+ * Returns 0 in case of failure.
+ */
+static inline int chunk_strncpy(struct buffer *chk, const char *str, size_t max)
+{
+ size_t len;
+
+ len = strlen(str);
+ if (len > max)
+ len = max;
+
+ if (unlikely(len >= chk->size))
+ return 0;
+
+ memcpy(chk->area, str, len);
+ chk->area[len] = 0;
+ chk->data = len;
+ return 1;
+}
+
/* appends str after <chk> followed by a trailing zero. Returns 0 in
* case of failure.
*/