HW4: 準備 build system

1 files changed, 44 insertions, 0 deletions

diff --git a/hw4/l4basic/l4str.c b/hw4/l4basic/l4str.c
new file mode 100644
index 0000000..fa1d31b
--- /dev/null
+++ b/hw4/l4basic/l4str.c
@@ -0,0 +1,44 @@
+#include "memwrap.h"
+/* This file is modified by autogen.sh */
+/* vim: set sw=4 ts=4 sts=4 et: */
+
+#include "l4str.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+bool lbs_str_has_suffix (const char* str, const char* suffix) {
+    size_t len = strlen (str);
+    size_t suflen = strlen (suffix);
+    int i, j;
+    for (i = len - 1, j = suflen - 1; i >= 0 && j >= 0; i--, j--) {
+        if (str[i] != suffix[j]) {
+            return false;
+        }
+    }
+    if (i < 0 && j >= 0) {
+        return false;
+    }
+    return true;
+}
+
+char* lbs_str_printf (const char* format, ...) {
+    va_list ap;
+    char* newstr;
+    int len;
+
+    va_start (ap, format);
+    len = vsnprintf (NULL, 0, format, ap) + 1;
+    va_end (ap);
+
+    newstr = xmalloc (len);
+
+    va_start (ap, format);
+    vsnprintf (newstr, len, format, ap);
+    va_end (ap);
+
+    return newstr;
+}
+