import RT-Thread@9217865c without bsp, libcpu and components/net

examples/utest/testcases/posix/stdio_h/functions/vfprintf_tc.c

@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+
+static void WriteFrmtd(FILE *stream ,char *format, ...)
+{
+   va_list args;
+
+   va_start(args, format);
+   vfprintf(stream, format, args);
+   va_end(args);
+}
+
+static int vfprintf_entry(void)
+{
+    int ret = 0;
+    char buf[64] = {0};
+    char test_data[] = "vfprintf test:2021-8-1 3.14 0xff";
+    FILE *stream = fopen("fopen_file.txt", "w");
+    if(stream)
+    {
+        WriteFrmtd(stream, "vfprintf test:%s-%d-%c %.02f 0x%x","2021" ,8 ,'1' ,3.14 ,0xff);
+        fclose(stream);
+
+        stream = fopen("fopen_file.txt","r");
+        fread(buf, 1, sizeof(test_data), stream);
+        if(strcmp(buf, test_data))
+        {
+            ret = -1;
+        }
+        fclose(stream);
+    }
+    else
+    {
+        ret = -1;
+    }
+
+    return ret;
+}
+
+#include <utest.h>
+static void test_vfprintf(void)
+{
+    uassert_int_equal(vfprintf_entry(), 0);
+}
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(test_vfprintf);
+}
+UTEST_TC_EXPORT(testcase, "rtt_posix_testcase.stdio_h."__FILE__, RT_NULL, RT_NULL, 10);
+