lib/string/sprintf/, lib/, src/, tests/: Move all sprintf(3)-like APIs to a subdirectory

And have a separate file for each pair of APIs.

Signed-off-by: Alejandro Colomar <alx@kernel.org>

tests/unit/Makefile.am

@@ -7,7 +7,7 @@ check_PROGRAMS = \
     test_adds \
     test_atoi_strtoi \
     test_chkname \
-    test_sprintf \
+    test_snprintf \
     test_strncpy \
     test_strtcpy \
     test_typetraits \
@@ -78,16 +78,16 @@ test_logind_LDADD = \
     $(LIBSYSTEMD) \
     $(NULL)
 
-test_sprintf_SOURCES = \
-    ../../lib/string/sprintf.c \
-    test_sprintf.c \
+test_snprintf_SOURCES = \
+    ../../lib/string/sprintf/snprintf.c \
+    test_snprintf.c \
     $(NULL)
-test_sprintf_CFLAGS = \
+test_snprintf_CFLAGS = \
     $(AM_CFLAGS) \
     $(NULL)
-test_sprintf_LDFLAGS = \
+test_snprintf_LDFLAGS = \
     $(NULL)
-test_sprintf_LDADD = \
+test_snprintf_LDADD = \
     $(CMOCKA_LIBS) \
     $(NULL)
 
@@ -129,7 +129,7 @@ test_typetraits_LDADD = \
     $(NULL)
 
 test_xasprintf_SOURCES = \
-    ../../lib/string/sprintf.c \
+    ../../lib/string/sprintf/xasprintf.c \
     test_xasprintf.c \
     $(NULL)
 test_xasprintf_CFLAGS = \

tests/unit/test_snprintf.c

@@ -14,7 +14,7 @@
 #include <cmocka.h>
 
 #include "sizeof.h"
-#include "string/sprintf.h"
+#include "string/sprintf/snprintf.h"
 
 
 static void test_SNPRINTF_trunc(void **state);

tests/unit/test_xasprintf.c

@@ -16,7 +16,7 @@
 #include <stdint.h>  // Required by <cmocka.h>
 #include <cmocka.h>
 
-#include "string/sprintf.h"
+#include "string/sprintf/xasprintf.h"
 
 
 #define assert_unreachable()  assert_true(0)