test(test_suite): modified fctprintf() test case

Renamed 'user' to 'arg'

README.md

@@ -51,8 +51,8 @@ int sprintf(char* buffer, const char* format, ...);
 int snprintf(char* buffer, size_t count, const char* format, ...);
 int vsnprintf(char* buffer, size_t count, const char* format, va_list va);
 
-// call output function (instead of buffer)
-int fctprintf(void (*out)(char character, void* user), void* user, const char* format, ...);
+// use output function (instead of buffer) for streamlike interface
+int fctprintf(void (*out)(char character, void* arg), void* arg, const char* format, ...);
 ```
 
 

printf.c

@@ -77,10 +77,10 @@
 typedef void (*out_fct_type)(char character, char* buffer, size_t idx, size_t maxlen);
 
 
-// wrapper used as buffer
+// wrapper (used as buffer) for output function type
 typedef struct {
-  void (*fct)(char character, void* user);
-  void* user;
+  void  (*fct)(char character, void* arg);
+  void* arg;
 } out_fct_wrap_type;
 
 
@@ -696,11 +696,11 @@ int vsnprintf(char* buffer, size_t count, const char* format, va_list va)
 }
 
 
-int fctprintf(void (*out)(char character, void* user), void* user, const char* format, ...)
+int fctprintf(void (*out)(char character, void* arg), void* arg, const char* format, ...)
 {
   va_list va;
   va_start(va, format);
-  const out_fct_wrap_type out_fct_wrap = { out, user };
+  const out_fct_wrap_type out_fct_wrap = { out, arg };
   const int ret = _vsnprintf(_out_fct, (char*)&out_fct_wrap, (size_t)-1, format, va);
   va_end(va);
   return ret;

printf.h

@@ -88,7 +88,7 @@ int vsnprintf(char* buffer, size_t count, const char* format, va_list va);
  * \param format A string that specifies the format of the output
  * \return The number of characters that are sent to the output function, not counting the terminating null character
  */
-int fctprintf(void (*out)(char character, void* user), void* user, const char* format, ...);
+int fctprintf(void (*out)(char character, void* arg), void* arg, const char* format, ...);
 
 
 #ifdef __cplusplus

test/test_suite.cpp

@@ -42,11 +42,18 @@ namespace test {
 // dummy putchar
 static char   printf_buffer[100];
 static size_t printf_idx = 0U;
+
 void test::_putchar(char character)
 {
   printf_buffer[printf_idx++] = character;
 }
 
+void _out_fct(char character, void* arg)
+{
+  (void)arg;
+  printf_buffer[printf_idx++] = character;
+}
+
 
 
 TEST_CASE("printf", "[]" ) {
@@ -60,7 +67,7 @@ TEST_CASE("printf", "[]" ) {
 TEST_CASE("fctprintf", "[]" ) {
   printf_idx = 0U;
   memset(printf_buffer, 0xCC, 100U);
-  test::fctprintf(&test::_putchar, "This is a test of %X", 0x12EFU);
+  test::fctprintf(&_out_fct, nullptr, "This is a test of %X", 0x12EFU);
   REQUIRE(!strcmp(printf_buffer, "This is a test of 12EF"));
 }