change(printf): removed PRINTF_OVERRIDE_LIBC option

Removed the PRINTF_OVERRIDE_LIBC option. Basically this it not necessary and the ptintf() macro define can be used all the time.

printf.c

@@ -36,6 +36,14 @@
 #include "printf.h"
 
 
+// define this globally (e.g. gcc -DPRINTF_INCLUDE_CONFIG_H ...) to include the
+// printf_config.h header file
+// default: undefined
+#ifdef PRINTF_INCLUDE_CONFIG_H
+#include "printf_config.h"
+#endif
+
+
 // 'ntoa' conversion buffer size, this must be big enough to hold one converted
 // numeric number including padded zeros (dynamically created on stack)
 // default: 32 byte
@@ -699,11 +707,7 @@ static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const
 
 ///////////////////////////////////////////////////////////////////////////////
 
-#ifndef PRINTF_OVERRIDE_LIBC
-int printf(const char* format, ...)
-#else
 int printf_(const char* format, ...)
-#endif
 {
   va_list va;
   va_start(va, format);
@@ -714,11 +718,7 @@ int printf_(const char* format, ...)
 }
 
 
-#ifndef PRINTF_OVERRIDE_LIBC
-int sprintf(char* buffer, const char* format, ...)
-#else
 int sprintf_(char* buffer, const char* format, ...)
-#endif
 {
   va_list va;
   va_start(va, format);
@@ -728,11 +728,7 @@ int sprintf_(char* buffer, const char* format, ...)
 }
 
 
-#ifndef PRINTF_OVERRIDE_LIBC
-int snprintf(char* buffer, size_t count, const char* format, ...)
-#else
 int snprintf_(char* buffer, size_t count, const char* format, ...)
-#endif
 {
   va_list va;
   va_start(va, format);
@@ -742,21 +738,13 @@ int snprintf_(char* buffer, size_t count, const char* format, ...)
 }
 
 
-#ifndef PRINTF_OVERRIDE_LIBC
-int vsnprintf(char* buffer, size_t count, const char* format, va_list va)
-#else
 int vsnprintf_(char* buffer, size_t count, const char* format, va_list va)
-#endif
 {
   return _vsnprintf(_out_buffer, buffer, count, format, va);
 }
 
 
-#ifndef PRINTF_OVERRIDE_LIBC
 int fctprintf(void (*out)(char character, void* arg), void* arg, const char* format, ...)
-#else
-int fctprintf_(void (*out)(char character, void* arg), void* arg, const char* format, ...)
-#endif
 {
   va_list va;
   va_start(va, format);

printf.h

@@ -35,13 +35,6 @@
 #include <stdarg.h>
 #include <stddef.h>
 
-// define this globally (e.g. gcc -DPRINTF_INCLUDE_CONFIG_H ...) to include the
-// printf_config.h header file
-// default: undefined
-#ifdef PRINTF_INCLUDE_CONFIG_H
-#include "printf_config.h"
-#endif
-
 
 #ifdef __cplusplus
 extern "C" {
@@ -56,19 +49,16 @@ extern "C" {
 void _putchar(char character);
 
 
-// if PRINTF_OVERRIDE_LIBC is is defined, the regular printf() API is overridden by macro defines
-// and internal underscore-appended functions like printf_() are used to avoid conflicts with
-// LIBC defined printf() functions.
-// default: undefined
-#ifndef PRINTF_OVERRIDE_LIBC
-
 /**
  * Tiny printf implementation
  * You have to implement _putchar if you use printf()
+ * To avoid conflicts with the regular printf() API it is overridden by macro defines
+ * and internal underscore-appended functions like printf_() are used
  * \param format A string that specifies the format of the output
  * \return The number of characters that are written into the array, not counting the terminating null character
  */
-int printf(const char* format, ...);
+#define printf printf_
+int printf_(const char* format, ...);
 
 
 /**
@@ -78,7 +68,8 @@ int printf(const char* format, ...);
  * \param format A string that specifies the format of the output
  * \return The number of characters that are WRITTEN into the buffer, not counting the terminating null character
  */
-int sprintf(char* buffer, const char* format, ...);
+#define sprintf sprintf_
+int sprintf_(char* buffer, const char* format, ...);
 
 
 /**
@@ -89,8 +80,10 @@ int sprintf(char* buffer, const char* format, ...);
  * \return The number of characters that are WRITTEN into the buffer, not counting the terminating null character
  *         If the formatted string is truncated the buffer size (count) is returned
  */
-int  snprintf(char* buffer, size_t count, const char* format, ...);
+#define snprintf  snprintf_
-int vsnprintf(char* buffer, size_t count, const char* format, va_list va);
+#define vsnprintf vsnprintf_
+int  snprintf_(char* buffer, size_t count, const char* format, ...);
+int vsnprintf_(char* buffer, size_t count, const char* format, va_list va);
 
 
 /**
@@ -103,23 +96,6 @@ int vsnprintf(char* buffer, size_t count, const char* format, va_list va);
  */
 int fctprintf(void (*out)(char character, void* arg), void* arg, const char* format, ...);
 
-#else   // PRINTF_OVERRIDE_LIBC
-
-// override the LIBC defined function names
-#define printf    printf_
-#define sprintf   sprintf_
-#define snprintf  snprintf_
-#define vsnprintf vsnprintf_
-#define fctprintf fctprintf_
-
-int printf_(const char* format, ...);
-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);
-int fctprintf_(void (*out)(char character, void* arg), void* arg, const char* format, ...);
-
-#endif  // PRINTF_OVERRIDE_LIBC
-
 
 #ifdef __cplusplus
 }