feat(printf): added new oprintf() function

Write formatted output directly to given output function

1 files changed, 11 insertions, 1 deletions

diff --git a/printf.h b/printf.h
index 37dbd54..c0ba2ae 100644
--- a/printf.h
+++ b/printf.h
@@ -60,7 +60,7 @@ int printf(const char* format, ...);
 

 /**

  * Tiny sprintf implementation

- * Due to security reasons (buffer overflow) YOU SHOULD CONSIDER USING SNPRINTF INSTEAD!

+ * Due to security reasons (buffer overflow) YOU SHOULD CONSIDER USING (V)SNPRINTF INSTEAD!

  * \param buffer A pointer to the buffer where to store the formatted string. MUST be big enough to store the output!

  * \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

@@ -80,6 +80,16 @@ int  snprintf(char* buffer, size_t count, const char* format, ...);
 int vsnprintf(char* buffer, size_t count, const char* format, va_list va);

 

 

+/**

+ * printf with output function

+ * You may use this as dynamic alternative to printf() with its fixed _putchar() output

+ * \param out An output function which takes one character

+ * \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 oprintf(void (*out)(char character), const char* format, ...);

+

+

 #ifdef __cplusplus

 }

 #endif