feat(printf): add vsnprintf function

fixes #5

1 files changed, 8 insertions, 6 deletions

diff --git a/printf.h b/printf.h
index d90ff45..e39bbb2 100644
--- a/printf.h
+++ b/printf.h
@@ -32,7 +32,7 @@
 #ifndef _PRINTF_H_

 #define _PRINTF_H_

 

-#include <stddef.h>

+#include <stdarg.h>

 

 

 #ifdef __cplusplus

@@ -62,19 +62,21 @@ int printf(const char* format, ...);
  * Due to security reasons (buffer overflow) YOU SHOULD CONSIDER USING 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 array, not counting the terminating null character

+ * \return The number of characters that are WRITTEN into the buffer, not counting the terminating null character

  */

 int sprintf(char* buffer, const char* format, ...);

 

 

 /**

- * Tiny snprintf implementation

+ * Tiny snprintf/vsnprintf implementation

  * \param buffer A pointer to the buffer where to store the formatted string

- * \param count The maximum number of characters to store in the buffer, INCLUDING the terminating null character

+ * \param count The maximum number of characters to store in the buffer, including a terminating null character

  * \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

+ * \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, ...);

+int  snprintf(char* buffer, size_t count, const char* format, ...);

+int vsnprintf(char* buffer, size_t count, const char* format, va_list va);

 

 

 #ifdef __cplusplus