SPRINTF library

A simple implementation of sprintf using the fprintf library. Allocates an internal buffer and writes a string according to the format to the buffer. If the string is written in succession, it is appended to the previous one.

Initialisation

SPRINTF_vInit128() allocates a 128-byte region and initializes it.After the initialization, SPRINTF_Stream becomes available.

Print some data by SPRINTF.

1. SPRINTF_vRewind() rewinds the buffer to the beginning.

2. Write to the internal buffer by vfPrintf(SPRINTF_Stream, ...)

3. Continue with vfPrintf(SPRINTF_Stream, ...) will append to the previous output.

Referencing the internal buffer

The internal buffer is terminated with 0x00 '\0'. The first address can be obtained with SPRINTF_pu8GetBuff(). And SPRINTF_u16Length() is used in order to get the number of characters stored in the buffer.

Sample code

#include <sprintf.h>

    ...
    // initialisation
    SPRINTF_vInit128(); // allocate the internal buffer of 128 bytes
    
    ...
    static int iCt = 0; // some counter
    
    // write into the internal buffer
    SPRINTF_vRewind(); // rewind!
    vfPrintf(SPRINTF_Stream, "HELLO %d", 1123);
    vfPrintf(SPRINTF_Stream, ",GOODBYE", 1123);
    uint16 u16len = SPRINTF_u16Length();
    
    // Output (NUL-terminated, so it can be treated as a string)
    vfPrintf(&sSerStream, "%003d: %s"LB, 
        iCt++,
        SPRINTF_pu8GetBuff());