How to improve buffer size determination for printfing various integer types?

Question

When converting an integer to text, typically I create a big buffer to use with sprintf() to hold any potential result.

char BigBuffer[50];         


        

Answer 1

asprintf() is handy, it takes a char ** and uses malloc() to get the needed space so you need to free() it later.

No need to worry about how much space you need.

int asprintf(char **ret, const char *format, ...); 

char *p
asprintf(&p, "%XXXX", ...); 
:
:
free(p);