vsprintf.c (510B)
1 #include <stdarg.h> 2 #include <stdint.h> 3 #include <stdio.h> 4 5 #undef vsprintf 6 7 int 8 vsprintf(char *restrict s, const char *restrict fmt, va_list va) 9 { 10 /* 11 * we used to use SIZE_MAX here, but that is just 12 * wrong because we build a rp pointer that in that 13 * case it is just wp - 1 by definition. As it 14 * is impossible to span an object further than 15 * the end of the memory space we can use the number 16 * of bytes until the end of the address space. 17 */ 18 return vsnprintf(s, (char *)-1 - s, fmt, va); 19 }