| 16 | } |
| 17 | |
| 18 | static inline size_t TryPrintf(void* ptr, size_t len, IOutputStream& out, const char* fmt, va_list params) { |
| 19 | va_list lst; |
| 20 | va_copy(lst, params); |
| 21 | const int ret = vsnprintf((char*)ptr, len, fmt, lst); |
| 22 | va_end(lst); |
| 23 | |
| 24 | if (ret < 0) { |
| 25 | return len; |
| 26 | } |
| 27 | |
| 28 | if ((size_t)ret < len) { |
| 29 | out.Write(ptr, (size_t)ret); |
| 30 | } |
| 31 | |
| 32 | return (size_t)ret; |
| 33 | } |
| 34 | |
| 35 | size_t Printf(IOutputStream& out, const char* fmt, va_list params) { |
| 36 | size_t guess = 0; |