NAME¶

vsnprintf - Format a string and place it in a buffer

SYNOPSIS¶

int vsnprintf(char * buf, size_t size, const char * fmt, va_list args);

ARGUMENTS¶

buf

size

fmt

args

DESCRIPTION¶

This function follows C99 vsnprintf, but has some extensions: pS output the name of a text symbol with offset ps output the name of a text symbol without offset pF output the name of a function pointer with its offset pf output the name of a function pointer without its offset pR output the address range in a struct resource pIS depending on sa_family of ´struct sockaddr *´ print IPv4/IPv6 address piS depending on sa_family of ´struct sockaddr *´ print IPv4/IPv6 address %*ph[CDN] a variable-length hex string with a separator (supports up to 64 bytes of the input) n is ignored

The return value is the number of characters which would be generated for the given input, excluding the trailing ´\0´, as per ISO C99. If you want to have the exact number of characters written into buf as return value (not including the trailing ´\0´), use vscnprintf. If the return is greater than or equal to size, the resulting string is truncated.

Call this function if you are already dealing with a va_list. You probably want snprintf instead.

COPYRIGHT¶