vscnprintf (9) Linux Manual Page
vscnprintf – Format a string and place it in a buffer
Synopsis
int vscnprintf(char *buf, size_t size, const char *fmt, va_list args);Arguments
buf
-
- The buffer to place the result into
size
- The size of the buffer, including the trailing null space
fmt
- The format string to use
args
- Arguments for the format string
Description
The return value is the number of characters which have been written into the buf not including the trailing ‘\0’. If size is == 0 the function returns 0.
If you’re not already dealing with a va_list consider using scnprintf.
See the vsnprintf documentation for format string extensions over C99.