ref: 81c9ede53f6f9ebd67e7134e664c98e08b9fcca6
dir: /sys/src/libc/fmt/vseprint.c/
#include <u.h> #include <libc.h> char* vseprint(char *buf, char *e, char *fmt, va_list args) { Fmt f; if(e <= buf) return nil; f.runes = 0; f.start = buf; f.to = buf; f.stop = e - 1; f.flush = nil; f.farg = nil; f.nfmt = 0; f.args = args; dofmt(&f, fmt); *(char*)f.to = '\0'; return f.to; }