vx32

Local 9vx git repository for patches.
git clone git://r-36.net/vx32
Log | Files | Refs

sprintf.c (627B)

      1 
      2 #include <stdio.h>
      3 #include <errno.h>
      4 
      5 #include "ioprivate.h"
      6 
      7 struct sprintbuf {
      8 	char *buf;
      9 };
     10 
     11 static int
     12 sprintputch(int ch, struct sprintbuf *b)
     13 {
     14 	*b->buf++ = ch;
     15 	return 0;
     16 }
     17 
     18 int
     19 vsprintf(char *buf, const char *fmt, va_list ap)
     20 {
     21 	struct sprintbuf b = {buf};
     22 
     23 	if (buf == NULL) {
     24 		errno = EINVAL;
     25 		return -1;
     26 	}
     27 
     28 	// print the string to the buffer
     29 	int cnt = vprintfmt((void*)sprintputch, &b, fmt, ap);
     30 
     31 	// null terminate the buffer
     32 	*b.buf = '\0';
     33 
     34 	return cnt;
     35 }
     36 
     37 int
     38 sprintf(char *buf, const char *fmt, ...)
     39 {
     40 	va_list ap;
     41 	int rc;
     42 
     43 	va_start(ap, fmt);
     44 	rc = vsprintf(buf, fmt, ap);
     45 	va_end(ap);
     46 
     47 	return rc;
     48 }
     49