src/console/vsprintf.c

   1 /*
   2  *  linux/lib/vsprintf.c
   3  *
   4  *  Copyright (C) 1991, 1992  Linus Torvalds
   5  */
   6
   7 /* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
   8 /*
   9  * Wirzenius wrote this portably, Torvalds fucked it up :-)
  10  */
  11 #include <stdarg.h>
  12 #include <string.h>
  13
  14 int vtxprintf(void (*tx_byte)(unsigned char byte), const char *fmt, va_list args);
  15
  16 /* FIXME this global makes vsprintf non-reentrant */
  17
  18 static char *str_buf;
  19 static void str_tx_byte(unsigned char byte)
  20 {
  21         *str_buf = byte;
  22         str_buf++;
  23 }
  24
  25 int vsprintf(char * buf, const char *fmt, va_list args)
  26 {
  27         int i;
  28         str_buf = buf;
  29         i = vtxprintf(str_tx_byte, fmt, args);
  30         /* maeder/Ispiri -- The null termination was missing a deference */
  31         /*                  and was just zeroing out the pointer instead */
  32         *str_buf = '\0';
  33         return i;
  34 }
  35
  36 int sprintf(char * buf, const char *fmt, ...)
  37 {
  38         va_list args;
  39         int i;
  40
  41         va_start(args, fmt);
  42         i=vsprintf(buf,fmt,args);
  43         va_end(args);
  44         return i;
  45 }