9base

revived minimalist port of Plan 9 userland to Unix
git clone git://git.suckless.org/9base
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bgetd.c (383B)

      1 #include "lib9.h"
      2 #include <bio.h>
      3 
      4 struct	bgetd
      5 {
      6 	Biobuf*	b;
      7 	int		eof;
      8 };
      9 
     10 static int
     11 Bgetdf(void *vp)
     12 {
     13 	int c;
     14 	struct bgetd *bg = vp;
     15 
     16 	c = Bgetc(bg->b);
     17 	if(c == Beof)
     18 		bg->eof = 1;
     19 	return c;
     20 }
     21 
     22 int
     23 Bgetd(Biobuf *bp, double *dp)
     24 {
     25 	double d;
     26 	struct bgetd b;
     27 
     28 	b.b = bp;
     29 	b.eof = 0;
     30 	d = fmtcharstod(Bgetdf, &b);
     31 	if(b.eof)
     32 		return -1;
     33 	Bungetc(bp);
     34 	*dp = d;
     35 	return 1;
     36 }