X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fstdio%2Fvfprintf.c;h=f13fbe10576d157684ecfc9d4e8bcf448010cd6d;hb=a0b56b947a5a8a58fe2accea7f6d9ee927d70ad4;hp=b6bb3bcf481936113e5453e9ab7d03d3ac7ae14d;hpb=9ae8d5fc71a4b61ec826d58f03f7b543755fb1d4;p=musl

diff --git a/src/stdio/vfprintf.c b/src/stdio/vfprintf.c
index b6bb3bcf..f13fbe10 100644
--- a/src/stdio/vfprintf.c
+++ b/src/stdio/vfprintf.c
@@ -193,7 +193,7 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t)
 	uint32_t *a, *d, *r, *z;
 	int e2=0, e, i, j, l;
 	char buf[9+LDBL_MANT_DIG/4], *s;
-	const char *prefix="-+ ";
+	const char *prefix="-0X+0X 0X-0x+0x 0x";
 	int pl;
 	char ebuf0[3*sizeof(int)], *ebuf=&ebuf0[3*sizeof(int)], *estr;
 
@@ -201,10 +201,10 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t)
 	if (y<0 || 1/y<0) {
 		y=-y;
 	} else if (fl & MARK_POS) {
-		prefix++;
+		prefix+=3;
 	} else if (fl & PAD_POS) {
-		prefix+=2;
-	} else pl=0;
+		prefix+=6;
+	} else prefix++, pl=0;
 
 	if (!isfinite(y)) {
 		char *s = (t&32)?"inf":"INF";
@@ -223,15 +223,23 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t)
 		long double round = 8.0;
 		int re;
 
+		if (t&32) prefix += 9;
+		pl += 2;
+
 		if (p<0 || p>=LDBL_MANT_DIG/4-1) re=0;
 		else re=LDBL_MANT_DIG/4-1-p;
 
 		if (re) {
-			if (pl && *prefix=='-') y=-y;
 			while (re--) round*=16;
-			y+=round;
-			y-=round;
-			if (y<0) y=-y;
+			if (*prefix=='-') {
+				y=-y;
+				y-=round;
+				y+=round;
+				y=-y;
+			} else {
+				y+=round;
+				y-=round;
+			}
 		}
 
 		estr=fmt_u(e2<0 ? -e2 : e2, ebuf);
@@ -240,17 +248,17 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t)
 		*--estr = t+('p'-'a');
 
 		s=buf;
-		*s++='0';
-		*s++=t+('x'-'a');
 		do {
 			int x=y;
 			*s++=xdigits[x]|(t&32);
 			y=16*(y-x);
-			if (s-buf==3 && (y||p>0||(fl&ALT_FORM))) *s++='.';
+			if (s-buf==1 && (y||p>0||(fl&ALT_FORM))) *s++='.';
 		} while (y);
 
-		if (p<0) p = s-buf-4;
-		l = 1 + p + (p || (fl&ALT_FORM)) + ebuf-estr;
+		if (p && s-buf-2 < p)
+			l = (p+2) + (ebuf-estr);
+		else
+			l = (s-buf) + (ebuf-estr);
 
 		pad(f, ' ', w, pl+l, fl);
 		out(f, prefix, pl);
@@ -258,12 +266,12 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t)
 		out(f, buf, s-buf);
 		pad(f, '0', l-(ebuf-estr)-(s-buf), 0, 0);
 		out(f, estr, ebuf-estr);
-		pad(f, '0', w, pl+l, fl^LEFT_ADJ);
+		pad(f, ' ', w, pl+l, fl^LEFT_ADJ);
 		return MAX(w, pl+l);
 	}
 	if (p<0) p=6;
 
-	y *= 0x1p28; e2-=28;
+	if (y) y *= 0x1p28, e2-=28;
 
 	if (e2<0) a=r=z=big;
 	else a=r=z=big+sizeof(big)/sizeof(*big) - LDBL_MANT_DIG - 1;
@@ -305,7 +313,7 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t)
 	else e=0;
 
 	/* Perform rounding: j is precision after the radix (possibly neg) */
-	j = p - ((t|32)!='f')*e - ((t|32)=='g');
+	j = p - ((t|32)!='f')*e - ((t|32)=='g' && p);
 	if (j < 9*(z-r-1)) {
 		uint32_t x;
 		/* We avoid C's broken division of negative numbers */
@@ -318,13 +326,15 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t)
 		if (x || d+1!=z) {
 			long double round = CONCAT(0x1p,LDBL_MANT_DIG);
 			long double small;
-			if (x<i/2) small=0x01p-1;
-			else if (i==i/2 && d+1==z) small=0x10p-1;
-			else small=0x11p-1;
+			if (*d/i & 1) round += 2;
+			if (x<i/2) small=0x0.8p0;
+			else if (x==i/2 && d+1==z) small=0x1.0p0;
+			else small=0x1.8p0;
 			if (pl && *prefix=='-') round*=-1, small*=-1;
+			*d -= x;
 			/* Decide whether to round by probing round+small */
 			if (round+small != round) {
-				*d = *d - x + i;
+				*d = *d + i;
 				while (*d > 999999999) {
 					*d--=0;
 					(*d)++;
@@ -333,6 +343,7 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t)
 				for (i=10, e=9*(r-a); *a>=i; i*=10, e++);
 			}
 		}
+		if (z>d+1) z=d+1;
 		for (; !z[-1] && z>a; z--);
 	}
 	
@@ -347,7 +358,7 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t)
 		}
 		if (!(fl&ALT_FORM)) {
 			/* Count trailing zeros in last place */
-			if (z>a) for (i=10, j=0; z[-1]%i==0; i*=10, j++);
+			if (z>a && z[-1]) for (i=10, j=0; z[-1]%i==0; i*=10, j++);
 			else j=9;
 			if ((t|32)=='f')
 				p = MIN(p,MAX(0,9*(z-r-1)-j));
@@ -434,7 +445,7 @@ static int printf_core(FILE *f, const char *fmt, va_list *ap, union arg *nl_arg,
 		/* Update output count, end loop when fmt is exhausted */
 		if (cnt >= 0) {
 			if (l > INT_MAX - cnt) {
-				if (!ferror(f)) errno = EOVERFLOW;
+				errno = EOVERFLOW;
 				cnt = -1;
 			} else cnt += l;
 		}
@@ -625,15 +636,28 @@ static int printf_core(FILE *f, const char *fmt, va_list *ap, union arg *nl_arg,
 int vfprintf(FILE *f, const char *fmt, va_list ap)
 {
 	va_list ap2;
-	int nl_type[NL_ARGMAX] = {0};
-	union arg nl_arg[NL_ARGMAX];
+	int nl_type[NL_ARGMAX+1] = {0};
+	union arg nl_arg[NL_ARGMAX+1];
+	unsigned char internal_buf[80], *saved_buf = 0;
 	int ret;
 
 	va_copy(ap2, ap);
 	if (printf_core(0, fmt, &ap2, nl_arg, nl_type) < 0) return -1;
 
 	FLOCK(f);
+	if (!f->buf_size) {
+		saved_buf = f->buf;
+		f->buf = internal_buf;
+		f->buf_size = sizeof internal_buf;
+	}
 	ret = printf_core(f, fmt, &ap2, nl_arg, nl_type);
+	if (saved_buf) {
+		f->write(f, 0, 0);
+		if (!f->wpos) ret = -1;
+		f->buf = saved_buf;
+		f->buf_size = 0;
+		f->wpos = f->wbase = f->wend = 0;
+	}
 	FUNLOCK(f);
 	va_end(ap2);
 	return ret;