X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fstdio%2Fopen_wmemstream.c;h=b8ae4a790cae922149b4463a723601c9c22cfe2b;hb=1d5750b95c06913a1f18a995481276d698d20fae;hp=4d90cd971964f5f91f6dca091e2f2a0d82d4b934;hpb=7b9f57f207b51132f188f750161953b7baf32154;p=musl

diff --git a/src/stdio/open_wmemstream.c b/src/stdio/open_wmemstream.c
index 4d90cd97..b8ae4a79 100644
--- a/src/stdio/open_wmemstream.c
+++ b/src/stdio/open_wmemstream.c
@@ -3,6 +3,8 @@
 #include <errno.h>
 #include <limits.h>
 #include <string.h>
+#include <stdlib.h>
+#include "libc.h"
 
 struct cookie {
 	wchar_t **bufp;
@@ -14,6 +16,12 @@ struct cookie {
 	mbstate_t mbs;
 };
 
+struct wms_FILE {
+	FILE f;
+	struct cookie c;
+	unsigned char buf[1];
+};
+
 static off_t wms_seek(FILE *f, off_t off, int whence)
 {
 	ssize_t base;
@@ -32,8 +40,12 @@ fail:
 static size_t wms_write(FILE *f, const unsigned char *buf, size_t len)
 {
 	struct cookie *c = f->cookie;
-	size_t len2;
+	size_t len2 = f->wpos - f->wbase;
 	wchar_t *newbuf;
+	if (len2) {
+		f->wpos = f->wbase;
+		if (wms_write(f, f->wbase, len2) < len2) return 0;
+	}
 	if (len + c->pos >= c->space) {
 		len2 = 2*c->space+1 | c->pos+len+1;
 		if (len2 > SSIZE_MAX/4) return 0;
@@ -59,34 +71,36 @@ static int wms_close(FILE *f)
 
 FILE *open_wmemstream(wchar_t **bufp, size_t *sizep)
 {
-	FILE *f;
-	struct cookie *c;
+	struct wms_FILE *f;
 	wchar_t *buf;
 
-	if (!(f=malloc(sizeof *f + sizeof *c))) return 0;
+	if (!(f=malloc(sizeof *f))) return 0;
 	if (!(buf=malloc(sizeof *buf))) {
 		free(f);
 		return 0;
 	}
-	memset(f, 0, sizeof *f + sizeof *c);
-	f->cookie = c = (void *)(f+1);
+	memset(&f->f, 0, sizeof f->f);
+	memset(&f->c, 0, sizeof f->c);
+	f->f.cookie = &f->c;
 
-	c->bufp = bufp;
-	c->sizep = sizep;
-	c->pos = c->len = c->space = *sizep = 0;
-	c->buf = *bufp = buf;
+	f->c.bufp = bufp;
+	f->c.sizep = sizep;
+	f->c.pos = f->c.len = f->c.space = *sizep = 0;
+	f->c.buf = *bufp = buf;
 	*buf = 0;
 
-	f->flags = F_NORD;
-	f->fd = -1;
-	f->buf = (void *)(c+1);
-	f->buf_size = 0;
-	f->lbf = EOF;
-	f->write = wms_write;
-	f->seek = wms_seek;
-	f->close = wms_close;
+	f->f.flags = F_NORD;
+	f->f.fd = -1;
+	f->f.buf = f->buf;
+	f->f.buf_size = 0;
+	f->f.lbf = EOF;
+	f->f.write = wms_write;
+	f->f.seek = wms_seek;
+	f->f.close = wms_close;
+
+	if (!libc.threaded) f->f.lock = -1;
 
-	if (!libc.threaded) f->lock = -1;
+	fwide(&f->f, 1);
 
-	return __ofl_add(f);
+	return __ofl_add(&f->f);
 }