set stream orientations in open_[w]memstream

[oweals/musl.git] / src / stdio / open_memstream.c

diff --git a/src/stdio/open_memstream.c b/src/stdio/open_memstream.c
index 9eafdfbaedce42c1bc86165719638e5e335f822e..40f5ad60caf986e253aa7241be726248b58a806c 100644 (file)
--- a/src/stdio/open_memstream.c
+++ b/src/stdio/open_memstream.c
@@ -12,6 +12,12 @@ struct cookie {
        size_t space;
 };
 
+struct ms_FILE {
+       FILE f;
+       struct cookie c;
+       unsigned char buf[BUFSIZ];
+};
+
 static off_t ms_seek(FILE *f, off_t off, int whence)
 {
        ssize_t base;
@@ -57,33 +63,35 @@ static int ms_close(FILE *f)
 
 FILE *open_memstream(char **bufp, size_t *sizep)
 {
-       FILE *f;
-       struct cookie *c;
-       if (!(f=malloc(sizeof *f + sizeof *c + BUFSIZ))) return 0;
-       memset(f, 0, sizeof *f + sizeof *c);
-       f->cookie = c = (void *)(f+1);
+       struct ms_FILE *f;
+       char *buf;
 
-       c->bufp = bufp;
-       c->sizep = sizep;
-       c->pos = c->len = c->space = 0;
-       c->buf = 0;
+       if (!(f=malloc(sizeof *f))) return 0;
+       if (!(buf=malloc(sizeof *buf))) {
+               free(f);
+               return 0;
+       }
+       memset(&f->f, 0, sizeof f->f);
+       memset(&f->c, 0, sizeof f->c);
+       f->f.cookie = &f->c;
 
-       f->flags = F_NORD;
-       f->fd = -1;
-       f->buf = (void *)(c+1);
-       f->buf_size = BUFSIZ;
-       f->lbf = EOF;
-       f->write = ms_write;
-       f->seek = ms_seek;
-       f->close = ms_close;
+       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;
 
-       if (!libc.threaded) f->lock = -1;
+       f->f.flags = F_NORD;
+       f->f.fd = -1;
+       f->f.buf = f->buf;
+       f->f.buf_size = sizeof f->buf;
+       f->f.lbf = EOF;
+       f->f.write = ms_write;
+       f->f.seek = ms_seek;
+       f->f.close = ms_close;
+       f->f.mode = -1;
 
-       OFLLOCK();
-       f->next = libc.ofl_head;
-       if (libc.ofl_head) libc.ofl_head->prev = f;
-       libc.ofl_head = f;
-       OFLUNLOCK();
+       if (!libc.threaded) f->f.lock = -1;
 
-       return f;
+       return __ofl_add(&f->f);
 }