add bsd fgetln function

[musl] / src / stdio / fgetln.c

diff --git a/src/stdio/fgetln.c b/src/stdio/fgetln.c
new file mode 100644 (file)
index 0000000..06b8883
--- /dev/null
+++ b/src/stdio/fgetln.c
@@ -0,0 +1,19 @@
+#include "stdio_impl.h"
+
+char *fgetln(FILE *f, size_t *plen)
+{
+       char *ret = 0, *z;
+       ssize_t l;
+       FLOCK(f);
+       ungetc(getc_unlocked(f), f);
+       if ((z=memchr(f->rpos, '\n', f->rend - f->rpos))) {
+               ret = (char *)f->rpos;
+               *plen = ++z - ret;
+               f->rpos = (void *)z;
+       } else if ((l = getline(&f->getln_buf, (size_t[]){0}, f)) > 0) {
+               *plen = l;
+               ret = f->getln_buf;
+       }
+       FUNLOCK(f);
+       return ret;
+}