memalloc: Add growstackto helper

This patch adds the growstackto helper which repeatedly calls
growstackblock until the requested size is reached.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/memalloc.h b/src/memalloc.h
index 4b5be46..b348d9c 100644
--- a/src/memalloc.h
+++ b/src/memalloc.h
@@ -57,6 +57,7 @@ void setstackmark(struct stackmark *);
 void popstackmark(struct stackmark *);
 void growstackblock(void);
 void *growstackstr(void);
+char *growstackto(size_t len);
 char *makestrspace(size_t, char *);
 char *stnputs(const char *, size_t, char *);
 char *stputs(const char *, char *);