(TMP_DECL, TMP_ALLOC): New macros. When alloca is unavailable, they

work by allocating a fix amount of stack and imposing a hard limit on
what can be allocated. Updated all users of alloca.

Rev: src/nettle/bignum-random.c:1.4
Rev: src/nettle/cbc.c:1.8
Rev: src/nettle/dsa-keygen.c:1.7
Rev: src/nettle/hmac.c:1.6
Rev: src/nettle/pkcs1-rsa-md5.c:1.3
Rev: src/nettle/pkcs1-rsa-sha1.c:1.3
Rev: src/nettle/rsa-decrypt.c:1.5
Rev: src/nettle/rsa-encrypt.c:1.8
Rev: src/nettle/sexp.c:1.15

1 files changed, 4 insertions, 3 deletions

diff --git a/sexp.c b/sexp.c
index e6dce172..10992821 100644
--- a/sexp.c
+++ b/sexp.c
@@ -33,6 +33,7 @@
 #include "sexp.h"
 
 #include "macros.h"
+#include "nettle-internal.h"
 
 /* Initializes the iterator, but one has to call next to get to the
  * first element. */
@@ -324,11 +325,11 @@ sexp_iterator_assoc(struct sexp_iterator *iterator,
 		    const uint8_t **keys,
 		    struct sexp_iterator *values)
 {
-  int *found;
+  TMP_DECL(found, int, NETTLE_MAX_SEXP_ASSOC);
   unsigned nfound;
   unsigned i;
-  
-  found = alloca(nkeys * sizeof(*found));
+
+  TMP_ALLOC(found, nkeys);
   for (i = 0; i<nkeys; i++)
     found[i] = 0;