From d9e803fa14295c584c784c4244aab95de41eefdf Mon Sep 17 00:00:00 2001
From: Nick Bowler <nbowler@draconx.ca>
Date: Sun, 18 Mar 2012 18:05:05 -0400
Subject: [PATCH] Unbreak random array declarators.

Passing really big values to gsl_rng_uniform_int is not supported by the
library.  Instead, add a function to generate any possible uintmax_t
value uniformly at random.
---
 test/declgen.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/test/declgen.c b/test/declgen.c
index af7dd8d..d7bdbc1 100644
--- a/test/declgen.c
+++ b/test/declgen.c
@@ -20,6 +20,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <limits.h>
 #include <errno.h>
 #include <assert.h>
 #include <stdbool.h>
@@ -268,6 +269,20 @@ gen_declspecs(struct gen_rng *rng, unsigned flags)
 	return gen_randomize_specs(rng, s);
 }
 
+static uintmax_t gen_uintmax(struct gen_rng *rng)
+{
+	unsigned char tmp;
+	uintmax_t ret = 0;
+
+	for (size_t i = 0; i < sizeof ret; i++) {
+		tmp = gsl_rng_uniform_int(rng->rng, UCHAR_MAX+1);
+		ret <<= CHAR_BIT;
+		ret |= tmp;
+	}
+
+	return ret;
+}
+
 /*
  * Generate a random array declarator, selecting one of four possibilities
  * uniformly at random.
@@ -289,7 +304,7 @@ static void gen_array(struct gen_rng *rng, struct cdecl_declarator *d)
 		d->u.array.length = 0;
 		break;
 	case 3:
-		d->u.array.length = gsl_rng_uniform_int(rng->rng, -1);
+		d->u.array.length = gen_uintmax(rng);
 		break;
 	default:
 		assert(0);
-- 
2.43.2