1 files changed, 39 insertions, 0 deletions
diff --git a/test/gh1235.c b/test/gh1235.c
new file mode 100644
index 0000000..472282d
--- /dev/null
+++ b/test/gh1235.c
@@ -0,0 +1,39 @@
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+#include "zutil.h"
+
+int main(void) {
+    unsigned char plain[32];
+    unsigned char compressed[130];
+    PREFIX3(stream) strm;
+    int bound;
+    z_size_t bytes;
+
+    for (int i = 0; i <= 32; i++) {
+        memset(plain, 6, i);
+        memset(&strm, 0, sizeof(strm));
+        PREFIX(deflateInit2)(&strm, 0, 8, 31, 1, Z_DEFAULT_STRATEGY);
+        bound = PREFIX(deflateBound)(&strm, i);
+        strm.next_in = plain;
+        strm.next_out = compressed;
+        strm.avail_in = i;
+        strm.avail_out = sizeof(compressed);
+        if (PREFIX(deflate)(&strm, Z_FINISH) != Z_STREAM_END) return -1;
+        if (strm.avail_in != 0) return -1;
+        printf("bytes = %2i, deflateBound = %2i, total_out = %2zi\n", i, bound, strm.total_out);
+        if (bound < strm.total_out) return -1;
+        if (PREFIX(deflateEnd)(&strm) != Z_OK) return -1;
+    }
+    for (int i = 0; i <= 32; i++) {
+        bytes = sizeof(compressed);
+        for (int j = 0; j < i; j++) {
+            plain[j] = j;
+        }
+        bound = PREFIX(compressBound)(i);
+        if (PREFIX(compress2)(compressed, &bytes, plain, i, 1) != Z_OK) return -1;
+        printf("bytes = %2i, compressBound = %2i, total_out = %2zi\n", i, bound, (size_t)bytes);
+        if (bytes > bound) return -1;
+    }
+    return 0;
+}