From 5c670acb1fdd04dcb9c220fee7cbeeb6b0c440e5 Mon Sep 17 00:00:00 2001
From: Damien George <damien.p.george@gmail.com>
Date: Sat, 24 Jan 2015 23:12:58 +0000
Subject: [PATCH] py: Be more machine-portable with size of bit fields.

---
 py/mpz.h   | 2 +-
 py/parse.c | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/py/mpz.h b/py/mpz.h
index d2b6fad5c..d52e58b0c 100644
--- a/py/mpz.h
+++ b/py/mpz.h
@@ -69,7 +69,7 @@ typedef int32_t mpz_dbl_dig_signed_t;
 typedef struct _mpz_t {
     mp_uint_t neg : 1;
     mp_uint_t fixed_dig : 1;
-    mp_uint_t alloc : 30;
+    mp_uint_t alloc : BITS_PER_WORD - 2;
     mp_uint_t len;
     mpz_dig_t *dig;
 } mpz_t;
diff --git a/py/parse.c b/py/parse.c
index dc2780c7e..881a11e73 100644
--- a/py/parse.c
+++ b/py/parse.c
@@ -108,9 +108,9 @@ STATIC const rule_t *rules[] = {
 };
 
 typedef struct _rule_stack_t {
-    mp_uint_t src_line : 24;
-    mp_uint_t rule_id : 8;
-    mp_uint_t arg_i : 32; // what should the bit-size be?
+    mp_uint_t src_line : BITS_PER_WORD - 8; // maximum bits storing source line number
+    mp_uint_t rule_id : 8; // this must be large enough to fit largest rule number
+    mp_uint_t arg_i; // this dictates the maximum nodes in a "list" of things
 } rule_stack_t;
 
 typedef struct _parser_t {
-- 
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