From 68308908afbd1f04b17056d2be408c89b3578c86 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Fri, 12 Oct 2012 13:59:50 -0700
Subject: altos: Parameterize altitude table access and initialization

This allows projects to store the altitude data in different
representations or with different access modes.

By default, altitude data is stored in meters, but the initializers
include decimeter values so those can be used instead if desired.

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 src/core/ao_convert_pa.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'src/core')

diff --git a/src/core/ao_convert_pa.c b/src/core/ao_convert_pa.c
index 1413681d..2793b77c 100644
--- a/src/core/ao_convert_pa.c
+++ b/src/core/ao_convert_pa.c
@@ -19,10 +19,18 @@
 #include "ao.h"
 #endif
 
-static const int32_t altitude_table[] = {
+#ifndef AO_CONST_ATTRIB
+#define AO_CONST_ATTRIB
+#endif
+
+static const alt_t altitude_table[] AO_CONST_ATTRIB = {
 #include "altitude-pa.h"
 };
 
+#ifndef FETCH_ALT
+#define FETCH_ALT(o)	altitude_table[o]
+#endif
+
 #define ALT_SCALE	(1 << ALT_SHIFT)
 #define ALT_MASK	(ALT_SCALE - 1)
 
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