From e3d72ccd150679e92c9bf21518a2a6d164ea4a29 Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Tue, 19 Aug 2014 14:48:13 -0700
Subject: Support brace-enclosed environment variable names

This makes it possible to append alpha-numeric characters directly to an
environment variable value, e.g. ${FOO}bar will use "FOO" as the variable name
and keep the "bar" as-is, whereas $FOObar will take "FOObar" as the variable
name.
---
 Alc/alcConfig.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Alc/alcConfig.c b/Alc/alcConfig.c
index 55f647e7..a7d36a84 100644
--- a/Alc/alcConfig.c
+++ b/Alc/alcConfig.c
@@ -38,6 +38,7 @@
 
 #include "alMain.h"
 #include "compat.h"
+#include "bool.h"
 
 
 typedef struct ConfigEntry {
@@ -137,13 +138,21 @@ static char *expdup(const char *str)
             }
             else
             {
+                bool hasbraces;
                 char envname[1024];
                 size_t k = 0;
 
+                hasbraces = (*str == '{');
+                if(hasbraces) str++;
+
                 while((isalnum(*str) || *str == '_') && k < sizeof(envname)-1)
                     envname[k++] = *(str++);
                 envname[k++] = '\0';
 
+                if(hasbraces && *str != '}')
+                    continue;
+
+                if(hasbraces) str++;
                 if((addstr=getenv(envname)) == NULL)
                     continue;
                 addstrlen = strlen(addstr);
-- 
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