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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build darwin dragonfly freebsd hurd linux nacl netbsd openbsd solaris windows
#include "runtime.h"
#include "array.h"
#include "arch.h"
extern Slice runtime_get_envs(void);
String
runtime_getenv(const char *s)
{
int32 i, j;
intgo len;
const byte *v, *bs;
Slice envs;
String* envv;
int32 envc;
String ret;
bs = (const byte*)s;
len = runtime_findnull(bs);
envs = runtime_get_envs();
envv = (String*)envs.__values;
envc = envs.__count;
for(i=0; i<envc; i++){
if(envv[i].len <= len)
continue;
v = (const byte*)envv[i].str;
for(j=0; j<len; j++)
if(bs[j] != v[j])
goto nomatch;
if(v[len] != '=')
goto nomatch;
ret.str = v+len+1;
ret.len = envv[i].len-len-1;
return ret;
nomatch:;
}
ret.str = nil;
ret.len = 0;
return ret;
}
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