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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 linux netbsd openbsd windows
#include "runtime.h"
Slice syscall·envs;
byte*
runtime·getenv(int8 *s)
{
int32 i, j;
intgo len;
byte *v, *bs;
String* envv;
int32 envc;
bs = (byte*)s;
len = runtime·findnull(bs);
envv = (String*)syscall·envs.array;
envc = syscall·envs.len;
for(i=0; i<envc; i++){
if(envv[i].len <= len)
continue;
v = envv[i].str;
for(j=0; j<len; j++)
if(bs[j] != v[j])
goto nomatch;
if(v[len] != '=')
goto nomatch;
return v+len+1;
nomatch:;
}
return nil;
}
void (*_cgo_setenv)(byte**);
// Update the C environment if cgo is loaded.
// Called from syscall.Setenv.
void
syscall·setenv_c(String k, String v)
{
byte *arg[2];
if(_cgo_setenv == nil)
return;
arg[0] = runtime·malloc(k.len + 1);
runtime·memmove(arg[0], k.str, k.len);
arg[0][k.len] = 0;
arg[1] = runtime·malloc(v.len + 1);
runtime·memmove(arg[1], v.str, v.len);
arg[1][v.len] = 0;
runtime·asmcgocall((void*)_cgo_setenv, arg);
runtime·free(arg[0]);
runtime·free(arg[1]);
}
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