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