mirror of
https://github.com/golang/go
synced 2024-11-23 00:00:07 -07:00
71 lines
1.5 KiB
Go
71 lines
1.5 KiB
Go
// Copyright 2009 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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package Platform
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import Utils "utils"
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// ----------------------------------------------------------------------------
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// Environment
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export var
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GOARCH,
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GOOS,
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GOROOT,
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USER string;
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func GetEnv(key string) string {
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n := len(key);
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for i := 0; i < sys.envc(); i++ {
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v := sys.envv(i);
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if n < len(v) && v[0 : n] == key && v[n] == '=' {
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return v[n + 1 : len(v)]; // +1: trim "="
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}
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}
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return "";
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}
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func init() {
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GOARCH = GetEnv("GOARCH");
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GOOS = GetEnv("GOOS");
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GOROOT = GetEnv("GOROOT");
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USER = GetEnv("USER");
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}
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// ----------------------------------------------------------------------------
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// I/O
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export const (
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MAGIC_obj_file = "@gri-go.7@v0"; // make it clear thar it cannot be a source file
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src_file_ext = ".go";
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obj_file_ext = ".7";
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)
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export func ReadObjectFile(filename string) (data string, ok bool) {
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data, ok = sys.readfile(filename + obj_file_ext);
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magic := MAGIC_obj_file; // TODO remove once len(constant) works
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if ok && len(data) >= len(magic) && data[0 : len(magic)] == magic {
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return data, ok;
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}
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return "", false;
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}
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export func ReadSourceFile(name string) (data string, ok bool) {
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name = Utils.TrimExt(name, src_file_ext) + src_file_ext;
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data, ok = sys.readfile(name);
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return data, ok;
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}
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export func WriteObjectFile(name string, data string) bool {
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name = Utils.TrimExt(Utils.BaseName(name), src_file_ext) + obj_file_ext;
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return sys.writefile(name, data);
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}
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