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* Started implementing the new evaluation model.

Browse source 
* Lots of refactorings.
* Unit tests.
This commit is contained in:
Eelco Dolstra 2003-06-16 13:33:38 +00:00
parent b9f09b3268
commit 822794001c
15 changed files with 742 additions and 202 deletions
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54
src/util.cc
View file

@ -1,47 +1,55 @@
#include <iostream>
#include "util.hh"
string thisSystem = SYSTEM;
string nixHomeDir = "/nix";
string nixHomeDirEnvVar = "NIX";
string absPath(string filename, string dir)
SysError::SysError(string msg)
{
if (filename[0] != '/') {
char * sysMsg = strerror(errno);
err = msg + ": " + sysMsg;
}
string absPath(string path, string dir)
{
if (path[0] != '/') {
if (dir == "") {
char buf[PATH_MAX];
if (!getcwd(buf, sizeof(buf)))
throw Error("cannot get cwd");
throw SysError("cannot get cwd");
dir = buf;
}
filename = dir + "/" + filename;
path = dir + "/" + path;
/* !!! canonicalise */
char resolved[PATH_MAX];
if (!realpath(filename.c_str(), resolved))
throw Error("cannot canonicalise path " + filename);
filename = resolved;
if (!realpath(path.c_str(), resolved))
throw SysError("cannot canonicalise path " + path);
path = resolved;
}
return filename;
return path;
}
/* Return the directory part of the given path, i.e., everything
before the final `/'. */
string dirOf(string s)
string dirOf(string path)
{
unsigned int pos = s.rfind('/');
if (pos == string::npos) throw Error("invalid file name");
return string(s, 0, pos);
unsigned int pos = path.rfind('/');
if (pos == string::npos) throw Error("invalid file name: " + path);
return string(path, 0, pos);
}
/* Return the base name of the given path, i.e., everything following
the final `/'. */
string baseNameOf(string s)
string baseNameOf(string path)
{
unsigned int pos = s.rfind('/');
if (pos == string::npos) throw Error("invalid file name");
return string(s, pos + 1);
unsigned int pos = path.rfind('/');
if (pos == string::npos) throw Error("invalid file name: " + path);
return string(path, pos + 1);
}
void debug(string s)
{
cerr << "debug: " << s << endl;
}