pkgconfig.cc
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00001 #include <utilmm/system/system.hh>
00002 #include <utilmm/system/process.hh>
00003 #include <utilmm/configfile/pkgconfig.hh>
00004 #include <utilmm/configfile/exceptions.hh>
00005 #include <utilmm/stringtools.hh>
00006 
00007 using namespace utilmm;
00008 using std::string;
00009 using std::list;
00010 
00011 pkgconfig::pkgconfig(string const& name_)
00012     : m_name(name_)
00013 {
00014     if(!exists(name_))
00015         throw not_found(name_);
00016 }
00017 
00018 pkgconfig::~pkgconfig() {}
00019 
00020 std::list<string> pkgconfig::packages()
00021 {
00022     process prs;
00023     prs << "pkg-config" << "--list-all";
00024     string output = run(prs);
00025     // strip output
00026     string::size_type first = output.find_first_not_of(" \t\n");
00027     if (first == string::npos) output = string();
00028     string::size_type last  = output.find_last_not_of(" \t\n");
00029     if (last == string::npos) output = string(output, first);
00030 
00031     string out = string(output, first, last - first + 1);
00032     std::list<string> lines = split(out, "\n");
00033     // remove the package descriptions
00034     for (list<string>::iterator it = lines.begin(); it != lines.end(); ++it)
00035     {
00036         list<string> fields = split(*it, " ");
00037         *it = fields.front();
00038     }
00039 
00040     return lines;
00041 }
00042 
00043 string pkgconfig::name() const { return m_name; }
00044 string pkgconfig::version() const { return run("--modversion"); }
00045 
00046 bool pkgconfig::exists(string const& name)
00047 {
00048     process prs;
00049     prs << "pkg-config" << "--exists" << name;
00050 
00051     try { run(prs); return true; } 
00052     catch(not_found) { return false; }
00053 }
00054 
00055 string pkgconfig::get(string const& varname, string const& defval) const
00056 {
00057     try { return run("--variable=" + varname); }
00058     catch(pkgconfig_error) { return defval; } // pkg-config 0.19 crashes when varname does not exist ...
00059     catch(not_found) { return defval; }
00060 }
00061 
00062 static const char* const compiler_flags[] = { "--cflags", "--cflags-only-I", "--cflags-only-other" };
00063 string pkgconfig::compiler(Modes mode) const
00064 { return run(compiler_flags[mode]); }
00065 
00066 static const char* const linker_flags[] = { "--libs", "--libs-only-L", "--libs-only-other", "--static", "--libs-only-l",  };
00067 string pkgconfig::linker(Modes mode) const
00068 { return run(linker_flags[mode]); }
00069 
00070 
00071 
00072 
00073 #include <iostream>
00074 string pkgconfig::run(string const& argument) const
00075 {
00076     process prs;
00077     prs << "pkg-config" << argument << m_name;
00078     string output = run(prs);
00079     // strip output
00080     string::size_type first = output.find_first_not_of(" \t\n");
00081     if (first == string::npos) return string();
00082     string::size_type last  = output.find_last_not_of(" \t\n");
00083     if (last == string::npos) return string(output, first);
00084     return string(output, first, last - first + 1);
00085 }
00086 
00087 string pkgconfig::run(process& prs)
00088 {
00089     int pipeno[2];
00090     pipe(pipeno);
00091 
00092     prs.redirect_to(process::Stdout, pipeno[1]);
00093     prs.redirect_to(process::Stderr, "/dev/null");
00094     prs.start();
00095 
00096     string output;
00097     while(true) 
00098     {
00099         char buffer[256];
00100         int read_count = read(pipeno[0], buffer, 256);
00101         if (read_count == -1)
00102             throw unix_error();
00103         if (read_count == 0)  break;
00104         output += string(buffer, read_count);
00105     }
00106     prs.wait();
00107 
00108     if (!prs.exit_normal()) 
00109         throw pkgconfig_error();
00110     if (prs.exit_status())  
00111         throw not_found(prs.cmdline().front());
00112 
00113     return output;
00114 }
00115 
00116 


utilmm
Author(s): Sylvain Joyeux/sylvain.joyeux@m4x.org
autogenerated on Wed Sep 16 2015 07:05:43