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livetrax/libs/glibmm2/glibmm/miscutils.cc

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// -*- c++ -*-
/* $Id$ */
/* Copyright (C) 2002 The gtkmm Development Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <cstddef>
#include <cstring>
#include <glibmm/miscutils.h>
#include <glibmm/utility.h>
#include <glib.h>
namespace Glib
{
Glib::ustring get_application_name()
{
if(const char *const application_name = g_get_application_name())
{
// Lets be a bit more strict than the original GLib function and ensure
// we always return valid UTF-8. gtkmm coders surely won't expect invalid
// UTF-8 in a Glib::ustring returned by a glibmm function.
if(g_utf8_validate(application_name, -1, 0))
return Glib::ustring(application_name);
char *const appname_utf8 = g_filename_to_utf8(application_name, -1, 0, 0, 0);
g_return_val_if_fail(appname_utf8 != 0, "");
return Glib::ustring(ScopedPtr<char>(appname_utf8).get());
}
return Glib::ustring();
}
void set_application_name(const Glib::ustring& application_name)
{
g_set_application_name(application_name.c_str());
}
std::string get_prgname()
{
const char *const prgname = g_get_prgname();
return (prgname) ? std::string(prgname) : std::string();
}
void set_prgname(const std::string& prgname)
{
g_set_prgname(prgname.c_str());
}
std::string getenv(const std::string& variable, bool& found)
{
const char *const value = g_getenv(variable.c_str());
found = (value != 0);
return (value) ? std::string(value) : std::string();
}
std::string getenv(const std::string& variable)
{
const char *const value = g_getenv(variable.c_str());
return (value) ? std::string(value) : std::string();
}
bool setenv(const std::string& variable, const std::string& value, bool overwrite)
{
return g_setenv(variable.c_str(), value.c_str(), overwrite);
}
void unsetenv(const std::string& variable)
{
g_unsetenv(variable.c_str());
}
std::string get_user_name()
{
return std::string(g_get_user_name());
}
std::string get_real_name()
{
return std::string(g_get_real_name());
}
std::string get_home_dir()
{
return std::string(g_get_home_dir());
}
std::string get_tmp_dir()
{
return std::string(g_get_tmp_dir());
}
std::string get_current_dir()
{
const ScopedPtr<char> buf (g_get_current_dir());
return std::string(buf.get());
}
bool path_is_absolute(const std::string& filename)
{
return g_path_is_absolute(filename.c_str());
}
std::string path_skip_root(const std::string& filename)
{
// g_path_skip_root() returns a pointer _into_ the argument string,
// or NULL if there was no root component.
if(const char *const ptr = g_path_skip_root(filename.c_str()))
return std::string(ptr);
else
return std::string();
}
std::string path_get_basename(const std::string& filename)
{
const ScopedPtr<char> buf (g_path_get_basename(filename.c_str()));
return std::string(buf.get());
}
std::string path_get_dirname(const std::string& filename)
{
const ScopedPtr<char> buf (g_path_get_dirname(filename.c_str()));
return std::string(buf.get());
}
std::string build_filename(const Glib::ArrayHandle<std::string>& elements)
{
return build_path(G_DIR_SEPARATOR_S, elements);
}
std::string build_filename(const std::string& elem1, const std::string& elem2)
{
const char *const elements[] = { elem1.c_str(), elem2.c_str(), 0 };
return build_path(G_DIR_SEPARATOR_S, elements);
}
/* Yes, this reimplements the functionality of g_build_path() -- because
* it takes a varargs list, and calling it several times would result
* in different behaviour.
*/
std::string build_path(const std::string& separator, const Glib::ArrayHandle<std::string>& elements)
{
std::string result;
result.reserve(256); //TODO: Explain why this magic number is useful. murrayc
const char *const sep = separator.c_str();
const size_t seplen = separator.length();
bool is_first = true;
bool have_leading = false;
const char* single_element = 0;
const char* last_trailing = 0;
const char *const *const elements_begin = elements.data();
const char *const *const elements_end = elements_begin + elements.size();
for(const char *const * pelement = elements_begin; pelement != elements_end; ++pelement)
{
const char* start = *pelement;
if(*start == '\0')
continue; // ignore empty elements
if(seplen != 0)
{
while(strncmp(start, sep, seplen) == 0)
start += seplen;
}
const char* end = start + strlen(start);
if(seplen != 0)
{
while(end >= start + seplen && strncmp(end - seplen, sep, seplen) == 0)
end -= seplen;
last_trailing = end;
while(last_trailing >= *pelement + seplen && strncmp(last_trailing - seplen, sep, seplen) == 0)
last_trailing -= seplen;
if(!have_leading)
{
// If the leading and trailing separator strings are in the
// same element and overlap, the result is exactly that element.
//
if(last_trailing <= start)
single_element = *pelement;
result.append(*pelement, start);
have_leading = true;
}
else
single_element = 0;
}
if(end == start)
continue;
if(!is_first)
result += separator;
result.append(start, end);
is_first = false;
}
if(single_element)
result = single_element;
else if(last_trailing)
result += last_trailing;
return result;
}
std::string find_program_in_path(const std::string& program)
{
if(char *const buf = g_find_program_in_path(program.c_str()))
return std::string(ScopedPtr<char>(buf).get());
else
return std::string();
}
} // namespace Glib