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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/linux_util.h"
#include <stdlib.h>
#include <vector>
#include "base/command_line.h"
#include "base/process_util.h"
#include "base/string_util.h"
namespace {
class EnvironmentVariableGetterImpl
: public base::EnvironmentVariableGetter {
public:
virtual bool Getenv(const char* variable_name, std::string* result) {
const char* env_value = ::getenv(variable_name);
if (env_value) {
// Note that the variable may be defined but empty.
*result = env_value;
return true;
}
// Some commonly used variable names are uppercase while others
// are lowercase, which is inconsistent. Let's try to be helpful
// and look for a variable name with the reverse case.
char first_char = variable_name[0];
std::string alternate_case_var;
if (first_char >= 'a' && first_char <= 'z')
alternate_case_var = StringToUpperASCII(std::string(variable_name));
else if (first_char >= 'A' && first_char <= 'Z')
alternate_case_var = StringToLowerASCII(std::string(variable_name));
else
return false;
env_value = ::getenv(alternate_case_var.c_str());
if (env_value) {
*result = env_value;
return true;
}
return false;
}
};
} // anonymous namespace
namespace base {
uint8_t* BGRAToRGBA(const uint8_t* pixels, int width, int height, int stride) {
if (stride == 0)
stride = width * 4;
uint8_t* new_pixels = static_cast<uint8_t*>(malloc(height * stride));
// We have to copy the pixels and swap from BGRA to RGBA.
for (int i = 0; i < height; ++i) {
for (int j = 0; j < width; ++j) {
int idx = i * stride + j * 4;
new_pixels[idx] = pixels[idx + 2];
new_pixels[idx + 1] = pixels[idx + 1];
new_pixels[idx + 2] = pixels[idx];
new_pixels[idx + 3] = pixels[idx + 3];
}
}
return new_pixels;
}
// We use this static string to hold the Linux distro info. If we
// crash, the crash handler code will send this in the crash dump.
std::string linux_distro = "Unknown";
std::string GetLinuxDistro() {
static bool checked_distro = false;
if (!checked_distro) {
std::vector<std::string> argv;
argv.push_back("lsb_release");
argv.push_back("-d");
std::string output;
base::GetAppOutput(CommandLine(argv), &output);
if (output.length() > 0) {
// lsb_release -d should return: Description:<tab>Distro Info
static const std::string field = "Description:\t";
if (output.compare(0, field.length(), field) == 0)
linux_distro = output.substr(field.length());
}
// We do this check only once per process. If it fails, there's
// little reason to believe it will work if we attempt to run
// lsb_release again.
checked_distro = true;
}
return linux_distro;
}
// static
EnvironmentVariableGetter* EnvironmentVariableGetter::Create() {
return new EnvironmentVariableGetterImpl();
}
DesktopEnvironment GetDesktopEnvironment(EnvironmentVariableGetter* env) {
std::string desktop_session;
if (env->Getenv("DESKTOP_SESSION", &desktop_session)) {
if (desktop_session == "gnome")
return DESKTOP_ENVIRONMENT_GNOME;
else if (desktop_session.substr(3) == "kde") // kde3 or kde4
return DESKTOP_ENVIRONMENT_KDE;
}
// Fall back on some older environment variables.
// Useful particularly in the DESKTOP_SESSION=default case.
std::string dummy;
if (env->Getenv("GNOME_DESKTOP_SESSION_ID", &dummy)) {
return DESKTOP_ENVIRONMENT_GNOME;
} else if (env->Getenv("KDE_FULL_SESSION", &dummy)) {
return DESKTOP_ENVIRONMENT_KDE;
}
return DESKTOP_ENVIRONMENT_OTHER;
}
} // namespace base
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