本文整理汇总了C++中nsAutoCString::IsEmpty方法的典型用法代码示例。如果您正苦于以下问题：C++ nsAutoCString::IsEmpty方法的具体用法？C++ nsAutoCString::IsEmpty怎么用？C++ nsAutoCString::IsEmpty使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类nsAutoCString的用法示例。
在下文中一共展示了nsAutoCString::IsEmpty方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: PerformAsyncLaunchInternal
bool
GeckoChildProcessHost::PerformAsyncLaunch(std::vector<std::string> aExtraOpts, base::ProcessArchitecture arch)
{
// If NSPR log files are not requested, we're done.
const char* origNSPRLogName = PR_GetEnv("NSPR_LOG_FILE");
const char* origMozLogName = PR_GetEnv("MOZ_LOG_FILE");
if (!origNSPRLogName && !origMozLogName) {
return PerformAsyncLaunchInternal(aExtraOpts, arch);
}
++mChildCounter;
// remember original value so we can restore it.
// - Note: this code is not called re-entrantly, nor are restoreOrig*LogName
// or mChildCounter touched by any other thread, so this is safe.
static nsAutoCString restoreOrigNSPRLogName;
static nsAutoCString restoreOrigMozLogName;
if (origNSPRLogName) {
if (restoreOrigNSPRLogName.IsEmpty()) {
restoreOrigNSPRLogName.AssignLiteral("NSPR_LOG_FILE=");
restoreOrigNSPRLogName.Append(origNSPRLogName);
}
SetChildLogName("NSPR_LOG_FILE=", origNSPRLogName);
}
if (origMozLogName) {
if (restoreOrigMozLogName.IsEmpty()) {
restoreOrigMozLogName.AssignLiteral("MOZ_LOG_FILE=");
restoreOrigMozLogName.Append(origMozLogName);
}
SetChildLogName("MOZ_LOG_FILE=", origMozLogName);
}
bool retval = PerformAsyncLaunchInternal(aExtraOpts, arch);
// Revert to original value
if (origNSPRLogName) {
PR_SetEnv(restoreOrigNSPRLogName.get());
}
if (origMozLogName) {
PR_SetEnv(restoreOrigMozLogName.get());
}
return retval;
}示例2:
// Charset used by the file system.
const char * nsMsgI18NFileSystemCharset()
{
/* Get a charset used for the file. */
static nsAutoCString fileSystemCharset;
if (fileSystemCharset.IsEmpty())
{
nsresult rv;
nsCOMPtr <nsIPlatformCharset> platformCharset = do_GetService(NS_PLATFORMCHARSET_CONTRACTID, &rv);
if (NS_SUCCEEDED(rv)) {
rv = platformCharset->GetCharset(kPlatformCharsetSel_FileName,
fileSystemCharset);
}
if (NS_FAILED(rv))
fileSystemCharset.Assign("ISO-8859-1");
}
return fileSystemCharset.get();
}