本文整理汇总了C++中StringA::AllocateBuffer方法的典型用法代码示例。如果您正苦于以下问题：C++ StringA::AllocateBuffer方法的具体用法？C++ StringA::AllocateBuffer怎么用？C++ StringA::AllocateBuffer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StringA的用法示例。
在下文中一共展示了StringA::AllocateBuffer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: SystemException
/*
* vislib::sys::Path::GetUserHomeDirectoryA
*/
vislib::StringA vislib::sys::Path::GetUserHomeDirectoryA(void) {
#ifdef _WIN32
StringA retval;
if (FAILED(::SHGetFolderPathA(NULL, CSIDL_PERSONAL, NULL, 0,
retval.AllocateBuffer(MAX_PATH)))) {
throw SystemException(ERROR_NOT_FOUND, __FILE__, __LINE__);
}
#else /* _WIN32 */
char *path = getenv("HOME"); // Crowbar
if (path == NULL) {
throw SystemException(ENOENT, __FILE__, __LINE__);
}
StringA retval(path);
#endif /* _WIN32 */
if (!retval.EndsWith(SEPARATOR_A)) {
retval += SEPARATOR_A;
}
return retval;
}示例2: DOUBLE_SEPARATOR
/*
* vislib::sys::Path::Canonicalise
*/
vislib::StringA vislib::sys::Path::Canonicalise(const StringA& path) {
const StringA DOUBLE_SEPARATOR(Path::SEPARATOR_A, 2);
#ifdef _WIN32
StringA retval;
if (::PathCanonicalizeA(retval.AllocateBuffer(MAX_PATH), path) != TRUE) {
throw SystemException(__FILE__, __LINE__);
}
retval.Replace(DOUBLE_SEPARATOR.PeekBuffer(), SEPARATOR_A);
retval.Replace(DOUBLE_SEPARATOR.PeekBuffer(), SEPARATOR_A);
/* Ensure that a UNC path remains a UNC path. */
if (path.StartsWith(DOUBLE_SEPARATOR)) {
// Note: Double separator replacement above leaves at least one
// separator, so we must only prepend one additional one.
retval.Prepend(SEPARATOR_A);
}
return retval;
#else /* _WIN32 */
const char *BACK_REF = "/..";
const char *CUR_REF = "/."; // Note: "./" does not work
StringA::Size BACK_REF_LEN = ::strlen(BACK_REF);
StringA::Size bwRefPos = 0; // Position of back reference.
StringA::Size remDirPos = 0; // Position of directory to erase.
StringA retval(path);
/* Remove backward references, first. */
while ((bwRefPos = retval.Find(BACK_REF)) != StringA::INVALID_POS) {
if ((bwRefPos > 0)
&& (remDirPos = retval.FindLast(SEPARATOR_A, bwRefPos - 1))
!= StringA::INVALID_POS) {
/* Found inner backward reference, so remove some parts. */
retval.Remove(remDirPos, bwRefPos - remDirPos + BACK_REF_LEN);
} else {
/*
* No other path separator is before this one, so we can remove
* everything before 'bwRefPos'.
*/
retval.Remove(0, bwRefPos + BACK_REF_LEN);
}
}
/*
* Remove references to the current directory. This must be done after
* removing backward references.
*/
retval.Remove(CUR_REF);
/* Remove odd and even number of repeated path separators. */
retval.Replace(DOUBLE_SEPARATOR.PeekBuffer(), SEPARATOR_A);
retval.Replace(DOUBLE_SEPARATOR.PeekBuffer(), SEPARATOR_A);
return retval;
#endif /* _WIN32 */
}