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xo-object2: + DString methods

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This commit is contained in:
Roland Conybeare 2026-01-13 17:40:06 -05:00
commit 46bad19f7c
2 changed files with 29 additions and 0 deletions
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21
xo-object2/include/xo/object2/DString.hpp
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@ -48,6 +48,17 @@ namespace xo {
/** @defgroup dstring-access access methods **/
///@{
/** get writeable access to string representation.
* Caller responsible for calling fixup() if string length modified
**/
char * data() noexcept { return chars_; }
/** return char at position @p pos in this string, counting from zero.
* Does not check bounds. Undefined behavior if @p pos = @ref capacity_
**/
char & operator[](size_type pos) noexcept { return chars_[pos]; }
const char & operator[](size_type pos) const noexcept { return chars_[pos]; }
size_type capacity() const noexcept { return capacity_; }
size_type size() const noexcept { return size_; }
const char * chars() const noexcept { return chars_; }
@ -89,6 +100,11 @@ namespace xo {
// contains
// substr
/** recalculate string size if string contents modified without
* through side effects
**/
size_type fixup_size() noexcept;
///@}
/** @defgroup dstring-conversion-operators conversion operators **/
///@{
@ -108,12 +124,17 @@ namespace xo {
///@}
private:
/** @defgroup dstring-instance-variables instance variables **/
///@{
/** extent of @ref chars_ array **/
size_type capacity_ = 0;
/** null terminator at @c chars_[size_] **/
size_type size_ = 0;
/** string contents **/
char chars_[];
///@}
};
} /*namespace scm*/
} /*namespace xo*/

8
xo-object2/src/object2/DString.cpp
View file

@ -63,6 +63,14 @@ namespace xo {
return *this;
}
auto
DString::fixup_size() noexcept -> size_type
{
this->chars_[capacity_ - 1] = '\0';
this->size_ = ::strlen(chars_);
return this->size_;
}
} /*namespace scm*/
} /*namespace xo*/