OwnedStringView: Add a method to extract a substring
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@ -5,6 +5,7 @@ class OwnedStringView
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{
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{
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public:
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public:
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OwnedStringView(char* c_str);
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OwnedStringView(char* c_str);
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OwnedStringView(char* c_str, usize length);
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OwnedStringView();
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OwnedStringView();
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OwnedStringView(OwnedStringView&&);
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OwnedStringView(OwnedStringView&&);
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OwnedStringView(const OwnedStringView&) = delete;
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OwnedStringView(const OwnedStringView&) = delete;
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@ -12,6 +13,8 @@ class OwnedStringView
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Result<OwnedStringView> clone() const;
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Result<OwnedStringView> clone() const;
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Result<OwnedStringView> substring(usize begin, usize size) const;
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static Result<OwnedStringView> from_string_literal(const char* str);
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static Result<OwnedStringView> from_string_literal(const char* str);
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const char* chars() const
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const char* chars() const
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@ -21,6 +21,12 @@ OwnedStringView::OwnedStringView(char* c_str)
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if (m_string) { m_length = strlen(m_string); }
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if (m_string) { m_length = strlen(m_string); }
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}
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}
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OwnedStringView::OwnedStringView(char* c_str, usize length)
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{
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m_string = c_str;
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m_length = length;
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}
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OwnedStringView::~OwnedStringView()
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OwnedStringView::~OwnedStringView()
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{
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{
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if (m_string) free_impl(m_string);
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if (m_string) free_impl(m_string);
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@ -31,6 +37,14 @@ Result<OwnedStringView> OwnedStringView::clone() const
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return from_string_literal(m_string);
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return from_string_literal(m_string);
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}
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}
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Result<OwnedStringView> OwnedStringView::substring(usize begin, usize size) const
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{
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if (begin + size >= size) return err(EINVAL);
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char* const dup = strndup(m_string + begin, size);
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if (!dup) return err(ENOMEM);
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return OwnedStringView { dup, size };
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}
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const char& OwnedStringView::operator[](usize index) const
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const char& OwnedStringView::operator[](usize index) const
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{
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{
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expect(index < m_length, "index out of range");
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expect(index < m_length, "index out of range");
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