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adding a few utility methods to blah string

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This commit is contained in:
Noel Berry 2022-12-05 19:18:03 -08:00
parent 1e2a009778
commit 916ddc2020
2 changed files with 64 additions and 41 deletions
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81
include/blah_string.h
View File

@ -105,33 +105,43 @@ namespace Blah
return *this;
}
StackString operator+(const BaseString& rhs)
{
StackString str(*this);
str += rhs;
return str;
}
StackString operator+(const char* rhs)
{
StackString str(*this);
str += rhs;
return str;
}
StackString operator+(const char& rhs)
{
StackString str(*this);
str += rhs;
return str;
}
StackString substr(int start, int len = 0) const
{
if (len == 0) len = length() - start;
return StackString(cstr() + start, cstr() + start + len);
}
StackString replace(const StackString& term, const StackString& replacement) const
{
StackString result;
int term_length = term.length();
for (int i = 0, n = length() - term_length; i < n; i ++)
{
bool match = false;
for (int j = 0; j < term_length; j ++)
if (operator[](i) != term[j]) { match = true; break; }
if (match)
{
result.append(replacement);
i += term_length - 1;
}
else
result.append(operator[](i));
}
return result;
}
void set_length(int new_length)
{
new_length++;
if (s_len() < new_length)
append('\0', new_length - s_len());
else if (m_heap_buffer.size() > 0)
m_heap_buffer.erase(new_length, s_len() - new_length);
else
m_stack_buffer.erase(new_length, s_len() - new_length);
}
StackString trim() const
{
if (length() > 0)
@ -256,30 +266,37 @@ namespace Blah
StackVector<char, StackSize> m_stack_buffer;
};
template<size_t StackSize>
StackString<StackSize> operator+(const StackString<StackSize>& lhs, const BaseString& rhs)
template<size_t StackSizeLeft, size_t StackSizeRight>
StackString<StackSizeLeft> operator+(const StackString<StackSizeLeft>& lhs, const StackString<StackSizeRight>& rhs)
{
StackString str(lhs);
str += rhs;
return str;
StackString<StackSizeLeft> str(lhs); str.append(rhs); return str;
}
template<size_t StackSize>
StackString<StackSize> operator+(const char* lhs, const StackString<StackSize>& rhs)
{
StackString<StackSize> str(lhs); str.append(rhs); return str;
}
template<size_t StackSize>
StackString<StackSize> operator+(const StackString<StackSize>& lhs, const char* rhs)
{
StackString str(lhs);
str += rhs;
return str;
StackString<StackSize> str(lhs); str.append(rhs); return str;
}
template<size_t StackSize>
StackString<StackSize> operator+(const StackString<StackSize>& lhs, const char& rhs)
{
StackString str(lhs);
str += rhs;
return str;
StackString<StackSize> str(lhs); str.append(rhs); return str;
}
template<size_t StackSize>
StackString<StackSize> operator+(const char& lhs, const StackString<StackSize>& rhs)
{
StackString<StackSize> str(lhs); str.append(rhs); return str;
}
// Stores enough for an empty string on the stack, and afterwards allocates on the heap
using HeapString = StackString<1>;

22
src/blah_string.cpp
View File

@ -20,30 +20,36 @@ namespace
constexpr bool blah_compare_ignore_case(char a, char b) { return blah_to_lower(a) == blah_to_lower(b); };
constexpr bool blah_compare_with_case(char a, char b) { return a == b; };
#define BLAH_ASSERT_INPUT_STRING(input) \
BLAH_ASSERT(!(input >= cstr() && input < cstr() + length()), "Assigning string to itself is bad news!")
}
void BaseString::assign(const char* cstr, const char* cstr_end)
void BaseString::assign(const char* cstr_start, const char* cstr_end)
{
BLAH_ASSERT_INPUT_STRING(cstr_start);
s_clear();
append(cstr, cstr_end);
append(cstr_start, cstr_end);
}
void BaseString::append(const char* cstr, const char* cstr_end)
void BaseString::append(const char* cstr_start, const char* cstr_end)
{
BLAH_ASSERT_INPUT_STRING(cstr_start);
// make sure values are valid
if (cstr == nullptr || *cstr == '\0')
if (cstr_start == nullptr || *cstr_start == '\0')
return;
if (cstr_end == nullptr)
cstr_end = cstr + blah_strlen(cstr);
cstr_end = cstr_start + blah_strlen(cstr_start);
// reserve (+1 for null-terminator)
auto len = length();
s_ensure(len + (cstr_end - cstr) + 1);
s_ensure(len + (cstr_end - cstr_start) + 1);
// copy value over to our buffer
char* dst = s_ptr() + len;
while (cstr < cstr_end)
*(dst++) = *(cstr++);
while (cstr_start < cstr_end)
*(dst++) = *(cstr_start++);
}
void BaseString::append(const u16* u16_cstr, const u16* u16_cstr_end, bool swap_endian)