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Improve memory reserve policy for Clipboard/ImGuiBuffer

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This commit is contained in:
ocornut
2015-01-14 13:04:33 +00:00
parent 3a20671802
commit a372d67f47
1 changed files with 10 additions and 4 deletions
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14
imgui.cpp
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@@ -1195,11 +1195,16 @@ void ImGuiTextBuffer::appendv(const char* fmt, va_list args)
int len = vsnprintf(NULL, 0, fmt, args); // FIXME-OPT: could do a first pass write attempt, likely successful on first pass. int len = vsnprintf(NULL, 0, fmt, args); // FIXME-OPT: could do a first pass write attempt, likely successful on first pass.
if (len <= 0) if (len <= 0)
return; return;
const size_t write_off = Buf.size();
if (write_off + (size_t)len >= Buf.capacity())
Buf.reserve(Buf.capacity() * 2);
Buf.resize(write_off + (size_t)len); const size_t write_off = Buf.size();
const size_t needed_sz = write_off + (size_t)len;
if (write_off + (size_t)len >= Buf.capacity())
{
const size_t double_capacity = Buf.capacity() * 2;
Buf.reserve(needed_sz > double_capacity ? needed_sz : double_capacity);
}
Buf.resize(needed_sz);
ImFormatStringV(&Buf[write_off] - 1, (size_t)len+1, fmt, args_copy); ImFormatStringV(&Buf[write_off] - 1, (size_t)len+1, fmt, args_copy);
} }
@@ -1844,6 +1849,7 @@ static void LogText(const ImVec2& ref_pos, const char* text, const char* text_en
const int tree_depth = (window->DC.TreeDepth - g.LogStartDepth); const int tree_depth = (window->DC.TreeDepth - g.LogStartDepth);
while (true) while (true)
{ {
// Split the string. Each new line (after a '\n') is followed by spacing corresponding to the current depth of our log entry.
const char* line_end = text_remaining; const char* line_end = text_remaining;
while (line_end < text_end) while (line_end < text_end)
if (*line_end == '\n') if (*line_end == '\n')