Method LoadIniSettingsFromMemory

tutorials/common/imgui/imgui.cpp:12433–12501

Zero-tolerance, no error reporting, cheap .ini parsing

// Zero-tolerance, no error reporting, cheap .ini parsing
void ImGui::LoadIniSettingsFromMemory(const char* ini_data, size_t ini_size)
{
    ImGuiContext& g = *GImGui;
    IM_ASSERT(g.Initialized);
    //IM_ASSERT(!g.WithinFrameScope && "Cannot be called between NewFrame() and EndFrame()");
    //IM_ASSERT(g.SettingsLoaded == false && g.FrameCount == 0);

    // For user convenience, we allow passing a non zero-terminated string (hence the ini_size parameter).
    // For our convenience and to make the code simpler, we'll also write zero-terminators within the buffer. So let's create a writable copy..
    if (ini_size == 0)
        ini_size = strlen(ini_data);
    g.SettingsIniData.Buf.resize((int)ini_size + 1);
    char* const buf = g.SettingsIniData.Buf.Data;
    char* const buf_end = buf + ini_size;
    memcpy(buf, ini_data, ini_size);
    buf_end[0] = 0;

    // Call pre-read handlers
    // Some types will clear their data (e.g. dock information) some types will allow merge/override (window)
    for (int handler_n = 0; handler_n < g.SettingsHandlers.Size; handler_n++)
        if (g.SettingsHandlers[handler_n].ReadInitFn)
            g.SettingsHandlers[handler_n].ReadInitFn(&g, &g.SettingsHandlers[handler_n]);

    void* entry_data = NULL;
    ImGuiSettingsHandler* entry_handler = NULL;

    char* line_end = NULL;
    for (char* line = buf; line < buf_end; line = line_end + 1)
    {
        // Skip new lines markers, then find end of the line
        while (*line == '\n' || *line == '\r')
            line++;
        line_end = line;
        while (line_end < buf_end && *line_end != '\n' && *line_end != '\r')
            line_end++;
        line_end[0] = 0;
        if (line[0] == ';')
            continue;
        if (line[0] == '[' && line_end > line && line_end[-1] == ']')
        {
            // Parse "[Type][Name]". Note that 'Name' can itself contains [] characters, which is acceptable with the current format and parsing code.
            line_end[-1] = 0;
            const char* name_end = line_end - 1;
            const char* type_start = line + 1;
            char* type_end = (char*)(void*)ImStrchrRange(type_start, name_end, ']');
            const char* name_start = type_end ? ImStrchrRange(type_end + 1, name_end, '[') : NULL;
            if (!type_end || !name_start)
                continue;
            *type_end = 0; // Overwrite first ']'
            name_start++;  // Skip second '['
            entry_handler = FindSettingsHandler(type_start);
            entry_data = entry_handler ? entry_handler->ReadOpenFn(&g, entry_handler, name_start) : NULL;
        }
        else if (entry_handler != NULL && entry_data != NULL)
        {
            // Let type handler parse the line
            entry_handler->ReadLineFn(&g, entry_handler, entry_data, line);
        }