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Use literals in place of LLONG_MIN, LLONG_MAX ULLONG_MAX if they are not available. Amend 498c0dcb4c. We prefer using the defines if available in limits.h because they somehow tend to work without warnings when enabling strict C++03 compilation. The 3 literals are fallbacks.. (#1926).

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omar
2018-08-06 13:07:19 +02:00
parent 0905202f44
commit 9d8a0374d3
2 changed files with 26 additions and 6 deletions
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23
imgui_demo.cpp
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@ -1022,14 +1022,25 @@ void ImGui::ShowDemoWindow(bool* p_open)
if (ImGui::TreeNode("Data Types"))
{
// The DragScalar, InputScalar, SliderScalar functions allow manipulating most common data types: signed/unsigned int/long long and float/double
// To avoid polluting the public API with all possible combinations, we use the ImGuiDataType enum to pass the type, and argument-by-values are turned into argument-by-address.
// The DragScalar/InputScalar/SliderScalar functions allow various data types: signed/unsigned int/long long and float/double
// To avoid polluting the public API with all possible combinations, we use the ImGuiDataType enum to pass the type,
// and passing all arguments by address.
// This is the reason the test code below creates local variables to hold "zero" "one" etc. for each types.
// In practice, if you frequently use a given type that is not covered by the normal API entry points, you may want to wrap it yourself inside a 1 line function
// which can take typed values argument instead of void*, and then pass their address to the generic function. For example:
// bool SliderU64(const char *label, u64* value, u64 min = 0, u64 max = 0, const char* format = "%lld") { return SliderScalar(label, ImGuiDataType_U64, value, &min, &max, format); }
// Below are helper variables we can take the address of to work-around this:
// In practice, if you frequently use a given type that is not covered by the normal API entry points, you can wrap it
// yourself inside a 1 line function which can take typed argument as value instead of void*, and then pass their address
// to the generic function. For example:
// bool MySliderU64(const char *label, u64* value, u64 min = 0, u64 max = 0, const char* format = "%lld")
// {
// return SliderScalar(label, ImGuiDataType_U64, value, &min, &max, format);
// }
// Limits (as helper variables that we can take the address of)
// Note that the SliderScalar function has a maximum usable range of half the natural type maximum, hence the /2 below.
#ifndef LLONG_MIN
ImS64 LLONG_MIN = -9223372036854775807LL - 1;
ImS64 LLONG_MAX = 9223372036854775807LL;
ImU64 ULLONG_MAX = (2ULL * 9223372036854775807LL + 1);
#endif
const ImS32 s32_zero = 0, s32_one = 1, s32_fifty = 50, s32_min = INT_MIN/2, s32_max = INT_MAX/2, s32_hi_a = INT_MAX/2 - 100, s32_hi_b = INT_MAX/2;
const ImU32 u32_zero = 0, u32_one = 1, u32_fifty = 50, u32_min = 0, u32_max = UINT_MAX/2, u32_hi_a = UINT_MAX/2 - 100, u32_hi_b = UINT_MAX/2;
const ImS64 s64_zero = 0, s64_one = 1, s64_fifty = 50, s64_min = LLONG_MIN/2, s64_max = LLONG_MAX/2, s64_hi_a = LLONG_MAX/2 - 100, s64_hi_b = LLONG_MAX/2;