Refactor: Update integer type usage

This updates the usage of integer types in code I wrote according to our new style guides.

Major changes:
* Use signed instead of unsigned integers in many places.
* C++ containers in blenlib use `int64_t` for size and indices now (instead of `uint`).
* Hash values for C++ containers are 64 bit wide now (instead of 32 bit).

I do hope that I broke no builds, but it is quite likely that some compiler reports
slightly different errors. Please let me know when there are any errors. If the fix
is small, feel free to commit it yourself.
I compiled successfully on linux with gcc and on windows.

1 files changed, 9 insertions, 9 deletions

diff --git a/source/blender/functions/FN_multi_function_builder.hh b/source/blender/functions/FN_multi_function_builder.hh
index c2c95f7c355..95e216558e7 100644
--- a/source/blender/functions/FN_multi_function_builder.hh
+++ b/source/blender/functions/FN_multi_function_builder.hh
@@ -59,7 +59,7 @@ template<typename In1, typename Out1> class CustomMF_SI_SO : public MultiFunctio
   template<typename ElementFuncT> static FunctionT create_function(ElementFuncT element_fn)
   {
     return [=](IndexMask mask, VSpan<In1> in1, MutableSpan<Out1> out1) {
-      mask.foreach_index([&](uint i) { new ((void *)&out1[i]) Out1(element_fn(in1[i])); });
+      mask.foreach_index([&](int i) { new ((void *)&out1[i]) Out1(element_fn(in1[i])); });
     };
   }
 
@@ -101,7 +101,7 @@ class CustomMF_SI_SI_SO : public MultiFunction {
   template<typename ElementFuncT> static FunctionT create_function(ElementFuncT element_fn)
   {
     return [=](IndexMask mask, VSpan<In1> in1, VSpan<In2> in2, MutableSpan<Out1> out1) {
-      mask.foreach_index([&](uint i) { new ((void *)&out1[i]) Out1(element_fn(in1[i], in2[i])); });
+      mask.foreach_index([&](int i) { new ((void *)&out1[i]) Out1(element_fn(in1[i], in2[i])); });
     };
   }
 
@@ -152,7 +152,7 @@ class CustomMF_SI_SI_SI_SO : public MultiFunction {
                VSpan<In3> in3,
                MutableSpan<Out1> out1) {
       mask.foreach_index(
-          [&](uint i) { new ((void *)&out1[i]) Out1(element_fn(in1[i], in2[i], in3[i])); });
+          [&](int i) { new ((void *)&out1[i]) Out1(element_fn(in1[i], in2[i], in3[i])); });
     };
   }
 
@@ -191,7 +191,7 @@ template<typename Mut1> class CustomMF_SM : public MultiFunction {
   template<typename ElementFuncT> static FunctionT create_function(ElementFuncT element_fn)
   {
     return [=](IndexMask mask, MutableSpan<Mut1> mut1) {
-      mask.foreach_index([&](uint i) { element_fn(mut1[i]); });
+      mask.foreach_index([&](int i) { element_fn(mut1[i]); });
     };
   }
 
@@ -220,7 +220,7 @@ template<typename From, typename To> class CustomMF_Convert : public MultiFuncti
     VSpan<From> inputs = params.readonly_single_input<From>(0);
     MutableSpan<To> outputs = params.uninitialized_single_output<To>(1);
 
-    for (uint i : mask) {
+    for (int64_t i : mask) {
       new ((void *)&outputs[i]) To(inputs[i]);
     }
   }
@@ -240,7 +240,7 @@ class CustomMF_GenericConstant : public MultiFunction {
  public:
   CustomMF_GenericConstant(const CPPType &type, const void *value);
   void call(IndexMask mask, MFParams params, MFContext context) const override;
-  uint32_t hash() const override;
+  uint64_t hash() const override;
   bool equals(const MultiFunction &other) const override;
 };
 
@@ -276,10 +276,10 @@ template<typename T> class CustomMF_Constant : public MultiFunction {
   void call(IndexMask mask, MFParams params, MFContext UNUSED(context)) const override
   {
     MutableSpan<T> output = params.uninitialized_single_output<T>(0);
-    mask.foreach_index([&](uint i) { new (&output[i]) T(value_); });
+    mask.foreach_index([&](int i) { new (&output[i]) T(value_); });
   }
 
-  uint32_t hash() const override
+  uint64_t hash() const override
   {
     return DefaultHash<T>{}(value_);
   }
@@ -304,7 +304,7 @@ template<typename T> class CustomMF_Constant : public MultiFunction {
 
 class CustomMF_DefaultOutput : public MultiFunction {
  private:
-  uint output_amount_;
+  int output_amount_;
 
  public:
   CustomMF_DefaultOutput(StringRef name,