From 808f15774ab297987b6970bdf69dc048abde98b2 Mon Sep 17 00:00:00 2001
From: Oscar Dowson <odow@users.noreply.github.com>
Date: Thu, 7 Mar 2024 16:04:08 +1300
Subject: [PATCH] Add support for MOI.RelativeGapTolerance and
 MOI.AbsoluteGapTolerance (#224)

---
 src/MOI/MOI_wrapper.jl | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/src/MOI/MOI_wrapper.jl b/src/MOI/MOI_wrapper.jl
index 7a079325..a4387f8e 100644
--- a/src/MOI/MOI_wrapper.jl
+++ b/src/MOI/MOI_wrapper.jl
@@ -4424,3 +4424,33 @@ function MOI.get(
     column = _info(model, vi).column
     return model.cached_solution.variable_dual[column]
 end
+
+#=
+    RelativeGapTolerance
+=#
+
+MOI.supports(::Optimizer, ::MOI.RelativeGapTolerance) = true
+
+function MOI.get(model::Optimizer, ::MOI.RelativeGapTolerance)
+    return Xpress.getcontrol(model.inner, Lib.XPRS_MIPRELSTOP)
+end
+
+function MOI.set(model::Optimizer, ::MOI.RelativeGapTolerance, value::Float64)
+    Xpress.setcontrol!(model.inner, Lib.XPRS_MIPRELSTOP, value)
+    return
+end
+
+#=
+    AbsoluteGapTolerance
+=#
+
+MOI.supports(::Optimizer, ::MOI.AbsoluteGapTolerance) = true
+
+function MOI.get(model::Optimizer, ::MOI.AbsoluteGapTolerance)
+    return Xpress.getcontrol(model.inner, Lib.XPRS_MIPABSSTOP)
+end
+
+function MOI.set(model::Optimizer, ::MOI.AbsoluteGapTolerance, value::Float64)
+    Xpress.setcontrol!(model.inner, Lib.XPRS_MIPABSSTOP, value)
+    return
+end