Added a max iterations option to the svm_multiclass_linear_trainer.

dlib/svm/svm_multiclass_linear_trainer.h

@@ -188,6 +188,7 @@ namespace dlib
             num_threads(4),
             C(1),
             eps(0.001),
+            max_iterations(10000),
             verbose(false),
             learn_nonnegative_weights(false)
         {
@@ -224,6 +225,16 @@ namespace dlib
         const scalar_type get_epsilon (
         ) const { return eps; }
 
+        unsigned long get_max_iterations (
+        ) const { return max_iterations; }
+
+        void set_max_iterations (
+            unsigned long max_iter
+        ) 
+        {
+            max_iterations = max_iter;
+        }
+
         void be_verbose (
         )
         {
@@ -358,6 +369,7 @@ namespace dlib
             problem.set_max_cache_size(0);
             problem.set_c(C);
             problem.set_epsilon(eps);
+            problem.set_max_iterations(max_iterations);
 
             unsigned long num_nonnegative = 0;
             if (learn_nonnegative_weights)
@@ -403,6 +415,7 @@ namespace dlib
         unsigned long num_threads;
         scalar_type C;
         scalar_type eps;
+        unsigned long max_iterations;
         bool verbose;
         oca solver;
         bool learn_nonnegative_weights;

dlib/svm/svm_multiclass_linear_trainer_abstract.h

@@ -34,6 +34,7 @@ namespace dlib
                 - get_num_threads() == 4 
                 - learns_nonnegative_weights() == false
                 - get_epsilon() == 0.001
+                - get_max_iterations() == 10000
                 - get_c() == 1
                 - this object will not be verbose unless be_verbose() is called
                 - #get_oca() == oca() (i.e. an instance of oca with default parameters) 
@@ -79,6 +80,22 @@ namespace dlib
                   to execute.
         !*/
 
+        void set_max_iterations (
+            unsigned long max_iter
+        );
+        /*!
+            ensures
+                - #get_max_iterations() == max_iter
+        !*/
+
+        unsigned long get_max_iterations (
+        ); 
+        /*!
+            ensures
+                - returns the maximum number of iterations the SVM optimizer is allowed to
+                  run before it is required to stop and return a result.
+        !*/
+
         void be_verbose (
         );
         /*!