add hyperbolic trig functions

Author: jcupitt

CHANGELOG.md

@@ -7,6 +7,7 @@
 * `write_to_buffer` tries to use the new target API, then falls back to the old 
   buffer system [jcupitt]
 * don't generate yard docs for deprecated args [jcupitt]
+* add hyperbolic trig functions [jcupitt]
 
 ## Version 2.1.3 (2021-8-23)
 

lib/vips/image.rb

@@ -634,7 +634,7 @@ def write_to_buffer format_string, **opts
       end
 
       if !saver.nil?
-        target = Vips::Target::new_to_memory
+        target = Vips::Target.new_to_memory
         Vips::Operation.call saver, [self, target], opts, option_string
         buffer = target.get("blob")
       else
@@ -1450,6 +1450,48 @@ def atan
       math :atan
     end
 
+    # Return the hyperbolic sine of an image in radians.
+    #
+    # @return [Image] sine of each pixel
+    def sinh
+      math :sinh
+    end
+
+    # Return the hyperbolic cosine of an image in radians.
+    #
+    # @return [Image] cosine of each pixel
+    def cosh
+      math :cosh
+    end
+
+    # Return the hyperbolic tangent of an image in radians.
+    #
+    # @return [Image] tangent of each pixel
+    def tanh
+      math :tanh
+    end
+
+    # Return the inverse hyperbolic sine of an image in radians.
+    #
+    # @return [Image] inverse sine of each pixel
+    def asinh
+      math :asinh
+    end
+
+    # Return the inverse hyperbolic cosine of an image in radians.
+    #
+    # @return [Image] inverse cosine of each pixel
+    def acosh
+      math :acosh
+    end
+
+    # Return the inverse hyperbolic tangent of an image in radians.
+    #
+    # @return [Image] inverse tangent of each pixel
+    def atanh
+      math :atanh
+    end
+
     # Return the natural log of an image.
     #
     # @return [Image] natural log of each pixel

lib/vips/operation.rb

@@ -48,7 +48,7 @@ module Vips
   class Introspect
     attr_reader :name, :description, :flags, :args, :required_input,
       :optional_input, :required_output, :optional_output, :member_x,
-      :method_args, :vips_name, :destructive, :doc_optional_input, 
+      :method_args, :vips_name, :destructive, :doc_optional_input,
       :doc_optional_output
 
     @@introspect_cache = {}
@@ -168,7 +168,7 @@ def add_yard_introspection name
         end
       end
 
-      # and make the arg sets to document by filtering out deprecated args 
+      # and make the arg sets to document by filtering out deprecated args
       @optional_input.each do |arg_name, details|
         next if (details[:flags] & ARGUMENT_DEPRECATED) != 0
         @doc_optional_input[details[:arg_name]] = details