cosmos_io.c in cosmos-3.1.0

- old
+ new
@@ -1,117 +1,117 @@
-/*
-# Copyright 2014 Ball Aerospace & Technologies Corp.
-# All Rights Reserved.
-#
-# This program is free software; you can modify and/or redistribute it
-# under the terms of the GNU General Public License
-# as published by the Free Software Foundation; version 3 with
-# attribution addendums as found in the LICENSE.txt
-*/
-
-#include "ruby.h"
-#include "stdio.h"
-
-static const int endianness_check = 1;
-#define HOST_ENDIANNESS (*((char *) &endianness_check))
-#define COSMOS_BIG_ENDIAN 0
-#define COSMOS_LITTLE_ENDIAN 1
-
-VALUE mCosmosIO = Qnil;
-
-static ID id_method_read         = 0;
-
-/* Reads a length field and then return the String resulting from reading the
-  * number of bytes the length field indicates
-  *
-  * For example:
-  *   io = StringIO.new
-  *   # where io is "\x02\x01\x02\x03\x04...."
-  *   result = io.read_length_bytes(1)
-  *   # result will be "\x01x02" because the length field was given
-  *   # to be 1 byte. We read 1 byte which is a 2. So we then read two
-  *   # bytes and return.
-  *
-  * @param length_num_bytes [Integer] Number of bytes in the length field
-  * @return [String] A String of "length field" number of bytes
-  */
-static VALUE read_length_bytes(VALUE self, VALUE param_length_num_bytes)
-{
-  int length_num_bytes = FIX2INT(param_length_num_bytes);
-  unsigned char* string = NULL;
-  long string_length = 0;
-  unsigned short short_length = 0;
-  unsigned char* length_ptr = NULL;
-  VALUE temp_string = Qnil;
-  VALUE temp_string_length = Qnil;
-  VALUE return_value = Qnil;
-
-  /* Read bytes for string length */
-  temp_string = rb_funcall(self, id_method_read, 1, param_length_num_bytes);
-  if (NIL_P(temp_string) || (RSTRING_LEN(temp_string) != length_num_bytes))
-  {
-    return Qnil;
-  }
-
-  string = (unsigned char*) RSTRING_PTR(temp_string);
-  switch (length_num_bytes)
-  {
-    case 1:
-      string_length = (unsigned int) string[0];
-      break;
-    case 2:
-      length_ptr = (unsigned char*) &short_length;
-      if (HOST_ENDIANNESS == COSMOS_BIG_ENDIAN)
-      {
-        length_ptr[1] = string[1];
-        length_ptr[0] = string[0];
-      }
-      else
-      {
-        length_ptr[0] = string[1];
-        length_ptr[1] = string[0];
-      }
-      string_length = short_length;
-      break;
-    case 4:
-      length_ptr = (unsigned char*) &string_length;
-      if (HOST_ENDIANNESS == COSMOS_BIG_ENDIAN)
-      {
-        length_ptr[3] = string[3];
-        length_ptr[2] = string[2];
-        length_ptr[1] = string[1];
-        length_ptr[0] = string[0];
-      }
-      else
-      {
-        length_ptr[0] = string[3];
-        length_ptr[1] = string[2];
-        length_ptr[2] = string[1];
-        length_ptr[3] = string[0];
-      }
-      break;
-    default:
-      return Qnil;
-      break;
-  };
-
-  /* Read String */
-  temp_string_length = UINT2NUM(string_length);
-  return_value = rb_funcall(self, id_method_read, 1, temp_string_length);
-  if (NIL_P(return_value) || (RSTRING_LEN(return_value) != string_length))
-  {
-    return Qnil;
-  }
-
-  return return_value;
-}
-
-/*
- * Initialize methods for CosmosIO
- */
-void Init_cosmos_io (void)
-{
-  id_method_read = rb_intern("read");
-
-  mCosmosIO = rb_define_module("CosmosIO");
-  rb_define_method(mCosmosIO, "read_length_bytes", read_length_bytes, 1);
-}
+/*
+# Copyright 2014 Ball Aerospace & Technologies Corp.
+# All Rights Reserved.
+#
+# This program is free software; you can modify and/or redistribute it
+# under the terms of the GNU General Public License
+# as published by the Free Software Foundation; version 3 with
+# attribution addendums as found in the LICENSE.txt
+*/
+
+#include "ruby.h"
+#include "stdio.h"
+
+static const int endianness_check = 1;
+#define HOST_ENDIANNESS (*((char *) &endianness_check))
+#define COSMOS_BIG_ENDIAN 0
+#define COSMOS_LITTLE_ENDIAN 1
+
+VALUE mCosmosIO = Qnil;
+
+static ID id_method_read         = 0;
+
+/* Reads a length field and then return the String resulting from reading the
+  * number of bytes the length field indicates
+  *
+  * For example:
+  *   io = StringIO.new
+  *   # where io is "\x02\x01\x02\x03\x04...."
+  *   result = io.read_length_bytes(1)
+  *   # result will be "\x01x02" because the length field was given
+  *   # to be 1 byte. We read 1 byte which is a 2. So we then read two
+  *   # bytes and return.
+  *
+  * @param length_num_bytes [Integer] Number of bytes in the length field
+  * @return [String] A String of "length field" number of bytes
+  */
+static VALUE read_length_bytes(VALUE self, VALUE param_length_num_bytes)
+{
+  int length_num_bytes = FIX2INT(param_length_num_bytes);
+  unsigned char* string = NULL;
+  long string_length = 0;
+  unsigned short short_length = 0;
+  unsigned char* length_ptr = NULL;
+  VALUE temp_string = Qnil;
+  VALUE temp_string_length = Qnil;
+  VALUE return_value = Qnil;
+
+  /* Read bytes for string length */
+  temp_string = rb_funcall(self, id_method_read, 1, param_length_num_bytes);
+  if (NIL_P(temp_string) || (RSTRING_LEN(temp_string) != length_num_bytes))
+  {
+    return Qnil;
+  }
+
+  string = (unsigned char*) RSTRING_PTR(temp_string);
+  switch (length_num_bytes)
+  {
+    case 1:
+      string_length = (unsigned int) string[0];
+      break;
+    case 2:
+      length_ptr = (unsigned char*) &short_length;
+      if (HOST_ENDIANNESS == COSMOS_BIG_ENDIAN)
+      {
+        length_ptr[1] = string[1];
+        length_ptr[0] = string[0];
+      }
+      else
+      {
+        length_ptr[0] = string[1];
+        length_ptr[1] = string[0];
+      }
+      string_length = short_length;
+      break;
+    case 4:
+      length_ptr = (unsigned char*) &string_length;
+      if (HOST_ENDIANNESS == COSMOS_BIG_ENDIAN)
+      {
+        length_ptr[3] = string[3];
+        length_ptr[2] = string[2];
+        length_ptr[1] = string[1];
+        length_ptr[0] = string[0];
+      }
+      else
+      {
+        length_ptr[0] = string[3];
+        length_ptr[1] = string[2];
+        length_ptr[2] = string[1];
+        length_ptr[3] = string[0];
+      }
+      break;
+    default:
+      return Qnil;
+      break;
+  };
+
+  /* Read String */
+  temp_string_length = UINT2NUM(string_length);
+  return_value = rb_funcall(self, id_method_read, 1, temp_string_length);
+  if (NIL_P(return_value) || (RSTRING_LEN(return_value) != string_length))
+  {
+    return Qnil;
+  }
+
+  return return_value;
+}
+
+/*
+ * Initialize methods for CosmosIO
+ */
+void Init_cosmos_io (void)
+{
+  id_method_read = rb_intern("read");
+
+  mCosmosIO = rb_define_module("CosmosIO");
+  rb_define_method(mCosmosIO, "read_length_bytes", read_length_bytes, 1);
+}