Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/dtinfo/DtMmdb/object/random_gen.C

@@ -0,0 +1,111 @@
+// $XConsortium: random_gen.C /main/6 1996/08/21 15:56:48 drk $
+
+#include <sys/time.h>
+#include <sys/times.h>
+#include "object/random_gen.h"
+
+
+random_gen::~random_gen()
+{
+}
+
+random_gen::random_gen()
+{
+#ifdef __uxp__
+   int seed;
+   struct tms tp;
+   if ((seed = (int)times(&tp)) < 0)
+      seed = 19;
+#else
+   struct timeval tp;
+   struct timezone tzp;
+
+   int seed = ( gettimeofday(&tp, &tzp) == 0 ) ? int(tp.tv_sec) : 19;
+#endif
+
+#ifdef CONTROLLED_SEED
+if ( getenv("SEED") )
+   seed = atoi(getenv("SEED"));
+
+cerr << "seed=" << seed << "\n";
+#endif
+
+   rand_gen.seed(seed);
+}
+   
+static char char_set[] =
+   { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
+    'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
+    'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
+    'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
+    ' ', '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '.', '_', 
+    '+', '|', '=', '\\', '~'
+   };
+     
+void random_gen::random_string(ostream& out, int len)
+{
+   out << len << "\t";
+   for ( int i=0; i<len; i++ )
+     out << char_set[rand_gen.rand() % sizeof(char_set)]; 
+
+   out << "\n";
+}
+
+static char* buf = 0;
+static int buf_len = 0;
+
+const char* random_gen::get_random_string(int low, int high)
+{
+   int x = pick_a_value(low, high);
+ 
+   if ( buf_len < x ) {
+      buf_len = x;
+      delete buf;
+      buf = new char[buf_len+1];
+   }
+   for ( int i=0; i<buf_len; i++ )
+     buf[i] = char_set[rand_gen.rand() % sizeof(char_set)]; 
+
+   buf[i] = 0;
+   
+   return buf;
+}
+
+int random_gen::pick_a_value(int low, int high)
+{
+   return ( low < high ) ? rand_gen.rand() % (high - low) + low : low;
+}
+
+void random_gen::_random_string(ostream& out, int low, int high)
+{
+   int l = pick_a_value(low, high);
+   random_string(out, l);
+}
+
+void random_gen::random_string(ostream& out, int low, int high, Boolean x)
+{
+   if ( x == true )
+      out << "6\n";
+   _random_string(out, low, high);
+}
+
+void 
+random_gen::random_string_to_be_compressed(ostream& out, int l, int h, const oid_t& id)
+{
+   out << "11\n";
+   out << id << "\n";
+   _random_string(out, l, h);
+}
+
+void random_gen::random_oid(ostream& out, int class_code, int instance_code)
+{
+   out << "7\n";
+   out << class_code << "." << instance_code << "\n";
+}
+
+void random_gen::random_integer(ostream& out, int value)
+{
+   out << "4\n";
+   out << value << "\n";
+}