Get rid of CL_REQUIRE/CL_PROVIDE(cl_F_exp1_var).

Turn cl_[SDFL]F_exp1 global variables into functions (which return a reference
to the static value) in order to avoid static initialization order problems.

include/cln/float.h

@@ -636,8 +636,6 @@ extern const cl_F exp1 (float_format_t f);
 // exp1() liefert die Zahl e = exp(1) im Default-Float-Format.
 extern const cl_F exp1 (void);
 
-//CL_REQUIRE(cl_F_exp1_var)
-
 
 // ln(x) liefert zu einem Float x>0 die Zahl ln(x).
 extern const cl_F ln (const cl_F& x);

src/float/transcendental/cl_F_exp1.cc

@@ -18,9 +18,9 @@ namespace cln {
 const cl_F exp1 (const cl_F& y)
 {
 	floattypecase(y
-	,	return cl_SF_exp1;
-	,	return cl_FF_exp1;
-	,	return cl_DF_exp1;
+	,	return cl_SF_exp1();
+	,	return cl_FF_exp1();
+	,	return cl_DF_exp1();
 	,	return exp1(TheLfloat(y)->len);
 	);
 }

src/float/transcendental/cl_F_exp1_def.cc

@@ -17,9 +17,9 @@ namespace cln {
 const cl_F exp1 (void)
 {
 	floatformatcase(default_float_format
-	,	return cl_SF_exp1;
-	,	return cl_FF_exp1;
-	,	return cl_DF_exp1;
+	,	return cl_SF_exp1();
+	,	return cl_FF_exp1();
+	,	return cl_DF_exp1();
 	,	return exp1(len);
 	);
 }

src/float/transcendental/cl_F_exp1_f.cc

@@ -17,9 +17,9 @@ namespace cln {
 const cl_F exp1 (float_format_t f)
 {
 	floatformatcase((uintC)f
-	,	return cl_SF_exp1;
-	,	return cl_FF_exp1;
-	,	return cl_DF_exp1;
+	,	return cl_SF_exp1();
+	,	return cl_FF_exp1();
+	,	return cl_DF_exp1();
 	,	return exp1(len);
 	);
 }

src/float/transcendental/cl_F_exp1_var.cc

@@ -3,8 +3,6 @@
 // General includes.
 #include "cl_sysdep.h"
 
-CL_PROVIDE(cl_F_exp1_var)
-
 // Specification.
 #include "cl_F_tran.h"
 
@@ -18,20 +16,36 @@ CL_PROVIDE(cl_F_exp1_var)
 
 namespace cln {
 
-// Mantisse von exp(1) :
-  static const uintD exp1_mantisse [64/intDsize] =
-    #include "cl_F_exp1_var.h"
-
-cl_LF cl_LF_exp1 = encode_LF_array(0,2,exp1_mantisse,64/intDsize);
+cl_LF& cl_LF_exp1()
+{
+	// Mantisse von exp(1) :
+	static const uintD exp1_mantisse [64/intDsize] =
+		#include "cl_F_exp1_var.h"
+	static cl_LF val = encode_LF_array(0,2,exp1_mantisse,64/intDsize);
+	return val;
+}
 
 // Problem: If someone changes free_hook, the destructor of this
 // will call the new hook, passing it some pointer obtained by the old
 // malloc_hook. ??
 
-const cl_SF cl_SF_exp1 = cl_LF_to_SF(cl_LF_exp1);
-const cl_FF cl_FF_exp1 = cl_LF_to_FF(cl_LF_exp1);
-const cl_DF cl_DF_exp1 = cl_LF_to_DF(cl_LF_exp1);
+const cl_SF& cl_SF_exp1()
+{
+	static const cl_SF val = cl_LF_to_SF(cl_LF_exp1());
+	return val;
+}
+
+const cl_FF& cl_FF_exp1()
+{
+	static const cl_FF val = cl_LF_to_FF(cl_LF_exp1());
+	return val;
+}
+
+const cl_DF& cl_DF_exp1()
+{
+	static const cl_DF val = cl_LF_to_DF(cl_LF_exp1());
+	return val;
+}
 
 }  // namespace cln
 
-CL_PROVIDE_END(cl_F_exp1_var)

src/float/transcendental/cl_F_tran.h

@@ -114,10 +114,10 @@ extern const cl_F cl_ln10 (const cl_F& y);
 extern const cl_F cl_ln10 (float_format_t f);
 
 // e = exp(1).
-extern const cl_SF cl_SF_exp1;
-extern const cl_FF cl_FF_exp1;
-extern const cl_DF cl_DF_exp1;
-extern cl_LF cl_LF_exp1; // as long as it has ever been computed
+extern const cl_SF& cl_SF_exp1();
+extern const cl_FF& cl_FF_exp1();
+extern const cl_DF& cl_DF_exp1();
+extern cl_LF& cl_LF_exp1(); // as long as it has ever been computed
 extern const cl_LF exp1 (uintC len); // computes it even further
 
 // expx(x) liefert zu einem Float x (betragsmäßig <1) exp(x) als Float.

src/float/transcendental/cl_LF_exp1.cc

@@ -78,13 +78,13 @@ const cl_LF compute_exp1 (uintC len)
 
 const cl_LF exp1 (uintC len)
 {
-	var uintC oldlen = TheLfloat(cl_LF_exp1)->len; // vorhandene Länge
+	var uintC oldlen = TheLfloat(cl_LF_exp1())->len; // vorhandene Länge
 	if (len < oldlen)
-		return shorten(cl_LF_exp1,len);
+		return shorten(cl_LF_exp1(),len);
 	if (len == oldlen)
-		return cl_LF_exp1;
+		return cl_LF_exp1();
 
-	// TheLfloat(cl_LF_exp1)->len um mindestens einen konstanten Faktor
+	// TheLfloat(cl_LF_exp1())->len um mindestens einen konstanten Faktor
 	// > 1 wachsen lassen, damit es nicht zu häufig nachberechnet wird:
 	var uintC newlen = len;
 	oldlen += floor(oldlen,2); // oldlen * 3/2
@@ -92,8 +92,8 @@ const cl_LF exp1 (uintC len)
 		newlen = oldlen;
 
 	// gewünschte > vorhandene Länge -> muß nachberechnen:
-	cl_LF_exp1 = compute_exp1(newlen); // (exp 1)
-	return (len < newlen ? shorten(cl_LF_exp1,len) : cl_LF_exp1);
+	cl_LF_exp1() = compute_exp1(newlen); // (exp 1)
+	return (len < newlen ? shorten(cl_LF_exp1(),len) : cl_LF_exp1());
 }
 
 }  // namespace cln