Floating point improvements

- Smaller C: fix a bug in __func__ introduced with
  float-related changes
- make *printf() print floats greater than 1e25
- make *printf() print the plus sign when the format
  includes "+", e.g. printf("%+f\n", 1.0);
- clean up and complete prototypes in <math.h>
- remove non-standard HUGE and LOGHUGE from <math.h>
- add HUGE_VAL to <math.h>
- express some hard-coded limits in terms of constants
  from <float.h>
- uncomment prototypes of several floating point
  conversion functions in <stdlib.h> for Smaller C

include/math.h

@@ -4,16 +4,16 @@
  * specifies the terms and conditions for redistribution.
  */
 
-double  fabs(), floor(), ceil(), fmod(), ldexp();
-double  sqrt(), hypot(), atof();
-double  sin(), cos(), tan(), asin(), acos(), atan(), atan2();
-double  exp(), log(), log10(), pow();
-double  sinh(), cosh(), tanh();
-double  gamma();
-double  j0(), j1(), jn(), y0(), y1(), yn();
+double  fabs(double), floor(double), ceil(double);
+double  sqrt(double), hypot(double, double);
+double  sin(double), cos(double), tan(double);
+double  asin(double), acos(double), atan(double), atan2(double, double);
+double  exp(double), log(double), log10(double), pow(double, double);
+double  sinh(double), cosh(double), tanh(double);
+double  j0(double), j1(double), jn(int, double);
+double  y0(double), y1(double), yn(int, double);
 
-#define HUGE        1.701411733192644270e38
-#define LOGHUGE     39
+#define HUGE_VAL    3.40282347e+38 /* TBD??? use infinity? */
 
 int isnanf(float x);
 int isnan(double x);

include/stdlib.h

@@ -96,12 +96,10 @@ long    random (void);
 char    *setstate (char *);
 void    srandom (unsigned);
 
-#ifndef __SMALLER_C__
 double  atof (const char *);
 double  strtod (const char *, char **);
 char    *ecvt (double, int, int *, int *);
 char    *fcvt (double, int, int *, int *);
 char    *gcvt (double, int, char *);
-#endif
 
 #endif /* _STDLIB_H_ */