RFC int2string optimisation

Some notes:

case T_INT: +#if 0 sprintf(buf, "%"PRINTPIKEINT"d", sp[-1].u.integer); +#else

• {

+#define sizeNUM(v) (8*sizeof(v)*4/10+1+1)

^^^^^^^^^^^^^^^^^^^^ It'd be nice with a comment explaining the various integers above.

•  INT32 org;
  

^^^^^ You should probably have INT_TYPE here; otherwise there'll be problems with semi-large integers on 64-bit architectures.

•  char buf[sizeNUM(org)];
  

•  register char*b = buf+sizeof buf-1;
  

•  register unsigned i;
  

^^^^^^^^ unsigned INT_TYPE here (same as with org above).

•  org = sp[-1].u.integer;
  

[...]

• case T_FLOAT:

• case T_FLOAT: {
• char buf[sizeNUM(double)*2];

^^^^^^^^^^^^^^^^^ Is this safe? What about the exponent?

sprintf(buf, "%f", (double)sp[-1].u.float_number);

[...]

-- Sincerely, Stephen R. van den Berg.