/* -*-c-*-
*
- * $Id: mptext.h,v 1.4 2000/06/17 11:46:58 mdw Exp $
+ * $Id: mptext.h,v 1.6 2002/10/15 22:58:29 mdw Exp $
*
* Textual representation of multiprecision numbers
*
/*----- Revision history --------------------------------------------------*
*
* $Log: mptext.h,v $
+ * Revision 1.6 2002/10/15 22:58:29 mdw
+ * Fast estimation of number representation lengths.
+ *
+ * Revision 1.5 2000/10/08 12:04:58 mdw
+ * (MP_DOFPRINTFR): cope with null pointers.
+ *
* Revision 1.4 2000/06/17 11:46:58 mdw
* Convenience macros for producing debugging output containing MP
* integers.
extern int mp_write(mp */*m*/, int /*radix*/,
const mptext_ops */*ops*/, void */*p*/);
+/* --- @mptext_len@ --- *
+ *
+ * Arguments: @mp *x@ = number to work on
+ * @int r@ = radix the number will be expressed in
+ *
+ * Returns: The number of digits needed to represent the number in the
+ * given base. This will not include space for a leading sign
+ * (use @MP_ISNEG@ to check that, or just add one on for luck);
+ * neither will it add space for a terminating null. In general
+ * the answer will be an overestimate.
+ */
+
+extern size_t mptext_len(mp */*x*/, int /*r*/);
+
/*----- File I/O ----------------------------------------------------------*/
#include <stdio.h>
#define MP_DOFPRINTFR(fp, args, m, r) do { \
fprintf args; \
- mp_writefile(m, fp, r); \
+ if (m) \
+ mp_writefile(m, fp, r); \
+ else \
+ fputs("<null>", fp); \
fputc('\n', fp); \
} while (0)