diff options
Diffstat (limited to 'extension/rwarray.c')
| -rw-r--r-- | extension/rwarray.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/extension/rwarray.c b/extension/rwarray.c index 9a8c1e4a..532a8da1 100644 --- a/extension/rwarray.c +++ b/extension/rwarray.c @@ -330,7 +330,26 @@ write_number(FILE *fp, awk_value_t *val) if (fwrite(& code, 1, sizeof(code), fp) != sizeof(code)) return awk_false; +#ifdef USE_MPFR_FPIF + /* + * This would be preferable, but it is not available + * on older platforms with mpfr 3.x. It's also marked + * experimental in mpfr 4.1, so perhaps not ready for + * production use yet. + */ if (mpfr_fpif_export(fp, val->num_ptr) != 0) +#else +#define MPFR_STR_BASE 62 /* maximize base to minimize string len */ +#define MPFR_STR_ROUND MPFR_RNDN + /* + * XXX does the choice of MPFR_RNDN matter, given + * that the precision is 0, so we should be rendering + * in full precision? + */ + // We need to write a terminating space, since + // mpfr_inp_str reads until it hits a space or EOF + if ((mpfr_out_str(fp, MPFR_STR_BASE, 0, val->num_ptr, MPFR_STR_ROUND) == 0) || (putc(' ', fp) == EOF)) +#endif return awk_false; } else { code = htonl(VT_GMP); @@ -624,7 +643,14 @@ read_number(FILE *fp, awk_value_t *value, uint32_t code) mpfr_t mpfr_val; mpfr_init(mpfr_val); +#ifdef USE_MPFR_FPIF + /* preferable if widely available and stable */ if (mpfr_fpif_import(mpfr_val, fp) != 0) +#else + // N.B. need to consume the terminating space we wrote + // after mpfr_out_str + if ((mpfr_inp_str(mpfr_val, fp, MPFR_STR_BASE, MPFR_STR_ROUND) == 0) || (getc(fp) != ' ')) +#endif return awk_false; value = make_number_mpfr(& mpfr_val, value); |