diff options
Diffstat (limited to 'amount.cc')
| -rw-r--r-- | amount.cc | 49 |
1 files changed, 49 insertions, 0 deletions
@@ -2,6 +2,11 @@ #include "binary.h" #include "util.h" +#define HAVE_GDTOA 1 +#ifdef HAVE_GDTOA +#include "gdtoa/gdtoa.h" +#endif + #include <list> #include <sstream> #include <cstdlib> @@ -212,6 +217,9 @@ amount_t::amount_t(const unsigned long val) namespace { unsigned char convert_double(mpz_t dest, double val) { +#ifndef HAVE_GDTOA + // This code is far too imprecise to be worthwhile. + mpf_t temp; mpf_init_set_d(temp, val); @@ -248,6 +256,47 @@ namespace { free(buf); return (unsigned char)exp; +#else + int decpt, sign; + char * buf = dtoa(val, 0, 0, &decpt, &sign, NULL); + char * result; + int len = std::strlen(buf); + + if (decpt <= len) { + decpt = len - decpt; + result = NULL; + } else { + // There were trailing zeros, which we have to put back on in + // order to convert this buffer into an integer. + + int zeroes = decpt - len; + result = new char[len + zeroes]; + + std::strcpy(result, buf); + int i; + for (i = 0; i < zeroes; i++) + result[len + i] = '0'; + result[len + i] = '\0'; + + decpt = (len - decpt) + zeroes; + } + + if (sign) { + char * newbuf = new char[std::strlen(result ? result : buf) + 1]; + newbuf[0] = '-'; + std::strcpy(&newbuf[1], result ? result : buf); + mpz_set_str(dest, newbuf, 10); + delete[] newbuf; + } else { + mpz_set_str(dest, result ? result : buf, 10); + } + + if (result) + delete[] result; + freedtoa(buf); + + return decpt; +#endif } } |