diff options
Diffstat (limited to 'src/lib/ratio.cc')
| -rw-r--r-- | src/lib/ratio.cc | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/src/lib/ratio.cc b/src/lib/ratio.cc index 52577d3bb..554d3c36c 100644 --- a/src/lib/ratio.cc +++ b/src/lib/ratio.cc @@ -24,7 +24,6 @@ #include "i18n.h" using std::string; -using std::stringstream; using std::vector; vector<Ratio const *> Ratio::_ratios; @@ -57,3 +56,20 @@ Ratio::from_id (string i) return *j; } + +/** @return Ratio corresponding to a given fractional ratio (+/- 0.01), or 0 */ +Ratio const * +Ratio::from_ratio (float r) +{ + vector<Ratio const *>::iterator j = _ratios.begin (); + while (j != _ratios.end() && fabs ((*j)->ratio() - r) > 0.01) { + ++j; + } + + if (j == _ratios.end ()) { + return 0; + } + + return *j; +} + |