diff options
Diffstat (limited to 'src/pugixpath.cpp')
| -rw-r--r-- | src/pugixpath.cpp | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/src/pugixpath.cpp b/src/pugixpath.cpp index 9562ca1..d20baad 100644 --- a/src/pugixpath.cpp +++ b/src/pugixpath.cpp @@ -436,9 +436,15 @@ namespace #endif
}
- double ieee754_round(double value)
+ double round_nearest(double value)
{
- return is_nan(value) ? value : floor(value + 0.5);
+ return floor(value + 0.5);
+ }
+
+ double round_nearest_nzero(double value)
+ {
+ // same as round_nearest, but returns -0 for [-0.5, -0]
+ return (value >= -0.5 && value <= 0) ? ceil(value) : floor(value + 0.5);
}
const char_t* local_name(const char_t* name)
@@ -2104,8 +2110,7 @@ namespace pugi }
case ast_func_round:
- // correct except for negative zero (it returns positive zero instead of negative)
- return ieee754_round(m_left->eval_number(c));
+ return round_nearest_nzero(m_left->eval_number(c));
default:
{
@@ -2232,7 +2237,7 @@ namespace pugi case ast_func_substring_2:
{
string_t s = m_left->eval_string(c);
- double first = ieee754_round(m_right->eval_number(c));
+ double first = round_nearest(m_right->eval_number(c));
if (is_nan(first)) return string_t(); // NaN
else if (first >= s.length() + 1) return string_t();
@@ -2245,8 +2250,8 @@ namespace pugi case ast_func_substring_3:
{
string_t s = m_left->eval_string(c);
- double first = ieee754_round(m_right->eval_number(c));
- double last = first + ieee754_round(m_third->eval_number(c));
+ double first = round_nearest(m_right->eval_number(c));
+ double last = first + round_nearest(m_third->eval_number(c));
if (is_nan(first) || is_nan(last)) return string_t();
else if (first >= s.length() + 1) return string_t();
|