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Some debugging code (asserts) for the optimized G-code number formatter.

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This commit is contained in:
Vojtech Bubnik 2021-11-18 16:42:00 +01:00
parent 1603d7a2c8
commit ecd71e3e80
1 changed files with 16 additions and 2 deletions
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18
src/libslic3r/GCodeWriter.cpp
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@ -533,9 +533,8 @@ std::string GCodeWriter::set_fan(unsigned int speed) const
return GCodeWriter::set_fan(this->config.gcode_flavor, this->config.gcode_comments, speed);
}
void GCodeFormatter::emit_axis(const char axis, const double v, size_t digits) {
assert(digits <= 6);
assert(digits <= 9);
static constexpr const std::array<int, 10> pow_10{1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000};
*ptr_err.ptr++ = ' '; *ptr_err.ptr++ = axis;
@ -576,6 +575,21 @@ void GCodeFormatter::emit_axis(const char axis, const double v, size_t digits) {
if ((this->ptr_err.ptr + 1) == base_ptr || *this->ptr_err.ptr == '-')
*(++this->ptr_err.ptr) = '0';
this->ptr_err.ptr++;
#if 0 // #ifndef NDEBUG
{
// Verify that the optimized formatter produces the same result as the standard sprintf().
double v1 = atof(std::string(base_ptr, this->ptr_err.ptr).c_str());
char buf[2048];
sprintf(buf, "%.*lf", int(digits), v);
double v2 = atof(buf);
// Numbers may differ when rounding at exactly or very close to 0.5 due to numerical issues when scaling the double to an integer.
// Thus the complex assert.
// assert(v1 == v2);
assert(std::abs(v1 - v) * pow_10[digits] < 0.50001);
assert(std::abs(v2 - v) * pow_10[digits] < 0.50001);
}
#endif // NDEBUG
}
} // namespace Slic3r