suspect-devices/circuitpython/py/formatfloat.c, branch v1.8.3CircuitPython - a Python implementation for teaching coding with microcontrollershttps://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=v1.8.32016-03-29T21:07:15+00:00py/formatfloat: Fix further cases of buffer overflow in formatting.2016-03-29T21:07:15+00:00Damien Georgedamien.p.george@gmail.com2016-03-29T21:07:15+00:00urn:sha1:e1e7657277f0c3ea6a207fa7768110475a52c39c
Includes extensive test cases to catch hopefully all cases where
buffer might overflow.
py/formatfloat: Fix case of float format where leading digit was "10".2016-03-29T21:03:13+00:00Damien Georgedamien.p.george@gmail.com2016-03-29T21:03:13+00:00urn:sha1:03b8bb7ec9f2da5829794ebef0394c0a69b4f643
When taking the logarithm of the float to determine the exponent, there
are some edge cases that finish the log loop too large. Eg for an
input value of 1e32-epsilon, this is actually less than 1e32 from the
log-loop table and finishes as 10.0e31 when it should be 1.0e32. It
is thus rendered as :e32 (: comes after 9 in ascii).
There was the same problem with numbers less than 1.
py/formatfloat: Fix buffer overflow when formatting tiny numbers.2016-03-15T12:21:56+00:00Damien Georgedamien.p.george@gmail.com2016-03-15T12:21:56+00:00urn:sha1:cea6cf8a5e87127eccc8214cbffa2d4c8aae8527py/formatfloat: Add ability to format doubles with exponents > 99.2016-01-29T11:39:12+00:00Damien Georgedamien.p.george@gmail.com2016-01-29T11:39:12+00:00urn:sha1:7417ccfb0d27c7c09b5ed6468a9e3ca729af41bb
For single prec, exponents never get larger than about 37. For double
prec, exponents can be larger than 99 and need 3 bytes to format. This
patch makes the number of bytes needed configurable.
Addresses issue #1772.
py/formatfloat: Handle calculation of integer digit for %f format properly.2015-11-22T18:05:08+00:00Paul Sokolovskypfalcon@users.sourceforge.net2015-11-22T18:02:16+00:00urn:sha1:3d6240ba1b4f6f33a27b9eed7e51286f95d4cbe9
%f prints true integer digit, so its calculation should happen before any
exponential scaling.
py/formatfloat: Workaround (fix?) incorrect rounding for %f format.2015-11-22T16:09:28+00:00Paul Sokolovskypfalcon@users.sourceforge.net2015-11-22T16:09:28+00:00urn:sha1:3c4c0698021a9eed5ab66b1c47c0180dd1fabcf4py/formatfloat: Convert to fully portable implementation.2015-11-22T15:54:05+00:00Paul Sokolovskypfalcon@users.sourceforge.net2015-11-22T13:42:09+00:00urn:sha1:9aaccd4735d60798963212d72989a9b9d852fc6d
This takes previous IEEE-754 single precision float implementation, and
converts it to fully portable parametrizable implementation using C99
functions like signbit(), isnan(), isinf(). As long as those functions
are available (they can be defined in adhoc manner of course), and
compiler can perform standard arithmetic and comparison operations on a
float type, this implementation will work with any underlying float type
(including types whose mantissa is larger than available intergral integer
type).
stmhal: fix single precision float printing error2015-09-11T20:09:50+00:00Dave Hylandsdhylands@gmail.com2015-08-31T22:43:31+00:00urn:sha1:9d6128acdccb463edfe9a3b7dbf86417643104bb
Fixes #1435.
py: Implement mp_format_float for doubles and use where appropriate2015-05-17T20:47:11+00:00stijnstinos@zoho.com2015-05-16T08:54:19+00:00urn:sha1:861670ba2ad6fe575de4a31c95c01070ed900391
This allows using (almost) the same code for printing floats everywhere,
removes the dependency on sprintf and uses just snprintf and
applies an msvc-specific fix for snprintf in a single place so
nan/inf are now printed correctly.
py/formatfloat.c: Fix format of floating point numbers near 1.0.2015-04-12T12:06:20+00:00Dave Hylandsdhylands@gmail.com2015-04-12T07:36:00+00:00urn:sha1:b21786947fabbdef76824d899263bec51779738b
In particular, numbers which are less than 1.0 but which
round up to 1.0.
This also makes those numbers which round up to 1.0 to
print with e+00 rather than e-00 for those formats which
print exponents.
Addresses issue #1178.