* clarify `parseHexInt`, `parseOctInt` docstring and exception msgs
* add `parseBinInt` based on `parseutil.parseBin` implementation
Adds a `parseBinInt`, which parses a binary integer string and returns
it as an integer. This is based on the implementation of
`parseutil.parseBin`, removing the unnecessary parts.
* add tests for all `parse(Hex|Oct|Bin)Int` procs
* replace `parse*Int` proc impls by call to parseutil procs
Replaces the `parse(Hex|Oct|Bin)Int` procedure implementation by calls
to the `parseutil` procs, which receive a mutable argument.
Has the main advantage that the empty string as well as a "prefix
only" string, e.g. "0x" counts as an invalid integer.
Also moves the `parseOctInt` proc further up in the file so that all
`parse` procs are below one another.
* replace `var L` by `let L` in `parse` procs
There's no reason for the usage of `var` here.
* add `maxLen` optional arg for `parseutil.parse(Oct|Bin)`
Plus small change to test cases.
* update changelog about `parse*Int` procs
* fix `rejectParse` template in `tstrutils`
* make sure only `s.len` chars are parsed, if `maxLen+start` > s.len
Fixes a previous bug in `parseHex` (and now affected `parseOct` and
`parseBin`), which allowed to set `start + maxLen` to be larger than
the strings length. This resulted in an out of bounds access.
* move `parse*Int` proc change to breaking changes, add double `
Float literals were not parsed properly when their fractional part
exceeded 53 significant bits. This affected in particular math.PI
and math.E. Rather than reinventing the wheel, this patch reuses
C's strtod() implementation, which already does the heavy lifting
with respect to correctness, though some caution is necessary to
keep float parsing locale-independent.
