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util: Add ParseUInt32 and ParseUInt64

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Add error and range-checking parsers for unsigned 32 and 64 bit numbers.
The 32-bit variant is required for parsing sequence numbers from the
command line in `bitcoin-tx` (see #8164 for discussion). I've thrown in
the 64-bit variant as a bonus, as I'm sure it will be needed at some
point.

Also adds tests, and updates `developer-notes.md`.
This commit is contained in:
Wladimir J. van der Laan
2016-06-08 10:23:25 +02:00
committed by lateminer
parent c6ac3b5c34
commit 853cd3845c
4 changed files with 112 additions and 1 deletions
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doc/developer-notes.md
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@@ -321,7 +321,7 @@ Strings and formatting
buffer overflows and surprises with `\0` characters. Also some C string manipulations
tend to act differently depending on platform, or even the user locale
- Use `ParseInt32`, `ParseInt64`, `ParseDouble` from `utilstrencodings.h` for number parsing
- Use `ParseInt32`, `ParseInt64`, `ParseUInt32`, `ParseUInt64`, `ParseDouble` from `utilstrencodings.h` for number parsing
- *Rationale*: These functions do overflow checking, and avoid pesky locale issues