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Merge bitcoin/bitcoin#23156: refactor: Remove unused ParsePrechecks and ParseDouble

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fa9d72a794 Remove unused ParseDouble and ParsePrechecks (MarcoFalke)
fa3cd28535 refactor: Remove unused ParsePrechecks from ParseIntegral (MarcoFalke)

Pull request description:

  All of the `ParsePrechecks` are already done by `ToIntegral`, so remove them from `ParseIntegral`.

  Also:
  * Remove redundant `{}`. See https://github.com/bitcoin/bitcoin/pull/20457#discussion_r720116866
  * Add missing failing c-string test case
  * Add missing failing test cases for non-int32_t integral types

ACKs for top commit:
  laanwj:
    Code review ACK fa9d72a794, good find on ParseDouble not being used at all, and testing for behavior of embedded NULL characters is always a good thing.
  practicalswift:
    cr ACK fa9d72a794

Tree-SHA512: 3d654dcaebbf312dd57e54241f9aa6d35b1d1d213c37e4c6b8b9a69bcbe8267a397474a8b86b57740fbdd8e3d03b4cdb6a189a9eb8e05cd38035dab195410aa7
This commit is contained in:
MarcoFalke
2021-10-04 15:05:55 +02:00
parent cdb4dfcbf1 fa9d72a794
commit 42fedb4acd
4 changed files with 41 additions and 89 deletions
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30
src/util/strencodings.cpp
View File

@@ -281,16 +281,11 @@ std::string DecodeBase32(const std::string& str, bool* pf_invalid)
return std::string((const char*)vchRet.data(), vchRet.size());
}
[[nodiscard]] static bool ParsePrechecks(const std::string&);
namespace {
template <typename T>
bool ParseIntegral(const std::string& str, T* out)
{
static_assert(std::is_integral<T>::value);
if (!ParsePrechecks(str)) {
return false;
}
// Replicate the exact behavior of strtol/strtoll/strtoul/strtoull when
// handling leading +/- for backwards compatibility.
if (str.length() >= 2 && str[0] == '+' && str[1] == '-') {
@@ -307,17 +302,6 @@ bool ParseIntegral(const std::string& str, T* out)
}
}; // namespace
[[nodiscard]] static bool ParsePrechecks(const std::string& str)
{
if (str.empty()) // No empty string allowed
return false;
if (str.size() >= 1 && (IsSpace(str[0]) || IsSpace(str[str.size()-1]))) // No padding allowed
return false;
if (!ValidAsCString(str)) // No embedded NUL characters allowed
return false;
return true;
}
bool ParseInt32(const std::string& str, int32_t* out)
{
return ParseIntegral<int32_t>(str, out);
@@ -348,20 +332,6 @@ bool ParseUInt64(const std::string& str, uint64_t* out)
return ParseIntegral<uint64_t>(str, out);
}
bool ParseDouble(const std::string& str, double *out)
{
if (!ParsePrechecks(str))
return false;
if (str.size() >= 2 && str[0] == '0' && str[1] == 'x') // No hexadecimal floats allowed
return false;
std::istringstream text(str);
text.imbue(std::locale::classic());
double result;
text >> result;
if(out) *out = result;
return text.eof() && !text.fail();
}
std::string FormatParagraph(const std::string& in, size_t width, size_t indent)
{
std::stringstream out;

13
src/util/strencodings.h
View File

@@ -123,7 +123,9 @@ constexpr inline bool IsSpace(char c) noexcept {
}
/**
* Convert string to integral type T.
* Convert string to integral type T. Leading whitespace, a leading +, or any
* trailing character fail the parsing. The required format expressed as regex
* is `-?[0-9]+`.
*
* @returns std::nullopt if the entire string could not be parsed, or if the
* parsed value is not in the range representable by the type T.
@@ -137,7 +139,7 @@ std::optional<T> ToIntegral(const std::string& str)
if (first_nonmatching != str.data() + str.size() || error_condition != std::errc{}) {
return std::nullopt;
}
return {result};
return result;
}
/**
@@ -182,13 +184,6 @@ std::optional<T> ToIntegral(const std::string& str)
*/
[[nodiscard]] bool ParseUInt64(const std::string& str, uint64_t *out);
/**
* Convert string to double with strict parse error feedback.
* @returns true if the entire string could be parsed as valid double,
* false if not the entire string could be parsed or when overflow or underflow occurred.
*/
[[nodiscard]] bool ParseDouble(const std::string& str, double *out);
/**
* Convert a span of bytes to a lower-case hexadecimal string.
*/