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Migrate Text Product Message from std::regex to RE2

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This commit is contained in:
Dan Paulat 2023-12-10 21:55:38 -06:00
parent 4f309ecb39
commit f612abb846
1 changed files with 13 additions and 13 deletions
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26
wxdata/source/scwx/awips/text_product_message.cpp
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@ -4,11 +4,11 @@
#include <scwx/util/streams.hpp>
#include <istream>
#include <regex>
#include <string>
#include <boost/algorithm/string/replace.hpp>
#include <boost/algorithm/string/trim.hpp>
#include <re2/re2.h>
namespace scwx
{
@ -24,7 +24,7 @@ static const auto logger_ = scwx::util::Logger::Create(logPrefix_);
// Segment Header only:
// * <hhmm>_xM_<tz1>_day_mon_<dd>_year_/<hhmm>_xM_<tz2>_day_mon_<dd>_year/
// Look for hhmm (xM|UTC) to key the date/time string
static const std::regex reDateTimeString {"^[0-9]{3,4} ([AP]M|UTC)"};
static constexpr LazyRE2 reDateTimeString = {"^[0-9]{3,4} ([AP]M|UTC)"};
static void ParseCodedInformation(std::shared_ptr<Segment> segment,
const std::string& wfo);
@ -333,7 +333,7 @@ void ParseCodedInformation(std::shared_ptr<Segment> segment,
else if (codedMotionBegin != productContent.cend() &&
codedMotionEnd == productContent.cend() &&
!it->starts_with(" ") &&
!std::regex_search(*it, std::regex {"^[0-9]"})
!(it->length() > 0 && std::isdigit(it->at(0)))
/* Continuation lines */)
{
codedMotionEnd = it;
@ -448,7 +448,7 @@ std::vector<std::string> TryParseMndHeader(std::istream& is)
}
if (!mndHeader.empty() &&
!std::regex_search(mndHeader.back(), reDateTimeString))
!RE2::PartialMatch(mndHeader.back(), *reDateTimeString))
{
// MND Header should end with an Issuance Date/Time Line
mndHeader.clear();
@ -489,8 +489,8 @@ std::optional<SegmentHeader> TryParseSegmentHeader(std::istream& is)
// UGC takes the form SSFNNN-NNN>NNN-SSFNNN-DDHHMM- (NWSI 10-1702)
// Look for SSF(NNN)?[->] to key the UGC string
// Look for DDHHMM- to end the UGC string
static const std::regex reUgcString {"^[A-Z]{2}[CZ]([0-9]{3})?[->]"};
static const std::regex reUgcExpiration {"[0-9]{6}-$"};
static constexpr LazyRE2 reUgcString = {"^[A-Z]{2}[CZ]([0-9]{3})?[->]"};
static constexpr LazyRE2 reUgcExpiration = {"[0-9]{6}-$"};
std::optional<SegmentHeader> header = std::nullopt;
std::string line;
@ -498,14 +498,14 @@ std::optional<SegmentHeader> TryParseSegmentHeader(std::istream& is)
util::getline(is, line);
if (std::regex_search(line, reUgcString))
if (RE2::PartialMatch(line, *reUgcString))
{
header = SegmentHeader();
header->ugcString_.push_back(line);
// If UGC is multi-line, continue parsing
while (!is.eof() && is.peek() != '\r' &&
!std::regex_search(line, reUgcExpiration))
!RE2::PartialMatch(line, *reUgcExpiration))
{
util::getline(is, line);
header->ugcString_.push_back(line);
@ -526,7 +526,7 @@ std::optional<SegmentHeader> TryParseSegmentHeader(std::istream& is)
while (!is.eof() && is.peek() != '\r')
{
util::getline(is, line);
if (!std::regex_search(line, reDateTimeString))
if (!RE2::PartialMatch(line, *reDateTimeString))
{
header->ugcNames_.push_back(line);
}
@ -553,12 +553,12 @@ std::optional<Vtec> TryParseVtecString(std::istream& is)
// P-VTEC takes the form /k.aaa.cccc.pp.s.####.yymmddThhnnZB-yymmddThhnnZE/
// (NWSI 10-1703)
// Look for /k. to key the P-VTEC string
static const std::regex rePVtecString {"^/[OTEX]\\."};
static constexpr LazyRE2 rePVtecString = {"^/[OTEX]\\."};
// H-VTEC takes the form
// /nwsli.s.ic.yymmddThhnnZB.yymmddThhnnZC.yymmddThhnnZE.fr/ (NWSI 10-1703)
// Look for /nwsli. to key the H-VTEC string
static const std::regex reHVtecString {"^/[A-Z0-9]{5}\\."};
static constexpr LazyRE2 reHVtecString = {"^/[A-Z0-9]{5}\\."};
std::optional<Vtec> vtec = std::nullopt;
std::string line;
@ -566,7 +566,7 @@ std::optional<Vtec> TryParseVtecString(std::istream& is)
util::getline(is, line);
if (std::regex_search(line, rePVtecString))
if (RE2::PartialMatch(line, *rePVtecString))
{
bool vtecValid;
@ -577,7 +577,7 @@ std::optional<Vtec> TryParseVtecString(std::istream& is)
util::getline(is, line);
if (std::regex_search(line, reHVtecString))
if (RE2::PartialMatch(line, *reHVtecString))
{
vtec->hVtec_.swap(line);
}