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Refactored common scalar scanning code (from plain, quoted, and block) to one function.

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This commit is contained in:
Jesse Beder 2008-06-29 05:45:41 +00:00
parent 6c193d6fbd
commit 0d5a97bffe
6 changed files with 306 additions and 188 deletions
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49
regex.cpp
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@ -53,6 +53,7 @@ namespace YAML
case REGEX_MATCH: m_pOp = new MatchOperator; break;
case REGEX_RANGE: m_pOp = new RangeOperator; break;
case REGEX_OR: m_pOp = new OrOperator; break;
case REGEX_AND: m_pOp = new AndOperator; break;
case REGEX_NOT: m_pOp = new NotOperator; break;
case REGEX_SEQ: m_pOp = new SeqOperator; break;
}
@ -80,19 +81,13 @@ namespace YAML
// . Returns the number of characters matched.
// . Returns -1 if no characters were matched (the reason for
// not returning zero is that we may have an empty regex
// which SHOULD be considered successfully matching nothing,
// but that of course matches zero characters).
// which is ALWAYS successful at matching zero characters).
int RegEx::Match(const std::string& str) const
{
if(!m_pOp)
return -1;
return 0;
return m_pOp->Match(str, *this);
//case REGEX_EMPTY:
// if(str.empty())
// return 0;
// return -1;
}
// Match
@ -131,6 +126,14 @@ namespace YAML
return ret;
}
RegEx operator && (const RegEx& ex1, const RegEx& ex2)
{
RegEx ret(REGEX_AND);
ret.m_params.push_back(ex1);
ret.m_params.push_back(ex2);
return ret;
}
RegEx operator + (const RegEx& ex1, const RegEx& ex2)
{
RegEx ret(REGEX_SEQ);
@ -194,6 +197,36 @@ namespace YAML
return -1;
}
// AndOperator
// Note: 'AND' is a little funny, since we may be required to match things
// of different lengths. If we find a match, we return the length of
// the FIRST entry on the list.
int RegEx::AndOperator::Match(const std::string& str, const RegEx& regex) const
{
int first = -1;
for(unsigned i=0;i<regex.m_params.size();i++) {
int n = regex.m_params[i].Match(str);
if(n == -1)
return -1;
if(i == 0)
first = n;
}
return first;
}
int RegEx::AndOperator::Match(std::istream& in, const RegEx& regex) const
{
int first = -1;
for(unsigned i=0;i<regex.m_params.size();i++) {
int n = regex.m_params[i].Match(in);
if(n == -1)
return -1;
if(i == 0)
first = n;
}
return first;
}
// NotOperator
int RegEx::NotOperator::Match(const std::string& str, const RegEx& regex) const
{