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Updated the nested RegEx classes so they don't need to also take an std::string

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This commit is contained in:
Jesse Beder
2009-06-01 03:42:16 +00:00
parent d2e037396e
commit 620c58abec
2 changed files with 10 additions and 80 deletions
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83
src/regex.cpp
View File

@@ -106,12 +106,19 @@ namespace YAML
// . Returns -1 if no characters were matched (the reason for
// not returning zero is that we may have an empty regex
// which is ALWAYS successful at matching zero characters).
int RegEx::Match(const std::string& str) const
// . REMEMBER that we only match from the start of the buffer!
int RegEx::Match(const Buffer& buffer) const
{
if(!m_pOp)
return str.empty() ? 0 : -1; // the empty regex only is successful on the empty string
return !buffer ? 0 : -1; // the empty regex only is successful on the empty string
return m_pOp->Match(str, *this);
return m_pOp->Match(buffer, *this);
}
int RegEx::Match(const std::string& str) const
{
Buffer buffer(str.c_str(), str.size());
return Match(buffer);
}
// Match
@@ -119,17 +126,6 @@ namespace YAML
{
return Match(in.current());
}
// Match
// . The buffer version does the same thing as the string version;
// REMEMBER that we only match from the start of the buffer!
int RegEx::Match(const Buffer& buffer) const
{
if(!m_pOp)
return !buffer ? 0 : -1; // see above
return m_pOp->Match(buffer, *this);
}
RegEx operator ! (const RegEx& ex)
{
@@ -166,14 +162,6 @@ namespace YAML
// Operators
// MatchOperator
int RegEx::MatchOperator::Match(const std::string& str, const RegEx& regex) const
{
if(str.empty() || str[0] != regex.m_a)
return -1;
return 1;
}
int RegEx::MatchOperator::Match(const Buffer& buffer, const RegEx& regex) const
{
if(!buffer || buffer[0] != regex.m_a)
@@ -182,13 +170,6 @@ namespace YAML
}
// RangeOperator
int RegEx::RangeOperator::Match(const std::string& str, const RegEx& regex) const
{
if(str.empty() || regex.m_a > str[0] || regex.m_z < str[0])
return -1;
return 1;
}
int RegEx::RangeOperator::Match(const Buffer& buffer, const RegEx& regex) const
{
if(!buffer || regex.m_a > buffer[0] || regex.m_z < buffer[0])
@@ -197,16 +178,6 @@ namespace YAML
}
// OrOperator
int RegEx::OrOperator::Match(const std::string& str, const RegEx& regex) const
{
for(unsigned i=0;i<regex.m_params.size();i++) {
int n = regex.m_params[i].Match(str);
if(n >= 0)
return n;
}
return -1;
}
int RegEx::OrOperator::Match(const Buffer& buffer, const RegEx& regex) const
{
for(unsigned i=0;i<regex.m_params.size();i++) {
@@ -221,19 +192,6 @@ namespace YAML
// 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(const Buffer& buffer, const RegEx& regex) const
{
int first = -1;
@@ -248,15 +206,6 @@ namespace YAML
}
// NotOperator
int RegEx::NotOperator::Match(const std::string& str, const RegEx& regex) const
{
if(regex.m_params.empty())
return -1;
if(regex.m_params[0].Match(str) >= 0)
return -1;
return 1;
}
int RegEx::NotOperator::Match(const Buffer& buffer, const RegEx& regex) const
{
if(regex.m_params.empty())
@@ -267,18 +216,6 @@ namespace YAML
}
// SeqOperator
int RegEx::SeqOperator::Match(const std::string& str, const RegEx& regex) const
{
int offset = 0;
for(unsigned i=0;i<regex.m_params.size();i++) {
int n = regex.m_params[i].Match(str.substr(offset));
if(n == -1)
return -1;
offset += n;
}
return offset;
}
int RegEx::SeqOperator::Match(const Buffer& buffer, const RegEx& regex) const
{
int offset = 0;

7
src/regex.h
View File

@@ -19,37 +19,30 @@ namespace YAML
// the operators
struct Operator {
virtual ~Operator() {}
virtual int Match(const std::string& str, const RegEx& regex) const = 0;
virtual int Match(const Buffer& buffer, const RegEx& regex) const = 0;
};
struct MatchOperator: public Operator {
virtual int Match(const std::string& str, const RegEx& regex) const;
virtual int Match(const Buffer& buffer, const RegEx& regex) const;
};
struct RangeOperator: public Operator {
virtual int Match(const std::string& str, const RegEx& regex) const;
virtual int Match(const Buffer& buffer, const RegEx& regex) const;
};
struct OrOperator: public Operator {
virtual int Match(const std::string& str, const RegEx& regex) const;
virtual int Match(const Buffer& buffer, const RegEx& regex) const;
};
struct AndOperator: public Operator {
virtual int Match(const std::string& str, const RegEx& regex) const;
virtual int Match(const Buffer& buffer, const RegEx& regex) const;
};
struct NotOperator: public Operator {
virtual int Match(const std::string& str, const RegEx& regex) const;
virtual int Match(const Buffer& buffer, const RegEx& regex) const;
};
struct SeqOperator: public Operator {
virtual int Match(const std::string& str, const RegEx& regex) const;
virtual int Match(const Buffer& buffer, const RegEx& regex) const;
};