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// file : cutl/compiler/sloc-counter.txx
// copyright : Copyright (c) 2009-2013 Code Synthesis Tools CC
// license : MIT; see accompanying LICENSE file
#include <cctype> // std::isspace
namespace cutl
{
namespace compiler
{
template <typename C>
sloc_counter<C>::
sloc_counter (code_stream<C>& out)
: out_ (out),
count_ (0),
prev_ ('\0'),
code_counted_ (false),
construct_ (con_code)
{
}
template <typename C>
void sloc_counter<C>::
put (C c)
{
construct old (construct_);
switch (construct_)
{
case con_code:
{
code (c);
break;
}
case con_c_com:
{
c_comment (c);
break;
}
case con_cxx_com:
{
cxx_comment (c);
break;
}
case con_char_lit:
{
char_literal (c);
break;
}
case con_string_lit:
{
string_literal (c);
break;
}
}
// There are cases when a previous character has been already
// 'used' and therefore can not be used again. Good example
// would be '/* *//'. Here, the second slash doesn't start
// C++ comment since it was already used by C comment.
//
// To account for this we are going to set prev_ to '\0' when
// the mode changes.
//
prev_ = (old == construct_) ? c : '\0';
out_.put (c);
}
template <typename C>
void sloc_counter<C>::
unbuffer ()
{
}
template <typename C>
void sloc_counter<C>::
code (C c)
{
bool count (true);
switch (c)
{
case '/':
{
if (prev_ == '/')
{
construct_ = con_cxx_com;
count = false;
}
else
{
// This slash can be a beginning of a comment but we
// yet have no way to know. Will have to examine it later
// (see below).
//
count = false;
}
break;
}
case '*':
{
if (prev_ == '/')
{
construct_ = con_c_com;
count = false;
}
break;
}
case '\'':
{
construct_ = con_char_lit;
break;
}
case '"':
{
construct_ = con_string_lit;
break;
}
case '\n':
{
code_counted_ = false; // Reset for a new line.
count = false;
break;
}
default:
{
if (std::isspace (c))
count = false;
break;
}
}
if (!code_counted_)
{
if (count)
{
count_++;
code_counted_ = true;
}
else if (prev_ == '/' && construct_ == con_code)
{
// This condition accounts for the fact that we cannot count
// '/' right away since it can be a beginning of a comment.
//
count_++;
code_counted_ = (c != '\n');
}
}
}
template <typename C>
void sloc_counter<C>::
c_comment (C c)
{
switch (c)
{
case '/':
{
if (prev_ == '*')
construct_ = con_code;
break;
}
case '\n':
{
code_counted_ = false; // Reset for a new line.
break;
}
}
}
template <typename C>
void sloc_counter<C>::
cxx_comment (C c)
{
switch (c)
{
case '\n':
{
construct_ = con_code;
code_counted_ = false; // Reset for a new line.
break;
}
}
}
template <typename C>
void sloc_counter<C>::
char_literal (C c)
{
switch (c)
{
case '\'':
{
if (prev_ != '\\')
construct_ = con_code;
break;
}
}
}
template <typename C>
void sloc_counter<C>::
string_literal (C c)
{
switch (c)
{
case '"':
{
if (prev_ != '\\')
construct_ = con_code;
break;
}
case '\n':
{
count_++;
break;
}
}
}
}
}
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