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%
% Tango/Weevil - A WEB Tangler and Weaver
% Copyright (C) 1995 Corey Minyard
%
% This program is free software; you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation; either version 2 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program; if not, write to the Free Software
% Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
%
% Corey Minyard - minyard@metronet.com
%
@includefile weevinfo.xfr
\section{C Language Handler Intro}
This module holds the routines used to process ``C'' code for weevil.
@code <*>
@<Includes>
@<Structures>
@<c_handle_char>
@<init_c_lang>
@endcode
\section{Includes}
@code <Includes>
#include <stdio.h>
#include <stdlib.h>
#include "weevinfo.h"
@endcode
\section{Structures}
@code <Structures>
typedef struct
{
bool in_comment;
int quote_char;
} t_c_lang;
@endcode
\section{c\_handler\_char}
\begin{twproc}{c\_handle\_char}
\Description Handles a character for the ``C'' language. It will
scan the input and return the proper code depending
on if the code is currently in a string or comment.
\ReturnValues \verb|int| - May be one of the following:
\begin{twparmlist}
\item[PROCESS\_CHAR\_NORMALLY] This is a standard
character that
should be handled normally by weevil.
\item[PROCESS\_CHAR\_INSTRING] This character is in
a string or
comment, it should not be scanned for special
weevil characters.
\item[PROCESS\_CHAR\_SKIPNEXT] This character and the
following character should be skipped without
being scanned for special weevil characters.
\end{twparmlist}
\Inputs \begin{twparmlist}
\item[lpwd] Weevil information.
\item[c] The current input character.
\item[next\_c] The next input character.
\end{twparmlist}
\StartCode
@code <c_handle_char>
int
c_handle_char(t_lpweevildat *lpwd,
char c,
char next_c)
{
int retval;
t_c_lang *c_info;
c_info = lpwd->lang_data;
if (c_info->in_comment)
{
if ((c == '*') && (next_c == '/'))
{
c_info->in_comment = FALSE;
retval = PROCESS_CHAR_SKIPNEXT;
}
else
{
retval = PROCESS_CHAR_INSTRING;
}
}
else if (c_info->quote_char != -1)
{
if (c == c_info->quote_char)
{
c_info->quote_char = -1;
retval = PROCESS_CHAR_INSTRING;
}
else if (c == '\\')
{
retval = PROCESS_CHAR_SKIPNEXT;
}
else
{
retval = PROCESS_CHAR_INSTRING;
}
}
else
{
retval = PROCESS_CHAR_NORMALLY;
switch(c)
{
case '\'':
case '"':
c_info->quote_char = c;
retval = PROCESS_CHAR_INSTRING;
break;
case '/':
if (next_c == '*')
{
c_info->in_comment = TRUE;
retval = PROCESS_CHAR_INSTRING;
break;
}
break;
default:
/* Nothing to do. */
break;
}
}
return(retval);
}
@endcode
\end{twproc}
\section{init\_c\_lang}
\begin{twproc}{init\_c\_lang}
\Description Initializes the ``C'' language handler. It allocates
some memory and initializes it.
\Inputs \begin{twparmlist}
\item[lpwd] Weevil information.
\end{twparmlist}
\StartCode
@code <init_c_lang>
void
init_c_lang(t_lpweevildat *lpwd)
{
t_c_lang *c_info;
c_info = malloc(sizeof(*c_info));
if (c_info == NULL)
{
fprintf(stderr, "Unable to allocate enough memory\n");
exit(1);
}
c_info->quote_char = -1;
c_info->in_comment = FALSE;
lpwd->lang_data = c_info;
}
@endcode
\end{twproc}
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