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//
// ParsedString.cc
//
// ParsedString: Contains a string. The string my contain $var, ${var}, $(var)
// `filename`. The get method will expand those using the
// dictionary given in argument.
//
// Part of the ht://Dig package <https://htdig.sourceforge.net/>
// Copyright (c) 1999-2004 The ht://Dig Group
// For copyright details, see the file COPYING in your distribution
// or the GNU Library General Public License (LGPL) version 2 or later
// <http://www.gnu.org/copyleft/lgpl.html>
//
// $Id: ParsedString.cc,v 1.9 2004/05/28 13:15:21 lha Exp $
//
#ifdef HAVE_CONFIG_H
#include "htconfig.h"
#endif /* HAVE_CONFIG_H */
#include "ParsedString.h"
#include <ctype.h>
#include <stdio.h>
//*****************************************************************************
// ParsedString::ParsedString()
//
ParsedString::ParsedString()
{
}
//*****************************************************************************
//
ParsedString::ParsedString(const String& s)
{
value = s;
}
//*****************************************************************************
// ParsedString::~ParsedString()
//
ParsedString::~ParsedString()
{
}
//*****************************************************************************
//
void
ParsedString::set(const String& str)
{
value = str;
}
//*****************************************************************************
// Return a fully parsed string.
//
// Allowed syntax:
// $var
// ${var}
// $(var)
// `filename`
//
// The filename can also contain variables
//
const String
ParsedString::get(const Dictionary &dict) const
{
String variable;
String parsed;
ParsedString *temp;
const char *str = value.get();
char delim = ' ';
int need_delim = 0;
while (*str)
{
if (*str == '$')
{
//
// A dollar sign starts a variable.
//
str++;
need_delim = 1;
if (*str == '{')
delim = '}';
else if (*str == '(')
delim = ')';
else
need_delim = 0;
if (need_delim)
str++;
variable.trunc();
while (isalnum(*str) || *str == '_' || *str == '-')
{
variable << *str++;
}
if (*str)
{
if (need_delim && *str == delim)
{
//
// Found end of variable
//
temp = (ParsedString *) dict[variable];
if (temp)
parsed << temp->get(dict);
str++;
}
else if (need_delim)
{
//
// Error. Probably an illegal value in the name We'll
// assume the variable ended here.
//
temp = (ParsedString *) dict[variable];
if (temp)
parsed << temp->get(dict);
}
else
{
//
// This variable didn't have a delimiter.
//
temp = (ParsedString *) dict[variable];
if (temp)
parsed << temp->get(dict);
}
}
else
{
//
// End of string reached. We'll assume that this is also
// the end of the variable
//
temp = (ParsedString *) dict[variable];
if (temp)
parsed << temp->get(dict);
}
}
else if (*str == '`')
{
//
// Back-quote delimits a filename which we need to insert
//
str++;
variable.trunc();
while (*str && *str != '`')
{
variable << *str++;
}
if (*str == '`')
str++;
ParsedString filename(variable);
variable.trunc();
getFileContents(variable, filename.get(dict));
parsed << variable;
}
else if (*str == '\\')
{
//
// Backslash escapes the next character
//
str++;
if (*str)
parsed << *str++;
}
else
{
//
// Normal character
//
parsed << *str++;
}
}
return parsed;
}
void
ParsedString::getFileContents(String &str, const String& filename) const
{
FILE *fl = fopen(filename, "r");
char buffer[1000];
if (!fl)
return;
while (fgets(buffer, sizeof(buffer), fl))
{
String s(buffer);
s.chop("\r\n\t ");
str << s << ' ';
}
str.chop(1);
fclose(fl);
}
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