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/*
$Id: component_tokenizer.cpp,v 1.13 2001/12/31 01:31:42 starch Exp $
ClanGUI, copyrights by various people. Have a look in the CREDITS file.
This sourcecode is distributed using the Library GNU Public Licence,
version 2 or (at your option) any later version. Please read LICENSE
for details.
*/
#include "precomp.h"
#include "API/Core/System/clanstring.h"
#include "API/Core/System/error.h"
#include "component_tokenizer.h"
CL_ComponentTokenizer::CL_ComponentTokenizer(const std::string &_data, const std::string &_filename)
{
filename = _filename;
string_data = _data;
data = (char *) string_data.c_str();
total_size = string_data.size();
peek_pos = 0;
last_line = 0;
in_remark = false;
tokenize();
}
CL_ComponentTokenizer::~CL_ComponentTokenizer()
{
}
bool CL_ComponentTokenizer::is_operator(char c)
{
const char *operators = ",=();{}<+-*/>";
return strchr(operators, c) != NULL;
}
bool CL_ComponentTokenizer::is_space(char c)
{
const char *spaces = " \t\r\n";
return strchr(spaces, c) != NULL;
}
bool CL_ComponentTokenizer::is_remark(char c, int position)
{
if (in_remark)
{
if (c == '\n')
{
in_remark = false;
}
return true;
}
else
{
if (c == '/')
{
if (
position+1 < total_size &&
data[position+1] == '/')
{
in_remark = true;
return true;
}
}
else if (c == '#')
{
in_remark = true;
return true;
}
}
return false;
}
void CL_ComponentTokenizer::tokenize()
{
int cur_pos = 0;
int cur_line = 0;
while (cur_pos < total_size)
{
while (
cur_pos < total_size &&
(
is_remark(data[cur_pos], cur_pos) ||
is_space(data[cur_pos])
))
{
if (data[cur_pos] == '\n') cur_line++;
cur_pos++;
}
if (cur_pos == total_size) break;
if (is_operator(data[cur_pos]))
{
tokens.push_back(CL_Token(std::string(&data[cur_pos], 1), cur_pos, cur_line));
cur_pos++;
}
else
{
int temp_pos = cur_pos;
if (data[temp_pos] == '"')
{
int num_chars = 0;
temp_pos++;
while (temp_pos < total_size)
{
if (data[temp_pos] == '"')
{
if (temp_pos+1>=total_size || data[temp_pos+1] != '"') break;
else
{
temp_pos++;
}
}
temp_pos++;
num_chars++;
}
if (temp_pos == total_size)
{
write_error("Missing '""' following '""'-begin");
break;
}
char *temp = new char[num_chars+1];
temp[num_chars] = 0;
int ofs = 1;
for (int i=0;i<num_chars;i++)
{
temp[i] = data[cur_pos+ofs+i];
if (data[cur_pos+ofs+i] == '"')
{
ofs++;
}
}
cur_pos = temp_pos+1;
tokens.push_back(CL_Token(std::string(temp), cur_pos, cur_line));
delete temp;
}
else
{
while (temp_pos < total_size &&
!is_space(data[temp_pos]) &&
!is_operator(data[temp_pos]) &&
!is_remark(data[temp_pos], cur_pos))
{
temp_pos++;
}
int tok_size = temp_pos-cur_pos;
tokens.push_back(CL_Token(std::string(&data[cur_pos], tok_size), cur_pos, cur_line));
cur_pos += tok_size;
}
}
}
}
std::string CL_ComponentTokenizer::get_next_token(int *offset)
{
peek_pos = 0;
last_line = tokens[0].line;
std::string token = tokens[0].token;
if (offset != NULL) *offset = tokens[0].offset;
tokens.pop_front();
return token;
}
std::string CL_ComponentTokenizer::peek_next_token(int *offset)
{
if (peek_pos >= (int) tokens.size())
{
return "";
}
if (offset != NULL) *offset = tokens[peek_pos].offset;
return tokens[peek_pos++].token;
}
void CL_ComponentTokenizer::pop_to_peek()
{
while (peek_pos > 0)
{
peek_pos--;
tokens.pop_front();
}
}
std::string CL_ComponentTokenizer::write_error(std::string err_msg)
{
CL_String err;
err << "Error occured during read of config file '" <<
filename.c_str() << "' (line " << last_line << "): " << err_msg.c_str();
return err;
}
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