102 lines
2.1 KiB
C++
102 lines
2.1 KiB
C++
// Copyright (C) 2006, Ondra Kamenik
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// $Id: matrix_parser.cpp 2269 2008-11-23 14:33:22Z michel $
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#include "parser_exception.h"
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#include "matrix_parser.h"
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#include "location.h"
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#include "matrix_tab.hh"
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#include <cstring>
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using namespace ogp;
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/** A global symbol for passing info to the MatrixParser from
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* matrix_parse(). */
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MatrixParser* mparser;
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/** The declaration of functions defined in matrix_ll.cc and
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* matrix_tab.cc generated from matrix.lex and matrix.y. */
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void* matrix__scan_buffer(char*, size_t);
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void matrix__destroy_buffer(void*);
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int matrix_parse();
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extern ogp::location_type matrix_lloc;
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void MatrixParser::parse(int length, const char* stream)
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{
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// reinitialize the object
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data.clear();
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row_lengths.clear();
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nc = 0;
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// allocate temporary buffer and parse
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char* buffer = new char[length+2];
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strncpy(buffer, stream, length);
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buffer[length] = '\0';
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buffer[length+1] = '\0';
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matrix_lloc.off = 0;
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matrix_lloc.ll = 0;
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void* p = matrix__scan_buffer(buffer, (unsigned int)length+2);
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mparser = this;
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matrix_parse();
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delete [] buffer;
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matrix__destroy_buffer(p);
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}
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void MatrixParser::add_item(double v)
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{
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data.push_back(v);
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if (row_lengths.size() == 0)
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row_lengths.push_back(0);
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(row_lengths.back())++;
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if (row_lengths.back() > nc)
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nc = row_lengths.back();
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}
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void MatrixParser::start_row()
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{
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row_lengths.push_back(0);
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}
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void MatrixParser::error(const char* mes) const
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{
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throw ParserException(mes, matrix_lloc.off);
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}
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int MatrixParser::find_first_non_empty_row(int start) const
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{
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int r = start;
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while (r < (int)row_lengths.size() && row_lengths[r] == 0)
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r++;
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return r;
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}
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MPIterator MatrixParser::begin() const
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{
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MPIterator it(*this);
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return it;
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}
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MPIterator MatrixParser::end() const
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{
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MPIterator it(*this, "end");
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return it;
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}
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MPIterator::MPIterator(const MatrixParser& mp)
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: p(&mp), i(0), c(0), r(mp.find_first_non_empty_row())
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{}
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MPIterator::MPIterator(const MatrixParser& mp, const char* dummy)
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: p(&mp), i(mp.data.size()), c(0), r(mp.row_lengths.size())
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{}
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MPIterator& MPIterator::operator++()
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{
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i++;
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c++;
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if (p->row_lengths[r] <= c) {
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c = 0;
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r = p->find_first_non_empty_row(r+1);
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}
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return *this;
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}
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