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//# TableGram.cc: Grammar for table command lines
//# Copyright (C) 1993,1994,1995,1997,1999,2001,2003
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library 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 Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//# $Id$
// TableGram; grammar for table command lines
// This file includes the output files of bison and flex for
// parsing command lines operating on tables.
#include <casacore/tables/TaQL/TableGram.h>
#include <casacore/tables/TaQL/TaQLNode.h>
#include <casacore/tables/TaQL/TaQLNodeDer.h>
#include <casacore/tables/Tables/TableError.h>
#include <casacore/casa/Utilities/MUString.h>
#include <casacore/casa/Quanta/MVAngle.h>
#include <stack>
//# stdlib.h is needed for bison 1.28 and needs to be included here
//# (before the flex/bison files).
//# Bison defines WHERE, which is also defined in LogOrigin.h (which
//# is included in auto-template mode).
//# So undefine WHERE first.
#undef WHERE
#include <casacore/casa/stdlib.h>
//# Let clang and gcc ignore some warnings in bison/flex code.
//# Undef YY_NULL because flex can redefine it slightly differently (giving a warning).
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpragmas"
#pragma GCC diagnostic ignored "-Wdeprecated-register"
#pragma GCC diagnostic ignored "-Wsign-compare"
#include "TableGram.ycc" // bison output
#ifdef YY_NULL
# undef YY_NULL
#endif
#include "TableGram.lcc" // flex output
#pragma GCC diagnostic pop
// Define the yywrap function for flex.
int TableGramwrap()
{
return 1;
}
namespace casacore { //# NAMESPACE CASACORE - BEGIN
//# Declare a file global pointer to a char* for the input string.
static const char* strpTableGram = 0;
static Int posTableGram = 0;
// Define a class to delete the yy_buffer in case of an exception.
class TableGramState {
public:
TableGramState (YY_BUFFER_STATE state)
: itsState (state)
{}
~TableGramState()
{ clear(); }
void clear()
{ if (itsState) {
TableGram_delete_buffer(itsState);
itsState=0;
}
}
YY_BUFFER_STATE state() const
{ return itsState; }
private:
TableGramState (const TableGramState&);
TableGramState& operator= (const TableGramState&);
YY_BUFFER_STATE itsState; //# this is a pointer to yy_buffer_state
};
//# Parse the command.
int tableGramParseCommand (const String& command)
{
// Save current state for re-entrancy.
int sav_yy_start = yy_start;
const char* savStrpTableGram = strpTableGram;
Int savPosTableGram= posTableGram;
YY_BUFFER_STATE sav_state = YY_CURRENT_BUFFER;
// Create a new state buffer for new expression.
TableGramState next (TableGram_create_buffer (TableGramin, YY_BUF_SIZE));
TableGram_switch_to_buffer (next.state());
yy_start = 1;
strpTableGram = command.chars(); // get pointer to command string
posTableGram = 0; // initialize string position
int sts = TableGramparse(); // parse command string
// The current state has to be deleted before switching back to previous.
next.clear();
// Restore previous state.
yy_start = sav_yy_start;
strpTableGram = savStrpTableGram;
posTableGram= savPosTableGram;
TableGram_switch_to_buffer (sav_state);
return sts;
}
//# Give the string position.
Int& tableGramPosition()
{
return posTableGram;
}
//# Get the next input characters for flex.
int tableGramInput (char* buf, int max_size)
{
int nr=0;
while (*strpTableGram != 0) {
if (nr >= max_size) {
break; // get max. max_size char.
}
buf[nr++] = *strpTableGram++;
}
return nr;
}
void TableGramerror (const char*)
{
throw TableGramError (tableGramPosition(), String(TableGramtext));
}
String tableGramRemoveEscapes (const String& in)
{
String out;
int leng = in.length();
for (int i=0; i<leng; i++) {
if (in[i] == '\\') {
i++;
}
out += in[i];
}
return out;
}
String tableGramRemoveEscapesQuotes (const String& in)
{
String out;
char quote = 0;
int leng = in.length();
for (int i=0; i<leng; i++) {
if (quote) {
if (in[i] == quote) {
quote = 0;
} else {
out += in[i];
}
} else if (in[i] == '"' || in[i] == '\'') {
quote = in[i];
} else {
if (in[i] == '\\') {
i++;
}
out += in[i];
}
}
return out;
}
String tableGramRemoveQuotes (const String& in)
{
//# A string is formed as "..."'...''...' etc.
//# All ... parts will be extracted and concatenated into an output string.
String out;
String str = in;
int leng = str.length();
int pos = 0;
while (pos < leng) {
//# Find next occurrence of leading ' or ""
int inx = str.index (str[pos], pos+1);
if (inx < 0) {
throw (TableError ("ill-formed quoted string: " + str));
}
out += str.at (pos+1, inx-pos-1); // add substring
pos = inx+1;
}
return out;
}
Double tableGramParseTime (const String& in)
{
Quantity res;
//# Skip a possible leading / which acts as an escape character.
String val(in);
if (val.length() > 0 && val[0] == '/') {
val = val.after(0);
}
if (! MVAngle::read (res, val)) {
throw (TableError ("invalid time/pos string " + val));
}
return MVAngle(res).radian();
}
MVTime tableGramParseDateTime (const String& in)
{
MUString str (in);
Quantity res;
if (! MVTime::read (res, str)) {
throw (TableError ("invalid date string " + in));
}
return MVTime(res);
}
} //# NAMESPACE CASACORE - END
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