ref: a7ed30404bc98c13ac89721ab54e1d702d4e0b39
dir: /src/scriplib.c/
/*
Copyright (C) 1994-1995 Apogee Software, Ltd.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// scriplib.c
#include <fcntl.h>
#include <string.h>
#include "rt_def.h"
#include "scriplib.h"
#include "rt_util.h"
/*
=============================================================================
PARSING STUFF
=============================================================================
*/
char token[MAXTOKEN];
char name[MAXTOKEN*2];
char scriptfilename[512];
char *scriptbuffer,*script_p,*scriptend_p;
int scriptline;
boolean endofscript;
boolean tokenready; // only true if UnGetToken was just called
/*
==============
=
= LoadScriptFile
=
==============
*/
void LoadScriptFile (char *filename)
{
long size;
size = LoadFile (filename, (void **)&scriptbuffer);
snprintf(scriptfilename, sizeof(scriptfilename), "%s", filename);
script_p = scriptbuffer;
scriptend_p = script_p + size;
scriptline = 1;
endofscript = false;
tokenready = false;
}
/*
==============
=
= UnGetToken
=
= Signals that the current token was not used, and should be reported
= for the next GetToken. Note that
GetToken (true);
UnGetToken ();
GetToken (false);
= could cross a line boundary.
=
==============
*/
void UnGetToken (void)
{
tokenready = true;
}
/*
==============
=
= GetToken
=
==============
*/
void GetToken (boolean crossline)
{
char *token_p;
if (tokenready) // is a token allready waiting?
{
tokenready = false;
return;
}
if (script_p >= scriptend_p)
{
if (!crossline)
Error ("Line %i is incomplete\nin file %s\n",
scriptline,scriptfilename);
endofscript = true;
return;
}
//
// skip space
//
skipspace:
while (*script_p <= 32)
{
if (script_p >= scriptend_p)
{
if (!crossline)
Error ("Line %i is incomplete\nin file %s\n",
scriptline,scriptfilename);
endofscript = true;
return;
}
if (*script_p++ == '\n')
{
if (!crossline)
Error ("Line %i is incomplete\nin file %s\n",
scriptline,scriptfilename);
scriptline++;
}
}
if (script_p >= scriptend_p)
{
if (!crossline)
Error ("Line %i is incomplete\nin file %s\n",
scriptline,scriptfilename);
endofscript = true;
return;
}
if (*script_p == ';') // semicolon is comment field
{
if (!crossline)
Error ("Line %i is incomplete\nin file %s\n",
scriptline,scriptfilename);
while (*script_p++ != '\n')
if (script_p >= scriptend_p)
{
endofscript = true;
return;
}
goto skipspace;
}
//
// copy token
//
token_p = token;
while ( *script_p > 32 && *script_p != ';')
{
*token_p++ = *script_p++;
if (script_p == scriptend_p)
break;
if (token_p == &token[MAXTOKEN])
Error ("Token too large on line %i\nin file %s\n",
scriptline,scriptfilename);
}
*token_p = 0;
}
/*
==============
=
= GetTokenEOL
=
==============
*/
void GetTokenEOL (boolean crossline)
{
char *name_p;
if (tokenready) // is a token allready waiting?
{
tokenready = false;
return;
}
if (script_p >= scriptend_p)
{
if (!crossline)
Error ("Line %i is incomplete\nin file %s\n",
scriptline,scriptfilename);
endofscript = true;
return;
}
//
// skip space
//
skipspace:
while (*script_p <= 32)
{
if (script_p >= scriptend_p)
{
if (!crossline)
Error ("Line %i is incomplete\nin file %s\n",
scriptline,scriptfilename);
endofscript = true;
return;
}
if (*script_p++ == '\n')
{
if (!crossline)
Error ("Line %i is incomplete\nin file %s\n",
scriptline,scriptfilename);
scriptline++;
}
}
if (script_p >= scriptend_p)
{
if (!crossline)
Error ("Line %i is incomplete\nin file %s\n",
scriptline,scriptfilename);
endofscript = true;
return;
}
if (*script_p == ';') // semicolon is comment field
{
if (!crossline)
Error ("Line %i is incomplete\nin file %s\n",
scriptline,scriptfilename);
while (*script_p++ != '\n')
if (script_p >= scriptend_p)
{
endofscript = true;
return;
}
goto skipspace;
}
//
// copy token
//
name_p = name;
while (*script_p >= 32)
{
*name_p++ = *script_p++;
if (script_p == scriptend_p)
break;
if (name_p == &name[MAXTOKEN*2])
Error ("Name too large on line %i\nin file %s\n",
scriptline,scriptfilename);
}
*name_p = 0;
}
/*
==============
=
= TokenAvailable
=
= Returns true if there is another token on the line
=
==============
*/
boolean TokenAvailable (void)
{
char *search_p;
search_p = script_p;
if (search_p >= scriptend_p)
return false;
while ( *search_p <= 32)
{
if (*search_p == '\n')
return false;
search_p++;
if (search_p == scriptend_p)
return false;
}
if (*search_p == ';')
return false;
return true;
}