mirror of
https://github.com/ZDoom/gzdoom.git
synced 2024-11-23 12:32:34 +00:00
352 lines
7.9 KiB
C++
352 lines
7.9 KiB
C++
/*
|
|
** parsecontext.cpp
|
|
** Base class for Lemon-based parsers
|
|
**
|
|
**---------------------------------------------------------------------------
|
|
** Copyright 1998-2008 Randy Heit
|
|
** Copyright 2008 Christoph Oelckers
|
|
** All rights reserved.
|
|
**
|
|
** Redistribution and use in source and binary forms, with or without
|
|
** modification, are permitted provided that the following conditions
|
|
** are met:
|
|
**
|
|
** 1. Redistributions of source code must retain the above copyright
|
|
** notice, this list of conditions and the following disclaimer.
|
|
** 2. Redistributions in binary form must reproduce the above copyright
|
|
** notice, this list of conditions and the following disclaimer in the
|
|
** documentation and/or other materials provided with the distribution.
|
|
** 3. The name of the author may not be used to endorse or promote products
|
|
** derived from this software without specific prior written permission.
|
|
**
|
|
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
**---------------------------------------------------------------------------
|
|
**
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include "w_wad.h"
|
|
#include "parsecontext.h"
|
|
#include "p_lnspec.h"
|
|
|
|
|
|
//==========================================================================
|
|
//
|
|
//
|
|
//
|
|
//==========================================================================
|
|
void FParseContext::AddSym (char *sym, int val)
|
|
{
|
|
FParseSymbol syme;
|
|
syme.Value = val;
|
|
strncpy (syme.Sym, sym, 79);
|
|
syme.Sym[79]=0;
|
|
symbols.Push(syme);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
//
|
|
//
|
|
//==========================================================================
|
|
bool FParseContext::FindSym (char *sym, FParseSymbol **val)
|
|
{
|
|
for(unsigned i=0;i<symbols.Size(); i++)
|
|
{
|
|
if (strcmp (symbols[i].Sym, sym) == 0)
|
|
{
|
|
*val = &symbols[i];
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
//==========================================================================
|
|
//
|
|
//
|
|
//
|
|
//==========================================================================
|
|
int FParseContext::GetToken (char *&sourcep, FParseToken *yylval)
|
|
{
|
|
char token[80];
|
|
int toksize;
|
|
int c;
|
|
|
|
loop:
|
|
while (isspace (c = *sourcep++) && c != 0)
|
|
{
|
|
if (c == '\n')
|
|
SourceLine++;
|
|
}
|
|
|
|
if (c == 0)
|
|
{
|
|
return 0;
|
|
}
|
|
if (isdigit (c))
|
|
{
|
|
int buildup = c - '0';
|
|
if (c == '0')
|
|
{
|
|
c = *sourcep++;
|
|
if (c == 'x' || c == 'X')
|
|
{
|
|
yylval->val = (int)strtol(sourcep, &sourcep, 16);
|
|
return TokenTrans[NUM];
|
|
}
|
|
else
|
|
{
|
|
sourcep--;
|
|
}
|
|
}
|
|
char *endp;
|
|
|
|
sourcep--;
|
|
yylval->val = (int)strtol(sourcep, &endp, 10);
|
|
if (*endp == '.')
|
|
{
|
|
// It's a float
|
|
yylval->fval = strtod(sourcep, &sourcep);
|
|
return TokenTrans[FLOATVAL];
|
|
}
|
|
else
|
|
{
|
|
sourcep = endp;
|
|
return TokenTrans[NUM];
|
|
}
|
|
}
|
|
if (isalpha (c))
|
|
{
|
|
int buildup = 0;
|
|
|
|
token[0] = c;
|
|
toksize = 1;
|
|
while (toksize < 79 && (isalnum (c = *sourcep++) || c == '_'))
|
|
{
|
|
token[toksize++] = c;
|
|
}
|
|
token[toksize] = 0;
|
|
if (toksize == 79 && isalnum (c))
|
|
{
|
|
while (isalnum (c = *sourcep++))
|
|
;
|
|
}
|
|
sourcep--;
|
|
if (FindToken (token, &buildup))
|
|
{
|
|
return buildup;
|
|
}
|
|
if (FindSym (token, &yylval->symval))
|
|
{
|
|
yylval->val = yylval->symval->Value;
|
|
return TokenTrans[NUM];
|
|
}
|
|
if ((yylval->val = P_FindLineSpecial(token)) != 0)
|
|
{
|
|
return TokenTrans[NUM];
|
|
}
|
|
strcpy (yylval->sym, token);
|
|
return TokenTrans[SYM];
|
|
}
|
|
if (c == '/')
|
|
{
|
|
c = *sourcep++;
|
|
if (c == '*')
|
|
{
|
|
for (;;)
|
|
{
|
|
while ((c = *sourcep++) != '*' && c != 0)
|
|
{
|
|
if (c == '\n')
|
|
SourceLine++;
|
|
}
|
|
if (c == 0)
|
|
return 0;
|
|
if ((c = *sourcep++) == '/')
|
|
goto loop;
|
|
if (c == 0)
|
|
return 0;
|
|
sourcep--;
|
|
}
|
|
}
|
|
else if (c == '/')
|
|
{
|
|
while ((c = *sourcep++) != '\n' && c != 0)
|
|
;
|
|
if (c == '\n')
|
|
SourceLine++;
|
|
else if (c == EOF)
|
|
return 0;
|
|
goto loop;
|
|
}
|
|
else
|
|
{
|
|
sourcep--;
|
|
return TokenTrans[DIVIDE];
|
|
}
|
|
}
|
|
if (c == '"')
|
|
{
|
|
int tokensize = 0;
|
|
while ((c = *sourcep++) != '"' && c != 0)
|
|
{
|
|
yylval->string[tokensize++] = c;
|
|
}
|
|
yylval->string[tokensize] = 0;
|
|
return TokenTrans[STRING];
|
|
}
|
|
if (c == '|')
|
|
{
|
|
c = *sourcep++;
|
|
if (c == '=')
|
|
return TokenTrans[OR_EQUAL];
|
|
sourcep--;
|
|
return TokenTrans[OR];
|
|
}
|
|
if (c == '<')
|
|
{
|
|
c = *sourcep++;
|
|
if (c == '<')
|
|
{
|
|
c = *sourcep++;
|
|
if (c == '=')
|
|
{
|
|
return TokenTrans[LSHASSIGN];
|
|
}
|
|
sourcep--;
|
|
return 0;
|
|
}
|
|
c--;
|
|
return 0;
|
|
}
|
|
if (c == '>')
|
|
{
|
|
c = *sourcep++;
|
|
if (c == '>')
|
|
{
|
|
c = *sourcep++;
|
|
if (c == '=')
|
|
{
|
|
return TokenTrans[RSHASSIGN];
|
|
}
|
|
sourcep--;
|
|
return 0;
|
|
}
|
|
c--;
|
|
return 0;
|
|
}
|
|
if (c == '#')
|
|
{
|
|
if (!strnicmp(sourcep, "include", 7))
|
|
{
|
|
sourcep+=7;
|
|
return TokenTrans[INCLUDE];
|
|
}
|
|
if (!strnicmp(sourcep, "define", 6))
|
|
{
|
|
sourcep+=6;
|
|
return TokenTrans[DEFINE];
|
|
}
|
|
}
|
|
switch (c)
|
|
{
|
|
case '^': return TokenTrans[XOR];
|
|
case '&': return TokenTrans[AND];
|
|
case '-': return TokenTrans[MINUS];
|
|
case '+': return TokenTrans[PLUS];
|
|
case '*': return TokenTrans[MULTIPLY];
|
|
case '%': return TokenTrans[MODULUS];
|
|
case '(': return TokenTrans[LPAREN];
|
|
case ')': return TokenTrans[RPAREN];
|
|
case ',': return TokenTrans[COMMA];
|
|
case '{': return TokenTrans[LBRACE];
|
|
case '}': return TokenTrans[RBRACE];
|
|
case '=': return TokenTrans[EQUALS];
|
|
case ';': return TokenTrans[SEMICOLON];
|
|
case ':': return TokenTrans[COLON];
|
|
case '[': return TokenTrans[LBRACKET];
|
|
case ']': return TokenTrans[RBRACKET];
|
|
default: return 0;
|
|
}
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
//
|
|
//
|
|
//==========================================================================
|
|
int FParseContext::PrintError (const char *s)
|
|
{
|
|
if (SourceFile != NULL)
|
|
Printf ("%s, line %d: %s\n", SourceFile, SourceLine, s);
|
|
else
|
|
Printf ("%s\n", s);
|
|
return 0;
|
|
}
|
|
|
|
|
|
//==========================================================================
|
|
//
|
|
//
|
|
//
|
|
//==========================================================================
|
|
|
|
void FParseContext::ParseLump(const char *lumpname)
|
|
{
|
|
int tokentype;
|
|
int SavedSourceLine = SourceLine;
|
|
const char *SavedSourceFile = SourceFile;
|
|
FParseToken token;
|
|
|
|
int lumpno = Wads.CheckNumForFullName(lumpname, true);
|
|
|
|
if (lumpno == -1)
|
|
{
|
|
Printf ("%s, line %d: Lump '%s' not found\n", SourceFile, SourceLine, lumpname);
|
|
return;
|
|
}
|
|
|
|
// Read the lump into a buffer and add a 0-terminator
|
|
int lumplen = Wads.LumpLength(lumpno);
|
|
char *lumpdata = new char[lumplen+1];
|
|
Wads.ReadLump(lumpno, lumpdata);
|
|
lumpdata[lumplen] = 0;
|
|
|
|
SourceLine = 0;
|
|
SourceFile = lumpname;
|
|
|
|
char *sourcep = lumpdata;
|
|
while ( (tokentype = GetToken(sourcep, &token)) )
|
|
{
|
|
// It is much easier to handle include statements outside the main parser.
|
|
if (tokentype == TokenTrans[INCLUDE])
|
|
{
|
|
if (GetToken(sourcep, &token) != TokenTrans[STRING])
|
|
{
|
|
Printf("%s, line %d: Include: String parameter expected\n", SourceFile, SourceLine);
|
|
return;
|
|
}
|
|
ParseLump(token.string);
|
|
}
|
|
else
|
|
{
|
|
Parse(pParser, tokentype, token, this);
|
|
}
|
|
}
|
|
delete [] lumpdata;
|
|
SourceLine = SavedSourceLine;
|
|
SourceFile = SavedSourceFile;
|
|
}
|
|
|