mirror of https://github.com/cc65/cc65.git
154 lines
5.4 KiB
C
154 lines
5.4 KiB
C
/*****************************************************************************/
|
|
/* */
|
|
/* enum.c */
|
|
/* */
|
|
/* .ENUM command */
|
|
/* */
|
|
/* */
|
|
/* */
|
|
/* (C) 2003-2011, Ullrich von Bassewitz */
|
|
/* Roemerstrasse 52 */
|
|
/* D-70794 Filderstadt */
|
|
/* EMail: uz@cc65.org */
|
|
/* */
|
|
/* */
|
|
/* This software is provided 'as-is', without any expressed or implied */
|
|
/* warranty. In no event will the authors be held liable for any damages */
|
|
/* arising from the use of this software. */
|
|
/* */
|
|
/* Permission is granted to anyone to use this software for any purpose, */
|
|
/* including commercial applications, and to alter it and redistribute it */
|
|
/* freely, subject to the following restrictions: */
|
|
/* */
|
|
/* 1. The origin of this software must not be misrepresented; you must not */
|
|
/* claim that you wrote the original software. If you use this software */
|
|
/* in a product, an acknowledgment in the product documentation would be */
|
|
/* appreciated but is not required. */
|
|
/* 2. Altered source versions must be plainly marked as such, and must not */
|
|
/* be misrepresented as being the original software. */
|
|
/* 3. This notice may not be removed or altered from any source */
|
|
/* distribution. */
|
|
/* */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
/* common */
|
|
#include "addrsize.h"
|
|
#include "scopedefs.h"
|
|
|
|
/* ca65 */
|
|
#include "condasm.h"
|
|
#include "enum.h"
|
|
#include "error.h"
|
|
#include "expr.h"
|
|
#include "macro.h"
|
|
#include "nexttok.h"
|
|
#include "scanner.h"
|
|
#include "symbol.h"
|
|
#include "symtab.h"
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
/* Code */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
void DoEnum (void)
|
|
/* Handle the .ENUM command */
|
|
{
|
|
/* Start at zero */
|
|
long Offs = 0;
|
|
ExprNode* BaseExpr = GenLiteral0 ();
|
|
|
|
/* Check for a name */
|
|
int Anon = (CurTok.Tok != TOK_IDENT);
|
|
if (!Anon) {
|
|
/* Enter a new scope, then skip the name */
|
|
SymEnterLevel (&CurTok.SVal, SCOPE_ENUM, ADDR_SIZE_ABS, 0);
|
|
NextTok ();
|
|
}
|
|
|
|
/* Test for end of line */
|
|
ConsumeSep ();
|
|
|
|
/* Read until end of struct */
|
|
while (CurTok.Tok != TOK_ENDENUM && CurTok.Tok != TOK_EOF) {
|
|
|
|
Macro* M;
|
|
SymEntry* Sym;
|
|
ExprNode* EnumExpr;
|
|
|
|
/* Skip empty lines */
|
|
if (CurTok.Tok == TOK_SEP) {
|
|
NextTok ();
|
|
continue;
|
|
}
|
|
|
|
/* The format is "identifier [ = value ]" */
|
|
if (CurTok.Tok != TOK_IDENT) {
|
|
/* Maybe it's a conditional? */
|
|
if (!CheckConditionals ()) {
|
|
ErrorSkip ("Identifier expected");
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/* We have an identifier. Is it a macro? */
|
|
if ((M = FindMacro (&CurTok.SVal)) != 0) {
|
|
MacExpandStart (M);
|
|
continue;
|
|
}
|
|
|
|
/* We have an identifier, generate a symbol */
|
|
Sym = SymFind (CurrentScope, &CurTok.SVal, SYM_ALLOC_NEW);
|
|
|
|
/* Skip the member name */
|
|
NextTok ();
|
|
|
|
/* Check for an assignment */
|
|
if (CurTok.Tok == TOK_EQ) {
|
|
|
|
/* Skip the equal sign */
|
|
NextTok ();
|
|
|
|
/* Read the new expression */
|
|
EnumExpr = Expression ();
|
|
|
|
/* Reset the base expression and the offset */
|
|
FreeExpr (BaseExpr);
|
|
BaseExpr = CloneExpr (EnumExpr);
|
|
Offs = 0;
|
|
|
|
} else {
|
|
|
|
/* No assignment, use last value + 1 */
|
|
EnumExpr = GenAddExpr (CloneExpr (BaseExpr), GenLiteralExpr (Offs));
|
|
|
|
}
|
|
|
|
/* Assign the value to the enum member */
|
|
SymDef (Sym, EnumExpr, ADDR_SIZE_DEFAULT, SF_NONE);
|
|
|
|
/* Increment the offset for the next member */
|
|
++Offs;
|
|
|
|
/* Expect end of line */
|
|
ConsumeSep ();
|
|
}
|
|
|
|
/* If this is not an anon enum, leave its scope */
|
|
if (!Anon) {
|
|
/* Close the enum scope */
|
|
SymLeaveLevel ();
|
|
}
|
|
|
|
/* End of enum definition */
|
|
Consume (TOK_ENDENUM, "'.ENDENUM' expected");
|
|
|
|
/* Free the base expression */
|
|
FreeExpr (BaseExpr);
|
|
}
|