9174f65e54
friends. Since names and other strings are now StrBufs in many places, code for output had to be changed. Added support for string literals to StrBuf. git-svn-id: svn://svn.cc65.org/cc65/trunk@3825 b7a2c559-68d2-44c3-8de9-860c34a00d81
147 lines
5 KiB
C
147 lines
5 KiB
C
/*****************************************************************************/
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/* */
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/* enum.c */
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/* */
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/* .ENUM command */
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/* */
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/* */
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/* */
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/* (C) 2003-2008 Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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/* common */
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#include "addrsize.h"
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/* ca65 */
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#include "condasm.h"
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#include "enum.h"
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#include "error.h"
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#include "expr.h"
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#include "nexttok.h"
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#include "scanner.h"
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#include "symbol.h"
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#include "symtab.h"
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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void DoEnum (void)
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/* Handle the .ENUM command */
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{
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/* Start at zero */
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long Offs = 0;
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ExprNode* BaseExpr = GenLiteral0 ();
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/* Check for a name */
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int Anon = (Tok != TOK_IDENT);
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if (!Anon) {
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/* Enter a new scope, then skip the name */
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SymEnterLevel (&SVal, ST_ENUM, ADDR_SIZE_ABS);
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NextTok ();
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}
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/* Test for end of line */
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ConsumeSep ();
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/* Read until end of struct */
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while (Tok != TOK_ENDENUM && Tok != TOK_EOF) {
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SymEntry* Sym;
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ExprNode* EnumExpr;
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/* Skip empty lines */
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if (Tok == TOK_SEP) {
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NextTok ();
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continue;
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}
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/* The format is "identifier [ = value ]" */
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if (Tok != TOK_IDENT) {
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/* Maybe it's a conditional? */
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if (!CheckConditionals ()) {
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ErrorSkip ("Identifier expected");
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}
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continue;
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}
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/* We have an identifier, generate a symbol */
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Sym = SymFind (CurrentScope, &SVal, SYM_ALLOC_NEW);
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/* Skip the member name */
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NextTok ();
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/* Check for an assignment */
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if (Tok == TOK_EQ) {
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/* Skip the equal sign */
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NextTok ();
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/* Read the new expression */
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EnumExpr = Expression ();
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/* Reset the base expression and the offset */
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FreeExpr (BaseExpr);
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BaseExpr = CloneExpr (EnumExpr);
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Offs = 0;
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} else {
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/* No assignment, use last value + 1 */
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EnumExpr = GenAddExpr (CloneExpr (BaseExpr), GenLiteralExpr (Offs));
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}
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/* Assign the value to the enum member */
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SymDef (Sym, EnumExpr, ADDR_SIZE_DEFAULT, SF_NONE);
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/* Increment the offset for the next member */
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++Offs;
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/* Expect end of line */
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ConsumeSep ();
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}
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/* If this is not an anon enum, leave its scope */
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if (!Anon) {
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/* Close the enum scope */
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SymLeaveLevel ();
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}
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/* End of enum definition */
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Consume (TOK_ENDENUM, "`.ENDENUM' expected");
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/* Free the base expression */
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FreeExpr (BaseExpr);
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}
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