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Fixed a problem with {} enclosed token lists and implemented them for

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.blank and .tcount.


git-svn-id: svn://svn.cc65.org/cc65/trunk@3014 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz 2004-05-09 20:24:51 +00:00
parent fdb685b874
commit b10b7cd3e8
5 changed files with 70 additions and 74 deletions
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87
src/ca65/expr.c
View File

@ -323,31 +323,35 @@ static ExprNode* FuncBankByte (void)
static ExprNode* FuncBlank (void)
/* Handle the .BLANK builtin function */
{
int Result = 1;
/* Assume no tokens if the closing brace follows (this is not correct in
* all cases, since the token may be the closing brace, but this will
* give a syntax error anyway and may not be handled by .BLANK.
/* We have a list of tokens that ends with the closing paren. Skip
* the tokens, and count them. Allow optionally curly braces.
*/
if (Tok != TOK_RPAREN) {
/* Skip any tokens */
int Braces = 0;
while (!TokIsSep (Tok)) {
if (Tok == TOK_LPAREN) {
++Braces;
} else if (Tok == TOK_RPAREN) {
if (Braces == 0) {
/* Done */
break;
} else {
--Braces;
}
}
NextTok ();
enum Token Term = GetTokListTerm (TOK_RPAREN);
unsigned Count = 0;
while (Tok != Term) {
/* Check for end of line or end of input. Since the calling function
* will check for the closing paren, we don't need to print an error
* here, just bail out.
*/
if (TokIsSep (Tok)) {
break;
}
Result = 0;
/* One more token */
++Count;
/* Skip the token */
NextTok ();
}
return GenLiteralExpr (Result);
/* If the list was enclosed in curly braces, skip the closing brace */
if (Term == TOK_RCURLY && Tok == TOK_RCURLY) {
NextTok ();
}
/* Return true if the list was empty */
return GenLiteralExpr (Count == 0);
}
@ -418,7 +422,6 @@ static ExprNode* DoMatch (enum TC EqualityLevel)
/* Handle the .MATCH and .XMATCH builtin functions */
{
int Result;
enum Token Term;
TokNode* Root = 0;
TokNode* Last = 0;
TokNode* Node;
@ -427,12 +430,7 @@ static ExprNode* DoMatch (enum TC EqualityLevel)
* single linked list of tokens including attributes. The list is
* either enclosed in curly braces, or terminated by a comma.
*/
if (Tok == TOK_LCURLY) {
NextTok ();
Term = TOK_RCURLY;
} else {
Term = TOK_COMMA;
}
enum Token Term = GetTokListTerm (TOK_COMMA);
while (Tok != Term) {
/* We may not end-of-line of end-of-file here */
@ -465,15 +463,10 @@ static ExprNode* DoMatch (enum TC EqualityLevel)
}
/* Read the second list which is optionally enclosed in curly braces and
* terminated by the right parenthesis. Compare each token against the
* terminated by the right parenthesis. Compare each token against the
* one in the first list.
*/
if (Tok == TOK_LCURLY) {
NextTok ();
Term = TOK_RCURLY;
} else {
Term = TOK_RPAREN;
}
Term = GetTokListTerm (TOK_RPAREN);
Result = 1;
Node = Root;
while (Tok != Term) {
@ -716,11 +709,11 @@ static ExprNode* FuncTCount (void)
/* Handle the .TCOUNT function */
{
/* We have a list of tokens that ends with the closing paren. Skip
* the tokens, handling nested braces and count them.
* the tokens, and count them. Allow optionally curly braces.
*/
int Count = 0;
unsigned Parens = 0;
while (Parens != 0 || Tok != TOK_RPAREN) {
enum Token Term = GetTokListTerm (TOK_RPAREN);
int Count = 0;
while (Tok != Term) {
/* Check for end of line or end of input. Since the calling function
* will check for the closing paren, we don't need to print an error
@ -733,17 +726,15 @@ static ExprNode* FuncTCount (void)
/* One more token */
++Count;
/* Keep track of the nesting level */
switch (Tok) {
case TOK_LPAREN: ++Parens; break;
case TOK_RPAREN: --Parens; break;
default: break;
}
/* Skip the token */
NextTok ();
}
/* If the list was enclosed in curly braces, skip the closing brace */
if (Term == TOK_RCURLY && Tok == TOK_RCURLY) {
NextTok ();
}
/* Return the number of tokens */
return GenLiteralExpr (Count);
}
@ -760,7 +751,7 @@ static ExprNode* FuncXMatch (void)
static ExprNode* Function (ExprNode* (*F) (void))
/* Handle builtin functions */
{
{
ExprNode* E;
/* Skip the keyword */

15
src/ca65/macro.c
View File

@ -677,12 +677,7 @@ static void StartExpClassic (Macro* M)
}
/* The macro may optionally be enclosed in curly braces */
if (Tok == TOK_LCURLY) {
NextTok ();
Term = TOK_RCURLY;
} else {
Term = TOK_COMMA;
}
Term = GetTokListTerm (TOK_COMMA);
/* Read tokens for one parameter, accept empty params */
Last = 0;
@ -760,16 +755,10 @@ static void StartExpDefine (Macro* M)
/* Read the actual parameters */
while (Count--) {
enum Token Term;
TokNode* Last;
/* The macro may optionally be enclosed in curly braces */
if (Tok == TOK_LCURLY) {
NextTok ();
Term = TOK_RCURLY;
} else {
Term = TOK_COMMA;
}
enum Token Term = GetTokListTerm (TOK_COMMA);
/* Check if there is really a parameter */
if (TokIsSep (Tok) || Tok == Term) {

11
src/ca65/nexttok.c
View File

@ -71,22 +71,15 @@ static TokList* CollectTokens (unsigned Start, unsigned Count)
* return this token list.
*/
{
enum Token Term;
unsigned Current;
/* Create the token list */
TokList* List = NewTokList ();
/* Determine if the list is enclosed in curly braces. */
if (Tok == TOK_LCURLY) {
NextTok ();
Term = TOK_RCURLY;
} else {
Term = TOK_LCURLY;
}
enum Token Term = GetTokListTerm (TOK_RPAREN);
/* Read the token list */
Current = 0;
unsigned Current = 0;
while (Tok != Term) {
/* Check for end of line or end of input */

17
src/ca65/toklist.c
View File

@ -42,6 +42,7 @@
/* ca65 */
#include "error.h"
#include "istack.h"
#include "nexttok.h"
#include "scanner.h"
#include "toklist.h"
@ -174,6 +175,22 @@ void FreeTokList (TokList* List)
enum Token GetTokListTerm (enum Token Term)
/* Determine if the following token list is enclosed in curly braces. This is
* the case if the next token is the opening brace. If so, skip it and return
* a closing brace, otherwise return Term.
*/
{
if (Tok == TOK_LCURLY) {
NextTok ();
return TOK_RCURLY;
} else {
return Term;
}
}
void AddCurTok (TokList* List)
/* Add the current token to the token list */
{

14
src/ca65/toklist.h
View File

@ -6,10 +6,10 @@
/* */
/* */
/* */
/* (C) 2000 Ullrich von Bassewitz */
/* Wacholderweg 14 */
/* D-70597 Stuttgart */
/* EMail: uz@musoftware.de */
/* (C) 2000-2004 Ullrich von Bassewitz */
/* Römerstraße 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
@ -109,6 +109,12 @@ TokList* NewTokList (void);
void FreeTokList (TokList* T);
/* Delete the token list including all token nodes */
enum Token GetTokListTerm (enum Token Term);
/* Determine if the following token list is enclosed in curly braces. This is
* the case if the next token is the opening brace. If so, skip it and return
* a closing brace, otherwise return Term.
*/
void AddCurTok (TokList* T);
/* Add the current token to the token list */