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Add a new feature "ubiquitous_idents" that allows the use of instructions as

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identifiers and macro names.


git-svn-id: svn://svn.cc65.org/cc65/trunk@2981 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz 2004-04-20 12:49:36 +00:00
parent 0eba6f615f
commit c3d510a9bc
8 changed files with 57 additions and 30 deletions
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4
src/ca65/feature.c
View File

@ -6,7 +6,7 @@
/* */
/* */
/* */
/* (C) 2000-2003 Ullrich von Bassewitz */
/* (C) 2000-2004 Ullrich von Bassewitz */
/* Römerstraße 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
@ -58,6 +58,7 @@ static const char* FeatureKeys[FEAT_COUNT] = {
"leading_dot_in_identifiers",
"pc_assignment",
"missing_char_term",
"ubiquitous_idents",
};
@ -109,6 +110,7 @@ feature_t SetFeature (const char* Key)
case FEAT_LEADING_DOT_IN_IDENTIFIERS: LeadingDotInIdents= 1; break;
case FEAT_PC_ASSIGNMENT: PCAssignment = 1; break;
case FEAT_MISSING_CHAR_TERM: MissingCharTerm = 1; break;
case FEAT_UBIQUITOUS_IDENTS: UbiquitousIdents = 1; break;
default: /* Keep gcc silent */ break;
}

1
src/ca65/feature.h
View File

@ -55,6 +55,7 @@ typedef enum {
FEAT_LEADING_DOT_IN_IDENTIFIERS,
FEAT_PC_ASSIGNMENT,
FEAT_MISSING_CHAR_TERM,
FEAT_UBIQUITOUS_IDENTS,
/* Special value: Number of features available */
FEAT_COUNT

1
src/ca65/global.c
View File

@ -75,6 +75,7 @@ unsigned char DollarInIdents = 0; /* Allow '$' in identifiers */
unsigned char LeadingDotInIdents = 0; /* Allow '.' to start an identifier */
unsigned char PCAssignment = 0; /* Allow "* = $XXX" or "$ = $XXX" */
unsigned char MissingCharTerm = 0; /* Allow lda #'a (no closing term) */
unsigned char UbiquitousIdents = 0; /* Allow ubiquitous identifiers */
/* Misc stuff */
const char Copyright[] = "(C) Copyright 1998-2004 Ullrich von Bassewitz";

3
src/ca65/global.h
View File

@ -6,7 +6,7 @@
/* */
/* */
/* */
/* (C) 1998-2003 Ullrich von Bassewitz */
/* (C) 1998-2004 Ullrich von Bassewitz */
/* Römerstraße 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
@ -72,6 +72,7 @@ extern unsigned char DollarInIdents; /* Allow '$' in identifiers */
extern unsigned char LeadingDotInIdents; /* Allow '.' to start an identifier */
extern unsigned char PCAssignment; /* Allow "* = $XXX" or "$ = $XXX" */
extern unsigned char MissingCharTerm; /* Allow lda #'a (no closing term) */
extern unsigned char UbiquitousIdents; /* Allow ubiquitous identifiers */
/* Misc stuff */
extern const char Copyright[]; /* Copyright string */

14
src/ca65/macro.c
View File

@ -6,7 +6,7 @@
/* */
/* */
/* */
/* (C) 1998-2003 Ullrich von Bassewitz */
/* (C) 1998-2004 Ullrich von Bassewitz */
/* Römerstraße 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
@ -46,6 +46,7 @@
#include "condasm.h"
#include "error.h"
#include "global.h"
#include "instr.h"
#include "istack.h"
#include "nexttok.h"
#include "pseudo.h"
@ -333,6 +334,13 @@ void MacDef (unsigned Style)
Error ("Identifier expected");
MacSkipDef (Style);
return;
} else if (!UbiquitousIdents && FindInstruction (SVal) >= 0) {
/* The identifier is a name of a 6502 instruction, which is not
* allowed if not explicitly enabled.
*/
Error ("Cannot use an instruction as macro name");
MacSkipDef (Style);
return;
}
/* Did we already define that macro? */
@ -381,7 +389,7 @@ void MacDef (unsigned Style)
while (1) {
if (strcmp (List->Id, SVal) == 0) {
Error ("Duplicate symbol `%s'", SVal);
}
}
if (List->Next == 0) {
break;
} else {
@ -663,7 +671,7 @@ static void StartExpClassic (Macro* M)
/* Check for maximum parameter count */
if (E->ParamCount >= M->ParamCount) {
Error ("Too many macro parameters");
SkipUntilSep ();
SkipUntilSep ();
break;
}

47
src/ca65/main.c
View File

@ -375,26 +375,44 @@ static void DoPCAssign (void)
static void OneLine (void)
/* Assemble one line */
{
Segment* Seg = 0;
unsigned long PC = 0;
SymEntry* Sym = 0;
int Done = 0;
Segment* Seg = 0;
unsigned long PC = 0;
SymEntry* Sym = 0;
int Done = 0;
int Macro = 0;
int Instr = -1;
/* Initialize the new listing line if we are actually reading from file
* and not from internally pushed input.
*/
if (!HavePushedInput ()) {
InitListingLine ();
InitListingLine ();
}
if (Tok == TOK_COLON) {
/* An unnamed label */
ULabDef ();
NextTok ();
/* An unnamed label */
ULabDef ();
NextTok ();
}
/* Assemble the line */
if (Tok == TOK_LOCAL_IDENT || (Tok == TOK_IDENT && !IsMacro (SVal))) {
/* If the first token on the line is an identifier, check for a macro or
* an instruction.
*/
if (Tok == TOK_IDENT) {
if (!UbiquitousIdents) {
/* Macros and symbols cannot use instruction names */
Instr = FindInstruction (SVal);
if (Instr < 0) {
Macro = IsMacro (SVal);
}
} else {
/* Macros and symbols may use the names of instructions */
Macro = IsMacro (SVal);
}
}
/* Handle an identifier */
if (Tok == TOK_LOCAL_IDENT || (Tok == TOK_IDENT && Instr < 0 && !Macro)) {
/* Did we have whitespace before the ident? */
int HadWS = WS;
@ -453,12 +471,13 @@ static void OneLine (void)
if (Tok >= TOK_FIRSTPSEUDO && Tok <= TOK_LASTPSEUDO) {
/* A control command */
HandlePseudo ();
} else if (Tok == TOK_MNEMO) {
/* A mnemonic - assemble one instruction */
HandleInstruction (IVal);
} else if (Tok == TOK_IDENT && IsMacro (SVal)) {
} else if (Macro) {
/* A macro expansion */
MacExpandStart ();
} else if (Instr >= 0 ||
(UbiquitousIdents && ((Instr = FindInstruction (SVal)) >= 0))) {
/* A mnemonic - assemble one instruction */
HandleInstruction (Instr);
} else if (PCAssignment && (Tok == TOK_STAR || Tok == TOK_PC)) {
NextTok ();
if (Tok != TOK_EQ) {

14
src/ca65/scanner.c
View File

@ -617,7 +617,7 @@ static unsigned ReadStringConst (int StringTerm)
/* Return the length of the string */
return I;
}
}
@ -844,13 +844,9 @@ Again:
}
}
/* Search for an opcode */
IVal = FindInstruction (SVal);
if (IVal >= 0) {
/* This is a mnemonic */
Tok = TOK_MNEMO;
} else if (IsDefine (SVal)) {
/* This is a define style macro - expand it */
/* Check for define style macro */
if (IsDefine (SVal)) {
/* Macro - expand it */
MacExpandStart ();
goto Restart;
} else {
@ -1122,7 +1118,7 @@ int TokHasSVal (enum Token Tok)
int TokHasIVal (enum Token Tok)
/* Return true if the given token has an attached IVal */
{
return (Tok == TOK_INTCON || Tok == TOK_CHARCON || Tok == TOK_MNEMO);
return (Tok == TOK_INTCON || Tok == TOK_CHARCON);
}

3
src/ca65/scanner.h
View File

@ -6,7 +6,7 @@
/* */
/* */
/* */
/* (C) 1998-2003 Ullrich von Bassewitz */
/* (C) 1998-2004 Ullrich von Bassewitz */
/* Römerstraße 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
@ -57,7 +57,6 @@ enum Token {
TOK_SEP, /* Separator (usually newline) */
TOK_IDENT, /* An identifier */
TOK_LOCAL_IDENT, /* A cheap local identifier */
TOK_MNEMO, /* A mnemonic */
TOK_INTCON, /* Integer constant */
TOK_CHARCON, /* Character constant */