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Numerous modifications

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This commit is contained in:
Curtis F Kaylor 2017-06-26 20:16:23 -04:00
parent bfc84d11c5
commit 9d8195415a
17 changed files with 2093 additions and 346 deletions
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3
asm.c
View File

@ -24,13 +24,14 @@ void setcmt(char *s)
/* Append string to comment */
void addcmt(char *s)
{
strcat(cmtasm, " ");
//strcat(cmtasm, " ");
strcat(cmtasm, s);
}
/* Append character to comment */
void chrcmt(char c)
{
if (cmtasm[0] == 0 && c == ' ') return;
int i = strlen(cmtasm);
cmtasm[i++] = c;
cmtasm[i] = 0;

1357
asm6502.c Normal file
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File diff suppressed because it is too large Load Diff

67
c02.c
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@ -41,8 +41,12 @@ void init()
xstmnt[0] = 0;
nxtwrd[0] = 0;
nxtptr = 0;
vrwrtn = FALSE;
zpaddr = 0;
}
/* Reads and parses the next Word in Source File */
pword()
{
@ -55,11 +59,7 @@ pword()
xstmnt[0] = 0;
else
ERROR("Expected '%s' statement\n", xstmnt, EXIT_FAILURE);
if (wordis("void"))
pdecl(VTVOID); //Parse 'void' declaration
else if (wordis("char"))
pdecl(VTCHAR); //Parse 'char' declaration
else
if (!pmodfr() && !ptype(MTNONE))
pstmnt(); //Parse Statement
}
@ -69,17 +69,22 @@ void pdrctv()
skpchr(); //skip '#'
getwrd(); //read directive into word
DEBUG("Processing directive '%s'\n", word);
if (wordis("define"))
prsdef(); //Parse Define
if (wordis("include"))
if (wordis("DEFINE"))
pdefin(); //Parse Define
else if (wordis("INCLUDE"))
pincfl(); //Parse Include File
else if (wordis("error"))
else if (wordis("ERROR")) {
ERROR("Error \n", 0, EXIT_FAILURE);
}
else if (wordis("PRAGMA"))
pprgma();
else
ERROR("Illegal directive %s encountered\n", word, EXIT_FAILURE);
}
void epilog()
{
vartbl(); //Write Variable Table
if (!vrwrtn) vartbl(); //Write Variable Table
}
/* Compile Source Code*/
@ -117,19 +122,44 @@ void usage()
exit(EXIT_FAILURE);
}
/* Parse Command Line Argument */
int popt(int arg, int argc, char *argv[])
{
char opt; //Option
char optarg[32]; //Option Argument
opt = argv[arg][1];
//if strchr(opt, "i") {
//if (strlen(argv[arg] > 2)
//}
ERROR("Illegal option -%c\n", opt, EXIT_FAILURE);
}
/* Parse Command Line Arguments *
* Sets: srcnam - Source File Name (from first arg) *
* outnam - Output File Name (from optional second arg) */
void pargs(int argc, char *argv[])
{
DEBUG("Parsing %d Arguments\n", argc);
if (argc < 2) usage(); //at least one argument is required
strcpy(srcnam, argv[1]); //set Source File Name to first arg
DEBUG("srcnam set to '%s'\n", srcnam);
if (argc > 2) //if second argument exists
strcpy(outnam, argv[2]); //set Out File Name to second arg
else strcpy(outnam, ""); //else set to null string
DEBUG("outnam set to '%s'\n", outnam);
int arg;
srcnam[0] = 0;
outnam[0] = 0;
DEBUG("Parsing %d arguments\n", argc);
if (argc == 0) usage(); //at least one argument is required
for (arg = 1; arg<argc; arg++) {
DEBUG("Parsing argument %d\n", arg);
if (argv[arg][0] == '-') {
arg = popt(arg, argc, argv);
}
else if (srcnam[0] == 0) {
strcpy(srcnam, argv[arg]); //set Source File Name to first arg
DEBUG("srcnam set to '%s'\n", srcnam);
}
else if (outnam[0] == 0) {
strcpy(outnam, argv[arg]); //set Out File Name to second arg
DEBUG("outnam set to '%s'\n", outnam);
}
else
ERROR("Unexpected argument '%s'\n", argv[arg], EXIT_FAILURE);
}
}
int main(int argc, char *argv[])
@ -147,6 +177,7 @@ int main(int argc, char *argv[])
compile();
logdef();
logvar();
clssrc(); //Close Source File

3
common.h
View File

@ -8,7 +8,7 @@
#define FNAMLEN 255 //Maximum File Name Length
#define LINELEN 255 //Maximum Input/Output Line Length
#define DEFLEN 9 //Maximum Definition Text Length
#define DEFLEN 6 //Maximum Definition Text Length
#define MAXDEF 255 //Maximum Number of Definitions
#define VARLEN 6 //Maximum Variable Length
#define MAXVAR 255 //Maximum Number of Variables
@ -21,6 +21,7 @@
#define CPUOP "PROCESSOR" //Target CPU Pseudo-Operator
#define CPUARG "6502" //Target CPU Operand
#define ORGOP "ORG" //Equate Pseudo-Op
#define EQUOP "EQU" //Equate Pseudo-Op
#define BYTEOP "DC" //Define Byte Pseudo-Op
#define STROP "DS" //Define String Pseudo-Op

6
cond.c
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@ -86,7 +86,7 @@ void prccmp()
}
/* Parse Comparison */
int prscmp(revrse)
int prscmp(int revrse)
{
skpspc();
cmpenc = enccmp(nxtchr); //Encode Comparison Character
@ -131,12 +131,12 @@ void prscnd(char trmntr, int revrse)
revrse = (revrse) ? FALSE: TRUE;
DEBUG("Set revrse to %d\n", revrse);
}
prsxpr(0);
if (!look('*'))
prsxpr(0);
if (look(':'))
prsflg(revrse); //Parse Flag Operator
else
prscmp(revrse); //Parse Comparison Operator
CCMNT(trmntr);
expect(trmntr);
}

181
expr.c
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@ -17,17 +17,18 @@
/* Parse value (constant or identifier) *
* Sets: value - the value (as a string) *
* valtyp - value type */
void prsval()
void prsval(int alwreg)
{
DEBUG("Parsing value\n", 0);
//expdef(); //Check for and expand define -- BROKEN!
skpspc();
if (iscpre())
prscon(0xff); //Parse Constant
prscon(); //Parse Constant
else if (isalph()) {
prsvar(); //Parse Variable
prsvar(alwreg); //Parse Variable
}
else
expctd("constant or variable");
DEBUG("Parsed value of type %d\n", valtyp);
skpspc();
}
@ -37,85 +38,112 @@ void prsval()
void prsidx()
{
expect('[');
prsval();
prsval(TRUE);
DEBUG("Parsed array index '%s'\n", value);
expect(']');
}
/* Parse term in expression *
* Sets: term - the term (as a string) *
* trmtxt - type of term */
/* Check for, Parse, and Process index */
void chkidx()
{
//DEBUG("Checking for Array Index with valtyp=%d\n", valtyp);
if (valtyp == ARRAY) {
prsidx();
if (valtyp == CONSTANT) {
strcat(term, "+");
strcat(term, value);
}
else if (strcmp(value, "Y")==0)
strcat(term, ",Y");
else {
if (strcmp(value, "A")==0)
asmlin("TAX", "");
else if (strcmp(value, "X")!=0)
asmlin("LDX", value);
strcat(term, ",X");
}
}
}
/* Parse term in expression *
* Sets: term - the term (as a string) */
void prstrm()
{
DEBUG("Parsing term\n", 0);
prsval();
prsval(FALSE);
if (valtyp == FUNCTION) {
ERROR("Function call only allowed in first term\n", 0, EXIT_FAILURE);
}
strcpy(term, value);
DEBUG("Parsed term %s\n", term);
trmtxt = valtyp;
if (trmtxt == ARRAY) {
prsidx();
asmlin("LDX", value);
strcat(term, ",X");
}
chkidx(); //Check for Array Index
//chkpst = ispopr(); //Check for Post-Op
skpspc();
}
/* Compile Address Reference */
void prcadr(char* symbol)
void prcadr(int adract, char* symbol)
{
strcpy(word,"#<");
strcat(word,symbol);
asmlin("LDX", word);
DEBUG("Processing address '%s'\n", word);
strcpy(word,"#>");
strcat(word,symbol);
asmlin("LDY", word);
if (adract == 1) {
asmlin("LDA", word);
asmlin("PHA", "");
}
else
asmlin("LDY", word);
strcpy(word,"#<");
strcat(word,symbol);
if (adract == 1) {
asmlin("LDA", word);
asmlin("PHA", "");
}
else
asmlin("LDX", word);
}
/* Parse and Compile Address of Operator */
void prsadr()
void prsadr(int adract)
{
prsvar();
DEBUG("Parsing address of variable '%s'\n", value);
prcadr(value); //Compile Address Reference
DEBUG("Parsing address\n", 0);
if (isnpre())
prsnum(0xFFFF);
else
prsvar(FALSE);
prcadr(adract, value); //Compile Address Reference
}
/* Parse and Create Anonymous String */
void prsstr()
void prsstr(adract)
{
DEBUG("Parsing anonymous string\n", 0);
newlbl(vrname); //Generate Variable Name
value[0] = 0; //Use Variable Size 0
setvar(VTCHAR); //Set Variable Name, Type, and Size
prsdts(); //Parse Data String
setdat(); //Set Variable Data
varcnt++; //Increment Variable Counter
prcadr(vrname); //Compile Address Reference
newlbl(vrname); //Generate Variable Name
value[0] = 0; //Use Variable Size 0
setvar(VTCHAR); //Set Variable Name, Type, and Size
prsdts(); //Parse Data String
setdat(); //Set Variable Data
varcnt++; //Increment Variable Counter
prcadr(adract, vrname); //Compile Address Reference
}
/* Parse Additional Function Parameters */
void prsfnp()
/* Check for and Process Address or String */
int chkadr(adract)
{
if (look(',')) {
if (look('&'))
prsadr();
else if (match('"'))
prsstr();
else {
prstrm();
asmlin("LDY", term);
if (look(',')) {
prsval();
asmlin("LDX", value);
}
}
}
DEBUG("Checking for Address or String\n", 0);
int result = TRUE;
if (look('&'))
prsadr(adract);
else if (match('"'))
prsstr(adract);
else
result = FALSE;
skpspc();
return result;
}
/* Parse function call */
void prsfnc()
void prsfnc(char trmntr)
{
DEBUG("Processing Function Call '%s'...\n", term);
if (fnscnt >= MAXFNS)
@ -123,15 +151,25 @@ void prsfnc()
strcpy(fnstck[fnscnt++], term);
skpchr(); //skip open paren
CCMNT('(');
if (look('&'))
prsadr();
else if (match('"'))
prsstr();
else if (isvpre()) {
prsxpr(0);
prsfnp();
}
if (!chkadr(0) && isxpre() || match('*')) {
if (!look('*')) prsxpr(0);
if (look(',')) {
if (!chkadr(0)) {
if (!look('*')) {
prstrm();
asmlin("LDY", term);
}
if (look(',')) {
if (!look('*')) {
prsval(FALSE);
asmlin("LDX", value);
}
}
}
}
}
expect(')');
expect(trmntr);
asmlin("JSR", fnstck[--fnscnt]);
skpspc();
}
@ -140,20 +178,24 @@ void prsfnc()
* First term can include function calls */
void prsftm()
{
prsval();
prsval(TRUE);
DEBUG("Processing first term '%s'...\n", value);
strcpy(term, value);
trmtxt = valtyp;
if (trmtxt == FUNCTION) {
prsfnc(); //Parse Expression Function
if (valtyp == FUNCTION) {
prsfnc(0); //Parse Expression Function
return;
}
if (trmtxt == ARRAY) {
prsidx();
asmlin("LDX", value);
strcat(term, ",X");
if (wordis("A"))
return;
//if (ispopr()) oper = prspst(0, term); //Check for Post-Operator
if (wordis("X"))
asmlin("TXA", "");
else if (wordis("Y"))
asmlin("TYA", "");
else {
chkidx(); //Check for Array Index
asmlin("LDA", term);
}
asmlin("LDA", term);
}
/* Process Arithmetic or Bitwise Operator *
@ -185,6 +227,7 @@ void prcopr()
printf("Unrecognized operator '%c'\n", oper);
exterr(EXIT_FAILURE);
}
oper = 0;
}
/* Parse and compile expression */
@ -194,17 +237,17 @@ void prsxpr(char trmntr)
skpspc();
if (match('-')) {
DEBUG("Processing unary minus", 0);
asmlin("LDA", "#$00"); //Handle Unary Minus
asmlin("LDA", "#$00"); //Handle Unary Minus
}
else
prsftm(); //Parse First Term
skpspc();
while (isoper())
{
prsopr(); //Parse Operator
prstrm(); //Parse Term
prcopr(); //Process Operator
}
if (trmntr)
expect(trmntr);
expect(trmntr);
}

3
expr.h
View File

@ -3,11 +3,12 @@
**********************************/
char term[255]; /*Term parsed from equation*/
int trmtxt; /*Term Type*/
char fnstck[MAXFNS][VARLEN+1]; //Function Call Stack
int fnscnt; //Number of Functions in Stack
int chkpst; //Check for Post-Operator
void prsidx(); //Parse Array Index
void prstrm(); //Parse Term in Expression
void prsxpr(char trmntr); //Parse Expression

80
include.c
View File

@ -55,14 +55,68 @@ void incasm() {
clsinc();
}
/* Process define directive */
void pdefin()
{
getwrd(); //get defined identifier
DEBUG("Defining '%s'\n", word);
strncpy(defnam[defcnt], word, VARLEN);
setlbl(word); //Set label Assembler Line
expect('=');
defval[defcnt++] = prsbyt(); //Get Value
asmlin(EQUOP, value); //Write Definition
DEBUG("Defined as '%s'\n", value);
}
/* Parse Origin Subdirective */
void porign()
{
prsnum(0xFFFF); //Get Origin Address
asmlin(ORGOP, value); //Emit Origin Instruction
DEBUG("Set origin to %s\n", value);
}
/* Parse Origin Subdirective */
void prszpg()
{
zpaddr = prsnum(0xFF); //Set Zero Page Address to Constant
DEBUG("Set zero page address to %d\n", zpaddr);
}
/* Process Vartable Subdirective */
void pvrtbl()
{
if (vrwrtn) {
ERROR("Variable table already written", 0, EXIT_FAILURE);
}
vartbl(); //Write Variable Table
}
/* Parse Pragma Directive */
void pprgma()
{
getwrd(); //Get Pragma Subdirective
DEBUG("Parsing pragma directive '%s'\n", word);
if (wordis("ORIGIN"))
porign(); //Parse Origin
else if (wordis("VARTABLE"))
pvrtbl(); //Parse Vartable
else if (wordis("ZEROPAGE"))
prszpg(); //Parse Origin
else
ERROR("Illegal pragma subdirective '%s'\n", word, EXIT_FAILURE);
}
/* Process Include File Directive */
void pincdr()
{
skpchr(); //skip '#'
getwrd(); //read directive into word
DEBUG("Processing include file directive '%s'\n", word);
if (wordis("define"))
prsdef();
if (wordis("DEFINE"))
pdefin();
if (wordis("PRAGMA"))
pprgma();
else {
printf("Unrecognized directive '%s'\n", word);
exterr(EXIT_FAILURE);
@ -72,11 +126,7 @@ void pincdr()
/* Parse Header Word */
void phdwrd() {
getwrd();
if (wordis("void"))
pdecl(VTVOID);
else if (wordis("char"))
pdecl(VTCHAR);
else {
if (!ptype(MTNONE)) {
printf("Unexpected word '%s' in header\n", word);
exterr(EXIT_FAILURE);
}
@ -151,13 +201,15 @@ void pincfl()
printf("Invalid include file name '%sn", incnam);
exterr(EXIT_FAILURE);
}
if (strcmp(dot, ".a02") == 0)
incasm();
if (strcmp(dot, ".asm") == 0)
incasm();
else if (strcmp(dot, ".h") == 0)
include_hfil();
else if (strcmp(dot, ".h02") == 0) {
inchdr(); //Process Header File
strcpy(dot, ".asm");
strcpy(dot, ".a02");
incasm(); //Process Assembly File with Same Name
}
else {
@ -166,3 +218,15 @@ void pincfl()
}
}
/* Print Definition Table to Log File */
void logdef()
{
int i;
fprintf(logfil, "\n%-31s %5s\n", "Definition", "Value");
for (i=0; i<defcnt; i++)
{
fprintf(logfil, "%-31s %5d\n", defnam[i], defval[i]);
}
}

2
include.h
View File

@ -2,6 +2,6 @@
* C02 Include File Parsing Routines *
*************************************/
char line[255]; /*Entire line parsed from include file*/
char line[255]; /*Entire line parsed from include file*/

46
label.c
View File

@ -13,17 +13,21 @@
#include "parse.h"
#include "label.h"
/* Find Last Label of Specified Type *
* Args: lbtype: Label type *
* Sets: tmplbl - Label name *
* Returns: Index into label table *
* (-1 if not found) */
int lstlbl(int lbtype)
/* Find Last Label of Specified Types *
* Args: lbtyp1: First label type *
* lbtyp2: Second label type *
* Sets: tmplbl - Label name *
* Returns: Index into label table *
* (-1 if not found) */
int lstlbl(int lbtyp1, int lbtyp2)
{
int i;
DEBUG("Searching for label type %d\n", lbtype);
for (i = lblcnt - 1; i>-1; i--)
if (lbltyp[i] == lbtype) break;
DEBUG("Searching for label type %d ", lbtyp1);
DEBUG("and label type %d\n",lbtyp2);
for (i = lblcnt - 1; i>-1; i--) {
if (lbltyp[i] == lbtyp1) break;
if (lbltyp[i] == lbtyp2) break;
}
DEBUG("Search produced label index %d\n", i);
if (i>=0)
strcpy(tmplbl, lblnam[i]);
@ -42,8 +46,10 @@ void setblk(int blkflg)
void setlbl(char *lblset)
{
DEBUG("Setting Label '%s'\n", lblset);
if (strlen(lblasm) > 0)
if (strlen(lblasm) > 0) {
DEBUG("Emitting Label '%s'\n'", lblasm);
asmlin("",""); //Emit Block End Label on it's own line
}
if (strlen(lblset) > LABLEN)
ERROR("Label '%s' exceeds maximum size\n", word, EXIT_FAILURE);
strcpy(lblasm, lblset);
@ -53,6 +59,7 @@ void setlbl(char *lblset)
void prslbl()
{
DEBUG("Parsing Label '%s''\n", word);
CCMNT(nxtchr);
skpchr(); //skip ':'
setlbl(word);
}
@ -64,6 +71,22 @@ void newlbl(char* lbname)
DEBUG("Generated new label '%s'\n", lbname);
}
/* require label *
* if label is already set, returns that label *
* else generates new label and sets it */
void reqlbl(char* lbname)
{
if (lblasm[0])
strcpy(lbname, lblasm);
else {
newlbl(lbname);
setlbl(lbname);
}
}
/* Pop Label from Stack and Emit on Next Line */
int poplbl()
{
@ -76,6 +99,9 @@ int poplbl()
}
else if (lbtype == LTDO)
strcpy(loplbl, lblnam[lblcnt]);
else if (lbtype == LTDWHL)
strcpy(endlbl, lblnam[lblcnt]);
//strcpy(cndlbl, lblnam[lblcnt]);
else
setlbl(lblnam[lblcnt]);
inblck = lblblk[lblcnt-1];

3
label.h
View File

@ -18,9 +18,8 @@ int lblcnt; //Number of Labels in stack
int lblnxt; //Sequence of next label to be generated
char lbltmp[LABLEN+1]; //Label Temporary Storage
enum ltypes {LTIF, LTLOOP, LTEND, LTDO, LTCASE, LTFUNC}; //Label Types
enum ltypes {LTNONE, LTIF, LTLOOP, LTEND, LTDO, LTDWHL, LTFUNC}; //Label Types
int lstlbl(int lbtype); //Find Last Label of Specified Type
void prslbl(); //Parse Label From Code
void newlbl(char* lbname); //Generate New Block Label
int poplbl(); //Pull Last Label and Emit on Next Line

198
parse.c
View File

@ -12,8 +12,6 @@
#include "files.h"
#include "parse.h"
char opstr[2]; //Operator as a String
/* Various tests against nxtchr */
int match(char c) {return TF(nxtchr == c);}
int inbtwn(char mn, char mx) {return TF(nxtchr >= mn && nxtchr <= mx);}
@ -27,10 +25,13 @@ int isnl() {return TF(match('\n') || match('\r'));}
int isspc() {return isspace(nxtchr);}
int isnpre() {return TF(isdec() || match('$') || match('%'));}
int isapos() {return match('\'');}
int iscpre() {return TF(isnpre() || isapos());}
int isbpre() {return TF(isnpre() || isapos());}
int ishash() {return match('#');}
int iscpre() {return TF(isbpre() || ishash());}
int isvpre() {return TF(isalph() || iscpre());}
int isoper() {return TF(strchr("+-&|^", nxtchr));}
int ispopr() {return TF(strchr("+-<>", nxtchr));}
int isxpre() {return TF(isvpre() || match('-'));}
/* if Word is s then return TRUE else return FALSE*/
int wordis(char *s)
@ -61,6 +62,7 @@ char getnxt()
void skpspc()
{
//DEBUG("Skipping Spaces\n", 0);
if (isspc()) CCMNT(' ');
while (isspc())
getnxt();
}
@ -84,8 +86,8 @@ int look(char c)
/* if next printable character is c then skip, else generate error */
void expect(char c)
{
if (look(c))
return;
if (c == 0) return;
if (look(c)) return;
else {
printf("Expected Character '%c', but found '%c'\n", c, nxtchr);
exterr(EXIT_FAILURE);
@ -131,55 +133,11 @@ void getwrd()
if (!isalph()) expctd("Alphabetic Character");
while (isanum())
{
word[wrdlen++] = getnxt();
word[wrdlen++] = toupper(getnxt());
}
word[wrdlen] = 0;
}
/* Get Definition Text */
void getdef()
{
int wrdlen = 0;
skpspc();
while (isprnt()) {
word[wrdlen++] = getnxt();
}
word[wrdlen] = 0;
}
/* Process define directive */
void prsdef()
{
getwrd(); //get defined identifier
DEBUG("Defining '%s'\n", word);
strncpy(defnam[defcnt], word, VARLEN);
getdef();
DEBUG("Defined as '%s'\n", word);
strncat(deftxt[defcnt], word, DEFLEN);
defcnt++;
}
/* Check for and Expand DEFINE *
* Sets: nxtwrd, nxtchr, nxtupr *
* if match is found */
void expdef()
{
int i;
if (!isalph()) return;
DEBUG("Checking for definition '%s'\n", word);
nxtptr = 0;
for (i=0; i<defcnt; i++) {
if (strcmp(word, defnam[i]) == 0) {
strcpy(nxtwrd, deftxt[i]);
nxtchr = nxtwrd[0];
nxtupc = toupper(nxtchr);
DEBUG("Expanded to '%s'\n", word);
return;
}
}
strcpy(nxtwrd, word);
}
char escape(char c)
{
DEBUG("Escaping character '%c'\n", c);
@ -318,7 +276,7 @@ int prsnum(int maxval)
{
int number;
skpspc();
if (!iscpre()) expctd("constant value");
if (!isbpre()) expctd("constant value");
switch(nxtchr) {
case '%':
number = prsbin();
@ -345,22 +303,51 @@ int prsnum(int maxval)
return number;
}
/* Parse numeric constant *
* Args: maxval - maximum allowed value *
* Sets: value - the constant (as a string) *
* valtyp - value type (CONSTANT) */
void prscon(int maxval)
int prsbyt()
{
cnstnt = prsnum(maxval);
valtyp = CONSTANT;
if (maxval > 255)
sprintf(value, "#$%04X", cnstnt);
else
sprintf(value, "#$%02X", cnstnt);
DEBUG("Generated constant '%s'\n", value);
ACMNT(word);
return prsnum(0xFF);
}
void fnddef(char *name)
{
DEBUG("Looking up defined constant '%s'\n", word);
for (defidx=0; defidx<defcnt; defidx++) {
if (strcmp(defnam[defidx], name) == 0)
return;
}
defidx = -1;
}
int prsdef()
{
expect('#');
getwrd(); //Get Constant Name
fnddef(word);
if (defidx < 0) {
ERROR("Undefined constant '%s'\n", word, EXIT_FAILURE);
}
strcpy(value, word);
return defval[defidx];
}
/* Parse numeric constant *
* Args: maxval - maximum allowed value *
* Sets: cnstnt - the constant (as an integer) *
* value - the constant (as a string) *
* valtyp - value type (CONSTANT) */
void prscon()
{
skpspc();
if (ishash())
cnstnt = prsdef();
else
cnstnt = prsbyt();
valtyp = CONSTANT;
ACMNT(word);
strcpy(value, "#");
strcat(value, word);
DEBUG("Generated constant '%s'\n", value);
}
/* Get Value Type */
int gettyp()
@ -371,13 +358,14 @@ int gettyp()
}
/* Parse next word as variable or function name *
* Sets: value - Identifier Name *
* valtyp - Identifier Type */
void prsvar()
* Args: alwreg - Allow Register Names *
* Sets: value - Identifier Name *
* valtyp - Identifier Type */
void prsvar(int alwreg)
{
getwrd();
valtyp = gettyp();
if (valtyp != FUNCTION) chksym(word);
if (valtyp != FUNCTION) chksym(alwreg, word);
strcpy(value, word);
DEBUG("Parsed variable '%s'\n", value);
ACMNT(word);
@ -390,9 +378,77 @@ void prsopr()
expctd("Arithmetic or bitwise operator");
oper = getnxt();
DEBUG("Parsed operator '%c'\n", oper);
opstr[0] = oper;
opstr[1] = 0;
ACMNT(opstr);
CCMNT(oper);
skpspc();
}
void prcpst(char* name)
{
DEBUG("Processing post operation '%c'\n", oper);
switch(oper)
{
case '+':
if (strcmp(name, "X")==0)
asmlin("INX", "");
else if (strcmp(name, "Y")==0)
asmlin("INY", "");
else if (strcmp(name, "A")==0)
poperr(); //65C02 supports implicit INC, 6502 does not
else
asmlin("INC", name);
break;
case '-':
if (strcmp(name, "X")==0)
asmlin("DEX", "");
else if (strcmp(name, "Y")==0)
asmlin("DEY", "");
else if (strcmp(name, "A")==0)
poperr(); //65C02 supports implicit DEC, 6502 does not
else
asmlin("DEC", name);
break;
case '<':
if (strcmp(name, "X")==0)
poperr(); //Index Register Shift not Supported
else if (strcmp(name, "Y")==0)
poperr(); //Index Register Shift not Supported
else if (strcmp(name, "A")==0)
asmlin("ASL", "");
else
asmlin("ASL", name);
break;
case '>':
if (strcmp(name, "X")==0)
poperr(); //Index Register Shift not Supported
else if (strcmp(name, "Y")==0)
poperr(); //Index Register Shift not Supported
else if (strcmp(name, "A")==0)
asmlin("LSR", "");
else
asmlin("LSR", name);
break;
default:
printf("Unrecognized post operator '%c'\n", oper);
exterr(EXIT_FAILURE);
}
}
/* Parse Post Operator */
int prspst(char trmntr, char* name) {
oper = getnxt();
CCMNT(oper);
DEBUG("Checking for post operation '%c'\n", oper);
if (nxtchr == oper) {
skpchr();
CCMNT(oper);
expect(trmntr);
prcpst(name); //Process Post-Op
oper = 0;
}
else {
DEBUG("Not a post operation\n", 0);
}
return oper;
}

17
parse.h
View File

@ -4,20 +4,22 @@
#define TF(x) (x) ? TRUE : FALSE;
enum trmtxts {CONSTANT, VARIABLE, ARRAY, FUNCTION};
enum etypes {ETDEF, ETMAC}; //Definition Types
enum stypes {CONSTANT, VARIABLE, ARRAY, FUNCTION}; //Symbol Types
enum etypes {ETDEF, ETMAC}; //Definition Types
char word[LINELEN]; //Word parsed from source file
char uword[LINELEN]; //Word converted too uppercase
char nxtwrd[LINELEN]; //Next Word (from DEFINE lookup)
int nxtptr; //Pointer to next character in nxtwrd
char value[LINELEN]; //Term parsed from equation
int valtyp; //Value Type
char oper; //Arithmetic or Bitwise Operator
int cnstnt; //Value of Parsed Constant
int cnstnt; //Value of Parsed Constant
char defnam[MAXDEF+1][VARLEN+1]; //Definition Name Table
char deftxt[MAXDEF+1][DEFLEN+1]; //Definition Text Table
int defval[MAXDEF+1]; //Definition Value Table
int defcnt; //Number of Definitions Defined
int defidx; //Index into Definition Tables
int match(char c); //Does Next Character match c
int inbtwn(char mn, char mx); //Is Next Character in Range ()mn - mx)
@ -48,10 +50,9 @@ void skpcmt(); //Skip to End of Comment
void getwrd(); //Get Next Word
void expdef(); //Check for and Expand Definition
int prsdec(); //Get Decimal Number
void prscon(int maxval); //Parse a Constant
void prscon(); //Parse a Constant
void prsopr(); //Parse Arithmetic Operator
void prsvar(); //Parse Variable
void prsvar(int alwreg); //Parse Variable

336
stmnt.c
View File

@ -15,80 +15,97 @@
#include "expr.h"
#include "stmnt.h"
/* Parse Shortcut If */
void prssif(char trmntr) {
newlbl(cndlbl); //Create Label for "if FALSE" expression
prscnd(')', FALSE); //Parse Condition
expect('?');
prsxpr(':'); //Parse "if TRUE" expression
newlbl(tmplbl); //Create End of Expression Label
asmlin("JMP", tmplbl); //Jump over "if FALSE" expression
setlbl(cndlbl); //Emit "if FALSE" label
prsxpr(trmntr); //Parse "if FALSE" expression
setlbl(tmplbl); //Emit End of Expression Label
}
/* Process Assignment */
void prcasn(char trmntr)
{
DEBUG("Processing assignment of variable '%s'\n", asnvar);
expect('=');
if (look('(')) { //Parse Shortcut If
newlbl(cndlbl); //Create Label for "if FALSE" expression
prscnd(')', FALSE); //Parse Condition
expect('?');
prsxpr(':'); //Parse "if TRUE" expression
newlbl(tmplbl); //Create End of Expression Label
asmlin("JMP", tmplbl); //Jump over "if FALSE" expression
setlbl(cndlbl); //Emit "if FALSE" label
prsxpr(trmntr); //Parse "if FALSE" expression
setlbl(tmplbl); //Emit End of Expression Label
}
else
prsxpr(trmntr);
if (strlen(asnidx)) {
asmlin("LDX", asnidx);
strcat(asnvar,",X");
}
asmlin("STA", asnvar);
}
void prcpop() {
DEBUG("Processing post operation '%c'\n", oper);
switch(oper)
{
case '+':
asmlin("INC", asnvar);
break;
case '-':
asmlin("DEC", asnvar);
break;
case '<':
asmlin("ASL", asnvar);
break;
case '>':
asmlin("LSR", asnvar);
break;
default:
printf("Unrecognized post operator '%c'\n", oper);
exterr(EXIT_FAILURE);
}
}
/* Parse Post Operator */
void prspop(char trmntr) {
oper = getnxt();
CCMNT(oper); CCMNT(oper);
DEBUG("Checking for post operation '%c'\n", oper);
if (nxtchr == oper) {
skpchr();
prcpop(); //Process Post-Op
if (strlen(asnvar) == 1 && strchr("XY", asnvar[0])) {
DEBUG("Processing assignment of register '%s'\n", asnvar);
prsval(TRUE); //Get value to assign
expect(trmntr);
if (strlen(value) == 1 && strchr("XY", value[0])) {
ERROR("Illegal Reference to Register %s\n", value, EXIT_FAILURE);
}
if (asnvar[0] == 'X') {
if (strcmp(value, "A") == 0)
asmlin("TAX", "");
else
asmlin("LDX", value);
}
else {
if (strcmp(value, "A") == 0)
asmlin("TAY", "");
else
asmlin("LDY", value);
}
return;
}
DEBUG("Processing assignment of variable '%s'\n", asnvar);
if (look('('))
prssif(trmntr); //Parse Shortcut If
else
expctd("post operator");
prsxpr(trmntr); //Parse Expression
/* if (strcmp(asnvar, "X")==0)
asmlin("TAX", "");
else if (strcmp(asnvar, "Y")==0)
asmlin("TAY", "");
else */
if ((strcmp(asnvar, "A")!=0))
{
if (strlen(asnidx)) {
if (asnivt == CONSTANT) {
strcat(asnvar, "+");
strcat(asnvar, asnidx);
}
else {
asmlin("LDX", asnidx);
strcat(asnvar,",X");
}
}
asmlin("STA", asnvar);
}
}
void poperr()
{
printf("Illegal post-operation %c%c on register %s\n", oper, oper, asnvar);
exterr(EXIT_FAILURE);
}
/* Process Variable at Beginning of Statement */
void prcvar(char trmntr)
{
chksym(word);
chksym(TRUE, word);
strcpy(asnvar, word); //sav variable to assign to
if (valtyp == VARIABLE && look(';')) {
asmlin("STA", asnvar);
return;
}
if (valtyp == ARRAY) {
prsidx(); //Parse Array Index
asnivt = valtyp;
strncpy(asnidx, value, VARLEN);
}
else
asnidx[0] = 0;
if (ispopr(nxtchr))
prspop(trmntr); //Parse Post Operator
if (ispopr()) {
if (prspst(trmntr, asnvar)) //Parse Post Operator
expctd("post operator");
}
else
prcasn(trmntr);
}
@ -107,6 +124,31 @@ void bgnblk(int blkflg)
setblk(inblck);
}
/* Parse 'asm' String Parameter */
void pasmst(char trmntr)
{
skpspc(); //Skip Spaces
if (!match('"'))
expctd("string");
getstr();
skpspc();
expect(trmntr);
}
/* Parse and Compile 'asm' statement */
void pasm()
{
char opcode[LINELEN];
expect('(');
pasmst(',');
if (strlen(word)) setlbl(word);
pasmst(',');
strcpy(opcode, word);
pasmst(')');
expect(';');
asmlin(opcode, word);
}
/* Parse and Compile and Assignment */
void prsasn(char trmntr)
{
@ -116,9 +158,10 @@ void prsasn(char trmntr)
}
/* parse and compile 'break'/'continue' statement */
void pbrcnt(int lbtype) {
void pbrcnt(int lbtyp1, int lbtyp2)
{
DEBUG("Parsing BREAK/CONTINUE statement\n", 0);
if (lstlbl(lbtype) < 0)
if (lstlbl(lbtyp1, lbtyp2) < 0)
ERROR("Break/continue statement outside of loop\n", 0, EXIT_FAILURE);
DEBUG("Found Label '%s'\n", tmplbl);
asmlin("JMP", tmplbl);
@ -126,11 +169,15 @@ void pbrcnt(int lbtype) {
}
/* parse and compile 'do' statement */
void pdo() {
void pdo()
{
DEBUG("Parsing DO statement '%c'\n", nxtchr);
newlbl(loplbl); //Create Do Loop Label
newlbl(endlbl); //Create End Label
pshlbl(LTDWHL, endlbl); //and Push onto Stack
reqlbl(loplbl); //Get or Create/Set Loop Label
//newlbl(loplbl); //Create Do Loop Label
//setlbl(loplbl); //Set Label to Emit on Next Line
pshlbl(LTDO, loplbl); //Push onto Stack
setlbl(loplbl); //Set Label to Emit on Next Line
bgnblk(FALSE); //Check For and Begin Block
}
@ -139,14 +186,17 @@ void pdowhl() {
DEBUG("Parsing WHILE after DO '%c'\n", nxtchr);
getwrd(); //Check for While
ACMNT(word);
if (!wordis("while"))
if (!wordis("WHILE"))
expctd("while statement");
expect('(');
newlbl(cndlbl); //Create Skip Label
prscnd(')', FALSE); //Parse Conditional Expession
asmlin("JMP", loplbl); //Emit Jump to Beginning of Loop
setlbl(cndlbl); //and Set Label to Emit on Next Line
expect(';'); //Check for End of Statement
//poplbl(); //Pop While Conditional Label
strcpy(cndlbl, loplbl); //Set Conditional Label to Loop Label
prscnd(')', TRUE); //Parse Conditional Expession
//asmlin("JMP", loplbl); //Emit Jump to Beginning of Loop
//setlbl(cndlbl); //and Set Label to Emit on Next Line
poplbl(); //Pop While Conditional Label
setlbl(endlbl); //and Set Label to Emit on Next Line
expect(';'); //Check for End of Statement
}
@ -198,8 +248,72 @@ void pgoto() {
DEBUG("Parsing GOTO statement\n", 0);
getwrd();
ACMNT(word);
asmlin("JMP", word);
expect(';');
asmlin("JMP", word);
}
/* parse and compile inline statement */
void pinlne()
{
DEBUG("Parsing INLINE statement\n", 0);
do {
DEBUG("Parsing inline parameter\n", 0);
if (look('&')) {
reqvar(FALSE); //Get Variable Name
strcpy(word, "<");
strcat(word, value);
strcat(word, ", >");
strcat(word, value);
asmlin(BYTEOP, word);
}
else if (look('"')) {
value[0] = 0;
while (!match('"')) {
CCMNT(nxtchr);
sprintf(word, "$%hhX,", getnxt());
strcat(value, word);
}
strcat(value,"0");
CCMNT(nxtchr);
skpchr(); //Skip Terminating Quote
asmlin(BYTEOP, value);
}
else {
prscon(0xFF);
sprintf(word, "$%hhX", cnstnt); //not needed?
asmlin(BYTEOP, value);
}
} while (look(','));
expect(';');
}
/* parse and compile pop statement */
void ppop()
{
DEBUG("Parsing POP statement\n", 0);
do {
asmlin("PLA", ""); //Pop Value off Stack
if (!look('*')) {
reqvar(TRUE);
strcpy(term, value);
chkidx();
asmlin("STA", term);
}
} while (look(','));
expect(';');
}
/* parse and compile push statement */
void ppush()
{
DEBUG("Parsing PUSH statement\n", 0);
do {
if (!chkadr(1)) {
prsxpr(0); //Parse Expression
asmlin("PHA",""); //Push Result on Stack
}
} while (look(','));
expect(';');
}
/* parse and compile return statement */
@ -211,50 +325,22 @@ void pretrn() {
lsrtrn = TRUE; //Set RETURN flag
}
/* parse and compile switch statement */
void pswtch() {
DEBUG("Parsing SWITCH statement\n", 0);
expect('(');
prsxpr(')');
newlbl(endlbl);
pshlbl(LTEND, endlbl);
bgnblk(TRUE);
strcpy(xstmnt,"case");
}
/* parse and compile case statement */
void pcase() {
DEBUG("Parsing CASE statement\n", 0);
prscon(0xff); //Parse Constant
asmlin("CMP", value);
newlbl(skplbl);
pshlbl(LTCASE, skplbl);
asmlin("BNE", skplbl);
expect(':');
}
void pdeflt() {
DEBUG("Parsing DEFAULT statement\n", 0);
expect(':');
if (poplbl() != LTCASE)
ERROR("Encountered default without case\n", 0, EXIT_FAILURE);
}
/* parse and compile while statement */
void pwhile() {
DEBUG("Parsing WHILE statement '%c'\n", nxtchr);
expect('(');
newlbl(endlbl); //Create End Label
pshlbl(LTEND, endlbl); //and Push onto Stack
newlbl(loplbl); //create Loop Label
setlbl(loplbl); //Set to Emit on Next Line
reqlbl(loplbl); //Get or Create/Set Loop Label
//newlbl(loplbl); //create Loop Label
//setlbl(loplbl); //Set to Emit on Next Line
pshlbl(LTLOOP, loplbl); //Push onto Stack
newlbl(cndlbl); //Create Conditional Skip Label
prscnd(')', TRUE); //Parse Conditional Expession
asmlin("JMP", endlbl); //Emit Jump to End of Loop
setlbl(cndlbl); //and Set Label to Emit on Next Line
if (!look(')')) {
newlbl(cndlbl); //Create Conditional Skip Label
prscnd(')', TRUE); //Parse Conditional Expession
asmlin("JMP", endlbl); //Emit Jump to End of Loop
setlbl(cndlbl); //and Set Label to Emit on Next Line
}
bgnblk(FALSE); //Check For and Begin Block
}
@ -263,13 +349,11 @@ void punimp() {
ERROR("Unimplemented statement '%s' encountered\n", word, EXIT_FAILURE);
}
/* Parse Function Call as Statement */
void prsfns()
{
strcpy(term, word); //Copy Function Name
prsfnc(); //Parse Function Call
expect(';');
prsfnc(';'); //Parse Function Call
return;
}
@ -295,8 +379,6 @@ void endblk(int blkflg)
if (inblck != blkflg)
ERROR("Encountered '}' without matching '{'\n", 0, EXIT_FAILURE);
lbtype = poplbl();
if (lbtype == LTCASE)
ERROR("Ended switch without default\n", 0, EXIT_FAILURE);
if (lbtype == LTDO)
pdowhl(); //Parse While at End of Do Loop
}
@ -305,35 +387,35 @@ void endblk(int blkflg)
void pstmnt()
{
DEBUG("Parsing statement '%s'\n", word);
if (wordis("do")) {
if (wordis("DO")) {
pdo();
return;
}
if (wordis("else")) {
if (wordis("ELSE")) {
pelse();
return;
}
if (wordis("for")) {
if (wordis("FOR")) {
pfor();
return;
}
if (wordis("if")) {
if (wordis("IF")) {
pif();
return;
}
if (wordis("switch")) {
if (wordis("SWITCH")) {
punimp();
return;
}
if (wordis("case")) {
if (wordis("CASE")) {
punimp();
return;
}
if (wordis("default")) {
if (wordis("DEFAULT")) {
punimp();
return;
}
if (wordis("while")) {
if (wordis("WHILE")) {
pwhile();
return;
}
@ -341,13 +423,21 @@ void pstmnt()
prslbl(); //Parse Label
return;
}
if (wordis("break"))
pbrcnt(LTEND);
else if (wordis("continue"))
pbrcnt(LTLOOP);
else if (wordis("goto"))
if (wordis("ASM"))
pasm();
else if (wordis("BREAK"))
pbrcnt(LTEND, LTDWHL);
else if (wordis("CONTINUE"))
pbrcnt(LTLOOP, LTDO);
else if (wordis("GOTO"))
pgoto();
else if (wordis("return"))
else if (wordis("INLINE"))
pinlne();
else if (wordis("POP"))
ppop();
else if (wordis("PUSH"))
ppush();
else if (wordis("RETURN"))
pretrn();
else
prssym();

1
stmnt.h
View File

@ -4,6 +4,7 @@
char asnvar[VARLEN+1]; //Assigned Variable Name
char asnidx[VARLEN+1] ; //Assigned Variable Index
int asnivt; //Assigned Index Variable Type
char xstmnt[LINELEN]; //Required Statement

125
vars.c
View File

@ -18,7 +18,7 @@
/* Lookup variable name in variable table *
* Returns index into varnam array *
* FALSE if variable was not found */
int lookup(char *name)
int fndvar(char *name)
{
int i;
DEBUG("Looking up variable '%s'\n", word);
@ -32,28 +32,36 @@ int lookup(char *name)
/* Check if variable has been defined */
int symdef(char *name)
{
if (lookup(name) < 0)
return FALSE;
else
if (fndvar(name) > -1)
return TRUE;
else
return FALSE;
}
/* Check for variable *
* Generates error if variable is undefined */
void chksym(char *name)
* Generates error if variable is undefined *
* Args: alwreg - allow register name *
* name - variable name */
void chksym(int alwreg, char *name)
{
if (strlen(name) == 1 && strchr("AXY", name[0])) {
if (alwreg) return;
else ERROR("Illegal reference to register %s\n", name, EXIT_FAILURE);
}
if (!symdef(name))
ERROR("Undeclared variable '%s' encountered\n", word, EXIT_FAILURE);
ERROR("Undeclared variable '%s' encountered\n", name, EXIT_FAILURE);
}
/* Parse Variable Name *
* Generates error if not a simple variable */
void reqvar()
/* Parse Variable Name *
* Parameters: alwary - Allow Array Reference *
* Sets: vrname - operand for LDA/STA/LDY/STY */
void reqvar(int alwary)
{
prsvar();
if (valtyp != VARIABLE)
expctd("Variable");
prsvar(FALSE);
if (!alwary)
if (valtyp != VARIABLE)
expctd("Variable");
}
/* Check for Array specifier and get size *
@ -67,7 +75,7 @@ void pvarsz()
skpchr();
if (alcvar) {
DEBUG("Parsing array size\n", 0);
prsnum(0xFF);
sprintf(value, "%d", prsnum(0xFF) + 1);
}
expect(']');
}
@ -79,7 +87,22 @@ void pvarsz()
void prsdtc()
{
dtype = DTBYTE;
prscon(0xff);
prscon();
}
/* Parse Data Array */
void prsdta()
{
dtype = DTARRY;
expect('{');
dlen = 0;
while (TRUE) {
prscon();
dattmp[dlen++] = cnstnt;
if (!look(','))
break;
}
expect('}');
}
/* Parse Data String */
@ -103,6 +126,11 @@ void setdat()
dlen = 1;
datvar[dsize++] = cnstnt;
}
else if (dtype == DTARRY) {
DEBUG("Setting variable data to array of length %d\n", dlen);
for (i=0; i<dlen; i++)
datvar[dsize++] = dattmp[i];
}
else {
DEBUG("Setting variable data to '%s'\n", value);
dlen = strlen(value);
@ -122,10 +150,12 @@ void prsdat()
return;
}
skpspc();
if (isnpre())
prsdtc(0xff); //Parse Data Constant
if (iscpre())
prsdtc(); //Parse Data Constant
else if (match('"'))
prsdts(); //Parse Data String
else if (match('{'))
prsdta(); //Parse Data Array
else
expctd("numeric or string constant");
setdat(); //Store Data Value
@ -145,35 +175,45 @@ void setvar(int t)
/* Parse and Compile Variable Declaration *
* Uses: word - variable name */
void addvar(int t)
void addvar(int m, int t)
{
strcpy(vrname, word); //Save Variable Name
if (symdef(vrname))
ERROR("Duplicate declaration of variable '%s\n", word,EXIT_FAILURE);
if (t == VTVOID)
ERROR("Illegal Variable Type\n", 0, EXIT_FAILURE);
pvarsz(); //Check for Array Declaration and Get Size
if (m == MTZP) {
setlbl(vrname);
sprintf(word, "$%hhX", zpaddr++);
asmlin(EQUOP, word);
strcpy(value, "*"); //Set Variable Type to Zero Page
}
else
pvarsz(); //Check for Array Declaration and Get Size
setvar(t); //Add to Variable Table
prsdat(); //Parse Variable Data
if (m != MTZP)
prsdat(); //Parse Variable Data
varcnt++; //Increment Variable Counter
}
/* Add Function Definition */
void addfnc()
{
ACMNT(word);
expect('(');
strcpy(fncnam, word); //Save Function Name
prmcnt = 0; //Set Number of Parameters
skpspc(); //Skip Spaces
if (isalph()) { //Parse Parameters
reqvar(); //Get First Parameter
reqvar(FALSE); //Get First Parameter
strcpy(prmtra, value);
prmcnt++;
if (look(',')) {
reqvar(); //Get Second Parameter
reqvar(FALSE); //Get Second Parameter
strcpy(prmtry, value);
prmcnt++;
if (look(',')) {
reqvar(); //Third Parameter
reqvar(FALSE); //Third Parameter
strcpy(prmtrx, value);
prmcnt++;
}
@ -195,22 +235,52 @@ void addfnc()
}
/* (Check For and) Parse Variable Declaration*/
void pdecl(int t)
void pdecl(int m, int t)
{
DEBUG("Processing variable declarations(s) of type %d\n", t);
while(TRUE) {
getwrd();
if (look('(')) {
if (match('(')) {
if (m != MTNONE) {
ERROR("Illegal Modifier %d in Function Definion", m, EXIT_FAILURE);
}
addfnc(); //Add Function Call
return;
}
addvar(t);
addvar(m, t);
if (!look(','))
break;
}
expect(';');
}
/* Check for and Parse Type Keyword */
int ptype(int m)
{
int result = TRUE;
if (wordis("VOID"))
pdecl(m, VTVOID); //Parse 'void' declaration
else if (wordis("CHAR"))
pdecl(m, VTCHAR); //Parse 'char' declaration
else
result = FALSE;
return result;
}
/* Check for and Parse Modifier */
int pmodfr()
{
DEBUG("Parsing modifier '%s'\n", word);
int result = TRUE;
if (wordis("ZEROPAGE")) {
getwrd();
ptype(MTZP);
}
else
result = FALSE;
return result;
}
/* Write Variable Data */
void vardat(int i)
{
@ -238,7 +308,7 @@ void vartbl()
DEBUG("Set Label to '%s'\n", lblasm);
if (strcmp(varsiz[i], "*") == 0)
continue;
else if (datlen[i])
if (datlen[i])
vardat(i); //Write Variable Data
else if (strlen(varsiz[i]) > 0) {
DEBUG("Allocating array '%s'\n", varnam[i]);
@ -249,6 +319,7 @@ void vartbl()
asmlin(BYTEOP, "0");
}
}
vrwrtn = TRUE;
}
/* Print Variable Table to Log File */

11
vars.h
View File

@ -8,6 +8,7 @@ char vartyp[MAXVAR+1]; //Variable Type
char varsiz[MAXVAR+1][4]; //Variable Array
int varcnt; //Number of Variables in Table
char vrname[MAXVAR+1]; //Variable Name
int vrwrtn; //Variables Written Flag
/*
int varidx; //Index into Variable Table
@ -18,13 +19,17 @@ enum vtypes {VTVOID, VTCHAR}; //Variable Types
char datvar[DATASPC+1]; //Variable Data Storage
char datlen[MAXVAR+1]; //Variable Data Length
char dattyp[MAXVAR+1]; //Variable Data Type
char dattmp[256]; //Variable Temporary Data
int dtype; //Data Type
int dlen; //Length of Variable Data
int dsize; //Total Data Length
enum dtypes {DTBYTE, DTSTR}; //Variable Data Types
enum dtypes {DTBYTE, DTSTR, DTARRY}; //Variable Data Types
enum mtypes {MTNONE, MTZP}; //Variable Modifier Types
int symdef(char *name); //Is Variable defined (TRUE or FALSE)
int zpaddr; //Current Zero-Page Address
char fncnam[VARLEN+1]; //Function Name
char prmtra[VARLEN+1]; //Function Parameter A
@ -32,11 +37,11 @@ char prmtrx[VARLEN+1]; //Function Parameter X
char prmtry[VARLEN+1]; //Function Parameter Y
int prmcnt; //Number of Parameters
void chksym(char *name); //Error if Variable not defined
void chksym(int alwreg, char *name); //Error if Variable not defined
void prsdts(); //Parse Data String
void setdat(); //Set Variable Data
void setvar(int t); //Set Variable Name and Size
void pdecl(int t); //Parse Variable Declaration
void pdecl(int m, int t); //Parse Variable Declaration
void vartbl(); //Create Variable Table