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Added declaration modifier const

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This commit is contained in:
Curtis F Kaylor 2018-08-03 16:38:20 -04:00
parent de4124e3b3
commit fe62927246
8 changed files with 83 additions and 48 deletions
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1
src/common.h
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@ -82,3 +82,4 @@ void setcmt(char *s); //Set comment to string
#define SCMNT(str) if (gencmt) {setcmt(str);}
#define ACMNT(str) if (gencmt) {addcmt(str);}
#define CCMNT(chr) if (gencmt) {chrcmt(chr);}
#define LCMNT(str) if (gencmt) {setcmt(str); cmtlin();}

25
src/dclrtn.c
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@ -115,22 +115,29 @@ void pdecl(int m, int t) {
* Args: m - Modifier Type */
int ptype(int m) {
int result = TRUE;
if (wordis("STRUCT")) pstrct(m); //Parse 'const' declaration
else if (wordis("CONST")) pconst(m); //Parse 'const' declaration
else if (wordis("ENUM")) penum(m); //Parse 'enum' declaration
else if (wordis("CHAR")) pdecl(m, VTCHAR); //Parse 'char' declaration
else if (wordis("VOID")) pdecl(m, VTVOID); //Parse 'void' declaration
else result = FALSE;
if (wordis("STRUCT")) pstrct(m); //Parse 'const' declaration
else if (wordis("ENUM")) penum(m); //Parse 'enum' declaration
else if (wordis("CHAR")) pdecl(m, VTCHAR); //Parse 'char' declaration
else if (wordis("VOID")) pdecl(m, VTVOID); //Parse 'void' declaration
else result = FALSE;
return result;
}
int pmtype(int m) {
getwrd();
if (m == MTALGN && wordis("CONST")) {m = m | MTCONST; getwrd();}
DEBUG("Parsing type %s\n", word)
return ptype(m);
}
/* Check for and Parse Modifier */
int pmodfr(void) {
DEBUG("Parsing modifier '%s'\n", word)
int result = TRUE;
if (wordis("ALIGNED")) { getwrd(); ptype(MTALGN); }
else if (wordis("ZEROPAGE")) { getwrd(); ptype(MTZP); }
else if (wordis("ALIAS")) { getwrd(); ptype(MTALS); }
if (wordis("ALIAS")) { pmtype(MTALS); }
else if (wordis("ALIGNED")) { pmtype(MTALGN); }
else if (wordis("CONST")) { pmtype(MTCONST); }
else if (wordis("ZEROPAGE")) { pmtype(MTZP); }
else result = FALSE;
return result;
}

14
src/expr.c
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@ -33,11 +33,11 @@ void poptrm(void) {
* Args: alwreg - allow registers *
* Sets: value - the value (as a string) *
* valtyp - value type */
void prsval(int alwreg) {
void prsval(int alwreg, int alwcon) {
DEBUG("Parsing value\n", 0)
skpspc();
if (islpre()) prslit(); //Parse Literal
else if (isalph()) prsvar(alwreg); //Parse Variable
else if (isalph()) prsvar(alwreg, alwcon); //Parse Variable
else expctd("literal or variable");
DEBUG("Parsed value of type %d\n", valtyp)
skpspc();
@ -55,7 +55,7 @@ void prcmns(void) {
* "" if no index defined */
void prsidx(int clbrkt) {
expect('[');
prsval(TRUE); //Parse Value, Allowing Registers
prsval(TRUE, TRUE); //Parse Value, Allowing Registers
DEBUG("Parsed array index '%s'\n", value)
if (clbrkt) expect(']');
}
@ -113,7 +113,7 @@ void chkidx(void) {
* Sets: term - the term (as a string) */
void prstrm(void) {
DEBUG("Parsing term\n", 0)
prsval(FALSE); //Parse Term - Disallow Registers
prsval(FALSE, TRUE); //Parse Term - Disallow Registers
if (valtyp == FUNCTION) ERROR("Function call only allowed in first term\n", 0, EXIT_FAILURE)
strcpy(term, value);
DEBUG("Parsed term %s\n", term)
@ -140,7 +140,7 @@ void prcadr(int adract, char* symbol) {
void prsadr(int adract) {
DEBUG("Parsing address\n", 0)
if (isnpre()) prsnum(0xFFFF);
else prsvar(FALSE);
else prsvar(FALSE, TRUE);
prcadr(adract, value); //Compile Address Reference
}
@ -177,7 +177,7 @@ void prsfnc(char trmntr) {
if (!look('*')) prsxpr(0);
if (look(',') && !chkadr(0)) {
if (!look('*')) { prstrm(); asmlin("LDY", term); }
if (look(',')) { prsval(FALSE); asmlin("LDX", value); }
if (look(',')) { prsval(FALSE, TRUE); asmlin("LDX", value); }
}
}
expect(')');
@ -201,7 +201,7 @@ void prcftm(void) {
/* Parse first term of expession *
* First term can include function calls */
void prsftm(void) {
prsval(TRUE); //Parse Value, Allowing Registers
prsval(TRUE, TRUE); //Parse Value, Allowing Registers
prcftm();
}

2
src/parse.c
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@ -25,7 +25,7 @@ int isdec(void) {return inbtwn('0', '9');}
int iscpre(void) {return match('#');}
int ishexd(void) {return TF(isdec() || inbtwn('A', 'Z'));}
int islpre(void) {return TF(isbpre() || iscpre() || isszop() || isxfop());}
int isnl(void) {return TF(match('\n') || match('\r'));}
int isnl(void) {return TF(match('\n') || match('\r') || match(EOF));}
int isnpre(void) {return TF(isdec() || match('$') || match('%'));}
int isoper(void) {return TF(strchr("+-&|^", nxtchr));}
int ispopr(void) {return TF(strchr("+-<>", nxtchr));}

6
src/stmnt.c
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@ -113,7 +113,7 @@ int getidx(char* idx) {
/* Process Assignment Variable(s) */
void prcvar(char trmntr) {
chksym(TRUE, word);
chksym(TRUE, FALSE, word);
strcpy(asnvar, word); //save variable to assign to
if (valtyp == VARIABLE && match('.')) prsmbr(asnvar);
asntyp = valtyp; //Set Assigned Varable Type
@ -131,14 +131,14 @@ void prcvar(char trmntr) {
}
if (look(',')) {
if (asntyp == REGISTER) ERROR("Register %s not allowed in plural assignment\n", asnvar, EXIT_FAILURE)
prsvar(FALSE); //get variable name
prsvar(FALSE, FALSE); //get variable name
strcpy(ysnvar, word);
DEBUG("Set STY variable to %s\n", ysnvar)
if (valtyp == ARRAY) ysnivt = getidx(ysnidx); //Get Array Index and Type
else ysnidx[0] = 0;
DEBUG("Set STY index to '%s'", ysnidx) DETAIL(" and type to %d\n", ysnivt)
if (look(',')) {
prsvar(FALSE); //get variable name
prsvar(FALSE, FALSE); //get variable name
strcpy(xsnvar, word);
DEBUG("Set STX variable to %s\n", xsnvar)
//if (valtyp == ARRAY) ERROR("Array element not allowed in third assignment\n", 0, EXIT_FAILURE)

48
src/vars.c
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@ -53,8 +53,9 @@ int fndmbr(int idx, char *name) {
/* Check for variable *
* Generates error if variable is undefined *
* Args: alwreg - allow register name *
* alwcon - allow const variable *
* name - variable name */
void chksym(int alwreg, char *name) {
void chksym(int alwreg, int alwcon, char *name) {
if (strlen(name) == 1 && strchr("AXY", name[0])) {
if (alwreg && valtyp != ARRAY) {
valtyp = REGISTER;
@ -64,6 +65,8 @@ void chksym(int alwreg, char *name) {
}
if (!fndvar(name))
ERROR("Undeclared variable '%s' encountered\n", name, EXIT_FAILURE)
if (!alwcon && (varmod[varidx] & MTCONST))
ERROR("Illegal use of const variable '%s'\n", name, EXIT_FAILURE)
}
/* Parse next word as struct member *
@ -87,10 +90,10 @@ void prsmbr(char* name) {
* Args: alwreg - Allow Register Names *
* Sets: value - Identifier Name *
* valtyp - Identifier Type */
void prsvar(int alwreg) {
void prsvar(int alwreg, int alwcon) {
getwrd(); //Get Variable Name
valtyp = gettyp(); //Determine Variable Type
if (valtyp != FUNCTION) chksym(alwreg, word);
if (valtyp != FUNCTION) chksym(alwreg, alwcon, word);
strcpy(value, word);
DEBUG("Parsed variable '%s'\n", value)
if (valtyp == VARIABLE && match('.')) prsmbr(value);
@ -100,7 +103,7 @@ void prsvar(int alwreg) {
* Parameters: alwary - Allow Array Reference *
* Sets: vrname - operand for LDA/STA/LDY/STY */
void reqvar(int alwary) {
prsvar(FALSE);
prsvar(FALSE, TRUE);
if (!alwary && valtyp != VARIABLE) expctd("Variable");
}
@ -191,9 +194,9 @@ void setdat(void) {
}
/* Parse and store variable data */
void prsdat(void) {
DEBUG("Checking for variable data\n", 0)
if (!look('=')) { datlen[varcnt] = 0; return; }
void prsdat(int m) {
if ((m & MTCONST) == 0) ERROR("Initialization allowed only on variables declared CONST\n", 0, EXIT_FAILURE);
DEBUG("Parsing variable data\n", 0)
skpspc();
if (islpre()) {dtype = DTBYTE; prslit(); } //Parse Data Literal
else if (match('"')) prsdts(); //Parse Data String
@ -216,23 +219,23 @@ void setvar(int m, int t) {
}
/* Parse and Compile Variable Declaration *
* Uses: word - variable name */
* Uses: word - variable name */
void addvar(int m, int t) {
strcpy(vrname, word); //Save Variable Name
if (fndvar(vrname)) ERROR("Duplicate declaration of variable '%s\n", vrname, EXIT_FAILURE)
if (t == VTVOID) ERROR("Illegal Variable Type\n", 0, EXIT_FAILURE)
if (m == MTZP) {
if (m & MTZP) {
setlbl(vrname);
sprintf(word, "$%hhX", zpaddr++);
asmlin(EQUOP, word);
strcpy(value, "*"); //Set Variable to Non Allocated
}
else if (m == MTALS) {
else if (m & MTALS) {
setlbl(vrname);
skpspc();
expect('=');
skpspc();
if (isnpre()) prsnum(0xFFFF); else prsvar(FALSE);
if (isnpre()) prsnum(0xFFFF); else prsvar(FALSE, FALSE);
asmlin(EQUOP, word);
strcpy(value, "*"); //Set Variable to Non Allocated
}
@ -253,22 +256,24 @@ void addvar(int m, int t) {
if (!alcvar) strcpy(value, "*");
}
setvar(m, t); //Add to Variable Table
if (m < MTZP && t != VTSTRUCT ) prsdat(); //Parse Variable Data
if (look('=')) prsdat(m); //Parse Variable Data
varcnt++; //Increment Variable Counter
}
/* Write Variable Table */
void vartbl(void) {
/* Write Variable Definitions *
* Args: m = write CONST vars flag */
void vardef(int m) {
int i, j;
DEBUG("Writing Variable Table\n", 0)
fprintf(logfil, "\n%-31s %s %s %s %s\n", "Variable", "Type", "Size", "Struct", "Data");
fprintf(logfil, "\n%-31s %s %s %s %s\n", "Variable", "Mod", "Type", "Size", "Struct", "Data");
dlen = 0;
for (i=0; i<varcnt; i++) {
fprintf(logfil, "%-31s %4d %4s %6d %1d-%d\n", varnam[i], vartyp[i], varsiz[i], varstc[i], dattyp[i], datlen[i]);
if ((varmod[i] & MTCONST) != m) continue;
fprintf(logfil, "%-8s %3d %4d %4s %6d %1d-%d\n", varnam[i], varmod[i], vartyp[i], varsiz[i], varstc[i], dattyp[i], datlen[i]);
strcpy(lblasm, varnam[i]);
DEBUG("Set Label to '%s'\n", lblasm)
if (strcmp(varsiz[i], "*") == 0) continue;
if (varmod[i] == MTALGN) {
if (varmod[i] & MTALGN) {
DEBUG("Aligning variable '%s'\n", varnam[i])
asmlin(ALNOP, "256");
}
@ -296,6 +301,15 @@ void vartbl(void) {
vrwrtn = TRUE;
}
/* Write Variable Table */
void vartbl(void) {
LCMNT("Variables declared CONST")
vardef(MTCONST); //Write CONST Definitions
//Emit Segment Mnemonic for RAM Variables here
LCMNT("Writable Variables")
vardef(0); //Write All Other Variables
}
/* Parse and Compile Struct Declaration */
void addstc(void) {
if (!fndstc(word)) ERROR("Undefined Struct '%s\n", word,EXIT_FAILURE)

11
src/vars.h
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@ -48,7 +48,12 @@ int dsize; //Total Data Length
enum dtypes {DTBYTE, DTSTR, DTARRY}; //Variable Data Types
enum mtypes {MTNONE, MTALGN, MTZP, MTALS, MTLOCAL}; //Variable Modifier Types
/*Variable Modifier Types (Bit Mask) */
#define MTNONE 0 //No Modifier
#define MTCONST 1 //Constant
#define MTZP 2 //Zero Page
#define MTALS 4 //Alias
#define MTALGN 128 //Aligned
int symdef(char *name); //Is Variable defined (TRUE or FALSE)
int zpaddr; //Current Zero-Page Address
@ -56,12 +61,12 @@ int zpaddr; //Current Zero-Page Address
void addvar(int m, int t); //Parse and Compile Variable Declaration
void addstc(); //Parse and Compile Structure Declaration
void defstc(); //Parse Structure Definition
void chksym(int alwreg, char *name); //Error if Variable not defined
void chksym(int alwreg, int alwcon, char *name); //Error if Variable not defined
void prsdts(); //Parse Data String
void setdat(); //Set Variable Data
void setvar(int m, int t); //Set Variable Name and Size
void prsdts(); //Parse Data String
void prsvar(int alwreg); //Parse Variable
void prsvar(int alwreg, int alwcon); //Parse Variable
void prsmbr(char* name); //Parse Struct Member
int psizof(void); //Parse SizeOf Operator
int pidxof(void); //Parse IndexOf Operator

24
test/const.c02
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@ -1,20 +1,28 @@
/* Test C02 define directive */
#pragma origin 1000
#pragma origin 1024
const #TRUE = $FF, #FALSE = 0;
#define TRUE $FF
#define FALSE 0
const #BITS = %01010101;
const #ZED = 'Z';
#define BITS %01010101
#define ZED 'Z'
enum {SOLO};
enum {BLACK, WHITE, RED, CYAN, PURPLE, GREEN, BLUE, YELLOW};
enum {NONE, FIRST, SECOND, THIRD};
enum {ZERO, ONE, TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, TEN};
char a = {#TRUE, #FALSE};
char b;
char f = #FALSE;
char t = #TRUE;
//char b = #TRUE; - Error
char b,i;
aligned const char v = {0,1,2,3,4,5,6,7,8,9};
aligned char m[255];
const char tandf = {#TRUE, #FALSE};
const char t = #TRUE, f = #FALSE;
b = #TRUE;
b = tandf[i];
//t = #FALSE; - Errors
//b, t = test();
//b, i, t = test();