Added #pragma padding directive

doc/c02.txt

@@ -131,6 +131,16 @@ Examples:
   #pragma origin $0400  //Compiled code starts at address 1024
   #pragma origin 8192   //Compiled code starts at address 8192
 
+PRAGMA PADDING
+
+The #pragma padding directive adds empty bytes to the end of the compiled
+program. It should be used with target systems that require the object
+code to be padded with a specific number of bytes.
+
+Examples:
+  #pragma padding 1     //Add one empty byte to end of code
+  #pragma padding $FF   //Add 255 empty bytes to end of code
+
 PRAGMA VARTABLE
 
 The #pragma vartable directive forces the variable table to be written.

src/c02.c

@@ -31,6 +31,7 @@ void init(void) {
   concnt = 0;     //Number of Constants Defined
   varcnt = 0;     //Number of Variables in Table
   lblcnt = 0;     //Number of Labels in stack
+  padcnt = 0;     //Number of Padding Bytes at End
   curcol = 0;     //Current Column in Source Code
   curlin = 0;     //Current Line in Source Code
   alcvar = TRUE;  //Allocate Variables Flag
@@ -84,6 +85,11 @@ void prolog(void) {
 
 void epilog(void) {
   if (!vrwrtn) vartbl();  //Write Variable Table
+  if (padcnt) {
+	SCMNT("PADDING BYTES")
+    sprintf(word, "$%hhX", padcnt);
+	asmlin(STROP, word);
+  }
 }
 
 /* Compile Source Code*/

src/common.h

@@ -67,6 +67,8 @@ int infunc; //Inside Function Definition Flag
 int lsrtrn; //Last Statement was a Return Flag
 int fcase;  //First Case Statement Flag
 
+int padcnt;	//Number of Padding Bytes at End of Program
+
 void exterr(int errnum);        //Print current file name & position and exit
 void expctd(char *expected);    //Print Expected message and exit
 

src/include.c

@@ -80,6 +80,12 @@ void porign(void) {
   DEBUG("Set origin to %s\n", value)
 }
 
+/* Parse Padding Subdirective */
+void ppddng(void) {
+  padcnt = prsnum(0xFF); //Get Number of Padding Bytes
+  DEBUG("Set padding to %d\n", padcnt)
+}
+
 /* Parse Zeropage Subdirective */
 void prszpg(void) {
   zpaddr = prsnum(0xFF); //Set Zero Page Address to Literal
@@ -102,6 +108,8 @@ void pprgma(void) {
     pascii(); //Parse Ascii
   else if (wordis("ORIGIN"))
     porign(); //Parse Origin
+  else if (wordis("PADDING"))
+    ppddng(); //Parse Origin
   else if (wordis("VARTABLE"))
     pvrtbl(); //Parse Vartable
   else if (wordis("ZEROPAGE"))

test/test.c02

@@ -3,6 +3,7 @@
  * Test file for Compiler                   *
  ********************************************/
 
+#pragma padding 1
 
 /* Constants */
 const #TRUE = $FF, #FALSE = 0;