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Stripped zero bytes at end of assembled ROM

This commit is contained in:
Andrew Alderwick 2021-04-20 20:56:43 +01:00
parent a293c1daa8
commit 65c3a72730
1 changed files with 4 additions and 3 deletions
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7
src/assembler.c
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@ -30,7 +30,7 @@ typedef struct {
typedef struct { typedef struct {
Uint8 data[256 * 256], llen, mlen; Uint8 data[256 * 256], llen, mlen;
Uint16 ptr; Uint16 ptr, length;
Label labels[256]; Label labels[256];
Macro macros[256]; Macro macros[256];
} Program; } Program;
@ -64,6 +64,7 @@ pushbyte(Uint8 b, int lit)
{ {
if(lit) pushbyte(0x01, 0); if(lit) pushbyte(0x01, 0);
p.data[p.ptr++] = b; p.data[p.ptr++] = b;
p.length = p.ptr;
} }
void void
@ -338,7 +339,7 @@ void
cleanup(char *filename) cleanup(char *filename)
{ {
int i; int i;
printf("Assembled %s(%d bytes), %d labels, %d macros.\n\n", filename, (p.ptr - TRIM), p.llen, p.mlen); printf("Assembled %s(%d bytes), %d labels, %d macros.\n\n", filename, (p.length - TRIM), p.llen, p.mlen);
for(i = 0; i < p.llen; ++i) for(i = 0; i < p.llen; ++i)
if(!p.labels[i].refs) if(!p.labels[i].refs)
printf("--- Unused label: %s\n", p.labels[i].name); printf("--- Unused label: %s\n", p.labels[i].name);
@ -357,7 +358,7 @@ main(int argc, char *argv[])
return !error("Open", "Failed"); return !error("Open", "Failed");
if(!pass1(f) || !pass2(f)) if(!pass1(f) || !pass2(f))
return !error("Assembly", "Failed"); return !error("Assembly", "Failed");
fwrite(p.data + TRIM, p.ptr - TRIM, 1, fopen(argv[2], "wb")); fwrite(p.data + TRIM, p.length - TRIM, 1, fopen(argv[2], "wb"));
fclose(f); fclose(f);
cleanup(argv[2]); cleanup(argv[2]);
return 0; return 0;