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(uxnasm) Removed program struct

This commit is contained in:
Devine Lu Linvega 2024-03-27 11:01:58 -07:00
parent 93a409500a
commit 41331ee4fc
1 changed files with 63 additions and 67 deletions
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130
src/uxnasm.c
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@ -23,18 +23,14 @@ typedef struct {
Uint16 addr, refs;
} Item;
typedef struct {
int ptr, length;
Uint8 data[LENGTH];
Uint8 lambda_stack[0x100], lambda_ptr, lambda_len;
Uint16 line, label_len, macro_len, refs_len;
Item labels[0x400], refs[0x1000], macros[0x100];
} Program;
static char source[0x40], token[0x40], scope[0x40], sublabel[0x80], lambda[0x05];
static char dict[0x10000], *storenext = dict;
Program p;
static int ptr, length, line;
static Uint8 data[LENGTH];
static Uint16 label_len, refs_len, macro_len;
static Item labels[0x400], refs[0x1000], macros[0x100];
static Uint8 lambda_stack[0x100], lambda_ptr, lambda_len;
static char lambda[0x05];
static char source[0x40], token[0x40], scope[0x40], sublabel[0x80];
static char dict[0x10000], *dictnext = dict;
/* clang-format off */
@ -53,28 +49,28 @@ static int shex(char *s) { int n = 0; char c; while((c = *s++)) { n = n << 4,
static int scmp(char *a, char *b, int len) { int i = 0; while(a[i] == b[i]) if(!a[i] || ++i >= len) return 1; return 0; } /* str compare */
static int slen(char *s) { int i = 0; while(s[i]) i++; return i; } /* str length */
static char *scpy(char *src, char *dst, int len) { int i = 0; while((dst[i] = src[i]) && i < len - 2) i++; dst[i + 1] = '\0'; return dst; } /* str copy */
static char *scat(char *dst, char *src) { char *ptr = dst + slen(dst); while(*src) *ptr++ = *src++; *ptr = '\0'; return dst; } /* str cat */
static char *push(char *s, char c) { char *ptr = storenext; while((*storenext++ = *s++) && *s); *storenext++ = c; return ptr; } /* save str */
static char *scat(char *dst, char *src) { char *o = dst + slen(dst); while(*src) *o++ = *src++; *o = '\0'; return dst; } /* str cat */
static char *push(char *s, char c) { char *o = dictnext; while((*dictnext++ = *s++) && *s); *dictnext++ = c; return o; } /* save str */
#define isopcode(x) (findopcode(x) || scmp(x, "BRK", 4))
#define writeshort(x) (writebyte(x >> 8) && writebyte(x & 0xff))
#define makesublabel(x) push(scat(scat(scpy(scope, sublabel, 0x40), "/"), x), 0)
#define findlabel(x) finditem(x, p.labels, p.label_len)
#define findmacro(x) finditem(x, p.macros, p.macro_len)
#define findlabel(x) finditem(x, labels, label_len)
#define findmacro(x) finditem(x, macros, macro_len)
#define error_top(name, msg) !!fprintf(stderr, "%s: %s\n", name, msg)
#define error_asm(name) !!fprintf(stderr, "%s: %s in @%s, %s:%d.\n", name, token, scope, source, p.line)
#define error_asm(name) !!fprintf(stderr, "%s: %s in @%s, %s:%d.\n", name, token, scope, source, line)
/* clang-format on */
static int parse(char *w, FILE *f);
static Item *
finditem(char *name, Item *list, int length)
finditem(char *name, Item *list, int len)
{
int i;
if(name[0] == '&')
name = makesublabel(name + 1);
for(i = 0; i < length; i++)
for(i = 0; i < len; i++)
if(scmp(list[i].name, name, 0x40))
return &list[i];
return NULL;
@ -130,10 +126,10 @@ makemacro(char *name, FILE *f)
if(findmacro(name)) return error_asm("Macro is duplicate");
if(sihx(name)) return error_asm("Macro is hex number");
if(isopcode(name)) return error_asm("Macro is opcode");
if(p.macro_len == 0x100) return error_asm("Macros limit exceeded");
m = &p.macros[p.macro_len++];
if(macro_len == 0x100) return error_asm("Macros limit exceeded");
m = &macros[macro_len++];
m->name = push(name, 0);
m->content = storenext;
m->content = dictnext;
while(fscanf(f, "%63s", word) == 1) {
if(word[0] == '{') continue;
if(word[0] == '}') break;
@ -144,7 +140,7 @@ makemacro(char *name, FILE *f)
}
push(word, ' ');
}
*storenext++ = 0;
*dictnext++ = 0;
return 1;
}
@ -159,9 +155,9 @@ makelabel(char *name, int setscope)
if(sihx(name)) return error_asm("Label is hex number");
if(isopcode(name)) return error_asm("Label is opcode");
if(cndx(runes, name[0]) >= 0) return error_asm("Label name is runic");
if(p.label_len == 0x400) return error_asm("Labels limit exceeded");
l = &p.labels[p.label_len++];
l->addr = p.ptr;
if(label_len == 0x400) return error_asm("Labels limit exceeded");
l = &labels[label_len++];
l->addr = ptr;
l->refs = 0;
l->name = push(name, 0);
if(setscope) {
@ -186,11 +182,11 @@ static int
makepad(char *w)
{
Item *l;
int rel = w[0] == '$' ? p.ptr : 0;
int rel = w[0] == '$' ? ptr : 0;
if(sihx(w + 1))
p.ptr = shex(w + 1) + rel;
ptr = shex(w + 1) + rel;
else if((l = findlabel(w + 1)))
p.ptr = l->addr + rel;
ptr = l->addr + rel;
else
return error_asm("Invalid padding");
return 1;
@ -200,12 +196,12 @@ static int
addref(char *label, char rune, Uint16 addr)
{
Item *r;
if(p.refs_len >= 0x1000)
if(refs_len >= 0x1000)
return error_asm("References limit exceeded");
r = &p.refs[p.refs_len++];
r = &refs[refs_len++];
if(label[0] == '{') {
p.lambda_stack[p.lambda_ptr++] = p.lambda_len;
r->name = push(makelambda(p.lambda_len++), 0);
lambda_stack[lambda_ptr++] = lambda_len;
r->name = push(makelambda(lambda_len++), 0);
} else if(label[0] == '&' || label[0] == '/') {
r->name = makesublabel(label + 1);
} else
@ -218,14 +214,14 @@ addref(char *label, char rune, Uint16 addr)
static int
writebyte(Uint8 b)
{
if(p.ptr < TRIM)
if(ptr < TRIM)
return error_asm("Writing in zero-page");
else if(p.ptr >= 0x10000)
else if(ptr >= 0x10000)
return error_asm("Writing outside memory");
else if(p.ptr < p.length)
else if(ptr < length)
return error_asm("Writing rewind");
p.data[p.ptr++] = b;
p.length = p.ptr;
data[ptr++] = b;
length = ptr;
return 1;
}
@ -265,7 +261,7 @@ walkfile(FILE *f)
if(c < 0x21) {
*cptr++ = 0x00;
if(c == 0x0a)
p.line++;
line++;
if(token[0] && !parse(token, f))
return 0;
cptr = token;
@ -285,7 +281,7 @@ makeinclude(char *filename)
if(!(f = fopen(filename, "r")))
return error_top("Invalid source", filename);
scpy(filename, source, 0x40);
p.line = 0;
line = 0;
res = walkfile(f);
fclose(f);
return res;
@ -303,16 +299,16 @@ parse(char *w, FILE *f)
case '@': return !makelabel(w + 1, 1) ? error_asm("Invalid label") : 1;
case '&': return !makelabel(w, 0) ? error_asm("Invalid sublabel") : 1;
case '#': return !sihx(w + 1) || !writehex(w) ? error_asm("Invalid hexadecimal") : 1;
case '_': return addref(w + 1, w[0], p.ptr) && writebyte(0xff);
case ',': return addref(w + 1, w[0], p.ptr + 1) && writebyte(findopcode("LIT")) && writebyte(0xff);
case '-': return addref(w + 1, w[0], p.ptr) && writebyte(0xff);
case '.': return addref(w + 1, w[0], p.ptr + 1) && writebyte(findopcode("LIT")) && writebyte(0xff);
case '_': return addref(w + 1, w[0], ptr) && writebyte(0xff);
case ',': return addref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT")) && writebyte(0xff);
case '-': return addref(w + 1, w[0], ptr) && writebyte(0xff);
case '.': return addref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT")) && writebyte(0xff);
case ':': fprintf(stderr, "Deprecated rune %s, use =%s\n", w, w + 1); /* fall-through */
case '=': return addref(w + 1, w[0], p.ptr) && writeshort(0xffff);
case ';': return addref(w + 1, w[0], p.ptr + 1) && writebyte(findopcode("LIT2")) && writeshort(0xffff);
case '?': return addref(w + 1, w[0], p.ptr + 1) && writebyte(0x20) && writeshort(0xffff);
case '!': return addref(w + 1, w[0], p.ptr + 1) && writebyte(0x40) && writeshort(0xffff);
case '}': return !makelabel(makelambda(p.lambda_stack[--p.lambda_ptr]), 0) ? error_asm("Invalid label") : 1;
case '=': return addref(w + 1, w[0], ptr) && writeshort(0xffff);
case ';': return addref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT2")) && writeshort(0xffff);
case '?': return addref(w + 1, w[0], ptr + 1) && writebyte(0x20) && writeshort(0xffff);
case '!': return addref(w + 1, w[0], ptr + 1) && writebyte(0x40) && writeshort(0xffff);
case '}': return !makelabel(makelambda(lambda_stack[--lambda_ptr]), 0) ? error_asm("Invalid label") : 1;
case '$':
case '|': return !makepad(w) ? error_asm("Invalid padding") : 1;
case '[':
@ -330,7 +326,7 @@ parse(char *w, FILE *f)
else if((m = findmacro(w)))
return walkmacro(m);
else
return addref(w, ' ', p.ptr + 1) && writebyte(0x60) && writeshort(0xffff);
return addref(w, ' ', ptr + 1) && writebyte(0x60) && writeshort(0xffff);
}
return 1;
}
@ -341,16 +337,16 @@ resolve(void)
Item *l;
int i;
Uint16 a;
for(i = 0; i < p.refs_len; i++) {
Item *r = &p.refs[i];
Uint8 *rom = p.data + r->addr;
for(i = 0; i < refs_len; i++) {
Item *r = &refs[i];
Uint8 *rom = data + r->addr;
switch(r->rune) {
case '_':
case ',':
if(!(l = findlabel(r->name)))
return error_top("Unknown relative reference", r->name);
*rom = (Sint8)(l->addr - r->addr - 2);
if((Sint8)p.data[r->addr] != (l->addr - r->addr - 2))
if((Sint8)data[r->addr] != (l->addr - r->addr - 2))
return error_top("Relative reference is too far", r->name);
l->refs++;
break;
@ -387,16 +383,16 @@ static void
review(char *filename)
{
int i;
for(i = 0; i < p.label_len; i++)
if(p.labels[i].name[0] - 'A' > 25 && !p.labels[i].refs)
fprintf(stdout, "-- Unused label: %s\n", p.labels[i].name);
for(i = 0; i < label_len; i++)
if(labels[i].name[0] - 'A' > 25 && !labels[i].refs)
fprintf(stdout, "-- Unused label: %s\n", labels[i].name);
fprintf(stdout,
"Assembled %s in %d bytes(%.2f%% used), %d labels, %d macros.\n",
filename,
p.length - TRIM,
(p.length - TRIM) / 652.80,
p.label_len,
p.macro_len);
length - TRIM,
(length - TRIM) / 652.80,
label_len,
macro_len);
}
static void
@ -409,11 +405,11 @@ writesym(char *filename)
return;
fp = fopen(scat(scpy(filename, symdst, slen(filename) + 1), ".sym"), "w");
if(fp != NULL) {
for(i = 0; i < p.label_len; i++) {
Uint8 hb = p.labels[i].addr >> 8, lb = p.labels[i].addr;
for(i = 0; i < label_len; i++) {
Uint8 hb = labels[i].addr >> 8, lb = labels[i].addr;
fwrite(&hb, 1, 1, fp);
fwrite(&lb, 1, 1, fp);
fwrite(p.labels[i].name, slen(p.labels[i].name) + 1, 1, fp);
fwrite(labels[i].name, slen(labels[i].name) + 1, 1, fp);
}
}
fclose(fp);
@ -423,15 +419,15 @@ int
main(int argc, char *argv[])
{
FILE *dst;
p.ptr = 0x100;
ptr = 0x100;
scpy("on-reset", scope, 0x40);
if(argc == 1) return error_top("usage", "uxnasm [-v] input.tal output.rom");
if(scmp(argv[1], "-v", 2)) return !fprintf(stdout, "Uxnasm - Uxntal Assembler, 26 Mar 2024.\n");
if(!makeinclude(argv[1]) || !resolve()) return !error_top("Assembly", "Failed to assemble rom.");
if(!(dst = fopen(argv[2], "wb"))) return !error_top("Invalid Output", argv[2]);
if(p.length <= TRIM) return !error_top("Assembly", "Output rom is empty.");
if(length <= TRIM) return !error_top("Assembly", "Output rom is empty.");
review(argv[2]);
fwrite(p.data + TRIM, p.length - TRIM, 1, dst);
fwrite(data + TRIM, length - TRIM, 1, dst);
writesym(argv[2]);
return 0;
}