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(uxnasm) Pass context with path

This commit is contained in:
Devine Lu Linvega 2024-03-27 13:43:13 -07:00
parent c3738a9eb0
commit 0f64cb61e9
1 changed files with 47 additions and 40 deletions
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87
src/uxnasm.c
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@ -22,6 +22,11 @@ typedef struct {
Uint16 addr, refs;
} Item;
typedef struct {
char *path;
int line;
} Context;
static int ptr, length;
static char source[0x40], token[0x40], scope[0x40], sublabel[0x80], lambda[0x05];
static char dict[0x10000], *dictnext = dict;
@ -50,16 +55,16 @@ static char *scat(char *dst, char *src) { char *o = dst + slen(dst); while(*src)
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, ln) && writebyte(x & 0xff, ln))
#define writeshort(x) (writebyte(x >> 8, ctx) && writebyte(x & 0xff, ctx))
#define makesublabel(x) push(scat(scat(scpy(scope, sublabel, 0x40), "/"), x), 0)
#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, *ln)
#define error_asm(name) !fprintf(stderr, "%s: %s in @%s, %s:%d.\n", name, token, scope, source, ctx->line)
/* clang-format on */
static int parse(char *w, FILE *f, int *ln);
static int parse(char *w, FILE *f, Context *ctx);
static Item *
finditem(char *name, Item *list, int len)
@ -100,12 +105,12 @@ findopcode(char *s)
}
static int
walkcomment(FILE *f, int *ln)
walkcomment(FILE *f, Context *ctx)
{
char c;
int depth = 1;
while(f && fread(&c, 1, 1, f)) {
if(c == 0xa) *ln += 1;
if(c == 0xa) ctx->line += 1;
if(c == '(') depth++;
if(c == ')' && --depth < 1) return 1;
}
@ -113,13 +118,13 @@ walkcomment(FILE *f, int *ln)
}
static int
walkmacro(Item *m, int *ln)
walkmacro(Item *m, Context *ctx)
{
char c, *contentptr = m->content, *cptr = token;
while((c = *contentptr++)) {
if(c < 0x21) {
*cptr++ = 0x00;
if(token[0] && !parse(token, NULL, ln)) return 0;
if(token[0] && !parse(token, NULL, ctx)) return 0;
cptr = token;
} else
*cptr++ = c;
@ -128,14 +133,14 @@ walkmacro(Item *m, int *ln)
}
static int
walkfile(FILE *f, int *ln)
walkfile(FILE *f, Context *ctx)
{
char c, *cptr = token;
while(f && fread(&c, 1, 1, f)) {
if(c == 0xa) *ln += 1;
if(c == 0xa) ctx->line += 1;
if(c < 0x21) {
*cptr++ = 0x00;
if(token[0] && !parse(token, f, ln))
if(token[0] && !parse(token, f, ctx))
return 0;
cptr = token;
} else if(cptr - token < 0x3f)
@ -147,7 +152,7 @@ walkfile(FILE *f, int *ln)
}
static int
makemacro(char *name, FILE *f, int *ln)
makemacro(char *name, FILE *f, Context *ctx)
{
char c;
Item *m;
@ -160,11 +165,11 @@ makemacro(char *name, FILE *f, int *ln)
m->name = push(name, 0);
m->content = dictnext;
while(f && fread(&c, 1, 1, f) && c != '{')
if(c == 0xa) *ln += 1;
if(c == 0xa) ctx->line += 1;
while(f && fread(&c, 1, 1, f) && c != '}') {
if(c == 0xa) *ln += 1;
if(c == 0xa) ctx->line += 1;
if(c == '%') return 0;
if(c == '(') walkcomment(f, ln);
if(c == '(') walkcomment(f, ctx);
*dictnext++ = c;
}
*dictnext++ = 0;
@ -172,7 +177,7 @@ makemacro(char *name, FILE *f, int *ln)
}
static int
makelabel(char *name, int setscope, int *ln)
makelabel(char *name, int setscope, Context *ctx)
{
Item *l;
if(name[0] == '&')
@ -237,7 +242,7 @@ addref(char *label, char rune, Uint16 addr)
}
static int
writebyte(Uint8 b, int *ln)
writebyte(Uint8 b, Context *ctx)
{
if(ptr < PAGE)
return error_asm("Writing in zero-page");
@ -251,12 +256,12 @@ writebyte(Uint8 b, int *ln)
}
static int
writehex(char *w, int *ln)
writehex(char *w, Context *ctx)
{
if(*w == '#')
writebyte(findopcode("LIT") | (slen(++w) > 2) << 5, ln);
writebyte(findopcode("LIT") | (slen(++w) > 2) << 5, ctx);
if(slen(w) == 2)
return writebyte(shex(w), ln);
return writebyte(shex(w), ctx);
else if(slen(w) == 4)
return writeshort(shex(w));
else
@ -267,37 +272,39 @@ static int
makeinclude(char *filename)
{
FILE *f;
int res = 0, ln = 0;
int res = 0;
Context ctx;
ctx.line = 0;
if(!(f = fopen(filename, "r")))
return error_top("Invalid source", filename);
scpy(filename, source, 0x40);
res = walkfile(f, &ln);
res = walkfile(f, &ctx);
fclose(f);
return res;
}
static int
parse(char *w, FILE *f, int *ln)
parse(char *w, FILE *f, Context *ctx)
{
char c;
Item *m;
switch(w[0]) {
case '(': return !walkcomment(f, ln) ? error_asm("Invalid comment") : 1;
case '(': return !walkcomment(f, ctx) ? error_asm("Invalid comment") : 1;
case '~': return !makeinclude(w + 1) ? error_asm("Invalid include") : 1;
case '%': return !makemacro(w + 1, f, ln) ? error_asm("Invalid macro") : 1;
case '@': return !makelabel(w + 1, 1, ln) ? error_asm("Invalid label") : 1;
case '&': return !makelabel(w, 0, ln) ? error_asm("Invalid sublabel") : 1;
case '#': return !sihx(w + 1) || !writehex(w, ln) ? error_asm("Invalid hexadecimal") : 1;
case '_': return addref(w + 1, w[0], ptr) && writebyte(0xff, ln);
case ',': return addref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT"), ln) && writebyte(0xff, ln);
case '-': return addref(w + 1, w[0], ptr) && writebyte(0xff, ln);
case '.': return addref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT"), ln) && writebyte(0xff, ln);
case '%': return !makemacro(w + 1, f, ctx) ? error_asm("Invalid macro") : 1;
case '@': return !makelabel(w + 1, 1, ctx) ? error_asm("Invalid label") : 1;
case '&': return !makelabel(w, 0, ctx) ? error_asm("Invalid sublabel") : 1;
case '#': return !sihx(w + 1) || !writehex(w, ctx) ? error_asm("Invalid hexadecimal") : 1;
case '_': return addref(w + 1, w[0], ptr) && writebyte(0xff, ctx);
case ',': return addref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT"), ctx) && writebyte(0xff, ctx);
case '-': return addref(w + 1, w[0], ptr) && writebyte(0xff, ctx);
case '.': return addref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT"), ctx) && writebyte(0xff, ctx);
case ':': fprintf(stderr, "Deprecated rune %s, use =%s\n", w, w + 1); /* fall-through */
case '=': return addref(w + 1, w[0], ptr) && writeshort(0xffff);
case ';': return addref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT2"), ln) && writeshort(0xffff);
case '?': return addref(w + 1, w[0], ptr + 1) && writebyte(0x20, ln) && writeshort(0xffff);
case '!': return addref(w + 1, w[0], ptr + 1) && writebyte(0x40, ln) && writeshort(0xffff);
case '}': return !makelabel(makelambda(lambda_stack[--lambda_ptr]), 0, ln) ? error_asm("Invalid label") : 1;
case ';': return addref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT2"), ctx) && writeshort(0xffff);
case '?': return addref(w + 1, w[0], ptr + 1) && writebyte(0x20, ctx) && writeshort(0xffff);
case '!': return addref(w + 1, w[0], ptr + 1) && writebyte(0x40, ctx) && writeshort(0xffff);
case '}': return !makelabel(makelambda(lambda_stack[--lambda_ptr]), 0, ctx) ? error_asm("Invalid label") : 1;
case '$':
case '|': return !makepad(w) ? error_asm("Invalid padding") : 1;
case '[':
@ -305,17 +312,17 @@ parse(char *w, FILE *f, int *ln)
if(slen(w) == 1) break; /* else fallthrough */
case '"': /* raw string */
while((c = *(++w)))
if(!writebyte(c, ln)) return 0;
if(!writebyte(c, ctx)) return 0;
break;
default:
if(sihx(w))
return writehex(w, ln);
return writehex(w, ctx);
else if(isopcode(w))
return writebyte(findopcode(w), ln);
return writebyte(findopcode(w), ctx);
else if((m = findmacro(w)))
return walkmacro(m, ln);
return walkmacro(m, ctx);
else
return addref(w, ' ', ptr + 1) && writebyte(0x60, ln) && writeshort(0xffff);
return addref(w, ' ', ptr + 1) && writebyte(0x60, ctx) && writeshort(0xffff);
}
return 1;
}