(uxnasm) Improved errors
This commit is contained in:
Devine Lu Linvega
parent
618dc4e843
commit
4f3ced9552
65
src/uxnasm.c
65
src/uxnasm.c
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@ -97,7 +97,7 @@ findopcode(char *s)
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else if(s[m] == 'k')
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i |= (1 << 7);
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else
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return error_top("Unknown opcode mode", s);
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return 0;
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m++;
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}
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return i;
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@ -115,7 +115,7 @@ walkcomment(FILE *f, Context *ctx)
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if(c == '(') depth++;
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if(c == ')' && --depth < 1) return 1;
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}
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return 0;
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return error_asm("Comment incomplete");
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}
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static int
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@ -177,9 +177,9 @@ makemacro(char *name, FILE *f, Context *ctx)
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if(c == 0xa) ctx->line += 1;
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while(f && fread(&c, 1, 1, f) && c != '}') {
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if(c == 0xa) ctx->line += 1;
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if(c == '%') return error_top("Nested macro", name);
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if(c == '(')
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walkcomment(f, ctx);
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if(c == '%') return error_top("Macro nested", name);
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if(c == '(' && !walkcomment(f, ctx))
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return 0;
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else
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*dictnext++ = c;
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}
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@ -194,8 +194,8 @@ makelabel(char *name, int setscope, Context *ctx)
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if(name[0] == '&')
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name = join(scope, '/', name + 1);
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if(labels_len >= 0x400) return error_asm("Labels limit exceeded");
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if(isinvalid(name)) return error_asm("Label is invalid");
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if(findlabel(name)) return error_asm("Label is duplicate");
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if(isinvalid(name)) return error_asm("Label invalid");
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if(findlabel(name)) return error_asm("Label duplicate");
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l = &labels[labels_len++];
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l->name = push(name, 0);
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l->addr = ptr;
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@ -223,7 +223,7 @@ makeref(char *label, char rune, Uint16 addr)
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}
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static int
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writepad(char *w)
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writepad(char *w, Context *ctx)
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{
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Item *l;
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int rel = w[0] == '$' ? ptr : 0;
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@ -235,14 +235,14 @@ writepad(char *w)
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ptr = l->addr + rel;
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return 1;
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}
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return 0;
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return error_asm("Padding invalid");
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}
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static int
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writebyte(Uint8 b, Context *ctx)
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{
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if(ptr < PAGE)
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return error_asm("Writing in zero-page");
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return error_asm("Writing zero-page");
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else if(ptr >= 0x10000)
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return error_asm("Writing outside memory");
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else if(ptr < length)
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@ -263,7 +263,7 @@ writehex(char *w, Context *ctx)
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else if(w[3] && !w[4])
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return writeshort(shex(w));
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else
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return 0;
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return error_asm("Hexadecimal invalid");
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}
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static int
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@ -271,7 +271,7 @@ writestring(char *w, Context *ctx)
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{
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char c;
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while((c = *(w++)))
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if(!writebyte(c, ctx)) return 0;
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if(!writebyte(c, ctx)) return error_asm("String invalid");
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return 1;
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}
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@ -284,7 +284,7 @@ assemble(char *filename)
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ctx.line = 0;
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ctx.path = push(filename, 0);
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if(!(f = fopen(filename, "r")))
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return error_top("Invalid source", filename);
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return error_top("Source missing", filename);
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res = walkfile(f, &ctx);
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fclose(f);
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return res;
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@ -295,12 +295,12 @@ parse(char *w, FILE *f, Context *ctx)
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{
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Item *m;
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switch(w[0]) {
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case '(': return !walkcomment(f, ctx) ? error_asm("Invalid comment") : 1;
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case '%': return !makemacro(w + 1, f, ctx) ? error_asm("Invalid macro") : 1;
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case '@': return !makelabel(w + 1, 1, ctx) ? error_asm("Invalid label") : 1;
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case '&': return !makelabel(w, 0, ctx) ? error_asm("Invalid sublabel") : 1;
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case '}': return !makelabel(makelambda(lambda_stack[--lambda_ptr]), 0, ctx) ? error_asm("Invalid label") : 1;
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case '#': return !ishex(w + 1) || !writehex(w, ctx) ? error_asm("Invalid hexadecimal") : 1;
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case '(': return walkcomment(f, ctx);
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case '%': return makemacro(w + 1, f, ctx);
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case '@': return makelabel(w + 1, 1, ctx);
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case '&': return makelabel(w, 0, ctx);
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case '}': return makelabel(makelambda(lambda_stack[--lambda_ptr]), 0, ctx);
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case '#': return ishex(w + 1) && writehex(w, ctx);
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case '_': return makeref(w + 1, w[0], ptr) && writebyte(0xff, ctx);
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case ',': return makeref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT"), ctx) && writebyte(0xff, ctx);
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case '-': return makeref(w + 1, w[0], ptr) && writebyte(0xff, ctx);
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@ -310,10 +310,10 @@ parse(char *w, FILE *f, Context *ctx)
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case ';': return makeref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT2"), ctx) && writeshort(0xffff);
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case '?': return makeref(w + 1, w[0], ptr + 1) && writebyte(0x20, ctx) && writeshort(0xffff);
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case '!': return makeref(w + 1, w[0], ptr + 1) && writebyte(0x40, ctx) && writeshort(0xffff);
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case '"': return !writestring(w + 1, ctx) ? error_asm("Invalid string") : 1;
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case '~': return !assemble(w + 1) ? error_asm("Invalid include") : 1;
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case '"': return writestring(w + 1, ctx);
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case '~': return !assemble(w + 1) ? error_asm("Include missing") : 1;
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case '$':
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case '|': return !writepad(w) ? error_asm("Invalid padding") : 1;
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case '|': return writepad(w, ctx);
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case '[':
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case ']': return 1;
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}
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@ -324,20 +324,20 @@ parse(char *w, FILE *f, Context *ctx)
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}
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static int
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resolve(void)
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resolve(char *filename)
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{
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int i, rel;
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if(!length) return error_top("Assembly", "Output rom is empty.");
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if(!length) return error_top("Output empty", filename);
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for(i = 0; i < refs_len; i++) {
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Item *r = &refs[i], *l = findlabel(r->name);
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Uint8 *rom = data + r->addr;
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if(!l) return error_top("Unknown label", r->name);
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if(!l) return error_top("Label unknown", r->name);
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switch(r->rune) {
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case '_':
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case ',':
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*rom = rel = l->addr - r->addr - 2;
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if((Sint8)data[r->addr] != rel)
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return error_top("Relative reference is too far", r->name);
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return error_top("Relative reference too far", r->name);
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break;
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case '-':
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case '.':
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@ -368,7 +368,7 @@ build(char *rompath)
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char *sympath = join(rompath, '.', "sym");
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/* rom */
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if(!(dst = fopen(rompath, "wb")))
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return !error_top("Invalid output file", rompath);
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return !error_top("Output file invalid", rompath);
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for(i = 0; i < labels_len; i++)
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if(labels[i].name[0] - 'A' > 25 && !labels[i].refs)
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fprintf(stdout, "-- Unused label: %s\n", labels[i].name);
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@ -382,7 +382,7 @@ build(char *rompath)
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macro_len);
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/* sym */
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if(!(dstsym = fopen(sympath, "w")))
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return !error_top("Invalid symbols file", sympath);
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return !error_top("Symbols file invalid", sympath);
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for(i = 0; i < labels_len; i++) {
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Uint8 hb = labels[i].addr >> 8, lb = labels[i].addr;
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char c, d = 0, *name = labels[i].name;
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@ -400,11 +400,10 @@ main(int argc, char *argv[])
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{
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ptr = PAGE;
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copy("on-reset", scope, 0);
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if(argc == 2 && scmp(argv[1], "-v", 2)) return !fprintf(stdout, "Uxnasm - Uxntal Assembler, 29 Mar 2024.\n");
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if(argc == 2 && scmp(argv[1], "-v", 2)) return !fprintf(stdout, "Uxnasm - Uxntal Assembler, 30 Mar 2024.\n");
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if(argc != 3) return error_top("usage", "uxnasm [-v] input.tal output.rom");
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if(!assemble(argv[1])) return !error_top("Assembly", "Failed to assemble rom.");
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if(!length) return !error_top("Assembly", "Output rom is empty.");
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if(!resolve()) return !error_top("Assembly", "Failed to resolve symbols.");
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if(!build(argv[2])) return !error_top("Assembly", "Failed to build rom.");
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if(!assemble(argv[1])) return 1;
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if(!resolve(argv[2])) return 1;
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if(!build(argv[2])) return 1;
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return 0;
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}
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