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(uxnasm) Generalized makesublabel

This commit is contained in:
Devine Lu Linvega 2024-03-28 13:24:41 -07:00
parent 84cc003dec
commit 9af23e1090
1 changed files with 7 additions and 9 deletions
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16
src/uxnasm.c
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@ -30,7 +30,7 @@ typedef struct {
} Context; } Context;
static int ptr, length; static int ptr, length;
static char token[0x40], scope[0x40], sublabel[0x80], lambda[0x05]; static char token[0x40], scope[0x40], lambda[0x05];
static char dict[0x4000], *dictnext = dict; static char dict[0x4000], *dictnext = dict;
static Uint8 data[0x10000], lambda_stack[0x100], lambda_ptr, lambda_len; static Uint8 data[0x10000], lambda_stack[0x100], lambda_ptr, lambda_len;
static Uint16 labels_len, refs_len, macro_len; static Uint16 labels_len, refs_len, macro_len;
@ -51,13 +51,12 @@ 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 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 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 *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 *o = dst + slen(dst); while(*src) *o++ = *src++; *o = '\0'; return dst; } /* str concat */
static char *save(char *s, char c) { char *o = dictnext; while((*dictnext++ = *s++) && *s); *dictnext++ = c; return o; } /* save to dict */ static char *save(char *s, char c) { char *o = dictnext; while((*dictnext++ = *s++) && *s); *dictnext++ = c; return o; } /* save to dict */
static char *join(char *a, char j, char *b) { char *res = dictnext; save(a, j), save(b, 0); return res; } /* join two str */
#define isopcode(x) (findopcode(x) || scmp(x, "BRK", 4)) #define isopcode(x) (findopcode(x) || scmp(x, "BRK", 4))
#define isinvalid(x) (!slen(x) || sihx(x) || isopcode(x) || cndx(runes, x[0]) >= 0) #define isinvalid(x) (!x[0] || sihx(x) || isopcode(x) || cndx(runes, x[0]) >= 0)
#define writeshort(x) (writebyte(x >> 8, ctx) && writebyte(x & 0xff, ctx)) #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, labels_len) #define findlabel(x) finditem(x, labels, labels_len)
#define findmacro(x) finditem(x, macros, macro_len) #define findmacro(x) finditem(x, macros, macro_len)
#define error_top(name, msg) !fprintf(stderr, "%s: %s\n", name, msg) #define error_top(name, msg) !fprintf(stderr, "%s: %s\n", name, msg)
@ -84,7 +83,7 @@ finditem(char *name, Item *list, int len)
{ {
int i; int i;
if(name[0] == '&') if(name[0] == '&')
name = makesublabel(name + 1); name = join(scope, '/', name + 1);
for(i = 0; i < len; i++) for(i = 0; i < len; i++)
if(scmp(list[i].name, name, 0x40)) if(scmp(list[i].name, name, 0x40))
return &list[i]; return &list[i];
@ -202,7 +201,7 @@ makelabel(char *name, int setscope, Context *ctx)
{ {
Item *l; Item *l;
if(name[0] == '&') if(name[0] == '&')
name = makesublabel(name + 1); name = join(scope, '/', name + 1);
if(labels_len >= 0x400) return error_asm("Labels limit exceeded"); if(labels_len >= 0x400) return error_asm("Labels limit exceeded");
if(isinvalid(name)) return error_asm("Label is invalid"); if(isinvalid(name)) return error_asm("Label is invalid");
if(findlabel(name)) return error_asm("Label is duplicate"); if(findlabel(name)) return error_asm("Label is duplicate");
@ -229,7 +228,7 @@ makeref(char *label, char rune, Uint16 addr)
lambda_stack[lambda_ptr++] = lambda_len; lambda_stack[lambda_ptr++] = lambda_len;
r->name = push(makelambda(lambda_len++), 0); r->name = push(makelambda(lambda_len++), 0);
} else if(label[0] == '&' || label[0] == '/') { } else if(label[0] == '&' || label[0] == '/') {
r->name = makesublabel(label + 1); r->name = join(scope, '/', label + 1);
} else } else
r->name = push(label, 0); r->name = push(label, 0);
r->rune = rune; r->rune = rune;
@ -380,7 +379,7 @@ build(char *rompath)
{ {
int i; int i;
FILE *dst, *dstsym; FILE *dst, *dstsym;
char *sympath; char *sympath = join(rompath, '.', "sym");
/* rom */ /* rom */
if(!(dst = fopen(rompath, "wb"))) if(!(dst = fopen(rompath, "wb")))
return !error_top("Invalid output file", rompath); return !error_top("Invalid output file", rompath);
@ -396,7 +395,6 @@ build(char *rompath)
labels_len, labels_len,
macro_len); macro_len);
/* sym */ /* sym */
sympath = dictnext, save(rompath, '.'), save("sym", 0);
if(!(dstsym = fopen(sympath, "w"))) if(!(dstsym = fopen(sympath, "w")))
return !error_top("Invalid symbols file", sympath); return !error_top("Invalid symbols file", sympath);
for(i = 0; i < labels_len; i++) { for(i = 0; i < labels_len; i++) {