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add builtin functions

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r4
2021-12-22 16:09:52 +01:00
parent 41a5dba208
commit 5dd15ce9f1
6 changed files with 239 additions and 41 deletions
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155
parse.c
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@@ -30,8 +30,8 @@ static size_t get_ident_addr(const Scope *sc, const char *name, const Tok *errpo
static IRParam tok_to_irparam(Scope *sc, Tok *t);
static Scope make_scope(Scope *parent, bool with_idents);
static void term_scope(Scope *sc);
static void expr(IRToks *out_ir, TokList *toks, Scope *parent_sc, TokListItem *t, ExprMode mode);
static void stmt(IRToks *out_ir, TokList *toks, Scope *sc, TokListItem *t);
static void expr(IRToks *out_ir, TokList *toks, Map *funcs, Scope *parent_sc, TokListItem *t, ExprMode mode);
static void stmt(IRToks *out_ir, TokList *toks, Map *funcs, Scope *sc, TokListItem *t);
static void mark_err(const Tok *t) {
err_ln = t->ln;
@@ -91,7 +91,7 @@ static void term_scope(Scope *sc) {
map_term(&sc->ident_addrs);
}
static void expr(IRToks *out_ir, TokList *toks, Scope *parent_sc, TokListItem *t, ExprMode mode) {
static void expr(IRToks *out_ir, TokList *toks, Map *funcs, Scope *parent_sc, TokListItem *t, ExprMode mode) {
/* A simplified example of how the operator precedence parsing works:
* ________________________________
* Where t points to (between l_op and r_op in each step)
@@ -145,6 +145,111 @@ static void expr(IRToks *out_ir, TokList *toks, Scope *parent_sc, TokListItem *t
if (mode.ignore_newln && t->next->tok.kind == TokOp && t->next->tok.Op == OpNewLn)
toklist_del(toks, t->next, t->next);
/* Collapse function call. */
if (t->tok.kind == TokIdent && t->tok.Ident.kind == IdentName && t->next->tok.kind == TokOp && t->next->tok.Op == OpLParen) {
BuiltinFunc func;
bool exists = map_get(funcs, t->tok.Ident.Name, &func);
if (!exists) {
mark_err(&t->tok);
set_err("Unrecognized function: %s()", t->tok.Ident.Name);
return;
}
TokListItem *func_ident = t;
t = t->next->next;
toklist_del(toks, t->prev, t->prev);
size_t n_args = 0;
TokListItem *first_arg = t;
TokListItem *last_arg = NULL;
bool eval_func_in_place = !func.side_effects;
for (;;) {
n_args++;
TRY(expr(out_ir, toks, funcs, &sc, t, (ExprMode){ .kind = ExprModeJustCollapse, .ignore_newln = true }));
if (t->tok.kind == TokIdent)
eval_func_in_place = false;
if (t->next->tok.kind == TokOp) {
if (t->next->tok.Op == OpComma) {
toklist_del(toks, t->next, t->next);
t = t->next;
continue;
} else if (t->next->tok.Op == OpRParen) {
toklist_del(toks, t->next, t->next);
last_arg = t;
break;
}
}
mark_err(&t->next->tok);
set_err("Expected ',' or ')' after function argument");
return;
}
if (func.n_args != n_args) {
mark_err(&func_ident->tok);
const char *plural = func.n_args == 1 ? "" : "s";
set_err("Function %s() takes %zu argument%s but got %zu", func.name, func.n_args, plural, n_args);
return;
}
if (eval_func_in_place) {
Value *args = xmalloc(sizeof(Value) * n_args);
TokListItem *itm = first_arg;
for (size_t i = 0;; i++) {
args[i] = itm->tok.Val;
if (itm == last_arg)
break;
itm = itm->next;
}
func_ident->tok = (Tok) {
.kind = TokVal,
.Val = func.func(args),
};
free(args);
} else {
bool is_last_operation = func_ident == start && last_arg->next->tok.kind == TokOp && op_prec[last_arg->next->tok.Op] == PREC_DELIM;
IRParam *args = xmalloc(sizeof(IRParam) * n_args);
TokListItem *itm = first_arg;
for (size_t i = 0;; i++) {
TRY_ELSE(args[i] = tok_to_irparam(&sc, &itm->tok), free(args));
if (itm == last_arg)
break;
itm = itm->next;
}
size_t res_addr;
if (mode.kind == ExprModeStorageAddr && is_last_operation)
res_addr = mode.StorageAddr;
else
res_addr = sc.mem_addr++;
irtoks_app(out_ir, (IRTok){
.ln = func_ident->tok.ln,
.col = func_ident->tok.col,
.instr = IRCallInternal,
.CallI = {
.ret_addr = res_addr,
.fid = func.fid,
.args = args,
},
});
if (mode.kind == ExprModeStorageAddr && is_last_operation) {
toklist_del(toks, func_ident, func_ident);
break;
} else {
func_ident->tok = (Tok) {
.kind = TokIdent,
.Ident = {
.kind = IdentAddr,
.Addr = res_addr,
},
};
}
}
t = func_ident;
toklist_del(toks, first_arg, last_arg);
}
/* Collapse negative factor. */
if (negate) {
bool is_last_operation = t->prev == start && t->next->tok.kind == TokOp && op_prec[t->next->tok.Op] == PREC_DELIM;
@@ -329,9 +434,9 @@ static void expr(IRToks *out_ir, TokList *toks, Scope *parent_sc, TokListItem *t
}
}
static void stmt(IRToks *out_ir, TokList *toks, Scope *sc, TokListItem *t) {
static void stmt(IRToks *out_ir, TokList *toks, Map *funcs, Scope *sc, TokListItem *t) {
TokListItem *start = t;
if (t->tok.kind == TokIdent && t->tok.Ident.kind == IdentName) {
if (t->tok.kind == TokIdent && t->tok.Ident.kind == IdentName && (t->next->tok.kind == TokDeclare || t->next->tok.kind == TokAssign)) {
char *name = t->tok.Ident.Name;
t = t->next;
if (t->tok.kind == TokDeclare) {
@@ -343,13 +448,14 @@ static void stmt(IRToks *out_ir, TokList *toks, Scope *sc, TokListItem *t) {
set_err("'%s' already declared in this scope", name);
return;
}
TRY(expr(out_ir, toks, sc, t, (ExprMode){ .kind = ExprModeStorageAddr, .ignore_newln = false, .StorageAddr = addr }));
TRY(expr(out_ir, toks, funcs, sc, t, (ExprMode){ .kind = ExprModeStorageAddr, .ignore_newln = false, .StorageAddr = addr }));
} else if (t->tok.kind == TokAssign) {
t = t->next;
size_t addr;
TRY(addr = get_ident_addr(sc, name, &start->tok));
TRY(expr(out_ir, toks, sc, t, (ExprMode){ .kind = ExprModeStorageAddr, .ignore_newln = false, .StorageAddr = addr }));
}
TRY(expr(out_ir, toks, funcs, sc, t, (ExprMode){ .kind = ExprModeStorageAddr, .ignore_newln = false, .StorageAddr = addr }));
} else
ASSERT_UNREACHED();
} else if (t->tok.kind == TokOp && t->tok.Op == OpLCurl) {
Scope inner_sc = make_scope(sc, true);
for (;;) {
@@ -363,7 +469,7 @@ static void stmt(IRToks *out_ir, TokList *toks, Scope *sc, TokListItem *t) {
if (t->next->tok.Op == OpRCurl)
break;
}
TRY_ELSE(stmt(out_ir, toks, &inner_sc, t->next), term_scope(&inner_sc));
TRY_ELSE(stmt(out_ir, toks, funcs, &inner_sc, t->next), term_scope(&inner_sc));
}
term_scope(&inner_sc);
t = t->next;
@@ -392,7 +498,7 @@ static void stmt(IRToks *out_ir, TokList *toks, Scope *sc, TokListItem *t) {
/* parse condition */
IRToks cond_ir;
irtoks_init_short(&cond_ir);
TRY_ELSE(expr(&cond_ir, toks, sc, t, (ExprMode){ .kind = ExprModeJustCollapse, .ignore_newln = false }), irtoks_term(&cond_ir));
TRY_ELSE(expr(&cond_ir, toks, funcs, sc, t, (ExprMode){ .kind = ExprModeJustCollapse, .ignore_newln = true }), irtoks_term(&cond_ir));
IRParam cond_irparam;
TRY_ELSE(cond_irparam = tok_to_irparam(sc, &t->tok), irtoks_term(&cond_ir));
/* add conditional jump */
@@ -406,10 +512,8 @@ static void stmt(IRToks *out_ir, TokList *toks, Scope *sc, TokListItem *t) {
},
});
t = t->next;
/* parse loop body */
TRY_ELSE(stmt(out_ir, toks, sc, t), irtoks_term(&cond_ir));
TRY_ELSE(stmt(out_ir, toks, funcs, sc, t->next), irtoks_term(&cond_ir));
/* finally we know where the jmp from the beginning has to jump to */
out_ir->toks[jmp_instr_iaddr].Jmp.iaddr = out_ir->len;
@@ -417,19 +521,40 @@ static void stmt(IRToks *out_ir, TokList *toks, Scope *sc, TokListItem *t) {
/* append condition IR to program IR, then terminate condition IR stream */
irtoks_app_irtoks(out_ir, &cond_ir);
irtoks_term(&cond_ir);
t = t->next;
} else if (t->tok.kind == TokOp && t->tok.Op == OpNewLn) {
} else {
/* assume expression */
TRY(expr(out_ir, toks, funcs, sc, t, (ExprMode){ .kind = ExprModeJustCollapse, .ignore_newln = false }));
}
toklist_del(toks, start, t);
}
IRToks parse(TokList *toks) {
IRToks parse(TokList *toks, BuiltinFunc *builtin_funcs, size_t n_builtin_funcs) {
Map funcs;
map_init(&funcs, sizeof(BuiltinFunc));
for (size_t i = 0; i < n_builtin_funcs; i++) {
builtin_funcs[i].fid = i;
bool replaced = map_insert(&funcs, builtin_funcs[i].name, &builtin_funcs[i]);
if (replaced) {
err_ln = 0; err_col = 0;
set_err("Builtin function %s() declared more than once", builtin_funcs[i].name);
map_term(&funcs);
return (IRToks){0};
}
}
IRToks ir;
irtoks_init_long(&ir);
Scope global_scope = make_scope(NULL, true);
for (;;) {
if (toks->begin->tok.kind == TokOp && toks->begin->tok.Op == OpEOF)
break;
TRY_RET_ELSE(stmt(&ir, toks, &global_scope, toks->begin), ir, term_scope(&global_scope));
TRY_RET_ELSE(stmt(&ir, toks, &funcs, &global_scope, toks->begin), ir,
{ term_scope(&global_scope); map_term(&funcs); });
}
term_scope(&global_scope);
map_term(&funcs);
return ir;
}