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fix memory leak + add function to convert to string

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r4 2021-12-29 22:15:56 +01:00
parent 4d5cd93354
commit 6f91a71306
2 changed files with 59 additions and 10 deletions
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35
main.c
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@ -127,6 +127,40 @@ static Value fn_ptr(Value *args) {
return (Value){ .type = TypePtr, .Ptr = { .type = TypeVoid, .val = NULL }};
}
static Value fn_string(Value *args) {
char *res = xmalloc(64);
size_t len;
switch (args[0].type) {
case TypeVoid: strcpy(res, "(void)"); len = 6; break;
case TypeFloat: len = snprintf(res, 64, "%f", args[0].Float); break;
case TypeInt: len = snprintf(res, 64, "%zd", args[0].Int); break;
case TypeBool:
if (args[0].Bool) {
strcpy(res, "true");
len = 4;
} else {
strcpy(res, "false");
len = 5;
}
break;
case TypeChar: res[0] = args[0].Char; len = 1; break;
default: ASSERT_UNREACHED();
}
return (Value){
.type = TypeArr,
.Arr = {
.is_string = true,
.dynamically_allocated = true,
.type = TypeChar,
.vals = res,
.len = len,
.cap = 64,
},
};
}
static Value fn_pow(Value *args) {
if (!(args[0].type == TypeFloat && args[1].type == TypeFloat)) {
set_err("pow() requires arguments of type float");
@ -239,6 +273,7 @@ int main(int argc, const char **argv) {
{ .name = "bool", .kind = FuncFixedArgs, .returns = true, .side_effects = false, .FixedArgs = { .n_args = 1, .WithRet.func = fn_bool, }},
{ .name = "char", .kind = FuncFixedArgs, .returns = true, .side_effects = false, .FixedArgs = { .n_args = 1, .WithRet.func = fn_char, }},
{ .name = "ptr", .kind = FuncFixedArgs, .returns = true, .side_effects = false, .FixedArgs = { .n_args = 0, .WithRet.func = fn_ptr, }},
{ .name = "string", .kind = FuncFixedArgs, .returns = true, .side_effects = false, .FixedArgs = { .n_args = 1, .WithRet.func = fn_string, }},
{ .name = "pow", .kind = FuncFixedArgs, .returns = true, .side_effects = false, .FixedArgs = { .n_args = 2, .WithRet.func = fn_pow, }},
{ .name = "sleep", .kind = FuncFixedArgs, .returns = false, .side_effects = true, .FixedArgs = { .n_args = 1, .NoRet.func = fn_sleep, }},
{ .name = "getln", .kind = FuncFixedArgs, .returns = true, .side_effects = true, .FixedArgs = { .n_args = 0, .WithRet.func = fn_getln, }},

14
parse.c
View File

@ -31,6 +31,7 @@ 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 bool expr_flush_ir_and_maybe_return(IRList *out_ir, TokList *toks, IRTok instr, TokListItem *expr_start, Scope *expr_scope, TokListItem *t, ExprRet *out_ret);
static void make_value_statically_allocated(Value *v);
static ExprRet expr(IRList *out_ir, TokList *toks, Map *funcs, Scope *parent_sc, TokListItem *t);
static void expr_into_addr(IRList *out_ir, TokList *toks, Map *funcs, Scope *parent_sc, TokListItem *t, size_t addr);
static IRParam expr_into_irparam(IRList *out_ir, TokList *toks, Map *funcs, Scope *parent_sc, TokListItem *t);
@ -160,6 +161,13 @@ static bool expr_flush_ir_and_maybe_return(IRList *out_ir, TokList *toks, IRTok
}
}
static void make_value_statically_allocated(Value *v) {
switch (v->type) {
case TypeArr: v->Arr.dynamically_allocated = false; break;
default: break;
}
}
/* The job of this function is to reduce the expression to the most simple form
* writing the least IR instructions possible (without overanalyzing).
* This means that the only IR instructions it will be writing are those for
@ -355,6 +363,12 @@ static ExprRet expr(IRList *out_ir, TokList *toks, Map *funcs, Scope *parent_sc,
func.VarArgs.WithRet.func(args_len - func.VarArgs.min_args, arg_vals)
: func.FixedArgs.WithRet.func(arg_vals),
};
/* since we have a literal return value, we want it to be fully treated like one by the memory manager */
make_value_statically_allocated(&func_ident->tok.Val);
/* immediately free any heap-allocated literals that are no longer needed */
for (size_t i = 0; i < args_len; i++)
free_value(&arg_vals[i], true);
/* free buffers */
if (arg_vals)
free(arg_vals);
if (args)