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// Logic for compiling new struct types defined in code
#include <ctype.h>
#include <gc/cord.h>
#include <gc.h>
#include <stdio.h>
#include "ast.h"
#include "builtins/text.h"
#include "compile.h"
#include "environment.h"
#include "typecheck.h"
#include "builtins/util.h"
static CORD compile_str_method(env_t *env, ast_t *ast)
{
auto def = Match(ast, StructDef);
CORD full_name = CORD_cat(namespace_prefix(env->namespace), def->name);
const char *name = def->name;
const char *dollar = strrchr(name, '$');
if (dollar) name = dollar + 1;
CORD str_func = CORD_asprintf("static CORD %r$as_text(%r_t *obj, bool use_color) {\n"
"\tif (!obj) return \"%s\";\n", full_name, full_name, name);
if (def->secret) {
CORD_appendf(&str_func, "\treturn use_color ? \"\\x1b[0;1m%s\\x1b[m(\\x1b[2m...\\x1b[m)\" : \"%s(...)\";\n}",
name, name);
} else {
CORD_appendf(&str_func, "\treturn CORD_all(use_color ? \"\\x1b[0;1m%s\\x1b[m(\" : \"%s(\"", name, name);
for (arg_ast_t *field = def->fields; field; field = field->next) {
type_t *field_type = get_arg_ast_type(env, field);
CORD field_str = expr_as_text(env, CORD_cat("obj->", field->name), field_type, "use_color");
CORD_appendf(&str_func, ", \"%s=\", %r", field->name, field_str);
if (field->next) CORD_appendf(&str_func, ", \", \"");
}
CORD_appendf(&str_func, ", \")\");\n}\n");
}
return str_func;
}
static CORD compile_compare_method(env_t *env, ast_t *ast)
{
auto def = Match(ast, StructDef);
CORD full_name = CORD_cat(namespace_prefix(env->namespace), def->name);
CORD cmp_func = CORD_all("static int ", full_name, "$compare(const ", full_name, "_t *x, const ", full_name,
"_t *y, const TypeInfo *info) {\n"
"(void)info;\n",
"int diff;\n");
for (arg_ast_t *field = def->fields; field; field = field->next) {
type_t *field_type = get_arg_ast_type(env, field);
switch (field_type->tag) {
case BoolType: case IntType: case NumType: case PointerType: case FunctionType:
cmp_func = CORD_all(cmp_func, "diff = (x->", field->name, " > y->", field->name, ") - (x->", field->name, " < y->", field->name, ");");
break;
case TextType:
cmp_func = CORD_all(cmp_func, "diff = CORD_cmp(x->", field->name, ", y->", field->name, ");");
break;
default:
cmp_func = CORD_all(cmp_func, "diff = generic_compare(&x->", field->name, ", &y->", field->name, ", ",
compile_type_info(env, field_type), ");\n");
break;
}
cmp_func = CORD_all(cmp_func, "if (diff != 0) return diff;\n");
}
cmp_func = CORD_all(cmp_func, "return 0;\n}\n");
return cmp_func;
}
static CORD compile_equals_method(env_t *env, ast_t *ast)
{
auto def = Match(ast, StructDef);
CORD full_name = CORD_cat(namespace_prefix(env->namespace), def->name);
CORD eq_func = CORD_all("static bool ", full_name, "$equal(const ", full_name, "_t *x, const ", full_name,
"_t *y, const TypeInfo *info) {\n"
"(void)info;\n");
CORD condition = CORD_EMPTY;
for (arg_ast_t *field = def->fields; field; field = field->next) {
if (condition != CORD_EMPTY)
condition = CORD_all(condition, " && ");
type_t *field_type = get_arg_ast_type(env, field);
switch (field_type->tag) {
case BoolType: case IntType: case NumType: case PointerType: case FunctionType:
condition = CORD_all(condition, "(x->", field->name, " == y->", field->name, ")");
break;
case TextType:
condition = CORD_all(condition, "(CORD_cmp(x->", field->name, ", y->", field->name, ") == 0)");
break;
default:
condition = CORD_all(condition, "generic_equal(&x->", field->name, ", &y->", field->name, ", ",
compile_type_info(env, field_type), ")");
break;
}
}
eq_func = CORD_all(eq_func, "return ", condition, ";\n}\n");
return eq_func;
}
static CORD compile_hash_method(env_t *env, ast_t *ast)
{
auto def = Match(ast, StructDef);
CORD full_name = CORD_cat(namespace_prefix(env->namespace), def->name);
CORD hash_func = CORD_all("static uint32_t ", full_name, "$hash(const ", full_name, "_t *obj, const TypeInfo *info) {\n"
"(void)info;\n"
"uint32_t field_hashes[] = {");
for (arg_ast_t *field = def->fields; field; field = field->next) {
type_t *field_type = get_arg_ast_type(env, field);
hash_func = CORD_all(hash_func, "\ngeneric_hash(&obj->", field->name, ", ", compile_type_info(env, field_type), "),");
}
hash_func = CORD_all(hash_func, "};\n"
"uint32_t hash;\n"
"halfsiphash(&field_hashes, sizeof(field_hashes), TOMO_HASH_VECTOR, (uint8_t*)&hash, sizeof(hash));\n"
"return hash;\n}\n");
return hash_func;
}
void compile_struct_def(env_t *env, ast_t *ast)
{
auto def = Match(ast, StructDef);
CORD full_name = CORD_cat(namespace_prefix(env->namespace), def->name);
type_t *t = Table$str_get(*env->types, def->name);
assert(t && t->tag == StructType);
auto struct_ = Match(t, StructType);
if (def->fields) {
CORD typeinfo = CORD_asprintf("public const TypeInfo %r = {%zu, %zu, {.tag=CustomInfo, .CustomInfo={",
full_name, type_size(t), type_align(t));
typeinfo = CORD_all(typeinfo, ".as_text=(void*)", full_name, "$as_text, ");
env->code->funcs = CORD_all(env->code->funcs, compile_str_method(env, ast));
if (struct_->fields && !struct_->fields->next) { // Single member, can just use its methods
type_t *member_t = struct_->fields->type;
switch (member_t->tag) {
case TextType:
typeinfo = CORD_all(typeinfo, ".hash=(void*)", type_to_cord(member_t), "$hash", ", ");
// fallthrough
case IntType: case NumType:
typeinfo = CORD_all(typeinfo, ".compare=(void*)", type_to_cord(member_t), "$compare, "
".equal=(void*)", type_to_cord(member_t), "$equal, ");
// fallthrough
case BoolType: goto got_methods;
default: break;
}
}
if (struct_->fields) {
env->code->funcs = CORD_all(env->code->funcs, compile_compare_method(env, ast),
compile_equals_method(env, ast), compile_hash_method(env, ast));
typeinfo = CORD_all(
typeinfo,
".compare=(void*)", full_name, "$compare, "
".equal=(void*)", full_name, "$equal, "
".hash=(void*)", full_name, "$hash");
}
got_methods:;
typeinfo = CORD_cat(typeinfo, "}}};\n");
env->code->typeinfos = CORD_all(env->code->typeinfos, typeinfo);
} else {
// If there are no fields, we can use an EmptyStruct typeinfo, which generates less code:
CORD typeinfo = CORD_asprintf("public const TypeInfo %r = {%zu, %zu, {.tag=EmptyStruct, .EmptyStruct.name=%r}};\n",
full_name, type_size(t), type_align(t), Text$quoted(def->name, false));
env->code->typeinfos = CORD_all(env->code->typeinfos, typeinfo);
}
compile_namespace(env, def->name, def->namespace);
}
CORD compile_struct_header(env_t *env, ast_t *ast)
{
auto def = Match(ast, StructDef);
CORD full_name = CORD_cat(namespace_prefix(env->namespace), def->name);
CORD header = CORD_all("typedef struct ", full_name, "_s ", full_name, "_t;\n");
CORD struct_code = CORD_all("struct ", full_name, "_s {\n");
for (arg_ast_t *field = def->fields; field; field = field->next) {
type_t *field_t = get_arg_ast_type(env, field);
CORD type_code = compile_type(env, field_t);
CORD_appendf(&struct_code, "%r %s%s;\n", type_code, field->name,
CORD_cmp(type_code, "Bool_t") ? "" : ":1");
}
struct_code = CORD_all(struct_code, "};\n");
header = CORD_all(header, struct_code);
header = CORD_all(header, "extern const TypeInfo ", full_name, ";\n");
header = CORD_all(header, compile_namespace_headers(env, def->name, def->namespace));
return header;
}
// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0
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