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