385 lines
15 KiB
V
385 lines
15 KiB
V
// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license that can be found in the LICENSE file.
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module c
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import strings
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import v.ast
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fn (mut g Gen) equality_fn(typ ast.Type) string {
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g.needed_equality_fns << typ.set_nr_muls(0)
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return g.typ(g.unwrap_generic(typ).set_nr_muls(0))
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}
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fn (mut g Gen) gen_equality_fns() {
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for needed_typ in g.needed_equality_fns {
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if needed_typ in g.generated_eq_fns {
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continue
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}
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sym := g.table.get_type_symbol(needed_typ)
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match sym.kind {
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.sum_type {
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g.gen_sumtype_equality_fn(needed_typ)
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}
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.struct_ {
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g.gen_struct_equality_fn(needed_typ)
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}
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.array {
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g.gen_array_equality_fn(needed_typ)
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}
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.array_fixed {
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g.gen_fixed_array_equality_fn(needed_typ)
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}
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.map {
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g.gen_map_equality_fn(needed_typ)
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}
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.alias {
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g.gen_alias_equality_fn(needed_typ)
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}
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else {
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verror('could not generate equality function for type $sym.kind')
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}
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}
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}
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}
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fn (mut g Gen) gen_sumtype_equality_fn(left_type ast.Type) string {
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left := g.unwrap(left_type)
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ptr_styp := g.typ(left.typ.set_nr_muls(0))
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if left_type in g.generated_eq_fns {
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return ptr_styp
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}
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g.generated_eq_fns << left_type
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info := left.sym.sumtype_info()
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g.type_definitions.writeln('static bool ${ptr_styp}_sumtype_eq($ptr_styp a, $ptr_styp b); // auto')
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mut fn_builder := strings.new_builder(512)
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fn_builder.writeln('static bool ${ptr_styp}_sumtype_eq($ptr_styp a, $ptr_styp b) {')
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fn_builder.writeln('\tif (a._typ != b._typ) { return false; }')
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for typ in info.variants {
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variant := g.unwrap(typ)
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fn_builder.writeln('\tif (a._typ == $variant.typ) {')
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name := '_$variant.sym.cname'
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if variant.sym.kind == .string {
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fn_builder.writeln('\t\treturn string__eq(*a.$name, *b.$name);')
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} else if variant.sym.kind == .sum_type && !typ.is_ptr() {
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eq_fn := g.gen_sumtype_equality_fn(typ)
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fn_builder.writeln('\t\treturn ${eq_fn}_sumtype_eq(*a.$name, *b.$name);')
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} else if variant.sym.kind == .struct_ && !typ.is_ptr() {
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eq_fn := g.gen_struct_equality_fn(typ)
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fn_builder.writeln('\t\treturn ${eq_fn}_struct_eq(*a.$name, *b.$name);')
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} else if variant.sym.kind == .array && !typ.is_ptr() {
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eq_fn := g.gen_array_equality_fn(typ)
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fn_builder.writeln('\t\treturn ${eq_fn}_arr_eq(*a.$name, *b.$name);')
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} else if variant.sym.kind == .array_fixed && !typ.is_ptr() {
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eq_fn := g.gen_fixed_array_equality_fn(typ)
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fn_builder.writeln('\t\treturn ${eq_fn}_arr_eq(*a.$name, *b.$name);')
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} else if variant.sym.kind == .map && !typ.is_ptr() {
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eq_fn := g.gen_map_equality_fn(typ)
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fn_builder.writeln('\t\treturn ${eq_fn}_map_eq(*a.$name, *b.$name);')
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} else if variant.sym.kind == .alias && !typ.is_ptr() {
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eq_fn := g.gen_alias_equality_fn(typ)
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fn_builder.writeln('\t\treturn ${eq_fn}_alias_eq(*a.$name, *b.$name);')
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} else if variant.sym.kind == .function {
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fn_builder.writeln('\t\treturn *((voidptr*)(*a.$name)) == *((voidptr*)(*b.$name));')
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} else {
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fn_builder.writeln('\t\treturn *a.$name == *b.$name;')
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}
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fn_builder.writeln('\t}')
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}
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fn_builder.writeln('\treturn false;')
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fn_builder.writeln('}')
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g.auto_fn_definitions << fn_builder.str()
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return ptr_styp
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}
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fn (mut g Gen) gen_struct_equality_fn(left_type ast.Type) string {
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left := g.unwrap(left_type)
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ptr_styp := g.typ(left.typ.set_nr_muls(0))
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fn_name := ptr_styp.replace('struct ', '')
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if left_type in g.generated_eq_fns {
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return fn_name
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}
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g.generated_eq_fns << left_type
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info := left.sym.struct_info()
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g.type_definitions.writeln('static bool ${fn_name}_struct_eq($ptr_styp a, $ptr_styp b); // auto')
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mut fn_builder := strings.new_builder(512)
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defer {
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g.auto_fn_definitions << fn_builder.str()
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}
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fn_builder.writeln('static bool ${fn_name}_struct_eq($ptr_styp a, $ptr_styp b) {')
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// overloaded
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if left.sym.has_method('==') {
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fn_builder.writeln('\treturn ${fn_name}__eq(a, b);')
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fn_builder.writeln('}')
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return fn_name
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}
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fn_builder.write_string('\treturn ')
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if info.fields.len > 0 {
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for i, field in info.fields {
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if i > 0 {
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fn_builder.write_string('\n\t\t&& ')
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}
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field_type := g.unwrap(field.typ)
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field_name := c_name(field.name)
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if field_type.sym.kind == .string {
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fn_builder.write_string('string__eq(a.$field_name, b.$field_name)')
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} else if field_type.sym.kind == .sum_type && !field.typ.is_ptr() {
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eq_fn := g.gen_sumtype_equality_fn(field.typ)
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fn_builder.write_string('${eq_fn}_sumtype_eq(a.$field_name, b.$field_name)')
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} else if field_type.sym.kind == .struct_ && !field.typ.is_ptr() {
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eq_fn := g.gen_struct_equality_fn(field.typ)
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fn_builder.write_string('${eq_fn}_struct_eq(a.$field_name, b.$field_name)')
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} else if field_type.sym.kind == .array && !field.typ.is_ptr() {
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eq_fn := g.gen_array_equality_fn(field.typ)
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fn_builder.write_string('${eq_fn}_arr_eq(a.$field_name, b.$field_name)')
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} else if field_type.sym.kind == .array_fixed && !field.typ.is_ptr() {
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eq_fn := g.gen_fixed_array_equality_fn(field.typ)
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fn_builder.write_string('${eq_fn}_arr_eq(a.$field_name, b.$field_name)')
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} else if field_type.sym.kind == .map && !field.typ.is_ptr() {
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eq_fn := g.gen_map_equality_fn(field.typ)
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fn_builder.write_string('${eq_fn}_map_eq(a.$field_name, b.$field_name)')
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} else if field_type.sym.kind == .alias && !field.typ.is_ptr() {
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eq_fn := g.gen_alias_equality_fn(field.typ)
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fn_builder.write_string('${eq_fn}_alias_eq(a.$field_name, b.$field_name)')
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} else if field_type.sym.kind == .function {
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fn_builder.write_string('*((voidptr*)(a.$field_name)) == *((voidptr*)(b.$field_name))')
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} else {
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fn_builder.write_string('a.$field_name == b.$field_name')
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}
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}
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} else {
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fn_builder.write_string('true')
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}
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fn_builder.writeln(';')
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fn_builder.writeln('}')
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return fn_name
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}
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fn (mut g Gen) gen_alias_equality_fn(left_type ast.Type) string {
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left := g.unwrap(left_type)
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ptr_styp := g.typ(left.typ.set_nr_muls(0))
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if left_type in g.generated_eq_fns {
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return ptr_styp
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}
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g.generated_eq_fns << left_type
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info := left.sym.info as ast.Alias
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g.type_definitions.writeln('static bool ${ptr_styp}_alias_eq($ptr_styp a, $ptr_styp b); // auto')
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mut fn_builder := strings.new_builder(512)
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fn_builder.writeln('static bool ${ptr_styp}_alias_eq($ptr_styp a, $ptr_styp b) {')
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sym := g.table.get_type_symbol(info.parent_type)
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if sym.kind == .string {
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fn_builder.writeln('\treturn string__eq(a, b);')
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} else if sym.kind == .sum_type && !left.typ.is_ptr() {
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eq_fn := g.gen_sumtype_equality_fn(info.parent_type)
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fn_builder.writeln('\treturn ${eq_fn}_sumtype_eq(a, b);')
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} else if sym.kind == .struct_ && !left.typ.is_ptr() {
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eq_fn := g.gen_struct_equality_fn(info.parent_type)
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fn_builder.writeln('\treturn ${eq_fn}_struct_eq(a, b);')
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} else if sym.kind == .array && !left.typ.is_ptr() {
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eq_fn := g.gen_array_equality_fn(info.parent_type)
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fn_builder.writeln('\treturn ${eq_fn}_arr_eq(a, b);')
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} else if sym.kind == .array_fixed && !left.typ.is_ptr() {
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eq_fn := g.gen_fixed_array_equality_fn(info.parent_type)
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fn_builder.writeln('\treturn ${eq_fn}_arr_eq(a, b);')
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} else if sym.kind == .map && !left.typ.is_ptr() {
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eq_fn := g.gen_map_equality_fn(info.parent_type)
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fn_builder.writeln('\treturn ${eq_fn}_map_eq(a, b);')
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} else if sym.kind == .function {
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fn_builder.writeln('\treturn *((voidptr*)(a)) == *((voidptr*)(b));')
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} else {
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fn_builder.writeln('\treturn a == b;')
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}
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fn_builder.writeln('}')
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g.auto_fn_definitions << fn_builder.str()
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return ptr_styp
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}
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fn (mut g Gen) gen_array_equality_fn(left_type ast.Type) string {
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left := g.unwrap(left_type)
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ptr_styp := g.typ(left.typ.set_nr_muls(0))
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if left_type in g.generated_eq_fns {
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return ptr_styp
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}
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g.generated_eq_fns << left_type
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elem := g.unwrap(left.sym.array_info().elem_type)
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ptr_elem_styp := g.typ(elem.typ)
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g.type_definitions.writeln('static bool ${ptr_styp}_arr_eq($ptr_styp a, $ptr_styp b); // auto')
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mut fn_builder := strings.new_builder(512)
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fn_builder.writeln('static bool ${ptr_styp}_arr_eq($ptr_styp a, $ptr_styp b) {')
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fn_builder.writeln('\tif (a.len != b.len) {')
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fn_builder.writeln('\t\treturn false;')
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fn_builder.writeln('\t}')
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fn_builder.writeln('\tfor (int i = 0; i < a.len; ++i) {')
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// compare every pair of elements of the two arrays
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if elem.sym.kind == .string {
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fn_builder.writeln('\t\tif (!string__eq(*(($ptr_elem_styp*)((byte*)a.data+(i*a.element_size))), *(($ptr_elem_styp*)((byte*)b.data+(i*b.element_size))))) {')
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} else if elem.sym.kind == .sum_type && !elem.typ.is_ptr() {
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eq_fn := g.gen_sumtype_equality_fn(elem.typ)
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fn_builder.writeln('\t\tif (!${eq_fn}_sumtype_eq((($ptr_elem_styp*)a.data)[i], (($ptr_elem_styp*)b.data)[i])) {')
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} else if elem.sym.kind == .struct_ && !elem.typ.is_ptr() {
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eq_fn := g.gen_struct_equality_fn(elem.typ)
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fn_builder.writeln('\t\tif (!${eq_fn}_struct_eq((($ptr_elem_styp*)a.data)[i], (($ptr_elem_styp*)b.data)[i])) {')
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} else if elem.sym.kind == .array && !elem.typ.is_ptr() {
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eq_fn := g.gen_array_equality_fn(elem.typ)
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fn_builder.writeln('\t\tif (!${eq_fn}_arr_eq((($ptr_elem_styp*)a.data)[i], (($ptr_elem_styp*)b.data)[i])) {')
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} else if elem.sym.kind == .array_fixed && !elem.typ.is_ptr() {
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eq_fn := g.gen_fixed_array_equality_fn(elem.typ)
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fn_builder.writeln('\t\tif (!${eq_fn}_arr_eq((($ptr_elem_styp*)a.data)[i], (($ptr_elem_styp*)b.data)[i])) {')
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} else if elem.sym.kind == .map && !elem.typ.is_ptr() {
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eq_fn := g.gen_map_equality_fn(elem.typ)
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fn_builder.writeln('\t\tif (!${eq_fn}_map_eq((($ptr_elem_styp*)a.data)[i], (($ptr_elem_styp*)b.data)[i])) {')
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} else if elem.sym.kind == .alias && !elem.typ.is_ptr() {
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eq_fn := g.gen_alias_equality_fn(elem.typ)
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fn_builder.writeln('\t\tif (!${eq_fn}_alias_eq((($ptr_elem_styp*)a.data)[i], (($ptr_elem_styp*)b.data)[i])) {')
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} else if elem.sym.kind == .function {
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fn_builder.writeln('\t\tif (*((voidptr*)((byte*)a.data+(i*a.element_size))) != *((voidptr*)((byte*)b.data+(i*b.element_size)))) {')
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} else {
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fn_builder.writeln('\t\tif (*(($ptr_elem_styp*)((byte*)a.data+(i*a.element_size))) != *(($ptr_elem_styp*)((byte*)b.data+(i*b.element_size)))) {')
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}
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fn_builder.writeln('\t\t\treturn false;')
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fn_builder.writeln('\t\t}')
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fn_builder.writeln('\t}')
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fn_builder.writeln('\treturn true;')
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fn_builder.writeln('}')
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g.auto_fn_definitions << fn_builder.str()
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return ptr_styp
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}
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fn (mut g Gen) gen_fixed_array_equality_fn(left_type ast.Type) string {
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left := g.unwrap(left_type)
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ptr_styp := g.typ(left.typ.set_nr_muls(0))
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if left_type in g.generated_eq_fns {
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return ptr_styp
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}
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g.generated_eq_fns << left_type
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elem_info := left.sym.array_fixed_info()
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elem := g.unwrap(elem_info.elem_type)
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size := elem_info.size
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g.type_definitions.writeln('static bool ${ptr_styp}_arr_eq($ptr_styp a, $ptr_styp b); // auto')
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mut fn_builder := strings.new_builder(512)
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fn_builder.writeln('static bool ${ptr_styp}_arr_eq($ptr_styp a, $ptr_styp b) {')
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fn_builder.writeln('\tfor (int i = 0; i < $size; ++i) {')
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// compare every pair of elements of the two fixed arrays
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if elem.sym.kind == .string {
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fn_builder.writeln('\t\tif (!string__eq(a[i], b[i])) {')
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} else if elem.sym.kind == .sum_type && !elem.typ.is_ptr() {
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eq_fn := g.gen_sumtype_equality_fn(elem.typ)
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fn_builder.writeln('\t\tif (!${eq_fn}_sumtype_eq(a[i], b[i])) {')
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} else if elem.sym.kind == .struct_ && !elem.typ.is_ptr() {
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eq_fn := g.gen_struct_equality_fn(elem.typ)
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fn_builder.writeln('\t\tif (!${eq_fn}_struct_eq(a[i], b[i])) {')
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} else if elem.sym.kind == .array && !elem.typ.is_ptr() {
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eq_fn := g.gen_array_equality_fn(elem.typ)
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fn_builder.writeln('\t\tif (!${eq_fn}_arr_eq(a[i], b[i])) {')
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} else if elem.sym.kind == .array_fixed && !elem.typ.is_ptr() {
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eq_fn := g.gen_fixed_array_equality_fn(elem.typ)
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fn_builder.writeln('\t\tif (!${eq_fn}_arr_eq(a[i], b[i])) {')
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} else if elem.sym.kind == .map && !elem.typ.is_ptr() {
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eq_fn := g.gen_map_equality_fn(elem.typ)
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fn_builder.writeln('\t\tif (!${eq_fn}_map_eq(a[i], b[i])) {')
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} else if elem.sym.kind == .alias && !elem.typ.is_ptr() {
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eq_fn := g.gen_alias_equality_fn(elem.typ)
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fn_builder.writeln('\t\tif (!${eq_fn}_alias_eq(a[i], b[i])) {')
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} else if elem.sym.kind == .function {
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fn_builder.writeln('\t\tif (a[i] != b[i]) {')
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} else {
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fn_builder.writeln('\t\tif (a[i] != b[i]) {')
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}
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fn_builder.writeln('\t\t\treturn false;')
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fn_builder.writeln('\t\t}')
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fn_builder.writeln('\t}')
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fn_builder.writeln('\treturn true;')
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fn_builder.writeln('}')
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g.auto_fn_definitions << fn_builder.str()
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return ptr_styp
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}
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fn (mut g Gen) gen_map_equality_fn(left_type ast.Type) string {
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left := g.unwrap(left_type)
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ptr_styp := g.typ(left.typ.set_nr_muls(0))
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if left_type in g.generated_eq_fns {
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return ptr_styp
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}
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g.generated_eq_fns << left_type
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value := g.unwrap(left.sym.map_info().value_type)
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ptr_value_styp := g.typ(value.typ)
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g.type_definitions.writeln('static bool ${ptr_styp}_map_eq($ptr_styp a, $ptr_styp b); // auto')
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mut fn_builder := strings.new_builder(512)
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fn_builder.writeln('static bool ${ptr_styp}_map_eq($ptr_styp a, $ptr_styp b) {')
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fn_builder.writeln('\tif (a.len != b.len) {')
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fn_builder.writeln('\t\treturn false;')
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fn_builder.writeln('\t}')
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fn_builder.writeln('\tfor (int i = 0; i < a.key_values.len; ++i) {')
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fn_builder.writeln('\t\tif (!DenseArray_has_index(&a.key_values, i)) continue;')
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fn_builder.writeln('\t\tvoidptr k = DenseArray_key(&a.key_values, i);')
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fn_builder.writeln('\t\tif (!map_exists(&b, k)) return false;')
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kind := g.table.type_kind(value.typ)
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if kind == .function {
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func := value.sym.info as ast.FnType
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ret_styp := g.typ(func.func.return_type)
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fn_builder.write_string('\t\t$ret_styp (*v) (')
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arg_len := func.func.params.len
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for j, arg in func.func.params {
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arg_styp := g.typ(arg.typ)
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fn_builder.write_string('$arg_styp $arg.name')
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if j < arg_len - 1 {
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fn_builder.write_string(', ')
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}
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}
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fn_builder.writeln(') = *(voidptr*)map_get(&a, k, &(voidptr[]){ 0 });')
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} else {
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fn_builder.writeln('\t\t$ptr_value_styp v = *($ptr_value_styp*)map_get(&a, k, &($ptr_value_styp[]){ 0 });')
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}
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match kind {
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.string {
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fn_builder.writeln('\t\tif (!fast_string_eq(*(string*)map_get(&b, k, &(string[]){_SLIT("")}), v)) {')
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}
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.sum_type {
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eq_fn := g.gen_sumtype_equality_fn(value.typ)
|
|
fn_builder.writeln('\t\tif (!${eq_fn}_sumtype_eq(*($ptr_value_styp*)map_get(&b, k, &($ptr_value_styp[]){ 0 }), v)) {')
|
|
}
|
|
.struct_ {
|
|
eq_fn := g.gen_struct_equality_fn(value.typ)
|
|
fn_builder.writeln('\t\tif (!${eq_fn}_struct_eq(*($ptr_value_styp*)map_get(&b, k, &($ptr_value_styp[]){ 0 }), v)) {')
|
|
}
|
|
.array {
|
|
eq_fn := g.gen_array_equality_fn(value.typ)
|
|
fn_builder.writeln('\t\tif (!${eq_fn}_arr_eq(*($ptr_value_styp*)map_get(&b, k, &($ptr_value_styp[]){ 0 }), v)) {')
|
|
}
|
|
.array_fixed {
|
|
eq_fn := g.gen_fixed_array_equality_fn(value.typ)
|
|
fn_builder.writeln('\t\tif (!${eq_fn}_arr_eq(*($ptr_value_styp*)map_get(&b, k, &($ptr_value_styp[]){ 0 }), v)) {')
|
|
}
|
|
.map {
|
|
eq_fn := g.gen_map_equality_fn(value.typ)
|
|
fn_builder.writeln('\t\tif (!${eq_fn}_map_eq(*($ptr_value_styp*)map_get(&b, k, &($ptr_value_styp[]){ 0 }), v)) {')
|
|
}
|
|
.alias {
|
|
eq_fn := g.gen_alias_equality_fn(value.typ)
|
|
fn_builder.writeln('\t\tif (!${eq_fn}_alias_eq(*($ptr_value_styp*)map_get(&b, k, &($ptr_value_styp[]){ 0 }), v)) {')
|
|
}
|
|
.function {
|
|
fn_builder.writeln('\t\tif (*(voidptr*)map_get(&b, k, &(voidptr[]){ 0 }) != v) {')
|
|
}
|
|
else {
|
|
fn_builder.writeln('\t\tif (*($ptr_value_styp*)map_get(&b, k, &($ptr_value_styp[]){ 0 }) != v) {')
|
|
}
|
|
}
|
|
fn_builder.writeln('\t\t\treturn false;')
|
|
fn_builder.writeln('\t\t}')
|
|
fn_builder.writeln('\t}')
|
|
fn_builder.writeln('\treturn true;')
|
|
fn_builder.writeln('}')
|
|
g.auto_fn_definitions << fn_builder.str()
|
|
return ptr_styp
|
|
}
|