736 lines
19 KiB
V
736 lines
19 KiB
V
// Copyright (c) 2019-2022 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module c
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import os
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import v.ast
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import v.util
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import v.pref
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fn (mut g Gen) comptime_selector(node ast.ComptimeSelector) {
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g.expr(node.left)
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if node.left_type.is_ptr() {
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g.write('->')
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} else {
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g.write('.')
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}
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// check for field.name
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if node.field_expr is ast.SelectorExpr {
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if node.field_expr.expr is ast.Ident {
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if node.field_expr.expr.name == g.comptime_for_field_var
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&& node.field_expr.field_name == 'name' {
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field_name := g.comptime_for_field_value.name
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left_sym := g.table.sym(g.unwrap_generic(node.left_type))
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_ := g.table.find_field_with_embeds(left_sym, field_name) or {
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g.error('`$node.left` has no field named `$field_name`', node.left.pos())
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}
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g.write(c_name(field_name))
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return
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}
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}
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}
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g.expr(node.field_expr)
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}
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fn (mut g Gen) comptime_call(mut node ast.ComptimeCall) {
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if node.is_embed {
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// $embed_file('/path/to/file')
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g.gen_embed_file_init(mut node)
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return
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}
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if node.method_name == 'env' {
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// $env('ENV_VAR_NAME')
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val := util.cescaped_path(os.getenv(node.args_var))
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g.write('_SLIT("$val")')
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return
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}
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if node.is_vweb {
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is_html := node.method_name == 'html'
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mut cur_line := ''
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if !is_html {
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cur_line = g.go_before_stmt(0)
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}
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for stmt in node.vweb_tmpl.stmts {
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if stmt is ast.FnDecl {
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// insert stmts from vweb_tmpl fn
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if stmt.name.starts_with('main.vweb_tmpl') {
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if is_html {
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g.inside_vweb_tmpl = true
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}
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g.stmts(stmt.stmts.filter(it !is ast.Return))
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g.inside_vweb_tmpl = false
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break
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}
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}
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}
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fn_name := g.fn_decl.name.replace('.', '__') + node.pos.pos.str()
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if is_html {
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// return vweb html template
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g.writeln('vweb__Context_html(&app->Context, _tmpl_res_$fn_name); strings__Builder_free(&sb_$fn_name); string_free(&_tmpl_res_$fn_name);')
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} else {
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// return $tmpl string
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g.write(cur_line)
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if g.inside_return {
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g.write('return ')
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}
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g.write('_tmpl_res_$fn_name')
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}
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return
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}
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sym := g.table.sym(g.unwrap_generic(node.left_type))
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g.trace_autofree('// \$method call. sym="$sym.name"')
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if node.method_name == 'method' {
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// `app.$method()`
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m := sym.find_method(g.comptime_for_method) or { return }
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/*
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vals := m.attrs[0].split('/')
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args := vals.filter(it.starts_with(':')).map(it[1..])
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println(vals)
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for val in vals {
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}
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*/
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expand_strs := if node.args.len > 0 && m.params.len - 1 >= node.args.len {
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arg := node.args[node.args.len - 1]
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param := m.params[node.args.len]
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arg.expr is ast.Ident && g.table.type_to_str(arg.typ) == '[]string'
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&& g.table.type_to_str(param.typ) != '[]string'
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} else {
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false
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}
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// check argument length and types
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if m.params.len - 1 != node.args.len && !expand_strs {
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if g.inside_call {
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g.error('expected ${m.params.len - 1} arguments to method ${sym.name}.$m.name, but got $node.args.len',
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node.pos)
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} else {
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// do not generate anything if the argument lengths don't match
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g.writeln('/* skipping ${sym.name}.$m.name due to mismatched arguments list */')
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// g.writeln('println(_SLIT("skipping ${node.sym.name}.$m.name due to mismatched arguments list"));')
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// eprintln('info: skipping ${node.sym.name}.$m.name due to mismatched arguments list\n' +
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//'method.params: $m.params, args: $node.args\n\n')
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// verror('expected ${m.params.len-1} arguments to method ${node.sym.name}.$m.name, but got $node.args.len')
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}
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return
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}
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// TODO: check argument types
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g.write('${util.no_dots(sym.name)}_${g.comptime_for_method}(')
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// try to see if we need to pass a pointer
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if node.left is ast.Ident {
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if node.left.obj is ast.Var {
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if m.params[0].typ.is_ptr() && !node.left.obj.typ.is_ptr() {
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g.write('&')
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}
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}
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}
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g.expr(node.left)
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if m.params.len > 1 {
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g.write(', ')
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}
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for i in 1 .. m.params.len {
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if node.left is ast.Ident {
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if m.params[i].name == node.left.name {
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continue
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}
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}
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if i - 1 < node.args.len - 1 {
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g.expr(node.args[i - 1].expr)
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g.write(', ')
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} else if !expand_strs && i == node.args.len {
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g.expr(node.args[i - 1].expr)
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break
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} else {
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// last argument; try to expand if it's []string
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idx := i - node.args.len
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if m.params[i].typ.is_int() || m.params[i].typ.idx() == ast.bool_type_idx {
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// Gets the type name and cast the string to the type with the string_<type> function
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type_name := g.table.type_symbols[int(m.params[i].typ)].str()
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g.write('string_${type_name}(((string*)${node.args[node.args.len - 1]}.data) [$idx])')
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} else {
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g.write('((string*)${node.args[node.args.len - 1]}.data) [$idx] ')
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}
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if i < m.params.len - 1 {
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g.write(', ')
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}
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}
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}
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if g.inside_call {
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g.write(')')
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} else {
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g.write(');')
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}
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return
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}
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mut j := 0
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for method in sym.methods {
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// if method.return_type != ast.void_type {
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if method.return_type != node.result_type {
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continue
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}
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if method.params.len != 1 {
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continue
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}
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// receiver := method.args[0]
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// if !p.expr_var.ptr {
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// p.error('`$p.expr_var.name` needs to be a reference')
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// }
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amp := '' // if receiver.is_mut && !p.expr_var.ptr { '&' } else { '' }
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if node.is_vweb {
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if j > 0 {
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g.write(' else ')
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}
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g.write('if (string__eq($node.method_name, _SLIT("$method.name"))) ')
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}
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g.write('${util.no_dots(sym.name)}_${method.name}($amp ')
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g.expr(node.left)
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g.writeln(');')
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j++
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}
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}
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fn cgen_attrs(attrs []ast.Attr) []string {
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mut res := []string{cap: attrs.len}
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for attr in attrs {
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// we currently don't quote 'arg' (otherwise we could just use `s := attr.str()`)
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mut s := attr.name
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if attr.arg.len > 0 {
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s += ': $attr.arg'
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}
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res << '_SLIT("$s")'
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}
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return res
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}
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fn (mut g Gen) comptime_at(node ast.AtExpr) {
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if node.kind == .vmod_file {
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val := cescape_nonascii(util.smart_quote(node.val, false))
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g.write('_SLIT("$val")')
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} else {
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val := node.val.replace('\\', '\\\\')
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g.write('_SLIT("$val")')
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}
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}
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fn (mut g Gen) comptime_if(node ast.IfExpr) {
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if !node.is_expr && !node.has_else && node.branches.len == 1 {
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if node.branches[0].stmts.len == 0 {
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// empty ifdef; result of target OS != conditional => skip
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return
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}
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if !g.pref.output_cross_c {
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if node.branches[0].cond is ast.Ident {
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if g.pref.os == (pref.os_from_string(node.branches[0].cond.name) or {
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pref.OS._auto
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}) {
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// Same target OS as the conditional...
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// => skip the #if defined ... #endif wrapper
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// and just generate the branch statements:
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g.indent--
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g.stmts(node.branches[0].stmts)
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g.indent++
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return
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}
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}
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}
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}
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line := if node.is_expr {
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stmt_str := g.go_before_stmt(0)
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g.write(util.tabs(g.indent))
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stmt_str.trim_space()
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} else {
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''
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}
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mut comptime_if_stmts_skip := false // don't write any statements if the condition is false
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// (so that for example windows calls don't get generated inside `$if macos` which
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// will lead to compilation errors)
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for i, branch in node.branches {
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start_pos := g.out.len
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if i == node.branches.len - 1 && node.has_else {
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g.writeln('#else')
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comptime_if_stmts_skip = false
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} else {
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if i == 0 {
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g.write('#if ')
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} else {
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g.write('#elif ')
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}
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comptime_if_stmts_skip = !g.comptime_if_cond(branch.cond, branch.pkg_exist)
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g.writeln('')
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}
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expr_str := g.out.last_n(g.out.len - start_pos).trim_space()
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g.defer_ifdef = expr_str
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if node.is_expr {
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len := branch.stmts.len
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if len > 0 {
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last := branch.stmts.last() as ast.ExprStmt
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if len > 1 {
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tmp := g.new_tmp_var()
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styp := g.typ(last.typ)
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g.indent++
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g.writeln('$styp $tmp;')
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g.writeln('{')
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g.stmts(branch.stmts[..len - 1])
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g.write('\t$tmp = ')
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g.stmt(last)
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g.writeln('}')
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g.indent--
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g.writeln('$line $tmp;')
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} else {
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g.write('$line ')
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g.stmt(last)
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}
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}
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} else {
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// Only wrap the contents in {} if we're inside a function, not on the top level scope
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should_create_scope := unsafe { g.fn_decl != 0 }
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if should_create_scope {
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g.writeln('{')
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}
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if !comptime_if_stmts_skip {
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g.stmts(branch.stmts)
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}
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if should_create_scope {
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g.writeln('}')
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}
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}
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g.defer_ifdef = ''
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}
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g.writeln('#endif')
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}
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// returns the value of the bool comptime expression
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// returning `false` means the statements inside the $if can be skipped
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fn (mut g Gen) comptime_if_cond(cond ast.Expr, pkg_exist bool) bool {
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match cond {
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ast.BoolLiteral {
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g.expr(cond)
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return true
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}
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ast.ParExpr {
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g.write('(')
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is_cond_true := g.comptime_if_cond(cond.expr, pkg_exist)
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g.write(')')
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return is_cond_true
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}
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ast.PrefixExpr {
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g.write(cond.op.str())
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return g.comptime_if_cond(cond.right, pkg_exist)
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}
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ast.PostfixExpr {
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ifdef := g.comptime_if_to_ifdef((cond.expr as ast.Ident).name, true) or {
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verror(err.msg())
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return false
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}
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g.write('defined($ifdef)')
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return true
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}
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ast.InfixExpr {
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match cond.op {
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.and, .logical_or {
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l := g.comptime_if_cond(cond.left, pkg_exist)
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g.write(' $cond.op ')
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r := g.comptime_if_cond(cond.right, pkg_exist)
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return if cond.op == .and { l && r } else { l || r }
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}
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.key_is, .not_is {
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left := cond.left
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mut name := ''
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if left is ast.TypeNode && cond.right is ast.ComptimeType {
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checked_type := g.unwrap_generic(left.typ)
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is_true := g.table.is_comptime_type(checked_type, cond.right)
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if cond.op == .key_is {
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if is_true {
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g.write('1')
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} else {
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g.write('0')
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}
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return is_true
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} else {
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if is_true {
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g.write('0')
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} else {
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g.write('1')
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}
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return !is_true
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}
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}
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mut exp_type := ast.Type(0)
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got_type := (cond.right as ast.TypeNode).typ
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// Handle `$if x is Interface {`
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// mut matches_interface := 'false'
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if left is ast.TypeNode && cond.right is ast.TypeNode
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&& g.table.sym(got_type).kind == .interface_ {
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// `$if Foo is Interface {`
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interface_sym := g.table.sym(got_type)
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if interface_sym.info is ast.Interface {
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// q := g.table.sym(interface_sym.info.types[0])
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checked_type := g.unwrap_generic(left.typ)
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// TODO PERF this check is run twice (also in the checker)
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// store the result in a field
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is_true := g.table.does_type_implement_interface(checked_type,
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got_type)
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// true // exp_type in interface_sym.info.types
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if cond.op == .key_is {
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if is_true {
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g.write('1')
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} else {
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g.write('0')
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}
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return is_true
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} else if cond.op == .not_is {
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if is_true {
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g.write('0')
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} else {
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g.write('1')
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}
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return !is_true
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}
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// matches_interface = '/*iface:$got_type $exp_type*/ true'
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//}
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}
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} else if left is ast.SelectorExpr {
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if left.gkind_field == .typ {
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exp_type = g.unwrap_generic(left.name_type)
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} else {
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name = '${left.expr}.$left.field_name'
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exp_type = g.comptime_var_type_map[name]
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}
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} else if left is ast.TypeNode {
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// this is only allowed for generics currently, otherwise blocked by checker
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exp_type = g.unwrap_generic(left.typ)
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}
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if cond.op == .key_is {
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g.write('$exp_type.idx() == $got_type.idx()')
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return exp_type == got_type
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} else {
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g.write('$exp_type.idx() != $got_type.idx()')
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return exp_type != got_type
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}
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}
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.eq, .ne {
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// TODO Implement `$if method.args.len == 1`
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g.write('1')
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return true
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}
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else {
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return true
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}
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}
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}
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ast.Ident {
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ifdef := g.comptime_if_to_ifdef(cond.name, false) or { 'true' } // handled in checker
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g.write('defined($ifdef)')
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return true
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}
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ast.ComptimeCall {
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g.write('$pkg_exist')
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return true
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}
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else {
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// should be unreachable, but just in case
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g.write('1')
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return true
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}
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}
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}
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fn (mut g Gen) comptime_for(node ast.ComptimeFor) {
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sym := g.table.sym(g.unwrap_generic(node.typ))
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g.writeln('/* \$for $node.val_var in ${sym.name}($node.kind.str()) */ {')
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g.indent++
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// vweb_result_type := ast.new_type(g.table.find_type_idx('vweb.Result'))
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mut i := 0
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// g.writeln('string method = _SLIT("");')
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if node.kind == .methods {
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mut methods := sym.methods.filter(it.attrs.len == 0) // methods without attrs first
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methods_with_attrs := sym.methods.filter(it.attrs.len > 0) // methods with attrs second
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methods << methods_with_attrs
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if methods.len > 0 {
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g.writeln('FunctionData $node.val_var = {0};')
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}
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for method in methods { // sym.methods {
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/*
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if method.return_type != vweb_result_type { // ast.void_type {
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continue
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}
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*/
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g.comptime_for_method = method.name
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g.writeln('/* method $i */ {')
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g.writeln('\t${node.val_var}.name = _SLIT("$method.name");')
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if method.attrs.len == 0 {
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g.writeln('\t${node.val_var}.attrs = __new_array_with_default(0, 0, sizeof(string), 0);')
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} else {
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attrs := cgen_attrs(method.attrs)
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g.writeln(
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'\t${node.val_var}.attrs = new_array_from_c_array($attrs.len, $attrs.len, sizeof(string), _MOV((string[$attrs.len]){' +
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attrs.join(', ') + '}));\n')
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}
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if method.params.len < 2 {
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// 0 or 1 (the receiver) args
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g.writeln('\t${node.val_var}.args = __new_array_with_default(0, 0, sizeof(MethodArgs), 0);')
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} else {
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len := method.params.len - 1
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g.write('\t${node.val_var}.args = new_array_from_c_array($len, $len, sizeof(MethodArgs), _MOV((MethodArgs[$len]){')
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// Skip receiver arg
|
|
for j, arg in method.params[1..] {
|
|
typ := arg.typ.idx()
|
|
g.write('{$typ.str(), _SLIT("$arg.name")}')
|
|
if j < len - 1 {
|
|
g.write(', ')
|
|
}
|
|
g.comptime_var_type_map['${node.val_var}.args[$j].typ'] = typ
|
|
}
|
|
g.writeln('}));\n')
|
|
}
|
|
mut sig := 'anon_fn_'
|
|
// skip the first (receiver) arg
|
|
for j, arg in method.params[1..] {
|
|
// TODO: ignore mut/pts in sig for now
|
|
typ := arg.typ.set_nr_muls(0)
|
|
sig += '$typ'
|
|
if j < method.params.len - 2 {
|
|
sig += '_'
|
|
}
|
|
}
|
|
sig += '_$method.return_type'
|
|
styp := g.table.find_type_idx(sig)
|
|
// println(styp)
|
|
// if styp == 0 { }
|
|
// TODO: type aliases
|
|
ret_typ := method.return_type.idx()
|
|
g.writeln('\t${node.val_var}.typ = $styp;')
|
|
g.writeln('\t${node.val_var}.return_type = $ret_typ;')
|
|
//
|
|
g.comptime_var_type_map['${node.val_var}.return_type'] = ret_typ
|
|
g.comptime_var_type_map['${node.val_var}.typ'] = styp
|
|
g.stmts(node.stmts)
|
|
i++
|
|
g.writeln('}')
|
|
//
|
|
mut delete_keys := []string{}
|
|
for key, _ in g.comptime_var_type_map {
|
|
if key.starts_with(node.val_var) {
|
|
delete_keys << key
|
|
}
|
|
}
|
|
for key in delete_keys {
|
|
g.comptime_var_type_map.delete(key)
|
|
}
|
|
}
|
|
} else if node.kind == .fields {
|
|
// TODO add fields
|
|
if sym.kind == .struct_ {
|
|
sym_info := sym.info as ast.Struct
|
|
if sym_info.fields.len > 0 {
|
|
g.writeln('\tFieldData $node.val_var = {0};')
|
|
}
|
|
g.inside_comptime_for_field = true
|
|
for field in sym_info.fields {
|
|
g.comptime_for_field_var = node.val_var
|
|
g.comptime_for_field_value = field
|
|
g.comptime_for_field_type = field.typ
|
|
g.writeln('/* field $i */ {')
|
|
g.writeln('\t${node.val_var}.name = _SLIT("$field.name");')
|
|
if field.attrs.len == 0 {
|
|
g.writeln('\t${node.val_var}.attrs = __new_array_with_default(0, 0, sizeof(string), 0);')
|
|
} else {
|
|
attrs := cgen_attrs(field.attrs)
|
|
g.writeln(
|
|
'\t${node.val_var}.attrs = new_array_from_c_array($attrs.len, $attrs.len, sizeof(string), _MOV((string[$attrs.len]){' +
|
|
attrs.join(', ') + '}));\n')
|
|
}
|
|
// field_sym := g.table.sym(field.typ)
|
|
// g.writeln('\t${node.val_var}.typ = _SLIT("$field_sym.name");')
|
|
styp := field.typ
|
|
g.writeln('\t${node.val_var}.typ = $styp.idx();')
|
|
g.writeln('\t${node.val_var}.is_pub = $field.is_pub;')
|
|
g.writeln('\t${node.val_var}.is_mut = $field.is_mut;')
|
|
g.writeln('\t${node.val_var}.is_shared = ${field.typ.has_flag(.shared_f)};')
|
|
g.comptime_var_type_map['${node.val_var}.typ'] = styp
|
|
g.stmts(node.stmts)
|
|
i++
|
|
g.writeln('}')
|
|
g.comptime_for_field_type = 0
|
|
}
|
|
g.inside_comptime_for_field = false
|
|
g.comptime_var_type_map.delete(node.val_var)
|
|
}
|
|
} else if node.kind == .attributes {
|
|
if sym.info is ast.Struct {
|
|
if sym.info.attrs.len > 0 {
|
|
g.writeln('\tStructAttribute $node.val_var = {0};')
|
|
}
|
|
for attr in sym.info.attrs {
|
|
g.writeln('/* attribute $i */ {')
|
|
g.writeln('\t${node.val_var}.name = _SLIT("$attr.name");')
|
|
g.writeln('\t${node.val_var}.has_arg = $attr.has_arg;')
|
|
g.writeln('\t${node.val_var}.arg = _SLIT("$attr.arg");')
|
|
g.writeln('\t${node.val_var}.kind = AttributeKind__$attr.kind;')
|
|
g.stmts(node.stmts)
|
|
g.writeln('}')
|
|
}
|
|
}
|
|
}
|
|
g.indent--
|
|
g.writeln('}// \$for')
|
|
}
|
|
|
|
fn (mut g Gen) comptime_if_to_ifdef(name string, is_comptime_optional bool) ?string {
|
|
match name {
|
|
// platforms/os-es:
|
|
'windows' {
|
|
return '_WIN32'
|
|
}
|
|
'ios' {
|
|
return '__TARGET_IOS__'
|
|
}
|
|
'macos' {
|
|
return '__APPLE__'
|
|
}
|
|
'mach' {
|
|
return '__MACH__'
|
|
}
|
|
'darwin' {
|
|
return '__DARWIN__'
|
|
}
|
|
'hpux' {
|
|
return '__HPUX__'
|
|
}
|
|
'gnu' {
|
|
return '__GNU__'
|
|
}
|
|
'qnx' {
|
|
return '__QNX__'
|
|
}
|
|
'linux' {
|
|
return '__linux__'
|
|
}
|
|
'serenity' {
|
|
return '__serenity__'
|
|
}
|
|
'vinix' {
|
|
return '__vinix__'
|
|
}
|
|
'freebsd' {
|
|
return '__FreeBSD__'
|
|
}
|
|
'openbsd' {
|
|
return '__OpenBSD__'
|
|
}
|
|
'netbsd' {
|
|
return '__NetBSD__'
|
|
}
|
|
'bsd' {
|
|
return '__BSD__'
|
|
}
|
|
'dragonfly' {
|
|
return '__DragonFly__'
|
|
}
|
|
'android' {
|
|
return '__ANDROID__'
|
|
}
|
|
'solaris' {
|
|
return '__sun'
|
|
}
|
|
'haiku' {
|
|
return '__HAIKU__'
|
|
}
|
|
//
|
|
'js' {
|
|
return '_VJS'
|
|
}
|
|
// compilers:
|
|
'gcc' {
|
|
return '__V_GCC__'
|
|
}
|
|
'tinyc' {
|
|
return '__TINYC__'
|
|
}
|
|
'clang' {
|
|
return '__clang__'
|
|
}
|
|
'mingw' {
|
|
return '__MINGW32__'
|
|
}
|
|
'msvc' {
|
|
return '_MSC_VER'
|
|
}
|
|
'cplusplus' {
|
|
return '__cplusplus'
|
|
}
|
|
// other:
|
|
'threads' {
|
|
return '__VTHREADS__'
|
|
}
|
|
'gcboehm' {
|
|
return '_VGCBOEHM'
|
|
}
|
|
'debug' {
|
|
return '_VDEBUG'
|
|
}
|
|
'prod' {
|
|
return '_VPROD'
|
|
}
|
|
'profile' {
|
|
return '_VPROFILE'
|
|
}
|
|
'test' {
|
|
return '_VTEST'
|
|
}
|
|
'glibc' {
|
|
return '__GLIBC__'
|
|
}
|
|
'prealloc' {
|
|
return '_VPREALLOC'
|
|
}
|
|
'no_bounds_checking' {
|
|
return 'CUSTOM_DEFINE_no_bounds_checking'
|
|
}
|
|
'freestanding' {
|
|
return '_VFREESTANDING'
|
|
}
|
|
// architectures:
|
|
'amd64' {
|
|
return '__V_amd64'
|
|
}
|
|
'aarch64', 'arm64' {
|
|
return '__V_arm64'
|
|
}
|
|
'arm32' {
|
|
return '__V_arm32'
|
|
}
|
|
'i386' {
|
|
return '__V_x86'
|
|
}
|
|
// bitness:
|
|
'x64' {
|
|
return 'TARGET_IS_64BIT'
|
|
}
|
|
'x32' {
|
|
return 'TARGET_IS_32BIT'
|
|
}
|
|
// endianness:
|
|
'little_endian' {
|
|
return 'TARGET_ORDER_IS_LITTLE'
|
|
}
|
|
'big_endian' {
|
|
return 'TARGET_ORDER_IS_BIG'
|
|
}
|
|
else {
|
|
if is_comptime_optional
|
|
|| (g.pref.compile_defines_all.len > 0 && name in g.pref.compile_defines_all) {
|
|
return 'CUSTOM_DEFINE_$name'
|
|
}
|
|
return error('bad os ifdef name "$name"') // should never happen, caught in the checker
|
|
}
|
|
}
|
|
return none
|
|
}
|