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v/vlib/compiler/cgen.v

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// Copyright (c) 2019-2020 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.
module compiler
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import (
os
strings
filepath
)
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struct CGen {
out os.File
out_path string
// types []string
thread_fns []string
// buf strings.Builder
is_user bool
mut:
lines []string
lines_extra []string
typedefs []string
type_aliases []string
includes []string
thread_args []string
consts []string
const_defines []string
fns []string
so_fns []string
consts_init []string
pass Pass
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nogen bool
prev_tmps []string
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tmp_line string
cur_line string
prev_line string
is_tmp bool
fn_main string
stash string
file string
line int
line_directives bool
cut_pos int
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}
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fn new_cgen(out_name_c string) &CGen {
path := out_name_c
out := os.create(path)or{
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println('failed to create $path')
return &CGen{
}
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}
gen := &CGen{
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out_path: path
out: out
// buf: strings.new_builder(10000)
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lines: make(0, 1000, sizeof(string))
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}
return gen
}
fn (g mut CGen) genln(s string) {
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if g.nogen || g.pass != .main {
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return
}
if g.is_tmp {
g.tmp_line = '$g.tmp_line $s\n'
return
}
g.cur_line = '$g.cur_line $s'
if g.cur_line != '' {
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if g.line_directives && g.cur_line.trim_space() != '' {
if g.file.len > 0 && g.line > 0 {
g.lines << '\n#line $g.line "$g.file"'
}
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}
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g.lines << g.cur_line
g.prev_line = g.cur_line
g.cur_line = ''
}
}
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// same as `set_placeholder(0, s)`, but faster
fn (g mut CGen) prepend_to_statement(s string) {
if g.is_tmp {
g.tmp_line = s + g.tmp_line
return
}
g.lines << s
g.prev_line = g.cur_line
}
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fn (g mut CGen) gen(s string) {
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if g.nogen || g.pass != .main {
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return
}
if g.is_tmp {
g.tmp_line = '$g.tmp_line $s'
}
else {
g.cur_line = '$g.cur_line $s'
}
}
fn (g mut CGen) resetln(s string) {
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if g.nogen || g.pass != .main {
return
}
if g.is_tmp {
g.tmp_line = s
}
else {
g.cur_line = s
}
}
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fn (g mut CGen) save() {
s := g.lines.join('\n')
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g.out.writeln(s)
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g.out.writeln(g.lines_extra.join('\n'))
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g.out.close()
}
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// returns expression's type, and entire expression's string representation)
fn (p mut Parser) tmp_expr() (string,string) {
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// former start_tmp()
if p.cgen.is_tmp {
p.cgen.prev_tmps << p.cgen.tmp_line
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}
// kg.tmp_lines_pos++
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p.cgen.tmp_line = ''
p.cgen.is_tmp = true
//
typ := p.bool_expression()
res := p.cgen.tmp_line
if p.cgen.prev_tmps.len > 0 {
p.cgen.tmp_line = p.cgen.prev_tmps.last()
p.cgen.prev_tmps = p.cgen.prev_tmps[0..p.cgen.prev_tmps.len - 1]
}
else {
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p.cgen.tmp_line = ''
p.cgen.is_tmp = false
}
return typ,res
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}
fn (g &CGen) add_placeholder() int {
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if g.is_tmp {
return g.tmp_line.len
}
return g.cur_line.len
}
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fn (g mut CGen) start_cut() {
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g.cut_pos = g.add_placeholder()
}
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fn (g mut CGen) cut() string {
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pos := g.cut_pos
g.cut_pos = 0
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if g.is_tmp {
res := g.tmp_line[pos..]
g.tmp_line = g.tmp_line[..pos]
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return res
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}
res := g.cur_line[pos..]
g.cur_line = g.cur_line[..pos]
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return res
}
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fn (g mut CGen) set_placeholder(pos int, val string) {
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if g.nogen || g.pass != .main {
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return
}
// if pos == 0 {
// g.prepend_to_statement(val)
// return
// }
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// g.lines.set(pos, val)
if g.is_tmp {
left := g.tmp_line[..pos]
right := g.tmp_line[pos..]
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g.tmp_line = '${left}${val}${right}'
return
}
left := g.cur_line[..pos]
right := g.cur_line[pos..]
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g.cur_line = '${left}${val}${right}'
// g.genln('')
}
fn (g mut CGen) insert_before(val string) {
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if g.nogen {
return
}
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prev := g.lines[g.lines.len - 1]
g.lines[g.lines.len - 1] = '$prev \n $val \n'
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}
fn (g mut CGen) register_thread_fn(wrapper_name, wrapper_text, struct_text string) {
for arg in g.thread_args {
if arg.contains(wrapper_name) {
return
}
}
g.thread_args << struct_text
g.thread_args << wrapper_text
}
fn (v &V) prof_counters() string {
res := []string
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// Global fns
// for f in c.table.fns {
// res << 'double ${c.table.cgen_name(f)}_time;'
// }
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// Methods
/*
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for typ in c.table.types {
// println('')
for f in typ.methods {
// res << f.cgen_name()
res << 'double ${c.table.cgen_name(f)}_time;'
// println(f.cgen_name())
}
}
*/
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return res.join(';\n')
}
fn (p &Parser) print_prof_counters() string {
res := []string
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// Global fns
// for f in p.table.fns {
// counter := '${p.table.cgen_name(f)}_time'
// res << 'if ($counter) printf("%%f : $f.name \\n", $counter);'
// }
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// Methods
/*
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for typ in p.table.types {
// println('')
for f in typ.methods {
counter := '${p.table.cgen_name(f)}_time'
res << 'if ($counter) printf("%%f : ${p.table.cgen_name(f)} \\n", $counter);'
// res << 'if ($counter) printf("$f.name : %%f\\n", $counter);'
// res << f.cgen_name()
// res << 'double ${f.cgen_name()}_time;'
// println(f.cgen_name())
}
}
*/
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return res.join(';\n')
}
fn (p mut Parser) gen_typedef(s string) {
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if !p.first_pass() {
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return
}
p.cgen.typedefs << s
}
fn (p mut Parser) gen_type_alias(s string) {
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if !p.first_pass() {
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return
}
p.cgen.type_aliases << s
}
fn (g mut CGen) add_to_main(s string) {
g.fn_main = g.fn_main + s
}
fn build_thirdparty_obj_file(path string, moduleflags []CFlag) {
obj_path := os.realpath(path)
if os.exists(obj_path) {
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return
}
println('$obj_path not found, building it...')
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parent := filepath.dir(obj_path)
files := os.ls(parent)or{
panic(err)
}
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mut cfiles := ''
for file in files {
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if file.ends_with('.c') {
cfiles += '"' + os.realpath(parent + os.path_separator + file) + '" '
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}
}
cc := find_c_compiler()
cc_thirdparty_options := find_c_compiler_thirdparty_options()
btarget := moduleflags.c_options_before_target()
atarget := moduleflags.c_options_after_target()
cmd := '$cc $cc_thirdparty_options $btarget -c -o "$obj_path" $cfiles $atarget '
res := os.exec(cmd)or{
println('failed thirdparty object build cmd: $cmd')
verror(err)
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return
}
if res.exit_code != 0 {
println('failed thirdparty object build cmd: $cmd')
verror(res.output)
return
}
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println(res.output)
}
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fn os_name_to_ifdef(name string) string {
match name {
'windows' {
return '_WIN32'
}
'mac' {
return '__APPLE__'
}
'macos' {
return '__APPLE__'
}
'linux' {
return '__linux__'
}
'freebsd' {
return '__FreeBSD__'
}
'openbsd' {
return '__OpenBSD__'
}
'netbsd' {
return '__NetBSD__'
}
'dragonfly' {
return '__DragonFly__'
}
'msvc' {
return '_MSC_VER'
}
'android' {
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return '__ANDROID__'
}
'js' {
return '_VJS'
}
'solaris' {
return '__sun'
}
'haiku' {
return '__haiku__'
}
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'linux_or_macos' {
return ''
}
else {
verror('bad os ifdef name "$name"')
}}
// verror('bad os ifdef name "$name"')
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return ''
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}
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fn (v &V) platform_postfix_to_ifdefguard(name string) string {
if name.starts_with('custom '){
cdefine := name.replace('custom ','')
return '#ifdef CUSTOM_DEFINE_${cdefine}'
}
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s := match name {
'.v'{
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''
} // no guard needed
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'_win.v', '_windows.v'{
'#ifdef _WIN32'
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}
'_nix.v'{
'#ifndef _WIN32'
}
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'_lin.v', '_linux.v'{
'#ifdef __linux__'
}
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'_mac.v', '_darwin.v'{
'#ifdef __APPLE__'
}
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'_bsd.v', '_freebsd.v '{
'#ifdef __FreeBSD__'
}
'_solaris.v'{
'#ifdef __sun'
}
'_haiku.v'{
'#ifdef __haiku__'
}
else {
// verror('bad platform_postfix "$name"')
// TODO
''}}
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if s == '' {
verror('bad platform_postfix "$name"')
}
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return s
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}
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// C struct definitions, ordered
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// Sort the types, make sure types that are referenced by other types
// are added before them.
fn (v &V) type_definitions() string {
mut types := []Type // structs that need to be sorted
mut builtin_types := []Type // builtin types
// builtin types need to be on top
builtins := ['string', 'array', 'map', 'Option']
for builtin in builtins {
typ := v.table.typesmap[builtin]
builtin_types << typ
}
// everything except builtin will get sorted
for t_name, t in v.table.typesmap {
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if t_name in builtins || t.is_generic {
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continue
}
types << t
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}
// sort structs
types_sorted := sort_structs(types)
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// Generate C code
res := types_to_c(builtin_types, v.table) + '\n//----\n' + types_to_c(types_sorted, v.table)
return res
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}
// sort structs by dependant fields
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fn sort_structs(types []Type) []Type {
mut dep_graph := new_dep_graph()
// types name list
mut type_names := []string
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for typ in types {
type_names << typ.name
}
// loop over types
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for t in types {
// create list of deps
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mut field_deps := []string
for field in t.fields {
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// Need to handle fixed size arrays as well (`[10]Point`)
ft := if field.typ.starts_with('[') { field.typ.all_after(']') } else { field.typ }
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// skip if not in types list or already in deps
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if !(ft in type_names) || ft in field_deps {
continue
}
field_deps << ft // field.typ
}
// add type and dependant types to graph
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dep_graph.add(t.name, field_deps)
}
// sort graph
dep_graph_sorted := dep_graph.resolve()
if !dep_graph_sorted.acyclic {
verror('cgen.sort_structs(): the following structs form a dependency cycle:\n' + dep_graph_sorted.display_cycles() + '\nyou can solve this by making one or both of the dependant struct fields references, eg: field &MyStruct' + '\nif you feel this is an error, please create a new issue here: https://github.com/vlang/v/issues and tag @joe-conigliaro')
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}
// sort types
mut types_sorted := []Type
for node in dep_graph_sorted.nodes {
for t in types {
if t.name == node.name {
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types_sorted << t
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continue
}
}
}
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return types_sorted
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}
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// Generates interface table and interface indexes
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fn (v &V) interface_table() string {
mut sb := strings.new_builder(100)
for _, t in v.table.typesmap {
if t.cat != .interface_ {
continue
}
interface_name := t.name
mut methods := ''
sb.writeln('// NR methods = $t.gen_types.len')
for i, gen_type in t.gen_types {
gen_concrete_type_name := gen_type.replace('*', '')
methods += '{\n'
for j, method in t.methods {
// Cat_speak
methods += ' (void*) ${gen_concrete_type_name}_${method.name}'
if j < t.methods.len - 1 {
methods += ', \n'
}
}
methods += '\n},\n\n'
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// Speaker_Cat_index = 0
concrete_type_name := gen_type.replace('*', '_ptr')
sb.writeln('int _${interface_name}_${concrete_type_name}_index = $i;')
}
if t.gen_types.len > 0 {
// methods = '{TCCSKIP(0)}'
// }
sb.writeln('void* (* ${interface_name}_name_table[][$t.methods.len]) = ' + '{ \n $methods \n }; ')
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}
else {
// The line below is needed so that C compilation succeeds,
// even if no interface methods are called.
// See https://github.com/zenith391/vgtk3/issues/7
sb.writeln('void* (* ${interface_name}_name_table[][1]) = ' + '{ {NULL} }; ')
}
continue
}
return sb.str()
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}