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v/vlib/builtin/builtin.v
2020-01-23 21:04:46 +01:00

216 lines
4.3 KiB
V

// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module builtin
__global g_m2_buf byteptr
__global g_m2_ptr byteptr
fn init() {
$if windows {
if is_atty(1) > 0 {
C.SetConsoleMode(C.GetStdHandle(C.STD_OUTPUT_HANDLE), C.ENABLE_PROCESSED_OUTPUT | 0x0004) // ENABLE_VIRTUAL_TERMINAL_PROCESSING
C.setbuf(C.stdout, 0)
}
}
}
pub fn exit(code int) {
C.exit(code)
}
// isnil returns true if an object is nil (only for C objects).
pub fn isnil(v voidptr) bool {
return v == 0
}
fn on_panic(f fn(int)int) {
// TODO
}
pub fn print_backtrace_skipping_top_frames(skipframes int) {
$if windows {
$if msvc {
if print_backtrace_skipping_top_frames_msvc(skipframes) {
return
}
}
$if mingw {
if print_backtrace_skipping_top_frames_mingw(skipframes) {
return
}
}
} $else {
if print_backtrace_skipping_top_frames_nix(skipframes) {
return
}
}
println('print_backtrace_skipping_top_frames is not implemented on this platform for now...\n')
}
pub fn print_backtrace() {
// at the time of backtrace_symbols_fd call, the C stack would look something like this:
// 1 frame for print_backtrace_skipping_top_frames
// 1 frame for print_backtrace itself
// ... print the rest of the backtrace frames ...
// => top 2 frames should be skipped, since they will not be informative to the developer
print_backtrace_skipping_top_frames(2)
}
// replaces panic when -debug arg is passed
fn panic_debug(line_no int, file, mod, fn_name, s string) {
println('================ V panic ================')
println(' module: $mod')
println(' function: ${fn_name}()')
println(' file: $file')
println(' line: ' + line_no.str())
println(' message: $s')
println('=========================================')
print_backtrace_skipping_top_frames(1)
C.exit(1)
}
pub fn panic(s string) {
println('V panic: $s')
print_backtrace()
C.exit(1)
}
pub fn eprintln(s string) {
if isnil(s.str) {
panic('eprintln(NIL)')
}
$if !windows {
C.fflush(stdout)
C.fflush(stderr)
C.fprintf(stderr, '%.*s\n', s.len, s.str)
C.fflush(stderr)
return
}
// TODO issues with stderr and cross compiling for Linux
println(s)
}
pub fn eprint(s string) {
if isnil(s.str) {
panic('eprint(NIL)')
}
$if !windows {
C.fflush(stdout)
C.fflush(stderr)
C.fprintf(stderr, '%.*s', s.len, s.str)
C.fflush(stderr)
return
}
print(s)
}
pub fn print(s string) {
$if windows {
output_handle := C.GetStdHandle(C.STD_OUTPUT_HANDLE)
mut bytes_written := 0
if is_atty(1) > 0 {
wide_str := s.to_wide()
wide_len := C.wcslen(wide_str)
C.WriteConsole(output_handle, wide_str, wide_len, &bytes_written, 0)
} else {
C.WriteFile(output_handle, s.str, s.len, &bytes_written, 0)
}
} $else {
C.printf('%.*s', s.len, s.str)
}
}
__global total_m i64=0
__global nr_mallocs int=0
[unsafe_fn]
pub fn malloc(n int) byteptr {
if n <= 0 {
panic('malloc(<=0)')
}
$if prealloc {
res := g_m2_ptr
g_m2_ptr += n
nr_mallocs++
return res
} $else {
ptr := C.malloc(n)
if ptr == 0 {
panic('malloc($n) failed')
}
return ptr
}
/*
TODO
#ifdef VPLAY
if n > 10000 {
panic('allocating more than 10 KB is not allowed in the playground')
}
#endif
#ifdef DEBUG_ALLOC
total_m += n
println('\n\n\nmalloc($n) total=$total_m')
print_backtrace()
#endif
*/
}
pub fn calloc(n int) byteptr {
if n <= 0 {
panic('calloc(<=0)')
}
return C.calloc(n, 1)
}
[unsafe_fn]
pub fn free(ptr voidptr) {
C.free(ptr)
}
pub fn memdup(src voidptr, sz int) voidptr {
mem := malloc(sz)
return C.memcpy(mem, src, sz)
}
fn v_ptr_free(ptr voidptr) {
C.free(ptr)
}
pub fn is_atty(fd int) int {
$if windows {
mut mode := u32(0)
osfh := voidptr(C._get_osfhandle(fd))
C.GetConsoleMode(osfh, voidptr(&mode))
return int(mode)
} $else {
return C.isatty(fd)
}
}
/*
fn C.va_start()
fn C.va_end()
fn C.vsnprintf() int
fn C.vsprintf() int
pub fn str2_(fmt charptr, ...) string {
argptr := C.va_list{}
C.va_start(argptr, fmt)
len := C.vsnprintf(0, 0, fmt, argptr) + 1
C.va_end(argptr)
buf := malloc(len)
C.va_start(argptr, fmt)
C.vsprintf(charptr(buf), fmt, argptr)
C.va_end(argptr)
//#ifdef DEBUG_ALLOC
// puts("_STR:");
// puts(buf);
//#endif
return tos2(buf)
}
*/