mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
340 lines
8.7 KiB
V
340 lines
8.7 KiB
V
module builtin
|
|
|
|
type FnExitCb = fn ()
|
|
|
|
fn C.atexit(f FnExitCb) int
|
|
|
|
// exit terminates execution immediately and returns exit `code` to the shell.
|
|
pub fn exit(code int) {
|
|
C.exit(code)
|
|
}
|
|
|
|
// panic_debug private function that V uses for panics, -cg/-g is passed
|
|
// recent versions of tcc print nicer backtraces automatically
|
|
// NB: the duplication here is because tcc_backtrace should be called directly
|
|
// inside the panic functions.
|
|
fn panic_debug(line_no int, file string, mod string, fn_name string, s string) {
|
|
// NB: the order here is important for a stabler test output
|
|
// module is less likely to change than function, etc...
|
|
// During edits, the line number will change most frequently,
|
|
// so it is last
|
|
eprintln('================ V panic ================')
|
|
eprintln(' module: $mod')
|
|
eprintln(' function: ${fn_name}()')
|
|
eprintln(' message: $s')
|
|
eprintln(' file: $file')
|
|
eprintln(' line: ' + line_no.str())
|
|
eprintln('=========================================')
|
|
$if exit_after_panic_message ? {
|
|
C.exit(1)
|
|
} $else {
|
|
$if no_backtrace ? {
|
|
C.exit(1)
|
|
} $else {
|
|
$if tinyc {
|
|
$if panics_break_into_debugger ? {
|
|
break_if_debugger_attached()
|
|
} $else {
|
|
C.tcc_backtrace('Backtrace')
|
|
}
|
|
C.exit(1)
|
|
}
|
|
print_backtrace_skipping_top_frames(1)
|
|
$if panics_break_into_debugger ? {
|
|
break_if_debugger_attached()
|
|
}
|
|
C.exit(1)
|
|
}
|
|
}
|
|
}
|
|
|
|
// panic prints a nice error message, then exits the process with exit code of 1.
|
|
// It also shows a backtrace on most platforms.
|
|
pub fn panic(s string) {
|
|
eprintln('V panic: $s')
|
|
$if exit_after_panic_message ? {
|
|
C.exit(1)
|
|
} $else {
|
|
$if no_backtrace ? {
|
|
C.exit(1)
|
|
} $else {
|
|
$if tinyc {
|
|
$if panics_break_into_debugger ? {
|
|
break_if_debugger_attached()
|
|
} $else {
|
|
C.tcc_backtrace('Backtrace')
|
|
}
|
|
C.exit(1)
|
|
}
|
|
print_backtrace_skipping_top_frames(1)
|
|
$if panics_break_into_debugger ? {
|
|
break_if_debugger_attached()
|
|
}
|
|
C.exit(1)
|
|
}
|
|
}
|
|
}
|
|
|
|
// eprintln prints a message with a line end, to stderr. Both stderr and stdout are flushed.
|
|
pub fn eprintln(s string) {
|
|
C.fflush(C.stdout)
|
|
C.fflush(C.stderr)
|
|
// eprintln is used in panics, so it should not fail at all
|
|
$if android {
|
|
if s.str == 0 {
|
|
C.fprintf(C.stderr, c'eprintln(NIL)\n')
|
|
} else {
|
|
C.fprintf(C.stderr, c'%.*s\n', s.len, s.str)
|
|
}
|
|
} $else {
|
|
if s.str == 0 {
|
|
C.write(2, c'eprintln(NIL)\n', 14)
|
|
} else {
|
|
C.write(2, s.str, s.len)
|
|
C.write(2, c'\n', 1)
|
|
}
|
|
}
|
|
C.fflush(C.stderr)
|
|
}
|
|
|
|
// eprint prints a message to stderr. Both stderr and stdout are flushed.
|
|
pub fn eprint(s string) {
|
|
C.fflush(C.stdout)
|
|
C.fflush(C.stderr)
|
|
$if android {
|
|
if s.str == 0 {
|
|
C.fprintf(C.stderr, c'eprint(NIL)')
|
|
} else {
|
|
C.fprintf(C.stderr, c'%.*s', s.len, s.str)
|
|
}
|
|
} $else {
|
|
if s.str == 0 {
|
|
C.write(2, c'eprint(NIL)', 11)
|
|
} else {
|
|
C.write(2, s.str, s.len)
|
|
}
|
|
}
|
|
C.fflush(C.stderr)
|
|
}
|
|
|
|
// print prints a message to stdout. Unlike `println` stdout is not automatically flushed.
|
|
// A call to `flush()` will flush the output buffer to stdout.
|
|
pub fn print(s string) {
|
|
$if android {
|
|
C.fprintf(C.stdout, c'%.*s', s.len, s.str)
|
|
} $else {
|
|
C.write(1, s.str, s.len)
|
|
}
|
|
}
|
|
|
|
/*
|
|
#include "@VROOT/vlib/darwin/darwin.m"
|
|
fn C.nsstring2(s string) voidptr
|
|
fn C.NSLog(x voidptr)
|
|
#include <asl.h>
|
|
fn C.asl_log(voidptr, voidptr, int, charptr)
|
|
*/
|
|
// println prints a message with a line end, to stdout. stdout is flushed.
|
|
pub fn println(s string) {
|
|
$if windows {
|
|
print(s)
|
|
print('\n')
|
|
} $else {
|
|
// For debugging .app applications (no way to read stdout) so that it's printed to macOS Console
|
|
/*
|
|
$if macos {
|
|
C.asl_log(0, 0, C.ASL_LEVEL_ERR, s.str)
|
|
}
|
|
*/
|
|
// TODO: a syscall sys_write on linux works, except for the v repl.
|
|
// Probably it is a stdio buffering issue. Needs more testing...
|
|
// $if linux {
|
|
// $if !android {
|
|
// snl := s + '\n'
|
|
// C.syscall(/* sys_write */ 1, /* stdout_value */ 1, snl.str, s.len+1)
|
|
// return
|
|
// }
|
|
// }
|
|
C.printf('%.*s\n', s.len, s.str)
|
|
}
|
|
}
|
|
|
|
// malloc dynamically allocates a `n` bytes block of memory on the heap.
|
|
// malloc returns a `byteptr` pointing to the memory address of the allocated space.
|
|
// unlike the `calloc` family of functions - malloc will not zero the memory block.
|
|
[unsafe]
|
|
pub fn malloc(n int) byteptr {
|
|
if n <= 0 {
|
|
panic('> V malloc(<=0)')
|
|
}
|
|
$if vplayground ? {
|
|
if n > 10000 {
|
|
panic('allocating more than 10 KB is not allowed in the playground')
|
|
}
|
|
}
|
|
$if trace_malloc ? {
|
|
total_m += n
|
|
C.fprintf(C.stderr, c'v_malloc %d total %d\n', n, total_m)
|
|
// print_backtrace()
|
|
}
|
|
mut res := byteptr(0)
|
|
$if prealloc {
|
|
res = g_m2_ptr
|
|
unsafe {
|
|
g_m2_ptr += n
|
|
}
|
|
nr_mallocs++
|
|
} $else {
|
|
res = unsafe { C.malloc(n) }
|
|
if res == 0 {
|
|
panic('malloc($n) failed')
|
|
}
|
|
}
|
|
$if debug_malloc ? {
|
|
// Fill in the memory with something != 0, so it is easier to spot
|
|
// when the calling code wrongly relies on it being zeroed.
|
|
C.memset(res, 0x88, n)
|
|
}
|
|
return res
|
|
}
|
|
|
|
/*
|
|
#include <malloc/malloc.h>
|
|
fn malloc_size(b byteptr) int
|
|
*/
|
|
// v_realloc resizes the memory block `b` with `n` bytes.
|
|
// The `b byteptr` must be a pointer to an existing memory block
|
|
// previously allocated with `malloc`, `v_calloc` or `vcalloc`.
|
|
// Please, see also realloc_data, and use it instead if possible.
|
|
[unsafe]
|
|
pub fn v_realloc(b byteptr, n int) byteptr {
|
|
mut new_ptr := byteptr(0)
|
|
$if prealloc {
|
|
unsafe {
|
|
new_ptr = malloc(n)
|
|
C.memcpy(new_ptr, b, n)
|
|
}
|
|
} $else {
|
|
new_ptr = unsafe { C.realloc(b, n) }
|
|
if new_ptr == 0 {
|
|
panic('realloc($n) failed')
|
|
}
|
|
}
|
|
return new_ptr
|
|
}
|
|
|
|
// realloc_data resizes the memory block pointed by `old_data` to `new_size`
|
|
// bytes. `old_data` must be a pointer to an existing memory block, previously
|
|
// allocated with `malloc`, `v_calloc` or `vcalloc`, of size `old_data`.
|
|
// realloc_data returns a pointer to the new location of the block.
|
|
// NB: if you know the old data size, it is preferable to call `realloc_data`,
|
|
// instead of `v_realloc`, at least during development, because `realloc_data`
|
|
// can make debugging easier, when you compile your program with
|
|
// `-d debug_realloc`.
|
|
[unsafe]
|
|
pub fn realloc_data(old_data byteptr, old_size int, new_size int) byteptr {
|
|
$if prealloc {
|
|
unsafe {
|
|
new_ptr := malloc(new_size)
|
|
min_size := if old_size < new_size { old_size } else { new_size }
|
|
C.memcpy(new_ptr, old_data, min_size)
|
|
return new_ptr
|
|
}
|
|
}
|
|
$if debug_realloc ? {
|
|
// NB: this is slower, but helps debugging memory problems.
|
|
// The main idea is to always force reallocating:
|
|
// 1) allocate a new memory block
|
|
// 2) copy the old to the new
|
|
// 3) fill the old with 0x57 (`W`)
|
|
// 4) free the old block
|
|
// => if there is still a pointer to the old block somewhere
|
|
// it will point to memory that is now filled with 0x57.
|
|
unsafe {
|
|
new_ptr := malloc(new_size)
|
|
min_size := if old_size < new_size { old_size } else { new_size }
|
|
C.memcpy(new_ptr, old_data, min_size)
|
|
C.memset(old_data, 0x57, old_size)
|
|
C.free(old_data)
|
|
return new_ptr
|
|
}
|
|
}
|
|
nptr := unsafe { C.realloc(old_data, new_size) }
|
|
if nptr == 0 {
|
|
panic('realloc_data($old_data, $old_size, $new_size) failed')
|
|
}
|
|
return nptr
|
|
}
|
|
|
|
// v_calloc dynamically allocates a zeroed `n` bytes block of memory on the heap.
|
|
// v_calloc returns a `byteptr` pointing to the memory address of the allocated space.
|
|
pub fn v_calloc(n int) byteptr {
|
|
return C.calloc(1, n)
|
|
}
|
|
|
|
// vcalloc dynamically allocates a zeroed `n` bytes block of memory on the heap.
|
|
// vcalloc returns a `byteptr` pointing to the memory address of the allocated space.
|
|
// Unlike `v_calloc` vcalloc checks for negative values given in `n`.
|
|
pub fn vcalloc(n int) byteptr {
|
|
if n < 0 {
|
|
panic('calloc(<=0)')
|
|
} else if n == 0 {
|
|
return byteptr(0)
|
|
}
|
|
return C.calloc(1, n)
|
|
}
|
|
|
|
// free allows for manually freeing memory allocated at the address `ptr`.
|
|
[unsafe]
|
|
pub fn free(ptr voidptr) {
|
|
$if prealloc {
|
|
return
|
|
}
|
|
C.free(ptr)
|
|
}
|
|
|
|
// memdup dynamically allocates a `sz` bytes block of memory on the heap
|
|
// memdup then copies the contents of `src` into the allocated space and
|
|
// returns a pointer to the newly allocated space.
|
|
[unsafe]
|
|
pub fn memdup(src voidptr, sz int) voidptr {
|
|
if sz == 0 {
|
|
return vcalloc(1)
|
|
}
|
|
unsafe {
|
|
mem := malloc(sz)
|
|
return C.memcpy(mem, src, sz)
|
|
}
|
|
}
|
|
|
|
// v_ptr_free is used internally to manually free up memory allocated at the address `ptr`.
|
|
fn v_ptr_free(ptr voidptr) {
|
|
$if prealloc {
|
|
return
|
|
}
|
|
C.free(ptr)
|
|
}
|
|
|
|
// is_atty returns 1 if the `fd` file descriptor is open and refers to a terminal
|
|
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)
|
|
}
|
|
}
|
|
|
|
[inline]
|
|
fn v_fixed_index(i int, len int) int {
|
|
$if !no_bounds_checking ? {
|
|
if i < 0 || i >= len {
|
|
s := 'fixed array index out of range (index: $i, len: $len)'
|
|
panic(s)
|
|
}
|
|
}
|
|
return i
|
|
}
|