From f5c4671bfbad96bf346bd7e9a21fc4317b4959df Mon Sep 17 00:00:00 2001
From: Indrajith K L
Date: Sat, 3 Dec 2022 17:00:20 +0530
Subject: Adds most of the tools

---
 v_windows/v/vlib/builtin/builtin.c.v | 547 +++++++++++++++++++++++++++++++++++
 1 file changed, 547 insertions(+)
 create mode 100644 v_windows/v/vlib/builtin/builtin.c.v

(limited to 'v_windows/v/vlib/builtin/builtin.c.v')

diff --git a/v_windows/v/vlib/builtin/builtin.c.v b/v_windows/v/vlib/builtin/builtin.c.v
new file mode 100644
index 0000000..0379c83
--- /dev/null
+++ b/v_windows/v/vlib/builtin/builtin.c.v
@@ -0,0 +1,547 @@
+module builtin
+
+type FnExitCb = fn ()
+
+fn C.atexit(f FnExitCb) int
+fn C.strerror(int) &char
+
+[noreturn]
+fn vhalt() {
+	for {}
+}
+
+// exit terminates execution immediately and returns exit `code` to the shell.
+[noreturn]
+pub fn exit(code int) {
+	C.exit(code)
+}
+
+fn vcommithash() string {
+	return unsafe { tos5(&char(C.V_CURRENT_COMMIT_HASH)) }
+}
+
+// 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.
+[noreturn]
+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
+	$if freestanding {
+		bare_panic(s)
+	} $else {
+		eprintln('================ V panic ================')
+		eprintln('   module: $mod')
+		eprintln(' function: ${fn_name}()')
+		eprintln('  message: $s')
+		eprintln('     file: $file:$line_no')
+		eprintln('   v hash: $vcommithash()')
+		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(c'Backtrace')
+				}
+				C.exit(1)
+			}
+			print_backtrace_skipping_top_frames(1)
+			$if panics_break_into_debugger ? {
+				break_if_debugger_attached()
+			}
+			C.exit(1)
+		}
+	}
+	vhalt()
+}
+
+[noreturn]
+pub fn panic_optional_not_set(s string) {
+	panic('optional not set ($s)')
+}
+
+// panic prints a nice error message, then exits the process with exit code of 1.
+// It also shows a backtrace on most platforms.
+[noreturn]
+pub fn panic(s string) {
+	$if freestanding {
+		bare_panic(s)
+	} $else {
+		eprint('V panic: ')
+		eprintln(s)
+		eprintln('v hash: $vcommithash()')
+		$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(c'Backtrace')
+				}
+				C.exit(1)
+			}
+			print_backtrace_skipping_top_frames(1)
+			$if panics_break_into_debugger ? {
+				break_if_debugger_attached()
+			}
+			C.exit(1)
+		}
+	}
+	vhalt()
+}
+
+// return a C-API error message matching to `errnum`
+pub fn c_error_number_str(errnum int) string {
+	mut err_msg := ''
+	$if freestanding {
+		err_msg = 'error $errnum'
+	} $else {
+		$if !vinix {
+			c_msg := C.strerror(errnum)
+			err_msg = string{
+				str: &byte(c_msg)
+				len: unsafe { C.strlen(c_msg) }
+				is_lit: 1
+			}
+		}
+	}
+	return err_msg
+}
+
+// panic with a C-API error message matching `errnum`
+[noreturn]
+pub fn panic_error_number(basestr string, errnum int) {
+	panic(basestr + c_error_number_str(errnum))
+}
+
+// eprintln prints a message with a line end, to stderr. Both stderr and stdout are flushed.
+pub fn eprintln(s string) {
+	if s.str == 0 {
+		eprintln('eprintln(NIL)')
+		return
+	}
+	$if freestanding {
+		// flushing is only a thing with C.FILE from stdio.h, not on the syscall level
+		bare_eprint(s.str, u64(s.len))
+		bare_eprint(c'\n', 1)
+	} $else $if ios {
+		C.WrappedNSLog(s.str)
+	} $else {
+		C.fflush(C.stdout)
+		C.fflush(C.stderr)
+		// eprintln is used in panics, so it should not fail at all
+		$if android {
+			C.fprintf(C.stderr, c'%.*s\n', s.len, s.str)
+		}
+		_writeln_to_fd(2, s)
+		C.fflush(C.stderr)
+	}
+}
+
+// eprint prints a message to stderr. Both stderr and stdout are flushed.
+pub fn eprint(s string) {
+	if s.str == 0 {
+		eprint('eprint(NIL)')
+		return
+	}
+	$if freestanding {
+		// flushing is only a thing with C.FILE from stdio.h, not on the syscall level
+		bare_eprint(s.str, u64(s.len))
+	} $else $if ios {
+		// TODO: Implement a buffer as NSLog doesn't have a "print"
+		C.WrappedNSLog(s.str)
+	} $else {
+		C.fflush(C.stdout)
+		C.fflush(C.stderr)
+		$if android {
+			C.fprintf(C.stderr, c'%.*s', s.len, s.str)
+		}
+		_write_buf_to_fd(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.
+[manualfree]
+pub fn print(s string) {
+	$if android {
+		C.fprintf(C.stdout, c'%.*s', s.len, s.str) // logcat
+	}
+	// no else if for android termux support
+	$if ios {
+		// TODO: Implement a buffer as NSLog doesn't have a "print"
+		C.WrappedNSLog(s.str)
+	} $else $if freestanding {
+		bare_print(s.str, u64(s.len))
+	} $else {
+		_write_buf_to_fd(1, s.str, s.len)
+	}
+}
+
+// println prints a message with a line end, to stdout. stdout is flushed.
+[manualfree]
+pub fn println(s string) {
+	if s.str == 0 {
+		println('println(NIL)')
+		return
+	}
+	$if android {
+		C.fprintf(C.stdout, c'%.*s\n', s.len, s.str) // logcat
+		return
+	}
+	// no else if for android termux support
+	$if ios {
+		C.WrappedNSLog(s.str)
+		return
+	} $else $if freestanding {
+		bare_print(s.str, u64(s.len))
+		bare_print(c'\n', 1)
+		return
+	} $else {
+		_writeln_to_fd(1, s)
+	}
+}
+
+[manualfree]
+fn _writeln_to_fd(fd int, s string) {
+	unsafe {
+		buf_len := s.len + 1 // space for \n
+		mut buf := malloc(buf_len)
+		defer {
+			free(buf)
+		}
+		C.memcpy(buf, s.str, s.len)
+		buf[s.len] = `\n`
+		_write_buf_to_fd(fd, buf, buf_len)
+	}
+}
+
+[manualfree]
+fn _write_buf_to_fd(fd int, buf &byte, buf_len int) {
+	if buf_len <= 0 {
+		return
+	}
+	unsafe {
+		mut ptr := buf
+		mut remaining_bytes := buf_len
+		for remaining_bytes > 0 {
+			x := C.write(fd, ptr, remaining_bytes)
+			ptr += x
+			remaining_bytes -= x
+		}
+	}
+}
+
+__global total_m = i64(0)
+// 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) &byte {
+	if n <= 0 {
+		panic('> V malloc(<=0)')
+	}
+	$if vplayground ? {
+		if n > 10000 {
+			panic('allocating more than 10 KB at once is not allowed in the V playground')
+		}
+		if total_m > 50 * 1024 * 1024 {
+			panic('allocating more than 50 MB is not allowed in the V playground')
+		}
+	}
+	$if trace_malloc ? {
+		total_m += n
+		C.fprintf(C.stderr, c'_v_malloc %6d total %10d\n', n, total_m)
+		// print_backtrace()
+	}
+	mut res := &byte(0)
+	$if prealloc {
+		return unsafe { prealloc_malloc(n) }
+	} $else $if gcboehm ? {
+		unsafe {
+			res = C.GC_MALLOC(n)
+		}
+	} $else $if freestanding {
+		mut e := Errno{}
+		res, e = mm_alloc(u64(n))
+		if e != .enoerror {
+			eprint('malloc() failed: ')
+			eprintln(e.str())
+			panic('malloc() failed')
+		}
+	} $else {
+		res = unsafe { C.malloc(n) }
+	}
+	if res == 0 {
+		panic('malloc($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.
+		unsafe { C.memset(res, 0x88, n) }
+	}
+	return res
+}
+
+[unsafe]
+pub fn malloc_noscan(n int) &byte {
+	if n <= 0 {
+		panic('> V malloc(<=0)')
+	}
+	$if vplayground ? {
+		if n > 10000 {
+			panic('allocating more than 10 KB at once is not allowed in the V playground')
+		}
+		if total_m > 50 * 1024 * 1024 {
+			panic('allocating more than 50 MB is not allowed in the V playground')
+		}
+	}
+	$if trace_malloc ? {
+		total_m += n
+		C.fprintf(C.stderr, c'_v_malloc %6d total %10d\n', n, total_m)
+		// print_backtrace()
+	}
+	mut res := &byte(0)
+	$if prealloc {
+		return unsafe { prealloc_malloc(n) }
+	} $else $if gcboehm ? {
+		$if gcboehm_opt ? {
+			unsafe {
+				res = C.GC_MALLOC_ATOMIC(n)
+			}
+		} $else {
+			unsafe {
+				res = C.GC_MALLOC(n)
+			}
+		}
+	} $else $if freestanding {
+		mut e := Errno{}
+		res, e = mm_alloc(u64(n))
+		if e != .enoerror {
+			eprint('malloc() failed: ')
+			eprintln(e.str())
+			panic('malloc() failed')
+		}
+	} $else {
+		res = unsafe { C.malloc(n) }
+	}
+	if res == 0 {
+		panic('malloc($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.
+		unsafe { C.memset(res, 0x88, n) }
+	}
+	return res
+}
+
+// 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 &byte, n int) &byte {
+	$if trace_realloc ? {
+		C.fprintf(C.stderr, c'v_realloc %6d\n', n)
+	}
+	mut new_ptr := &byte(0)
+	$if prealloc {
+		unsafe {
+			new_ptr = malloc(n)
+			C.memcpy(new_ptr, b, n)
+		}
+		return new_ptr
+	} $else $if gcboehm ? {
+		new_ptr = unsafe { C.GC_REALLOC(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 &byte, old_size int, new_size int) &byte {
+	$if trace_realloc ? {
+		C.fprintf(C.stderr, c'realloc_data old_size: %6d new_size: %6d\n', old_size, new_size)
+	}
+	$if prealloc {
+		return unsafe { prealloc_realloc(old_data, old_size, new_size) }
+	}
+	$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)
+			free(old_data)
+			return new_ptr
+		}
+	}
+	mut nptr := &byte(0)
+	$if gcboehm ? {
+		nptr = unsafe { C.GC_REALLOC(old_data, new_size) }
+	} $else {
+		nptr = unsafe { C.realloc(old_data, new_size) }
+	}
+	if nptr == 0 {
+		panic('realloc_data($old_data, $old_size, $new_size) failed')
+	}
+	return nptr
+}
+
+// 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) &byte {
+	if n < 0 {
+		panic('calloc(<0)')
+	} else if n == 0 {
+		return &byte(0)
+	}
+	$if trace_vcalloc ? {
+		total_m += n
+		C.fprintf(C.stderr, c'vcalloc %6d total %10d\n', n, total_m)
+	}
+	$if prealloc {
+		return unsafe { prealloc_calloc(n) }
+	} $else $if gcboehm ? {
+		return unsafe { &byte(C.GC_MALLOC(n)) }
+	} $else {
+		return unsafe { C.calloc(1, n) }
+	}
+}
+
+// special versions of the above that allocate memory which is not scanned
+// for pointers (but is collected) when the Boehm garbage collection is used
+pub fn vcalloc_noscan(n int) &byte {
+	$if trace_vcalloc ? {
+		total_m += n
+		C.fprintf(C.stderr, c'vcalloc_noscan %6d total %10d\n', n, total_m)
+	}
+	$if prealloc {
+		return unsafe { prealloc_calloc(n) }
+	} $else $if gcboehm ? {
+		$if vplayground ? {
+			if n > 10000 {
+				panic('allocating more than 10 KB is not allowed in the playground')
+			}
+		}
+		if n < 0 {
+			panic('calloc(<0)')
+		}
+		return $if gcboehm_opt ? {
+			unsafe { &byte(C.memset(C.GC_MALLOC_ATOMIC(n), 0, n)) }
+		} $else {
+			unsafe { &byte(C.GC_MALLOC(n)) }
+		}
+	} $else {
+		return unsafe { vcalloc(n) }
+	}
+}
+
+// free allows for manually freeing memory allocated at the address `ptr`.
+[unsafe]
+pub fn free(ptr voidptr) {
+	$if prealloc {
+		return
+	} $else $if gcboehm ? {
+		// It is generally better to leave it to Boehm's gc to free things.
+		// Calling C.GC_FREE(ptr) was tried initially, but does not work
+		// well with programs that do manual management themselves.
+		//
+		// The exception is doing leak detection for manual memory management:
+		$if gcboehm_leak ? {
+			unsafe { C.GC_FREE(ptr) }
+		}
+	} $else {
+		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)
+	}
+}
+
+[unsafe]
+pub fn memdup_noscan(src voidptr, sz int) voidptr {
+	if sz == 0 {
+		return vcalloc_noscan(1)
+	}
+	unsafe {
+		mem := vcalloc_noscan(sz)
+		return C.memcpy(mem, src, sz)
+	}
+}
+
+[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
+}
+
+// print_backtrace shows a backtrace of the current call stack on stdout
+pub fn print_backtrace() {
+	// At the time of backtrace_symbols_fd call, the C stack would look something like this:
+	// * print_backtrace_skipping_top_frames
+	// * print_backtrace itself
+	// * the rest of the backtrace frames
+	// => top 2 frames should be skipped, since they will not be informative to the developer
+	$if !no_backtrace ? {
+		$if freestanding {
+			println(bare_backtrace())
+		} $else {
+			$if tinyc {
+				C.tcc_backtrace(c'Backtrace')
+			} $else {
+				print_backtrace_skipping_top_frames(2)
+			}
+		}
+	}
+}
-- 
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