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io.Buffer, os.Timeval

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This commit is contained in:
Antoni Piasecki
2026-03-12 09:56:41 +01:00
parent 3fcd82cc04
commit 3fdf7bb99d
3 changed files with 21 additions and 16 deletions
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2
README.md
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@@ -5,7 +5,7 @@ A very cool language
## Features ## Features
* Clean indentation-based syntax * Clean indentation-based syntax
* Compiles to x86_64 Assembly * Compiles to x86_64 Assembly
* Pretty big [standard library](https://github.com/antpiasecki/zern/tree/main/src/std) * Growing [standard library](https://github.com/antpiasecki/zern/tree/main/src/std)
* Produces tiny static executables (~30KB with musl) * Produces tiny static executables (~30KB with musl)
* ~~No libc required~~ (SOON; still used for memory allocation and DNS resolution) * ~~No libc required~~ (SOON; still used for memory allocation and DNS resolution)
* Sometimes works * Sometimes works

9
examples/chip8.zr
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@@ -389,14 +389,13 @@ func main[argc: i64, argv: ptr] : i64
let c: CHIP8 = chip8_create() let c: CHIP8 = chip8_create()
let bytes_size: ptr = 0 let buffer: io.Buffer = io.read_binary_file(path)
let bytes: ptr = io.read_binary_file(path, ^bytes_size)
for i in 0..bytes_size for i in 0..buffer->size
c->memory[0x200 + i] = bytes[i] c->memory[0x200 + i] = buffer->data[i]
if disassemble if disassemble
chip8_disassemble(c, bytes_size / 2) chip8_disassemble(c, buffer->size / 2)
return 0 return 0
InitWindow(640, 320, "CHIP-8") InitWindow(640, 320, "CHIP-8")

26
src/std/std.zr
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@@ -101,18 +101,22 @@ func io.read_file[path: str] : str
buffer[n] = 0 buffer[n] = 0
return buffer return buffer
func io.read_binary_file[path: str, len_ptr: ptr] : ptr struct io.Buffer
data: ptr
size: i64
func io.read_binary_file[path: str] : io.Buffer
let fd: i64 = _builtin_syscall(SYS_openat, -100, path, 0, 0) let fd: i64 = _builtin_syscall(SYS_openat, -100, path, 0, 0)
if fd < 0 if fd < 0
panic("failed to open file") panic("failed to open file")
let size: i64 = _builtin_syscall(SYS_lseek, fd, 0, 2) let buffer: io.Buffer = new io.Buffer
buffer->size = _builtin_syscall(SYS_lseek, fd, 0, 2)
_builtin_syscall(SYS_lseek, fd, 0, 0) _builtin_syscall(SYS_lseek, fd, 0, 0)
let buffer: ptr = mem.alloc(size) buffer->data = mem.alloc(buffer->size)
_builtin_syscall(SYS_read, fd, buffer, size) _builtin_syscall(SYS_read, fd, buffer->data, buffer->size)
_builtin_syscall(SYS_close, fd) _builtin_syscall(SYS_close, fd)
mem.write64(len_ptr, size)
return buffer return buffer
func io.write_file[path: str, content: str] : void func io.write_file[path: str, content: str] : void
@@ -560,13 +564,15 @@ func os.urandom_i64[]: i64
mem.free(buffer) mem.free(buffer)
return n return n
struct os.Timeval
tv_sec: i64
tv_usec: i64
func os.time[] : i64 func os.time[] : i64
let tv: ptr = mem.alloc(16) let tv: os.Timeval = new os.Timeval
_builtin_syscall(SYS_gettimeofday, tv, 0) _builtin_syscall(SYS_gettimeofday, tv, 0)
let seconds: i64 = mem.read64(tv)
let microseconds: i64 = mem.read64(tv + 8)
mem.free(tv) mem.free(tv)
return seconds * 1000 + microseconds / 1000 return tv->tv_sec * 1000 + tv->tv_usec / 1000
// voodoo magic // voodoo magic
func os.shell[command: str] : i64 func os.shell[command: str] : i64
@@ -574,7 +580,7 @@ func os.shell[command: str] : i64
if pid == 0 if pid == 0
// leaky but not sure where can i free it // leaky but not sure where can i free it
let argv: Array = ["sh", "-c", command, 0] let argv: Array = ["sh", "-c", command, 0]
_builtin_syscall(SYS_execve, "/bin/sh", mem.read64(argv), _builtin_environ()) _builtin_syscall(SYS_execve, "/bin/sh", argv->data, _builtin_environ())
_builtin_syscall(SYS_exit, 1) _builtin_syscall(SYS_exit, 1)
else else
let status = 0 let status = 0