mirror of
https://github.com/Ed94/Odin.git
synced 2026-06-16 02:42:22 -07:00
gingerBill
293 lines
8.3 KiB
Odin
293 lines
8.3 KiB
Odin
foreign import dl "system:dl"
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foreign import libc "system:c"
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import "core:strings.odin"
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import "core:mem.odin"
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Handle :: i32;
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File_Time :: u64;
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Errno :: int;
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O_RDONLY :: 0x00000;
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O_WRONLY :: 0x00001;
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O_RDWR :: 0x00002;
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O_CREATE :: 0x00040;
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O_EXCL :: 0x00080;
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O_NOCTTY :: 0x00100;
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O_TRUNC :: 0x00200;
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O_NONBLOCK :: 0x00800;
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O_APPEND :: 0x00400;
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O_SYNC :: 0x01000;
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O_ASYNC :: 0x02000;
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O_CLOEXEC :: 0x80000;
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SEEK_SET :: 0;
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SEEK_CUR :: 1;
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SEEK_END :: 2;
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SEEK_DATA :: 3;
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SEEK_HOLE :: 4;
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SEEK_MAX :: SEEK_HOLE;
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// NOTE(zangent): These are OS specific!
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// Do not mix these up!
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RTLD_LAZY :: 0x1;
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RTLD_NOW :: 0x2;
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RTLD_LOCAL :: 0x4;
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RTLD_GLOBAL :: 0x8;
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RTLD_NODELETE :: 0x80;
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RTLD_NOLOAD :: 0x10;
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RTLD_FIRST :: 0x100;
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// "Argv" arguments converted to Odin strings
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args := _alloc_command_line_arguments();
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_File_Time :: struct {
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seconds: i64,
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nanoseconds: i64,
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}
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Stat :: struct {
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device_id: i32, // ID of device containing file
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mode: u16, // Mode of the file
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nlink: u16, // Number of hard links
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serial: u64, // File serial number
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uid: u32, // User ID of the file's owner
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gid: u32, // Group ID of the file's group
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rdev: i32, // Device ID, if device
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last_access: File_Time, // Time of last access
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modified: File_Time, // Time of last modification
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status_change: File_Time, // Time of last status change
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created: File_Time, // Time of creation
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size: i64, // Size of the file, in bytes
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blocks: i64, // Number of blocks allocated for the file
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block_size: i32, // Optimal blocksize for I/O
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flags: u32, // User-defined flags for the file
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gen_num: u32, // File generation number ...?
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_spare: i32, // RESERVED
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_reserve1,
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_reserve2: i64, // RESERVED
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};
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// File type
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S_IFMT :: 0170000; // Type of file mask
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S_IFIFO :: 0010000; // Named pipe (fifo)
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S_IFCHR :: 0020000; // Character special
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S_IFDIR :: 0040000; // Directory
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S_IFBLK :: 0060000; // Block special
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S_IFREG :: 0100000; // Regular
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S_IFLNK :: 0120000; // Symbolic link
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S_IFSOCK :: 0140000; // Socket
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// File mode
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// Read, write, execute/search by owner
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S_IRWXU :: 0000700; // RWX mask for owner
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S_IRUSR :: 0000400; // R for owner
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S_IWUSR :: 0000200; // W for owner
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S_IXUSR :: 0000100; // X for owner
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// Read, write, execute/search by group
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S_IRWXG :: 0000070; // RWX mask for group
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S_IRGRP :: 0000040; // R for group
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S_IWGRP :: 0000020; // W for group
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S_IXGRP :: 0000010; // X for group
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// Read, write, execute/search by others
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S_IRWXO :: 0000007; // RWX mask for other
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S_IROTH :: 0000004; // R for other
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S_IWOTH :: 0000002; // W for other
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S_IXOTH :: 0000001; // X for other
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S_ISUID :: 0004000; // Set user id on execution
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S_ISGID :: 0002000; // Set group id on execution
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S_ISVTX :: 0001000; // Directory restrcted delete
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S_ISLNK :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFLNK;
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S_ISREG :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFREG;
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S_ISDIR :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFDIR;
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S_ISCHR :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFCHR;
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S_ISBLK :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFBLK;
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S_ISFIFO :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFIFO;
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S_ISSOCK :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFSOCK;
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R_OK :: 4; // Test for read permission
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W_OK :: 2; // Test for write permission
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X_OK :: 1; // Test for execute permission
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F_OK :: 0; // Test for file existance
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foreign libc {
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@(link_name="open") _unix_open :: proc(path: ^byte, mode: int) -> Handle ---;
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@(link_name="close") _unix_close :: proc(handle: Handle) ---;
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@(link_name="read") _unix_read :: proc(handle: Handle, buffer: rawptr, count: int) -> int ---;
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@(link_name="write") _unix_write :: proc(handle: Handle, buffer: rawptr, count: int) -> int ---;
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@(link_name="lseek") _unix_lseek :: proc(fs: Handle, offset: int, whence: int) -> int ---;
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@(link_name="gettid") _unix_gettid :: proc() -> u64 ---;
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@(link_name="stat") _unix_stat :: proc(path: ^byte, stat: ^Stat) -> int ---;
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@(link_name="access") _unix_access :: proc(path: ^byte, mask: int) -> int ---;
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@(link_name="malloc") _unix_malloc :: proc(size: int) -> rawptr ---;
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@(link_name="calloc") _unix_calloc :: proc(num, size: int) -> rawptr ---;
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@(link_name="free") _unix_free :: proc(ptr: rawptr) ---;
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@(link_name="realloc") _unix_realloc :: proc(ptr: rawptr, size: int) -> rawptr ---;
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@(link_name="getenv") _unix_getenv :: proc(^byte) -> ^byte ---;
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@(link_name="exit") _unix_exit :: proc(status: int) ---;
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}
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foreign dl {
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@(link_name="dlopen") _unix_dlopen :: proc(filename: ^byte, flags: int) -> rawptr ---;
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@(link_name="dlsym") _unix_dlsym :: proc(handle: rawptr, symbol: ^byte) -> rawptr ---;
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@(link_name="dlclose") _unix_dlclose :: proc(handle: rawptr) -> int ---;
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@(link_name="dlerror") _unix_dlerror :: proc() -> ^byte ---;
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}
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// TODO(zangent): Change this to just `open` when Bill fixes overloading.
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open_simple :: proc(path: string, mode: int) -> (Handle, Errno) {
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cstr := strings.new_c_string(path);
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defer free(cstr);
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handle := _unix_open(cstr, mode);
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if handle == -1 {
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return 0, 1;
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}
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return handle, 0;
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}
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// NOTE(zangent): This is here for compatability reasons. Should this be here?
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open :: proc(path: string, mode: int = O_RDONLY, perm: u32 = 0) -> (Handle, Errno) {
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return open_simple(path, mode);
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}
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close :: proc(fd: Handle) {
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_unix_close(fd);
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}
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write :: proc(fd: Handle, data: []u8) -> (int, Errno) {
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assert(fd != -1);
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bytes_written := _unix_write(fd, &data[0], len(data));
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if(bytes_written == -1) {
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return 0, 1;
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}
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return bytes_written, 0;
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}
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read :: proc(fd: Handle, data: []u8) -> (int, Errno) {
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assert(fd != -1);
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bytes_read := _unix_read(fd, &data[0], len(data));
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if bytes_read == -1 {
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return 0, 1;
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}
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return bytes_read, 0;
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}
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seek :: proc(fd: Handle, offset: i64, whence: int) -> (i64, Errno) {
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assert(fd != -1);
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final_offset := i64(_unix_lseek(fd, int(offset), whence));
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if final_offset == -1 {
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return 0, 1;
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}
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return final_offset, 0;
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}
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file_size :: proc(fd: Handle) -> (i64, Errno) {
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prev, _ := seek(fd, 0, SEEK_CUR);
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size, err := seek(fd, 0, SEEK_END);
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seek(fd, prev, SEEK_SET);
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return i64(size), err;
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}
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// NOTE(bill): Uses startup to initialize it
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stdin: Handle = 0; // get_std_handle(win32.STD_INPUT_HANDLE);
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stdout: Handle = 1; // get_std_handle(win32.STD_OUTPUT_HANDLE);
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stderr: Handle = 2; // get_std_handle(win32.STD_ERROR_HANDLE);
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/* TODO(zangent): Implement these!
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last_write_time :: proc(fd: Handle) -> File_Time {}
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last_write_time_by_name :: proc(name: string) -> File_Time {}
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*/
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stat :: inline proc(path: string) -> (Stat, bool) {
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s: Stat;
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cstr := strings.new_c_string(path);
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defer free(cstr);
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ret_int := _unix_stat(cstr, &s);
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return s, ret_int==0;
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}
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access :: inline proc(path: string, mask: int) -> bool {
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cstr := strings.new_c_string(path);
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defer free(cstr);
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return _unix_access(cstr, mask) == 0;
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}
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heap_alloc :: inline proc(size: int) -> rawptr {
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assert(size > 0);
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return _unix_calloc(1, size);
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}
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heap_resize :: inline proc(ptr: rawptr, new_size: int) -> rawptr {
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return _unix_realloc(ptr, new_size);
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}
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heap_free :: inline proc(ptr: rawptr) {
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_unix_free(ptr);
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}
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getenv :: proc(name: string) -> (string, bool) {
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path_str := strings.new_c_string(name);
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defer free(path_str);
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cstr := _unix_getenv(path_str);
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if cstr == nil {
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return "", false;
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}
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return strings.to_odin_string(cstr), true;
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}
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exit :: inline proc(code: int) {
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_unix_exit(code);
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}
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current_thread_id :: proc() -> int {
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// return int(_unix_gettid());
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return 0;
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}
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dlopen :: inline proc(filename: string, flags: int) -> rawptr {
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cstr := strings.new_c_string(filename);
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defer free(cstr);
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handle := _unix_dlopen(cstr, flags);
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return handle;
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}
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dlsym :: inline proc(handle: rawptr, symbol: string) -> rawptr {
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assert(handle != nil);
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cstr := strings.new_c_string(symbol);
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defer free(cstr);
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proc_handle := _unix_dlsym(handle, cstr);
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return proc_handle;
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}
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dlclose :: inline proc(handle: rawptr) -> bool {
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assert(handle != nil);
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return _unix_dlclose(handle) == 0;
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}
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dlerror :: proc() -> string {
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return strings.to_odin_string(_unix_dlerror());
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}
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_alloc_command_line_arguments :: proc() -> []string {
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args := make([]string, __argc__);
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for i in 0..__argc__ {
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args[i] = strings.to_odin_string((__argv__+i)^);
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}
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return args;
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}
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