139 lines
3.9 KiB
C
139 lines
3.9 KiB
C
#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include "nlr.h"
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#include "misc.h"
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#include "mpconfig.h"
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#include "mpqstr.h"
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#include "obj.h"
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#include "runtime.h"
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#include "stream.h"
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typedef struct _mp_obj_fdfile_t {
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mp_obj_base_t base;
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int fd;
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} mp_obj_fdfile_t;
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static const mp_obj_type_t rawfile_type;
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static void fdfile_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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mp_obj_fdfile_t *self = self_in;
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print(env, "<io.FileIO %d>", self->fd);
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}
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static machine_int_t fdfile_read(mp_obj_t o_in, void *buf, machine_uint_t size, int *errcode) {
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mp_obj_fdfile_t *o = o_in;
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machine_int_t r = read(o->fd, buf, size);
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if (r == -1) {
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*errcode = errno;
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}
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return r;
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}
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static machine_int_t fdfile_write(mp_obj_t o_in, const void *buf, machine_uint_t size, int *errcode) {
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mp_obj_fdfile_t *o = o_in;
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machine_int_t r = write(o->fd, buf, size);
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if (r == -1) {
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*errcode = errno;
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}
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return r;
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}
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static mp_obj_t fdfile_close(mp_obj_t self_in) {
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mp_obj_fdfile_t *self = self_in;
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close(self->fd);
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return mp_const_none;
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(fdfile_close_obj, fdfile_close);
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static mp_obj_fdfile_t *fdfile_new(int fd) {
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mp_obj_fdfile_t *o = m_new_obj(mp_obj_fdfile_t);
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o->base.type = &rawfile_type;
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o->fd = fd;
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return o;
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}
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static mp_obj_t fdfile_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
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mp_obj_fdfile_t *o = m_new_obj(mp_obj_fdfile_t);
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o->base.type = type_in;
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if (MP_OBJ_IS_SMALL_INT(args[0])) {
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o->fd = MP_OBJ_SMALL_INT_VALUE(args[0]);
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return o;
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}
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const char *fname = qstr_str(mp_obj_get_qstr(args[0]));
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const char *mode_s;
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if (n_args > 1) {
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mode_s = qstr_str(mp_obj_get_qstr(args[1]));
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} else {
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mode_s = "r";
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}
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int mode = 0;
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while (*mode_s) {
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switch (*mode_s++) {
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// Note: these assume O_RDWR = O_RDONLY | O_WRONLY
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case 'r':
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mode |= O_RDONLY;
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break;
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case 'w':
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mode |= O_WRONLY | O_CREAT | O_TRUNC;
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break;
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case 'a':
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mode |= O_APPEND;
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break;
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case '+':
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mode |= O_RDWR;
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break;
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}
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}
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int fd = open(fname, mode, 0644);
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if (fd == -1) {
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nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_OSError, "[Errno %d]", errno));
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}
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return fdfile_new(fd);
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}
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static const mp_method_t rawfile_type_methods[] = {
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{ "read", &mp_stream_read_obj },
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{ "readall", &mp_stream_readall_obj },
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{ "readline", &mp_stream_unbuffered_readline_obj},
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{ "write", &mp_stream_write_obj },
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{ "close", &fdfile_close_obj },
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{ NULL, NULL },
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};
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static const mp_obj_type_t rawfile_type = {
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{ &mp_const_type },
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"io.FileIO",
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.print = fdfile_print,
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.make_new = fdfile_make_new,
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.getiter = mp_identity,
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.iternext = mp_stream_unbuffered_iter,
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.stream_p = {
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.read = fdfile_read,
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.write = fdfile_write,
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},
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.methods = rawfile_type_methods,
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};
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// Factory function for I/O stream classes
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mp_obj_t mp_builtin_open(uint n_args, const mp_obj_t *args) {
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// TODO: analyze mode and buffering args and instantiate appropriate type
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return fdfile_make_new((mp_obj_t)&rawfile_type, n_args, 0, args);
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}
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MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_open_obj, 1, 2, mp_builtin_open);
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void file_init() {
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rt_store_name(qstr_from_str_static("open"), (mp_obj_t)&mp_builtin_open_obj);
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mp_obj_t m_sys = mp_obj_new_module(qstr_from_str_static("sys"));
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rt_store_attr(m_sys, qstr_from_str_static("stdin"), fdfile_new(STDIN_FILENO));
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rt_store_attr(m_sys, qstr_from_str_static("stdout"), fdfile_new(STDOUT_FILENO));
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rt_store_attr(m_sys, qstr_from_str_static("stderr"), fdfile_new(STDERR_FILENO));
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}
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