94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
#include <stdio.h>
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#include <stm32f4xx.h>
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "obj.h"
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#include "file.h"
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#include "ff.h"
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typedef struct _pyb_file_obj_t {
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mp_obj_base_t base;
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FIL fp;
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} pyb_file_obj_t;
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void file_obj_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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printf("<file %p>", self_in);
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}
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mp_obj_t file_obj_read(mp_obj_t self_in, mp_obj_t arg) {
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pyb_file_obj_t *self = self_in;
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int n = mp_obj_get_int(arg);
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byte *buf = m_new(byte, n);
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UINT n_out;
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f_read(&self->fp, buf, n, &n_out);
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return mp_obj_new_str(buf, n_out, false);
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}
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mp_obj_t file_obj_write(mp_obj_t self_in, mp_obj_t arg) {
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pyb_file_obj_t *self = self_in;
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uint l;
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const char *s = mp_obj_str_get_data(arg, &l);
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UINT n_out;
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FRESULT res = f_write(&self->fp, s, l, &n_out);
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if (res != FR_OK) {
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printf("File error: could not write to file; error code %d\n", res);
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} else if (n_out != l) {
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printf("File error: could not write all data to file; wrote %d / %d bytes\n", n_out, l);
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}
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return mp_const_none;
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}
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mp_obj_t file_obj_close(mp_obj_t self_in) {
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pyb_file_obj_t *self = self_in;
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f_close(&self->fp);
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return mp_const_none;
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}
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static MP_DEFINE_CONST_FUN_OBJ_2(file_obj_read_obj, file_obj_read);
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static MP_DEFINE_CONST_FUN_OBJ_2(file_obj_write_obj, file_obj_write);
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static MP_DEFINE_CONST_FUN_OBJ_1(file_obj_close_obj, file_obj_close);
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// TODO gc hook to close the file if not already closed
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static const mp_method_t file_methods[] = {
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{ "read", &file_obj_read_obj },
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{ "write", &file_obj_write_obj },
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{ "close", &file_obj_close_obj },
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{NULL, NULL},
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};
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static const mp_obj_type_t file_obj_type = {
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{ &mp_const_type },
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"File",
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.print = file_obj_print,
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.methods = file_methods,
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};
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mp_obj_t pyb_io_open(mp_obj_t o_filename, mp_obj_t o_mode) {
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const char *filename = mp_obj_str_get_str(o_filename);
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const char *mode = mp_obj_str_get_str(o_mode);
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pyb_file_obj_t *self = m_new_obj(pyb_file_obj_t);
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self->base.type = &file_obj_type;
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if (mode[0] == 'r') {
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// open for reading
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FRESULT res = f_open(&self->fp, filename, FA_READ);
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if (res != FR_OK) {
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printf("FileNotFoundError: [Errno 2] No such file or directory: '%s'\n", filename);
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return mp_const_none;
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}
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} else if (mode[0] == 'w') {
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// open for writing, truncate the file first
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FRESULT res = f_open(&self->fp, filename, FA_WRITE | FA_CREATE_ALWAYS);
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if (res != FR_OK) {
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printf("?FileError: could not create file: '%s'\n", filename);
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return mp_const_none;
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}
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} else {
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printf("ValueError: invalid mode: '%s'\n", mode);
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return mp_const_none;
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}
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return self;
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}
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