139 lines
4.1 KiB
C
139 lines
4.1 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* SPDX-FileCopyrightText: Copyright (c) 2013-2016 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <assert.h>
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#include "py/runtime.h"
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#include "py/mperrno.h"
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#include "py/reader.h"
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typedef struct _mp_reader_mem_t {
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size_t free_len; // if >0 mem is freed on close by: m_free(beg, free_len)
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const byte *beg;
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const byte *cur;
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const byte *end;
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} mp_reader_mem_t;
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STATIC mp_uint_t mp_reader_mem_readbyte(void *data) {
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mp_reader_mem_t *reader = (mp_reader_mem_t *)data;
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if (reader->cur < reader->end) {
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return *reader->cur++;
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} else {
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return MP_READER_EOF;
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}
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}
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STATIC void mp_reader_mem_close(void *data) {
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mp_reader_mem_t *reader = (mp_reader_mem_t *)data;
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if (reader->free_len > 0) {
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m_del(char, (char *)reader->beg, reader->free_len);
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}
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m_del_obj(mp_reader_mem_t, reader);
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}
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void mp_reader_new_mem(mp_reader_t *reader, const byte *buf, size_t len, size_t free_len) {
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mp_reader_mem_t *rm = m_new_obj(mp_reader_mem_t);
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rm->free_len = free_len;
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rm->beg = buf;
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rm->cur = buf;
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rm->end = buf + len;
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reader->data = rm;
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reader->readbyte = mp_reader_mem_readbyte;
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reader->close = mp_reader_mem_close;
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}
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#if MICROPY_READER_POSIX
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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typedef struct _mp_reader_posix_t {
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bool close_fd;
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int fd;
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size_t len;
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size_t pos;
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byte buf[20];
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} mp_reader_posix_t;
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STATIC mp_uint_t mp_reader_posix_readbyte(void *data) {
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mp_reader_posix_t *reader = (mp_reader_posix_t *)data;
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if (reader->pos >= reader->len) {
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if (reader->len == 0) {
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return MP_READER_EOF;
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} else {
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int n = read(reader->fd, reader->buf, sizeof(reader->buf));
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if (n <= 0) {
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reader->len = 0;
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return MP_READER_EOF;
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}
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reader->len = n;
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reader->pos = 0;
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}
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}
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return reader->buf[reader->pos++];
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}
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STATIC void mp_reader_posix_close(void *data) {
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mp_reader_posix_t *reader = (mp_reader_posix_t *)data;
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if (reader->close_fd) {
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close(reader->fd);
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}
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m_del_obj(mp_reader_posix_t, reader);
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}
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void mp_reader_new_file_from_fd(mp_reader_t *reader, int fd, bool close_fd) {
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mp_reader_posix_t *rp = m_new_obj(mp_reader_posix_t);
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rp->close_fd = close_fd;
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rp->fd = fd;
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int n = read(rp->fd, rp->buf, sizeof(rp->buf));
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if (n == -1) {
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if (close_fd) {
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close(fd);
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}
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mp_raise_OSError(errno);
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}
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rp->len = n;
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rp->pos = 0;
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reader->data = rp;
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reader->readbyte = mp_reader_posix_readbyte;
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reader->close = mp_reader_posix_close;
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}
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#if !MICROPY_VFS_POSIX
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// If MICROPY_VFS_POSIX is defined then this function is provided by the VFS layer
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void mp_reader_new_file(mp_reader_t *reader, const char *filename) {
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int fd = open(filename, O_RDONLY, 0644);
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if (fd < 0) {
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mp_raise_OSError(errno);
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}
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mp_reader_new_file_from_fd(reader, fd, true);
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}
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#endif
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#endif
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