add circuitpython code

1 files changed, 260 insertions, 0 deletions

diff --git a/circuitpython/extmod/vfs_lfsx_file.c b/circuitpython/extmod/vfs_lfsx_file.c
new file mode 100644
index 0000000..da0c140
--- /dev/null
+++ b/circuitpython/extmod/vfs_lfsx_file.c
@@ -0,0 +1,260 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019-2020 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "py/runtime.h"
+#include "py/stream.h"
+#include "py/mperrno.h"
+#include "extmod/vfs.h"
+
+STATIC void MP_VFS_LFSx(check_open)(MP_OBJ_VFS_LFSx_FILE * self) {
+    if (self->vfs == NULL) {
+        mp_raise_ValueError(NULL);
+    }
+}
+
+STATIC void MP_VFS_LFSx(file_print)(const mp_print_t * print, mp_obj_t self_in, mp_print_kind_t kind) {
+    (void)self_in;
+    (void)kind;
+    mp_printf(print, "<io.%s>", mp_obj_get_type_str(self_in));
+}
+
+mp_obj_t MP_VFS_LFSx(file_open)(mp_obj_t self_in, mp_obj_t path_in, mp_obj_t mode_in) {
+    MP_OBJ_VFS_LFSx *self = MP_OBJ_TO_PTR(self_in);
+
+    int flags = 0;
+    const mp_obj_type_t *type = &MP_TYPE_VFS_LFSx_(_textio);
+    const char *mode_str = mp_obj_str_get_str(mode_in);
+    for (; *mode_str; ++mode_str) {
+        int new_flags = 0;
+        switch (*mode_str) {
+            case 'r':
+                new_flags = LFSx_MACRO(_O_RDONLY);
+                break;
+            case 'w':
+                new_flags = LFSx_MACRO(_O_WRONLY) | LFSx_MACRO(_O_CREAT) | LFSx_MACRO(_O_TRUNC);
+                break;
+            case 'x':
+                new_flags = LFSx_MACRO(_O_WRONLY) | LFSx_MACRO(_O_CREAT) | LFSx_MACRO(_O_EXCL);
+                break;
+            case 'a':
+                new_flags = LFSx_MACRO(_O_WRONLY) | LFSx_MACRO(_O_CREAT) | LFSx_MACRO(_O_APPEND);
+                break;
+            case '+':
+                flags |= LFSx_MACRO(_O_RDWR);
+                break;
+            #if MICROPY_PY_IO_FILEIO
+            case 'b':
+                type = &MP_TYPE_VFS_LFSx_(_fileio);
+                break;
+            #endif
+            case 't':
+                type = &MP_TYPE_VFS_LFSx_(_textio);
+                break;
+        }
+        if (new_flags) {
+            if (flags) {
+                mp_raise_ValueError(NULL);
+            }
+            flags = new_flags;
+        }
+    }
+    if (flags == 0) {
+        flags = LFSx_MACRO(_O_RDONLY);
+    }
+
+    #if LFS_BUILD_VERSION == 1
+    MP_OBJ_VFS_LFSx_FILE *o = m_new_obj_var_with_finaliser(MP_OBJ_VFS_LFSx_FILE, uint8_t, self->lfs.cfg->prog_size);
+    #else
+    MP_OBJ_VFS_LFSx_FILE *o = m_new_obj_var_with_finaliser(MP_OBJ_VFS_LFSx_FILE, uint8_t, self->lfs.cfg->cache_size);
+    #endif
+    o->base.type = type;
+    o->vfs = self;
+    #if !MICROPY_GC_CONSERVATIVE_CLEAR
+    memset(&o->file, 0, sizeof(o->file));
+    memset(&o->cfg, 0, sizeof(o->cfg));
+    #endif
+    o->cfg.buffer = &o->file_buffer[0];
+
+    #if LFS_BUILD_VERSION == 2
+    if (self->enable_mtime) {
+        lfs_get_mtime(&o->mtime[0]);
+        o->attrs[0].type = LFS_ATTR_MTIME;
+        o->attrs[0].buffer = &o->mtime[0];
+        o->attrs[0].size = sizeof(o->mtime);
+        o->cfg.attrs = &o->attrs[0];
+        o->cfg.attr_count = MP_ARRAY_SIZE(o->attrs);
+    }
+    #endif
+
+    const char *path = MP_VFS_LFSx(make_path)(self, path_in);
+    int ret = LFSx_API(file_opencfg)(&self->lfs, &o->file, path, flags, &o->cfg);
+    if (ret < 0) {
+        o->vfs = NULL;
+        mp_raise_OSError(-ret);
+    }
+
+    return MP_OBJ_FROM_PTR(o);
+}
+
+STATIC mp_obj_t MP_VFS_LFSx(file___exit__)(size_t n_args, const mp_obj_t *args) {
+    (void)n_args;
+    return mp_stream_close(args[0]);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(MP_VFS_LFSx(file___exit___obj), 4, 4, MP_VFS_LFSx(file___exit__));
+
+STATIC mp_uint_t MP_VFS_LFSx(file_read)(mp_obj_t self_in, void *buf, mp_uint_t size, int *errcode) {
+    MP_OBJ_VFS_LFSx_FILE *self = MP_OBJ_TO_PTR(self_in);
+    MP_VFS_LFSx(check_open)(self);
+    LFSx_API(ssize_t) sz = LFSx_API(file_read)(&self->vfs->lfs, &self->file, buf, size);
+    if (sz < 0) {
+        *errcode = -sz;
+        return MP_STREAM_ERROR;
+    }
+    return sz;
+}
+
+STATIC mp_uint_t MP_VFS_LFSx(file_write)(mp_obj_t self_in, const void *buf, mp_uint_t size, int *errcode) {
+    MP_OBJ_VFS_LFSx_FILE *self = MP_OBJ_TO_PTR(self_in);
+    MP_VFS_LFSx(check_open)(self);
+    #if LFS_BUILD_VERSION == 2
+    if (self->vfs->enable_mtime) {
+        lfs_get_mtime(&self->mtime[0]);
+    }
+    #endif
+    LFSx_API(ssize_t) sz = LFSx_API(file_write)(&self->vfs->lfs, &self->file, buf, size);
+    if (sz < 0) {
+        *errcode = -sz;
+        return MP_STREAM_ERROR;
+    }
+    return sz;
+}
+
+STATIC mp_uint_t MP_VFS_LFSx(file_ioctl)(mp_obj_t self_in, mp_uint_t request, uintptr_t arg, int *errcode) {
+    MP_OBJ_VFS_LFSx_FILE *self = MP_OBJ_TO_PTR(self_in);
+
+    if (request != MP_STREAM_CLOSE) {
+        MP_VFS_LFSx(check_open)(self);
+    }
+
+    if (request == MP_STREAM_SEEK) {
+        struct mp_stream_seek_t *s = (struct mp_stream_seek_t *)(uintptr_t)arg;
+        int res = LFSx_API(file_seek)(&self->vfs->lfs, &self->file, s->offset, s->whence);
+        if (res < 0) {
+            *errcode = -res;
+            return MP_STREAM_ERROR;
+        }
+        res = LFSx_API(file_tell)(&self->vfs->lfs, &self->file);
+        if (res < 0) {
+            *errcode = -res;
+            return MP_STREAM_ERROR;
+        }
+        s->offset = res;
+        return 0;
+    } else if (request == MP_STREAM_FLUSH) {
+        int res = LFSx_API(file_sync)(&self->vfs->lfs, &self->file);
+        if (res < 0) {
+            *errcode = -res;
+            return MP_STREAM_ERROR;
+        }
+        return 0;
+    } else if (request == MP_STREAM_CLOSE) {
+        if (self->vfs == NULL) {
+            return 0;
+        }
+        int res = LFSx_API(file_close)(&self->vfs->lfs, &self->file);
+        self->vfs = NULL; // indicate a closed file
+        if (res < 0) {
+            *errcode = -res;
+            return MP_STREAM_ERROR;
+        }
+        return 0;
+    } else {
+        *errcode = MP_EINVAL;
+        return MP_STREAM_ERROR;
+    }
+}
+
+STATIC const mp_rom_map_elem_t MP_VFS_LFSx(file_locals_dict_table)[] = {
+    { MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) },
+    { MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) },
+    { MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj) },
+    { MP_ROM_QSTR(MP_QSTR_readlines), MP_ROM_PTR(&mp_stream_unbuffered_readlines_obj) },
+    { MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },
+    { MP_ROM_QSTR(MP_QSTR_flush), MP_ROM_PTR(&mp_stream_flush_obj) },
+    { MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&mp_stream_close_obj) },
+    { MP_ROM_QSTR(MP_QSTR_seek), MP_ROM_PTR(&mp_stream_seek_obj) },
+    { MP_ROM_QSTR(MP_QSTR_tell), MP_ROM_PTR(&mp_stream_tell_obj) },
+    { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&mp_stream_close_obj) },
+    { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&mp_identity_obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&MP_VFS_LFSx(file___exit___obj)) },
+};
+STATIC MP_DEFINE_CONST_DICT(MP_VFS_LFSx(file_locals_dict), MP_VFS_LFSx(file_locals_dict_table));
+
+#if MICROPY_PY_IO_FILEIO
+STATIC const mp_stream_p_t MP_VFS_LFSx(fileio_stream_p) = {
+    MP_PROTO_IMPLEMENT(MP_QSTR_protocol_stream)
+    .read = MP_VFS_LFSx(file_read),
+    .write = MP_VFS_LFSx(file_write),
+    .ioctl = MP_VFS_LFSx(file_ioctl),
+};
+
+const mp_obj_type_t MP_TYPE_VFS_LFSx_(_fileio) = {
+    { &mp_type_type },
+    .flags = MP_TYPE_FLAG_EXTENDED,
+    .name = MP_QSTR_FileIO,
+    .print = MP_VFS_LFSx(file_print),
+    .locals_dict = (mp_obj_dict_t *)&MP_VFS_LFSx(file_locals_dict),
+    MP_TYPE_EXTENDED_FIELDS(
+        .getiter = mp_identity_getiter,
+        .iternext = mp_stream_unbuffered_iter,
+        .protocol = &MP_VFS_LFSx(fileio_stream_p),
+        ),
+};
+#endif
+
+STATIC const mp_stream_p_t MP_VFS_LFSx(textio_stream_p) = {
+    MP_PROTO_IMPLEMENT(MP_QSTR_protocol_stream)
+    .read = MP_VFS_LFSx(file_read),
+    .write = MP_VFS_LFSx(file_write),
+    .ioctl = MP_VFS_LFSx(file_ioctl),
+    .is_text = true,
+};
+
+const mp_obj_type_t MP_TYPE_VFS_LFSx_(_textio) = {
+    { &mp_type_type },
+    .flags = MP_TYPE_FLAG_EXTENDED,
+    .name = MP_QSTR_TextIOWrapper,
+    .print = MP_VFS_LFSx(file_print),
+    .locals_dict = (mp_obj_dict_t *)&MP_VFS_LFSx(file_locals_dict),
+    MP_TYPE_EXTENDED_FIELDS(
+        .getiter = mp_identity_getiter,
+        .iternext = mp_stream_unbuffered_iter,
+        .protocol = &MP_VFS_LFSx(textio_stream_p),
+        ),
+};