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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2015 Paul Sokolovsky
* Copyright (c) 2016 Damien P. George
* Copyright (c) 2021 Jim Mussared
*
* 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 <string.h>
#include <stdint.h>
#include "py/lexer.h"
#include "py/frozenmod.h"
#if MICROPY_MODULE_FROZEN
// Null-separated frozen file names. All string-type entries are listed first,
// followed by mpy-type entries. Use mp_frozen_str_sizes to determine how
// many string entries.
extern const char mp_frozen_names[];
#if MICROPY_MODULE_FROZEN_STR
#ifndef MICROPY_MODULE_FROZEN_LEXER
#define MICROPY_MODULE_FROZEN_LEXER mp_lexer_new_from_str_len
#else
mp_lexer_t *MICROPY_MODULE_FROZEN_LEXER(qstr src_name, const char *str, mp_uint_t len, mp_uint_t free_len);
#endif
// Size in bytes of each string entry, followed by a zero (terminator).
extern const uint32_t mp_frozen_str_sizes[];
// Null-separated string content.
extern const char mp_frozen_str_content[];
#endif // MICROPY_MODULE_FROZEN_STR
#if MICROPY_MODULE_FROZEN_MPY
#include "py/emitglue.h"
extern const mp_frozen_module_t *const mp_frozen_mpy_content[];
#endif // MICROPY_MODULE_FROZEN_MPY
// Search for "str" as a frozen entry, returning the stat result
// (no-exist/file/dir), as well as the type (none/str/mpy) and data.
// frozen_type can be NULL if its value isn't needed (and then data is assumed to be NULL).
mp_import_stat_t mp_find_frozen_module(const char *str, int *frozen_type, void **data) {
size_t len = strlen(str);
const char *name = mp_frozen_names;
if (frozen_type != NULL) {
*frozen_type = MP_FROZEN_NONE;
}
// Count the number of str lengths we have to find how many str entries.
size_t num_str = 0;
#if MICROPY_MODULE_FROZEN_STR && MICROPY_MODULE_FROZEN_MPY
for (const uint32_t *s = mp_frozen_str_sizes; *s != 0; ++s) {
++num_str;
}
#endif
for (size_t i = 0; *name != 0; i++) {
size_t entry_len = strlen(name);
if (entry_len >= len && memcmp(str, name, len) == 0) {
// Query is a prefix of the current entry.
if (entry_len == len) {
// Exact match --> file.
if (frozen_type != NULL) {
#if MICROPY_MODULE_FROZEN_STR
if (i < num_str) {
*frozen_type = MP_FROZEN_STR;
// Use the size table to figure out where this index starts.
size_t offset = 0;
for (size_t j = 0; j < i; ++j) {
offset += mp_frozen_str_sizes[j] + 1;
}
size_t content_len = mp_frozen_str_sizes[i];
const char *content = &mp_frozen_str_content[offset];
// Note: str & len have been updated by find_frozen_entry to strip
// the ".frozen/" prefix (to avoid this being a distinct qstr to
// the original path QSTR in frozen_content.c).
qstr source = qstr_from_strn(str, len);
mp_lexer_t *lex = MICROPY_MODULE_FROZEN_LEXER(source, content, content_len, 0);
*data = lex;
}
#endif
#if MICROPY_MODULE_FROZEN_MPY
if (i >= num_str) {
*frozen_type = MP_FROZEN_MPY;
// Load the corresponding index as a raw_code, taking
// into account any string entries to offset by.
*data = (void *)mp_frozen_mpy_content[i - num_str];
}
#endif
}
return MP_IMPORT_STAT_FILE;
} else if (name[len] == '/') {
// Matches up to directory separator, this is a valid
// directory path.
return MP_IMPORT_STAT_DIR;
}
}
// Skip null separator.
name += entry_len + 1;
}
return MP_IMPORT_STAT_NO_EXIST;
}
#endif // MICROPY_MODULE_FROZEN
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