add circuitpython code

1 files changed, 135 insertions, 0 deletions

diff --git a/circuitpython/py/frozenmod.c b/circuitpython/py/frozenmod.c
new file mode 100644
index 0000000..57e9d5d
--- /dev/null
+++ b/circuitpython/py/frozenmod.c
@@ -0,0 +1,135 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015 Paul Sokolovsky
+ * SPDX-FileCopyrightText: Copyright (c) 2016 Damien P. George
+ * SPDX-FileCopyrightText: 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_raw_code_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