diff options
Diffstat (limited to 'core/io/file_access.cpp')
| -rw-r--r-- | core/io/file_access.cpp | 677 |
1 files changed, 677 insertions, 0 deletions
diff --git a/core/io/file_access.cpp b/core/io/file_access.cpp new file mode 100644 index 0000000000..e6e79dff8a --- /dev/null +++ b/core/io/file_access.cpp @@ -0,0 +1,677 @@ +/*************************************************************************/ +/* file_access.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */ +/* */ +/* 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 "file_access.h" + +#include "core/config/project_settings.h" +#include "core/crypto/crypto_core.h" +#include "core/io/file_access_pack.h" +#include "core/io/marshalls.h" +#include "core/os/os.h" + +FileAccess::CreateFunc FileAccess::create_func[ACCESS_MAX] = { nullptr, nullptr }; + +FileAccess::FileCloseFailNotify FileAccess::close_fail_notify = nullptr; + +bool FileAccess::backup_save = false; + +FileAccess *FileAccess::create(AccessType p_access) { + ERR_FAIL_INDEX_V(p_access, ACCESS_MAX, nullptr); + + FileAccess *ret = create_func[p_access](); + ret->_set_access_type(p_access); + return ret; +} + +bool FileAccess::exists(const String &p_name) { + if (PackedData::get_singleton() && !PackedData::get_singleton()->is_disabled() && PackedData::get_singleton()->has_path(p_name)) { + return true; + } + + FileAccess *f = open(p_name, READ); + if (!f) { + return false; + } + memdelete(f); + return true; +} + +void FileAccess::_set_access_type(AccessType p_access) { + _access_type = p_access; +} + +FileAccess *FileAccess::create_for_path(const String &p_path) { + FileAccess *ret = nullptr; + if (p_path.begins_with("res://")) { + ret = create(ACCESS_RESOURCES); + } else if (p_path.begins_with("user://")) { + ret = create(ACCESS_USERDATA); + + } else { + ret = create(ACCESS_FILESYSTEM); + } + + return ret; +} + +Error FileAccess::reopen(const String &p_path, int p_mode_flags) { + return _open(p_path, p_mode_flags); +} + +FileAccess *FileAccess::open(const String &p_path, int p_mode_flags, Error *r_error) { + //try packed data first + + FileAccess *ret = nullptr; + if (!(p_mode_flags & WRITE) && PackedData::get_singleton() && !PackedData::get_singleton()->is_disabled()) { + ret = PackedData::get_singleton()->try_open_path(p_path); + if (ret) { + if (r_error) { + *r_error = OK; + } + return ret; + } + } + + ret = create_for_path(p_path); + Error err = ret->_open(p_path, p_mode_flags); + + if (r_error) { + *r_error = err; + } + if (err != OK) { + memdelete(ret); + ret = nullptr; + } + + return ret; +} + +FileAccess::CreateFunc FileAccess::get_create_func(AccessType p_access) { + return create_func[p_access]; +} + +String FileAccess::fix_path(const String &p_path) const { + //helper used by file accesses that use a single filesystem + + String r_path = p_path.replace("\\", "/"); + + switch (_access_type) { + case ACCESS_RESOURCES: { + if (ProjectSettings::get_singleton()) { + if (r_path.begins_with("res://")) { + String resource_path = ProjectSettings::get_singleton()->get_resource_path(); + if (resource_path != "") { + return r_path.replace("res:/", resource_path); + } + return r_path.replace("res://", ""); + } + } + + } break; + case ACCESS_USERDATA: { + if (r_path.begins_with("user://")) { + String data_dir = OS::get_singleton()->get_user_data_dir(); + if (data_dir != "") { + return r_path.replace("user:/", data_dir); + } + return r_path.replace("user://", ""); + } + + } break; + case ACCESS_FILESYSTEM: { + return r_path; + } break; + case ACCESS_MAX: + break; // Can't happen, but silences warning + } + + return r_path; +} + +/* these are all implemented for ease of porting, then can later be optimized */ + +uint16_t FileAccess::get_16() const { + uint16_t res; + uint8_t a, b; + + a = get_8(); + b = get_8(); + + if (big_endian) { + SWAP(a, b); + } + + res = b; + res <<= 8; + res |= a; + + return res; +} + +uint32_t FileAccess::get_32() const { + uint32_t res; + uint16_t a, b; + + a = get_16(); + b = get_16(); + + if (big_endian) { + SWAP(a, b); + } + + res = b; + res <<= 16; + res |= a; + + return res; +} + +uint64_t FileAccess::get_64() const { + uint64_t res; + uint32_t a, b; + + a = get_32(); + b = get_32(); + + if (big_endian) { + SWAP(a, b); + } + + res = b; + res <<= 32; + res |= a; + + return res; +} + +float FileAccess::get_float() const { + MarshallFloat m; + m.i = get_32(); + return m.f; +} + +real_t FileAccess::get_real() const { + if (real_is_double) { + return get_double(); + } else { + return get_float(); + } +} + +double FileAccess::get_double() const { + MarshallDouble m; + m.l = get_64(); + return m.d; +} + +String FileAccess::get_token() const { + CharString token; + + char32_t c = get_8(); + + while (!eof_reached()) { + if (c <= ' ') { + if (token.length()) { + break; + } + } else { + token += c; + } + c = get_8(); + } + + return String::utf8(token.get_data()); +} + +class CharBuffer { + Vector<char> vector; + char stack_buffer[256]; + + char *buffer = nullptr; + int capacity = 0; + int written = 0; + + bool grow() { + if (vector.resize(next_power_of_2(1 + written)) != OK) { + return false; + } + + if (buffer == stack_buffer) { // first chunk? + + for (int i = 0; i < written; i++) { + vector.write[i] = stack_buffer[i]; + } + } + + buffer = vector.ptrw(); + capacity = vector.size(); + ERR_FAIL_COND_V(written >= capacity, false); + + return true; + } + +public: + _FORCE_INLINE_ CharBuffer() : + buffer(stack_buffer), + capacity(sizeof(stack_buffer) / sizeof(char)) { + } + + _FORCE_INLINE_ void push_back(char c) { + if (written >= capacity) { + ERR_FAIL_COND(!grow()); + } + + buffer[written++] = c; + } + + _FORCE_INLINE_ const char *get_data() const { + return buffer; + } +}; + +String FileAccess::get_line() const { + CharBuffer line; + + char32_t c = get_8(); + + while (!eof_reached()) { + if (c == '\n' || c == '\0') { + line.push_back(0); + return String::utf8(line.get_data()); + } else if (c != '\r') { + line.push_back(c); + } + + c = get_8(); + } + line.push_back(0); + return String::utf8(line.get_data()); +} + +Vector<String> FileAccess::get_csv_line(const String &p_delim) const { + ERR_FAIL_COND_V_MSG(p_delim.length() != 1, Vector<String>(), "Only single character delimiters are supported to parse CSV lines."); + ERR_FAIL_COND_V_MSG(p_delim[0] == '"', Vector<String>(), "The double quotation mark character (\") is not supported as a delimiter for CSV lines."); + + String line; + + // CSV can support entries with line breaks as long as they are enclosed + // in double quotes. So our "line" might be more than a single line in the + // text file. + int qc = 0; + do { + if (eof_reached()) { + break; + } + line += get_line() + "\n"; + qc = 0; + for (int i = 0; i < line.length(); i++) { + if (line[i] == '"') { + qc++; + } + } + } while (qc % 2); + + // Remove the extraneous newline we've added above. + line = line.substr(0, line.length() - 1); + + Vector<String> strings; + + bool in_quote = false; + String current; + for (int i = 0; i < line.length(); i++) { + char32_t c = line[i]; + // A delimiter ends the current entry, unless it's in a quoted string. + if (!in_quote && c == p_delim[0]) { + strings.push_back(current); + current = String(); + } else if (c == '"') { + // Doubled quotes are escapes for intentional quotes in the string. + if (line[i + 1] == '"' && in_quote) { + current += '"'; + i++; + } else { + in_quote = !in_quote; + } + } else { + current += c; + } + } + strings.push_back(current); + + return strings; +} + +uint64_t FileAccess::get_buffer(uint8_t *p_dst, uint64_t p_length) const { + ERR_FAIL_COND_V(!p_dst && p_length > 0, -1); + + uint64_t i = 0; + for (i = 0; i < p_length && !eof_reached(); i++) { + p_dst[i] = get_8(); + } + + return i; +} + +String FileAccess::get_as_utf8_string() const { + Vector<uint8_t> sourcef; + uint64_t len = get_length(); + sourcef.resize(len + 1); + + uint8_t *w = sourcef.ptrw(); + uint64_t r = get_buffer(w, len); + ERR_FAIL_COND_V(r != len, String()); + w[len] = 0; + + String s; + if (s.parse_utf8((const char *)w)) { + return String(); + } + return s; +} + +void FileAccess::store_16(uint16_t p_dest) { + uint8_t a, b; + + a = p_dest & 0xFF; + b = p_dest >> 8; + + if (big_endian) { + SWAP(a, b); + } + + store_8(a); + store_8(b); +} + +void FileAccess::store_32(uint32_t p_dest) { + uint16_t a, b; + + a = p_dest & 0xFFFF; + b = p_dest >> 16; + + if (big_endian) { + SWAP(a, b); + } + + store_16(a); + store_16(b); +} + +void FileAccess::store_64(uint64_t p_dest) { + uint32_t a, b; + + a = p_dest & 0xFFFFFFFF; + b = p_dest >> 32; + + if (big_endian) { + SWAP(a, b); + } + + store_32(a); + store_32(b); +} + +void FileAccess::store_real(real_t p_real) { + if (sizeof(real_t) == 4) { + store_float(p_real); + } else { + store_double(p_real); + } +} + +void FileAccess::store_float(float p_dest) { + MarshallFloat m; + m.f = p_dest; + store_32(m.i); +} + +void FileAccess::store_double(double p_dest) { + MarshallDouble m; + m.d = p_dest; + store_64(m.l); +} + +uint64_t FileAccess::get_modified_time(const String &p_file) { + if (PackedData::get_singleton() && !PackedData::get_singleton()->is_disabled() && (PackedData::get_singleton()->has_path(p_file) || PackedData::get_singleton()->has_directory(p_file))) { + return 0; + } + + FileAccess *fa = create_for_path(p_file); + ERR_FAIL_COND_V_MSG(!fa, 0, "Cannot create FileAccess for path '" + p_file + "'."); + + uint64_t mt = fa->_get_modified_time(p_file); + memdelete(fa); + return mt; +} + +uint32_t FileAccess::get_unix_permissions(const String &p_file) { + if (PackedData::get_singleton() && !PackedData::get_singleton()->is_disabled() && (PackedData::get_singleton()->has_path(p_file) || PackedData::get_singleton()->has_directory(p_file))) { + return 0; + } + + FileAccess *fa = create_for_path(p_file); + ERR_FAIL_COND_V_MSG(!fa, 0, "Cannot create FileAccess for path '" + p_file + "'."); + + uint32_t mt = fa->_get_unix_permissions(p_file); + memdelete(fa); + return mt; +} + +Error FileAccess::set_unix_permissions(const String &p_file, uint32_t p_permissions) { + if (PackedData::get_singleton() && !PackedData::get_singleton()->is_disabled() && (PackedData::get_singleton()->has_path(p_file) || PackedData::get_singleton()->has_directory(p_file))) { + return ERR_UNAVAILABLE; + } + + FileAccess *fa = create_for_path(p_file); + ERR_FAIL_COND_V_MSG(!fa, ERR_CANT_CREATE, "Cannot create FileAccess for path '" + p_file + "'."); + + Error err = fa->_set_unix_permissions(p_file, p_permissions); + memdelete(fa); + return err; +} + +void FileAccess::store_string(const String &p_string) { + if (p_string.length() == 0) { + return; + } + + CharString cs = p_string.utf8(); + store_buffer((uint8_t *)&cs[0], cs.length()); +} + +void FileAccess::store_pascal_string(const String &p_string) { + CharString cs = p_string.utf8(); + store_32(cs.length()); + store_buffer((uint8_t *)&cs[0], cs.length()); +} + +String FileAccess::get_pascal_string() { + uint32_t sl = get_32(); + CharString cs; + cs.resize(sl + 1); + get_buffer((uint8_t *)cs.ptr(), sl); + cs[sl] = 0; + + String ret; + ret.parse_utf8(cs.ptr()); + + return ret; +} + +void FileAccess::store_line(const String &p_line) { + store_string(p_line); + store_8('\n'); +} + +void FileAccess::store_csv_line(const Vector<String> &p_values, const String &p_delim) { + ERR_FAIL_COND(p_delim.length() != 1); + + String line = ""; + int size = p_values.size(); + for (int i = 0; i < size; ++i) { + String value = p_values[i]; + + if (value.find("\"") != -1 || value.find(p_delim) != -1 || value.find("\n") != -1) { + value = "\"" + value.replace("\"", "\"\"") + "\""; + } + if (i < size - 1) { + value += p_delim; + } + + line += value; + } + + store_line(line); +} + +void FileAccess::store_buffer(const uint8_t *p_src, uint64_t p_length) { + ERR_FAIL_COND(!p_src && p_length > 0); + for (uint64_t i = 0; i < p_length; i++) { + store_8(p_src[i]); + } +} + +Vector<uint8_t> FileAccess::get_file_as_array(const String &p_path, Error *r_error) { + FileAccess *f = FileAccess::open(p_path, READ, r_error); + if (!f) { + if (r_error) { // if error requested, do not throw error + return Vector<uint8_t>(); + } + ERR_FAIL_V_MSG(Vector<uint8_t>(), "Can't open file from path '" + String(p_path) + "'."); + } + Vector<uint8_t> data; + data.resize(f->get_length()); + f->get_buffer(data.ptrw(), data.size()); + memdelete(f); + return data; +} + +String FileAccess::get_file_as_string(const String &p_path, Error *r_error) { + Error err; + Vector<uint8_t> array = get_file_as_array(p_path, &err); + if (r_error) { + *r_error = err; + } + if (err != OK) { + if (r_error) { + return String(); + } + ERR_FAIL_V_MSG(String(), "Can't get file as string from path '" + String(p_path) + "'."); + } + + String ret; + ret.parse_utf8((const char *)array.ptr(), array.size()); + return ret; +} + +String FileAccess::get_md5(const String &p_file) { + FileAccess *f = FileAccess::open(p_file, READ); + if (!f) { + return String(); + } + + CryptoCore::MD5Context ctx; + ctx.start(); + + unsigned char step[32768]; + + while (true) { + uint64_t br = f->get_buffer(step, 32768); + if (br > 0) { + ctx.update(step, br); + } + if (br < 4096) { + break; + } + } + + unsigned char hash[16]; + ctx.finish(hash); + + memdelete(f); + + return String::md5(hash); +} + +String FileAccess::get_multiple_md5(const Vector<String> &p_file) { + CryptoCore::MD5Context ctx; + ctx.start(); + + for (int i = 0; i < p_file.size(); i++) { + FileAccess *f = FileAccess::open(p_file[i], READ); + ERR_CONTINUE(!f); + + unsigned char step[32768]; + + while (true) { + uint64_t br = f->get_buffer(step, 32768); + if (br > 0) { + ctx.update(step, br); + } + if (br < 4096) { + break; + } + } + memdelete(f); + } + + unsigned char hash[16]; + ctx.finish(hash); + + return String::md5(hash); +} + +String FileAccess::get_sha256(const String &p_file) { + FileAccess *f = FileAccess::open(p_file, READ); + if (!f) { + return String(); + } + + CryptoCore::SHA256Context ctx; + ctx.start(); + + unsigned char step[32768]; + + while (true) { + uint64_t br = f->get_buffer(step, 32768); + if (br > 0) { + ctx.update(step, br); + } + if (br < 4096) { + break; + } + } + + unsigned char hash[32]; + ctx.finish(hash); + + memdelete(f); + return String::hex_encode_buffer(hash, 32); +} |