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Export app::readable_file for API use

This commit is contained in:
kayomn 2023-02-20 16:12:29 +00:00
parent 685e09412b
commit 37b2586eaa
1 changed files with 70 additions and 68 deletions
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138
source/app.cpp
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@ -11,90 +11,92 @@ import coral.math;
import oar; import oar;
struct file_reader : public coral::file_reader { namespace app {
enum class [[nodiscard]] close_result { struct file_reader : public coral::file_reader {
ok, enum class [[nodiscard]] close_result {
io_unavailable, ok,
}; io_unavailable,
};
enum class [[nodiscard]] open_result { enum class [[nodiscard]] open_result {
ok, ok,
io_unavailable, io_unavailable,
access_denied, access_denied,
not_found, not_found,
}; };
file_reader(coral::fs * fs) : rw_ops{nullptr} { file_reader(coral::fs * fs) : rw_ops{nullptr} {
this->fs = fs; this->fs = fs;
}
close_result close() {
if (::SDL_RWclose(this->rw_ops) != 0) return close_result::io_unavailable;
this->rw_ops = nullptr;
return close_result::ok;
}
bool is_open() const {
return this->rw_ops != nullptr;
}
open_result open(coral::path const & file_path) {
if (this->is_open()) switch (this->close()) {
case close_result::ok: break;
case close_result::io_unavailable: return open_result::io_unavailable;
default: coral::unreachable();
} }
this->rw_ops = ::SDL_RWFromFile(reinterpret_cast<char const *>(this->path_buffer), "r"); close_result close() {
if (::SDL_RWclose(this->rw_ops) != 0) return close_result::io_unavailable;
if (this->rw_ops == nullptr) return open_result::not_found; this->rw_ops = nullptr;
return open_result::ok; return close_result::ok;
} }
coral::expected<coral::usize, coral::io_error> read(coral::slice<coral::u8> const & buffer) override { bool is_open() const {
if (!this->is_open()) return coral::io_error::unavailable; return this->rw_ops != nullptr;
}
coral::usize const bytes_read{::SDL_RWread(this->rw_ops, buffer.pointer, sizeof(uint8_t), buffer.length)}; open_result open(coral::path const & file_path) {
if (this->is_open()) switch (this->close()) {
case close_result::ok: break;
case close_result::io_unavailable: return open_result::io_unavailable;
default: coral::unreachable();
}
if ((bytes_read == 0) && (::SDL_GetError() != nullptr)) return coral::io_error::unavailable; this->rw_ops = ::SDL_RWFromFile(reinterpret_cast<char const *>(this->path_buffer), "r");
return bytes_read; if (this->rw_ops == nullptr) return open_result::not_found;
}
coral::expected<coral::u64, coral::io_error> seek(coral::u64 offset) override { return open_result::ok;
if (!this->is_open()) return coral::io_error::unavailable; }
// TODO: Fix cast. coral::expected<coral::usize, coral::io_error> read(coral::slice<coral::u8> const & buffer) override {
coral::i64 const byte_position{ if (!this->is_open()) return coral::io_error::unavailable;
::SDL_RWseek(this->rw_ops, static_cast<coral::i64>(offset), RW_SEEK_SET)};
if (byte_position == -1) return coral::io_error::unavailable; coral::usize const bytes_read{::SDL_RWread(this->rw_ops, buffer.pointer, sizeof(uint8_t), buffer.length)};
return static_cast<coral::u64>(byte_position); if ((bytes_read == 0) && (::SDL_GetError() != nullptr)) return coral::io_error::unavailable;
}
coral::expected<coral::u64, coral::io_error> tell() override { return bytes_read;
if (!this->is_open()) return coral::io_error::unavailable; }
coral::i64 const byte_position{::SDL_RWseek(this->rw_ops, 0, RW_SEEK_SET)}; coral::expected<coral::u64, coral::io_error> seek(coral::u64 offset) override {
if (!this->is_open()) return coral::io_error::unavailable;
if (byte_position == -1) return coral::io_error::unavailable; // TODO: Fix cast.
coral::i64 const byte_position{
::SDL_RWseek(this->rw_ops, static_cast<coral::i64>(offset), RW_SEEK_SET)};
return static_cast<coral::u64>(byte_position); if (byte_position == -1) return coral::io_error::unavailable;
}
private: return static_cast<coral::u64>(byte_position);
static constexpr coral::usize path_max{4096}; }
coral::u8 path_buffer[path_max]; coral::expected<coral::u64, coral::io_error> tell() override {
if (!this->is_open()) return coral::io_error::unavailable;
coral::fs * fs; coral::i64 const byte_position{::SDL_RWseek(this->rw_ops, 0, RW_SEEK_SET)};
::SDL_RWops * rw_ops; if (byte_position == -1) return coral::io_error::unavailable;
};
return static_cast<coral::u64>(byte_position);
}
private:
static constexpr coral::usize path_max{4096};
coral::u8 path_buffer[path_max];
coral::fs * fs;
::SDL_RWops * rw_ops;
};
}
struct base_directory : public coral::fs { struct base_directory : public coral::fs {
base_directory() : directory_path{} { base_directory() : directory_path{} {
@ -122,13 +124,13 @@ struct base_directory : public coral::fs {
void read_file(coral::path const & file_path, coral::callable<void(coral::file_reader &)> const & then) override { void read_file(coral::path const & file_path, coral::callable<void(coral::file_reader &)> const & then) override {
if (this->directory_path.length == 0) return; if (this->directory_path.length == 0) return;
file_reader reader{this}; app::file_reader reader{this};
if (reader.open(file_path) != file_reader::open_result::ok) return; if (reader.open(file_path) != app::file_reader::open_result::ok) return;
then(reader); then(reader);
if (reader.close() != file_reader::close_result::ok) return; if (reader.close() != app::file_reader::close_result::ok) return;
} }
void write_file(coral::path const & file_path, coral::callable<void(coral::file_writer &)> const & then) override { void write_file(coral::path const & file_path, coral::callable<void(coral::file_writer &)> const & then) override {
@ -165,13 +167,13 @@ struct user_directory : public coral::fs {
void read_file(coral::path const & file_path, coral::callable<void(coral::file_reader &)> const & then) override { void read_file(coral::path const & file_path, coral::callable<void(coral::file_reader &)> const & then) override {
if (this->directory_path.length == 0) return; if (this->directory_path.length == 0) return;
file_reader reader{this}; app::file_reader reader{this};
if (reader.open(file_path) != file_reader::open_result::ok) return; if (reader.open(file_path) != app::file_reader::open_result::ok) return;
then(reader); then(reader);
if (reader.close() != file_reader::close_result::ok) return; if (reader.close() != app::file_reader::close_result::ok) return;
} }
void write_file(coral::path const & file_path, coral::callable<void(coral::file_writer &)> const & then) override { void write_file(coral::path const & file_path, coral::callable<void(coral::file_writer &)> const & then) override {