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Mini Shell
Mini Shell
/*
+----------------------------------------------------------------------+
| Swoole |
+----------------------------------------------------------------------+
| This source file is subject to version 2.0 of the Apache license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.apache.org/licenses/LICENSE-2.0.html |
| If you did not receive a copy of the Apache2.0 license and are unable|
| to obtain it through the world-wide-web, please send a note to |
| license@swoole.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Tianfeng Han <rango@swoole.com> |
| Twosee <twose@qq.com> |
+----------------------------------------------------------------------+
*/
#pragma once
#include "swoole.h"
#include <string>
#define SW_STRINGL(s) s->str, s->length
#define SW_STRINGS(s) s->str, s->size
#define SW_STRINGCVL(s) s->str + s->offset, s->length - s->offset
namespace swoole {
typedef std::function<bool(const char *, size_t)> StringExplodeHandler;
class String {
private:
void alloc(size_t _size, const Allocator *_allocator) {
if (_allocator == nullptr) {
_allocator = sw_std_allocator();
}
_size = SW_MEM_ALIGNED_SIZE(_size);
length = 0;
size = _size;
offset = 0;
str = (char *) _allocator->malloc(_size);
allocator = _allocator;
if (str == nullptr) {
throw std::bad_alloc();
}
}
void move(String &&src) {
str = src.str;
length = src.length;
offset = src.offset;
size = src.size;
allocator = src.allocator;
src.str = nullptr;
src.length = 0;
src.size = 0;
src.offset = 0;
}
public:
size_t length;
size_t size;
off_t offset;
char *str;
const Allocator *allocator;
String() {
length = size = offset = 0;
str = nullptr;
allocator = nullptr;
}
explicit String(size_t _size, const Allocator *_allocator = nullptr) {
alloc(_size, _allocator);
}
String(const char *_str, size_t _length) {
alloc(_length + 1, nullptr);
memcpy(str, _str, _length);
str[_length] = '\0';
length = _length;
}
String(const std::string &_str) : String(_str.c_str(), _str.length()) {}
String(String &_str) {
alloc(_str.size, _str.allocator);
memcpy(_str.str, str, _str.length);
length = _str.length;
offset = _str.offset;
}
String(String &&src) {
move(std::move(src));
}
String &operator=(String &src) {
if (&src == this) {
return *this;
}
if (allocator && str) {
allocator->free(str);
}
alloc(src.size, src.allocator);
memcpy(src.str, str, src.length);
length = src.length;
offset = src.offset;
return *this;
}
String &operator=(String &&src) {
if (&src == this) {
return *this;
}
if (allocator && str) {
allocator->free(str);
}
move(std::move(src));
return *this;
}
~String() {
if (allocator && str) {
allocator->free(str);
}
}
char *value() {
return str;
}
size_t get_length() {
return length;
}
size_t capacity() {
return size;
}
std::string to_std_string() {
return std::string(str, length);
}
bool contains(const char *needle, size_t l_needle) {
return swoole_strnstr(str, length, needle, l_needle) != nullptr;
}
bool contains(const std::string &needle) {
return contains(needle.c_str(), needle.size());
}
bool grow(size_t incr_value) {
length += incr_value;
if (length == size && !reserve(size * 2)) {
return false;
} else {
return true;
}
}
String *substr(size_t offset, size_t len) {
if (offset + len > length) {
return nullptr;
}
auto _substr = new String(len);
_substr->append(str + offset, len);
return _substr;
}
bool empty() {
return str == nullptr || length == 0;
}
void clear() {
length = 0;
offset = 0;
}
bool extend() {
return extend(size * 2);
}
bool extend(size_t new_size) {
assert(new_size > size);
return reserve(new_size);
}
bool extend_align(size_t _new_size) {
size_t align_size = SW_MEM_ALIGNED_SIZE(size * 2);
while (align_size < _new_size) {
align_size *= 2;
}
return reserve(align_size);
}
bool reserve(size_t new_size);
bool repeat(const char *data, size_t len, size_t n);
int append(const char *append_str, size_t length);
int append(const std::string &append_str) {
return append(append_str.c_str(), append_str.length());
}
int append(char c) {
return append(&c, sizeof(c));
}
int append(const String &append_str) {
size_t new_size = length + append_str.length;
if (new_size > size) {
if (!reserve(new_size)) {
return SW_ERR;
}
}
memcpy(str + length, append_str.str, append_str.length);
length += append_str.length;
return SW_OK;
}
void write(off_t _offset, String *write_str) {
size_t new_length = _offset + write_str->length;
if (new_length > size) {
reserve(swoole_size_align(new_length * 2, swoole_pagesize()));
}
memcpy(str + _offset, write_str->str, write_str->length);
if (new_length > length) {
length = new_length;
}
}
void write(off_t _offset, const char *write_str, size_t _length) {
size_t new_length = _offset + _length;
if (new_length > size) {
reserve(swoole_size_align(new_length * 2, swoole_pagesize()));
}
memcpy(str + _offset, write_str, _length);
if (new_length > length) {
length = new_length;
}
}
int append(int value);
ssize_t split(const char *delimiter, size_t delimiter_length, const StringExplodeHandler &handler);
int append_random_bytes(size_t length, bool base64 = false);
void print(bool print_value = true);
enum FormatFlag {
FORMAT_APPEND = 1 << 0,
FORMAT_GROW = 1 << 1,
};
template <typename... Args>
size_t format_impl(int flags, const char *format, Args... args) {
size_t _size = sw_snprintf(nullptr, 0, format, args...);
if (_size == 0) {
return 0;
}
// store \0 terminator
_size++;
size_t new_size = (flags & FORMAT_APPEND) ? length + _size : _size;
if (flags & FORMAT_GROW) {
size_t align_size = SW_MEM_ALIGNED_SIZE(size * 2);
while (align_size < new_size) {
align_size *= 2;
}
new_size = align_size;
}
size_t n;
if (flags & FORMAT_APPEND) {
if (_size > size - length && !reserve(new_size)) {
return 0;
}
n = sw_snprintf(str + length, size - length, format, args...);
length += n;
} else {
if (_size > size && !reserve(new_size)) {
return 0;
}
n = sw_snprintf(str, size, format, args...);
length = n;
}
return n;
}
template <typename... Args>
size_t format(const char *format, Args... args) {
return format_impl(0, format, args...);
}
char *pop(size_t init_size);
void reduce(off_t offset);
};
inline String *make_string(size_t size, const Allocator *allocator = nullptr) {
return new String(size, allocator);
}
} // namespace swoole
Zerion Mini Shell 1.0