-/* Copyright (c) 2015. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2015-2021. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#ifndef SIMGRID_XBT_STRING_HPP
#define SIMGRID_XBT_STRING_HPP
-#include <simgrid_config.h>
+#include <simgrid/config.h>
-#if HAVE_MC
+#include <cstdarg>
+#include <cstdlib>
+#include <string>
-#include <stdexcept>
+#if SIMGRID_HAVE_MC
+
+#include <algorithm>
#include <cstddef>
-#include <cstdlib>
#include <cstring>
-#include <string>
#include <iterator>
+#include <stdexcept>
#include <xbt/sysdep.h>
+#endif
+
namespace simgrid {
namespace xbt {
+/** Create a C++ string from a C-style format
+ *
+ * @ingroup XBT_str
+ */
+XBT_PUBLIC std::string string_printf(const char* fmt, ...);
+
+/** Create a C++ string from a C-style format
+ *
+ * @ingroup XBT_str
+ */
+XBT_PUBLIC std::string string_vprintf(const char* fmt, va_list ap);
+
+#if SIMGRID_HAVE_MC
+
/** POD structure representation of a string
*/
struct string_data {
std::size_t len;
};
-/** A std::string with well-known representation
+/** A std::string-like with well-known representation
*
- * This is a (incomplete) drop-in replacement for `std::string`.
+ * HACK, this is a (incomplete) replacement for `std::string`.
* It has a fixed POD representation (`simgrid::xbt::string_data`)
* which can be used to easily read the string content from another
* process.
* * the [C++11-conforming implementation](https://gcc.gnu.org/gcc-5/changes.html)
* does not use refcouting/COW but has a small string optimization.
*/
-XBT_PUBLIC_CLASS string : private string_data {
- static const char NUL;
-public:
+class XBT_PUBLIC string {
+ static char NUL;
+ string_data str;
+public:
// Types
- typedef std::size_t size_type;
- typedef std::ptrdiff_t difference_type;
- typedef char& reference;
- typedef const char& const_reference;
- typedef char* pointer;
- typedef const char* const_pointer;
- typedef char* iterator;
- typedef const char* const_iterator;
+ using size_type = std::size_t;
+ using reference = char&;
+ using const_reference = const char&;
+ using iterator = char*;
+ using const_iterator = const char*;
// Dtor
~string()
{
- if (string_data::data != &NUL)
- std::free(string_data::data);
+ if (str.data != &NUL)
+ delete[] str.data;
}
// Ctors
string(const char* s, size_t size)
{
if (size == 0) {
- string_data::len = 0;
- string_data::data = const_cast<char*>(&NUL);
+ str.len = 0;
+ str.data = &NUL;
} else {
- string_data::len = size;
- string_data::data = static_cast<char*>(std::malloc(string_data::len + 1));
- memcpy(string_data::data, s, string_data::len);
- string_data::data[string_data::len] = '\0';
+ str.len = size;
+ str.data = new char[str.len + 1];
+ std::copy_n(s, str.len, str.data);
+ str.data[str.len] = '\0';
}
}
- string() : string (nullptr, 0) {}
- string(const char* s)
- : string(s, s == nullptr ? 0 : strlen(s))
- {}
+ string() : string(&NUL, 0) {}
+ explicit string(const char* s) : string(s, strlen(s)) {}
string(string const& s) : string(s.c_str(), s.size()) {}
- string(string&& s)
+ string(string&& s) noexcept : str(s.str)
{
- string_data::len = s.string_data::len;
- string_data::data = s.string_data::data;
- s.string_data::len = 0;
- s.string_data::data = const_cast<char*>(&NUL);
+ s.str.len = 0;
+ s.str.data = &NUL;
}
- string(std::string const& s) : string(s.c_str(), s.size()) {}
+ explicit string(std::string const& s) : string(s.c_str(), s.size()) {}
// Assign
void assign(const char* s, size_t size)
{
- if (string_data::data != &NUL)
- std::free(string_data::data);
- if (size == 0) {
- string_data::len = 0;
- string_data::data = nullptr;
- } else {
- string_data::len = size;
- string_data::data = (char*) std::malloc(string_data::len + 1);
- memcpy(string_data::data, s, string_data::len);
- string_data::data[string_data::len] = '\0';
+ if (str.data != &NUL) {
+ delete[] str.data;
+ str.data = nullptr;
+ str.len = 0;
+ }
+ if (size != 0) {
+ str.len = size;
+ str.data = new char[str.len + 1];
+ std::copy_n(s, str.len, str.data);
+ str.data[str.len] = '\0';
}
}
// Copy
string& operator=(const char* s)
{
- assign(s, s == nullptr ? 0 : std::strlen(s));
+ assign(s, std::strlen(s));
return *this;
}
- string& operator=(string& s)
+ string& operator=(string const& s)
{
- assign(s.c_str(), s.size());
+ if (this != &s)
+ assign(s.c_str(), s.size());
return *this;
}
- string& operator=(std::string& s)
+ string& operator=(std::string const& s)
{
assign(s.c_str(), s.size());
return *this;
}
// Capacity
- size_t size() const { return len; }
- size_t length() const { return len; }
- bool empty() const { return len != 0; }
- void shrink_to_fit() {}
-
- // Alement access
- char* data() { return string_data::data; }
- const char* data() const { return string_data::data; }
- char* c_str() { return string_data::data; }
- const char* c_str() const { return string_data::data; };
+ size_t size() const { return str.len; }
+ size_t length() const { return str.len; }
+ bool empty() const { return str.len != 0; }
+ void shrink_to_fit() { /* Being there, but doing nothing */}
+
+ // Element access
+ char* data() { return str.data; }
+ const char* data() const { return str.data; }
+ char* c_str() { return str.data; }
+ const char* c_str() const { return str.data; };
reference at(size_type i)
{
if (i >= size())
return data()[i];
}
// Conversion
- operator std::string() const
- {
- return std::string(this->c_str(), this->size());
- }
+ static string_data& to_string_data(string& s) { return s.str; }
+ operator std::string() const { return std::string(this->c_str(), this->size()); }
// Iterators
iterator begin() { return data(); }
// Operations
void clear()
{
- string_data::len = 0;
- string_data::data = (char*) &NUL;
+ str.len = 0;
+ str.data = &NUL;
}
- // Compare
- int compare(string const& that) const
+ size_t copy(char* s, size_t len, size_t pos = 0) const
{
- size_t n = std::min(this->size(), that.size());
- int res = memcmp(this->c_str(), that.c_str(), n);
- if (res != 0)
- return res;
- else if (this->size() == that.size())
- return 0;
- else if (this->size() < that.size())
- return -1;
- else
- return 1;
+ if (pos > str.len)
+ throw std::out_of_range(string_printf("xbt::string::copy with pos > size() (%zu > %zu)", pos, str.len));
+ size_t count = std::min(len, str.len - pos);
+ std::copy_n(str.data + pos, count, s);
+ return count;
+ }
+
+ bool equals(const char* data, std::size_t len) const
+ {
+ return this->size() == len
+ && std::memcmp(this->c_str(), data, len) == 0;
}
+
bool operator==(string const& that) const
{
- return this->size() == that.size()
- && std::memcmp(this->c_str(), that.c_str(), this->size()) == 0;
+ return this->equals(that.c_str(), that.size());
}
- bool operator!=(string const& that) const
+ bool operator==(std::string const& that) const
{
- return !(*this == that);
+ return this->equals(that.c_str(), that.size());
}
- bool operator<(string const& that) const
+ bool operator==(const char* that) const
{
- return compare(that) < 0;
+ return this->equals(that, std::strlen(that));
}
- bool operator<=(string const& that) const
+
+ template<class X>
+ bool operator!=(X const& that) const
{
- return compare(that) <= 0;
+ return not (*this == that);
}
- bool operator>(string const& that) const
+
+ // Compare:
+ int compare(const char* data, std::size_t len) const
{
- return compare(that) > 0;
+ size_t n = std::min(this->size(), len);
+ int res = memcmp(this->c_str(), data, n);
+ if (res != 0)
+ return res;
+ else if (this->size() == len)
+ return 0;
+ else if (this->size() < len)
+ return -1;
+ else
+ return 1;
}
- bool operator>=(string const& that) const
+ int compare(string const& that) const
{
- return compare(that) >= 0;
+ return this->compare(that.c_str(), that.size());
}
-
- // Compare with std::string
- bool operator==(std::string const& that) const
+ int compare(std::string const& that) const
{
- return this->size() == that.size()
- && std::memcmp(this->c_str(), that.c_str(), this->size()) == 0;
+ return this->compare(that.c_str(), that.size());
}
- bool operator!=(std::string const& that) const
+ int compare(const char* that) const
{
- return !(*this == that);
+ return this->compare(that, std::strlen(that));
}
- bool operator<(std::string const& that) const
+
+ // Define < <= >= > in term of compare():
+ template<class X>
+ bool operator<(X const& that) const
{
- return compare(that) < 0;
+ return this->compare(that) < 0;
}
- bool operator<=(std::string const& that) const
+ template<class X>
+ bool operator<=(X const& that) const
{
- return compare(that) <= 0;
+ return this->compare(that) <= 0;
}
- bool operator>(std::string const& that) const
+ template<class X>
+ bool operator>(X const& that) const
{
- return compare(that) > 0;
+ return this->compare(that) > 0;
}
- bool operator>=(std::string const& that) const
+ template<class X>
+ bool operator>=(X const& that) const
{
- return compare(that) >= 0;
+ return this->compare(that) >= 0;
}
};
return b <= a;
}
-}
-}
-
#else
-#include <string>
-
-namespace simgrid {
-namespace xbt {
-
typedef std::string string;
+#endif
}
}
#endif
-
-#endif
