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More stream enhancement

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This commit is contained in:
Vas Crabb 2016-03-03 03:52:21 +11:00
parent 42ea682852
commit ed88fd30a1
2 changed files with 34 additions and 12 deletions
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5
src/emu/debug/dvdisasm.cpp
View File

@ -370,10 +370,7 @@ bool debug_view_disasm::recompute(offs_t pc, int startline, int lines)
// allocate disassembly buffer
const auto total_bytes = m_total.x * m_total.y;
m_dasm.reserve(total_bytes);
const auto current_bytes = m_dasm.seekp(0, util::ovectorstream::end).tellp();
if (current_bytes < util::ovectorstream::pos_type(total_bytes))
util::stream_format(m_dasm, "%*s", total_bytes - int(current_bytes), "");
m_dasm.reserve(total_bytes).seekp(total_bytes);
// iterate over lines
for (int line = 0; line < lines; line++)

41
src/lib/util/vecstream.h
View File

@ -17,6 +17,7 @@
#ifndef __MAME_UTIL_VECSTREAM_H__
#define __MAME_UTIL_VECSTREAM_H__
#include <algorithm>
#include <cassert>
#include <ostream>
#include <streambuf>
@ -26,6 +27,7 @@
#include <vector>
namespace util {
template <typename CharT, typename Traits = std::char_traits<CharT>, typename Allocator = std::allocator<CharT> >
class basic_vectorbuf : public std::basic_streambuf<CharT, Traits>
{
@ -99,6 +101,14 @@ public:
setup();
}
void swap(basic_vectorbuf &that)
{
std::basic_streambuf<CharT, Traits>::swap(that);
std::swap(m_mode, that.m_mode);
m_storage.swap(that.m_storage);
std::swap(m_threshold, that.m_threshold);
}
void reserve(typename vector_type::size_type size)
{
if ((m_mode & std::ios_base::out) && (m_storage.size() < size))
@ -155,13 +165,22 @@ protected:
default:
return pos_type(off_type(-1));
}
if ((off_type(0) > off) || (end < off) || ((m_mode & std::ios_base::app) && out && (end != off)))
return pos_type(off_type(-1));
if (in) this->setg(this->eback(), this->eback() + off, this->egptr());
if ((off_type(0) > off) || ((m_mode & std::ios_base::app) && out && (end != off))) return pos_type(off_type(-1));
if ((out ? off_type(this->epptr() - this->pbase()) : end) < off) return pos_type(off_type(-1));
if (out)
{
this->setp(this->pbase(), this->epptr());
this->pbump(off);
if (m_threshold < this->pptr()) m_threshold = this->pptr();
if (m_mode & std::ios_base::in)
{
if (in) this->setg(this->eback(), this->eback() + off, m_threshold);
else if (this->egptr() < m_threshold) this->setg(this->eback(), this->gptr(), m_threshold);
}
}
else if (in)
{
this->setg(this->eback(), this->eback() + off, this->egptr());
}
return pos_type(off);
}
@ -300,7 +319,9 @@ public:
vector_type const &vec() const { return rdbuf()->vec(); }
void vec(const vector_type &content) { rdbuf()->vec(content); }
void vec(vector_type &&content) { rdbuf()->vec(std::move(content)); }
void clear() { rdbuf()->clear(); }
basic_ivectorstream &clear() { rdbuf()->clear(); return *this; }
void swap(basic_ivectorstream &that) { std::basic_istream<CharT, Traits>::swap(that); rdbuf()->swap(*that.rdbuf()); }
private:
basic_vectorbuf<CharT, Traits, Allocator> m_rdbuf;
@ -321,8 +342,10 @@ public:
vector_type const &vec() const { return rdbuf()->vec(); }
void vec(const vector_type &content) { rdbuf()->vec(content); }
void vec(vector_type &&content) { rdbuf()->vec(std::move(content)); }
void clear() { rdbuf()->clear(); }
void reserve(typename vector_type::size_type size) { rdbuf()->reserve(size); }
basic_ovectorstream &clear() { rdbuf()->clear(); return *this; }
basic_ovectorstream &reserve(typename vector_type::size_type size) { rdbuf()->reserve(size); return *this; }
void swap(basic_ovectorstream &that) { std::basic_ostream<CharT, Traits>::swap(that); rdbuf()->swap(*that.rdbuf()); }
private:
basic_vectorbuf<CharT, Traits, Allocator> m_rdbuf;
@ -343,8 +366,10 @@ public:
vector_type const &vec() const { return rdbuf()->vec(); }
void vec(const vector_type &content) { rdbuf()->vec(content); }
void vec(vector_type &&content) { rdbuf()->vec(std::move(content)); }
void clear() { rdbuf()->clear(); }
void reserve(typename vector_type::size_type size) { rdbuf()->reserve(size); }
basic_vectorstream &clear() { rdbuf()->clear(); return *this; }
basic_vectorstream &reserve(typename vector_type::size_type size) { rdbuf()->reserve(size); return *this; }
void swap(basic_vectorstream &that) { std::basic_iostream<CharT, Traits>::swap(that); rdbuf()->swap(*that.rdbuf()); }
private:
basic_vectorbuf<CharT, Traits, Allocator> m_rdbuf;