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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
textbuf.h
Debugger text buffering engine.
***************************************************************************/
#ifndef MAME_EMU_DEBUG_TEXTBUF_H
#define MAME_EMU_DEBUG_TEXTBUF_H
#include <memory>
#include "emucore.h"
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
struct text_buffer;
struct text_buffer_line
{
const char *text;
size_t length;
};
// helper class for iterating over the lines of a text_buffer
class text_buffer_lines
{
private:
const text_buffer &m_buffer;
public:
text_buffer_lines(const text_buffer& buffer) : m_buffer(buffer) { }
class text_buffer_line_iterator
{
const text_buffer &m_buffer;
s32 m_lineptr;
public:
text_buffer_line_iterator(const text_buffer &buffer, s32 lineptr) :
m_buffer(buffer),
m_lineptr(lineptr)
{
}
// technically this isn't a valid forward iterator, because operator * doesn't return a reference
text_buffer_line operator*() const;
text_buffer_line_iterator &operator++();
bool operator!=(const text_buffer_line_iterator& rhs)
{
return m_lineptr != rhs.m_lineptr;
}
// according to C++ spec, only != is needed; == is present for completeness.
bool operator==(const text_buffer_line_iterator& rhs) { return !operator!=(rhs); }
};
typedef text_buffer_line_iterator iterator;
typedef text_buffer_line_iterator const iterator_const;
iterator begin() const;
iterator end() const;
};
/***************************************************************************
FUNCTION PROTOTYPES
***************************************************************************/
// free a text buffer
struct text_buffer_deleter { void operator()(text_buffer *text) const; };
using text_buffer_ptr = std::unique_ptr<text_buffer, text_buffer_deleter>;
// allocate a new text buffer
text_buffer_ptr text_buffer_alloc(u32 bytes, u32 lines);
// clear a text buffer
void text_buffer_clear(text_buffer &text);
// "print" data to a text buffer
void text_buffer_print(text_buffer &text, const char *data);
// "print" data to a text buffer with word wrapping to a given column
void text_buffer_print_wrap(text_buffer &text, const char *data, int wrapcol);
// get the maximum width of lines seen so far
u32 text_buffer_max_width(const text_buffer &text);
// get the current number of lines in the buffer
u32 text_buffer_num_lines(const text_buffer &text);
// get an absolute sequence number for a given line
u32 text_buffer_line_index_to_seqnum(const text_buffer &text, u32 index);
// get a sequenced line from the text buffer
const char *text_buffer_get_seqnum_line(const text_buffer &text, u32 seqnum);
#endif // MAME_EMU_DEBUG_TEXTBUF_H
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