tbuffer.h

Software Development in C: A Practical Approach to Programming and Design 软件开发：编程与设计（C））——国外经典教材·计

//---------------------------------------------------------
/*
File Name:	TBuffer.h
Comments:	This file contains the definition of the 
			text_buffer type.
*/
//---------------------------------------------------------



//---------------------------------------------------------
// Constants

#define TBUFFER_LENGTH			50
#define TBUFFER_ROW_LENGTH		40

// End Constants
//---------------------------------------------------------



//---------------------------------------------------------
// Types

typedef struct
{
	char allRows[TBUFFER_LENGTH][TBUFFER_ROW_LENGTH];
	int topLine;
} text_buffer;

// End Types
//---------------------------------------------------------



//---------------------------------------------------------
// Prototypes.

void TextBufferInitialize(text_buffer *tBuffer);
void TextBufferSetRow(int rowNumber,
					  const char * const textString,
					  text_buffer *tBuffer);
void TextBufferGetRow(int rowNumber,
					  char *textString,
					  const text_buffer * const tBuffer);
void TextBufferScrollUp(int linesToScroll,
					    text_buffer *tBuffer);
void TextBufferScrollDown(int linesToScroll,
						  int displayAreaHeight,
						  text_buffer *tBuffer);
int TextBufferGetTopLine(const text_buffer * const tBuffer);


// End Prototypes.
//---------------------------------------------------------



// End TBuffer.h
//---------------------------------------------------------