?? zlibhelp.c
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/*****************************************************************************/
/* DEMO PROGRAM FOR ZLIB VERSION 1.0 - BROWSE FUNCTION */
/* ------------------------------------------------------------------------- */
/* Author : Shih Ho ( 何 軾 ) */
/* Date : August 14, 1995 */
/*****************************************************************************/
#include <stdio.h>
#include <string.h>
#include <zlib.h>
/*===========================================================================*/
/* Constant Definition */
/*---------------------------------------------------------------------------*/
#define KEY_SIZE 20
#define REF_SIZE 64
#define REF_LINE 13
#define REC_SIZE ( REF_LINE * ( REF_SIZE + 1 ) + ( KEY_SIZE + 1 ) )
#define BROWSE_ROWS 4
#define BROWSE_COLS 3
/*===========================================================================*/
/* Function Definition */
/*---------------------------------------------------------------------------*/
static void DispLine( int );
static int Refresh();
/*===========================================================================*/
/* Data Area */
/*---------------------------------------------------------------------------*/
static FILE *fp; /* Text file handler for IO */
static int RecNo; /* Record number of the first line on screen */
static int RecPtr; /* Being located record number */
static int RecCnt; /* Record count of the text file */
static int RefFlag; /* Refresh flag */
static char Buf[80]; /* String buffer */
/*===========================================================================*/
/* Local Function - Set Record Number */
/*---------------------------------------------------------------------------*/
static int SetRecord( int n )
{
if( n < 0 || n >= RecCnt )
return( -1 );
RecPtr = n;
return( 0 );
}
/*===========================================================================*/
/* Local Function - Display Browse Screen */
/*---------------------------------------------------------------------------*/
static void DispScreen()
{
int i;
ZWprintf( 0, 0,
"┏━━━━━━━━━━┯━━━━━━━━━━┯━━━━━━━━━━┓" );
ZWprintf( 1, 0, "┃%s│%s│%s┃",
" 公用函數(shù)類型及名稱 ", " 公用函數(shù)類型及名稱 ", " 公用函數(shù)類型及名稱 " );
ZWprintf( 2, 0,
"┠──────────┼──────────┼──────────┨" );
for( i = 0; i < BROWSE_ROWS; i ++ )
ZWprintf( i + 3, 0,
"┃%*s│%*s│%*s┃", KEY_SIZE, "", KEY_SIZE, "", KEY_SIZE, "" );
ZWprintf( BROWSE_ROWS + 3, 0,
"┠──────────┴──────────┴──────────┨" );
for( i = 0; i < REF_LINE; i ++ )
ZWprintf( i + BROWSE_ROWS + 4, 0, "┃%-*s┃", REF_SIZE, "" );
ZWprintf( REF_LINE + BROWSE_ROWS + 4, 0,
"┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛" );
}
/*===========================================================================*/
/* Local Function - Display A Key Line */
/*---------------------------------------------------------------------------*/
static int GetLine( int n )
{
if( n == 0 )
RecNo = RecPtr;
return( 0 );
}
/*===========================================================================*/
/* Local Function - Goto Specified Record */
/*---------------------------------------------------------------------------*/
static int SpecLine( int n )
{
return( SetRecord( RecNo + n ) );
}
/*===========================================================================*/
/* Local Function - Goto First Record */
/*---------------------------------------------------------------------------*/
static int FirstLine()
{
return( SetRecord( 0 ) );
}
/*===========================================================================*/
/* Local Function - Goto Last Recrod */
/*---------------------------------------------------------------------------*/
static int LastLine()
{
return( SetRecord( RecCnt - 1 ) );
}
/*===========================================================================*/
/* Local Function - Goto Previous Record */
/*---------------------------------------------------------------------------*/
static int PrevLine()
{
return( SetRecord( RecPtr - 1 ) );
}
/*===========================================================================*/
/* Local Function - Goto Next Record */
/*---------------------------------------------------------------------------*/
static int NextLine()
{
return( SetRecord( RecPtr + 1 ) );
}
/*===========================================================================*/
/* Local Function - Cursor Line Change */
/*---------------------------------------------------------------------------*/
static void CursorChange()
{
RefFlag = 1;
}
/*===========================================================================*/
/* Data Area */
/*---------------------------------------------------------------------------*/
static ZWINDOW Window = {
1, 2, 22, 76, ZW_BOX, " ZLIB公用函數(shù)使用說明 "
};
static ZBUTTON Button[] = {
{ 0, 0, 0, 0, 0, UP, 0, 0 },
{ 0, 0, 0, 0, 0, DOWN, 0, 0 },
{ 0, 0, 0, 0, 0, LEFT, 0, 0 },
{ 0, 0, 0, 0, 0, RIGHT, 0, 0 },
{ 0, 0, 0, 0, 0, HOME, 0, 0 },
{ 0, 0, 0, 0, 0, END, 0, 0 },
{ 0, 0, 0, 0, 0, PGUP, 0, 0 },
{ 0, 0, 0, 0, 0, PGDN, 0, 0 },
{ 1, 69, 1, 6, 0, '8', 0, 0 },
{ 3, 69, 1, 6, 0, '2', 0, 0 },
{ 5, 69, 1, 6, 0, '4', 0, 0 },
{ 7, 69, 1, 6, 0, '6', 0, 0 },
{ 10, 69, 1, 6, 0, '7', 0, 0 },
{ 12, 69, 1, 6, 0, '1', 0, 0 },
{ 14, 69, 1, 6, 0, '9', 0, 0 },
{ 16, 69, 1, 6, 0, '3', 0, 0 },
{ 20, 69, 1, 6, "5-退出", '5', 0, 0 }
};
static ZSCREEN Screen = {
sizeof( Button ) / sizeof( ZBUTTON ), Button, 0, 0, Refresh
};
static ZBROWSE Browse = {
&Window, &Screen, BROWSE_ROWS, BROWSE_COLS, 0, 0,
DispScreen, 0, 0, GetLine, 0, DispLine,
SpecLine, FirstLine, LastLine, PrevLine, NextLine,
0, CursorChange, 0
};
/*===========================================================================*/
/* Local Function - Display A Key Line */
/*---------------------------------------------------------------------------*/
static void DispLine( int n )
{
if( n >= Browse.lc )
strcpy( Buf, "" );
else{
fseek( fp, ( RecNo + n ) * REC_SIZE, SEEK_SET );
fgets( Buf, KEY_SIZE + 1, fp );
}
ZWprintf( n / BROWSE_COLS + 3, ( n % BROWSE_COLS ) * ( KEY_SIZE + 2 ) + 2,
"%-*s", KEY_SIZE, Buf );
}
/*===========================================================================*/
/* Local Function - Refresh Detail */
/*---------------------------------------------------------------------------*/
static int Refresh()
{
int i;
if( RefFlag ){
RefFlag = 0;
for( i = 0; i < REF_LINE; i ++ ){
fseek( fp, ( RecNo + Browse.cl ) * REC_SIZE + i * ( REF_SIZE + 1 )
+ ( KEY_SIZE + 1 ), SEEK_SET );
fgets( Buf, REF_SIZE + 1, fp );
ZWprintf( i + BROWSE_ROWS + 4, 2, "%-*s", REF_SIZE, Buf );
}
ZWlocate( Browse.cl / BROWSE_COLS + 3,
( Browse.cl % BROWSE_COLS ) * ( KEY_SIZE + 2 ) + 2 );
}
return( 0 );
}
/*===========================================================================*/
/* Main Program */
/*---------------------------------------------------------------------------*/
void main()
{
int r;
if( Zinit( 0, 0 ) != 0 )
printf( "Failed on initialize environment!\n" );
else{
if( ( fp = fopen( "zlib.txt", "r" ) ) == NULL )
Zerror( 10, 28, "待演示文本操作失??！" );
else{
fseek( fp, 0, SEEK_END );
RecCnt = ftell( fp ) / REC_SIZE;
fseek( fp, 0, SEEK_SET );
RefFlag = 0;
r = Zbrowse( &Browse );
fclose( fp );
if( r == 0 )
Zerror( 10, 30, "瀏覽器演示失?。?quot; );
}
Zexit();
}
}
/*****************************************************************************/
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