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rockbox/apps/plugins/calculator.c
Ophir LOJKINE e86991f484 Implements exponential and logarithm in calculator plugin 
exponential implementation uses the series
e^x = 1 + x + x^2/2 + x^3/6 + ...

natural logarithm uses
ln(a) = 2 * ( (a-1)/(a+1) + 1/3 * ((a-1)/(a+1))^3 +... )

log10 uses
log10(a) = ln(a)/ln(10)

Change-Id: I7303404b2b5a2bf60aad0706ca964a7cea19a27c
Reviewed-on: http://gerrit.rockbox.org/333
Reviewed-by: Frank Gevaerts <frank@gevaerts.be>
2012-10-19 23:05:25 +02:00

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2004 Pengxuan Liu (Isaac)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/*
00 01 21 22 23 43 44 45 65 66 67 87 88 89 109110111
00 |-----------|-----------|-----------|-----------|-----------|
01 | | | | | |
|***********|***********|***********|***********|***********|
|***********|***********|***********|***********|***********|
11 | | | | | |
12 |-----------|-----------|-----------|-----------|-----------|
13 |-----------|-----------|-----------|-----------|-----------| y1
14 | | | | | |
| | | | | |
22 | | | | | |
23 |-----------|-----------|-----------|-----------|-----------| y2
24 | | | | | |
| | | | | |
32 | | | | | |
33 |-----------|-----------|-----------|-----------|-----------| y3
34 | | | | | |
| | | | | |
42 | | | | | |
43 |-----------|-----------|-----------|-----------|-----------| y4
44 | | | | | |
| | | | | |
52 | | | | | |
53 |-----------|-----------|-----------|-----------|-----------| y5
54 | | | | | |
| | | | | |
62 | | | | | |
63 |-----------|-----------|-----------|-----------|-----------| y6
x0 x1 x2 x3 x4 x5
*/
/*---------------------------------------------------------------------------
Features:
- Scientific number format core code. Support range 10^-999 ~ 10^999
- Number of significant figures up to 10
Limitations:
- Right now, only accept "num, operator (+,-,*,/), num, =" input sequence.
Input "3, +, 5, -, 2, =", the calculator will only do 5-2 and result = 3
You have to input "3, +, 5, =, -, 2, =" to get 3+5-2 = 6
- "*,/" have no priority. Actually you can't input 3+5*2 yet.
User Instructions:
use arrow button to move cursor, "play" button to select, "off" button to exit
F1: if typing numbers, it's equal to "Del"; otherwise, equal to "C"
F2: circle input "+, -, *, /"
F3: equal to "="
"MR" : load temp memory
"M+" : add currently display to temp memory
"C" : reset calculator
---------------------------------------------------------------------------*/
#include "plugin.h"
#include "math.h"
#define M_TWOPI (M_PI * 2.0)
#define BUTTON_ROWS 5
#define BUTTON_COLS 5
#define REC_HEIGHT (int)(LCD_HEIGHT / (BUTTON_ROWS + 1))
#define REC_WIDTH (int)(LCD_WIDTH / BUTTON_COLS)
#define Y_6_POS (LCD_HEIGHT) /* Leave room for the border */
#define Y_5_POS (Y_6_POS - REC_HEIGHT) /* y5 = 53 */
#define Y_4_POS (Y_5_POS - REC_HEIGHT) /* y4 = 43 */
#define Y_3_POS (Y_4_POS - REC_HEIGHT) /* y3 = 33 */
#define Y_2_POS (Y_3_POS - REC_HEIGHT) /* y2 = 23 */
#define Y_1_POS (Y_2_POS - REC_HEIGHT) /* y1 = 13 */
#define Y_0_POS 0 /* y0 = 0 */
#define X_0_POS 0 /* x0 = 0 */
#define X_1_POS (X_0_POS + REC_WIDTH) /* x1 = 22 */
#define X_2_POS (X_1_POS + REC_WIDTH) /* x2 = 44 */
#define X_3_POS (X_2_POS + REC_WIDTH) /* x3 = 66 */
#define X_4_POS (X_3_POS + REC_WIDTH) /* x4 = 88 */
#define X_5_POS (X_4_POS + REC_WIDTH) /* x5 = 110, column 111 left blank */
#define SIGN(x) ((x)<0?-1:1)
#ifndef ABS
#define ABS(a) (((a) < 0) ? -(a) : (a))
#endif
/* variable button definitions */
#if CONFIG_KEYPAD == RECORDER_PAD
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_OFF
#define CALCULATOR_INPUT BUTTON_PLAY
#define CALCULATOR_CALC BUTTON_F3
#define CALCULATOR_OPERATORS BUTTON_F2
#define CALCULATOR_CLEAR BUTTON_F1
#elif CONFIG_KEYPAD == ARCHOS_AV300_PAD
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_OFF
#define CALCULATOR_INPUT BUTTON_SELECT
#define CALCULATOR_CALC BUTTON_F3
#define CALCULATOR_OPERATORS BUTTON_F2
#define CALCULATOR_CLEAR BUTTON_F1
#elif CONFIG_KEYPAD == ONDIO_PAD
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_OFF
#define CALCULATOR_INPUT_CALC_PRE BUTTON_MENU
#define CALCULATOR_INPUT (BUTTON_MENU | BUTTON_REL)
#define CALCULATOR_CALC (BUTTON_MENU | BUTTON_REPEAT)
#elif (CONFIG_KEYPAD == IRIVER_H100_PAD) || \
(CONFIG_KEYPAD == IRIVER_H300_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_OFF
#define CALCULATOR_INPUT BUTTON_SELECT
#define CALCULATOR_CALC BUTTON_ON
#define CALCULATOR_OPERATORS BUTTON_MODE
#define CALCULATOR_CLEAR BUTTON_REC
#define CALCULATOR_RC_QUIT BUTTON_RC_STOP
#elif (CONFIG_KEYPAD == IPOD_4G_PAD) || \
(CONFIG_KEYPAD == IPOD_3G_PAD) || \
(CONFIG_KEYPAD == IPOD_1G2G_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP_W_SHIFT BUTTON_SCROLL_BACK
#define CALCULATOR_DOWN_W_SHIFT BUTTON_SCROLL_FWD
#define CALCULATOR_QUIT BUTTON_MENU
#define CALCULATOR_INPUT BUTTON_SELECT
#define CALCULATOR_CALC BUTTON_PLAY
#elif (CONFIG_KEYPAD == IAUDIO_X5M5_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT BUTTON_SELECT
#define CALCULATOR_CALC BUTTON_PLAY
#define CALCULATOR_CLEAR BUTTON_REC
#elif (CONFIG_KEYPAD == GIGABEAT_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT BUTTON_SELECT
#define CALCULATOR_CALC BUTTON_MENU
#define CALCULATOR_CLEAR BUTTON_A
#elif (CONFIG_KEYPAD == SANSA_E200_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_UP_W_SHIFT BUTTON_SCROLL_BACK
#define CALCULATOR_DOWN_W_SHIFT BUTTON_SCROLL_FWD
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT_CALC_PRE BUTTON_SELECT
#define CALCULATOR_INPUT (BUTTON_SELECT|BUTTON_REL)
#define CALCULATOR_CALC (BUTTON_SELECT|BUTTON_REPEAT)
#define CALCULATOR_CLEAR BUTTON_REC
#elif (CONFIG_KEYPAD == SANSA_C200_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT_CALC_PRE BUTTON_SELECT
#define CALCULATOR_INPUT (BUTTON_SELECT|BUTTON_REL)
#define CALCULATOR_CALC (BUTTON_SELECT|BUTTON_REPEAT)
#elif (CONFIG_KEYPAD == SANSA_FUZE_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_UP_W_SHIFT BUTTON_SCROLL_BACK
#define CALCULATOR_DOWN_W_SHIFT BUTTON_SCROLL_FWD
#define CALCULATOR_QUIT (BUTTON_HOME|BUTTON_REPEAT)
#define CALCULATOR_INPUT_CALC_PRE BUTTON_SELECT
#define CALCULATOR_INPUT (BUTTON_SELECT|BUTTON_REL)
#define CALCULATOR_CALC (BUTTON_SELECT|BUTTON_REPEAT)
#define CALCULATOR_CLEAR BUTTON_HOME
#elif (CONFIG_KEYPAD == SANSA_CLIP_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT_CALC_PRE BUTTON_SELECT
#define CALCULATOR_INPUT (BUTTON_SELECT|BUTTON_REL)
#define CALCULATOR_CALC (BUTTON_SELECT|BUTTON_REPEAT)
#define CALCULATOR_CLEAR BUTTON_HOME
#elif (CONFIG_KEYPAD == SANSA_M200_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT_CALC_PRE BUTTON_SELECT
#define CALCULATOR_INPUT (BUTTON_SELECT|BUTTON_REL)
#define CALCULATOR_CALC (BUTTON_SELECT|BUTTON_REPEAT)
#define CALCULATOR_CLEAR (BUTTON_SELECT|BUTTON_UP)
#elif (CONFIG_KEYPAD == IRIVER_H10_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_SCROLL_UP
#define CALCULATOR_DOWN BUTTON_SCROLL_DOWN
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT_CALC_PRE BUTTON_PLAY
#define CALCULATOR_INPUT (BUTTON_PLAY | BUTTON_REL)
#define CALCULATOR_CALC (BUTTON_PLAY | BUTTON_REPEAT)
#define CALCULATOR_CLEAR BUTTON_REW
#elif (CONFIG_KEYPAD == GIGABEAT_S_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_BACK
#define CALCULATOR_INPUT BUTTON_SELECT
#define CALCULATOR_CALC BUTTON_MENU
#define CALCULATOR_CLEAR BUTTON_PLAY
#elif (CONFIG_KEYPAD == MROBE100_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT BUTTON_SELECT
#define CALCULATOR_CALC BUTTON_MENU
#define CALCULATOR_CLEAR BUTTON_DISPLAY
#elif CONFIG_KEYPAD == IAUDIO_M3_PAD
#define CALCULATOR_LEFT BUTTON_RC_REW
#define CALCULATOR_RIGHT BUTTON_RC_FF
#define CALCULATOR_UP BUTTON_RC_VOL_UP
#define CALCULATOR_DOWN BUTTON_RC_VOL_DOWN
#define CALCULATOR_QUIT BUTTON_RC_REC
#define CALCULATOR_INPUT BUTTON_RC_PLAY
#define CALCULATOR_CALC BUTTON_RC_MODE
#define CALCULATOR_CLEAR BUTTON_RC_MENU
#define CALCULATOR_RC_QUIT BUTTON_REC
#elif (CONFIG_KEYPAD == COWON_D2_PAD)
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_CLEAR BUTTON_MENU
#elif CONFIG_KEYPAD == IAUDIO67_PAD
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_VOLUP
#define CALCULATOR_DOWN BUTTON_VOLDOWN
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT BUTTON_PLAY
#define CALCULATOR_CALC BUTTON_MENU
#define CALCULATOR_CLEAR BUTTON_STOP
#define CALCULATOR_RC_QUIT (BUTTON_MENU|BUTTON_PLAY)
#elif (CONFIG_KEYPAD == CREATIVEZVM_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_BACK
#define CALCULATOR_INPUT BUTTON_SELECT
#define CALCULATOR_CALC BUTTON_MENU
#define CALCULATOR_CLEAR BUTTON_PLAY
#elif CONFIG_KEYPAD == PHILIPS_HDD1630_PAD
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT BUTTON_SELECT
#define CALCULATOR_CALC BUTTON_MENU
#define CALCULATOR_CLEAR BUTTON_VIEW
#elif CONFIG_KEYPAD == PHILIPS_HDD6330_PAD
#define CALCULATOR_LEFT BUTTON_PREV
#define CALCULATOR_RIGHT BUTTON_NEXT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT BUTTON_PLAY
#define CALCULATOR_CALC BUTTON_MENU
#define CALCULATOR_CLEAR BUTTON_RIGHT
#elif CONFIG_KEYPAD == PHILIPS_SA9200_PAD
#define CALCULATOR_LEFT BUTTON_PREV
#define CALCULATOR_RIGHT BUTTON_NEXT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT BUTTON_PLAY
#define CALCULATOR_CALC BUTTON_MENU
#define CALCULATOR_CLEAR BUTTON_RIGHT
#elif (CONFIG_KEYPAD == ONDAVX747_PAD)
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_CLEAR BUTTON_MENU
#elif (CONFIG_KEYPAD == ONDAVX777_PAD)
#define CALCULATOR_QUIT BUTTON_POWER
#elif CONFIG_KEYPAD == MROBE500_PAD
#define CALCULATOR_QUIT BUTTON_POWER
#elif CONFIG_KEYPAD == SAMSUNG_YH_PAD
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_REC
#define CALCULATOR_INPUT BUTTON_PLAY
#define CALCULATOR_CALC BUTTON_FFWD
#define CALCULATOR_CLEAR BUTTON_REW
#elif CONFIG_KEYPAD == PBELL_VIBE500_PAD
#define CALCULATOR_LEFT BUTTON_PREV
#define CALCULATOR_RIGHT BUTTON_NEXT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_REC
#define CALCULATOR_INPUT BUTTON_OK
#define CALCULATOR_CALC BUTTON_PLAY
#define CALCULATOR_CLEAR BUTTON_CANCEL
#elif CONFIG_KEYPAD == MPIO_HD200_PAD
#define CALCULATOR_LEFT BUTTON_REW
#define CALCULATOR_RIGHT BUTTON_FF
#define CALCULATOR_QUIT (BUTTON_REC|BUTTON_PLAY)
#define CALCULATOR_INPUT BUTTON_FUNC
#define CALCULATOR_CALC BUTTON_PLAY
#define CALCULATOR_CLEAR BUTTON_REC
#elif CONFIG_KEYPAD == MPIO_HD300_PAD
#define CALCULATOR_LEFT BUTTON_REW
#define CALCULATOR_RIGHT BUTTON_FF
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT (BUTTON_MENU|BUTTON_REPEAT)
#define CALCULATOR_INPUT BUTTON_ENTER
#define CALCULATOR_CALC BUTTON_PLAY
#define CALCULATOR_CLEAR BUTTON_MENU
#elif CONFIG_KEYPAD == SANSA_FUZEPLUS_PAD
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT BUTTON_SELECT
#define CALCULATOR_CALC BUTTON_PLAYPAUSE
#define CALCULATOR_CLEAR BUTTON_BACK
#elif (CONFIG_KEYPAD == SANSA_CONNECT_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_UP_W_SHIFT BUTTON_SCROLL_BACK
#define CALCULATOR_DOWN_W_SHIFT BUTTON_SCROLL_FWD
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT_CALC_PRE BUTTON_SELECT
#define CALCULATOR_INPUT (BUTTON_SELECT|BUTTON_REL)
#define CALCULATOR_CALC BUTTON_NEXT
#define CALCULATOR_CLEAR BUTTON_PREV
#elif (CONFIG_KEYPAD == SAMSUNG_YPR0_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_BACK
#define CALCULATOR_INPUT BUTTON_SELECT
#define CALCULATOR_CALC BUTTON_MENU
#define CALCULATOR_CLEAR BUTTON_USER
#elif (CONFIG_KEYPAD == HM60X_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT BUTTON_SELECT
#define CALCULATOR_CALC (BUTTON_UP|BUTTON_POWER)
#define CALCULATOR_CLEAR (BUTTON_DOWN|BUTTON_POWER)
#elif (CONFIG_KEYPAD == HM801_PAD)
#define CALCULATOR_LEFT BUTTON_LEFT
#define CALCULATOR_RIGHT BUTTON_RIGHT
#define CALCULATOR_UP BUTTON_UP
#define CALCULATOR_DOWN BUTTON_DOWN
#define CALCULATOR_QUIT BUTTON_POWER
#define CALCULATOR_INPUT BUTTON_SELECT
#define CALCULATOR_CALC BUTTON_PLAY
#define CALCULATOR_CLEAR BUTTON_PREV
#else
#error No keymap defined!
#endif
#ifdef HAVE_TOUCHSCREEN
#ifndef CALCULATOR_LEFT
#define CALCULATOR_LEFT BUTTON_MIDLEFT
#endif
#ifndef CALCULATOR_RIGHT
#define CALCULATOR_RIGHT BUTTON_MIDRIGHT
#endif
#ifndef CALCULATOR_UP
#define CALCULATOR_UP BUTTON_TOPMIDDLE
#endif
#ifndef CALCULATOR_DOWN
#define CALCULATOR_DOWN BUTTON_BOTTOMMIDDLE
#endif
#ifndef CALCULATOR_CALC
#define CALCULATOR_CALC BUTTON_BOTTOMRIGHT
#endif
#ifndef CALCULATOR_INPUT
#define CALCULATOR_INPUT BUTTON_CENTER
#endif
#ifndef CALCULATOR_CLEAR
#define CALCULATOR_CLEAR BUTTON_TOPRIGHT
#endif
#include "lib/pluginlib_touchscreen.h"
static struct ts_raster calc_raster = { X_0_POS, Y_1_POS,
BUTTON_COLS*REC_WIDTH, BUTTON_ROWS*REC_HEIGHT, REC_WIDTH, REC_HEIGHT };
#endif
enum {
basicButtons,
sciButtons
} buttonGroup;
unsigned char* buttonChar[2][5][5] = {
{ { "MR" , "M+" , "2nd" , "CE" , "C" },
{ "7" , "8" , "9" , "/" , "sqr" },
{ "4" , "5" , "6" , "*" , "x^2" },
{ "1" , "2" , "3" , "-" , "1/x" },
{ "0" , "+/-", "." , "+" , "=" } },
{ { "n!" , "PI" , "1st" , "sin" , "asi" },
{ "7" , "8" , "9" , "cos" , "aco" },
{ "4" , "5" , "6" , "tan" , "ata" },
{ "1" , "2" , "3" , "ln" , "e^x" },
{ "0" , "+/-", "." , "log" , "x^y" } }
};
enum { btn_MR , btn_M , btn_bas , btn_CE , btn_C ,
btn_7 , btn_8 , btn_9 , btn_div , btn_sqr ,
btn_4 , btn_5 , btn_6 , btn_time , btn_square ,
btn_1 , btn_2 , btn_3 , btn_minus , btn_rec ,
btn_0 , btn_sign , btn_dot , btn_add , btn_equal
};
enum { sci_fac, sci_pi , sci_sci , sci_sin , sci_asin ,
sci_7 , sci_8 , sci_9 , sci_cos , sci_acos ,
sci_4 , sci_5 , sci_6 , sci_tan , sci_atan ,
sci_1 , sci_2 , sci_3 , sci_ln , sci_exp ,
sci_0 , sci_sign , sci_dot , sci_log , sci_xy
};
#define MINIMUM 0.000000000001 /* e-12 */
/* ^ ^ ^ ^ */
/* 123456789abcdef */
#define DIGITLEN 10 /* must <= 10 */
#define SCIENTIFIC_FORMAT ( power < -(DIGITLEN-3) || power > (DIGITLEN))
/* 0.000 00000 0001 */
/* ^ ^ ^ ^ ^ ^ */
/* DIGITLEN 12345 6789a bcdef */
/* power 12 34567 89abc def */
/* 10^- 123 45678 9abcd ef */
unsigned char buf[19];/* 18 bytes of output line,
buf[0] is operator
buf[1] = 'M' if memTemp is not 0
buf[2] = ' '
if SCIENTIFIC_FORMAT
buf[2]-buf[12] or buf[3]-buf[13] = result;
format X.XXXXXXXX
buf[13] or buf[14] -buf[17] = power;
format eXXX or e-XXX
else
buf[3]-buf[6] = ' ';
buf[7]-buf[17] = result;
buf[18] = '\0' */
unsigned char typingbuf[DIGITLEN+2];/* byte 0 is sign or ' ',
byte 1~DIGITLEN are num and '.'
byte (DIGITLEN+1) is '\0' */
unsigned char* typingbufPointer = typingbuf;
double result = 0; /* main operand, format 0.xxxxx */
int power = 0; /* 10^power */
double modifier = 0.1; /* position of next input */
double operand = 0; /* second operand, format 0.xxxxx */
int operandPower = 0; /* 10^power of second operand */
char oper = ' '; /* operators: + - * / */
bool operInputted = false; /* false: do calculation first and
replace current oper
true: just replace current oper */
double memTemp = 0; /* temp memory */
int memTempPower = 0; /* 10^^power of memTemp */
int btn_row, btn_col; /* current position index for button */
int prev_btn_row, prev_btn_col; /* previous cursor position */
#define CAL_BUTTON (btn_row*5+btn_col)
int btn = BUTTON_NONE;
int lastbtn = BUTTON_NONE;
/* Status of calculator */
enum {cal_normal, /* 0, normal status, display result */
cal_typing, /* 1, currently typing, dot hasn't been typed */
cal_dotted, /* 2, currently typing, dot already has been typed. */
cal_error,
cal_exit,
cal_toDo
} calStatus;
/* constant table for CORDIC algorithm */
static const double cordicTable[51][2]= {
/* pow(2,0) - pow(2,-50) atan(pow(2,0) - atan(pow(2,-50) */
{1e+00, 7.853981633974483e-01},
{5e-01, 4.636476090008061e-01},
{2.5e-01, 2.449786631268641e-01},
{1.25e-01, 1.243549945467614e-01},
{6.25e-02, 6.241880999595735e-02},
{3.125e-02, 3.123983343026828e-02},
{1.5625e-02, 1.562372862047683e-02},
{7.8125e-03, 7.812341060101111e-03},
{3.90625e-03, 3.906230131966972e-03},
{1.953125e-03, 1.953122516478819e-03},
{9.765625e-04, 9.765621895593195e-04},
{4.8828125e-04, 4.882812111948983e-04},
{2.44140625e-04, 2.441406201493618e-04},
{1.220703125e-04, 1.220703118936702e-04},
{6.103515625e-05, 6.103515617420877e-05},
{3.0517578125e-05, 3.051757811552610e-05},
{1.52587890625e-05, 1.525878906131576e-05},
{7.62939453125e-06, 7.629394531101970e-06},
{3.814697265625e-06, 3.814697265606496e-06},
{1.9073486328125e-06, 1.907348632810187e-06},
{9.5367431640625e-07, 9.536743164059608e-07},
{4.76837158203125e-07, 4.768371582030888e-07},
{2.384185791015625e-07, 2.384185791015580e-07},
{1.1920928955078125e-07, 1.192092895507807e-07},
{5.9604644775390625e-08, 5.960464477539055e-08},
{2.98023223876953125e-08, 2.980232238769530e-08},
{1.490116119384765625e-08, 1.490116119384765e-08},
{7.450580596923828125e-09, 7.450580596923828e-09},
{3.7252902984619140625e-09, 3.725290298461914e-09},
{1.86264514923095703125e-09, 1.862645149230957e-09},
{9.31322574615478515625e-10, 9.313225746154785e-10},
{4.656612873077392578125e-10, 4.656612873077393e-10},
{2.3283064365386962890625e-10, 2.328306436538696e-10},
{1.16415321826934814453125e-10, 1.164153218269348e-10},
{5.82076609134674072265625e-11, 5.820766091346741e-11},
{2.910383045673370361328125e-11, 2.910383045673370e-11},
{1.4551915228366851806640625e-11, 1.455191522836685e-11},
{7.2759576141834259033203125e-12, 7.275957614183426e-12},
{3.63797880709171295166015625e-12, 3.637978807091713e-12},
{1.818989403545856475830078125e-12, 1.818989403545856e-12},
{9.094947017729282379150390625e-13, 9.094947017729282e-13},
{4.5474735088646411895751953125e-13, 4.547473508864641e-13},
{2.27373675443232059478759765625e-13, 2.273736754432321e-13},
{1.136868377216160297393798828125e-13, 1.136868377216160e-13},
{5.684341886080801486968994140625e-14, 5.684341886080801e-14},
{2.8421709430404007434844970703125e-14, 2.842170943040401e-14},
{1.42108547152020037174224853515625e-14, 1.421085471520200e-14},
{7.10542735760100185871124267578125e-15, 7.105427357601002e-15},
{3.552713678800500929355621337890625e-15, 3.552713678800501e-15},
{1.7763568394002504646778106689453125e-15, 1.776356839400250e-15},
{8.8817841970012523233890533447265625e-16, 8.881784197001252e-16}
};
static void doMultiple(double* operandOne, int* powerOne,
double operandTwo, int powerTwo);
static void doAdd (double* operandOne, int* powerOne,
double operandTwo, int powerTwo);
static void printResult(void);
static void formatResult(void);
static void oneOperand(void);
static void drawLines(void);
static void drawButtons(int group);
/* -----------------------------------------------------------------------
Handy functions
----------------------------------------------------------------------- */
static void cleartypingbuf(void)
{
int k;
for( k=1; k<=(DIGITLEN+1); k++)
typingbuf[k] = 0;
typingbuf[0] = ' ';
typingbufPointer = typingbuf+1;
}
static void clearbuf(void)
{
int k;
for(k=0;k<18;k++)
buf[k]=' ';
buf[18] = 0;
}
static void clearResult(void)
{
result = 0;
power = 0;
modifier = 0.1;
}
static void clearInput(void)
{
calStatus = cal_normal;
clearResult();
cleartypingbuf();
rb->lcd_clear_display();
drawButtons(buttonGroup);
drawLines();
}
static void clearOperand(void)
{
operand = 0;
operandPower = 0;
}
static void clearMemTemp(void)
{
memTemp = 0;
memTempPower = 0;
}
static void clearOper(void)
{
oper = ' ';
operInputted = false;
}
static void clearMem(void)
{
clearInput();
clearMemTemp();
clearOperand();
clearOper();
btn = BUTTON_NONE;
}
static void switchOperands(void)
{
double tempr = operand;
int tempp = operandPower;
operand = result;
operandPower = power;
result = tempr;
power = tempp;
}
static void drawLines(void)
{
int i;
rb->lcd_hline(0, LCD_WIDTH, Y_1_POS-1);
for (i = 0; i < 5 ; i++)
rb->lcd_hline(0, LCD_WIDTH, Y_1_POS+i*REC_HEIGHT);
for (i = 0; i < 4 ; i++)
rb->lcd_vline(X_1_POS+i*REC_WIDTH, Y_1_POS, LCD_HEIGHT);
}
static void drawButtons(int group)
{
int i, j, w, h;
for (i = 0; i <= 4; i++){
for (j = 0; j <= 4; j++){
rb->lcd_getstringsize( buttonChar[group][i][j],&w,&h);
if (i == btn_row && j == btn_col) /* selected item */
rb->lcd_set_drawmode(DRMODE_SOLID);
else
rb->lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
rb->lcd_fillrect( X_0_POS + j*REC_WIDTH,
Y_1_POS + i*REC_HEIGHT,
REC_WIDTH, REC_HEIGHT+1);
if (i == btn_row && j == btn_col) /* selected item */
rb->lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
else
rb->lcd_set_drawmode(DRMODE_SOLID);
rb->lcd_putsxy( X_0_POS + j*REC_WIDTH + (REC_WIDTH - w)/2,
Y_1_POS + i*REC_HEIGHT + (REC_HEIGHT - h)/2 + 1,
buttonChar[group][i][j] );
}
}
rb->lcd_set_drawmode(DRMODE_SOLID);
}
/* -----------------------------------------------------------------------
Initiate calculator
----------------------------------------------------------------------- */
static void cal_initial (void)
{
int w,h;
rb->lcd_getstringsize("2nd",&w,&h);
if (w > REC_WIDTH || h > REC_HEIGHT)
rb->lcd_setfont(FONT_SYSFIXED);
rb->lcd_clear_display();
#ifdef CALCULATOR_OPERATORS
/* basic operators are available through separate button */
buttonGroup = sciButtons;
#else
buttonGroup = basicButtons;
#endif
/* initially, invert button "5" */
btn_row = 2;
btn_col = 1;
prev_btn_row = btn_row;
prev_btn_col = btn_col;
drawButtons(buttonGroup);
drawLines();
rb->lcd_update();
/* initial mem and output display*/
clearMem();
printResult();
/* clear button queue */
rb->button_clear_queue();
}
/* -----------------------------------------------------------------------
mySqrt uses Heron's algorithm, which is the Newtone-Raphson algorhitm
in it's private case for sqrt.
Thanks BlueChip for his intro text and Dave Straayer for the actual name.
----------------------------------------------------------------------- */
static double mySqrt(double square)
{
int k = 0;
double temp = 0;
double root= ABS(square+1)/2;
while( ABS(root - temp) > MINIMUM ){
temp = root;
root = (square/temp + temp)/2;
k++;
if (k>10000) return 0;
}
return root;
}
/*Uses the sequence sum(x^k/k!) that tends to exp(x)*/
static double myExp (double x) {
unsigned int k=0;
double res=0, xPow=1,fact=1,toAdd;
do {
toAdd = xPow/fact;
res += toAdd;
xPow *= x; //xPow = x^k
k++;
fact*=k; //fact = k!
} while (ABS(toAdd) > MINIMUM && xPow<1e302);
return res;
}
/*myLn : uses the series ln⁡(a) = 2 * ∑(1/(2n+1) * ((a-1)/(a+1))^(2k+1) )*/
static double myLn (double a) {
unsigned int k=1;
double res=0,xPow,xSquare,fract=1,toAdd;
xPow = (a-1)/(a+1);
xSquare = xPow*xPow;
do {
toAdd = fract*xPow;
res += toAdd;
xPow *= xSquare; // ((a-1)/(a+1))^k
k+=2;
fract=1./k;
} while (ABS(toAdd) > MINIMUM);
return res * 2;
}
/* -----------------------------------------------------------------------
transcendFunc uses CORDIC (COordinate Rotation DIgital Computer) method
transcendFunc can do sin,cos,log,exp
input parameter is angle
----------------------------------------------------------------------- */
static void transcendFunc(char* func, double* tt, int* ttPower)
{
double t = (*tt)*M_PI/180; int tPower = *ttPower;
int sign = 1;
int n = 50; /* n <=50, tables are all <= 50 */
int j;
double x,y,z,xt,yt,zt;
if (tPower < -998) {
calStatus = cal_normal;
return;
}
if (tPower > 8) {
calStatus = cal_error;
return;
}
*ttPower = 0;
calStatus = cal_normal;
if( func[0] =='s' || func[0] =='S'|| func[0] =='t' || func[0] =='T')
sign = SIGN(t);
else {
/* if( func[0] =='c' || func[0] =='C') */
sign = 1;
}
t = ABS(t);
while (tPower > 0){
t *= 10;
tPower--;
}
while (tPower < 0) {
t /= 10;
tPower++;
}
j = 0;
while (t > j*M_TWOPI) {j++;}
t -= (j-1)*M_TWOPI;
if (M_PI_2 < t && t < 3*M_PI_2){
t = M_PI - t;
if (func[0] =='c' || func[0] =='C')
sign = -1;
else if (func[0] =='t' || func[0] =='T')
t*=-1;
}
else if ( 3*M_PI_2 <= t && t <= M_TWOPI)
t -= M_TWOPI;
x = 0.60725293500888; y = 0; z = t;
for (j=1;j<n+2;j++){
xt = x - SIGN(z) * y*cordicTable[j-1][0];
yt = y + SIGN(z) * x*cordicTable[j-1][0];
zt = z - SIGN(z) * cordicTable[j-1][1];
x = xt;
y=yt;
z=zt;
}
if( func[0] =='s' || func[0] =='S') {
*tt = sign*y;
return;
}
else if( func[0] =='c' || func[0] =='C') {
*tt = sign*x;
return;
}
else /*if( func[0] =='t' || func[0] =='T')*/ {
if(t==M_PI_2||t==-M_PI_2){
calStatus = cal_error;
return;
}
else{
*tt = sign*(y/x);
return;
}
}
}
/* -----------------------------------------------------------------------
add in scientific number format
----------------------------------------------------------------------- */
static void doAdd (double* operandOne, int* powerOne,
double operandTwo, int powerTwo)
{
if ( *powerOne >= powerTwo ){
if (*powerOne - powerTwo <= DIGITLEN+1){
while (powerTwo < *powerOne){
operandTwo /=10;
powerTwo++;
}
*operandOne += operandTwo;
}
/*do nothing if operandTwo is too small*/
}
else{
if (powerTwo - *powerOne <= DIGITLEN+1){
while(powerTwo > *powerOne){
*operandOne /=10;
(*powerOne)++;
}
(*operandOne) += operandTwo;
}
else{/* simply copy operandTwo if operandOne is too small */
*operandOne = operandTwo;
*powerOne = powerTwo;
}
}
}
/* -----------------------------------------------------------------------
multiple in scientific number format
----------------------------------------------------------------------- */
static void doMultiple(double* operandOne, int* powerOne,
double operandTwo, int powerTwo)
{
(*operandOne) *= operandTwo;
(*powerOne) += powerTwo;
}
/* -----------------------------------------------------------------------
Handles all one operand calculations
----------------------------------------------------------------------- */
static void oneOperand(void)
{
int k = 0;
if (buttonGroup == basicButtons){
switch(CAL_BUTTON){
case btn_sqr:
if (result<0)
calStatus = cal_error;
else{
if (power%2 == 1){
result = (mySqrt(result*10))/10;
power = (power+1) / 2;
}
else{
result = mySqrt(result);
power = power / 2;
}
calStatus = cal_normal;
}
break;
case btn_square:
power *= 2;
result *= result;
calStatus = cal_normal;
break;
case btn_rec:
if (result==0)
calStatus = cal_error;
else{
power = -power;
result = 1/result;
calStatus = cal_normal;
}
break;
default:
calStatus = cal_toDo;
break; /* just for the safety */
}
}
else{ /* sciButtons */
switch(CAL_BUTTON){
case sci_sin:
transcendFunc("sin", &result, &power);
break;
case sci_cos:
transcendFunc("cos", &result, &power);
break;
case sci_tan:
transcendFunc("tan", &result, &power);
break;
case sci_fac:
if (power<0 || power>8 || result<0 )
calStatus = cal_error;
else if(result == 0) {
result = 1;
power = 0;
}
else{
while(power > 0) {
result *= 10;
power--;
}
if ( ( result - (int)result) > MINIMUM )
calStatus = cal_error;
else {
k = result; result = 1;
while (k > 1){
doMultiple(&result, &power, k, 0);
formatResult();
k--;
}
calStatus = cal_normal;
}
}
break;
case sci_exp:
/*Uses the sequence (1+a/n)^n -> exp(a) */
if (power>3 || result > 1e3) calStatus = cal_error;
else {
while(power < 0) {
result /= 10;
power++;
}
while (power > 0){
power--;
result*=10;
}
result = myExp(result);
calStatus = cal_normal;
}
break;
case sci_ln:
if (result<=0) calStatus = cal_error;
else {
//ln(a*10^n) = ln(a) + n*ln(10), with ln(10) ≈ 2.30
result = myLn(result) + power * 2.302585092994046;
power=0;
calStatus = cal_normal;
}
break;
case sci_log:
if (result<=0) calStatus = cal_error;
else {
//log10(a+10^n) = ln(a)/ln(10) + n, with ln(10) ≈ 2.30
result = myLn(result)/2.302585092994046 + power;
power=0;
calStatus = cal_normal;
}
break;
default:
calStatus = cal_toDo;
break; /* just for the safety */
}
}
}
/* -----------------------------------------------------------------------
Handles all two operands calculations
----------------------------------------------------------------------- */
static void twoOperands(void)
{
switch(oper){
case '-':
doAdd(&operand, &operandPower, -result, power);
break;
case '+':
doAdd(&operand, &operandPower, result, power);
break;
case '*':
doMultiple(&operand, &operandPower, result, power);
break;
case '/':
if ( ABS(result) > MINIMUM ){
doMultiple(&operand, &operandPower, 1/result, -power);
}
else
calStatus = cal_error;
break;
default: /* ' ' */
switchOperands(); /* counter switchOperands() below */
break;
} /* switch(oper) */
switchOperands();
clearOper();
}
/* First, increases *dimen1 by dimen1_delta modulo dimen1_modulo.
If dimen1 wraps, increases *dimen2 by dimen2_delta modulo dimen2_modulo.
*/
static void move_with_wrap_and_shift(
int *dimen1, int dimen1_delta, int dimen1_modulo,
int *dimen2, int dimen2_delta, int dimen2_modulo)
{
bool wrapped = false;
*dimen1 += dimen1_delta;
if (*dimen1 < 0)
{
*dimen1 = dimen1_modulo - 1;
wrapped = true;
}
else if (*dimen1 >= dimen1_modulo)
{
*dimen1 = 0;
wrapped = true;
}
if (wrapped)
{
/* Make the dividend always positive to be sure about the result.
Adding dimen2_modulo does not change it since we do it modulo. */
*dimen2 = (*dimen2 + dimen2_modulo + dimen2_delta) % dimen2_modulo;
}
}
/* -----------------------------------------------------------------------
Print buttons when switching 1st and 2nd
int group = {basicButtons, sciButtons}
----------------------------------------------------------------------- */
static void printButtonGroups(int group)
{
drawButtons(group);
drawLines();
rb->lcd_update();
}
/* -----------------------------------------------------------------------
flash the currently marked button
----------------------------------------------------------------------- */
static void flashButton(void)
{
int k, w, h;
for (k=2;k>0;k--)
{
rb->lcd_getstringsize( buttonChar[buttonGroup][btn_row][btn_col],&w,&h);
rb->lcd_set_drawmode(DRMODE_SOLID|(k==1) ? 0 : DRMODE_INVERSEVID);
rb->lcd_fillrect( X_0_POS + btn_col*REC_WIDTH + 1,
Y_1_POS + btn_row*REC_HEIGHT + 1,
REC_WIDTH - 1, REC_HEIGHT - 1);
rb->lcd_putsxy( X_0_POS + btn_col*REC_WIDTH + (REC_WIDTH - w)/2,
Y_1_POS + btn_row*REC_HEIGHT + (REC_HEIGHT - h)/2 +1,
buttonChar[buttonGroup][btn_row][btn_col] );
rb->lcd_update_rect( X_0_POS + btn_col*REC_WIDTH + 1,
Y_1_POS + btn_row*REC_HEIGHT + 1,
REC_WIDTH - 1, REC_HEIGHT - 1);
if (k!= 1)
rb->sleep(HZ/22);
}
}
/* -----------------------------------------------------------------------
pos is the position that needs animation. pos = [1~18]
----------------------------------------------------------------------- */
#if defined(CALCULATOR_CLEAR) || defined(CALCULATOR_OPERATORS)
static void deleteAnimation(int pos)
{
int k, w, h, x;
if (pos<1 || pos >18)
return;
rb->lcd_getstringsize("0", &w, &h);
x = (pos==1? 4: LCD_WIDTH - 4 - w);
for (k=0;k<4;k++){
rb->lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
rb->lcd_fillrect(x, Y_1_POS - h -1, w, h);
rb->lcd_set_drawmode(DRMODE_SOLID);
rb->lcd_fillrect(x + (w*k)/8, Y_1_POS - h -1 + (h*k)/8,
(w*(4-k))/4, (h*(4-k))/4);
rb->lcd_update_rect(x, Y_1_POS - h -1, w, h);
rb->sleep(HZ/32);
}
}
#endif
/* -----------------------------------------------------------------------
result may be one of these formats:
0
xxxx.xxxx
0.xxxx
0.0000xxxx
formatResult() change result to standard format: 0.xxxx
if result is close to 0, let it be 0;
if result is close to 1, let it be 0.1 and power++;
----------------------------------------------------------------------- */
static void formatResult(void)
{
int resultsign = SIGN(result);
result = ABS(result);
if(result > MINIMUM ){ /* doesn't check power, might have problem
input wouldn't,
+ - * / of two formatted number wouldn't.
only a calculation that makes a formatted
number (0.xxxx) less than MINIMUM in only
one operation */
if (result<1){
while( (int)(result*10) == 0 ){
result *= 10;
power--;
modifier *= 10;
}
}
else{ /* result >= 1 */
while( (int)result != 0 ){
result /= 10;
power++;
modifier /= 10;
}
} /* if result<1 */
if (result > (1-MINIMUM)){
result = 0.1;
power++;
modifier /= 10;
}
result *= resultsign;
}
else {
result = 0;
power = 0;
modifier = 0.1;
}
}
/* -----------------------------------------------------------------------
result2typingbuf() outputs standard format result to typingbuf.
case SCIENTIFIC_FORMAT, let temppower = 1;
case temppower > 0: print '.' in the middle
case temppower <= 0: print '.' in the begining
----------------------------------------------------------------------- */
static void result2typingbuf(void)
{
bool haveDot = false;
char tempchar = 0;
int k;
double tempresult = ABS(result); /* positive num makes things simple */
int temppower;
double tempmodifier = 1;
int count;
if(SCIENTIFIC_FORMAT)
temppower = 1; /* output x.xxxx format */
else
temppower = power;
cleartypingbuf();
if(tempresult < MINIMUM){ /* if 0,faster display and avoid complication*/
typingbuf[0] = ' ';
typingbuf[1] = '0';
}
else{ /* tempresult > 0 */
typingbuf[0] = (SIGN(result)<0)?'-':' ';
typingbufPointer = typingbuf;
if(temppower > 0){
for (k = 0; k<DIGITLEN+1 ; k++){
typingbufPointer++;
if(temppower || *(typingbufPointer-1) == '.'){
count = 0;
tempmodifier = tempmodifier/10;
while( (tempresult-tempmodifier*count) >
(tempmodifier-MINIMUM)){
count++;
}
tempresult -= tempmodifier*count;
tempresult = ABS(tempresult);
temppower-- ;
*typingbufPointer = count + '0';
}
else{ /* temppower == 0 */
*typingbufPointer = '.';
haveDot = true;
}
} /* for */
}
else{
haveDot = true;
typingbufPointer++; *typingbufPointer = '0';
typingbufPointer++; *typingbufPointer = '.';
for (k = 2; k<DIGITLEN+1 ; k++){
typingbufPointer++;
count = 0;
if ( (-temppower) < (k-1)){
tempmodifier = tempmodifier/10;
while((tempresult-tempmodifier*count)>(tempmodifier-MINIMUM)){
count++;
}
tempresult -= tempmodifier*count;
tempresult = ABS(tempresult);
temppower-- ;
}
*typingbufPointer = count + '0';
}
}
/* now, typingbufPointer = typingbuf + 16 */
/* backward strip off 0 and '.' */
if (haveDot){
while( (*typingbufPointer == '0') || (*typingbufPointer == '.')){
tempchar = *typingbufPointer;
*typingbufPointer = 0;
typingbufPointer--;
if (tempchar == '.') break;
}
}
typingbuf[DIGITLEN+1] = 0;
} /* else tempresult > 0 */
}
/* -----------------------------------------------------------------------
printResult() generates LCD display.
----------------------------------------------------------------------- */
static void printResult(void)
{
int k, w, h;
char operbuf[3] = {0, 0, 0};
switch_Status:
switch(calStatus){
case cal_exit:
rb->lcd_clear_display();
rb->splash(HZ/3, "Bye now!");
break;
case cal_error:
clearbuf();
rb->snprintf(buf, 19, "%18s","Error");
break;
case cal_toDo:
clearbuf();
rb->snprintf(buf, 19, "%18s","Coming soon ^_* ");
break;
case cal_normal:
formatResult();
if( power > 1000 ){ /* power -1 > 999 */
calStatus = cal_error;
goto switch_Status;
}
if (power < -998 ) /* power -1 < -999 */
clearResult(); /* too small, let it be 0 */
result2typingbuf();
clearbuf();
operbuf[0] = oper;
operbuf[1] = ( ABS(memTemp) > MINIMUM )?'M':' ';
operbuf[2] = '\0';
if(SCIENTIFIC_FORMAT){
/* output format: X.XXXX eXXX */
if(power > -98){ /* power-1 >= -99, eXXX or e-XX */
rb->snprintf(buf, 12, "%11s",typingbuf);
for(k=11;k<=14;k++) buf[k] = ' ';
cleartypingbuf();
rb->snprintf(typingbuf, 5, "e%d",power-1);
rb->snprintf(buf+11, 5, "%4s",typingbuf);
}
else{ /* power-1 <= -100, e-XXX */
rb->snprintf(buf, 12, "%11s",typingbuf);
rb->snprintf(buf+11, 6, "e%d",power-1);
}
}
else{
rb->snprintf(buf, 12, "%11s",typingbuf);
} /* if SCIENTIFIC_FORMAT */
break;
case cal_typing:
case cal_dotted:
clearbuf();
operbuf[0] = oper;
operbuf[1] = ( ABS(memTemp) > MINIMUM )?'M':' ';
rb->snprintf(buf, 12, "%11s",typingbuf);
break;
}
rb->lcd_getstringsize(buf, &w, &h);
rb->screen_clear_area(rb->screens[0], 0, 0, LCD_WIDTH, Y_1_POS - 1);
rb->lcd_putsxy(4, Y_1_POS - h -1, operbuf);
rb->lcd_putsxy(LCD_WIDTH - w - 4, Y_1_POS - h -1, buf);
rb->lcd_update_rect(0, 1, LCD_WIDTH, Y_1_POS);
}
/* -----------------------------------------------------------------------
Process typing buttons: 1-9, '.', sign
main operand "result" and typingbuf are processed seperately here.
----------------------------------------------------------------------- */
static void typingProcess(void){
switch( CAL_BUTTON ){
case btn_sign:
if (calStatus == cal_typing ||
calStatus == cal_dotted)
typingbuf[0] = (typingbuf[0]=='-')?' ':'-';
result = -result;
break;
case btn_dot:
operInputted = false;
switch(calStatus){
case cal_normal:
clearInput();
*typingbufPointer = '0';
typingbufPointer++;
case cal_typing:
calStatus = cal_dotted;
*typingbufPointer = '.';
if (typingbufPointer != typingbuf+DIGITLEN+1)
typingbufPointer++;
break;
default: /* cal_dotted */
break;
}
break;
default: /* 0-9 */
operInputted = false;
/* normal,0; normal,1-9; typing,0; typing,1-9 */
switch(calStatus){
case cal_normal:
if(CAL_BUTTON == btn_0 )
break; /* first input is 0, ignore */
clearInput();
/*no operator means start a new calculation*/
if (oper ==' ')
clearOperand();
calStatus = cal_typing;
/* go on typing, no break */
case cal_typing:
case cal_dotted:
switch(CAL_BUTTON){
case btn_0:
*typingbufPointer = '0';
break;
default:
*typingbufPointer=(7+btn_col-3*(btn_row-1))+ '0';
break;
}
if (typingbufPointer!=typingbuf+DIGITLEN+1){
typingbufPointer++;
{/* result processing */
if (calStatus == cal_typing) power++;
if (CAL_BUTTON != btn_0)
result= result +
SIGN(result)*
(7+btn_col-3*(btn_row-1))*modifier;
modifier /= 10;
}
}
else /* last byte always '\0' */
*typingbufPointer = 0;
break;
default: /* cal_error, cal_exit */
break;
}
break; /* default, 0-9 */
} /* switch( CAL_BUTTON ) */
}
/* -----------------------------------------------------------------------
Handle delete operation
main operand "result" and typingbuf are processed seperately here.
----------------------------------------------------------------------- */
#ifdef CALCULATOR_CLEAR
static void doDelete(void){
deleteAnimation(18);
switch(calStatus){
case cal_dotted:
if (*(typingbufPointer-1) == '.'){
/* if dotted and deleting '.',
change status and delete '.' below */
calStatus = cal_typing;
}
else{ /* if dotted and not deleting '.',
power stays */
power++; /* counter "power--;" below */
}
case cal_typing:
typingbufPointer--;
{/* result processing */ /* 0-9, '.' */
/* if deleting '.', do nothing */
if ( *typingbufPointer != '.'){
power--;
modifier *= 10;
result = result - SIGN(result)*
((*typingbufPointer)- '0')*modifier;
}
}
*typingbufPointer = 0;
/* if (only one digit left and it's 0)
or no digit left, change status*/
if ( typingbufPointer == typingbuf+1 ||
( typingbufPointer == typingbuf+2 &&
*(typingbufPointer-1) == '0' ))
calStatus = cal_normal;
break;
default: /* normal, error, exit */
break;
}
}
#endif
/* -----------------------------------------------------------------------
Handle buttons on basic screen
----------------------------------------------------------------------- */
static void basicButtonsProcess(void){
switch (btn) {
case CALCULATOR_INPUT:
if (calStatus == cal_error && (CAL_BUTTON != btn_C) ) break;
flashButton();
switch( CAL_BUTTON ){
case btn_MR:
operInputted = false;
result = memTemp; power = memTempPower;
calStatus = cal_normal;
break;
case btn_M:
formatResult();
if (memTemp > MINIMUM)
doAdd(&memTemp, &memTempPower, result, power);
else {
/* if result is too small and memTemp = 0,
doAdd will not add */
memTemp = result;
memTempPower = power;
}
calStatus = cal_normal;
break;
case btn_C: clearMem(); break;
case btn_CE: clearInput(); break;
case btn_bas:
buttonGroup = sciButtons;
printButtonGroups(buttonGroup);
break;
/* one operand calculation, may be changed to
like sin, cos, log, etc */
case btn_sqr:
case btn_square:
case btn_rec:
formatResult(); /* not necessary, just for safty */
oneOperand();
break;
case_btn_equal: /* F3 shortkey entrance */
case btn_equal:
formatResult();
calStatus = cal_normal;
operInputted = false;
if (oper != ' ') twoOperands();
break;
case btn_div:
case btn_time:
case btn_minus:
case btn_add:
if(!operInputted) {twoOperands(); operInputted = true;}
oper = buttonChar[basicButtons][btn_row][btn_col][0];
#ifdef CALCULATOR_OPERATORS
case_cycle_operators: /* F2 shortkey entrance */
#endif
calStatus = cal_normal;
formatResult();
operand = result;
operandPower = power;
break;
case btn_sign:
case btn_dot:
default: /* 0-9 */
typingProcess();
break;
} /* switch (CAL_BUTTON) */
break;
#ifdef CALCULATOR_OPERATORS
case CALCULATOR_OPERATORS:
if (calStatus == cal_error) break;
if (!operInputted) {twoOperands(); operInputted = true;}
switch (oper){
case ' ':
case '/': oper = '+'; flashButton(); break;
case '+': oper = '-'; flashButton(); break;
case '-': oper = '*'; flashButton(); break;
case '*': oper = '/'; flashButton(); break;
}
goto case_cycle_operators;
break;
#endif
case CALCULATOR_CALC:
if (calStatus == cal_error) break;
flashButton();
goto case_btn_equal;
break;
default: break;
}
printResult();
}
/* -----------------------------------------------------------------------
Handle buttons on scientific screen
----------------------------------------------------------------------- */
static void sciButtonsProcess(void){
switch (btn) {
case CALCULATOR_INPUT:
if (calStatus == cal_error && (CAL_BUTTON != sci_sci) ) break;
flashButton();
switch( CAL_BUTTON ){
case sci_pi:
result = M_PI; power = 0;
calStatus = cal_normal;
break;
case sci_xy:
/*Not implemented yet
Maybe it could use x^y = exp(y*ln(x))*/
break;
case sci_sci:
buttonGroup = basicButtons;
printButtonGroups(basicButtons);
break;
case sci_fac:
case sci_sin:
case sci_asin:
case sci_cos:
case sci_acos:
case sci_tan:
case sci_atan:
case sci_ln:
case sci_exp:
case sci_log:
formatResult(); /* not necessary, just for safty */
oneOperand();
break;
case btn_sign:
case btn_dot:
default: /* 0-9 */
typingProcess();
break;
} /* switch (CAL_BUTTON) */
break;
#ifdef CALCULATOR_OPERATORS
case CALCULATOR_OPERATORS:
if (calStatus == cal_error) break;
if (!operInputted) {twoOperands(); operInputted = true;}
switch (oper){
case ' ': oper = '+'; break;
case '/': oper = '+'; deleteAnimation(1); break;
case '+': oper = '-'; deleteAnimation(1); break;
case '-': oper = '*'; deleteAnimation(1); break;
case '*': oper = '/'; deleteAnimation(1); break;
}
calStatus = cal_normal;
formatResult();
operand = result;
operandPower = power;
break;
#endif
case CALCULATOR_CALC:
if (calStatus == cal_error) break;
formatResult();
calStatus = cal_normal;
operInputted = false;
if (oper != ' ') twoOperands();
break;
default: break;
}
printResult();
}
/* -----------------------------------------------------------------------
move button index
Invert display new button, invert back previous button
----------------------------------------------------------------------- */
static int handleButton(int button){
switch(button)
{
case CALCULATOR_INPUT:
case CALCULATOR_CALC:
#ifdef CALCULATOR_INPUT_CALC_PRE
if (lastbtn != CALCULATOR_INPUT_CALC_PRE)
break;
/* no unconditional break; here! */
#endif
#ifdef CALCULATOR_OPERATORS
case CALCULATOR_OPERATORS:
#endif
switch(buttonGroup){
case basicButtons:
basicButtonsProcess();
break;
case sciButtons:
sciButtonsProcess();
break;
}
break;
#ifdef CALCULATOR_CLEAR
case CALCULATOR_CLEAR:
switch(calStatus){
case cal_typing:
case cal_dotted:
doDelete();
break;
default: /* cal_normal, cal_error, cal_exit */
clearMem();
break;
}
printResult();
break;
#endif
case CALCULATOR_LEFT:
case CALCULATOR_LEFT | BUTTON_REPEAT:
move_with_wrap_and_shift(
&btn_col, -1, BUTTON_COLS,
&btn_row, 0, BUTTON_ROWS);
break;
case CALCULATOR_RIGHT:
case CALCULATOR_RIGHT | BUTTON_REPEAT:
move_with_wrap_and_shift(
&btn_col, 1, BUTTON_COLS,
&btn_row, 0, BUTTON_ROWS);
break;
#ifdef CALCULATOR_UP
case CALCULATOR_UP:
case CALCULATOR_UP | BUTTON_REPEAT:
move_with_wrap_and_shift(
&btn_row, -1, BUTTON_ROWS,
&btn_col, 0, BUTTON_COLS);
break;
#endif
#ifdef CALCULATOR_DOWN
case CALCULATOR_DOWN:
case CALCULATOR_DOWN | BUTTON_REPEAT:
move_with_wrap_and_shift(
&btn_row, 1, BUTTON_ROWS,
&btn_col, 0, BUTTON_COLS);
break;
#endif
#ifdef CALCULATOR_UP_W_SHIFT
case CALCULATOR_UP_W_SHIFT:
case CALCULATOR_UP_W_SHIFT | BUTTON_REPEAT:
move_with_wrap_and_shift(
&btn_row, -1, BUTTON_ROWS,
&btn_col, -1, BUTTON_COLS);
break;
#endif
#ifdef CALCULATOR_DOWN_W_SHIFT
case CALCULATOR_DOWN_W_SHIFT:
case CALCULATOR_DOWN_W_SHIFT | BUTTON_REPEAT:
move_with_wrap_and_shift(
&btn_row, 1, BUTTON_ROWS,
&btn_col, 1, BUTTON_COLS);
break;
#endif
#ifdef CALCULATOR_LEFT_W_SHIFT
case CALCULATOR_LEFT_W_SHIFT:
case CALCULATOR_LEFT_W_SHIFT | BUTTON_REPEAT:
move_with_wrap_and_shift(
&btn_col, -1, BUTTON_COLS,
&btn_row, -1, BUTTON_ROWS);
break;
#endif
#ifdef CALCULATOR_RIGHT_W_SHIFT
case CALCULATOR_RIGHT_W_SHIFT:
case CALCULATOR_RIGHT_W_SHIFT | BUTTON_REPEAT:
move_with_wrap_and_shift(
&btn_col, 1, BUTTON_COLS,
&btn_row, 1, BUTTON_ROWS);
break;
#endif
#ifdef CALCULATOR_RC_QUIT
case CALCULATOR_RC_QUIT:
#endif
case CALCULATOR_QUIT:
return -1;
}
return 0;
}
/* -----------------------------------------------------------------------
Main();
----------------------------------------------------------------------- */
enum plugin_status plugin_start(const void* parameter)
{
(void)parameter;
/* now go ahead and have fun! */
#ifdef HAVE_TOUCHSCREEN
rb->touchscreen_set_mode(TOUCHSCREEN_POINT);
#endif
cal_initial();
while (calStatus != cal_exit ) {
btn = rb->button_get_w_tmo(HZ/2);
#ifdef HAVE_TOUCHSCREEN
if(btn & BUTTON_TOUCHSCREEN)
{
struct ts_raster_result res;
if(touchscreen_map_raster(&calc_raster, rb->button_get_data() >> 16,
rb->button_get_data() & 0xffff, &res) == 1)
{
btn_row = res.y;
btn_col = res.x;
drawButtons(buttonGroup);
drawLines();
rb->lcd_update();
prev_btn_row = btn_row;
prev_btn_col = btn_col;
if(btn & BUTTON_REL)
{
btn = CALCULATOR_INPUT;
switch(buttonGroup){
case basicButtons:
basicButtonsProcess();
break;
case sciButtons:
sciButtonsProcess();
break;
}
btn = BUTTON_TOUCHSCREEN;
}
}
}
#endif
if (handleButton(btn) == -1)
{
calStatus = cal_exit;
printResult();
}
else
{
drawButtons(buttonGroup);
drawLines();
}
rb->lcd_update();
if(rb->default_event_handler(btn) == SYS_USB_CONNECTED)
return PLUGIN_USB_CONNECTED;
if (btn != BUTTON_NONE)
lastbtn = btn;
} /* while (calStatus != cal_exit ) */
rb->button_clear_queue();
return PLUGIN_OK;
}
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